Merge "MediaCodec refactoring part 1-c: buffer ownership"
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index b2699fa..0533ba6 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -330,8 +330,8 @@
 
     static status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle);
-    static status_t stopAudioSource(audio_io_handle_t handle);
+                                      audio_patch_handle_t *handle);
+    static status_t stopAudioSource(audio_patch_handle_t handle);
 
     static status_t setMasterMono(bool mono);
     static status_t getMasterMono(bool *mono);
diff --git a/include/media/IAudioPolicyService.h b/include/media/IAudioPolicyService.h
index ef15a0c..5637dd5 100644
--- a/include/media/IAudioPolicyService.h
+++ b/include/media/IAudioPolicyService.h
@@ -164,8 +164,8 @@
 
     virtual status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle) = 0;
-    virtual status_t stopAudioSource(audio_io_handle_t handle) = 0;
+                                      audio_patch_handle_t *handle) = 0;
+    virtual status_t stopAudioSource(audio_patch_handle_t handle) = 0;
 
     virtual status_t setMasterMono(bool mono) = 0;
     virtual status_t getMasterMono(bool *mono) = 0;
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 33974e0..d45b12f 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -1175,14 +1175,14 @@
 
 status_t AudioSystem::startAudioSource(const struct audio_port_config *source,
                                        const audio_attributes_t *attributes,
-                                       audio_io_handle_t *handle)
+                                       audio_patch_handle_t *handle)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return PERMISSION_DENIED;
     return aps->startAudioSource(source, attributes, handle);
 }
 
-status_t AudioSystem::stopAudioSource(audio_io_handle_t handle)
+status_t AudioSystem::stopAudioSource(audio_patch_handle_t handle)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) return PERMISSION_DENIED;
diff --git a/media/libmedia/IAudioPolicyService.cpp b/media/libmedia/IAudioPolicyService.cpp
index 946da8a..2fb2da6 100644
--- a/media/libmedia/IAudioPolicyService.cpp
+++ b/media/libmedia/IAudioPolicyService.cpp
@@ -738,7 +738,7 @@
 
     virtual status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle)
+                                      audio_patch_handle_t *handle)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
@@ -755,11 +755,11 @@
         if (status != NO_ERROR) {
             return status;
         }
-        *handle = (audio_io_handle_t)reply.readInt32();
+        *handle = (audio_patch_handle_t)reply.readInt32();
         return status;
     }
 
-    virtual status_t stopAudioSource(audio_io_handle_t handle)
+    virtual status_t stopAudioSource(audio_patch_handle_t handle)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
@@ -1332,7 +1332,7 @@
             data.read(&source, sizeof(struct audio_port_config));
             audio_attributes_t attributes;
             data.read(&attributes, sizeof(audio_attributes_t));
-            audio_io_handle_t handle = {};
+            audio_patch_handle_t handle = AUDIO_PATCH_HANDLE_NONE;
             status_t status = startAudioSource(&source, &attributes, &handle);
             reply->writeInt32(status);
             reply->writeInt32(handle);
@@ -1341,7 +1341,7 @@
 
         case STOP_AUDIO_SOURCE: {
             CHECK_INTERFACE(IAudioPolicyService, data, reply);
-            audio_io_handle_t handle = (audio_io_handle_t)data.readInt32();
+            audio_patch_handle_t handle = (audio_patch_handle_t) data.readInt32();
             status_t status = stopAudioSource(handle);
             reply->writeInt32(status);
             return NO_ERROR;
diff --git a/media/libstagefright/FLACExtractor.cpp b/media/libstagefright/FLACExtractor.cpp
index 1af7dc1..1b88e5d 100644
--- a/media/libstagefright/FLACExtractor.cpp
+++ b/media/libstagefright/FLACExtractor.cpp
@@ -73,6 +73,10 @@
 class FLACParser : public RefBase {
 
 public:
+    enum {
+        kMaxChannels = 8,
+    };
+
     explicit FLACParser(
         const sp<DataSource> &dataSource,
         // If metadata pointers aren't provided, we don't fill them
@@ -122,7 +126,7 @@
     // media buffers
     size_t mMaxBufferSize;
     MediaBufferGroup *mGroup;
-    void (*mCopy)(short *dst, const int *const *src, unsigned nSamples, unsigned nChannels);
+    void (*mCopy)(short *dst, const int * src[kMaxChannels], unsigned nSamples, unsigned nChannels);
 
     // handle to underlying libFLAC parser
     FLAC__StreamDecoder *mDecoder;
@@ -139,7 +143,7 @@
     bool mWriteRequested;
     bool mWriteCompleted;
     FLAC__FrameHeader mWriteHeader;
-    const FLAC__int32 * const *mWriteBuffer;
+    FLAC__int32 const * mWriteBuffer[kMaxChannels];
 
     // most recent error reported by libFLAC parser
     FLAC__StreamDecoderErrorStatus mErrorStatus;
@@ -323,7 +327,7 @@
         mWriteRequested = false;
         // FLAC parser doesn't free or realloc buffer until next frame or finish
         mWriteHeader = frame->header;
-        mWriteBuffer = buffer;
+        memmove(mWriteBuffer, buffer, sizeof(const FLAC__int32 * const) * getChannels());
         mWriteCompleted = true;
         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
     } else {
@@ -382,7 +386,7 @@
 
 static void copyMono8(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -392,7 +396,7 @@
 
 static void copyStereo8(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -401,7 +405,7 @@
     }
 }
 
-static void copyMultiCh8(short *dst, const int *const *src, unsigned nSamples, unsigned nChannels)
+static void copyMultiCh8(short *dst, const int * src[FLACParser::kMaxChannels], unsigned nSamples, unsigned nChannels)
 {
     for (unsigned i = 0; i < nSamples; ++i) {
         for (unsigned c = 0; c < nChannels; ++c) {
@@ -412,7 +416,7 @@
 
 static void copyMono16(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -422,7 +426,7 @@
 
 static void copyStereo16(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -431,7 +435,7 @@
     }
 }
 
-static void copyMultiCh16(short *dst, const int *const *src, unsigned nSamples, unsigned nChannels)
+static void copyMultiCh16(short *dst, const int * src[FLACParser::kMaxChannels], unsigned nSamples, unsigned nChannels)
 {
     for (unsigned i = 0; i < nSamples; ++i) {
         for (unsigned c = 0; c < nChannels; ++c) {
@@ -444,7 +448,7 @@
 
 static void copyMono24(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -454,7 +458,7 @@
 
 static void copyStereo24(
         short *dst,
-        const int *const *src,
+        const int * src[FLACParser::kMaxChannels],
         unsigned nSamples,
         unsigned /* nChannels */) {
     for (unsigned i = 0; i < nSamples; ++i) {
@@ -463,7 +467,7 @@
     }
 }
 
-static void copyMultiCh24(short *dst, const int *const *src, unsigned nSamples, unsigned nChannels)
+static void copyMultiCh24(short *dst, const int * src[FLACParser::kMaxChannels], unsigned nSamples, unsigned nChannels)
 {
     for (unsigned i = 0; i < nSamples; ++i) {
         for (unsigned c = 0; c < nChannels; ++c) {
@@ -474,7 +478,7 @@
 
 static void copyTrespass(
         short * /* dst */,
-        const int *const * /* src */,
+        const int *[FLACParser::kMaxChannels] /* src */,
         unsigned /* nSamples */,
         unsigned /* nChannels */) {
     TRESPASS();
@@ -499,7 +503,6 @@
       mStreamInfoValid(false),
       mWriteRequested(false),
       mWriteCompleted(false),
-      mWriteBuffer(NULL),
       mErrorStatus((FLAC__StreamDecoderErrorStatus) -1)
 {
     ALOGV("FLACParser::FLACParser");
@@ -555,7 +558,7 @@
     }
     if (mStreamInfoValid) {
         // check channel count
-        if (getChannels() == 0 || getChannels() > 8) {
+        if (getChannels() == 0 || getChannels() > kMaxChannels) {
             ALOGE("unsupported channel count %u", getChannels());
             return NO_INIT;
         }
@@ -591,7 +594,7 @@
         static const struct {
             unsigned mChannels;
             unsigned mBitsPerSample;
-            void (*mCopy)(short *dst, const int *const *src, unsigned nSamples, unsigned nChannels);
+            void (*mCopy)(short *dst, const int * src[kMaxChannels], unsigned nSamples, unsigned nChannels);
         } table[] = {
             { 1,  8, copyMono8    },
             { 2,  8, copyStereo8  },
diff --git a/media/libstagefright/MediaCodecList.cpp b/media/libstagefright/MediaCodecList.cpp
index 93643c2..d3b34b7 100644
--- a/media/libstagefright/MediaCodecList.cpp
+++ b/media/libstagefright/MediaCodecList.cpp
@@ -1169,7 +1169,7 @@
         }
     }
 
-    if (flags & kPreferSoftwareCodecs) {
+    if (flags & kPreferSoftwareCodecs || property_get_bool("debug.stagefright.swcodec", false)) {
         matches->sort(compareSoftwareCodecsFirst);
     }
 }
diff --git a/media/libstagefright/codec2/Android.mk b/media/libstagefright/codec2/Android.mk
new file mode 100644
index 0000000..a463205
--- /dev/null
+++ b/media/libstagefright/codec2/Android.mk
@@ -0,0 +1,20 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+        C2.cpp    \
+
+LOCAL_C_INCLUDES += \
+        $(TOP)/frameworks/av/media/libstagefright/codec2/include \
+        $(TOP)/frameworks/native/include/media/hardware \
+
+LOCAL_MODULE:= libstagefright_codec2
+LOCAL_CFLAGS += -Werror -Wall
+LOCAL_CLANG := true
+LOCAL_SANITIZE := unsigned-integer-overflow signed-integer-overflow
+
+include $(BUILD_SHARED_LIBRARY)
+
+################################################################################
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/media/libstagefright/codec2/C2.cpp b/media/libstagefright/codec2/C2.cpp
new file mode 100644
index 0000000..a51b073
--- /dev/null
+++ b/media/libstagefright/codec2/C2.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <C2.h>
+#include <C2Buffer.h>
+#include <C2Component.h>
+#include <C2Config.h>
+#include <C2Param.h>
+#include <C2ParamDef.h>
+#include <C2Work.h>
+
+namespace android {
+
+/**
+ * There is nothing here yet. This library is built to see what symbols and methods get
+ * defined as part of the API include files.
+ *
+ * Going forward, the Codec2 library will contain utility methods that are useful for
+ * Codec2 clients.
+ */
+
+} // namespace android
+
diff --git a/media/libstagefright/codec2/include/C2.h b/media/libstagefright/codec2/include/C2.h
new file mode 100644
index 0000000..7d00a03
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2.h
@@ -0,0 +1,287 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2_H_
+#define C2_H_
+
+#include <string>
+#include <vector>
+#include <list>
+
+#ifdef __ANDROID__
+
+#include <utils/Errors.h>       // for status_t
+#include <utils/Timers.h>       // for nsecs_t
+
+namespace android {
+
+#else
+
+#include <errno.h>
+typedef int64_t nsecs_t;
+
+enum {
+    GRALLOC_USAGE_SW_READ_OFTEN,
+    GRALLOC_USAGE_RENDERSCRIPT,
+    GRALLOC_USAGE_HW_TEXTURE,
+    GRALLOC_USAGE_HW_COMPOSER,
+    GRALLOC_USAGE_HW_VIDEO_ENCODER,
+    GRALLOC_USAGE_PROTECTED,
+    GRALLOC_USAGE_SW_WRITE_OFTEN,
+    GRALLOC_USAGE_HW_RENDER,
+};
+
+#endif
+
+/** \mainpage Codec2
+ *
+ * Codec2 is a frame-based data processing API used by android.
+ *
+ * The framework accesses components via the \ref API.
+ */
+
+/** \ingroup API
+ *
+ * The Codec2 API defines the operation of data processing components and their interaction with
+ * the rest of the system.
+ *
+ * Coding Conventions
+ *
+ * Mitigating Binary Compatibility.
+ *
+ * While full binary compatibility is not a goal of the API (due to our use of STL), we try to
+ * mitigate binary breaks by adhering to the following conventions:
+ *
+ * - at most one vtable with placeholder virtual methods
+ * - all optional/placeholder virtual methods returning a status_t, with C2_NOT_IMPLEMENTED not
+ *   requiring any update to input/output arguments.
+ * - limiting symbol export of inline methods
+ * - use of pimpl (or shared-pimpl)
+ *
+ * Naming
+ *
+ * - all classes and types prefix with C2
+ * - classes for internal use prefix with _C2
+ * - enum values in global namespace prefix with C2_ all caps
+ * - enum values inside classes have no C2_ prefix as class already has it
+ * - supporting two kinds of enum naming: all-caps and kCamelCase
+ * \todo revisit kCamelCase for param-type
+ *
+ * Aspects
+ *
+ * Aspects define certain common behavior across a group of objects.
+ * - classes whose name matches _C2.*Aspect
+ * - only protected constructors
+ * - no desctructor and copiable
+ * - all methods are inline or static (this is opposite of the interface paradigm where all methods
+ *   are virtual, which would not work due to the at most one vtable rule.)
+ * - only private variables (this prevents subclasses interfering with the aspects.)
+ */
+
+/// \defgroup types Common Types
+/// @{
+
+/**
+ * C2String: basic string implementation
+ */
+typedef std::string C2String;
+typedef const char *C2StringLiteral;
+
+/**
+ * C2Error: status codes used.
+ */
+typedef int32_t C2Error;
+enum {
+#ifndef __ANDROID__
+    OK                  = 0,
+    BAD_VALUE           = -EINVAL,
+    BAD_INDEX           = -EOVERFLOW,
+    UNKNOWN_TRANSACTION = -EBADMSG,
+    ALREADY_EXISTS      = -EEXIST,
+    NAME_NOT_FOUND      = -ENOENT,
+    INVALID_OPERATION   = -ENOSYS,
+    NO_MEMORY           = -ENOMEM,
+    PERMISSION_DENIED   = -EPERM,
+    TIMED_OUT           = -ETIMEDOUT,
+    UNKNOWN_ERROR       = -EINVAL,
+#endif
+
+    C2_OK               = OK,                   ///< operation completed successfully
+
+    // bad input
+    C2_BAD_VALUE        = BAD_VALUE,            ///< argument has invalid value (user error)
+    C2_BAD_INDEX        = BAD_INDEX,            ///< argument uses invalid index (user error)
+    C2_UNSUPPORTED      = UNKNOWN_TRANSACTION,  ///< argument/index is value but not supported \todo is this really BAD_INDEX/VALUE?
+
+    // bad sequencing of events
+    C2_DUPLICATE        = ALREADY_EXISTS,       ///< object already exists
+    C2_NOT_FOUND        = NAME_NOT_FOUND,       ///< object not found
+    C2_BAD_STATE        = INVALID_OPERATION,    ///< operation is not permitted in the current state
+
+    // bad environment
+    C2_NO_MEMORY        = NO_MEMORY,            ///< not enough memory to complete operation
+    C2_NO_PERMISSION    = PERMISSION_DENIED,    ///< missing permission to complete operation
+    C2_TIMED_OUT        = TIMED_OUT,            ///< operation did not complete within timeout
+
+    // bad versioning
+    C2_NOT_IMPLEMENTED  = UNKNOWN_TRANSACTION,  ///< operation is not implemented (optional only) \todo for now reuse error code
+
+    // unknown fatal
+    C2_CORRUPTED        = UNKNOWN_ERROR,        ///< some unexpected error prevented the operation
+};
+
+/// @}
+
+/// \defgroup utils Utilities
+/// @{
+
+#define C2_DO_NOT_COPY(type, args...) \
+    type args& operator=(const type args&) = delete; \
+    type(const type args&) = delete; \
+
+#define C2_PURE __attribute__((pure))
+#define C2_CONST __attribute__((const))
+#define C2_HIDE __attribute__((visibility("hidden")))
+#define C2_INTERNAL __attribute__((internal_linkage))
+
+#define DEFINE_OTHER_COMPARISON_OPERATORS(type) \
+    inline bool operator!=(const type &other) { return !(*this == other); } \
+    inline bool operator<=(const type &other) { return (*this == other) || (*this < other); } \
+    inline bool operator>=(const type &other) { return !(*this < other); } \
+    inline bool operator>(const type &other) { return !(*this < other) && !(*this == other); }
+
+#define DEFINE_FIELD_BASED_COMPARISON_OPERATORS(type, field) \
+    inline bool operator<(const type &other) const { return field < other.field; } \
+    inline bool operator==(const type &other) const { return field == other.field; } \
+    DEFINE_OTHER_COMPARISON_OPERATORS(type)
+
+/// \cond INTERNAL
+
+/// \defgroup utils_internal
+/// @{
+
+template<typename... T> struct c2_types;
+
+/** specialization for a single type */
+template<typename T>
+struct c2_types<T> {
+    typedef typename std::decay<T>::type wide_type;
+    typedef wide_type narrow_type;
+    typedef wide_type mintype;
+};
+
+/** specialization for two types */
+template<typename T, typename U>
+struct c2_types<T, U> {
+    static_assert(std::is_floating_point<T>::value == std::is_floating_point<U>::value,
+                  "mixing floating point and non-floating point types is disallowed");
+    static_assert(std::is_signed<T>::value == std::is_signed<U>::value,
+                  "mixing signed and unsigned types is disallowed");
+
+    typedef typename std::decay<
+            decltype(true ? std::declval<T>() : std::declval<U>())>::type wide_type;
+    typedef typename std::decay<
+            typename std::conditional<sizeof(T) < sizeof(U), T, U>::type>::type narrow_type;
+    typedef typename std::conditional<
+            std::is_signed<T>::value, wide_type, narrow_type>::type mintype;
+};
+
+/// @}
+
+/// \endcond
+
+/**
+ * Type support utility class. Only supports similar classes, such as:
+ * - all floating point
+ * - all unsigned/all signed
+ * - all pointer
+ */
+template<typename T, typename U, typename... V>
+struct c2_types<T, U, V...> {
+    /** Common type that accommodates all template parameter types. */
+    typedef typename c2_types<typename c2_types<T, U>::wide_type, V...>::wide_type wide_type;
+    /** Narrowest type of the template parameter types. */
+    typedef typename c2_types<typename c2_types<T, U>::narrow_type, V...>::narrow_type narrow_type;
+    /** Type that accommodates the minimum value for any input for the template parameter types. */
+    typedef typename c2_types<typename c2_types<T, U>::mintype, V...>::mintype mintype;
+};
+
+/**
+ *  \ingroup utils_internal
+ * specialization for two values */
+template<typename T, typename U>
+inline constexpr typename c2_types<T, U>::wide_type c2_max(const T a, const U b) {
+    typedef typename c2_types<T, U>::wide_type wide_type;
+    return ({ wide_type a_(a), b_(b); a_ > b_ ? a_ : b_; });
+}
+
+/**
+ * Finds the maximum value of a list of "similarly typed" values.
+ *
+ * This is an extension to std::max where the types do not have to be identical, and the smallest
+ * resulting type is used that accommodates the argument types.
+ *
+ * \note Value types must be similar, e.g. all floating point, all pointers, all signed, or all
+ * unsigned.
+ *
+ * @return the largest of the input arguments.
+ */
+template<typename T, typename U, typename... V>
+constexpr typename c2_types<T, U, V...>::wide_type c2_max(const T a, const U b, const V ... c) {
+    typedef typename c2_types<T, U, V...>::wide_type wide_type;
+    return ({ wide_type a_(a), b_(c2_max(b, c...)); a_ > b_ ? a_ : b_; });
+}
+
+/**
+ *  \ingroup utils_internal
+ * specialization for two values */
+template<typename T, typename U>
+inline constexpr typename c2_types<T, U>::mintype c2_min(const T a, const U b) {
+    typedef typename c2_types<T, U>::wide_type wide_type;
+    return ({
+        wide_type a_(a), b_(b);
+        static_cast<typename c2_types<T, U>::mintype>(a_ < b_ ? a_ : b_);
+    });
+}
+
+/**
+ * Finds the minimum value of a list of "similarly typed" values.
+ *
+ * This is an extension to std::min where the types do not have to be identical, and the smallest
+ * resulting type is used that accommodates the argument types.
+ *
+ * \note Value types must be similar, e.g. all floating point, all pointers, all signed, or all
+ * unsigned.
+ *
+ * @return the smallest of the input arguments.
+ */
+template<typename T, typename U, typename... V>
+constexpr typename c2_types<T, U, V...>::mintype c2_min(const T a, const U b, const V ... c) {
+    typedef typename c2_types<U, V...>::mintype rest_type;
+    typedef typename c2_types<T, rest_type>::wide_type wide_type;
+    return ({
+        wide_type a_(a), b_(c2_min(b, c...));
+        static_cast<typename c2_types<T, rest_type>::mintype>(a_ < b_ ? a_ : b_);
+    });
+}
+
+/// @}
+
+#ifdef __ANDROID__
+} // namespace android
+#endif
+
+#endif  // C2_H_
diff --git a/media/libstagefright/codec2/include/C2Buffer.h b/media/libstagefright/codec2/include/C2Buffer.h
new file mode 100644
index 0000000..9f6b487
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2Buffer.h
@@ -0,0 +1,1777 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2BUFFER_H_
+#define C2BUFFER_H_
+
+#include <C2.h>
+#include <C2Param.h> // for C2Info
+
+#include <list>
+#include <memory>
+
+typedef int C2Fence;
+
+#ifdef __ANDROID__
+
+// #include <system/window.h>
+#include <cutils/native_handle.h>
+#include <hardware/gralloc.h> // TODO: remove
+
+typedef native_handle_t C2Handle;
+
+#else
+
+typedef void* C2Handle;
+
+#endif
+
+namespace android {
+
+/// \defgroup buffer Buffers
+/// @{
+
+/// \defgroup buffer_sync Synchronization
+/// @{
+
+/**
+ * Synchronization is accomplished using event and fence objects.
+ *
+ * These are cross-process extensions of promise/future infrastructure.
+ * Events are analogous to std::promise<void>, whereas fences are to std::shared_future<void>.
+ *
+ * Fences and events are shareable/copyable.
+ *
+ * Fences are used in two scenarios, and all copied instances refer to the same event.
+ * \todo do events need to be copyable or should they be unique?
+ *
+ * acquire sync fence object: signaled when it is safe for the component or client to access
+ * (the contents of) an object.
+ *
+ * release sync fence object: \todo
+ *
+ * Fences can be backed by hardware. Hardware fences are guaranteed to signal NO MATTER WHAT within
+ * a short (platform specific) amount of time; this guarantee is usually less than 15 msecs.
+ */
+
+/**
+ * Fence object used by components and the framework.
+ *
+ * Implements the waiting for an event, analogous to a 'future'.
+ *
+ * To be implemented by vendors if using HW fences.
+ */
+class C2Fence {
+public:
+    /**
+     * Waits for a fence to be signaled with a timeout.
+     *
+     * \todo a mechanism to cancel a wait - for now the only way to do this is to abandon the
+     * event, but fences are shared so canceling a wait will cancel all waits.
+     *
+     * \param timeoutNs           the maximum time to wait in nsecs
+     *
+     * \retval C2_OK            the fence has been signaled
+     * \retval C2_TIMED_OUT     the fence has not been signaled within the timeout
+     * \retval C2_BAD_STATE     the fence has been abandoned without being signaled (it will never
+     *                          be signaled)
+     * \retval C2_NO_PERMISSION no permission to wait for the fence (unexpected - system)
+     * \retval C2_CORRUPTED     some unknown error prevented waiting for the fence (unexpected)
+     */
+    C2Error wait(nsecs_t timeoutNs);
+
+    /**
+     * Used to check if this fence is valid (if there is a chance for it to be signaled.)
+     * A fence becomes invalid if the controling event is destroyed without it signaling the fence.
+     *
+     * \return whether this fence is valid
+     */
+    bool valid() const;
+
+    /**
+     * Used to check if this fence has been signaled (is ready).
+     *
+     * \return whether this fence has been signaled
+     */
+    bool ready() const;
+
+    /**
+     * Returns a file descriptor that can be used to wait for this fence in a select system call.
+     * \note The returned file descriptor, if valid, must be closed by the caller.
+     *
+     * This can be used in e.g. poll() system calls. This file becomes readable (POLLIN) when the
+     * fence is signaled, and bad (POLLERR) if the fence is abandoned.
+     *
+     * \return a file descriptor representing this fence (with ownership), or -1 if the fence
+     * has already been signaled (\todo or abandoned).
+     *
+     * \todo this must be compatible with fences used by gralloc
+     */
+    int fd() const;
+
+    /**
+     * Returns whether this fence is a hardware-backed fence.
+     * \return whether this is a hardware fence
+     */
+    bool isHW() const;
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * Event object used by components and the framework.
+ *
+ * Implements the signaling of an event, analogous to a 'promise'.
+ *
+ * Hardware backed events do not go through this object, and must be exposed directly as fences
+ * by vendors.
+ */
+class C2Event {
+public:
+    /**
+     * Returns a fence for this event.
+     */
+    C2Fence fence() const;
+
+    /**
+     * Signals (all) associated fence(s).
+     * This has no effect no effect if the event was already signaled or abandoned.
+     *
+     * \retval C2_OK            the fence(s) were successfully signaled
+     * \retval C2_BAD_STATE     the fence(s) have already been abandoned or merged (caller error)
+     * \retval C2_ALREADY_EXISTS the fence(s) have already been signaled (caller error)
+     * \retval C2_NO_PERMISSION no permission to signal the fence (unexpected - system)
+     * \retval C2_CORRUPTED     some unknown error prevented signaling the fence(s) (unexpected)
+     */
+    C2Error fire();
+
+    /**
+     * Trigger this event from the merging of the supplied fences. This means that it will be
+     * abandoned if any of these fences have been abandoned, and it will be fired if all of these
+     * fences have been signaled.
+     *
+     * \retval C2_OK            the merging was successfully done
+     * \retval C2_NO_MEMORY     not enough memory to perform the merging
+     * \retval C2_ALREADY_EXISTS    the fence have already been merged (caller error)
+     * \retval C2_BAD_STATE     the fence have already been signaled or abandoned (caller error)
+     * \retval C2_NO_PERMISSION no permission to merge the fence (unexpected - system)
+     * \retval C2_CORRUPTED     some unknown error prevented merging the fence(s) (unexpected)
+     */
+    C2Error merge(std::vector<C2Fence> fences);
+
+    /**
+     * Abandons the event and any associated fence(s).
+     * \note Call this to explicitly abandon an event before it is destructed to avoid a warning.
+     *
+     * This has no effect no effect if the event was already signaled or abandoned.
+     *
+     * \retval C2_OK            the fence(s) were successfully signaled
+     * \retval C2_BAD_STATE     the fence(s) have already been signaled or merged (caller error)
+     * \retval C2_ALREADY_EXISTS    the fence(s) have already been abandoned (caller error)
+     * \retval C2_NO_PERMISSION no permission to abandon the fence (unexpected - system)
+     * \retval C2_CORRUPTED     some unknown error prevented signaling the fence(s) (unexpected)
+     */
+    C2Error abandon();
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/// \addtogroup buf_internal Internal
+/// @{
+
+/**
+ * Interface for objects that encapsulate an updatable error value.
+ */
+struct _C2InnateError {
+    inline C2Error error() const { return mError; }
+
+protected:
+    _C2InnateError(C2Error error) : mError(error) { }
+
+    C2Error mError; // this error is updatable by the object
+};
+
+/// @}
+
+/**
+ * This is a utility template for objects protected by an acquire fence, so that errors during
+ * acquiring the object are propagated to the object itself.
+ */
+template<typename T>
+class C2Acquirable : public C2Fence {
+public:
+    /**
+     * Acquires the object protected by an acquire fence. Any errors during the mapping will be
+     * passed to the object.
+     *
+     * \return acquired object potentially invalidated if waiting for the fence failed.
+     */
+    T get();
+
+protected:
+    C2Acquirable(C2Error error, C2Fence fence, T t) : C2Fence(fence), mInitialError(error), mT(t) { }
+
+private:
+    C2Error mInitialError;
+    T mT; // TODO: move instead of copy
+};
+
+/// @}
+
+/// \defgroup linear Linear Data Blocks
+/// @{
+
+/**************************************************************************************************
+  LINEAR ASPECTS, BLOCKS AND VIEWS
+**************************************************************************************************/
+
+/**
+ * Common aspect for all objects that have a linear capacity.
+ */
+class _C2LinearCapacityAspect {
+/// \name Linear capacity interface
+/// @{
+public:
+    inline uint32_t capacity() const { return mCapacity; }
+
+protected:
+
+#if UINTPTR_MAX == 0xffffffff
+    static_assert(sizeof(size_t) == sizeof(uint32_t), "size_t is too big");
+#else
+    static_assert(sizeof(size_t) > sizeof(uint32_t), "size_t is too small");
+    // explicitly disable construction from size_t
+    inline explicit _C2LinearCapacityAspect(size_t capacity) = delete;
+#endif
+
+    inline explicit _C2LinearCapacityAspect(uint32_t capacity)
+      : mCapacity(capacity) { }
+
+    inline explicit _C2LinearCapacityAspect(const _C2LinearCapacityAspect *parent)
+        : mCapacity(parent == nullptr ? 0 : parent->capacity()) { }
+
+private:
+    const uint32_t mCapacity;
+/// @}
+};
+
+/**
+ * Aspect for objects that have a linear range.
+ *
+ * This class is copiable.
+ */
+class _C2LinearRangeAspect : public _C2LinearCapacityAspect {
+/// \name Linear range interface
+/// @{
+public:
+    inline uint32_t offset() const { return mOffset; }
+    inline uint32_t size() const { return mSize; }
+
+protected:
+    inline explicit _C2LinearRangeAspect(const _C2LinearCapacityAspect *parent)
+        : _C2LinearCapacityAspect(parent),
+          mOffset(0),
+          mSize(capacity()) { }
+
+    inline _C2LinearRangeAspect(const _C2LinearCapacityAspect *parent, size_t offset, size_t size)
+        : _C2LinearCapacityAspect(parent),
+          mOffset(c2_min(offset, capacity())),
+          mSize(c2_min(size, capacity() - mOffset)) { }
+
+    // subsection of the two [offset, offset + size] ranges
+    inline _C2LinearRangeAspect(const _C2LinearRangeAspect *parent, size_t offset, size_t size)
+        : _C2LinearCapacityAspect(parent == nullptr ? 0 : parent->capacity()),
+          mOffset(c2_min(c2_max(offset, parent == nullptr ? 0 : parent->offset()), capacity())),
+          mSize(c2_min(c2_min(size, parent == nullptr ? 0 : parent->size()), capacity() - mOffset)) { }
+
+private:
+    friend class _C2EditableLinearRange;
+    // invariants 0 <= mOffset <= mOffset + mSize <= capacity()
+    uint32_t mOffset;
+    uint32_t mSize;
+/// @}
+};
+
+/**
+ * Aspect for objects that have an editable linear range.
+ *
+ * This class is copiable.
+ */
+class _C2EditableLinearRange : public _C2LinearRangeAspect {
+protected:
+    inline explicit _C2EditableLinearRange(const _C2LinearCapacityAspect *parent)
+        : _C2LinearRangeAspect(parent) { }
+
+    inline _C2EditableLinearRange(const _C2LinearCapacityAspect *parent, size_t offset, size_t size)
+        : _C2LinearRangeAspect(parent, offset, size) { }
+
+    // subsection of the two [offset, offset + size] ranges
+    inline _C2EditableLinearRange(const _C2LinearRangeAspect *parent, size_t offset, size_t size)
+        : _C2LinearRangeAspect(parent, offset, size) { }
+
+/// \name Editable linear range interface
+/// @{
+
+    /**
+     * Sets the offset to |offset|, while trying to keep the end of the buffer unchanged (e.g.
+     * size will grow if offset is decreased, and may shrink if offset is increased.) Returns
+     * true if successful, which is equivalent to if 0 <= |offset| <= capacity().
+     *
+     * Note: setting offset and size will yield different result depending on the order of the
+     * operations. Always set offset first to ensure proper size.
+     */
+    inline bool setOffset(uint32_t offset) {
+        if (offset > capacity()) {
+            return false;
+        }
+
+        if (offset > mOffset + mSize) {
+            mSize = 0;
+        } else {
+            mSize = mOffset + mSize - offset;
+        }
+        mOffset = offset;
+        return true;
+    }
+    /**
+     * Sets the size to |size|. Returns true if successful, which is equivalent to
+     * if 0 <= |size| <= capacity() - offset().
+     *
+     * Note: setting offset and size will yield different result depending on the order of the
+     * operations. Always set offset first to ensure proper size.
+     */
+    inline bool setSize(uint32_t size) {
+        if (size > capacity() - mOffset) {
+            return false;
+        } else {
+            mSize = size;
+            return true;
+        }
+    }
+    /**
+     * Sets the offset to |offset| with best effort. Same as setOffset() except that offset will
+     * be clamped to the buffer capacity.
+     *
+     * Note: setting offset and size (even using best effort) will yield different result depending
+     * on the order of the operations. Always set offset first to ensure proper size.
+     */
+    inline void setOffset_be(uint32_t offset) {
+        if (offset > capacity()) {
+            offset = capacity();
+        }
+        if (offset > mOffset + mSize) {
+            mSize = 0;
+        } else {
+            mSize = mOffset + mSize - offset;
+        }
+        mOffset = offset;
+    }
+    /**
+     * Sets the size to |size| with best effort. Same as setSize() except that the selected region
+     * will be clamped to the buffer capacity (e.g. size is clamped to [0, capacity() - offset()]).
+     *
+     * Note: setting offset and size (even using best effort) will yield different result depending
+     * on the order of the operations. Always set offset first to ensure proper size.
+     */
+    inline void setSize_be(uint32_t size) {
+        mSize = std::min(size, capacity() - mOffset);
+    }
+/// @}
+};
+
+// ================================================================================================
+//  BLOCKS
+// ================================================================================================
+
+/**
+ * Blocks are sections of allocations. They can be either 1D or 2D.
+ */
+
+class C2LinearAllocation;
+
+class C2Block1D : public _C2LinearRangeAspect {
+public:
+    const C2Handle *handle() const;
+
+protected:
+    C2Block1D(std::shared_ptr<C2LinearAllocation> alloc);
+    C2Block1D(std::shared_ptr<C2LinearAllocation> alloc, size_t offset, size_t size);
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * Read view provides read-only access for a linear memory segment.
+ *
+ * This class is copiable.
+ */
+class C2ReadView : public _C2LinearCapacityAspect {
+public:
+    /**
+     * \return pointer to the start of the block or nullptr on error.
+     */
+    const uint8_t *data();
+
+    /**
+     * Returns a portion of this view.
+     *
+     * \param offset  the start offset of the portion. \note This is clamped to the capacity of this
+     *              view.
+     * \param size    the size of the portion. \note This is clamped to the remaining data from offset.
+     *
+     * \return a read view containing a portion of this view
+     */
+    C2ReadView subView(size_t offset, size_t size) const;
+
+    /**
+     * \return error during the creation/mapping of this view.
+     */
+    C2Error error();
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * Write view provides read/write access for a linear memory segment.
+ *
+ * This class is copiable. \todo movable only?
+ */
+class C2WriteView : public _C2EditableLinearRange {
+public:
+    /**
+     * Start of the block.
+     *
+     * \return pointer to the start of the block or nullptr on error.
+     */
+    uint8_t *base();
+
+    /**
+     * \return pointer to the block at the current offset or nullptr on error.
+     */
+    uint8_t *data();
+
+    /**
+     * \return error during the creation/mapping of this view.
+     */
+    C2Error error();
+
+private:
+    class Impl;
+    /// \todo should this be unique_ptr to make this movable only - to avoid inconsistent regions
+    /// between copies.
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * A constant (read-only) linear block (portion of an allocation) with an acquire fence.
+ * Blocks are unmapped when created, and can be mapped into a read view on demand.
+ *
+ * This class is copiable and contains a reference to the allocation that it is based on.
+ */
+class C2ConstLinearBlock : public C2Block1D {
+public:
+    /**
+     * Maps this block into memory and returns a read view for it.
+     *
+     * \return a read view for this block.
+     */
+    C2Acquirable<C2ReadView> map() const;
+
+    /**
+     * Returns a portion of this block.
+     *
+     * \param offset  the start offset of the portion. \note This is clamped to the capacity of this
+     *              block.
+     * \param size    the size of the portion. \note This is clamped to the remaining data from offset.
+     *
+     * \return a constant linear block containing a portion of this block
+     */
+    C2ConstLinearBlock subBlock(size_t offset, size_t size) const;
+
+    /**
+     * Returns the acquire fence for this block.
+     *
+     * \return a fence that must be waited on before reading the block.
+     */
+    C2Fence fence() const { return mFence; }
+
+private:
+    C2Fence mFence;
+};
+
+/**
+ * Linear block is a writeable 1D block. Once written, it can be shared in whole or in parts with
+ * consumers/readers as read-only const linear block(s).
+ */
+class C2LinearBlock : public C2Block1D {
+public:
+    /**
+     * Maps this block into memory and returns a write view for it.
+     *
+     * \return a write view for this block.
+     */
+    C2Acquirable<C2WriteView> map();
+
+    /**
+     * Creates a read-only const linear block for a portion of this block; optionally protected
+     * by an acquire fence. There are two ways to use this:
+     *
+     * 1) share ready block after writing data into the block. In this case no fence shall be
+     *    supplied, and the block shall not be modified after calling this method.
+     * 2) share block metadata before actually (finishing) writing the data into the block. In
+     *    this case a fence must be supplied that will be triggered when the data is written.
+     *    The block shall be modified only until firing the event for the fence.
+     */
+    C2ConstLinearBlock share(size_t offset, size_t size, C2Fence fence);
+};
+
+/// @}
+
+/**************************************************************************************************
+  CIRCULAR BLOCKS AND VIEWS
+**************************************************************************************************/
+
+/// \defgroup circular Circular buffer support
+/// @{
+
+/**
+ * Circular blocks can be used to share data between a writer and a reader (and/or other consumers)-
+ * in a memory-efficient way by reusing a section of memory. Circular blocks are a bit more complex
+ * than single reader/single writer schemes to facilitate block-based consuming of data.
+ *
+ * They can operate in two modes:
+ *
+ * 1) one writer that creates blocks to be consumed (this model can be used by components)
+ *
+ * 2) one writer that writes continuously, and one reader that can creates blocks to be consumed
+ *    by further recipients (this model is used by the framework, and cannot be used by components.)
+ *
+ * Circular blocks have four segments with running pointers:
+ *  - reserved: data reserved and available for the writer
+ *  - committed: data committed by the writer and available to the reader (if present)
+ *  - used: data used by consumers (if present)
+ *  - available: unused data available to be reserved
+ */
+class C2CircularBlock : public C2Block1D {
+    // TODO: add methods
+
+private:
+    size_t mReserved __unused;   // end of reserved section
+    size_t mCommitted __unused;  // end of committed section
+    size_t mUsed __unused;       // end of used section
+    size_t mFree __unused;       // end of free section
+};
+
+class _C2CircularBlockSegment : public _C2LinearCapacityAspect {
+public:
+    /**
+     * Returns the available size for this segment.
+     *
+     * \return currently available size for this segment
+     */
+    size_t available() const;
+
+    /**
+     * Reserve some space for this segment from its current start.
+     *
+     * \param size    desired space in bytes
+     * \param fence   a pointer to an acquire fence. If non-null, the reservation is asynchronous and
+     *              a fence will be stored here that will be signaled when the reservation is
+     *              complete. If null, the reservation is synchronous.
+     *
+     * \retval C2_OK            the space was successfully reserved
+     * \retval C2_NO_MEMORY     the space requested cannot be reserved
+     * \retval C2_TIMED_OUT     the reservation timed out \todo when?
+     * \retval C2_CORRUPTED     some unknown error prevented reserving space. (unexpected)
+     */
+    C2Error reserve(size_t size, C2Fence *fence /* nullable */);
+
+    /**
+     * Abandons a portion of this segment. This will move to the beginning of this segment.
+     *
+     * \note This methods is only allowed if this segment is producing blocks.
+     *
+     * \param size    number of bytes to abandon
+     *
+     * \retval C2_OK            the data was successfully abandoned
+     * \retval C2_TIMED_OUT     the operation timed out (unexpected)
+     * \retval C2_CORRUPTED     some unknown error prevented abandoning the data (unexpected)
+     */
+    C2Error abandon(size_t size);
+
+    /**
+     * Share a portion as block(s) with consumers (these are moved to the used section).
+     *
+     * \note This methods is only allowed if this segment is producing blocks.
+     * \note Share does not move the beginning of the segment. (\todo add abandon/offset?)
+     *
+     * \param size    number of bytes to share
+     * \param fence   fence to be used for the section
+     * \param blocks  list where the blocks of the section are appended to
+     *
+     * \retval C2_OK            the portion was successfully shared
+     * \retval C2_NO_MEMORY     not enough memory to share the portion
+     * \retval C2_TIMED_OUT     the operation timed out (unexpected)
+     * \retval C2_CORRUPTED     some unknown error prevented sharing the data (unexpected)
+     */
+    C2Error share(size_t size, C2Fence fence, std::list<C2ConstLinearBlock> &blocks);
+
+    /**
+     * Returns the beginning offset of this segment from the start of this circular block.
+     *
+     * @return beginning offset
+     */
+    size_t begin();
+
+    /**
+     * Returns the end offset of this segment from the start of this circular block.
+     *
+     * @return end offset
+     */
+    size_t end();
+};
+
+/**
+ * A circular write-view is a dynamic mapped view for a segment of a circular block. Care must be
+ * taken when using this view so that only the section owned by the segment is modified.
+ */
+class C2CircularWriteView : public _C2LinearCapacityAspect {
+public:
+    /**
+     * Start of the circular block.
+     * \note the segment does not own this pointer.
+     *
+     * \return pointer to the start of the circular block or nullptr on error.
+     */
+    uint8_t *base();
+
+    /**
+     * \return error during the creation/mapping of this view.
+     */
+    C2Error error();
+};
+
+/**
+ * The writer of a circular buffer.
+ *
+ * Can commit data to a reader (not supported for components) OR share data blocks directly with a
+ * consumer.
+ *
+ * If a component supports outputting data into circular buffers, it must allocate a circular
+ * block and use a circular writer.
+ */
+class C2CircularWriter : public _C2CircularBlockSegment {
+public:
+    /**
+     * Commits a portion of this segment to the next segment. This moves the beginning of the
+     * segment.
+     *
+     * \param size    number of bytes to commit to the next segment
+     * \param fence   fence used for the commit (the fence must signal before the data is committed)
+     */
+    C2Error commit(size_t size, C2Fence fence);
+
+    /**
+     * Maps this block into memory and returns a write view for it.
+     *
+     * \return a write view for this block.
+     */
+    C2Acquirable<C2CircularWriteView> map();
+};
+
+/// @}
+
+/// \defgroup graphic Graphic Data Blocks
+/// @{
+
+/**
+ * Interface for objects that have a width and height (planar capacity).
+ */
+class _C2PlanarCapacityAspect {
+/// \name Planar capacity interface
+/// @{
+public:
+    inline uint32_t width() const { return mWidth; }
+    inline uint32_t height() const { return mHeight; }
+
+protected:
+    inline _C2PlanarCapacityAspect(uint32_t width, uint32_t height)
+      : mWidth(width), mHeight(height) { }
+
+    inline _C2PlanarCapacityAspect(const _C2PlanarCapacityAspect *parent)
+        : mWidth(parent == nullptr ? 0 : parent->width()),
+          mHeight(parent == nullptr ? 0 : parent->height()) { }
+
+private:
+    const uint32_t mWidth;
+    const uint32_t mHeight;
+/// @}
+};
+
+/**
+ * C2Rect: rectangle type with non-negative coordinates.
+ *
+ * \note This struct has public fields without getters/setters. All methods are inline.
+ */
+struct C2Rect {
+// public:
+    uint32_t mLeft;
+    uint32_t mTop;
+    uint32_t mWidth;
+    uint32_t mHeight;
+
+    inline C2Rect(uint32_t width, uint32_t height)
+        : C2Rect(width, height, 0, 0) { }
+
+    inline C2Rect(uint32_t width, uint32_t height, uint32_t left, uint32_t top)
+        : mLeft(left), mTop(top), mWidth(width), mHeight(height) { }
+
+    // utility methods
+
+    inline bool isEmpty() const {
+        return mWidth == 0 || mHeight == 0;
+    }
+
+    inline bool isValid() const {
+        return mLeft <= ~mWidth && mTop <= ~mHeight;
+    }
+
+    inline operator bool() const {
+        return isValid() && !isEmpty();
+    }
+
+    inline bool operator!() const {
+        return !bool(*this);
+    }
+
+    inline bool contains(const C2Rect &other) const {
+        if (!isValid() || !other.isValid()) {
+            return false;
+        } else if (other.isEmpty()) {
+            return true;
+        } else {
+            return mLeft <= other.mLeft && mTop <= other.mTop
+                    && mLeft + mWidth >= other.mLeft + other.mWidth
+                    && mTop + mHeight >= other.mTop + other.mHeight;
+        }
+    }
+
+    inline bool operator==(const C2Rect &other) const {
+        if (!isValid()) {
+            return !other.isValid();
+        } else if (isEmpty()) {
+            return other.isEmpty();
+        } else {
+            return mLeft == other.mLeft && mTop == other.mTop
+                    && mWidth == other.mWidth && mHeight == other.mHeight;
+        }
+    }
+
+    inline bool operator!=(const C2Rect &other) const {
+        return !operator==(other);
+    }
+
+    inline bool operator>=(const C2Rect &other) const {
+        return contains(other);
+    }
+
+    inline bool operator>(const C2Rect &other) const {
+        return contains(other) && !operator==(other);
+    }
+
+    inline bool operator<=(const C2Rect &other) const {
+        return other.contains(*this);
+    }
+
+    inline bool operator<(const C2Rect &other) const {
+        return other.contains(*this) && !operator==(other);
+    }
+};
+
+/**
+ * C2PlaneInfo: information on the layout of flexible planes.
+ *
+ * Public fields without getters/setters.
+ */
+struct C2PlaneInfo {
+// public:
+    enum Channel : uint32_t {
+        Y,
+        R,
+        G,
+        B,
+        A,
+        Cr,
+        Cb,
+    } mChannel;
+
+    int32_t mColInc;               // column increment in bytes. may be negative
+    int32_t mRowInc;               // row increment in bytes. may be negative
+    uint32_t mHorizSubsampling;    // subsampling compared to width
+    uint32_t mVertSubsampling;     // subsampling compared to height
+
+    uint32_t mBitDepth;
+    uint32_t mAllocatedDepth;
+
+    inline ssize_t minOffset(uint32_t width, uint32_t height) {
+        ssize_t offs = 0;
+        if (width > 0 && mColInc < 0) {
+            offs += mColInc * (ssize_t)(width - 1);
+        }
+        if (height > 0 && mRowInc < 0) {
+            offs += mRowInc * (ssize_t)(height - 1);
+        }
+        return offs;
+    }
+
+    inline ssize_t maxOffset(uint32_t width, uint32_t height, uint32_t allocatedDepth) {
+        ssize_t offs = (allocatedDepth + 7) >> 3;
+        if (width > 0 && mColInc > 0) {
+            offs += mColInc * (ssize_t)(width - 1);
+        }
+        if (height > 0 && mRowInc > 0) {
+            offs += mRowInc * (ssize_t)(height - 1);
+        }
+        return offs;
+    }
+};
+
+struct C2PlaneLayout {
+public:
+    enum Type : uint32_t {
+        MEDIA_IMAGE_TYPE_UNKNOWN = 0,
+        MEDIA_IMAGE_TYPE_YUV = 0x100,
+        MEDIA_IMAGE_TYPE_YUVA,
+        MEDIA_IMAGE_TYPE_RGB,
+        MEDIA_IMAGE_TYPE_RGBA,
+    };
+
+    Type mType;
+    uint32_t mNumPlanes;               // number of planes
+
+    enum PlaneIndex : uint32_t {
+        Y = 0,
+        U = 1,
+        V = 2,
+        R = 0,
+        G = 1,
+        B = 2,
+        A = 3,
+        MAX_NUM_PLANES = 4,
+    };
+
+    C2PlaneInfo mPlanes[MAX_NUM_PLANES];
+};
+
+/**
+ * Aspect for objects that have a planar section (crop rectangle).
+ *
+ * This class is copiable.
+ */
+class _C2PlanarSection : public _C2PlanarCapacityAspect {
+/// \name Planar section interface
+/// @{
+public:
+    // crop can be an empty rect, does not have to line up with subsampling
+    // NOTE: we do not support floating-point crop
+    inline const C2Rect crop() { return mCrop; }
+
+    /**
+     *  Sets crop to crop intersected with [(0,0) .. (width, height)]
+     */
+    inline void setCrop_be(const C2Rect &crop);
+
+    /**
+     * If crop is within the dimensions of this object, it sets crop to it.
+     *
+     * \return true iff crop is within the dimensions of this object
+     */
+    inline bool setCrop(const C2Rect &crop);
+
+private:
+    C2Rect mCrop;
+/// @}
+};
+
+class C2Block2D : public _C2PlanarSection {
+public:
+    const C2Handle *handle() const;
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * Graphic view provides read or read-write access for a graphic block.
+ *
+ * This class is copiable.
+ *
+ * \note Due to the subsampling of graphic buffers, a read view must still contain a crop rectangle
+ * to ensure subsampling is followed. This results in nearly identical interface between read and
+ * write views, so C2GraphicView can encompass both of them.
+ */
+class C2GraphicView : public _C2PlanarSection {
+public:
+    /**
+     * \return pointer to the start of the block or nullptr on error.
+     */
+    const uint8_t *data() const;
+
+    /**
+     * \return pointer to the start of the block or nullptr on error.
+     */
+    uint8_t *data();
+
+    /**
+     * Returns a section of this view.
+     *
+     * \param rect    the dimension of the section. \note This is clamped to the crop of this view.
+     *
+     * \return a read view containing the requested section of this view
+     */
+    const C2GraphicView subView(const C2Rect &rect) const;
+    C2GraphicView subView(const C2Rect &rect);
+
+    /**
+     * \return error during the creation/mapping of this view.
+     */
+    C2Error error() const;
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+};
+
+/**
+ * A constant (read-only) graphic block (portion of an allocation) with an acquire fence.
+ * Blocks are unmapped when created, and can be mapped into a read view on demand.
+ *
+ * This class is copiable and contains a reference to the allocation that it is based on.
+ */
+class C2ConstGraphicBlock : public C2Block2D {
+public:
+    /**
+     * Maps this block into memory and returns a read view for it.
+     *
+     * \return a read view for this block.
+     */
+    C2Acquirable<const C2GraphicView> map() const;
+
+    /**
+     * Returns a section of this block.
+     *
+     * \param rect    the coordinates of the section. \note This is clamped to the crop rectangle of
+     *              this block.
+     *
+     * \return a constant graphic block containing a portion of this block
+     */
+    C2ConstGraphicBlock subBlock(const C2Rect &rect) const;
+
+    /**
+     * Returns the acquire fence for this block.
+     *
+     * \return a fence that must be waited on before reading the block.
+     */
+    C2Fence fence() const { return mFence; }
+
+private:
+    C2Fence mFence;
+};
+
+/**
+ * Graphic block is a writeable 2D block. Once written, it can be shared in whole or in part with
+ * consumers/readers as read-only const graphic block.
+ */
+class C2GraphicBlock : public C2Block2D {
+public:
+    /**
+     * Maps this block into memory and returns a write view for it.
+     *
+     * \return a write view for this block.
+     */
+    C2Acquirable<C2GraphicView> map();
+
+    /**
+     * Creates a read-only const linear block for a portion of this block; optionally protected
+     * by an acquire fence. There are two ways to use this:
+     *
+     * 1) share ready block after writing data into the block. In this case no fence shall be
+     *    supplied, and the block shall not be modified after calling this method.
+     * 2) share block metadata before actually (finishing) writing the data into the block. In
+     *    this case a fence must be supplied that will be triggered when the data is written.
+     *    The block shall be modified only until firing the event for the fence.
+     */
+    C2ConstGraphicBlock share(const C2Rect &crop, C2Fence fence);
+};
+
+/// @}
+
+/// \defgroup buffer_onj Buffer objects
+/// @{
+
+// ================================================================================================
+//  BUFFERS
+// ================================================================================================
+
+/// \todo: Do we still need this?
+///
+// There are 2 kinds of buffers: linear or graphic. Linear buffers can contain a single block, or
+// a list of blocks (LINEAR_CHUNKS). Support for list of blocks is optional, and can allow consuming
+// data from circular buffers or scattered data sources without extra memcpy. Currently, list of
+// graphic blocks is not supported.
+
+class C2LinearBuffer;   // read-write buffer
+class C2GraphicBuffer;  // read-write buffer
+class C2LinearChunksBuffer;
+
+/**
+ * C2BufferData: the main, non-meta data of a buffer. A buffer can contain either linear blocks
+ * or graphic blocks, and can contain either a single block or multiple blocks. This is determined
+ * by its type.
+ */
+class C2BufferData {
+public:
+    /**
+     *  The type of buffer data.
+     */
+    enum Type : uint32_t {
+        LINEAR,             ///< the buffer contains a single linear block
+        LINEAR_CHUNKS,      ///< the buffer contains one or more linear blocks
+        GRAPHIC,            ///< the buffer contains a single graphic block
+        GRAPHIC_CHUNKS,     ///< the buffer contains one of more graphic blocks
+    };
+
+    /**
+     * Gets the type of this buffer (data).
+     * \return the type of this buffer data.
+     */
+    Type type() const;
+
+    /**
+     * Gets the linear blocks of this buffer.
+     * \return a constant list of const linear blocks of this buffer.
+     * \retval empty list if this buffer does not contain linear block(s).
+     */
+    const std::list<C2ConstLinearBlock> linearBlocks() const;
+
+    /**
+     * Gets the graphic blocks of this buffer.
+     * \return a constant list of const graphic blocks of this buffer.
+     * \retval empty list if this buffer does not contain graphic block(s).
+     */
+    const std::list<C2ConstGraphicBlock> graphicBlocks() const;
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> mImpl;
+
+protected:
+    // no public constructor
+    // C2BufferData(const std::shared_ptr<const Impl> &impl) : mImpl(impl) {}
+};
+
+/**
+ * C2Buffer: buffer base class. These are always used as shared_ptrs. Though the underlying buffer
+ * objects (native buffers, ion buffers, or dmabufs) are reference-counted by the system,
+ * C2Buffers hold only a single reference.
+ *
+ * These objects cannot be used on the stack.
+ */
+class C2Buffer {
+public:
+    /**
+     * Gets the buffer's data.
+     *
+     * \return the buffer's data.
+     */
+    const C2BufferData data() const;
+
+    /**
+     * These will still work if used in onDeathNotify.
+     */
+#if 0
+    inline std::shared_ptr<C2LinearBuffer> asLinearBuffer() const {
+        return mType == LINEAR ? std::shared_ptr::reinterpret_cast<C2LinearBuffer>(this) : nullptr;
+    }
+
+    inline std::shared_ptr<C2GraphicBuffer> asGraphicBuffer() const {
+        return mType == GRAPHIC ? std::shared_ptr::reinterpret_cast<C2GraphicBuffer>(this) : nullptr;
+    }
+
+    inline std::shared_ptr<C2CircularBuffer> asCircularBuffer() const {
+        return mType == CIRCULAR ? std::shared_ptr::reinterpret_cast<C2CircularBuffer>(this) : nullptr;
+    }
+#endif
+
+    ///@name Pre-destroy notification handling
+    ///@{
+
+    /**
+     * Register for notification just prior to the destruction of this object.
+     */
+    typedef void (*OnDestroyNotify) (const C2Buffer *buf, void *arg);
+
+    /**
+     * Registers for a pre-destroy notification. This is called just prior to the destruction of
+     * this buffer (when this buffer is no longer valid.)
+     *
+     * \param onDestroyNotify   the notification callback
+     * \param arg               an arbitrary parameter passed to the callback
+     *
+     * \retval C2_OK        the registration was successful.
+     * \retval C2_DUPLICATE a notification was already registered for this callback and argument
+     * \retval C2_NO_MEMORY not enough memory to register for this callback
+     * \retval C2_CORRUPTED an unknown error prevented the registration (unexpected)
+     */
+    C2Error registerOnDestroyNotify(OnDestroyNotify *onDestroyNotify, void *arg = nullptr);
+
+    /**
+     * Unregisters a previously registered pre-destroy notification.
+     *
+     * \param onDestroyNotify   the notification callback
+     * \param arg               an arbitrary parameter passed to the callback
+     *
+     * \retval C2_OK        the unregistration was successful.
+     * \retval C2_NOT_FOUND the notification was not found
+     * \retval C2_CORRUPTED an unknown error prevented the registration (unexpected)
+     */
+    C2Error unregisterOnDestroyNotify(OnDestroyNotify *onDestroyNotify, void *arg = nullptr);
+
+    ///@}
+
+    virtual ~C2Buffer() = default;
+
+    ///@name Buffer-specific arbitrary metadata handling
+    ///@{
+
+    /**
+     * Gets the list of metadata associated with this buffer.
+     *
+     * \return a constant list of info objects associated with this buffer.
+     */
+    const std::list<std::shared_ptr<const C2Info>> infos() const;
+
+    /**
+     * Attaches (or updates) an (existing) metadata for this buffer.
+     * If the metadata is stream specific, the stream information will be reset.
+     *
+     * \param info Metadata to update
+     *
+     * \retval C2_OK        the metadata was successfully attached/updated.
+     * \retval C2_NO_MEMORY not enough memory to attach the metadata (this return value is not
+     *                      used if the same kind of metadata is already attached to the buffer).
+     */
+    C2Error setInfo(const std::shared_ptr<C2Info> &info);
+
+    /**
+     * Checks if there is a certain type of metadata attached to this buffer.
+     *
+     * \param index the parameter type of the metadata
+     *
+     * \return true iff there is a metadata with the parameter type attached to this buffer.
+     */
+    bool hasInfo(C2Param::Type index) const;
+    std::shared_ptr<C2Info> removeInfo(C2Param::Type index) const;
+    ///@}
+
+protected:
+    // no public constructor
+    inline C2Buffer() = default;
+
+private:
+//    Type _mType;
+};
+
+/**
+ * An extension of C2Info objects that can contain arbitrary buffer data.
+ *
+ * \note This object is not describable and contains opaque data.
+ */
+class C2InfoBuffer {
+public:
+    /**
+     * Gets the index of this info object.
+     *
+     * \return the parameter index.
+     */
+    const C2Param::Index index() const;
+
+    /**
+     * Gets the buffer's data.
+     *
+     * \return the buffer's data.
+     */
+    const C2BufferData data() const;
+};
+
+/// @}
+
+/**************************************************************************************************
+  ALLOCATIONS
+**************************************************************************************************/
+
+/// \defgroup allocator Allocation and memory placement
+/// @{
+
+/**
+ * Buffer/memory usage bits. These are used by the allocators to select optimal memory type/pool and
+ * buffer layout.
+ *
+ * \note This struct has public fields without getters/setters. All methods are inline.
+ */
+struct C2MemoryUsage {
+// public:
+    // TODO: match these to gralloc1.h
+    enum Consumer : uint64_t {
+        kSoftwareRead        = GRALLOC_USAGE_SW_READ_OFTEN,
+        kRenderScriptRead    = GRALLOC_USAGE_RENDERSCRIPT,
+        kTextureRead         = GRALLOC_USAGE_HW_TEXTURE,
+        kHardwareComposer    = GRALLOC_USAGE_HW_COMPOSER,
+        kHardwareEncoder     = GRALLOC_USAGE_HW_VIDEO_ENCODER,
+        kProtectedRead       = GRALLOC_USAGE_PROTECTED,
+    };
+
+    enum Producer : uint64_t {
+        kSoftwareWrite       = GRALLOC_USAGE_SW_WRITE_OFTEN,
+        kRenderScriptWrite   = GRALLOC_USAGE_RENDERSCRIPT,
+        kTextureWrite        = GRALLOC_USAGE_HW_RENDER,
+        kCompositionTarget   = GRALLOC_USAGE_HW_COMPOSER | GRALLOC_USAGE_HW_RENDER,
+        kHardwareDecoder     = GRALLOC_USAGE_HW_VIDEO_ENCODER,
+        kProtectedWrite      = GRALLOC_USAGE_PROTECTED,
+    };
+
+    uint64_t mConsumer; // e.g. input
+    uint64_t mProducer; // e.g. output
+};
+
+/**
+ * \ingroup linear allocator
+ * 1D allocation interface.
+ */
+class C2LinearAllocation : public _C2LinearCapacityAspect {
+public:
+    /**
+     * Maps a portion of an allocation starting from |offset| with |size| into local process memory.
+     * Stores the starting address into |addr|, or NULL if the operation was unsuccessful.
+     * |fenceFd| is a file descriptor referring to an acquire sync fence object. If it is already
+     * safe to access the buffer contents, then -1.
+     *
+     * \param offset          starting position of the portion to be mapped (this does not have to
+     *                      be page aligned)
+     * \param size            size of the portion to be mapped (this does not have to be page
+     *                      aligned)
+     * \param usage           the desired usage. \todo this must be kSoftwareRead and/or
+     *                      kSoftwareWrite.
+     * \param fenceFd         a pointer to a file descriptor if an async mapping is requested. If
+     *                      not-null, and acquire fence FD will be stored here on success, or -1
+     *                      on failure. If null, the mapping will be synchronous.
+     * \param addr            a pointer to where the starting address of the mapped portion will be
+     *                      stored. On failure, nullptr will be stored here.
+     *
+     * \todo Only one portion can be mapped at the same time - this is true for gralloc, but there
+     *       is no need for this for 1D buffers.
+     * \todo Do we need to support sync operation as we could just wait for the fence?
+     *
+     * \retval C2_OK        the operation was successful
+     * \retval C2_NO_PERMISSION no permission to map the portion
+     * \retval C2_TIMED_OUT the operation timed out
+     * \retval C2_NO_MEMORY not enough memory to complete the operation
+     * \retval C2_BAD_VALUE the parameters (offset/size) are invalid or outside the allocation, or
+     *                      the usage flags are invalid (caller error)
+     * \retval C2_CORRUPTED some unknown error prevented the operation from completing (unexpected)
+     */
+    virtual C2Error map(
+            size_t offset, size_t size, C2MemoryUsage usage, int *fenceFd /* nullable */,
+            void **addr /* nonnull */) = 0;
+
+    /**
+     * Unmaps a portion of an allocation at |addr| with |size|. These must be parameters previously
+     * passed to |map|; otherwise, this operation is a no-op.
+     *
+     * \param addr            starting address of the mapped region
+     * \param size            size of the mapped region
+     * \param fenceFd         a pointer to a file descriptor if an async unmapping is requested. If
+     *                      not-null, a release fence FD will be stored here on success, or -1
+     *                      on failure. This fence signals when the original allocation contains
+     *                      any changes that happened to the mapped region. If null, the unmapping
+     *                      will be synchronous.
+     *
+     * \retval C2_OK        the operation was successful
+     * \retval C2_TIMED_OUT the operation timed out
+     * \retval C2_BAD_VALUE the parameters (addr/size) do not correspond to previously mapped
+     *                      regions (caller error)
+     * \retval C2_CORRUPTED some unknown error prevented the operation from completing (unexpected)
+     * \retval C2_NO_PERMISSION no permission to unmap the portion (unexpected - system)
+     */
+    virtual C2Error unmap(void *addr, size_t size, int *fenceFd /* nullable */) = 0;
+
+    /**
+     * Returns true if this is a valid allocation.
+     *
+     * \todo remove?
+     */
+    virtual bool isValid() const = 0;
+
+    /**
+     * Returns a pointer to the allocation handle.
+     */
+    virtual const C2Handle *handle() const = 0;
+
+    /**
+     * Returns true if this is the same allocation as |other|.
+     */
+    virtual bool equals(const std::shared_ptr<C2LinearAllocation> &other) const = 0;
+
+protected:
+    // \todo should we limit allocation directly?
+    C2LinearAllocation(size_t capacity) : _C2LinearCapacityAspect(c2_min(capacity, UINT32_MAX)) {}
+    virtual ~C2LinearAllocation() = default;
+};
+
+/**
+ * \ingroup graphic allocator
+ * 2D allocation interface.
+ */
+class C2GraphicAllocation : public _C2PlanarCapacityAspect {
+public:
+    /**
+     * Maps a rectangular section (as defined by |rect|) of a 2D allocation into local process
+     * memory for flexible access. On success, it fills out |layout| with the plane specifications
+     * and fills the |addr| array with pointers to the first byte of the top-left pixel of each
+     * plane used. Otherwise, it leaves |layout| and |addr| untouched. |fenceFd| is a file
+     * descriptor referring to an acquire sync fence object. If it is already safe to access the
+     * buffer contents, then -1.
+     *
+     * \note Only one portion of the graphic allocation can be mapped at the same time. (This is
+     * from gralloc1 limitation.)
+     *
+     * \param rect            section to be mapped (this does not have to be aligned)
+     * \param usage           the desired usage. \todo this must be kSoftwareRead and/or
+     *                      kSoftwareWrite.
+     * \param fenceFd         a pointer to a file descriptor if an async mapping is requested. If
+     *                      not-null, and acquire fence FD will be stored here on success, or -1
+     *                      on failure. If null, the mapping will be synchronous.
+     * \param layout          a pointer to where the mapped planes' descriptors will be
+     *                      stored. On failure, nullptr will be stored here.
+     *
+     * \todo Do we need to support sync operation as we could just wait for the fence?
+     *
+     * \retval C2_OK        the operation was successful
+     * \retval C2_NO_PERMISSION no permission to map the section
+     * \retval C2_ALREADY_EXISTS there is already a mapped region (caller error)
+     * \retval C2_TIMED_OUT the operation timed out
+     * \retval C2_NO_MEMORY not enough memory to complete the operation
+     * \retval C2_BAD_VALUE the parameters (rect) are invalid or outside the allocation, or the
+     *                      usage flags are invalid (caller error)
+     * \retval C2_CORRUPTED some unknown error prevented the operation from completing (unexpected)
+
+     */
+    virtual C2Error map(
+            C2Rect rect, C2MemoryUsage usage, int *fenceFd,
+            // TODO: return <addr, size> buffers with plane sizes
+            C2PlaneLayout *layout /* nonnull */, uint8_t **addr /* nonnull */) = 0;
+
+    /**
+     * Unmaps the last mapped rectangular section.
+     *
+     * \param fenceFd         a pointer to a file descriptor if an async unmapping is requested. If
+     *                      not-null, a release fence FD will be stored here on success, or -1
+     *                      on failure. This fence signals when the original allocation contains
+     *                      any changes that happened to the mapped section. If null, the unmapping
+     *                      will be synchronous.
+     *
+     * \retval C2_OK        the operation was successful
+     * \retval C2_TIMED_OUT the operation timed out
+     * \retval C2_NOT_FOUND there is no mapped region (caller error)
+     * \retval C2_CORRUPTED some unknown error prevented the operation from completing (unexpected)
+     * \retval C2_NO_PERMISSION no permission to unmap the section (unexpected - system)
+     */
+    virtual C2Error unmap(C2Fence *fenceFd /* nullable */) = 0;
+
+    /**
+     * Returns true if this is a valid allocation.
+     *
+     * \todo remove?
+     */
+    virtual bool isValid() const = 0;
+
+    /**
+     * Returns a pointer to the allocation handle.
+     */
+    virtual const C2Handle *handle() const = 0;
+
+    /**
+     * Returns true if this is the same allocation as |other|.
+     */
+    virtual bool equals(const std::shared_ptr<const C2GraphicAllocation> &other) = 0;
+
+protected:
+    virtual ~C2GraphicAllocation();
+};
+
+/**
+ *  Allocators are used by the framework to allocate memory (allocations) for buffers. They can
+ *  support either 1D or 2D allocations.
+ *
+ *  \note In theory they could support both, but in practice, we will use only one or the other.
+ *
+ *  Never constructed on stack.
+ *
+ *  Allocators are provided by vendors.
+ */
+class C2Allocator {
+public:
+    /**
+     * Allocates a 1D allocation of given |capacity| and |usage|. If successful, the allocation is
+     * stored in |allocation|. Otherwise, |allocation| is set to 'nullptr'.
+     *
+     * \param capacity        the size of requested allocation (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param usage           the memory usage info for the requested allocation. \note that the
+     *                      returned allocation may be later used/mapped with different usage.
+     *                      The allocator should layout the buffer to be optimized for this usage,
+     *                      but must support any usage. One exception: protected buffers can
+     *                      only be used in a protected scenario.
+     * \param allocation      pointer to where the allocation shall be stored on success. nullptr
+     *                      will be stored here on failure
+     *
+     * \retval C2_OK        the allocation was successful
+     * \retval C2_NO_MEMORY not enough memory to complete the allocation
+     * \retval C2_TIMED_OUT the allocation timed out
+     * \retval C2_NO_PERMISSION     no permission to complete the allocation
+     * \retval C2_BAD_VALUE capacity or usage are not supported (invalid) (caller error)
+     * \retval C2_UNSUPPORTED       this allocator does not support 1D allocations
+     * \retval C2_CORRUPTED some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error allocateLinearBuffer(
+            uint32_t capacity __unused, C2MemoryUsage usage __unused,
+            std::shared_ptr<C2LinearAllocation> *allocation /* nonnull */) {
+        *allocation = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+    /**
+     * (Re)creates a 1D allocation from a native |handle|. If successful, the allocation is stored
+     * in |allocation|. Otherwise, |allocation| is set to 'nullptr'.
+     *
+     * \param handle      the handle for the existing allocation
+     * \param allocation  pointer to where the allocation shall be stored on success. nullptr
+     *                  will be stored here on failure
+     *
+     * \retval C2_OK        the allocation was recreated successfully
+     * \retval C2_NO_MEMORY not enough memory to recreate the allocation
+     * \retval C2_TIMED_OUT the recreation timed out (unexpected)
+     * \retval C2_NO_PERMISSION     no permission to recreate the allocation
+     * \retval C2_BAD_VALUE invalid handle (caller error)
+     * \retval C2_UNSUPPORTED       this allocator does not support 1D allocations
+     * \retval C2_CORRUPTED some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error recreateLinearBuffer(
+            const C2Handle *handle __unused,
+            std::shared_ptr<C2LinearAllocation> *allocation /* nonnull */) {
+        *allocation = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+    /**
+     * Allocates a 2D allocation of given |width|, |height|, |format| and |usage|. If successful,
+     * the allocation is stored in |allocation|. Otherwise, |allocation| is set to 'nullptr'.
+     *
+     * \param width           the width of requested allocation (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param height          the height of requested allocation (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param format          the pixel format of requested allocation. This could be a vendor
+     *                      specific format.
+     * \param usage           the memory usage info for the requested allocation. \note that the
+     *                      returned allocation may be later used/mapped with different usage.
+     *                      The allocator should layout the buffer to be optimized for this usage,
+     *                      but must support any usage. One exception: protected buffers can
+     *                      only be used in a protected scenario.
+     * \param allocation      pointer to where the allocation shall be stored on success. nullptr
+     *                      will be stored here on failure
+     *
+     * \retval C2_OK        the allocation was successful
+     * \retval C2_NO_MEMORY not enough memory to complete the allocation
+     * \retval C2_TIMED_OUT the allocation timed out
+     * \retval C2_NO_PERMISSION     no permission to complete the allocation
+     * \retval C2_BAD_VALUE width, height, format or usage are not supported (invalid) (caller error)
+     * \retval C2_UNSUPPORTED       this allocator does not support 2D allocations
+     * \retval C2_CORRUPTED some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error allocateGraphicBuffer(
+            uint32_t width __unused, uint32_t height __unused, uint32_t format __unused,
+            C2MemoryUsage usage __unused,
+            std::shared_ptr<C2GraphicAllocation> *allocation /* nonnull */) {
+        *allocation = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+    /**
+     * (Re)creates a 2D allocation from a native handle.  If successful, the allocation is stored
+     * in |allocation|. Otherwise, |allocation| is set to 'nullptr'.
+     *
+     * \param handle      the handle for the existing allocation
+     * \param allocation  pointer to where the allocation shall be stored on success. nullptr
+     *                  will be stored here on failure
+     *
+     * \retval C2_OK        the allocation was recreated successfully
+     * \retval C2_NO_MEMORY not enough memory to recreate the allocation
+     * \retval C2_TIMED_OUT the recreation timed out (unexpected)
+     * \retval C2_NO_PERMISSION     no permission to recreate the allocation
+     * \retval C2_BAD_VALUE invalid handle (caller error)
+     * \retval C2_UNSUPPORTED       this allocator does not support 2D allocations
+     * \retval C2_CORRUPTED some unknown, unrecoverable error occured during recreation (unexpected)
+     */
+    virtual C2Error recreateGraphicBuffer(
+            const C2Handle *handle __unused,
+            std::shared_ptr<C2GraphicAllocation> *allocation /* nonnull */) {
+        *allocation = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+protected:
+    C2Allocator() = default;
+
+    virtual ~C2Allocator() = default;
+};
+
+/**
+ *  Block allocators are used by components to allocate memory for output buffers. They can
+ *  support either linear (1D), circular (1D) or graphic (2D) allocations.
+ *
+ *  Never constructed on stack.
+ *
+ *  Block allocators are provided by the framework.
+ */
+class C2BlockAllocator {
+public:
+    /**
+     * Allocates a linear writeable block of given |capacity| and |usage|. If successful, the
+     * block is stored in |block|. Otherwise, |block| is set to 'nullptr'.
+     *
+     * \param capacity        the size of requested block.
+     * \param usage           the memory usage info for the requested allocation. \note that the
+     *                      returned allocation may be later used/mapped with different usage.
+     *                      The allocator shall lay out the buffer to be optimized for this usage,
+     *                      but must support any usage. One exception: protected buffers can
+     *                      only be used in a protected scenario.
+     * \param block      pointer to where the allocated block shall be stored on success. nullptr
+     *                      will be stored here on failure
+     *
+     * \retval C2_OK        the allocation was successful
+     * \retval C2_NO_MEMORY not enough memory to complete the allocation
+     * \retval C2_TIMED_OUT the allocation timed out
+     * \retval C2_NO_PERMISSION     no permission to complete the allocation
+     * \retval C2_BAD_VALUE capacity or usage are not supported (invalid) (caller error)
+     * \retval C2_UNSUPPORTED       this allocator does not support linear allocations
+     * \retval C2_CORRUPTED some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error allocateLinearBlock(
+            uint32_t capacity __unused, C2MemoryUsage usage __unused,
+            std::shared_ptr<C2LinearBlock> *block /* nonnull */) {
+        *block = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+    /**
+     * Allocates a circular writeable block of given |capacity| and |usage|. If successful, the
+     * block is stored in |block|. Otherwise, |block| is set to 'nullptr'.
+     *
+     * \param capacity        the size of requested circular block. (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param usage           the memory usage info for the requested allocation. \note that the
+     *                      returned allocation may be later used/mapped with different usage.
+     *                      The allocator shall lay out the buffer to be optimized for this usage,
+     *                      but must support any usage. One exception: protected buffers can
+     *                      only be used in a protected scenario.
+     * \param block      pointer to where the allocated block shall be stored on success. nullptr
+     *                      will be stored here on failure
+     *
+     * \retval C2_OK            the allocation was successful
+     * \retval C2_NO_MEMORY     not enough memory to complete the allocation
+     * \retval C2_TIMED_OUT     the allocation timed out
+     * \retval C2_NO_PERMISSION     no permission to complete the allocation
+     * \retval C2_BAD_VALUE     capacity or usage are not supported (invalid) (caller error)
+     * \retval C2_UNSUPPORTED   this allocator does not support circular allocations
+     * \retval C2_CORRUPTED     some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error allocateCircularBlock(
+            uint32_t capacity __unused, C2MemoryUsage usage __unused,
+            std::shared_ptr<C2CircularBlock> *block /* nonnull */) {
+        *block = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+    /**
+     * Allocates a 2D graphic block of given |width|, |height|, |format| and |usage|. If successful,
+     * the allocation is stored in |block|. Otherwise, |block| is set to 'nullptr'.
+     *
+     * \param width           the width of requested allocation (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param height          the height of requested allocation (the allocation could be slightly
+     *                      larger, e.g. to account for any system-required alignment)
+     * \param format          the pixel format of requested allocation. This could be a vendor
+     *                      specific format.
+     * \param usage           the memory usage info for the requested allocation. \note that the
+     *                      returned allocation may be later used/mapped with different usage.
+     *                      The allocator should layout the buffer to be optimized for this usage,
+     *                      but must support any usage. One exception: protected buffers can
+     *                      only be used in a protected scenario.
+     * \param block      pointer to where the allocation shall be stored on success. nullptr
+     *                      will be stored here on failure
+     *
+     * \retval C2_OK            the allocation was successful
+     * \retval C2_NO_MEMORY     not enough memory to complete the allocation
+     * \retval C2_TIMED_OUT     the allocation timed out
+     * \retval C2_NO_PERMISSION     no permission to complete the allocation
+     * \retval C2_BAD_VALUE     width, height, format or usage are not supported (invalid) (caller error)
+     * \retval C2_UNSUPPORTED   this allocator does not support 2D allocations
+     * \retval C2_CORRUPTED     some unknown, unrecoverable error occured during allocation (unexpected)
+     */
+    virtual C2Error allocateGraphicBlock(
+            uint32_t width __unused, uint32_t height __unused, uint32_t format __unused,
+            C2MemoryUsage usage __unused,
+            std::shared_ptr<C2GraphicBlock> *block /* nonnull */) {
+        *block = nullptr;
+        return C2_UNSUPPORTED;
+    }
+
+protected:
+    C2BlockAllocator() = default;
+
+    virtual ~C2BlockAllocator() = default;
+};
+
+/// @}
+
+/// \cond INTERNAL
+
+/// \todo These are no longer used
+
+/// \addtogroup linear
+/// @{
+
+/** \deprecated */
+class C2LinearBuffer
+    : public C2Buffer, public _C2LinearRangeAspect,
+      public std::enable_shared_from_this<C2LinearBuffer> {
+public:
+    /** \todo what is this? */
+    const C2Handle *handle() const;
+
+protected:
+    inline C2LinearBuffer(const C2ConstLinearBlock &block);
+
+private:
+    class Impl;
+    Impl *mImpl;
+};
+
+class C2ReadCursor;
+
+class C2WriteCursor {
+public:
+    uint32_t remaining() const; // remaining data to be read
+    void commit(); // commits the current position. discard data before current position
+    void reset() const;  // resets position to the last committed position
+    // slices off at most |size| bytes, and moves cursor ahead by the number of bytes
+    // sliced off.
+    C2ReadCursor slice(uint32_t size) const;
+    // slices off at most |size| bytes, and moves cursor ahead by the number of bytes
+    // sliced off.
+    C2WriteCursor reserve(uint32_t size);
+    // bool read(T&);
+    // bool write(T&);
+    C2Fence waitForSpace(uint32_t size);
+};
+
+/// @}
+
+/// \addtogroup graphic
+/// @{
+
+struct C2ColorSpace {
+//public:
+    enum Standard {
+        BT601,
+        BT709,
+        BT2020,
+        // TODO
+    };
+
+    enum Range {
+        LIMITED,
+        FULL,
+        // TODO
+    };
+
+    enum TransferFunction {
+        BT709Transfer,
+        BT2020Transfer,
+        HybridLogGamma2,
+        HybridLogGamma4,
+        // TODO
+    };
+};
+
+/** \deprecated */
+class C2GraphicBuffer : public C2Buffer {
+public:
+    // constant attributes
+    inline uint32_t width() const  { return mWidth; }
+    inline uint32_t height() const { return mHeight; }
+    inline uint32_t format() const { return mFormat; }
+    inline const C2MemoryUsage usage() const { return mUsage; }
+
+    // modifiable attributes
+
+
+    virtual const C2ColorSpace colorSpace() const = 0;
+    // best effort
+    virtual void setColorSpace_be(const C2ColorSpace &colorSpace) = 0;
+    virtual bool setColorSpace(const C2ColorSpace &colorSpace) = 0;
+
+    const C2Handle *handle() const;
+
+protected:
+    uint32_t mWidth;
+    uint32_t mHeight;
+    uint32_t mFormat;
+    C2MemoryUsage mUsage;
+
+    class Impl;
+    Impl *mImpl;
+};
+
+/// @}
+
+/// \endcond
+
+/// @}
+
+}  // namespace android
+
+#endif  // C2BUFFER_H_
diff --git a/media/libstagefright/codec2/include/C2Component.h b/media/libstagefright/codec2/include/C2Component.h
new file mode 100644
index 0000000..1ee9302
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2Component.h
@@ -0,0 +1,685 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2COMPONENT_H_
+
+#define C2COMPONENT_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <list>
+#include <memory>
+#include <vector>
+#include <functional>
+
+#include <C2Param.h>
+#include <C2Work.h>
+
+namespace android {
+
+/// \defgroup components Components
+/// @{
+
+class C2Component;
+
+class C2ComponentListener {
+public:
+    virtual void onWorkDone(std::weak_ptr<C2Component> component,
+                            std::vector<std::unique_ptr<C2Work>> workItems) = 0;
+
+    virtual void onTripped(std::weak_ptr<C2Component> component,
+                           std::vector<std::shared_ptr<C2SettingResult>> settingResult) = 0;
+
+    virtual void onError(std::weak_ptr<C2Component> component,
+                         uint32_t errorCode) = 0;
+
+    // virtual void onTunnelReleased(<from>, <to>) = 0;
+
+    // virtual void onComponentReleased(<id>) = 0;
+
+protected:
+    virtual ~C2ComponentListener();
+};
+
+/**
+ * Component interface object. This object contains all of the configuration of a potential or
+ * actual component. It can be created and used independently of an actual C2Component instance to
+ * query support and parameters for various component settings and configurations for a potential
+ * component. Actual components also expose this interface.
+ */
+
+class C2ComponentInterface {
+public:
+    // ALWAYS AVAILABLE METHODS
+    // =============================================================================================
+
+    /**
+     * Returns the name of this component or component interface object.
+     * This is a unique name for this component or component interface 'class'; however, multiple
+     * instances of this component SHALL have the same name.
+     *
+     * This method MUST be supported in any state. This call does not change the state nor the
+     * internal states of the component.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \return the name of this component or component interface object.
+     * \retval an empty string if there was not enough memory to allocate the actual name.
+     */
+    virtual C2String getName() const = 0;
+
+    /**
+     * Returns a unique ID for this component or interface object.
+     * This ID is used as work targets, unique work IDs, and when configuring tunneling.
+     *
+     * This method MUST be supported in any state. This call does not change the state nor the
+     * internal states of the component.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \return a unique node ID for this component or component interface instance.
+     */
+    virtual node_id getId() const = 0;
+
+    /**
+     * Queries a set of parameters from the component or interface object.
+     * Querying is performed at best effort: the component SHALL query all supported parameters and
+     * skip unsupported ones, or heap allocated parameters that could not be allocated. Any errors
+     * are communicated in the return value. Additionally, preallocated (e.g. stack) parameters that
+     * could not be queried are invalidated. Parameters to be allocated on the heap are omitted from
+     * the result.
+     *
+     * \note Parameter values do not depend on the order of query.
+     *
+     * \todo This method cannot be used to query info-buffers. Is that a problem?
+     *
+     * This method MUST be supported in any state. This call does not change the state nor the
+     * internal states of the component.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \param[in,out] stackParams   a list of params queried. These are initialized specific to each
+     *                      setting; e.g. size and index are set and rest of the members are
+     *                      cleared.
+     *                      \note Flexible settings that are of incorrect size will be invalidated.
+     * \param[in] heapParamIndices a vector of param indices for params to be queried and returned on the
+     *                      heap. These parameters will be returned in heapParams. Unsupported param
+     *                      indices will be ignored.
+     * \param[out] heapParams    a list of params where to which the supported heap parameters will be
+     *                      appended in the order they appear in heapParamIndices.
+     *
+     * \retval C2_OK        all parameters could be queried
+     * \retval C2_BAD_INDEX all supported parameters could be queried, but some parameters were not
+     *                      supported
+     * \retval C2_NO_MEMORY could not allocate memory for a supported parameter
+     * \retval C2_CORRUPTED some unknown error prevented the querying of the parameters
+     *                      (unexpected)
+     */
+    virtual status_t query_nb(
+        const std::vector<C2Param* const> &stackParams,
+        const std::vector<C2Param::Index> &heapParamIndices,
+        std::vector<std::unique_ptr<C2Param>>* const heapParams) const = 0;
+
+    /**
+     * Sets a set of parameters for the component or interface object.
+     * Tuning is performed at best effort: the component SHALL update all supported configuration at
+     * best effort (unless configured otherwise) and skip unsupported ones. Any errors are
+     * communicated in the return value and in |failures|.
+     *
+     * \note Parameter tuning DOES depend on the order of the tuning parameters. E.g. some parameter
+     * update may allow some subsequent parameter update.
+     *
+     * This method MUST be supported in any state.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \param[in,out] params          a list of parameter updates. These will be updated to the actual
+     *                      parameter values after the updates (this is because tuning is performed
+     *                      at best effort).
+     *                      \todo params that could not be updated are not marked here, so are
+     *                      confusing - are they "existing" values or intended to be configured
+     *                      values?
+     * \param[out] failures        a list of parameter failures
+     *
+     * \retval C2_OK        all parameters could be updated successfully
+     * \retval C2_BAD_INDEX all supported parameters could be updated successfully, but some
+     *                      parameters were not supported
+     * \retval C2_BAD_VALUE some supported parameters could not be updated successfully because
+     *                      they contained unsupported values. These are returned in |failures|.
+     * \retval C2_NO_MEMORY some supported parameters could not be updated successfully because
+     *                      they contained unsupported values, but could not allocate a failure
+     *                      object for them.
+     * \retval C2_CORRUPTED some unknown error prevented the update of the parameters
+     *                      (unexpected)
+     */
+    virtual status_t config_nb(
+            const std::vector<C2Param* const> &params,
+            std::vector<std::unique_ptr<C2SettingResult>>* const failures) = 0;
+
+    /**
+     * Atomically sets a set of parameters for the component or interface object.
+     *
+     * \note This method is used mainly for reserving resources for a component.
+     *
+     * The component SHALL update all supported configuration at
+     * best effort(TBD) (unless configured otherwise) and skip unsupported ones. Any errors are
+     * communicated in the return value and in |failures|.
+     *
+     * \note Parameter tuning DOES depend on the order of the tuning parameters. E.g. some parameter
+     * update may allow some subsequent parameter update.
+     *
+     * This method MUST be supported in any state.
+     *
+     * This method may be momentarily blocking, but MUST return within 5ms.
+     *
+     * \param params[in,out]          a list of parameter updates. These will be updated to the actual
+     *                      parameter values after the updates (this is because tuning is performed
+     *                      at best effort).
+     *                      \todo params that could not be updated are not marked here, so are
+     *                      confusing - are they "existing" values or intended to be configured
+     *                      values?
+     * \param failures[out]        a list of parameter failures
+     *
+     * \retval C2_OK        all parameters could be updated successfully
+     * \retval C2_BAD_INDEX all supported parameters could be updated successfully, but some
+     *                      parameters were not supported
+     * \retval C2_BAD_VALUE some supported parameters could not be updated successfully because
+     *                      they contained unsupported values. These are returned in |failures|.
+     * \retval C2_NO_MEMORY some supported parameters could not be updated successfully because
+     *                      they contained unsupported values, but could not allocate a failure
+     *                      object for them.
+     * \retval C2_CORRUPTED some unknown error prevented the update of the parameters
+     *                      (unexpected)
+     */
+    virtual status_t commit_sm(
+            const std::vector<C2Param* const> &params,
+            std::vector<std::unique_ptr<C2SettingResult>>* const failures) = 0;
+
+    // TUNNELING
+    // =============================================================================================
+
+    /**
+     * Creates a tunnel from this component to the target component.
+     *
+     * If the component is successfully created, subsequent work items queued may include a
+     * tunneled path between these components.
+     *
+     * This method MUST be supported in any state.
+     *
+     * This method may be momentarily blocking, but MUST return within 5ms.
+     *
+     * \retval C2_OK        the tunnel was successfully created
+     * \retval C2_BAD_INDEX the target component does not exist
+     * \retval C2_ALREADY_EXIST the tunnel already exists
+     * \retval C2_UNSUPPORTED  the tunnel is not supported
+     *
+     * \retval C2_TIMED_OUT could not create the tunnel within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the creation of the tunnel (unexpected)
+     */
+    virtual status_t createTunnel_sm(node_id targetComponent) = 0;
+
+    /**
+     * Releases a tunnel from this component to the target component.
+     *
+     * The release of a tunnel is delayed while there are pending work items for the tunnel.
+     * After releasing a tunnel, subsequent work items queued MUST NOT include a tunneled
+     * path between these components.
+     *
+     * This method MUST be supported in any state.
+     *
+     * This method may be momentarily blocking, but MUST return within 5ms.
+     *
+     * \retval C2_OK        the tunnel was marked for release successfully
+     * \retval C2_BAD_INDEX the target component does not exist
+     * \retval C2_NOT_FOUND the tunnel does not exist
+     *
+     * \retval C2_TIMED_OUT could not mark the tunnel for release within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the release of the tunnel (unexpected)
+     */
+    virtual status_t releaseTunnel_sm(node_id targetComponent) = 0;
+
+
+    // REFLECTION MECHANISM (USED FOR EXTENSION)
+    // =============================================================================================
+
+    /**
+     * Returns the parameter reflector.
+     *
+     * This is used to describe parameter fields.
+     *
+     * \return a shared parameter reflector object.
+     */
+    virtual std::shared_ptr<C2ParamReflector> getParamReflector() const = 0;
+
+    /**
+     * Returns the set of supported parameters.
+     *
+     * \param[out] params a vector of supported parameters will be appended to this vector.
+     *
+     * \retval C2_OK        the operation completed successfully.
+     * \retval C2_NO_MEMORY not enough memory to complete this method.
+     */
+    virtual status_t getSupportedParams(
+            std::vector<std::shared_ptr<C2ParamDescriptor>> * const params) const = 0;
+
+    /**
+     *
+     * \todo should this take a list considering that setting some fields may further limit other
+     * fields in the same list?
+     */
+    virtual status_t getSupportedValues(
+            const std::vector<const C2ParamField> fields,
+            std::vector<C2FieldSupportedValues>* const values) const = 0;
+
+    virtual ~C2ComponentInterface() = default;
+};
+
+class C2Component {
+public:
+    // METHODS AVAILABLE WHEN RUNNING
+    // =============================================================================================
+
+    /**
+     * Queues up work for the component.
+     *
+     * This method MUST be supported in running (including tripped) states.
+     *
+     * This method MUST be "non-blocking" and return within 1ms
+     *
+     * It is acceptable for this method to return OK and return an error value using the
+     * onWorkDone() callback.
+     *
+     * \retval C2_OK        the work was successfully queued
+     * \retval C2_BAD_INDEX some component(s) in the work do(es) not exist
+     * \retval C2_UNSUPPORTED  the components are not tunneled
+     *
+     * \retval C2_NO_MEMORY not enough memory to queue the work
+     * \retval C2_CORRUPTED some unknown error prevented queuing the work (unexpected)
+     */
+    virtual status_t queue_nb(std::list<std::unique_ptr<C2Work>>* const items) = 0;
+
+    /**
+     * Announces a work to be queued later for the component. This reserves a slot for the queue
+     * to ensure correct work ordering even if the work is queued later.
+     *
+     * This method MUST be supported in running (including tripped) states.
+     *
+     * This method MUST be "non-blocking" and return within 1 ms
+     *
+     * \retval C2_OK        the work announcement has been successfully recorded
+     * \retval C2_BAD_INDEX some component(s) in the work outline do(es) not exist
+     * \retval C2_UNSUPPORTED  the componentes are not tunneled
+     *
+     * \retval C2_NO_MEMORY not enough memory to record the work announcement
+     * \retval C2_CORRUPTED some unknown error prevented recording the announcement (unexpected)
+     *
+     * \todo Can this be rolled into queue_nb?
+     */
+    virtual status_t announce_nb(const std::vector<C2WorkOutline> &items) = 0;
+
+    /**
+     * Discards and abandons any pending work for the component, and optionally any component
+     * downstream.
+     *
+     * \todo define this: we could flush all work before last item queued for component across all
+     *                    components linked to this; flush only work items that are queued to this
+     *                    component
+     * \todo return work # of last flushed item; or all flushed (but not returned items)
+     * \todo we could make flush take a work item and flush all work before/after that item to allow
+     *       TBD (slicing/seek?)
+     * \todo we could simply take a list of numbers and flush those... this is bad for decoders
+     *       also, what would happen to fine grade references?
+     *
+     * This method MUST be supported in running (including tripped) states.
+     *
+     * This method may be momentarily blocking, but must return within 5ms.
+     *
+     * Work that could be immediately abandoned/discarded SHALL be returned in |flushedWork|; this
+     * can be done in an arbitrary order.
+     *
+     * Work that could not be abandoned or discarded immediately SHALL be marked to be
+     * discarded at the earliest opportunity, and SHALL be returned via the onWorkDone() callback.
+     *
+     * \param flushThrough    flush work from this component and all components connected downstream
+     *                      from it via tunneling.
+     *
+     * \retval C2_OK        the work announcement has been successfully recorded
+     * \retval C2_TIMED_OUT the flush could not be completed within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented flushing from completion (unexpected)
+     */
+    virtual status_t flush_sm(bool flushThrough, std::list<std::unique_ptr<C2Work>>* const flushedWork) = 0;
+
+    /**
+     * Drains the component, and optionally downstream components
+     *
+     * \todo define this; we could place EOS to all upstream components, just this component, or
+     *       all upstream and downstream component.
+     * \todo should EOS carry over to downstream components?
+     *
+     * Marks last work item as "end-of-stream", so component is notified not to wait for further
+     * work before it processes work already queued. This method is called to set the end-of-stream
+     * flag after work has been queued. Client can continue to queue further work immediately after
+     * this method returns.
+     *
+     * This method MUST be supported in running (including tripped) states.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * Work that is completed SHALL be returned via the onWorkDone() callback.
+     *
+     * \param drainThrough    marks the last work item with a persistent "end-of-stream" marker that
+     *                      will drain downstream components.
+     *
+     * \todo this may confuse work-ordering downstream; could be an mode enum
+     *
+     * \retval C2_OK        the work announcement has been successfully recorded
+     * \retval C2_TIMED_OUT the flush could not be completed within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented flushing from completion (unexpected)
+     */
+    virtual status_t drain_nb(bool drainThrough) = 0;
+
+    // STATE CHANGE METHODS
+    // =============================================================================================
+
+    /**
+     * Starts the component.
+     *
+     * This method MUST be supported in stopped state.
+     *
+     * \todo This method MUST return within 500ms. Seems this should be able to return quickly, as
+     * there are no immediate guarantees. Though there are guarantees for responsiveness immediately
+     * after start returns.
+     *
+     * \todo Could we just start a ComponentInterface to get a Component?
+     *
+     * \retval C2_OK        the work announcement has been successfully recorded
+     * \retval C2_NO_MEMORY not enough memory to start the component
+     * \retval C2_TIMED_OUT the component could not be started within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented starting the component (unexpected)
+     */
+    virtual status_t start() = 0;
+
+    /**
+     * Stops the component.
+     *
+     * This method MUST be supported in running (including tripped) state.
+     *
+     * This method MUST return withing 500ms.
+     *
+     * Upon this call, all pending work SHALL be abandoned.
+     *
+     * \todo should this return completed work, since client will just free it? Perhaps just to
+     * verify accounting.
+     *
+     * This does not alter any settings and tunings that may have resulted in a tripped state.
+     * (Is this material given the definition? Perhaps in case we want to start again.)
+     */
+    virtual status_t stop() = 0;
+
+    /**
+     * Resets the component.
+     *
+     * This method MUST be supported in running (including tripped) state.
+     *
+     * This method MUST be supported during any other call (\todo or just blocking ones?)
+     *
+     * This method MUST return withing 500ms.
+     *
+     * After this call returns all work is/must be abandoned, all references should be released.
+     *
+     * \todo should this return completed work, since client will just free it? Also, if it unblocks
+     * a stop, where should completed work be returned?
+     *
+     * This brings settings back to their default - "guaranteeing" no tripped space.
+     *
+     * \todo reclaim support - it seems that since ownership is passed, this will allow reclaiming stuff.
+     */
+    virtual void reset() = 0;
+
+    /**
+     * Releases the component.
+     *
+     * This method MUST be supported in any state. (\todo Or shall we force reset() first to bring
+     * to a known state?)
+     *
+     * This method MUST return withing 500ms.
+     *
+     * \todo should this return completed work, since client will just free it? Also, if it unblocks
+     * a stop, where should completed work be returned?
+     *
+     * TODO: does it matter if this call has a short time limit? Yes, as upon return all references
+     * shall be abandoned.
+     */
+    virtual void release() = 0;
+
+    /**
+     * Returns the interface for this component.
+     *
+     * \return the component interface
+     */
+    virtual std::shared_ptr<C2ComponentInterface> intf() = 0;
+
+protected:
+    virtual ~C2Component() = default;
+};
+
+class C2FrameInfoParser {
+public:
+    /**
+     * \return the content type supported by this info parser.
+     *
+     * \todo this may be redundant
+     */
+    virtual C2StringLiteral getType() const = 0;
+
+    /**
+     * \return a vector of supported parameter indices parsed by this info parser.
+     *
+     * \todo sticky vs. non-sticky params? this may be communicated by param-reflector.
+     */
+    virtual const std::vector<C2Param::Index> getParsedParams() const = 0;
+
+    /**
+     * Resets this info parser. This brings this parser to its initial state after creation.
+     *
+     * This method SHALL return within 5ms.
+     *
+     * \retval C2_OK        the info parser was reset
+     * \retval C2_TIMED_OUT could not reset the parser within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the resetting of the parser (unexpected)
+     */
+    virtual status_t reset() { return C2_OK; }
+
+    virtual status_t parseFrame(C2BufferPack &frame);
+
+    virtual ~C2FrameInfoParser() = default;
+};
+
+struct C2ComponentInfo {
+    // TBD
+
+};
+
+class C2AllocatorStore {
+public:
+    // TBD
+
+    enum Type {
+        LINEAR,     ///< basic linear allocator type
+        GRALLOC,    ///< basic gralloc allocator type
+    };
+
+    /**
+     * Creates an allocator.
+     *
+     * \param type      the type of allocator to create
+     * \param allocator shared pointer where the created allocator is stored. Cleared on failure
+     *                  and updated on success.
+     *
+     * \retval C2_OK        the allocator was created successfully
+     * \retval C2_TIMED_OUT could not create the allocator within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the creation of the allocator (unexpected)
+     *
+     * \retval C2_NOT_FOUND no such allocator
+     * \retval C2_NO_MEMORY not enough memory to create the allocator
+     */
+    virtual status_t createAllocator(Type type, std::shared_ptr<C2Allocator>* const allocator) = 0;
+
+    virtual ~C2AllocatorStore() = default;
+};
+
+class C2ComponentStore {
+    /**
+     * Creates a component.
+     *
+     * This method SHALL return within 100ms.
+     *
+     * \param name          name of the component to create
+     * \param component     shared pointer where the created component is stored. Cleared on
+     *                      failure and updated on success.
+     *
+     * \retval C2_OK        the component was created successfully
+     * \retval C2_TIMED_OUT could not create the component within the time limit (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the creation of the component (unexpected)
+     *
+     * \retval C2_NOT_FOUND no such component
+     * \retval C2_NO_MEMORY not enough memory to create the component
+     */
+    virtual status_t createComponent(C2String name, std::shared_ptr<C2Component>* const component);
+
+    /**
+     * Creates a component interface.
+     *
+     * This method SHALL return within 100ms.
+     *
+     * \param name          name of the component interface to create
+     * \param interface     shared pointer where the created interface is stored
+     *
+     * \retval C2_OK        the component interface was created successfully
+     * \retval C2_TIMED_OUT could not create the component interface within the time limit
+     *                      (unexpected)
+     * \retval C2_CORRUPTED some unknown error prevented the creation of the component interface
+     *                      (unexpected)
+     *
+     * \retval C2_NOT_FOUND no such component interface
+     * \retval C2_NO_MEMORY not enough memory to create the component interface
+     *
+     * \todo Do we need an interface, or could this just be a component that is never started?
+     */
+    virtual status_t createInterface(C2String name, std::shared_ptr<C2ComponentInterface>* const interface);
+
+    /**
+     * Returns the list of components supported by this component store.
+     *
+     * This method SHALL return within 1ms.
+     *
+     * \retval vector of component information.
+     */
+    virtual std::vector<std::unique_ptr<const C2ComponentInfo>> getComponents();
+
+    // -------------------------------------- UTILITY METHODS --------------------------------------
+
+    // on-demand buffer layout conversion (swizzling)
+    virtual status_t copyBuffer(std::shared_ptr<C2GraphicBuffer> src, std::shared_ptr<C2GraphicBuffer> dst);
+
+    // status_t selectPreferredColor(formats<A>, formats<B>);
+
+    // GLOBAL SETTINGS
+    // system-wide stride & slice-height (???)
+
+    /**
+     * Queries a set of system-wide parameters.
+     * Querying is performed at best effort: the store SHALL query all supported parameters and
+     * skip unsupported ones, or heap allocated parameters that could not be allocated. Any errors
+     * are communicated in the return value. Additionally, preallocated (e.g. stack) parameters that
+     * could not be queried are invalidated. Parameters to be allocated on the heap are omitted from
+     * the result.
+     *
+     * \note Parameter values do not depend on the order of query.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \param stackParams     a list of params queried. These are initialized specific to each
+     *                      setting; e.g. size and index are set and rest of the members are
+     *                      cleared.
+     *                      NOTE: Flexible settings that are of incorrect size will be invalidated.
+     * \param heapParamIndices a vector of param indices for params to be queried and returned on the
+     *                      heap. These parameters will be returned in heapParams. Unsupported param
+     *                      indices will be ignored.
+     * \param heapParams      a list of params where to which the supported heap parameters will be
+     *                      appended in the order they appear in heapParamIndices.
+     *
+     * \retval C2_OK        all parameters could be queried
+     * \retval C2_BAD_INDEX all supported parameters could be queried, but some parameters were not
+     *                      supported
+     * \retval C2_NO_MEMORY could not allocate memory for a supported parameter
+     * \retval C2_CORRUPTED some unknown error prevented the querying of the parameters
+     *                      (unexpected)
+     */
+    virtual status_t query_nb(
+        const std::vector<C2Param* const> &stackParams,
+        const std::vector<C2Param::Index> &heapParamIndices,
+        std::vector<std::unique_ptr<C2Param>>* const heapParams) = 0;
+
+    /**
+     * Sets a set of system-wide parameters.
+     *
+     * \note There are no settable system-wide parameters defined thus far, but may be added in the
+     * future.
+     *
+     * Tuning is performed at best effort: the store SHALL update all supported configuration at
+     * best effort (unless configured otherwise) and skip unsupported ones. Any errors are
+     * communicated in the return value and in |failures|.
+     *
+     * \note Parameter tuning DOES depend on the order of the tuning parameters. E.g. some parameter
+     * update may allow some subsequent parameter update.
+     *
+     * This method MUST be "non-blocking" and return within 1ms.
+     *
+     * \param params          a list of parameter updates. These will be updated to the actual
+     *                      parameter values after the updates (this is because tuning is performed
+     *                      at best effort).
+     *                      \todo params that could not be updated are not marked here, so are
+     *                      confusing - are they "existing" values or intended to be configured
+     *                      values?
+     * \param failures        a list of parameter failures
+     *
+     * \retval C2_OK        all parameters could be updated successfully
+     * \retval C2_BAD_INDEX all supported parameters could be updated successfully, but some
+     *                      parameters were not supported
+     * \retval C2_BAD_VALUE some supported parameters could not be updated successfully because
+     *                      they contained unsupported values. These are returned in |failures|.
+     * \retval C2_NO_MEMORY some supported parameters could not be updated successfully because
+     *                      they contained unsupported values, but could not allocate a failure
+     *                      object for them.
+     * \retval C2_CORRUPTED some unknown error prevented the update of the parameters
+     *                      (unexpected)
+     */
+    virtual status_t config_nb(
+            const std::vector<C2Param* const> &params,
+            std::list<std::unique_ptr<C2SettingResult>>* const failures) = 0;
+
+    virtual ~C2ComponentStore() = default;
+};
+
+// ================================================================================================
+
+/// @}
+
+}  // namespace android
+
+#endif  // C2COMPONENT_H_
diff --git a/media/libstagefright/codec2/include/C2Config.h b/media/libstagefright/codec2/include/C2Config.h
new file mode 100644
index 0000000..30e9193
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2Config.h
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2CONFIG_H_
+#define C2CONFIG_H_
+
+#include <C2ParamDef.h>
+
+namespace android {
+
+/// \defgroup config Component configuration
+/// @{
+
+#ifndef DEFINE_C2_ENUM_VALUE_AUTO_HELPER
+#define DEFINE_C2_ENUM_VALUE_AUTO_HELPER(name, type, prefix, ...)
+#define DEFINE_C2_ENUM_VALUE_CUSTOM_HELPER(name, type, names, ...)
+#endif
+
+#define C2ENUM(name, type, ...) \
+enum name : type { __VA_ARGS__ }; \
+DEFINE_C2_ENUM_VALUE_AUTO_HELPER(name, type, NULL, __VA_ARGS__)
+
+#define C2ENUM_CUSTOM_PREFIX(name, type, prefix, ...) \
+enum name : type { __VA_ARGS__ }; \
+DEFINE_C2_ENUM_VALUE_AUTO_HELPER(name, type, prefix, __VA_ARGS__)
+
+#define C2ENUM_CUSTOM_NAMES(name, type, names, ...) \
+enum name : type { __VA_ARGS__ }; \
+DEFINE_C2_ENUM_VALUE_CUSTOM_HELPER(name, type, names, __VA_ARGS__)
+
+enum C2ParamIndexKind : uint32_t {
+    /// domain
+    kParamIndexDomain,
+
+    /// configuration descriptors
+    kParamIndexSupportedParams,
+    kParamIndexRequiredParams,
+    kParamIndexReadOnlyParams,
+    kParamIndexRequestedInfos,
+
+    /// latency
+    kParamIndexLatency,
+
+    // generic time behavior
+    kParamIndexTemporal,
+
+    /// port configuration
+    kParamIndexMime,
+    kParamIndexStreamCount,
+    kParamIndexFormat,
+
+    // video info
+
+    kParamIndexStructStart = 0x1,
+    kParamIndexVideoSize,
+    kParamIndexMaxVideoSizeHint,
+
+    kParamIndexParamStart = 0x800,
+};
+
+C2ENUM(C2DomainKind, int32_t,
+    C2DomainVideo,
+    C2DomainAudio,
+    C2DomainOther = C2DomainAudio + 1
+);
+
+// read-only
+
+typedef C2GlobalParam<C2Info, C2SimpleValueStruct<C2DomainKind>, kParamIndexDomain> C2ComponentDomainInfo;
+// typedef C2GlobalParam<C2Info, C2Uint32Value, kParamIndexDomain> C2ComponentDomainInfo;
+//DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<C2DomainKind>, { C2FIELD(mValue, "value") });
+
+// read-only
+typedef C2GlobalParam<C2Info, C2Uint32Array, kParamIndexSupportedParams> C2SupportedParamsInfo;
+
+/// \todo do we define it as a param?
+// read-only
+typedef C2GlobalParam<C2Info, C2Uint32Array, kParamIndexRequiredParams> C2RequiredParamsInfo;
+
+// read-only
+typedef C2GlobalParam<C2Info, C2Uint32Array, kParamIndexReadOnlyParams> C2ReadOnlyParamsInfo;
+
+// read-only
+typedef C2GlobalParam<C2Info, C2Uint32Array, kParamIndexRequestedInfos> C2RequestedInfosInfo;
+
+// read-only
+//typedef C2GlobalParam<C2Info, C2Uint32Value, kParamIndexRequestedInfos> C2RequestedInfosInfo;
+
+/// latency
+
+typedef C2PortParam<C2Info, C2Uint32Value, kParamIndexLatency> C2PortLatencyInfo;
+
+typedef C2GlobalParam<C2Info, C2Uint32Value, kParamIndexLatency> C2ComponentLatencyInfo;
+
+/// \todo
+typedef C2GlobalParam<C2Info, C2Uint32Value, kParamIndexTemporal> C2ComponentTemporalInfo;
+
+/// port configuration
+
+typedef C2PortParam<C2Tuning, C2StringValue, kParamIndexMime> C2PortMimeConfig;
+
+typedef C2PortParam<C2Tuning, C2Uint32Value, kParamIndexStreamCount> C2PortStreamCountConfig;
+
+typedef C2StreamParam<C2Tuning, C2StringValue, kParamIndexMime> C2StreamMimeConfig;
+
+C2ENUM(C2FormatKind, uint32_t,
+    C2FormatCompressed,
+    C2FormatAudio = 1,
+    C2FormatVideo = 4,
+)
+
+typedef C2StreamParam<C2Tuning, C2Uint32Value, kParamIndexFormat> C2StreamFormatConfig;
+
+/*
+   Component description fields:
+
+// format (video/compressed/audio/other-do we need other?) per stream
+
+// likely some of these are exposed as separate settings:
+
+struct C2BaseTuning {
+    // latency characteristics
+    uint32_t latency;
+    bool temporal;               // seems this only makes sense if latency is 1..., so this could be captured as latency = 0
+    uint32_t delay;
+
+    uint32_t numInputStreams;    // RW? - or suggestion only: RO
+    uint32_t numOutputStreams;   // RW
+                                 //
+    // refs characteristics (per stream?)
+    uint32_t maxInputRefs;       // RO
+    uint32_t maxOutputRefs;      // RO
+    uint32_t maxInputMemory;     // RO - max time refs are held for
+    uint32_t maxOutputMemory;    // RO
+
+    // per stream
+    bool compressed;
+    // format... video/compressed/audio/other?
+    // actual "audio/video" format type
+    uint32_t width/height? is this needed, or just queue...
+    // mime...
+};
+*/
+
+
+
+
+
+
+// overall component
+//   => C: domain: audio or video
+//   => C: kind: decoder, encoder or filter
+//   => "mime" class
+
+//   => C: temporal (bool) => does this depend on ordering?
+//   => I: latency
+//   => I: history max duration...
+//   => I: history max frames kept...
+//   => I: reordering depth
+//   => I: frc (bool) (perhaps ratio?)
+//   => I: current frc
+
+//   - pause
+//   => last frame 'number' processed
+//   => current frame 'number' processed
+//   => invalid settings =>[]
+
+// video decoder configuration:                                 // audio
+//   - encoding                                                 // -encoding
+//   - hint: max width/height                                   // -hint: sample rate, channels
+//   - hint: profile/level                                      // -hint: tools used
+//   - hint: framerate (bitrate?)                               // -hint: bitrate
+//   - default: color space (from container)
+//   - hint: color format                                       // -hint: pcm-encoding
+//   - hint: # of views (e.g. MVC)                              // -hint?: channel groups
+//   - default: HDR static info (from container)                // -hint?: channel mappings
+//   - hint: rotation (e.g. for allocator)
+
+// => # of streams required and their formats? (setting?)
+// => # of streams produced and their formats? (tuning)
+
+// => output
+//   - # of views                                               // -channel groups && channel mappings
+//   - width/height/crop/color format/color space/HDR static info (from buffers)
+//     (as required by the allocator & framework)
+//   - SEI (or equivalent) <= [port]
+//     - CC
+//   - reference info
+
+// video encoder configurations
+//   - encoding                                                 // - encoding
+//   - hint: width/height                                       // - hint: sample rate, channels
+//   - hint: frame rate
+//   - hint: max width/height (? does this differ from width/height?)
+//   - # of input (e.g. MVC)                                    // - hint: # groups and mappings
+//   - # of output (e.g. SVC) => bitrates/width/height/framerates? per stream
+//   - hint: profile/level                                      // - hint: profile/level
+//   - HDR static info + (info: HDR)
+//   - color space
+//   - hint: color format?                                      // - hint: pcm encoding
+//   - SEI
+//     - CC
+//   - reference directive
+//   - hint: bitrate (or quality)                               // - hint: bitrate/quality
+//   - optional: codec-specific parameters                      // - optional: csd
+
+// => output                                                    // => output
+//   - layers per stream?                                       // E-AC3?... DTS?...Dolby-Vision?
+//   - reference info
+
+
+// RM:
+//   - need SPS for full knowledge => component should return max. (component can use less)
+//   - critical parameters? (interlaced? profile? level?)
+
+struct C2VideoSizeStruct {
+    int32_t mWidth;     ///< video width
+    int32_t mHeight;    ///< video height
+
+    DEFINE_AND_DESCRIBE_C2STRUCT(VideoSize)
+    C2FIELD(mWidth, "width")
+    C2FIELD(mHeight, "height")
+};
+
+// video size for video decoder [OUT]
+typedef C2StreamParam<C2Info, C2VideoSizeStruct> C2VideoSizeStreamInfo;
+
+// max video size for video decoder [IN]
+typedef C2PortParam<C2Setting, C2VideoSizeStruct, kParamIndexMaxVideoSizeHint> C2MaxVideoSizeHintPortSetting;
+
+// video encoder size [IN]
+typedef C2StreamParam<C2Tuning, C2VideoSizeStruct> C2VideoSizeStreamTuning;
+
+/// @}
+
+} // namespace android
+
+#endif
diff --git a/media/libstagefright/codec2/include/C2Param.h b/media/libstagefright/codec2/include/C2Param.h
new file mode 100644
index 0000000..fd43061
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2Param.h
@@ -0,0 +1,1171 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2PARAM_H_
+#define C2PARAM_H_
+
+#include <C2.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <algorithm>
+#include <list>
+#include <string>
+#include <type_traits>
+
+#define C2_PACK __attribute__((packed))
+
+namespace android {
+
+/// \addtogroup Parameters
+/// @{
+
+/// \defgroup internal Internal helpers.
+
+/*!
+ * \file
+ * PARAMETERS: SETTINGs, TUNINGs, and INFOs
+ * ===
+ *
+ * These represent miscellaneous control and metadata information and are likely copied into
+ * kernel space. Therefore, these are C-like structures designed to carry just a small amount of
+ * information. We are using C++ to be able to add constructors, as well as non-virtual and class
+ * methods.
+ *
+ * ==Specification details:
+ *
+ * Restrictions:
+ *   - must be POD struct, e.g. no vtable (no virtual destructor)
+ *   - must have the same size in 64-bit and 32-bit mode (no size_t)
+ *   - as such, no pointer members
+ *
+ * Behavior:
+ * - Params can be global (not related to input or output), related to input or output,
+ *   or related to an input/output stream.
+ * - All params are queried/set using a unique param index, which incorporates a potential stream
+ *   index and/or port.
+ * - Querying (supported) params MUST never fail.
+ * - All params MUST have default values.
+ * - If some fields have "unsupported" or "invalid" values during setting, this SHOULD be
+ *   communicated to the app.
+ *   a) Ideally, this should be avoided.  When setting parameters, in general, component should do
+ *     "best effort" to apply all settings. It should change "invalid/unsupported" values to the
+ *     nearest supported values.
+ *   - This is communicated to the client by changing the source values in tune()/
+ *     configure().
+ *   b) If falling back to a supported value is absolutely impossible, the component SHALL return
+ *     an error for the specific setting, but should continue to apply other settings.
+ *     TODO: this currently may result in unintended results.
+ *
+ * **NOTE:** unlike OMX, params are not versioned. Instead, a new struct with new base index
+ * SHALL be added as new versions are required.
+ *
+ * The proper subtype (Setting, Info or Param) is incorporated into the class type. Define structs
+ * to define multiple subtyped versions of related parameters.
+ *
+ * ==Implementation details:
+ *
+ * - Use macros to define parameters
+ * - All parameters must have a default constructor
+ *   - This is only used for instantiating the class in source (e.g. will not be used
+ *     when building a parameter by the framework from key/value pairs.)
+ */
+
+/// \ingroup internal
+struct _C2ParamManipulator;
+
+/**
+ * Parameter base class.
+ */
+struct C2Param {
+    // param index encompasses the following:
+    //
+    // - type (setting, tuning, info, struct)
+    // - vendor extension flag
+    // - flexible parameter flag
+    // - direction (global, input, output)
+    // - stream flag
+    // - stream ID (usually 0)
+    //
+    // layout:
+    //
+    //      +------+-----+---+------+--------+----|------+--------------+
+    //      | kind | dir | - |stream|streamID|flex|vendor|  base index  |
+    //      +------+-----+---+------+--------+----+------+--------------+
+    //  bit: 31..30 29.28       25   24 .. 17  16    15   14    ..     0
+    //
+public:
+    /**
+     * C2Param kinds, usable as bitmaps.
+     */
+    enum Kind : uint32_t {
+        NONE    = 0,
+        STRUCT  = (1 << 0),
+        INFO    = (1 << 1),
+        SETTING = (1 << 2),
+        TUNING  = (1 << 3) | SETTING, // tunings are settings
+    };
+
+    /**
+     * base index (including the vendor extension bit) is a global index for
+     * C2 parameter structs. (e.g. the same indices cannot be reused for different
+     * structs for different components).
+     */
+    struct BaseIndex {
+    protected:
+        enum : uint32_t {
+            kTypeMask      = 0xC0000000,
+            kTypeStruct    = 0x00000000,
+            kTypeTuning    = 0x40000000,
+            kTypeSetting   = 0x80000000,
+            kTypeInfo      = 0xC0000000,
+
+            kDirMask       = 0x30000000,
+            kDirGlobal     = 0x20000000,
+            kDirUndefined  = 0x30000000, // MUST have all bits set
+            kDirInput      = 0x00000000,
+            kDirOutput     = 0x10000000,
+
+            kStreamFlag    = 0x02000000,
+            kStreamIdMask  = 0x01FE0000,
+            kStreamIdShift = 17,
+            kStreamIdMax   = kStreamIdMask >> kStreamIdShift,
+            kStreamMask    = kStreamFlag | kStreamIdMask,
+
+            kFlexibleFlag  = 0x00010000,
+            kVendorFlag    = 0x00008000,
+            kParamMask     = 0x0000FFFF,
+            kBaseMask      = kParamMask | kFlexibleFlag,
+        };
+
+    public:
+        enum : uint32_t {
+            kVendorStart = kVendorFlag, ///< vendor structs SHALL start after this
+            _kFlexibleFlag = kFlexibleFlag, // TODO: this is only needed for testing
+        };
+
+        /// constructor/conversion from uint32_t
+        inline BaseIndex(uint32_t index) : mIndex(index) { }
+
+        // no conversion from uint64_t
+        inline BaseIndex(uint64_t index) = delete;
+
+        /// returns true iff this is a vendor extension parameter
+        inline bool isVendor() const { return mIndex & kVendorFlag; }
+
+        /// returns true iff this is a flexible parameter (with variable size)
+        inline bool isFlexible() const { return mIndex & kFlexibleFlag; }
+
+        /// returns the base type: the index for the underlying struct
+        inline unsigned int baseIndex() const { return mIndex & kBaseMask; }
+
+        /// returns the param index for the underlying struct
+        inline unsigned int paramIndex() const { return mIndex & kParamMask; }
+
+        DEFINE_FIELD_BASED_COMPARISON_OPERATORS(BaseIndex, mIndex)
+
+    protected:
+        uint32_t mIndex;
+    };
+
+    /**
+     * type encompasses the parameter kind (tuning, setting, info), whether the
+     * parameter is global, input or output, and whether it is for a stream.
+     */
+    struct Type : public BaseIndex {
+        /// returns true iff this is a global parameter (not for input nor output)
+        inline bool isGlobal() const { return (mIndex & kDirMask) == kDirGlobal; }
+        /// returns true iff this is an input or input stream parameter
+        inline bool forInput() const { return (mIndex & kDirMask) == kDirInput; }
+        /// returns true iff this is an output or output stream parameter
+        inline bool forOutput() const { return (mIndex & kDirMask) == kDirOutput; }
+
+        /// returns true iff this is a stream parameter
+        inline bool forStream() const { return mIndex & kStreamFlag; }
+        /// returns true iff this is a port (input or output) parameter
+        inline bool forPort() const   { return !forStream() && !isGlobal(); }
+
+        /// returns the parameter type: the parameter index without the stream ID
+        inline uint32_t type() const { return mIndex & (~kStreamIdMask); }
+
+        /// return the kind of this param
+        inline Kind kind() const {
+            switch (mIndex & kTypeMask) {
+                case kTypeStruct: return STRUCT;
+                case kTypeInfo: return INFO;
+                case kTypeSetting: return SETTING;
+                case kTypeTuning: return TUNING;
+                default: return NONE; // should not happen
+            }
+        }
+
+        /// constructor/conversion from uint32_t
+        inline Type(uint32_t index) : BaseIndex(index) { }
+
+        // no conversion from uint64_t
+        inline Type(uint64_t index) = delete;
+
+    private:
+        friend struct C2Param;   // for setPort()
+        friend struct C2Tuning;  // for kTypeTuning
+        friend struct C2Setting; // for kTypeSetting
+        friend struct C2Info;    // for kTypeInfo
+        // for kDirGlobal
+        template<typename T, typename S, int I, class F> friend struct C2GlobalParam;
+        template<typename T, typename S, int I, class F> friend struct C2PortParam;   // for kDir*
+        template<typename T, typename S, int I, class F> friend struct C2StreamParam; // for kDir*
+        friend struct _C2ParamInspector; // for testing
+
+        /**
+         * Sets the port/stream direction.
+         * @return true on success, false if could not set direction (e.g. it is global param).
+         */
+        inline bool setPort(bool output) {
+            if (isGlobal()) {
+                return false;
+            } else {
+                mIndex = (mIndex & ~kDirMask) | (output ? kDirOutput : kDirInput);
+                return true;
+            }
+        }
+    };
+
+    /**
+     * index encompasses all remaining information: basically the stream ID.
+     */
+    struct Index : public Type {
+        /// returns the index as uint32_t
+        inline operator uint32_t() const { return mIndex; }
+
+        /// constructor/conversion from uint32_t
+        inline Index(uint32_t index) : Type(index) { }
+
+        // no conversion from uint64_t
+        inline Index(uint64_t index) = delete;
+
+        /// returns the stream ID or ~0 if not a stream
+        inline unsigned stream() const {
+            return forStream() ? rawStream() : ~0U;
+        }
+
+    private:
+        friend struct C2Param;           // for setStream, makeStreamId, isValid
+        friend struct _C2ParamInspector; // for testing
+
+        /**
+         * @return true if the type is valid, e.g. direction is not undefined AND
+         * stream is 0 if not a stream param.
+         */
+        inline bool isValid() const {
+            // there is no Type::isValid (even though some of this check could be
+            // performed on types) as this is only used on index...
+            return (forStream() ? rawStream() < kStreamIdMax : rawStream() == 0)
+                    && (mIndex & kDirMask) != kDirUndefined;
+        }
+
+        /// returns the raw stream ID field
+        inline unsigned rawStream() const {
+            return (mIndex & kStreamIdMask) >> kStreamIdShift;
+        }
+
+        /// returns the streamId bitfield for a given |stream|. If stream is invalid,
+        /// returns an invalid bitfield.
+        inline static uint32_t makeStreamId(unsigned stream) {
+            // saturate stream ID (max value is invalid)
+            if (stream > kStreamIdMax) {
+                stream = kStreamIdMax;
+            }
+            return (stream << kStreamIdShift) & kStreamIdMask;
+        }
+
+        /**
+         * Sets the stream index.
+         * \return true on success, false if could not set index (e.g. not a stream param).
+         */
+        inline bool setStream(unsigned stream) {
+            if (forStream()) {
+                mIndex = (mIndex & ~kStreamIdMask) | makeStreamId(stream);
+                return this->stream() < kStreamIdMax;
+            }
+            return false;
+        }
+    };
+
+public:
+    // public getters for Index methods
+
+    /// returns true iff this is a vendor extension parameter
+    inline bool isVendor() const { return _mIndex.isVendor(); }
+    /// returns true iff this is a flexible parameter
+    inline bool isFlexible() const { return _mIndex.isFlexible(); }
+    /// returns true iff this is a global parameter (not for input nor output)
+    inline bool isGlobal() const { return _mIndex.isGlobal(); }
+    /// returns true iff this is an input or input stream parameter
+    inline bool forInput() const { return _mIndex.forInput(); }
+    /// returns true iff this is an output or output stream parameter
+    inline bool forOutput() const { return _mIndex.forOutput(); }
+
+    /// returns true iff this is a stream parameter
+    inline bool forStream() const { return _mIndex.forStream(); }
+    /// returns true iff this is a port (input or output) parameter
+    inline bool forPort() const   { return _mIndex.forPort(); }
+
+    /// returns the stream ID or ~0 if not a stream
+    inline unsigned stream() const { return _mIndex.stream(); }
+
+    /// returns the parameter type: the parameter index without the stream ID
+    inline uint32_t type() const { return _mIndex.type(); }
+
+    /// returns the kind of this parameter
+    inline Kind kind() const { return _mIndex.kind(); }
+
+    /// returns the size of the parameter or 0 if the parameter is invalid
+    inline size_t size() const { return _mSize; }
+
+    /// returns true iff the parameter is valid
+    inline operator bool() const { return _mIndex.isValid() && _mSize > 0; }
+
+    /// returns true iff the parameter is invalid
+    inline bool operator!() const { return !operator bool(); }
+
+    // equality is done by memcmp (use equals() to prevent any overread)
+    inline bool operator==(const C2Param &o) const {
+        return equals(o) && memcmp(this, &o, _mSize) == 0;
+    }
+    inline bool operator!=(const C2Param &o) const { return !operator==(o); }
+
+    /// safe(r) type cast from pointer and size
+    inline static C2Param* From(void *addr, size_t len) {
+        // _mSize must fit into size
+        if (len < sizeof(_mSize) + offsetof(C2Param, _mSize)) {
+            return nullptr;
+        }
+        // _mSize must match length
+        C2Param *param = (C2Param*)addr;
+        if (param->_mSize != len) {
+            return nullptr;
+        }
+        return param;
+    }
+
+#if 0
+    template<typename P, class=decltype(C2Param(P()))>
+    P *As() { return P::From(this); }
+    template<typename P>
+    const P *As() const { return const_cast<const P*>(P::From(const_cast<C2Param*>(this))); }
+#endif
+
+protected:
+    /// sets the stream field. Returns true iff successful.
+    inline bool setStream(unsigned stream) {
+        return _mIndex.setStream(stream);
+    }
+
+    /// sets the port (direction). Returns true iff successful.
+    inline bool setPort(bool output) {
+        return _mIndex.setPort(output);
+    }
+
+public:
+    /// invalidate this parameter. There is no recovery from this call; e.g. parameter
+    /// cannot be 'corrected' to be valid.
+    inline void invalidate() { _mSize = 0; }
+
+    // if other is the same kind of (valid) param as this, copy it into this and return true.
+    // otherwise, do not copy anything, and return false.
+    inline bool updateFrom(const C2Param &other) {
+        if (other._mSize == _mSize && other._mIndex == _mIndex && _mSize > 0) {
+            memcpy(this, &other, _mSize);
+            return true;
+        }
+        return false;
+    }
+
+protected:
+    // returns |o| if it is a null ptr, or if can suitably be a param of given |type| (e.g. has
+    // same type (ignoring stream ID), and size). Otherwise, returns null. If |checkDir| is false,
+    // allow undefined or different direction (e.g. as constructed from C2PortParam() vs.
+    // C2PortParam::input), but still require equivalent type (stream, port or global); otherwise,
+    // return null.
+    inline static const C2Param* ifSuitable(
+            const C2Param* o, size_t size, Type type, size_t flexSize = 0, bool checkDir = true) {
+        if (o == nullptr || o->_mSize < size || (flexSize && ((o->_mSize - size) % flexSize))) {
+            return nullptr;
+        } else if (checkDir) {
+            return o->_mIndex.type() == type.mIndex ? o : nullptr;
+        } else if (o->_mIndex.isGlobal()) {
+            return nullptr;
+        } else {
+            return ((o->_mIndex.type() ^ type.mIndex) & ~Type::kDirMask) ? nullptr : o;
+        }
+    }
+
+    /// base constructor
+    inline C2Param(uint32_t paramSize, Index paramIndex)
+        : _mSize(paramSize),
+          _mIndex(paramIndex) {
+        if (paramSize > sizeof(C2Param)) {
+            memset(this + 1, 0, paramSize - sizeof(C2Param));
+        }
+    }
+
+    /// base constructor with stream set
+    inline C2Param(uint32_t paramSize, Index paramIndex, unsigned stream)
+        : _mSize(paramSize),
+          _mIndex(paramIndex | Index::makeStreamId(stream)) {
+        if (paramSize > sizeof(C2Param)) {
+            memset(this + 1, 0, paramSize - sizeof(C2Param));
+        }
+        if (!forStream()) {
+            invalidate();
+        }
+    }
+
+private:
+    friend struct _C2ParamInspector; // for testing
+
+    /// returns the base type: the index for the underlying struct (for testing
+    /// as this can be gotten by the baseIndex enum)
+    inline uint32_t _baseIndex() const { return _mIndex.baseIndex(); }
+
+    /// returns true iff |o| has the same size and index as this. This performs the
+    /// basic check for equality.
+    inline bool equals(const C2Param &o) const {
+        return _mSize == o._mSize && _mIndex == o._mIndex;
+    }
+
+    uint32_t _mSize;
+    Index _mIndex;
+};
+
+/// \ingroup internal
+/// allow C2Params access to private methods, e.g. constructors
+#define C2PARAM_MAKE_FRIENDS \
+    template<typename U, typename S, int I, class F> friend struct C2GlobalParam; \
+    template<typename U, typename S, int I, class F> friend struct C2PortParam; \
+    template<typename U, typename S, int I, class F> friend struct C2StreamParam; \
+
+/**
+ * Setting base structure for component method signatures. Wrap constructors.
+ */
+struct C2Setting : public C2Param {
+protected:
+    template<typename ...Args>
+    inline C2Setting(const Args(&... args)) : C2Param(args...) { }
+public: // TODO
+    enum : uint32_t { indexFlags = Type::kTypeSetting };
+};
+
+/**
+ * Tuning base structure for component method signatures. Wrap constructors.
+ */
+struct C2Tuning : public C2Setting {
+protected:
+    template<typename ...Args>
+    inline C2Tuning(const Args(&... args)) : C2Setting(args...) { }
+public: // TODO
+    enum : uint32_t { indexFlags = Type::kTypeTuning };
+};
+
+/**
+ * Info base structure for component method signatures. Wrap constructors.
+ */
+struct C2Info : public C2Param {
+protected:
+    template<typename ...Args>
+    inline C2Info(const Args(&... args)) : C2Param(args...) { }
+public: // TODO
+    enum : uint32_t { indexFlags = Type::kTypeInfo };
+};
+
+/**
+ * Structure uniquely specifying a field in an arbitrary structure.
+ *
+ * \note This structure is used differently in C2FieldDescriptor to
+ * identify array fields, such that _mSize is the size of each element. This is
+ * because the field descriptor contains the array-length, and we want to keep
+ * a relevant element size for variable length arrays.
+ */
+struct _C2FieldId {
+//public:
+    /**
+     * Constructor used for C2FieldDescriptor that removes the array extent.
+     *
+     * \param[in] offset pointer to the field in an object at address 0.
+     */
+    template<typename T, class B=typename std::remove_extent<T>::type>
+    inline _C2FieldId(T* offset)
+        : // offset is from "0" so will fit on 32-bits
+          _mOffset((uint32_t)(uintptr_t)(offset)),
+          _mSize(sizeof(B)) { }
+
+    /**
+     * Direct constructor from offset and size.
+     *
+     * \param[in] offset offset of the field.
+     * \param[in] size size of the field.
+     */
+    inline _C2FieldId(size_t offset, size_t size)
+        : _mOffset(offset), _mSize(size) {}
+
+    /**
+     * Constructor used to identify a field in an object.
+     *
+     * \param U[type] pointer to the object that contains this field. This is needed in case the
+     *        field is in an (inherited) base class, in which case T will be that base class.
+     * \param pm[im] member pointer to the field
+     */
+    template<typename R, typename T, typename U, typename B=typename std::remove_extent<R>::type>
+    inline _C2FieldId(U *, R T::* pm)
+        : _mOffset((uint32_t)(uintptr_t)(&(((U*)256)->*pm)) - 256u),
+          _mSize(sizeof(B)) { }
+
+    /**
+     * Constructor used to identify a field in an object.
+     *
+     * \param U[type] pointer to the object that contains this field
+     * \param pm[im] member pointer to the field
+     */
+    template<typename R, typename T, typename B=typename std::remove_extent<R>::type>
+    inline _C2FieldId(R T::* pm)
+        : _mOffset((uint32_t)(uintptr_t)(&(((T*)0)->*pm))),
+          _mSize(sizeof(B)) { }
+
+    inline bool operator==(const _C2FieldId &other) const {
+        return _mOffset == other._mOffset && _mSize == other._mSize;
+    }
+
+    inline bool operator<(const _C2FieldId &other) const {
+        return _mOffset < other._mOffset ||
+            // NOTE: order parent structure before sub field
+            (_mOffset == other._mOffset && _mSize > other._mSize);
+    }
+
+    DEFINE_OTHER_COMPARISON_OPERATORS(_C2FieldId)
+
+#if 0
+    inline uint32_t offset() const { return _mOffset; }
+    inline uint32_t size() const { return _mSize; }
+#endif
+
+#if defined(FRIEND_TEST)
+    friend void PrintTo(const _C2FieldId &d, ::std::ostream*);
+#endif
+
+private:
+    uint32_t _mOffset; // offset of field
+    uint32_t _mSize;   // size of field
+};
+
+/**
+ * Structure uniquely specifying a field in a configuration
+ */
+struct C2ParamField {
+//public:
+    // TODO: fix what this is for T[] (for now size becomes T[1])
+    template<typename S, typename T>
+    inline C2ParamField(S* param, T* offset)
+        : _mIndex(param->index()),
+          _mFieldId(offset) {}
+
+    template<typename R, typename T, typename U>
+    inline C2ParamField(U *p, R T::* pm) : _mIndex(p->type()), _mFieldId(p, pm) { }
+
+    inline bool operator==(const C2ParamField &other) const {
+        return _mIndex == other._mIndex && _mFieldId == other._mFieldId;
+    }
+
+    inline bool operator<(const C2ParamField &other) const {
+        return _mIndex < other._mIndex ||
+            (_mIndex == other._mIndex && _mFieldId < other._mFieldId);
+    }
+
+    DEFINE_OTHER_COMPARISON_OPERATORS(C2ParamField)
+
+private:
+    C2Param::Index _mIndex;
+    _C2FieldId _mFieldId;
+};
+
+/**
+ * A shared (union) representation of numeric values
+ */
+class C2Value {
+public:
+    /// A union of supported primitive types.
+    union Primitive {
+        int32_t  i32;   ///< int32_t value
+        uint32_t u32;   ///< uint32_t value
+        int64_t  i64;   ///< int64_t value
+        uint64_t u64;   ///< uint64_t value
+        float    fp;    ///< float value
+
+        // constructors - implicit
+        Primitive(int32_t value)  : i32(value) { }
+        Primitive(uint32_t value) : u32(value) { }
+        Primitive(int64_t value)  : i64(value) { }
+        Primitive(uint64_t value) : u64(value) { }
+        Primitive(float value)    : fp(value)  { }
+
+        Primitive() : u64(0) { }
+
+    private:
+        friend class C2Value;
+        template<typename T> const T &ref() const;
+    };
+
+    enum Type {
+        NO_INIT,
+        INT32,
+        UINT32,
+        INT64,
+        UINT64,
+        FLOAT,
+    };
+
+    template<typename T> static constexpr Type typeFor();
+
+    // constructors - implicit
+    template<typename T>
+    C2Value(T value)  : mType(typeFor<T>()),  mValue(value) { }
+
+    C2Value() : mType(NO_INIT) { }
+
+    inline Type type() const { return mType; }
+
+    template<typename T>
+    inline bool get(T *value) const {
+        if (mType == typeFor<T>()) {
+            *value = mValue.ref<T>();
+            return true;
+        }
+        return false;
+    }
+
+private:
+    Type mType;
+    Primitive mValue;
+};
+
+template<> const int32_t &C2Value::Primitive::ref<int32_t>() const { return i32; }
+template<> const int64_t &C2Value::Primitive::ref<int64_t>() const { return i64; }
+template<> const uint32_t &C2Value::Primitive::ref<uint32_t>() const { return u32; }
+template<> const uint64_t &C2Value::Primitive::ref<uint64_t>() const { return u64; }
+template<> const float &C2Value::Primitive::ref<float>() const { return fp; }
+
+template<> constexpr C2Value::Type C2Value::typeFor<int32_t>() { return INT32; }
+template<> constexpr C2Value::Type C2Value::typeFor<int64_t>() { return INT64; }
+template<> constexpr C2Value::Type C2Value::typeFor<uint32_t>() { return UINT32; }
+template<> constexpr C2Value::Type C2Value::typeFor<uint64_t>() { return UINT64; }
+template<> constexpr C2Value::Type C2Value::typeFor<float>() { return FLOAT; }
+
+/**
+ * field descriptor. A field is uniquely defined by an index into a parameter.
+ * (Note: Stream-id is not captured as a field.)
+ *
+ * Ordering of fields is by offset. In case of structures, it is depth first,
+ * with a structure taking an index just before and in addition to its members.
+ */
+struct C2FieldDescriptor {
+//public:
+    /** field types and flags
+     * \note: only 32-bit and 64-bit fields are supported (e.g. no boolean, as that
+     * is represented using INT32).
+     */
+    enum Type : uint32_t {
+        // primitive types
+        INT32   = C2Value::INT32,  ///< 32-bit signed integer
+        UINT32  = C2Value::UINT32, ///< 32-bit unsigned integer
+        INT64   = C2Value::INT64,  ///< 64-bit signed integer
+        UINT64  = C2Value::UINT64, ///< 64-bit signed integer
+        FLOAT   = C2Value::FLOAT,  ///< 32-bit floating point
+
+        // array types
+        STRING = 0x100, ///< fixed-size string (POD)
+        BLOB,           ///< blob. Blobs have no sub-elements and can be thought of as byte arrays;
+                        ///< however, bytes cannot be individually addressed by clients.
+
+        // complex types
+        STRUCT_FLAG = 0x10000, ///< structs. Marked with this flag in addition to their baseIndex.
+    };
+
+    typedef std::pair<C2String, C2Value::Primitive> named_value_type;
+    typedef std::vector<const named_value_type> named_values_type;
+    //typedef std::pair<std::vector<C2String>, std::vector<C2Value::Primitive>> named_values_type;
+
+    /**
+     * Template specialization that returns the named values for a type.
+     *
+     * \todo hide from client.
+     *
+     * \return a vector of name-value pairs.
+     */
+    template<typename B>
+    static named_values_type namedValuesFor(const B &);
+
+    inline C2FieldDescriptor(uint32_t type, uint32_t length, C2StringLiteral name, size_t offset, size_t size)
+        : _mType((Type)type), _mLength(length), _mName(name), _mFieldId(offset, size) { }
+
+    template<typename T, class B=typename std::remove_extent<T>::type>
+    inline C2FieldDescriptor(const T* offset, const char *name)
+        : _mType(this->getType((B*)nullptr)),
+          _mLength(std::is_array<T>::value ? std::extent<T>::value : 1),
+          _mName(name),
+          _mNamedValues(namedValuesFor(*(B*)0)),
+          _mFieldId(offset) {}
+
+/*
+    template<typename T, typename B=typename std::remove_extent<T>::type>
+    inline C2FieldDescriptor<T, B, false>(T* offset, const char *name)
+        : _mType(this->getType((B*)nullptr)),
+          _mLength(std::is_array<T>::value ? std::extent<T>::value : 1),
+          _mName(name),
+          _mFieldId(offset) {}
+*/
+
+    /// \deprecated
+    template<typename T, typename S, class B=typename std::remove_extent<T>::type>
+    constexpr inline C2FieldDescriptor(S*, T S::* field, const char *name)
+        : _mType(this->getType((B*)nullptr)),
+          _mLength(std::is_array<T>::value ? std::extent<T>::value : 1),
+          _mName(name),
+          _mFieldId(&(((S*)0)->*field)) {}
+
+    /// returns the type of this field
+    inline Type type() const { return _mType; }
+    /// returns the length of the field in case it is an array. Returns 0 for
+    /// T[] arrays, returns 1 for T[1] arrays as well as if the field is not an array.
+    inline size_t length() const { return _mLength; }
+    /// returns the name of the field
+    inline C2StringLiteral name() const { return _mName; }
+
+    const named_values_type &namedValues() const { return _mNamedValues; }
+
+#if defined(FRIEND_TEST)
+    friend void PrintTo(const C2FieldDescriptor &, ::std::ostream*);
+    friend bool operator==(const C2FieldDescriptor &, const C2FieldDescriptor &);
+    FRIEND_TEST(C2ParamTest_ParamFieldList, VerifyStruct);
+#endif
+
+private:
+    const Type _mType;
+    const uint32_t _mLength; // the last member can be arbitrary length if it is T[] array,
+                       // extending to the end of the parameter (this is marked with
+                       // 0). T[0]-s are not fields.
+    const C2StringLiteral _mName;
+    const named_values_type _mNamedValues;
+
+    const _C2FieldId _mFieldId;   // field identifier (offset and size)
+
+    // NOTE: We do not capture default value(s) here as that may depend on the component.
+    // NOTE: We also do not capture bestEffort, as 1) this should be true for most fields,
+    // 2) this is at parameter granularity.
+
+    // type resolution
+    inline static Type getType(int32_t*)  { return INT32; }
+    inline static Type getType(uint32_t*) { return UINT32; }
+    inline static Type getType(int64_t*)  { return INT64; }
+    inline static Type getType(uint64_t*) { return UINT64; }
+    inline static Type getType(float*)    { return FLOAT; }
+    inline static Type getType(char*)     { return STRING; }
+    inline static Type getType(uint8_t*)  { return BLOB; }
+
+    template<typename T,
+             class=typename std::enable_if<std::is_enum<T>::value>::type>
+    inline static Type getType(T*) {
+        typename std::underlying_type<T>::type underlying(0);
+        return getType(&underlying);
+    }
+
+    // verify C2Struct by having a fieldList and a baseIndex.
+    template<typename T,
+             class=decltype(T::baseIndex + 1), class=decltype(T::fieldList)>
+    inline static Type getType(T*) {
+        static_assert(!std::is_base_of<C2Param, T>::value, "cannot use C2Params as fields");
+        return (Type)(T::baseIndex | STRUCT_FLAG);
+    }
+};
+
+#define DEFINE_NO_NAMED_VALUES_FOR(type) \
+template<> inline C2FieldDescriptor::named_values_type C2FieldDescriptor::namedValuesFor(const type &) { \
+    return named_values_type(); \
+}
+
+// We cannot subtype constructor for enumerated types so insted define no named values for
+// non-enumerated integral types.
+DEFINE_NO_NAMED_VALUES_FOR(int32_t)
+DEFINE_NO_NAMED_VALUES_FOR(uint32_t)
+DEFINE_NO_NAMED_VALUES_FOR(int64_t)
+DEFINE_NO_NAMED_VALUES_FOR(uint64_t)
+DEFINE_NO_NAMED_VALUES_FOR(uint8_t)
+DEFINE_NO_NAMED_VALUES_FOR(char)
+DEFINE_NO_NAMED_VALUES_FOR(float)
+
+/**
+ * Describes the fields of a structure.
+ */
+struct C2StructDescriptor {
+public:
+    /// Returns the parameter type
+    inline C2Param::BaseIndex baseIndex() const { return _mType.baseIndex(); }
+
+    // Returns the number of fields in this param (not counting any recursive fields).
+    // Must be at least 1 for valid params.
+    inline size_t numFields() const { return _mFields.size(); }
+
+    // Returns the list of immediate fields (not counting any recursive fields).
+    typedef std::vector<const C2FieldDescriptor>::const_iterator field_iterator;
+    inline field_iterator cbegin() const { return _mFields.cbegin(); }
+    inline field_iterator cend() const { return _mFields.cend(); }
+
+    // only supplying const iterator - but these are needed for range based loops
+    inline field_iterator begin() const { return _mFields.cbegin(); }
+    inline field_iterator end() const { return _mFields.cend(); }
+
+    template<typename T>
+    inline C2StructDescriptor(T*)
+        : C2StructDescriptor(T::baseIndex, T::fieldList) { }
+
+    inline C2StructDescriptor(
+            C2Param::BaseIndex type,
+            std::initializer_list<const C2FieldDescriptor> fields)
+        : _mType(type), _mFields(fields) { }
+
+private:
+    const C2Param::BaseIndex _mType;
+    const std::vector<const C2FieldDescriptor> _mFields;
+};
+
+/**
+ * Describes parameters for a component.
+ */
+struct C2ParamDescriptor {
+public:
+    /**
+     * Returns whether setting this param is required to configure this component.
+     * This can only be true for builtin params for platform-defined components (e.g. video and
+     * audio encoders/decoders, video/audio filters).
+     * For vendor-defined components, it can be true even for vendor-defined params,
+     * but it is not recommended, in case the component becomes platform-defined.
+     */
+    inline bool isRequired() const { return _mIsRequired; }
+
+    /**
+     * Returns whether this parameter is persistent. This is always true for C2Tuning and C2Setting,
+     * but may be false for C2Info. If true, this parameter persists across frames and applies to
+     * the current and subsequent frames. If false, this C2Info parameter only applies to the
+     * current frame and is not assumed to have the same value (or even be present) on subsequent
+     * frames, unless it is specified for those frames.
+     */
+    inline bool isPersistent() const { return _mIsPersistent; }
+
+    /// Returns the name of this param.
+    /// This defaults to the underlying C2Struct's name, but could be altered for a component.
+    inline C2String name() const { return _mName; }
+
+    /// Returns the parameter type
+    /// \todo fix this
+    inline C2Param::Type type() const { return _mType; }
+
+    template<typename T>
+    inline C2ParamDescriptor(bool isRequired, C2StringLiteral name, const T*)
+        : _mIsRequired(isRequired),
+          _mIsPersistent(true),
+          _mName(name),
+          _mType(T::typeIndex) { }
+
+    inline C2ParamDescriptor(
+            bool isRequired, C2StringLiteral name, C2Param::Type type)
+        : _mIsRequired(isRequired),
+          _mIsPersistent(true),
+          _mName(name),
+          _mType(type) { }
+
+private:
+    const bool _mIsRequired;
+    const bool _mIsPersistent;
+    const C2String _mName;
+    const C2Param::Type _mType;
+};
+
+/// \ingroup internal
+/// Define a structure without baseIndex.
+#define DEFINE_C2STRUCT_NO_BASE(name) \
+public: \
+    typedef C2##name##Struct _type; /**< type name shorthand */ \
+    const static std::initializer_list<const C2FieldDescriptor> fieldList; /**< structure fields */
+
+/// Define a structure with matching baseIndex.
+#define DEFINE_C2STRUCT(name) \
+public: \
+    enum : uint32_t { baseIndex = kParamIndex##name }; \
+    DEFINE_C2STRUCT_NO_BASE(name)
+
+/// Define a flexible structure with matching baseIndex.
+#define DEFINE_FLEX_C2STRUCT(name, flexMember) \
+public: \
+    FLEX(C2##name##Struct, flexMember) \
+    enum : uint32_t { baseIndex = kParamIndex##name | C2Param::BaseIndex::_kFlexibleFlag }; \
+    DEFINE_C2STRUCT_NO_BASE(name)
+
+/// \ingroup internal
+/// Describe a structure of a templated structure.
+#define DESCRIBE_TEMPLATED_C2STRUCT(strukt, list) \
+    template<> \
+    const std::initializer_list<const C2FieldDescriptor> strukt::fieldList = list;
+
+/// \deprecated
+/// Describe the fields of a structure using an initializer list.
+#define DESCRIBE_C2STRUCT(name, list) \
+    const std::initializer_list<const C2FieldDescriptor> C2##name##Struct::fieldList = list;
+
+/**
+ * Describe a field of a structure.
+ * These must be in order.
+ *
+ * There are two ways to use this macro:
+ *
+ *  ~~~~~~~~~~~~~ (.cpp)
+ *  struct C2VideoWidthStruct {
+ *      int32_t mWidth;
+ *      C2VideoWidthStruct() {} // optional default constructor
+ *      C2VideoWidthStruct(int32_t _width) : mWidth(_width) {}
+ *
+ *      DEFINE_AND_DESCRIBE_C2STRUCT(VideoWidth)
+ *      C2FIELD(mWidth, "width")
+ *  };
+ *  ~~~~~~~~~~~~~
+ *
+ *  ~~~~~~~~~~~~~ (.cpp)
+ *  struct C2VideoWidthStruct {
+ *      int32_t mWidth;
+ *      C2VideoWidthStruct() = default; // optional default constructor
+ *      C2VideoWidthStruct(int32_t _width) : mWidth(_width) {}
+ *
+ *      DEFINE_C2STRUCT(VideoWidth)
+ *  } C2_PACK;
+ *
+ *  DESCRIBE_C2STRUCT(VideoWidth, {
+ *      C2FIELD(mWidth, "width")
+ *  })
+ *  ~~~~~~~~~~~~~
+ *
+ *  For flexible structures (those ending in T[]), use the flexible macros:
+ *
+ *  ~~~~~~~~~~~~~ (.cpp)
+ *  struct C2VideoFlexWidthsStruct {
+ *      int32_t mWidths[];
+ *      C2VideoFlexWidthsStruct(); // must have a default constructor
+ *
+ *  private:
+ *      // may have private constructors taking number of widths as the first argument
+ *      // This is used by the C2Param factory methods, e.g.
+ *      //   C2VideoFlexWidthsGlobalParam::alloc_unique(size_t, int32_t);
+ *      C2VideoFlexWidthsStruct(size_t flexCount, int32_t value) {
+ *          for (size_t i = 0; i < flexCount; ++i) {
+ *              mWidths[i] = value;
+ *          }
+ *      }
+ *
+ *      // If the last argument is T[N] or std::initializer_list<T>, the flexCount will
+ *      // be automatically calculated and passed by the C2Param factory methods, e.g.
+ *      //   int widths[] = { 1, 2, 3 };
+ *      //   C2VideoFlexWidthsGlobalParam::alloc_unique(widths);
+ *      template<unsigned N>
+ *      C2VideoFlexWidthsStruct(size_t flexCount, const int32_t(&init)[N]) {
+ *          for (size_t i = 0; i < flexCount; ++i) {
+ *              mWidths[i] = init[i];
+ *          }
+ *      }
+ *
+ *      DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(VideoFlexWidths, mWidths)
+ *      C2FIELD(mWidths, "widths")
+ *  };
+ *  ~~~~~~~~~~~~~
+ *
+ *  ~~~~~~~~~~~~~ (.cpp)
+ *  struct C2VideoFlexWidthsStruct {
+ *      int32_t mWidths[];
+ *      C2VideoFlexWidthsStruct(); // must have a default constructor
+ *
+ *      DEFINE_FLEX_C2STRUCT(VideoFlexWidths, mWidths)
+ *  } C2_PACK;
+ *
+ *  DESCRIBE_C2STRUCT(VideoFlexWidths, {
+ *      C2FIELD(mWidths, "widths")
+ *  })
+ *  ~~~~~~~~~~~~~
+ *
+ */
+#define C2FIELD(member, name) \
+  C2FieldDescriptor(&((_type*)(nullptr))->member, name),
+
+/// \deprecated
+#define C2SOLE_FIELD(member, name) \
+  C2FieldDescriptor(&_type::member, name, 0)
+
+/// Define a structure with matching baseIndex and start describing its fields.
+/// This must be at the end of the structure definition.
+#define DEFINE_AND_DESCRIBE_C2STRUCT(name) \
+    DEFINE_C2STRUCT(name) }  C2_PACK; \
+    const std::initializer_list<const C2FieldDescriptor> C2##name##Struct::fieldList = {
+
+/// Define a flexible structure with matching baseIndex and start describing its fields.
+/// This must be at the end of the structure definition.
+#define DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(name, flexMember) \
+    DEFINE_FLEX_C2STRUCT(name, flexMember) } C2_PACK; \
+    const std::initializer_list<const C2FieldDescriptor> C2##name##Struct::fieldList = {
+
+/**
+ * Parameter reflector class.
+ *
+ * This class centralizes the description of parameter structures. This can be shared
+ * by multiple components as describing a parameter does not imply support of that
+ * parameter. However, each supported parameter and any dependent structures within
+ * must be described by the parameter reflector provided by a component.
+ */
+class C2ParamReflector {
+public:
+    /**
+     *  Describes a parameter structure.
+     *
+     *  \param[in] paramIndex the base index of the parameter structure
+     *
+     *  \return the description of the parameter structure
+     *  \retval nullptr if the parameter is not supported by this reflector
+     *
+     *  This methods shall not block and return immediately.
+     *
+     *  \note this class does not take a set of indices because we would then prefer
+     *  to also return any dependent structures, and we don't want this logic to be
+     *  repeated in each reflector. Alternately, this could just return a map of all
+     *  descriptions, but we want to conserve memory if client only wants the description
+     *  of a few indices.
+     */
+    virtual std::unique_ptr<C2StructDescriptor> describe(C2Param::BaseIndex paramIndex) = 0;
+
+protected:
+    virtual ~C2ParamReflector() = default;
+};
+
+/**
+ * A useable supported values for a field.
+ *
+ * This can be either a range or a set of values. The range can be linear or geometric with a
+ * clear minimum and maximum value, and can have an optional step size or geometric ratio. Values
+ * can optionally represent flags.
+ *
+ * \note Do not use flags to represent bitfields. Use individual values or separate fields instead.
+ */
+template<typename T>
+struct C2TypedFieldSupportedValues {
+//public:
+    enum Type {
+        RANGE,      ///< a numeric range that can be continuous or discrete
+        VALUES,     ///< a list of values
+        FLAGS       ///< a list of flags that can be OR-ed
+    };
+
+    Type type;
+
+    struct {
+        T min;
+        T max;
+        T step;
+        T nom;
+        T denom;
+    } range;
+    std::vector<T> values;
+
+    C2TypedFieldSupportedValues(T min, T max, T step = T(std::is_floating_point<T>::value ? 0 : 1))
+        : type(RANGE),
+          range{min, max, step, (T)1, (T)1} { }
+
+    C2TypedFieldSupportedValues(T min, T max, T nom, T den) :
+        type(RANGE),
+        range{min, max, (T)0, nom, den} { }
+
+    C2TypedFieldSupportedValues(bool flags, std::initializer_list<T> list) :
+        type(flags ? FLAGS : VALUES),
+        values(list) {}
+};
+
+/**
+ * Generic supported values for a field.
+ *
+ * This can be either a range or a set of values. The range can be linear or geometric with a
+ * clear minimum and maximum value, and can have an optional step size or geometric ratio. Values
+ * can optionally represent flags.
+ *
+ * \note Do not use flags to represent bitfields. Use individual values or separate fields instead.
+ */
+struct C2FieldSupportedValues {
+//public:
+    enum Type {
+        RANGE,      ///< a numeric range that can be continuous or discrete
+        VALUES,     ///< a list of values
+        FLAGS       ///< a list of flags that can be OR-ed
+    };
+
+    Type type;
+
+    typedef C2Value::Primitive Primitive;
+
+    struct {
+        Primitive min;
+        Primitive max;
+        Primitive step;
+        Primitive nom;
+        Primitive denom;
+    } range;
+    std::vector<Primitive> values;
+
+    template<typename T>
+    C2FieldSupportedValues(T min, T max, T step = T(std::is_floating_point<T>::value ? 0 : 1))
+        : type(RANGE),
+          range{min, max, step, (T)1, (T)1} { }
+
+    template<typename T>
+    C2FieldSupportedValues(T min, T max, T nom, T den) :
+        type(RANGE),
+        range{min, max, (T)0, nom, den} { }
+
+    template<typename T>
+    C2FieldSupportedValues(bool flags, std::initializer_list<T> list)
+        : type(flags ? FLAGS : VALUES),
+          range{(T)0, (T)0, (T)0, (T)0, (T)0} {
+        for(T value : list) {
+            values.emplace_back(value);
+        }
+    }
+
+    template<typename T, typename E=decltype(C2FieldDescriptor::namedValuesFor(*(T*)0))>
+    C2FieldSupportedValues(bool flags, const T*)
+        : type(flags ? FLAGS : VALUES),
+          range{(T)0, (T)0, (T)0, (T)0, (T)0} {
+              C2FieldDescriptor::named_values_type named = C2FieldDescriptor::namedValuesFor(*(T*)0);
+        for (const C2FieldDescriptor::named_value_type &item : named) {
+            values.emplace_back(item.second);
+        }
+    }
+};
+
+/// @}
+
+}  // namespace android
+
+#endif  // C2PARAM_H_
diff --git a/media/libstagefright/codec2/include/C2ParamDef.h b/media/libstagefright/codec2/include/C2ParamDef.h
new file mode 100644
index 0000000..f369617
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2ParamDef.h
@@ -0,0 +1,901 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** \file
+ * Templates used to declare parameters.
+ */
+#ifndef C2PARAM_DEF_H_
+#define C2PARAM_DEF_H_
+
+#include <type_traits>
+
+#include <C2Param.h>
+
+namespace android {
+
+/// \addtogroup Parameters
+/// @{
+
+/* ======================== UTILITY TEMPLATES FOR PARAMETER DEFINITIONS ======================== */
+
+/// \addtogroup internal
+/// @{
+
+/// Helper class that checks if a type has equality and inequality operators.
+struct C2_HIDE _C2Comparable_impl
+{
+    template<typename S, typename=decltype(S() == S())>
+    static std::true_type __testEQ(int);
+    template<typename>
+    static std::false_type __testEQ(...);
+
+    template<typename S, typename=decltype(S() != S())>
+    static std::true_type __testNE(int);
+    template<typename>
+    static std::false_type __testNE(...);
+};
+
+/**
+ * Helper template that returns if a type has equality and inequality operators.
+ *
+ * Use as _C2Comparable<typename S>::value.
+ */
+template<typename S>
+struct C2_HIDE _C2Comparable
+    : public std::integral_constant<bool, decltype(_C2Comparable_impl::__testEQ<S>(0))::value
+                        || decltype(_C2Comparable_impl::__testNE<S>(0))::value> {
+};
+
+///  Helper class that checks if a type has a baseIndex constant.
+struct C2_HIDE _C2BaseIndexHelper_impl
+{
+    template<typename S, int=S::baseIndex>
+    static std::true_type __testBaseIndex(int);
+    template<typename>
+    static std::false_type __testBaseIndex(...);
+};
+
+/// Helper template that verifies a type's baseIndex and creates it if the type does not have one.
+template<typename S, int BaseIndex,
+        bool HasBase=decltype(_C2BaseIndexHelper_impl::__testBaseIndex<S>(0))::value>
+struct C2_HIDE C2BaseIndexOverride {
+    // TODO: what if we allow structs without baseIndex?
+    static_assert(BaseIndex == S::baseIndex, "baseIndex differs from structure");
+};
+
+/// Specialization for types without a baseIndex.
+template<typename S, int BaseIndex>
+struct C2_HIDE C2BaseIndexOverride<S, BaseIndex, false> {
+public:
+    enum : uint32_t {
+        baseIndex = BaseIndex, ///< baseIndex override.
+    };
+};
+
+/// Helper template that adds a baseIndex to a type if it does not have one.
+template<typename S, int BaseIndex>
+struct C2_HIDE C2AddBaseIndex : public S, public C2BaseIndexOverride<S, BaseIndex> {};
+
+/**
+ * \brief Helper class to check struct requirements for parameters.
+ *
+ * Features:
+ *  - verify default constructor, no virtual methods, and no equality operators.
+ *  - expose typeIndex, and non-flex flexSize.
+ */
+template<typename S, int BaseIndex, unsigned TypeIndex>
+struct C2_HIDE C2StructCheck {
+    static_assert(
+            std::is_default_constructible<S>::value, "C2 structure must have default constructor");
+    static_assert(!std::is_polymorphic<S>::value, "C2 structure must not have virtual methods");
+    static_assert(!_C2Comparable<S>::value, "C2 structure must not have operator== or !=");
+
+public:
+    enum : uint32_t {
+        typeIndex = BaseIndex | TypeIndex
+    };
+
+protected:
+    enum : uint32_t {
+        flexSize = 0, // TODO: is this still needed? this may be confusing.
+    };
+};
+
+/// Helper class that checks if a type has an integer flexSize member.
+struct C2_HIDE _C2Flexible_impl {
+    /// specialization for types that have a flexSize member
+    template<typename S, unsigned=S::flexSize>
+    static std::true_type __testFlexSize(int);
+    template<typename>
+    static std::false_type __testFlexSize(...);
+};
+
+/// Helper template that returns if a type has an integer flexSize member.
+template<typename S>
+struct C2_HIDE _C2Flexible
+    : public std::integral_constant<bool, decltype(_C2Flexible_impl::__testFlexSize<S>(0))::value> {
+};
+
+/// Macro to test if a type is flexible (has a flexSize member).
+#define IF_FLEXIBLE(S) ENABLE_IF(_C2Flexible<S>::value)
+/// Shorthand for std::enable_if
+#define ENABLE_IF(cond) typename std::enable_if<cond>::type
+
+/// Helper template that exposes the flexible subtype of a struct.
+template<typename S, typename E=void>
+struct C2_HIDE _C2FlexHelper {
+    typedef void flexType;
+    enum : uint32_t { flexSize = 0 };
+};
+
+/// Specialization for flexible types.
+template<typename S>
+struct C2_HIDE _C2FlexHelper<S,
+        typename std::enable_if<!std::is_void<typename S::flexMemberType>::value>::type> {
+    typedef typename _C2FlexHelper<typename S::flexMemberType>::flexType flexType;
+    enum : uint32_t { flexSize = _C2FlexHelper<typename S::flexMemberType>::flexSize };
+};
+
+/// Specialization for flex arrays.
+template<typename S>
+struct C2_HIDE _C2FlexHelper<S[],
+        typename std::enable_if<std::is_void<typename _C2FlexHelper<S>::flexType>::value>::type> {
+    typedef S flexType;
+    enum : uint32_t { flexSize = sizeof(S) };
+};
+
+/**
+ * \brief Helper class to check flexible struct requirements and add common operations.
+ *
+ * Features:
+ *  - expose baseIndex and fieldList (this is normally inherited from the struct, but flexible
+ *    structs cannot be base classes and thus inherited from)
+ *  - disable copy assignment and construction (TODO: this is already done in the FLEX macro for the
+ *    flexible struct, so may not be needed here)
+ */
+template<typename S, int BaseIndex, unsigned TypeIndex>
+struct C2_HIDE C2FlexStructCheck : public C2StructCheck<S, BaseIndex, TypeIndex> {
+public:
+    enum : uint32_t {
+        /// \hideinitializer
+        baseIndex = BaseIndex | C2Param::BaseIndex::_kFlexibleFlag, ///< flexible struct base-index
+    };
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList; // TODO assign here
+
+    // default constructor needed because of the disabled copy constructor
+    inline C2FlexStructCheck() = default;
+
+protected:
+    // cannot copy flexible params
+    C2FlexStructCheck(const C2FlexStructCheck<S, BaseIndex, TypeIndex> &) = delete;
+    C2FlexStructCheck& operator= (const C2FlexStructCheck<S, BaseIndex, TypeIndex> &) = delete;
+
+    // constants used for helper methods
+    enum : uint32_t {
+        /// \hideinitializer
+        flexSize = _C2FlexHelper<S>::flexSize, ///< size of flexible type
+        /// \hideinitializer
+        maxSize = (uint32_t)std::min((size_t)UINT32_MAX, SIZE_MAX), // TODO: is this always u32 max?
+        /// \hideinitializer
+        baseSize = sizeof(S) + sizeof(C2Param), ///< size of the base param
+    };
+
+    /// returns the allocated size of this param with flexCount, or 0 if it would overflow.
+    inline static size_t calcSize(size_t flexCount, size_t size = baseSize) {
+        if (flexCount <= (maxSize - size) / S::flexSize) {
+            return size + S::flexSize * flexCount;
+        }
+        return 0;
+    }
+
+    /// dynamic new operator usable for params of type S
+    inline void* operator new(size_t size, size_t flexCount) noexcept {
+        // TODO: assert(size == baseSize);
+        size = calcSize(flexCount, size);
+        if (size > 0) {
+            return ::operator new(size);
+        }
+        return nullptr;
+    }
+};
+
+// TODO: this probably does not work.
+/// Expose fieldList from subClass;
+template<typename S, int BaseIndex, unsigned TypeIndex>
+const std::initializer_list<const C2FieldDescriptor> C2FlexStructCheck<S, BaseIndex, TypeIndex>::fieldList = S::fieldList;
+
+/// Define From() cast operators for params.
+#define DEFINE_CAST_OPERATORS(_type) \
+    inline static _type* From(C2Param *other) { \
+        return (_type*)C2Param::ifSuitable( \
+                other, sizeof(_type),_type::typeIndex, _type::flexSize, \
+                (_type::typeIndex & T::Index::kDirUndefined) != T::Index::kDirUndefined); \
+    } \
+    inline static const _type* From(const C2Param *other) { \
+        return const_cast<const _type*>(From(const_cast<C2Param *>(other))); \
+    } \
+    inline static _type* From(std::nullptr_t) { return nullptr; } \
+
+/**
+ * Define flexible allocators (alloc_shared or alloc_unique) for flexible params.
+ *  - P::alloc_xyz(flexCount, args...): allocate for given flex-count.
+ *  - P::alloc_xyz(args..., T[]): allocate for size of (and with) init array.
+ *  - P::alloc_xyz(T[]): allocate for size of (and with) init array with no other args.
+ *  - P::alloc_xyz(args..., std::initializer_list<T>): allocate for size of (and with) initializer
+ *    list.
+ */
+#define DEFINE_FLEXIBLE_ALLOC(_type, S, ptr) \
+    template<typename ...Args> \
+    inline static std::ptr##_ptr<_type> alloc_##ptr(size_t flexCount, const Args(&... args)) { \
+        return std::ptr##_ptr<_type>(new(flexCount) _type(flexCount, args...)); \
+    } \
+    /* NOTE: unfortunately this is not supported by clang yet */ \
+    template<typename ...Args, typename U=typename S::flexType, unsigned N> \
+    inline static std::ptr##_ptr<_type> alloc_##ptr(const Args(&... args), const U(&init)[N]) { \
+        return std::ptr##_ptr<_type>(new(N) _type(N, args..., init)); \
+    } \
+    /* so for now, specialize for no args */ \
+    template<typename U=typename S::flexType, unsigned N> \
+    inline static std::ptr##_ptr<_type> alloc_##ptr(const U(&init)[N]) { \
+        return std::ptr##_ptr<_type>(new(N) _type(N, init)); \
+    } \
+    template<typename ...Args, typename U=typename S::flexType> \
+    inline static std::ptr##_ptr<_type> alloc_##ptr( \
+            const Args(&... args), const std::initializer_list<U> &init) { \
+        return std::ptr##_ptr<_type>(new(init.size()) _type(init.size(), args..., init)); \
+    } \
+
+/**
+ * Define flexible methods alloc_shared, alloc_unique and flexCount.
+ */
+#define DEFINE_FLEXIBLE_METHODS(_type, S) \
+    DEFINE_FLEXIBLE_ALLOC(_type, S, shared) \
+    DEFINE_FLEXIBLE_ALLOC(_type, S, unique) \
+    inline size_t flexCount() const { \
+        static_assert(sizeof(_type) == _type::baseSize, "incorrect baseSize"); \
+        size_t sz = this->size(); \
+        if (sz >= sizeof(_type)) { \
+            return (sz - sizeof(_type)) / _type::flexSize; \
+        } \
+        return 0; \
+    } \
+
+/// Mark flexible member variable and make structure flexible.
+#define FLEX(cls, m) \
+    C2_DO_NOT_COPY(cls) \
+private: \
+    C2PARAM_MAKE_FRIENDS \
+    /* default constructor with flexCount */ \
+    inline cls(size_t) : cls() {} \
+    /** \if 0 */ \
+    template<typename, typename> friend struct _C2FlexHelper; \
+    typedef decltype(m) flexMemberType; \
+public: \
+    /* constexpr static flexMemberType cls::* flexMember = &cls::m; */ \
+    typedef typename _C2FlexHelper<flexMemberType>::flexType flexType; \
+    static_assert(\
+            !std::is_void<flexType>::value, \
+            "member is not flexible, or a flexible array of a flexible type"); \
+    enum : uint32_t { flexSize = _C2FlexHelper<flexMemberType>::flexSize }; \
+    /** \endif */ \
+
+/// @}
+
+/**
+ * Global-parameter template.
+ *
+ * Base template to define a global setting/tuning or info based on a structure and
+ * an optional BaseIndex. Global parameters are not tied to a port (input or output).
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields of the wrapped
+ * structure can be accessed directly, and constructors and potential public methods are also
+ * wrapped.
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ */
+template<typename T, typename S, int BaseIndex=S::baseIndex, class Flex=void>
+struct C2_HIDE C2GlobalParam : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+        public C2StructCheck<S, BaseIndex, T::indexFlags | T::Type::kDirGlobal> {
+private:
+    typedef C2GlobalParam<T, S, BaseIndex> _type;
+
+public:
+    /// Wrapper around base structure's constructor.
+    template<typename ...Args>
+    inline C2GlobalParam(const Args(&... args)) : T(sizeof(_type), _type::typeIndex), S(args...) { }
+
+    DEFINE_CAST_OPERATORS(_type)
+};
+
+/**
+ * Global-parameter template for flexible structures.
+ *
+ * Base template to define a global setting/tuning or info based on a flexible structure and
+ * an optional BaseIndex. Global parameters are not tied to a port (input or output).
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped flexible structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields and methods of flexible
+ * structures can be accessed via the m member variable; however, the constructors of the structure
+ * are wrapped directly. (This is because flexible types cannot be subclassed.)
+ */
+template<typename T, typename S, int BaseIndex>
+struct C2_HIDE C2GlobalParam<T, S, BaseIndex, IF_FLEXIBLE(S)>
+    : public T, public C2FlexStructCheck<S, BaseIndex, T::indexFlags | T::Type::kDirGlobal> {
+private:
+    typedef C2GlobalParam<T, S, BaseIndex> _type;
+
+    /// Wrapper around base structure's constructor.
+    template<typename ...Args>
+    inline C2GlobalParam(size_t flexCount, const Args(&... args))
+        : T(_type::calcSize(flexCount), _type::typeIndex), m(flexCount, args...) { }
+
+public:
+    S m; ///< wrapped flexible structure
+
+    DEFINE_FLEXIBLE_METHODS(_type, S)
+    DEFINE_CAST_OPERATORS(_type)
+};
+
+/**
+ * Port-parameter template.
+ *
+ * Base template to define a port setting/tuning or info based on a structure and
+ * an optional BaseIndex. Port parameters are tied to a port (input or output), but not to a
+ * specific stream.
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields of the wrapped
+ * structure can be accessed directly, and constructors and potential public methods are also
+ * wrapped.
+ *
+ * There are 3 flavors of port parameters: unspecified, input and output. Parameters with
+ * unspecified port expose a setPort method, and add an initial port parameter to the constructor.
+ */
+template<typename T, typename S, int BaseIndex=S::baseIndex, class Flex=void>
+struct C2_HIDE C2PortParam : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+        private C2StructCheck<S, BaseIndex, T::indexFlags | T::Index::kDirUndefined> {
+private:
+    typedef C2PortParam<T, S, BaseIndex> _type;
+
+public:
+    /// Default constructor.
+    inline C2PortParam() : T(sizeof(_type), _type::typeIndex) { }
+    template<typename ...Args>
+    /// Wrapper around base structure's constructor while specifying port/direction.
+    inline C2PortParam(bool _output, const Args(&... args))
+        : T(sizeof(_type), _output ? output::typeIndex : input::typeIndex), S(args...) { }
+    /// Set port/direction.
+    inline void setPort(bool output) { C2Param::setPort(output); }
+
+    DEFINE_CAST_OPERATORS(_type)
+
+    /// Specialization for an input port parameter.
+    struct input : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2StructCheck<S, BaseIndex, T::indexFlags | T::Index::kDirInput> {
+        /// Wrapper around base structure's constructor.
+        template<typename ...Args>
+        inline input(const Args(&... args)) : T(sizeof(_type), input::typeIndex), S(args...) { }
+
+        DEFINE_CAST_OPERATORS(input)
+
+    };
+
+    /// Specialization for an output port parameter.
+    struct output : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2StructCheck<S, BaseIndex, T::indexFlags | T::Index::kDirOutput> {
+        /// Wrapper around base structure's constructor.
+        template<typename ...Args>
+        inline output(const Args(&... args)) : T(sizeof(_type), output::typeIndex), S(args...) { }
+
+        DEFINE_CAST_OPERATORS(output)
+    };
+};
+
+/**
+ * Port-parameter template for flexible structures.
+ *
+ * Base template to define a port setting/tuning or info based on a flexible structure and
+ * an optional BaseIndex. Port parameters are tied to a port (input or output), but not to a
+ * specific stream.
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped flexible structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields and methods of flexible
+ * structures can be accessed via the m member variable; however, the constructors of the structure
+ * are wrapped directly. (This is because flexible types cannot be subclassed.)
+ *
+ * There are 3 flavors of port parameters: unspecified, input and output. Parameters with
+ * unspecified port expose a setPort method, and add an initial port parameter to the constructor.
+ */
+template<typename T, typename S, int BaseIndex>
+struct C2_HIDE C2PortParam<T, S, BaseIndex, IF_FLEXIBLE(S)>
+    : public T, public C2FlexStructCheck<S, BaseIndex, T::indexFlags | T::Type::kDirUndefined> {
+private:
+    typedef C2PortParam<T, S, BaseIndex> _type;
+
+    /// Default constructor for basic allocation: new(flexCount) P.
+    inline C2PortParam(size_t flexCount) : T(_type::calcSize(flexCount), _type::typeIndex) { }
+    template<typename ...Args>
+    /// Wrapper around base structure's constructor while also specifying port/direction.
+    inline C2PortParam(size_t flexCount, bool _output, const Args(&... args))
+        : T(_type::calcSize(flexCount), _output ? output::typeIndex : input::typeIndex),
+          m(flexCount, args...) { }
+
+public:
+    /// Set port/direction.
+    inline void setPort(bool output) { C2Param::setPort(output); }
+
+    S m; ///< wrapped flexible structure
+
+    DEFINE_FLEXIBLE_METHODS(_type, S)
+    DEFINE_CAST_OPERATORS(_type)
+
+    /// Specialization for an input port parameter.
+    struct input : public T, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2FlexStructCheck<S, BaseIndex, T::indexFlags | T::Index::kDirInput> {
+    private:
+        /// Wrapper around base structure's constructor while also specifying port/direction.
+        template<typename ...Args>
+        inline input(size_t flexCount, const Args(&... args))
+            : T(_type::calcSize(flexCount), input::typeIndex), m(flexCount, args...) { }
+
+    public:
+        S m; ///< wrapped flexible structure
+
+        DEFINE_FLEXIBLE_METHODS(input, S)
+        DEFINE_CAST_OPERATORS(input)
+    };
+
+    /// Specialization for an output port parameter.
+    struct output : public T, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2FlexStructCheck<S, BaseIndex, T::indexFlags | T::Index::kDirOutput> {
+    private:
+        /// Wrapper around base structure's constructor while also specifying port/direction.
+        template<typename ...Args>
+        inline output(size_t flexCount, const Args(&... args))
+            : T(_type::calcSize(flexCount), output::typeIndex), m(flexCount, args...) { }
+
+    public:
+        S m; ///< wrapped flexible structure
+
+        DEFINE_FLEXIBLE_METHODS(output, S)
+        DEFINE_CAST_OPERATORS(output)
+    };
+};
+
+/**
+ * Stream-parameter template.
+ *
+ * Base template to define a stream setting/tuning or info based on a structure and
+ * an optional BaseIndex. Stream parameters are tied to a specific stream on a port (input or
+ * output).
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields of the wrapped
+ * structure can be accessed directly, and constructors and potential public methods are also
+ * wrapped.
+ *
+ * There are 3 flavors of stream parameters: unspecified port, input and output. All of these expose
+ * a setStream method and an extra initial streamID parameter for the constructor. Moreover,
+ * parameters with unspecified port expose a setPort method, and add an additional initial port
+ * parameter to the constructor.
+ */
+template<typename T, typename S, int BaseIndex=S::baseIndex, class Flex=void>
+struct C2_HIDE C2StreamParam : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+        private C2StructCheck<S, BaseIndex,
+                T::indexFlags | T::Index::kStreamFlag | T::Index::kDirUndefined> {
+private:
+    typedef C2StreamParam<T, S, BaseIndex> _type;
+
+public:
+    /// Default constructor. Port/direction and stream-ID is undefined.
+    inline C2StreamParam() : T(sizeof(_type), _type::typeIndex) { }
+    /// Wrapper around base structure's constructor while also specifying port/direction and
+    /// stream-ID.
+    template<typename ...Args>
+    inline C2StreamParam(bool _output, unsigned stream, const Args(&... args))
+        : T(sizeof(_type), _output ? output::typeIndex : input::typeIndex, stream),
+          S(args...) { }
+    /// Set port/direction.
+    inline void setPort(bool output) { C2Param::setPort(output); }
+    /// Set stream-id. \retval true if the stream-id was successfully set.
+    inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+    DEFINE_CAST_OPERATORS(_type)
+
+    /// Specialization for an input stream parameter.
+    struct input : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2StructCheck<S, BaseIndex,
+                    T::indexFlags | T::Index::kStreamFlag | T::Type::kDirInput> {
+        /// Default constructor. Stream-ID is undefined.
+        inline input() : T(sizeof(_type), input::typeIndex) { }
+        /// Wrapper around base structure's constructor while also specifying stream-ID.
+        template<typename ...Args>
+        inline input(unsigned stream, const Args(&... args))
+            : T(sizeof(_type), input::typeIndex, stream), S(args...) { }
+        /// Set stream-id. \retval true if the stream-id was successfully set.
+        inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+        DEFINE_CAST_OPERATORS(input)
+    };
+
+    /// Specialization for an output stream parameter.
+    struct output : public T, public S, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2StructCheck<S, BaseIndex,
+                    T::indexFlags | T::Index::kStreamFlag | T::Type::kDirOutput> {
+        /// Default constructor. Stream-ID is undefined.
+        inline output() : T(sizeof(_type), output::typeIndex) { }
+        /// Wrapper around base structure's constructor while also specifying stream-ID.
+        template<typename ...Args>
+        inline output(unsigned stream, const Args(&... args))
+            : T(sizeof(_type), output::typeIndex, stream), S(args...) { }
+        /// Set stream-id. \retval true if the stream-id was successfully set.
+        inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+        DEFINE_CAST_OPERATORS(output)
+    };
+};
+
+/**
+ * Stream-parameter template for flexible structures.
+ *
+ * Base template to define a stream setting/tuning or info based on a flexible structure and
+ * an optional BaseIndex. Stream parameters are tied to a specific stream on a port (input or
+ * output).
+ *
+ * \tparam T param type C2Setting, C2Tuning or C2Info
+ * \tparam S wrapped flexible structure
+ * \tparam BaseIndex optional base-index override. Must be specified for common/reused structures.
+ *
+ * Parameters wrap structures by prepending a (parameter) header. The fields and methods of flexible
+ * structures can be accessed via the m member variable; however, the constructors of the structure
+ * are wrapped directly. (This is because flexible types cannot be subclassed.)
+ *
+ * There are 3 flavors of stream parameters: unspecified port, input and output. All of these expose
+ * a setStream method and an extra initial streamID parameter for the constructor. Moreover,
+ * parameters with unspecified port expose a setPort method, and add an additional initial port
+ * parameter to the constructor.
+ */
+template<typename T, typename S, int BaseIndex>
+struct C2_HIDE C2StreamParam<T, S, BaseIndex, IF_FLEXIBLE(S)>
+    : public T, public C2BaseIndexOverride<S, BaseIndex>,
+      private C2FlexStructCheck<S, BaseIndex,
+              T::indexFlags | T::Index::kStreamFlag | T::Index::kDirUndefined> {
+private:
+    typedef C2StreamParam<T, S> _type;
+    /// Default constructor. Port/direction and stream-ID is undefined.
+    inline C2StreamParam(size_t flexCount) : T(_type::calcSize(flexCount), _type::typeIndex, 0u) { }
+    /// Wrapper around base structure's constructor while also specifying port/direction and
+    /// stream-ID.
+    template<typename ...Args>
+    inline C2StreamParam(size_t flexCount, bool _output, unsigned stream, const Args(&... args))
+        : T(_type::calcSize(flexCount), _output ? output::typeIndex : input::typeIndex, stream),
+          m(flexCount, args...) { }
+
+public:
+    S m; ///< wrapped flexible structure
+
+    /// Set port/direction.
+    inline void setPort(bool output) { C2Param::setPort(output); }
+    /// Set stream-id. \retval true if the stream-id was successfully set.
+    inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+    DEFINE_FLEXIBLE_METHODS(_type, S)
+    DEFINE_CAST_OPERATORS(_type)
+
+    /// Specialization for an input stream parameter.
+    struct input : public T, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2FlexStructCheck<S, BaseIndex,
+                    T::indexFlags | T::Index::kStreamFlag | T::Type::kDirInput> {
+    private:
+        /// Default constructor. Stream-ID is undefined.
+        inline input(size_t flexCount) : T(_type::calcSize(flexCount), input::typeIndex) { }
+        /// Wrapper around base structure's constructor while also specifying stream-ID.
+        template<typename ...Args>
+        inline input(size_t flexCount, unsigned stream, const Args(&... args))
+            : T(_type::calcSize(flexCount), input::typeIndex, stream), m(flexCount, args...) { }
+
+    public:
+        S m; ///< wrapped flexible structure
+
+        /// Set stream-id. \retval true if the stream-id was successfully set.
+        inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+        DEFINE_FLEXIBLE_METHODS(input, S)
+        DEFINE_CAST_OPERATORS(input)
+    };
+
+    /// Specialization for an output stream parameter.
+    struct output : public T, public C2BaseIndexOverride<S, BaseIndex>,
+            public C2FlexStructCheck<S, BaseIndex,
+                    T::indexFlags | T::Index::kStreamFlag | T::Type::kDirOutput> {
+    private:
+        /// Default constructor. Stream-ID is undefined.
+        inline output(size_t flexCount) : T(_type::calcSize(flexCount), output::typeIndex) { }
+        /// Wrapper around base structure's constructor while also specifying stream-ID.
+        template<typename ...Args>
+        inline output(size_t flexCount, unsigned stream, const Args(&... args))
+            : T(_type::calcSize(flexCount), output::typeIndex, stream), m(flexCount, args...) { }
+
+    public:
+        S m; ///< wrapped flexible structure
+
+        /// Set stream-id. \retval true if the stream-id was successfully set.
+        inline bool setStream(unsigned stream) { return C2Param::setStream(stream); }
+
+        DEFINE_FLEXIBLE_METHODS(output, S)
+        DEFINE_CAST_OPERATORS(output)
+    };
+};
+
+/* ======================== SIMPLE VALUE PARAMETERS ======================== */
+
+/**
+ * \ingroup internal
+ * A structure template encapsulating a single element with default constructors and no base-index.
+ */
+template<typename T>
+struct C2SimpleValueStruct {
+    T mValue; ///< simple value of the structure
+    // Default constructor.
+    inline C2SimpleValueStruct() = default;
+    // Constructor with an initial value.
+    inline C2SimpleValueStruct(T value) : mValue(value) {}
+    DEFINE_C2STRUCT_NO_BASE(SimpleValue)
+};
+
+// TODO: move this and next to some generic place
+/**
+ * Interface to a block of (mapped) memory containing an array of some type (T).
+ */
+template<typename T>
+struct C2MemoryBlock {
+    /// \returns the number of elements in this block.
+    virtual size_t size() const = 0;
+    /// \returns a const pointer to the start of this block. Care must be taken to not read outside
+    /// the block.
+    virtual const T *data() const = 0; // TODO: should this be friend access only in some C2Memory module?
+    /// \returns a pointer to the start of this block. Care must be taken to not read or write
+    /// outside the block.
+    inline T *data() { return const_cast<T*>(data()); }
+protected:
+    // TODO: for now it should never be deleted as C2MemoryBlock
+    virtual ~C2MemoryBlock() = default;
+};
+
+/**
+ * Interface to a block of memory containing a constant (constexpr) array of some type (T).
+ */
+template<typename T>
+struct C2ConstMemoryBlock : public C2MemoryBlock<T> {
+    virtual const T * data() const { return mData; }
+    virtual size_t size() const { return mSize; }
+
+    /// Constructor.
+    template<unsigned N>
+    inline constexpr C2ConstMemoryBlock(const T(&init)[N]) : mData(init), mSize(N) {}
+
+private:
+    const T *mData;
+    const size_t mSize;
+};
+
+/// \addtogroup internal
+/// @{
+
+/// Helper class to initialize flexible arrays with various initalizers.
+struct _C2ValueArrayHelper {
+    // char[]-s are used as null terminated strings, so the last element is never inited.
+
+    /// Initialize a flexible array using a constexpr memory block.
+    template<typename T>
+    static void init(T(&array)[], size_t arrayLen, const C2MemoryBlock<T> &block) {
+        // reserve last element for terminal 0 for strings
+        if (arrayLen && std::is_same<T, char>::value) {
+            --arrayLen;
+        }
+        if (block.data()) {
+            memcpy(array, block.data(), std::min(arrayLen, block.size()) * sizeof(T));
+        }
+    }
+
+    /// Initialize a flexible array using an initializer list.
+    template<typename T>
+    static void init(T(&array)[], size_t arrayLen, const std::initializer_list<T> &init) {
+        size_t ix = 0;
+        // reserve last element for terminal 0 for strings
+        if (arrayLen && std::is_same<T, char>::value) {
+            --arrayLen;
+        }
+        for (const T &item : init) {
+            if (ix == arrayLen) {
+                break;
+            }
+            array[ix++] = item;
+        }
+    }
+
+    /// Initialize a flexible array using another flexible array.
+    template<typename T, unsigned N>
+    static void init(T(&array)[], size_t arrayLen, const T(&str)[N]) {
+        // reserve last element for terminal 0 for strings
+        if (arrayLen && std::is_same<T, char>::value) {
+            --arrayLen;
+        }
+        if (arrayLen) {
+            strncpy(array, str, std::min(arrayLen, (size_t)N));
+        }
+    }
+};
+
+/**
+ * Specialization for a flexible blob and string arrays. A structure template encapsulating a single
+ * flexible array member with default flexible constructors and no base-index. This type cannot be
+ * constructed on its own as it's size is 0.
+ *
+ * \internal This is different from C2SimpleArrayStruct<T[]> simply because its member has the name
+ * as mValue to reflect this is a single value.
+ */
+template<typename T>
+struct C2SimpleValueStruct<T[]> {
+    static_assert(std::is_same<T, char>::value || std::is_same<T, uint8_t>::value,
+                  "C2SimpleValueStruct<T[]> is only for BLOB or STRING");
+    T mValue[];
+
+    inline C2SimpleValueStruct() = default;
+    DEFINE_C2STRUCT_NO_BASE(SimpleValue)
+    FLEX(C2SimpleValueStruct, mValue)
+
+private:
+    inline C2SimpleValueStruct(size_t flexCount, const C2MemoryBlock<T> &block) {
+        _C2ValueArrayHelper::init(mValue, flexCount, block);
+    }
+
+    inline C2SimpleValueStruct(size_t flexCount, const std::initializer_list<T> &init) {
+        _C2ValueArrayHelper::init(mValue, flexCount, init);
+    }
+
+    template<unsigned N>
+    inline C2SimpleValueStruct(size_t flexCount, const T(&init)[N]) {
+        _C2ValueArrayHelper::init(mValue, flexCount, init);
+    }
+};
+
+/// @}
+
+/**
+ * A structure template encapsulating a single flexible array element of a specific type (T) with
+ * default constructors and no base-index. This type cannot be constructed on its own as it's size
+ * is 0. Instead, it is meant to be used as a parameter, e.g.
+ *
+ *   typedef C2StreamParam<C2Info, C2SimpleArrayStruct<C2MyFancyStruct>,
+ *           kParamIndexMyFancyArrayStreamParam> C2MyFancyArrayStreamInfo;
+ */
+template<typename T>
+struct C2SimpleArrayStruct {
+    static_assert(!std::is_same<T, char>::value && !std::is_same<T, uint8_t>::value,
+                  "use C2SimpleValueStruct<T[]> is for BLOB or STRING");
+
+    T mValues[]; ///< array member
+    /// Default constructor
+    inline C2SimpleArrayStruct() = default;
+    DEFINE_C2STRUCT_NO_BASE(SimpleArray)
+    FLEX(C2SimpleArrayStruct, mValues)
+
+private:
+    /// Construct from a C2MemoryBlock.
+    /// Used only by the flexible parameter allocators (alloc_unique & alloc_shared).
+    inline C2SimpleArrayStruct(size_t flexCount, const C2MemoryBlock<T> &block) {
+        _C2ValueArrayHelper::init(mValues, flexCount, block);
+    }
+
+    /// Construct from an initializer list.
+    /// Used only by the flexible parameter allocators (alloc_unique & alloc_shared).
+    inline C2SimpleArrayStruct(size_t flexCount, const std::initializer_list<T> &init) {
+        _C2ValueArrayHelper::init(mValues, flexCount, init);
+    }
+
+    /// Construct from another flexible array.
+    /// Used only by the flexible parameter allocators (alloc_unique & alloc_shared).
+    template<unsigned N>
+    inline C2SimpleArrayStruct(size_t flexCount, const T(&init)[N]) {
+        _C2ValueArrayHelper::init(mValues, flexCount, init);
+    }
+};
+
+/**
+ * \addtogroup simplevalue Simple value and array structures.
+ * @{
+ *
+ * Simple value structures.
+ *
+ * Structures containing a single simple value. These can be reused to easily define simple
+ * parameters of various types:
+ *
+ *   typedef C2PortParam<C2Tuning, C2Int32Value, kParamIndexMyIntegerPortParam>
+ *           C2MyIntegerPortParamTuning;
+ *
+ * They contain a single member (mValue or mValues) that is described as "value" or "values".
+ */
+/// A 32-bit signed integer parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<int32_t> C2Int32Value;
+/// A 32-bit signed integer array parameter in mValues, described as "values"
+typedef C2SimpleArrayStruct<int32_t> C2Int32Array;
+/// A 32-bit unsigned integer parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<uint32_t> C2Uint32Value;
+/// A 32-bit unsigned integer array parameter in mValues, described as "values"
+typedef C2SimpleArrayStruct<uint32_t> C2Uint32Array;
+/// A 64-bit signed integer parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<int64_t> C2Int64Value;
+/// A 64-bit signed integer array parameter in mValues, described as "values"
+typedef C2SimpleArrayStruct<int64_t> C2Int64Array;
+/// A 64-bit unsigned integer parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<uint64_t> C2Uint64Value;
+/// A 64-bit unsigned integer array parameter in mValues, described as "values"
+typedef C2SimpleArrayStruct<uint64_t> C2Uint64Array;
+/// A float parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<float> C2FloatValue;
+/// A float array parameter in mValues, described as "values"
+typedef C2SimpleArrayStruct<float> C2FloatArray;
+/// A blob flexible parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<uint8_t[]> C2BlobValue;
+/// A string flexible parameter in mValue, described as "value"
+typedef C2SimpleValueStruct<char[]> C2StringValue;
+
+#if 1
+template<typename T>
+const std::initializer_list<const C2FieldDescriptor> C2SimpleValueStruct<T>::fieldList = { C2FIELD(mValue, "value") };
+template<typename T>
+const std::initializer_list<const C2FieldDescriptor> C2SimpleValueStruct<T[]>::fieldList = { C2FIELD(mValue, "value") };
+template<typename T>
+const std::initializer_list<const C2FieldDescriptor> C2SimpleArrayStruct<T>::fieldList = { C2FIELD(mValues, "values") };
+#else
+// This seem to be able to be handled by the template above
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<int32_t>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<uint32_t>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<int64_t>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<uint64_t>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<float>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<uint8_t[]>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleValueStruct<char[]>, { C2FIELD(mValue, "value") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleArrayStruct<int32_t>, { C2FIELD(mValues, "values") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleArrayStruct<uint32_t>, { C2FIELD(mValues, "values") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleArrayStruct<int64_t>, { C2FIELD(mValues, "values") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleArrayStruct<uint64_t>, { C2FIELD(mValues, "values") });
+DESCRIBE_TEMPLATED_C2STRUCT(C2SimpleArrayStruct<float>, { C2FIELD(mValues, "values") });
+#endif
+
+/// @}
+
+/// @}
+
+}  // namespace android
+
+#endif  // C2PARAM_DEF_H_
diff --git a/media/libstagefright/codec2/include/C2Work.h b/media/libstagefright/codec2/include/C2Work.h
new file mode 100644
index 0000000..a42d11a
--- /dev/null
+++ b/media/libstagefright/codec2/include/C2Work.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2WORK_H_
+
+#define C2WORK_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <C2Param.h>
+#include <C2Buffer.h>
+#include <C2Config.h>
+
+#include <memory>
+#include <list>
+#include <vector>
+
+typedef int status_t;
+
+namespace android {
+
+/// \defgroup work Work and data processing
+/// @{
+
+struct C2SettingResult {
+    enum Failure {
+        READ_ONLY,  ///< parameter is read-only and cannot be set
+        MISMATCH,   ///< parameter mismatches input data
+        BAD_VALUE,  ///< parameter does not accept value
+        BAD_TYPE,   ///< parameter is not supported
+        BAD_PORT,   ///< parameter is not supported on the specific port
+        BAD_INDEX,  ///< parameter is not supported on the specific stream
+        CONFLICT,   ///< parameter is in conflict with another setting
+    };
+
+    C2ParamField field;
+    Failure failure;
+    std::unique_ptr<C2FieldSupportedValues> supportedValues; //< if different from normal (e.g. in conflict w/another param or input data)
+    std::list<C2ParamField> conflictingFields;
+};
+
+// ================================================================================================
+//  WORK
+// ================================================================================================
+
+// node_id-s
+typedef uint32_t node_id;
+
+enum flags_t : uint32_t {
+    BUFFERFLAG_CODEC_CONFIG,
+    BUFFERFLAG_DROP_FRAME,
+    BUFFERFLAG_END_OF_STREAM,
+};
+
+enum {
+    kParamIndexWorkOrdinal,
+};
+
+struct C2WorkOrdinalStruct {
+    uint64_t timestamp;
+    uint64_t frame_index;    // submission ordinal on the initial component
+    uint64_t custom_ordinal; // can be given by the component, e.g. decode order
+
+    DEFINE_AND_DESCRIBE_C2STRUCT(WorkOrdinal)
+    C2FIELD(timestamp, "timestamp")
+    C2FIELD(frame_index, "frame-index")
+    C2FIELD(custom_ordinal, "custom-ordinal")
+};
+
+struct C2BufferPack {
+//public:
+    flags_t  flags;
+    C2WorkOrdinalStruct ordinal;
+    std::vector<std::shared_ptr<C2Buffer>> buffers;
+    //< for initial work item, these may also come from the parser - if provided
+    //< for output buffers, these are the responses to requestedInfos
+    std::list<std::unique_ptr<C2Info>>       infos;
+    std::list<std::shared_ptr<C2InfoBuffer>> infoBuffers;
+};
+
+struct C2Worklet {
+//public:
+    // IN
+    node_id component;
+
+    std::list<std::unique_ptr<C2Param>> tunings; //< tunings to be applied before processing this
+                                                 // worklet
+    std::list<C2Param::Type> requestedInfos;
+    std::vector<std::shared_ptr<C2BlockAllocator>> allocators; //< This vector shall be the same size as
+                                                          //< output.buffers.
+
+    // OUT
+    C2BufferPack output;
+    std::list<std::unique_ptr<C2SettingResult>> failures;
+};
+
+/**
+ * This structure holds information about all a single work item.
+ *
+ * This structure shall be passed by the client to the component for the first worklet. As such,
+ * worklets must not be empty. The ownership of this object is passed.
+ *
+ * input:
+ *      The input data to be processed. This is provided by the client with ownership. When the work
+ *      is returned, the input buffer-pack's buffer vector shall contain nullptrs.
+ *
+ * worklets:
+ *      The chain of components and associated allocators, tunings and info requests that the data
+ *      must pass through. If this has more than a single element, the tunnels between successive
+ *      components of the worklet chain must have been (successfully) pre-registered at the time
+ *      the work is submitted. Allocating the output buffers in the worklets is the responsibility
+ *      of each component. Upon work submission, each output buffer-pack shall be an appropriately
+ *      sized vector containing nullptrs. When the work is completed/returned to the client,
+ *
+ * worklets_processed:
+ *      It shall be initialized to 0 by the client when the work is submitted.
+ *      It shall contain the number of worklets that were successfully processed when the work is
+ *      returned. If this is less then the number of worklets, result must not be success.
+ *      It must be in the range of [0, worklets.size()].
+ *
+ * result:
+ *      The final outcome of the work. If 0 when work is returned, it is assumed that all worklets
+ *      have been processed.
+ */
+struct C2Work {
+//public:
+    // pre-chain infos (for portions of a tunneling chain that happend before this work-chain for
+    // this work item - due to framework facilitated (non-tunneled) work-chaining)
+    std::list<std::pair<std::unique_ptr<C2PortMimeConfig>, std::unique_ptr<C2Info>>> preChainInfos;
+    std::list<std::pair<std::unique_ptr<C2PortMimeConfig>, std::unique_ptr<C2Buffer>>> preChainInfoBlobs;
+
+    C2BufferPack input;
+    std::list<std::unique_ptr<C2Worklet>> worklets;
+
+    uint32_t worklets_processed;
+    status_t result;
+};
+
+struct C2WorkOutline {
+//public:
+    C2WorkOrdinalStruct ordinal;
+    std::list<node_id> chain;
+};
+
+/// @}
+
+}  // namespace android
+
+#endif  // C2WORK_H_
diff --git a/media/libstagefright/codec2/tests/Android.mk b/media/libstagefright/codec2/tests/Android.mk
new file mode 100644
index 0000000..49c4253
--- /dev/null
+++ b/media/libstagefright/codec2/tests/Android.mk
@@ -0,0 +1,37 @@
+# Build the unit tests.
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE := codec2_test
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_SRC_FILES := \
+	vndk/C2UtilTest.cpp \
+	C2_test.cpp \
+	C2Param_test.cpp \
+
+LOCAL_SHARED_LIBRARIES := \
+	libcutils \
+	libstagefright_codec2 \
+	liblog
+
+LOCAL_C_INCLUDES := \
+	frameworks/av/media/libstagefright/codec2/include \
+	frameworks/av/media/libstagefright/codec2/vndk/include \
+	$(TOP)/frameworks/native/include/media/openmax \
+
+LOCAL_CFLAGS += -Werror -Wall -std=c++14
+LOCAL_CLANG := true
+
+include $(BUILD_NATIVE_TEST)
+
+# Include subdirectory makefiles
+# ============================================================
+
+# If we're building with ONE_SHOT_MAKEFILE (mm, mmm), then what the framework
+# team really wants is to build the stuff defined by this makefile.
+ifeq (,$(ONE_SHOT_MAKEFILE))
+include $(call first-makefiles-under,$(LOCAL_PATH))
+endif
diff --git a/media/libstagefright/codec2/tests/C2Param_test.cpp b/media/libstagefright/codec2/tests/C2Param_test.cpp
new file mode 100644
index 0000000..ec82c84
--- /dev/null
+++ b/media/libstagefright/codec2/tests/C2Param_test.cpp
@@ -0,0 +1,2687 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "C2Param_test"
+
+#include <gtest/gtest.h>
+
+#include <util/C2ParamUtils.h>
+#include <C2ParamDef.h>
+
+namespace android {
+
+void PrintTo(const _C2FieldId &id, ::std::ostream* os) {
+    *os << "@" << id._mOffset << "+" << id._mSize;
+}
+
+void PrintTo(const C2FieldDescriptor &fd, ::std::ostream *os) {
+    using FD=C2FieldDescriptor;
+    switch (fd.type()) {
+    case FD::INT32: *os << "i32"; break;
+    case FD::INT64: *os << "i64"; break;
+    case FD::UINT32: *os << "u32"; break;
+    case FD::UINT64: *os << "u64"; break;
+    case FD::FLOAT: *os << "float"; break;
+    case FD::STRING: *os << "char"; break;
+    case FD::BLOB: *os << "u8"; break;
+    default:
+        if (fd.type() & FD::STRUCT_FLAG) {
+            *os << "struct-" << (fd.type() & ~FD::STRUCT_FLAG);
+        } else {
+            *os << "type-" << fd.type();
+        }
+    }
+    *os << " " << fd.name();
+    if (fd.length() > 1) {
+        *os << "[" << fd.length() << "]";
+    } else if (fd.length() == 0) {
+        *os << "[]";
+    }
+    *os << " (";
+    PrintTo(fd._mFieldId, os);
+    *os << "*" << fd.length() << ")";
+}
+
+enum C2ParamIndexType {
+    kParamIndexNumber,
+    kParamIndexNumbers,
+    kParamIndexNumber2,
+    kParamIndexVendorStart = C2Param::BaseIndex::kVendorStart,
+    kParamIndexVendorNumbers,
+};
+
+void ffff(int(*)(int)) {}
+
+/* ============================= STRUCT DECLARATION AND DESCRIPTION ============================= */
+
+typedef C2FieldDescriptor FD;
+
+class C2ParamTest : public ::testing::Test {
+};
+
+class C2ParamTest_ParamFieldList
+        : public ::testing::TestWithParam<std::initializer_list<const C2FieldDescriptor>> {
+};
+
+enum {
+    kParamIndexSize,
+    kParamIndexTestA,
+    kParamIndexTestB,
+    kParamIndexTestFlexS32,
+    kParamIndexTestFlexEndS32,
+    kParamIndexTestFlexS64,
+    kParamIndexTestFlexEndS64,
+    kParamIndexTestFlexSize,
+    kParamIndexTestFlexEndSize,
+};
+
+struct C2SizeStruct {
+    int32_t mNumber;
+    int32_t mHeight;
+    enum : uint32_t { baseIndex = kParamIndexSize };                        // <= needed for C2FieldDescriptor
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;  // <= needed for C2FieldDescriptor
+    const static FD::Type TYPE = (FD::Type)(baseIndex | FD::STRUCT_FLAG);
+};
+
+DEFINE_NO_NAMED_VALUES_FOR(C2SizeStruct)
+
+// Test 1. define a structure without any helper methods
+
+bool operator==(const C2FieldDescriptor &a, const C2FieldDescriptor &b) {
+    return a.type() == b.type()
+            && a.length() == b.length()
+            && strcmp(a.name(), b.name()) == 0
+            && a._mFieldId == b._mFieldId;
+}
+
+struct C2TestStruct_A {
+    int32_t mSigned32;
+    int64_t mSigned64[2];
+    uint32_t mUnsigned32[1];
+    uint64_t mUnsigned64;
+    float mFloat;
+    C2SizeStruct mSize[3];
+    uint8_t mBlob[100];
+    char mString[100];
+    bool mYesNo[100];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = kParamIndexTest };
+    // typedef C2TestStruct_A _type;
+} __attribute__((packed));
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_A::fieldList =
+    { { FD::INT32,    1, "s32",   0, 4 },
+      { FD::INT64,    2, "s64",   4, 8 },
+      { FD::UINT32,   1, "u32",  20, 4 },
+      { FD::UINT64,   1, "u64",  24, 8 },
+      { FD::FLOAT,    1, "fp",   32, 4 },
+      { C2SizeStruct::TYPE, 3, "size", 36, 8 },
+      { FD::BLOB,   100, "blob", 60, 1 },
+      { FD::STRING, 100, "str", 160, 1 },
+      { FD::BLOB,   100, "y-n", 260, 1 } };
+
+TEST_P(C2ParamTest_ParamFieldList, VerifyStruct) {
+    std::vector<const C2FieldDescriptor> fields = GetParam(), expected = C2TestStruct_A::fieldList;
+
+    // verify first field descriptor
+    EXPECT_EQ(FD::INT32, fields[0].type());
+    EXPECT_STREQ("s32", fields[0].name());
+    EXPECT_EQ(1u, fields[0].length());
+    EXPECT_EQ(_C2FieldId(0, 4), fields[0]._mFieldId);
+
+    EXPECT_EQ(expected[0], fields[0]);
+    EXPECT_EQ(expected[1], fields[1]);
+    EXPECT_EQ(expected[2], fields[2]);
+    EXPECT_EQ(expected[3], fields[3]);
+    EXPECT_EQ(expected[4], fields[4]);
+    EXPECT_EQ(expected[5], fields[5]);
+    EXPECT_EQ(expected[6], fields[6]);
+    EXPECT_EQ(expected[7], fields[7]);
+    for (size_t i = 8; i < fields.size() && i < expected.size(); ++i) {
+        EXPECT_EQ(expected[i], fields[i]);
+    }
+}
+
+INSTANTIATE_TEST_CASE_P(InitializerList, C2ParamTest_ParamFieldList, ::testing::Values(C2TestStruct_A::fieldList));
+
+// define fields using C2FieldDescriptor pointer constructor
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_A_FD_PTR_fieldList =
+    { C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mSigned32,   "s32"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mSigned64,   "s64"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mUnsigned32, "u32"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mUnsigned64, "u64"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mFloat,      "fp"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mSize,       "size"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mBlob,       "blob"),
+      C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mString,     "str"),
+    //  C2FieldDescriptor(&((C2TestStruct_A*)(nullptr))->mYesNo,      "y-n")
+    };
+
+INSTANTIATE_TEST_CASE_P(PointerConstructor, C2ParamTest_ParamFieldList, ::testing::Values(C2TestStruct_A_FD_PTR_fieldList));
+
+// define fields using C2FieldDescriptor member-pointer constructor
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_A_FD_MEM_PTR_fieldList =
+    { C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mSigned32,   "s32"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mSigned64,   "s64"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mUnsigned32, "u32"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mUnsigned64, "u64"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mFloat,      "fp"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mSize,       "size"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mBlob,       "blob"),
+      C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mString,     "str"),
+    //  C2FieldDescriptor((C2TestStruct_A*)0, &C2TestStruct_A::mYesNo,      "y-n")
+    };
+
+INSTANTIATE_TEST_CASE_P(MemberPointerConstructor, C2ParamTest_ParamFieldList, ::testing::Values(C2TestStruct_A_FD_MEM_PTR_fieldList));
+
+// Test 2. define a structure with two-step helper methods
+
+struct C2TestAStruct {
+    int32_t mSigned32;
+    int64_t mSigned64[2];
+    uint32_t mUnsigned32[1];
+    uint64_t mUnsigned64;
+    float mFloat;
+    C2SizeStruct mSize[3];
+    uint8_t mBlob[100];
+    char mString[100];
+    bool mYesNo[100];
+
+private: // test access level
+    DEFINE_C2STRUCT(TestA)
+} C2_PACK;
+
+DESCRIBE_C2STRUCT(TestA, {
+    C2FIELD(mSigned32, "s32")
+    C2FIELD(mSigned64, "s64")
+    C2FIELD(mUnsigned32, "u32")
+    C2FIELD(mUnsigned64, "u64")
+    C2FIELD(mFloat, "fp")
+    C2FIELD(mSize, "size")
+    C2FIELD(mBlob, "blob")
+    C2FIELD(mString, "str")
+    // C2FIELD(mYesNo, "y-n")
+}) // ; optional
+
+INSTANTIATE_TEST_CASE_P(DescribeStruct2Step, C2ParamTest_ParamFieldList, ::testing::Values(C2TestAStruct::fieldList));
+
+// Test 3. define a structure with one-step helper method
+
+struct C2TestBStruct {
+    int32_t mSigned32;
+    int64_t mSigned64[2];
+    uint32_t mUnsigned32[1];
+    uint64_t mUnsigned64;
+    float mFloat;
+    C2SizeStruct mSize[3];
+    uint8_t mBlob[100];
+    char mString[100];
+    bool mYesNo[100];
+
+private: // test access level
+    DEFINE_AND_DESCRIBE_C2STRUCT(TestB)
+
+    C2FIELD(mSigned32, "s32")
+    C2FIELD(mSigned64, "s64")
+    C2FIELD(mUnsigned32, "u32")
+    C2FIELD(mUnsigned64, "u64")
+    C2FIELD(mFloat, "fp")
+    C2FIELD(mSize, "size")
+    C2FIELD(mBlob, "blob")
+    C2FIELD(mString, "str")
+    // C2FIELD(mYesNo, "y-n")
+};
+
+INSTANTIATE_TEST_CASE_P(DescribeStruct1Step, C2ParamTest_ParamFieldList, ::testing::Values(C2TestBStruct::fieldList));
+
+// Test 4. flexible members
+
+template<typename T>
+class C2ParamTest_FlexParamFieldList : public ::testing::Test {
+protected:
+    using Type=FD::Type;
+
+    // static std::initializer_list<std::initializer_list<const C2FieldDescriptor>>
+    static std::vector<std::vector<const C2FieldDescriptor>>
+            GetLists();
+
+    constexpr static Type flexType =
+            std::is_same<T, int32_t>::value ? FD::INT32 :
+            std::is_same<T, int64_t>::value ? FD::INT64 :
+            std::is_same<T, uint32_t>::value ? FD::UINT32 :
+            std::is_same<T, uint64_t>::value ? FD::UINT64 :
+            std::is_same<T, float>::value ? FD::FLOAT :
+            std::is_same<T, uint8_t>::value ? FD::BLOB :
+            std::is_same<T, char>::value ? FD::STRING :
+            std::is_same<T, C2SizeStruct>::value ? C2SizeStruct::TYPE : (Type)0;
+    constexpr static size_t flexSize = sizeof(T);
+};
+
+typedef ::testing::Types<int32_t, int64_t, C2SizeStruct> FlexTypes;
+TYPED_TEST_CASE(C2ParamTest_FlexParamFieldList, FlexTypes);
+
+TYPED_TEST(C2ParamTest_FlexParamFieldList, VerifyStruct) {
+    for (auto a : this->GetLists()) {
+        std::vector<const C2FieldDescriptor> fields = a;
+        if (fields.size() > 1) {
+            EXPECT_EQ(2u, fields.size());
+            EXPECT_EQ(C2FieldDescriptor(FD::INT32, 1, "s32", 0, 4), fields[0]);
+            EXPECT_EQ(C2FieldDescriptor(this->flexType, 0, "flex", 4, this->flexSize),
+                      fields[1]);
+        } else {
+            EXPECT_EQ(1u, fields.size());
+            EXPECT_EQ(C2FieldDescriptor(this->flexType, 0, "flex", 0, this->flexSize),
+                      fields[0]);
+        }
+    }
+}
+
+struct C2TestStruct_FlexS32 {
+    int32_t mFlex[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = kParamIndexTestFlex, flexSize = 4 };
+    // typedef C2TestStruct_FlexS32 _type;
+    // typedef int32_t flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexS32::fieldList = {
+    { FD::INT32, 0, "flex", 0, 4 }
+};
+
+struct C2TestStruct_FlexEndS32 {
+    int32_t mSigned32;
+    int32_t mFlex[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = kParamIndexTestFlexEnd, flexSize = 4 };
+    // typedef C2TestStruct_FlexEnd _type;
+    // typedef int32_t flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexEndS32::fieldList = {
+    { FD::INT32, 1, "s32", 0, 4 },
+    { FD::INT32, 0, "flex", 4, 4 },
+};
+
+const static std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexEndS32_ptr_fieldList = {
+    C2FieldDescriptor(&((C2TestStruct_FlexEndS32*)0)->mSigned32, "s32"),
+    C2FieldDescriptor(&((C2TestStruct_FlexEndS32*)0)->mFlex, "flex"),
+};
+
+struct C2TestFlexS32Struct {
+    int32_t mFlexSigned32[];
+private: // test access level
+    C2TestFlexS32Struct() {}
+
+    DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(TestFlexS32, mFlexSigned32)
+    C2FIELD(mFlexSigned32, "flex")
+};
+
+struct C2TestFlexEndS32Struct {
+    int32_t mSigned32;
+    int32_t mFlexSigned32[];
+private: // test access level
+    C2TestFlexEndS32Struct() {}
+
+    DEFINE_FLEX_C2STRUCT(TestFlexEndS32, mFlexSigned32)
+} C2_PACK;
+
+DESCRIBE_C2STRUCT(TestFlexEndS32, {
+    C2FIELD(mSigned32, "s32")
+    C2FIELD(mFlexSigned32, "flex")
+}) // ; optional
+
+template<>
+std::vector<std::vector<const C2FieldDescriptor>>
+//std::initializer_list<std::initializer_list<const C2FieldDescriptor>>
+C2ParamTest_FlexParamFieldList<int32_t>::GetLists() {
+    return {
+        C2TestStruct_FlexS32::fieldList,
+        C2TestStruct_FlexEndS32::fieldList,
+        C2TestStruct_FlexEndS32_ptr_fieldList,
+        C2TestFlexS32Struct::fieldList,
+        C2TestFlexEndS32Struct::fieldList,
+    };
+}
+
+struct C2TestStruct_FlexS64 {
+    int64_t mFlexSigned64[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = kParamIndexTestFlexS64, flexSize = 8 };
+    // typedef C2TestStruct_FlexS64 _type;
+    // typedef int64_t flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexS64::fieldList = {
+    { FD::INT64, 0, "flex", 0, 8 }
+};
+
+struct C2TestStruct_FlexEndS64 {
+    int32_t mSigned32;
+    int64_t mSigned64Flex[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = C2TestStruct_FlexEndS64, flexSize = 8 };
+    // typedef C2TestStruct_FlexEndS64 _type;
+    // typedef int64_t flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexEndS64::fieldList = {
+    { FD::INT32, 1, "s32", 0, 4 },
+    { FD::INT64, 0, "flex", 4, 8 },
+};
+
+struct C2TestFlexS64Struct {
+    int64_t mFlexSigned64[];
+    C2TestFlexS64Struct() {}
+
+    DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(TestFlexS64, mFlexSigned64)
+    C2FIELD(mFlexSigned64, "flex")
+};
+
+struct C2TestFlexEndS64Struct {
+    int32_t mSigned32;
+    int64_t mFlexSigned64[];
+    C2TestFlexEndS64Struct() {}
+
+    DEFINE_FLEX_C2STRUCT(TestFlexEndS64, mFlexSigned64)
+} C2_PACK;
+
+DESCRIBE_C2STRUCT(TestFlexEndS64, {
+    C2FIELD(mSigned32, "s32")
+    C2FIELD(mFlexSigned64, "flex")
+}) // ; optional
+
+template<>
+std::vector<std::vector<const C2FieldDescriptor>>
+//std::initializer_list<std::initializer_list<const C2FieldDescriptor>>
+C2ParamTest_FlexParamFieldList<int64_t>::GetLists() {
+    return {
+        C2TestStruct_FlexS64::fieldList,
+        C2TestStruct_FlexEndS64::fieldList,
+        C2TestFlexS64Struct::fieldList,
+        C2TestFlexEndS64Struct::fieldList,
+    };
+}
+
+struct C2TestStruct_FlexSize {
+    C2SizeStruct mFlexSize[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = kParamIndexTestFlexSize, flexSize = 8 };
+    // typedef C2TestStruct_FlexSize _type;
+    // typedef C2SizeStruct flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexSize::fieldList = {
+    { C2SizeStruct::TYPE, 0, "flex", 0, sizeof(C2SizeStruct) }
+};
+
+struct C2TestStruct_FlexEndSize {
+    int32_t mSigned32;
+    C2SizeStruct mSizeFlex[];
+
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    // enum : uint32_t { baseIndex = C2TestStruct_FlexEndSize, flexSize = 8 };
+    // typedef C2TestStruct_FlexEndSize _type;
+    // typedef C2SizeStruct flexType;
+};
+
+const std::initializer_list<const C2FieldDescriptor> C2TestStruct_FlexEndSize::fieldList = {
+    { FD::INT32, 1, "s32", 0, 4 },
+    { C2SizeStruct::TYPE, 0, "flex", 4, sizeof(C2SizeStruct) },
+};
+
+struct C2TestFlexSizeStruct {
+    C2SizeStruct mFlexSize[];
+    C2TestFlexSizeStruct() {}
+
+    DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(TestFlexSize, mFlexSize)
+    C2FIELD(mFlexSize, "flex")
+};
+
+struct C2TestFlexEndSizeStruct {
+    int32_t mSigned32;
+    C2SizeStruct mFlexSize[];
+    C2TestFlexEndSizeStruct() {}
+
+    DEFINE_FLEX_C2STRUCT(TestFlexEndSize, mFlexSize)
+} C2_PACK;
+
+DESCRIBE_C2STRUCT(TestFlexEndSize, {
+    C2FIELD(mSigned32, "s32")
+    C2FIELD(mFlexSize, "flex")
+}) // ; optional
+
+template<>
+std::vector<std::vector<const C2FieldDescriptor>>
+//std::initializer_list<std::initializer_list<const C2FieldDescriptor>>
+C2ParamTest_FlexParamFieldList<C2SizeStruct>::GetLists() {
+    return {
+        C2TestStruct_FlexSize::fieldList,
+        C2TestStruct_FlexEndSize::fieldList,
+        C2TestFlexSizeStruct::fieldList,
+        C2TestFlexEndSizeStruct::fieldList,
+    };
+}
+
+TEST_F(C2ParamTest, FieldId) {
+    // pointer constructor
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId(&((C2TestStruct_A*)0)->mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId(&((C2TestStruct_A*)0)->mSigned64));
+    EXPECT_EQ(_C2FieldId(20, 4), _C2FieldId(&((C2TestStruct_A*)0)->mUnsigned32));
+    EXPECT_EQ(_C2FieldId(24, 8), _C2FieldId(&((C2TestStruct_A*)0)->mUnsigned64));
+    EXPECT_EQ(_C2FieldId(32, 4), _C2FieldId(&((C2TestStruct_A*)0)->mFloat));
+    EXPECT_EQ(_C2FieldId(36, 8), _C2FieldId(&((C2TestStruct_A*)0)->mSize));
+    EXPECT_EQ(_C2FieldId(60, 1), _C2FieldId(&((C2TestStruct_A*)0)->mBlob));
+    EXPECT_EQ(_C2FieldId(160, 1), _C2FieldId(&((C2TestStruct_A*)0)->mString));
+    EXPECT_EQ(_C2FieldId(260, 1), _C2FieldId(&((C2TestStruct_A*)0)->mYesNo));
+
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId(&((C2TestFlexEndSizeStruct*)0)->mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId(&((C2TestFlexEndSizeStruct*)0)->mFlexSize));
+
+    // member pointer constructor
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mSigned64));
+    EXPECT_EQ(_C2FieldId(20, 4), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mUnsigned32));
+    EXPECT_EQ(_C2FieldId(24, 8), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mUnsigned64));
+    EXPECT_EQ(_C2FieldId(32, 4), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mFloat));
+    EXPECT_EQ(_C2FieldId(36, 8), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mSize));
+    EXPECT_EQ(_C2FieldId(60, 1), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mBlob));
+    EXPECT_EQ(_C2FieldId(160, 1), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mString));
+    EXPECT_EQ(_C2FieldId(260, 1), _C2FieldId((C2TestStruct_A*)0, &C2TestStruct_A::mYesNo));
+
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId((C2TestFlexEndSizeStruct*)0, &C2TestFlexEndSizeStruct::mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId((C2TestFlexEndSizeStruct*)0, &C2TestFlexEndSizeStruct::mFlexSize));
+
+    // member pointer sans type pointer
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId(&C2TestStruct_A::mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId(&C2TestStruct_A::mSigned64));
+    EXPECT_EQ(_C2FieldId(20, 4), _C2FieldId(&C2TestStruct_A::mUnsigned32));
+    EXPECT_EQ(_C2FieldId(24, 8), _C2FieldId(&C2TestStruct_A::mUnsigned64));
+    EXPECT_EQ(_C2FieldId(32, 4), _C2FieldId(&C2TestStruct_A::mFloat));
+    EXPECT_EQ(_C2FieldId(36, 8), _C2FieldId(&C2TestStruct_A::mSize));
+    EXPECT_EQ(_C2FieldId(60, 1), _C2FieldId(&C2TestStruct_A::mBlob));
+    EXPECT_EQ(_C2FieldId(160, 1), _C2FieldId(&C2TestStruct_A::mString));
+    EXPECT_EQ(_C2FieldId(260, 1), _C2FieldId(&C2TestStruct_A::mYesNo));
+
+    EXPECT_EQ(_C2FieldId(0, 4), _C2FieldId(&C2TestFlexEndSizeStruct::mSigned32));
+    EXPECT_EQ(_C2FieldId(4, 8), _C2FieldId(&C2TestFlexEndSizeStruct::mFlexSize));
+
+    typedef C2GlobalParam<C2Info, C2TestAStruct> C2TestAInfo;
+    typedef C2GlobalParam<C2Info, C2TestFlexEndSizeStruct> C2TestFlexEndSizeInfo;
+
+    // pointer constructor in C2Param
+    EXPECT_EQ(_C2FieldId(8, 4), _C2FieldId(&((C2TestAInfo*)0)->mSigned32));
+    EXPECT_EQ(_C2FieldId(12, 8), _C2FieldId(&((C2TestAInfo*)0)->mSigned64));
+    EXPECT_EQ(_C2FieldId(28, 4), _C2FieldId(&((C2TestAInfo*)0)->mUnsigned32));
+    EXPECT_EQ(_C2FieldId(32, 8), _C2FieldId(&((C2TestAInfo*)0)->mUnsigned64));
+    EXPECT_EQ(_C2FieldId(40, 4), _C2FieldId(&((C2TestAInfo*)0)->mFloat));
+    EXPECT_EQ(_C2FieldId(44, 8), _C2FieldId(&((C2TestAInfo*)0)->mSize));
+    EXPECT_EQ(_C2FieldId(68, 1), _C2FieldId(&((C2TestAInfo*)0)->mBlob));
+    EXPECT_EQ(_C2FieldId(168, 1), _C2FieldId(&((C2TestAInfo*)0)->mString));
+    EXPECT_EQ(_C2FieldId(268, 1), _C2FieldId(&((C2TestAInfo*)0)->mYesNo));
+
+    EXPECT_EQ(_C2FieldId(8, 4), _C2FieldId(&((C2TestFlexEndSizeInfo*)0)->m.mSigned32));
+    EXPECT_EQ(_C2FieldId(12, 8), _C2FieldId(&((C2TestFlexEndSizeInfo*)0)->m.mFlexSize));
+
+    // member pointer in C2Param
+    EXPECT_EQ(_C2FieldId(8, 4), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mSigned32));
+    EXPECT_EQ(_C2FieldId(12, 8), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mSigned64));
+    EXPECT_EQ(_C2FieldId(28, 4), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mUnsigned32));
+    EXPECT_EQ(_C2FieldId(32, 8), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mUnsigned64));
+    EXPECT_EQ(_C2FieldId(40, 4), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mFloat));
+    EXPECT_EQ(_C2FieldId(44, 8), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mSize));
+    EXPECT_EQ(_C2FieldId(68, 1), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mBlob));
+    EXPECT_EQ(_C2FieldId(168, 1), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mString));
+    EXPECT_EQ(_C2FieldId(268, 1), _C2FieldId((C2TestAInfo*)0, &C2TestAInfo::mYesNo));
+
+    // NOTE: cannot use a member pointer for flex params due to introduction of 'm'
+    // EXPECT_EQ(_C2FieldId(8, 4), _C2FieldId(&C2TestFlexEndSizeInfo::m.mSigned32));
+    // EXPECT_EQ(_C2FieldId(12, 8), _C2FieldId(&C2TestFlexEndSizeInfo::m.mFlexSize));
+
+
+
+}
+
+struct S32 {
+    template<typename T, class B=typename std::remove_extent<T>::type>
+    inline S32(const T*) {
+        static_assert(!std::is_array<T>::value, "should not be an array");
+        static_assert(std::is_same<B, int32_t>::value, "should be int32_t");
+    }
+};
+
+struct FLX {
+    template<typename U, typename T, class B=typename std::remove_extent<T>::type>
+    inline FLX(const T*, const U*) {
+        static_assert(std::is_array<T>::value, "should be an array");
+        static_assert(std::extent<T>::value == 0, "should be an array of 0 extent");
+        static_assert(std::is_same<B, U>::value, "should be type U");
+    }
+};
+
+struct MP {
+    template<typename U, typename T, typename ExpectedU, typename UnexpectedU>
+    inline MP(T U::*, const ExpectedU*, const UnexpectedU*) {
+        static_assert(!std::is_same<U, UnexpectedU>::value, "should not be member pointer of the base type");
+        static_assert(std::is_same<U, ExpectedU>::value, "should be member pointer of the derived type");
+    }
+
+    template<typename U, typename T, typename B, typename D>
+    inline MP(T D::*, const D*) { }
+};
+
+void compiledStatic_arrayTypePropagationTest() {
+    (void)S32(&((C2TestFlexEndS32Struct *)0)->mSigned32);
+    (void)FLX(&((C2TestFlexEndS32Struct *)0)->mFlexSigned32, (int32_t*)0);
+    (void)FLX(&((C2TestFlexS32Struct *)0)->mFlexSigned32, (int32_t*)0);
+
+    typedef C2GlobalParam<C2Info, C2TestAStruct> C2TestAInfo;
+
+    // TRICKY: &derivedClass::baseMember has type of baseClass::*
+    static_assert(std::is_same<decltype(&C2TestAInfo::mSigned32), int32_t C2TestAStruct::*>::value,
+                  "base member pointer should have base class in type");
+
+    // therefore, member pointer expands to baseClass::* in templates
+    (void)MP(&C2TestAInfo::mSigned32,
+             (C2TestAStruct*)0 /* expected */, (C2TestAInfo*)0 /* unexpected */);
+    // but can be cast to derivedClass::*
+    (void)MP((int32_t C2TestAInfo::*)&C2TestAInfo::mSigned32,
+             (C2TestAInfo*)0 /* expected */, (C2TestAStruct*)0 /* unexpected */);
+
+    // TRICKY: baseClass::* does not autoconvert to derivedClass::* even in templates
+    // (void)MP(&C2TestAInfo::mSigned32, (C2TestAInfo*)0);
+}
+
+TEST_F(C2ParamTest, MemberPointerCast) {
+    typedef C2GlobalParam<C2Info, C2TestAStruct> C2TestAInfo;
+
+    static_assert(offsetof(C2TestAInfo, mSigned32) == 8, "offset should be 8");
+    constexpr int32_t C2TestAStruct::* s32ptr = &C2TestAInfo::mSigned32;
+    constexpr int32_t C2TestAInfo::* s32ptr_derived = (int32_t C2TestAStruct::*)&C2TestAInfo::mSigned32;
+    constexpr int32_t C2TestAInfo::* s32ptr_cast2derived = (int32_t C2TestAInfo::*)s32ptr;
+    C2TestAInfo *info = (C2TestAInfo *)256;
+    C2TestAStruct *strukt = (C2TestAStruct *)info;
+    int32_t *info_s32_derived = &(info->*s32ptr_derived);
+    int32_t *info_s32_cast2derived = &(info->*s32ptr_cast2derived);
+    int32_t *info_s32 = &(info->*s32ptr);
+    int32_t *strukt_s32 = &(strukt->*s32ptr);
+
+    EXPECT_EQ(256u, (uintptr_t)info);
+    EXPECT_EQ(264u, (uintptr_t)strukt);
+    EXPECT_EQ(264u, (uintptr_t)info_s32_derived);
+    EXPECT_EQ(264u, (uintptr_t)info_s32_cast2derived);
+    EXPECT_EQ(264u, (uintptr_t)info_s32);
+    EXPECT_EQ(264u, (uintptr_t)strukt_s32);
+
+    typedef C2GlobalParam<C2Info, C2TestFlexEndSizeStruct> C2TestFlexEndSizeInfo;
+    static_assert(offsetof(C2TestFlexEndSizeInfo, m.mSigned32) == 8, "offset should be 8");
+    static_assert(offsetof(C2TestFlexEndSizeInfo, m.mFlexSize) == 12, "offset should be 12");
+}
+
+/* ===================================== PARAM USAGE TESTS ===================================== */
+
+struct C2NumberStruct {
+    int32_t mNumber;
+    C2NumberStruct() {}
+    C2NumberStruct(int32_t _number) : mNumber(_number) {}
+
+    DEFINE_AND_DESCRIBE_C2STRUCT(Number)
+    C2FIELD(mNumber, "number")
+};
+
+struct C2NumbersStruct {
+    int32_t mNumbers[];
+    C2NumbersStruct() {}
+
+    DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(Numbers, mNumbers)
+    C2FIELD(mNumbers, "numbers")
+};
+static_assert(sizeof(C2NumbersStruct) == 0, "C2NumbersStruct has incorrect size");
+
+typedef C2GlobalParam<C2Tuning, C2NumberStruct> C2NumberTuning;
+typedef   C2PortParam<C2Tuning, C2NumberStruct> C2NumberPortTuning;
+typedef C2StreamParam<C2Tuning, C2NumberStruct> C2NumberStreamTuning;
+
+typedef C2GlobalParam<C2Tuning, C2NumbersStruct> C2NumbersTuning;
+typedef   C2PortParam<C2Tuning, C2NumbersStruct> C2NumbersPortTuning;
+typedef C2StreamParam<C2Tuning, C2NumbersStruct> C2NumbersStreamTuning;
+
+//
+#if 0
+
+void test() {
+    C2NumberStruct s(10);
+    (void)C2NumberStruct::fieldList;
+};
+
+typedef C2StreamParam<C2Tuning, C2Int64Value, kParamIndexNumberB> C2NumberConfig4;
+typedef C2PortParam<C2Tuning, C2Int32Value, kParamIndexNumber> C2NumberConfig3;
+typedef C2GlobalParam<C2Tuning, C2StringValue, kParamIndexNumber> C2VideoNameConfig;
+
+void test3() {
+    C2NumberConfig3 s(10);
+    s.mValue = 11;
+    s = 12;
+    (void)C2NumberConfig3::fieldList;
+    std::shared_ptr<C2VideoNameConfig> n = C2VideoNameConfig::alloc_shared(25);
+    strcpy(n->m.mValue, "lajos");
+    C2NumberConfig4 t(false, 0, 11);
+    t.mValue = 15;
+};
+
+struct C2NumbersStruct {
+    int32_t mNumbers[];
+    enum { baseIndex = kParamIndexNumber };
+    const static std::initializer_list<const C2FieldDescriptor> fieldList;
+    C2NumbersStruct() {}
+
+    FLEX(C2NumbersStruct, mNumbers);
+};
+
+static_assert(sizeof(C2NumbersStruct) == 0, "yes");
+
+
+typedef C2GlobalParam<C2Info, C2NumbersStruct> C2NumbersInfo;
+
+const std::initializer_list<const C2FieldDescriptor> C2NumbersStruct::fieldList =
+//    { { FD::INT32, 0, "widths" } };
+    { C2FieldDescriptor(&((C2NumbersStruct*)(nullptr))->mNumbers, "number") };
+
+typedef C2PortParam<C2Tuning, C2NumberStruct> C2NumberConfig;
+
+std::list<const C2FieldDescriptor> myList = C2NumberConfig::fieldList;
+
+    std::unique_ptr<android::C2ParamDescriptor> __test_describe(uint32_t paramType) {
+        std::list<const C2FieldDescriptor> fields = describeC2Params<C2NumberConfig>();
+
+        auto widths = C2NumbersInfo::alloc_shared(5);
+        widths->flexCount();
+        widths->m.mNumbers[4] = 1;
+
+        test();
+        test3();
+
+        C2NumberConfig outputWidth(false, 123);
+
+        C2Param::Index index(paramType);
+        switch (paramType) {
+        case C2NumberConfig::baseIndex:
+            return std::unique_ptr<C2ParamDescriptor>(new C2ParamDescriptor{
+                true /* isRequired */,
+                "number",
+                index,
+            });
+        }
+        return nullptr;
+    }
+
+
+} // namespace android
+
+#endif
+//
+
+template<typename T>
+bool canSetPort(T &o, bool output) { return o.setPort(output); }
+bool canSetPort(...) { return false; }
+
+template<typename S, typename=decltype(((S*)0)->setPort(true))>
+static std::true_type _canCallSetPort(int);
+template<typename>
+static std::false_type _canCallSetPort(...);
+#define canCallSetPort(x) decltype(_canCallSetPort<std::remove_reference<decltype(x)>::type>(0))::value
+
+/* ======================================= STATIC TESTS ======================================= */
+
+static_assert(_C2Comparable<int>::value, "int is not comparable");
+static_assert(!_C2Comparable<void>::value, "void is comparable");
+
+struct C2_HIDE _test0 {
+    bool operator==(const _test0&);
+    bool operator!=(const _test0&);
+};
+struct C2_HIDE _test1 {
+    bool operator==(const _test1&);
+};
+struct C2_HIDE _test2 {
+    bool operator!=(const _test2&);
+};
+static_assert(_C2Comparable<_test0>::value, "class with == and != is not comparable");
+static_assert(_C2Comparable<_test1>::value, "class with == is not comparable");
+static_assert(_C2Comparable<_test2>::value, "class with != is not comparable");
+
+/* ======================================= C2PARAM TESTS ======================================= */
+
+struct _C2ParamInspector {
+    static void StaticTest();
+    static void StaticFlexTest();
+};
+
+// TEST_F(_C2ParamInspector, StaticTest) {
+void _C2ParamInspector::StaticTest() {
+    typedef C2Param::Index I;
+
+    // C2NumberStruct: baseIndex = kIndex                          (args)
+    static_assert(C2NumberStruct::baseIndex == kParamIndexNumber, "bad index");
+    static_assert(sizeof(C2NumberStruct) == 4, "bad size");
+
+    // C2NumberTuning:             kIndex | tun | global           (args)
+    static_assert(C2NumberTuning::baseIndex == kParamIndexNumber, "bad index");
+    static_assert(C2NumberTuning::typeIndex == (kParamIndexNumber | I::kTypeTuning | I::kDirGlobal), "bad index");
+    static_assert(sizeof(C2NumberTuning) == 12, "bad size");
+
+    static_assert(offsetof(C2NumberTuning, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumberTuning, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumberTuning, mNumber) == 8, "bad offset");
+
+    // C2NumberPortTuning:         kIndex | tun | port             (bool, args)
+    static_assert(sizeof(C2NumberPortTuning) == 12, "bad size");
+    // C2NumberPortTuning::input:  kIndex | tun | port | input     (args)
+    // C2NumberPortTuning::output: kIndex | tun | port | output    (args)
+    static_assert(C2NumberPortTuning::input::baseIndex ==
+                  kParamIndexNumber, "bad index");
+    static_assert(C2NumberPortTuning::input::typeIndex ==
+                  (kParamIndexNumber | I::kTypeTuning | I::kDirInput), "bad index");
+    static_assert(C2NumberPortTuning::output::baseIndex ==
+                  kParamIndexNumber, "bad index");
+    static_assert(C2NumberPortTuning::output::typeIndex ==
+                  (kParamIndexNumber | I::kTypeTuning | I::kDirOutput), "bad index");
+    static_assert(sizeof(C2NumberPortTuning::input) == 12, "bad size");
+    static_assert(sizeof(C2NumberPortTuning::output) == 12, "bad size");
+    static_assert(offsetof(C2NumberPortTuning::input, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumberPortTuning::input, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumberPortTuning::input, mNumber) == 8, "bad offset");
+    static_assert(offsetof(C2NumberPortTuning::output, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumberPortTuning::output, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumberPortTuning::output, mNumber) == 8, "bad offset");
+
+    // C2NumberStreamTuning:       kIndex | tun | str              (bool, uint, args)
+    static_assert(sizeof(C2NumberStreamTuning) == 12u, "bad size");
+    // C2NumberStreamTuning::input kIndex | tun | str | input      (int, args)
+    // C2NumberStreamTuning::output kIx   | tun | str | output     (int, args)
+    static_assert(C2NumberStreamTuning::input::baseIndex ==
+                  kParamIndexNumber, "bad index");
+    static_assert(C2NumberStreamTuning::input::typeIndex ==
+                  (kParamIndexNumber | I::kTypeTuning | I::kDirInput | I::kStreamFlag), "bad index");
+    static_assert(C2NumberStreamTuning::output::baseIndex ==
+                  kParamIndexNumber, "bad index");
+    static_assert(C2NumberStreamTuning::output::typeIndex ==
+                  (kParamIndexNumber | I::kTypeTuning | I::kDirOutput | I::kStreamFlag), "bad index");
+    static_assert(sizeof(C2NumberStreamTuning::input) == 12u, "bad size");
+    static_assert(sizeof(C2NumberStreamTuning::output) == 12u, "bad size");
+    static_assert(offsetof(C2NumberStreamTuning::input, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumberStreamTuning::input, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumberStreamTuning::input, mNumber) == 8, "bad offset");
+    static_assert(offsetof(C2NumberStreamTuning::output, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumberStreamTuning::output, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumberStreamTuning::output, mNumber) == 8, "bad offset");
+}
+
+void _C2ParamInspector::StaticFlexTest() {
+    typedef C2Param::Index I;
+
+    // C2NumbersStruct: baseIndex = kIndex                          (args)
+    static_assert(C2NumbersStruct::baseIndex == (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(sizeof(C2NumbersStruct) == 0, "bad size");
+
+    // C2NumbersTuning:             kIndex | tun | global           (args)
+    static_assert(C2NumbersTuning::baseIndex == (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(C2NumbersTuning::typeIndex == (I::kFlexibleFlag | kParamIndexNumbers | I::kTypeTuning | I::kDirGlobal), "bad index");
+    static_assert(sizeof(C2NumbersTuning) == 8, "bad size");
+
+    static_assert(offsetof(C2NumbersTuning, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumbersTuning, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumbersTuning, m.mNumbers) == 8, "bad offset");
+
+    // C2NumbersPortTuning:         kIndex | tun | port             (bool, args)
+    static_assert(sizeof(C2NumbersPortTuning) == 8, "bad size");
+    // C2NumbersPortTuning::input:  kIndex | tun | port | input     (args)
+    // C2NumbersPortTuning::output: kIndex | tun | port | output    (args)
+    static_assert(C2NumbersPortTuning::input::baseIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(C2NumbersPortTuning::input::typeIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers | I::kTypeTuning | I::kDirInput), "bad index");
+    static_assert(C2NumbersPortTuning::output::baseIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(C2NumbersPortTuning::output::typeIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers | I::kTypeTuning | I::kDirOutput), "bad index");
+    static_assert(sizeof(C2NumbersPortTuning::input) == 8, "bad size");
+    static_assert(sizeof(C2NumbersPortTuning::output) == 8, "bad size");
+    static_assert(offsetof(C2NumbersPortTuning::input, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumbersPortTuning::input, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumbersPortTuning::input, m.mNumbers) == 8, "bad offset");
+    static_assert(offsetof(C2NumbersPortTuning::output, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumbersPortTuning::output, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumbersPortTuning::output, m.mNumbers) == 8, "bad offset");
+
+    // C2NumbersStreamTuning:       kIndex | tun | str              (bool, uint, args)
+    static_assert(sizeof(C2NumbersStreamTuning) == 8, "bad size");
+    // C2NumbersStreamTuning::input kIndex | tun | str | input      (int, args)
+    // C2NumbersStreamTuning::output kIx   | tun | str | output     (int, args)
+    static_assert(C2NumbersStreamTuning::input::baseIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(C2NumbersStreamTuning::input::typeIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers | I::kTypeTuning | I::kDirInput | I::kStreamFlag), "bad index");
+    static_assert(C2NumbersStreamTuning::output::baseIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers), "bad index");
+    static_assert(C2NumbersStreamTuning::output::typeIndex ==
+                  (I::kFlexibleFlag | kParamIndexNumbers | I::kTypeTuning | I::kDirOutput | I::kStreamFlag), "bad index");
+    static_assert(sizeof(C2NumbersStreamTuning::input) == 8, "bad size");
+    static_assert(sizeof(C2NumbersStreamTuning::output) == 8, "bad size");
+    static_assert(offsetof(C2NumbersStreamTuning::input, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumbersStreamTuning::input, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumbersStreamTuning::input, m.mNumbers) == 8, "bad offset");
+    static_assert(offsetof(C2NumbersStreamTuning::output, _mSize) == 0, "bad size");
+    static_assert(offsetof(C2NumbersStreamTuning::output, _mIndex) == 4, "bad offset");
+    static_assert(offsetof(C2NumbersStreamTuning::output, m.mNumbers) == 8, "bad offset");
+}
+
+TEST_F(C2ParamTest, ParamOpsTest) {
+    const C2NumberStruct str(100);
+    C2NumberStruct bstr;
+
+    {
+        EXPECT_EQ(100, str.mNumber);
+        bstr.mNumber = 100;
+
+        C2Param::BaseIndex index = C2NumberStruct::baseIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+    }
+
+    const C2NumberTuning tun(100);
+    C2NumberTuning btun;
+
+    {
+        // flags & invariables
+        for (const auto &p : { tun, btun }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+            EXPECT_EQ(12u, p.size());
+
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_TRUE(p.isGlobal());
+            EXPECT_FALSE(p.forInput());
+            EXPECT_FALSE(p.forOutput());
+            EXPECT_FALSE(p.forStream());
+            EXPECT_FALSE(p.forPort());
+        }
+
+        // value
+        EXPECT_EQ(100, tun.mNumber);
+        EXPECT_EQ(0, btun.mNumber);
+        EXPECT_FALSE(tun == btun);
+        EXPECT_FALSE(tun.operator==(btun));
+        EXPECT_TRUE(tun != btun);
+        EXPECT_TRUE(tun.operator!=(btun));
+        btun.mNumber = 100;
+        EXPECT_EQ(tun, btun);
+
+        // index
+        EXPECT_EQ(C2Param::Type(tun.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(tun.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(tun.type(), C2NumberTuning::typeIndex);
+        EXPECT_EQ(tun.stream(), ~0u);
+
+        C2Param::BaseIndex index = C2NumberTuning::baseIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+
+        C2Param::Type type = C2NumberTuning::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_FALSE(type.isFlexible());
+        EXPECT_TRUE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        EXPECT_EQ(C2NumberTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&tun), &tun);
+        EXPECT_EQ(C2NumberPortTuning::From(&tun), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&tun), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&tun), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::From(&tun), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&tun), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&tun), nullptr);
+    }
+
+    const C2NumberPortTuning outp1(true, 100), inp1(false, 100);
+    C2NumberPortTuning boutp1, binp1, binp3(false, 100);
+    const C2NumberPortTuning::input inp2(100);
+    C2NumberPortTuning::input binp2;
+    const C2NumberPortTuning::output outp2(100);
+    C2NumberPortTuning::output boutp2;
+
+    {
+        static_assert(canCallSetPort(binp3), "should be able to");
+        static_assert(canCallSetPort(binp1), "should be able to");
+        static_assert(!canCallSetPort(inp1), "should not be able to (const)");
+        static_assert(!canCallSetPort(inp2), "should not be able to (const & type)");
+        static_assert(!canCallSetPort(binp2), "should not be able to (type)");
+
+        // flags & invariables
+        for (const auto &p : { outp1, inp1, boutp1 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_FALSE(p.forStream());
+            EXPECT_TRUE(p.forPort());
+        }
+        for (const auto &p : { inp2, binp2 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_FALSE(p.forStream());
+            EXPECT_TRUE(p.forPort());
+        }
+        for (const auto &p : { outp2, boutp2 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_FALSE(p.forStream());
+            EXPECT_TRUE(p.forPort());
+        }
+
+        // port specific flags & invariables
+        EXPECT_FALSE(outp1.forInput());
+        EXPECT_TRUE(outp1.forOutput());
+
+        EXPECT_TRUE(inp1.forInput());
+        EXPECT_FALSE(inp1.forOutput());
+
+        for (const auto &p : { outp1, inp1 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+            EXPECT_EQ(100, p.mNumber);
+        }
+        for (const auto &p : { outp2, boutp2 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+
+            EXPECT_FALSE(p.forInput());
+            EXPECT_TRUE(p.forOutput());
+        }
+        for (const auto &p : { inp2, binp2 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+
+            EXPECT_TRUE(p.forInput());
+            EXPECT_FALSE(p.forOutput());
+        }
+        for (const auto &p : { boutp1 } ) {
+            EXPECT_FALSE((bool)p);
+            EXPECT_TRUE(!p);
+
+            EXPECT_FALSE(p.forInput());
+            EXPECT_FALSE(p.forOutput());
+            EXPECT_EQ(0, p.mNumber);
+        }
+
+        // values
+        EXPECT_EQ(100, inp2.mNumber);
+        EXPECT_EQ(100, outp2.mNumber);
+        EXPECT_EQ(0, binp1.mNumber);
+        EXPECT_EQ(0, binp2.mNumber);
+        EXPECT_EQ(0, boutp1.mNumber);
+        EXPECT_EQ(0, boutp2.mNumber);
+
+        EXPECT_TRUE(inp1 != outp1);
+        EXPECT_TRUE(inp1 == inp2);
+        EXPECT_TRUE(outp1 == outp2);
+        EXPECT_TRUE(binp1 == boutp1);
+        EXPECT_TRUE(binp2 != boutp2);
+
+        EXPECT_TRUE(inp1 != binp1);
+        binp1.mNumber = 100;
+        EXPECT_TRUE(inp1 != binp1);
+        binp1.setPort(false /* output */);
+        EXPECT_TRUE((bool)binp1);
+        EXPECT_FALSE(!binp1);
+        EXPECT_TRUE(inp1 == binp1);
+
+        EXPECT_TRUE(inp2 != binp2);
+        binp2.mNumber = 100;
+        EXPECT_TRUE(inp2 == binp2);
+
+        binp1.setPort(true /* output */);
+        EXPECT_TRUE(outp1 == binp1);
+
+        EXPECT_TRUE(outp1 != boutp1);
+        boutp1.mNumber = 100;
+        EXPECT_TRUE(outp1 != boutp1);
+        boutp1.setPort(true /* output */);
+        EXPECT_TRUE((bool)boutp1);
+        EXPECT_FALSE(!boutp1);
+        EXPECT_TRUE(outp1 == boutp1);
+
+        EXPECT_TRUE(outp2 != boutp2);
+        boutp2.mNumber = 100;
+        EXPECT_TRUE(outp2 == boutp2);
+
+        boutp1.setPort(false /* output */);
+        EXPECT_TRUE(inp1 == boutp1);
+
+        // index
+        EXPECT_EQ(C2Param::Type(inp1.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(inp1.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(inp1.type(), C2NumberPortTuning::input::typeIndex);
+        EXPECT_EQ(inp1.stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(inp2.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(inp2.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(inp2.type(), C2NumberPortTuning::input::typeIndex);
+        EXPECT_EQ(inp2.stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(outp1.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outp1.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(outp1.type(), C2NumberPortTuning::output::typeIndex);
+        EXPECT_EQ(outp1.stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(outp2.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outp2.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(outp2.type(), C2NumberPortTuning::output::typeIndex);
+        EXPECT_EQ(outp2.stream(), ~0u);
+
+        C2Param::BaseIndex index = C2NumberPortTuning::input::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+
+        index = C2NumberPortTuning::output::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+
+        C2Param::Type type = C2NumberPortTuning::input::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_FALSE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_TRUE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_TRUE(type.forPort());
+
+        type = C2NumberPortTuning::output::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_FALSE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_TRUE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_TRUE(type.forPort());
+
+        EXPECT_EQ(C2NumberPortTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&inp1), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&inp2), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&outp1), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&outp2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::From(&inp1), &inp1);
+        EXPECT_EQ(C2NumberPortTuning::From(&inp2), (C2NumberPortTuning*)&inp2);
+        EXPECT_EQ(C2NumberPortTuning::From(&outp1), &outp1);
+        EXPECT_EQ(C2NumberPortTuning::From(&outp2), (C2NumberPortTuning*)&outp2);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&inp1), (C2NumberPortTuning::input*)&inp1);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&inp2), &inp2);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&outp1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&outp2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&inp1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&inp2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&outp1), (C2NumberPortTuning::output*)&outp1);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&outp2), &outp2);
+        EXPECT_EQ(C2NumberStreamTuning::From(&inp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::From(&inp2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::From(&outp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::From(&outp2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&inp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&inp2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&outp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&outp2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&inp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&inp2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&outp1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&outp2), nullptr);
+    }
+
+    const C2NumberStreamTuning outs1(true, 1u, 100), ins1(false, 1u, 100);
+    C2NumberStreamTuning bouts1, bins1, bins3(false, 1u, 100);
+    const C2NumberStreamTuning::input ins2(1u, 100);
+    C2NumberStreamTuning::input bins2;
+    const C2NumberStreamTuning::output outs2(1u, 100);
+    C2NumberStreamTuning::output bouts2;
+
+    {
+        static_assert(canCallSetPort(bins3), "should be able to");
+        static_assert(canCallSetPort(bins1), "should be able to");
+        static_assert(!canCallSetPort(ins1), "should not be able to (const)");
+        static_assert(!canCallSetPort(ins2), "should not be able to (const & type)");
+        static_assert(!canCallSetPort(bins2), "should not be able to (type)");
+
+        // flags & invariables
+        for (const auto &p : { outs1, ins1, bouts1 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_TRUE(p.forStream());
+            EXPECT_FALSE(p.forPort());
+        }
+        for (const auto &p : { ins2, bins2 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_TRUE(p.forStream());
+            EXPECT_FALSE(p.forPort());
+        }
+        for (const auto &p : { outs2, bouts2 }) {
+            EXPECT_EQ(12u, p.size());
+            EXPECT_FALSE(p.isVendor());
+            EXPECT_FALSE(p.isFlexible());
+            EXPECT_FALSE(p.isGlobal());
+            EXPECT_TRUE(p.forStream());
+            EXPECT_FALSE(p.forPort());
+        }
+
+        // port specific flags & invariables
+        EXPECT_FALSE(outs1.forInput());
+        EXPECT_TRUE(outs1.forOutput());
+
+        EXPECT_TRUE(ins1.forInput());
+        EXPECT_FALSE(ins1.forOutput());
+
+        for (const auto &p : { outs1, ins1 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+            EXPECT_EQ(100, p.mNumber);
+            EXPECT_EQ(1u, p.stream());
+        }
+        for (const auto &p : { outs2, bouts2 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+
+            EXPECT_FALSE(p.forInput());
+            EXPECT_TRUE(p.forOutput());
+        }
+        for (const auto &p : { ins2, bins2 }) {
+            EXPECT_TRUE((bool)p);
+            EXPECT_FALSE(!p);
+
+            EXPECT_TRUE(p.forInput());
+            EXPECT_FALSE(p.forOutput());
+        }
+        for (const auto &p : { bouts1 } ) {
+            EXPECT_FALSE((bool)p);
+            EXPECT_TRUE(!p);
+
+            EXPECT_FALSE(p.forInput());
+            EXPECT_FALSE(p.forOutput());
+            EXPECT_EQ(0, p.mNumber);
+        }
+
+        // values
+        EXPECT_EQ(100, ins2.mNumber);
+        EXPECT_EQ(100, outs2.mNumber);
+        EXPECT_EQ(0, bins1.mNumber);
+        EXPECT_EQ(0, bins2.mNumber);
+        EXPECT_EQ(0, bouts1.mNumber);
+        EXPECT_EQ(0, bouts2.mNumber);
+
+        EXPECT_EQ(1u, ins2.stream());
+        EXPECT_EQ(1u, outs2.stream());
+        EXPECT_EQ(0u, bins1.stream());
+        EXPECT_EQ(0u, bins2.stream());
+        EXPECT_EQ(0u, bouts1.stream());
+        EXPECT_EQ(0u, bouts2.stream());
+
+        EXPECT_TRUE(ins1 != outs1);
+        EXPECT_TRUE(ins1 == ins2);
+        EXPECT_TRUE(outs1 == outs2);
+        EXPECT_TRUE(bins1 == bouts1);
+        EXPECT_TRUE(bins2 != bouts2);
+
+        EXPECT_TRUE(ins1 != bins1);
+        bins1.mNumber = 100;
+        EXPECT_TRUE(ins1 != bins1);
+        bins1.setPort(false /* output */);
+        EXPECT_TRUE(ins1 != bins1);
+        bins1.setStream(1u);
+        EXPECT_TRUE(ins1 == bins1);
+
+        EXPECT_TRUE(ins2 != bins2);
+        bins2.mNumber = 100;
+        EXPECT_TRUE(ins2 != bins2);
+        bins2.setStream(1u);
+        EXPECT_TRUE(ins2 == bins2);
+
+        bins1.setPort(true /* output */);
+        EXPECT_TRUE(outs1 == bins1);
+
+        EXPECT_TRUE(outs1 != bouts1);
+        bouts1.mNumber = 100;
+        EXPECT_TRUE(outs1 != bouts1);
+        bouts1.setPort(true /* output */);
+        EXPECT_TRUE(outs1 != bouts1);
+        bouts1.setStream(1u);
+        EXPECT_TRUE(outs1 == bouts1);
+
+        EXPECT_TRUE(outs2 != bouts2);
+        bouts2.mNumber = 100;
+        EXPECT_TRUE(outs2 != bouts2);
+        bouts2.setStream(1u);
+        EXPECT_TRUE(outs2 == bouts2);
+
+        bouts1.setPort(false /* output */);
+        EXPECT_TRUE(ins1 == bouts1);
+
+        // index
+        EXPECT_EQ(C2Param::Type(ins1.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(ins1.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(ins1.type(), C2NumberStreamTuning::input::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(ins2.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(ins2.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(ins2.type(), C2NumberStreamTuning::input::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(outs1.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outs1.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(outs1.type(), C2NumberStreamTuning::output::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(outs2.type()).baseIndex(), C2NumberStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outs2.type()).paramIndex(), kParamIndexNumber);
+        EXPECT_EQ(outs2.type(), C2NumberStreamTuning::output::typeIndex);
+
+        C2Param::BaseIndex index = C2NumberStreamTuning::input::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+
+        index = C2NumberStreamTuning::output::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_FALSE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumber);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumber);
+
+        C2Param::Type type = C2NumberStreamTuning::input::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_FALSE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_TRUE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_TRUE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        type = C2NumberStreamTuning::output::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_FALSE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_TRUE(type.forOutput());
+        EXPECT_TRUE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        EXPECT_EQ(C2NumberPortTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&ins1), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&ins2), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&outs1), nullptr);
+        EXPECT_EQ(C2NumberTuning::From(&outs2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::From(&ins1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::From(&ins2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::From(&outs1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::From(&outs2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&ins1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&ins2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&outs1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::input::From(&outs2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&ins1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&ins2), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&outs1), nullptr);
+        EXPECT_EQ(C2NumberPortTuning::output::From(&outs2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::From(&ins1), &ins1);
+        EXPECT_EQ(C2NumberStreamTuning::From(&ins2), (C2NumberStreamTuning*)&ins2);
+        EXPECT_EQ(C2NumberStreamTuning::From(&outs1), &outs1);
+        EXPECT_EQ(C2NumberStreamTuning::From(&outs2), (C2NumberStreamTuning*)&outs2);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&ins1), (C2NumberStreamTuning::input*)&ins1);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&ins2), &ins2);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&outs1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::input::From(&outs2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&ins1), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&ins2), nullptr);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&outs1), (C2NumberStreamTuning::output*)&outs1);
+        EXPECT_EQ(C2NumberStreamTuning::output::From(&outs2), &outs2);
+
+    }
+
+    {
+        uint32_t videoWidth[] = { 12u, C2NumberStreamTuning::output::typeIndex, 100 };
+        C2Param *p1 = C2Param::From(videoWidth, sizeof(videoWidth));
+        EXPECT_NE(p1, nullptr);
+        EXPECT_EQ(12u, p1->size());
+        EXPECT_EQ(p1->type(), C2NumberStreamTuning::output::typeIndex);
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) + 2);
+        EXPECT_EQ(p1, nullptr);
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) - 2);
+        EXPECT_EQ(p1, nullptr);
+
+        p1 = C2Param::From(videoWidth, 3);
+        EXPECT_EQ(p1, nullptr);
+
+        p1 = C2Param::From(videoWidth, 0);
+        EXPECT_EQ(p1, nullptr);
+    }
+}
+
+void StaticTestAddBaseIndex() {
+    struct nobase {};
+    struct base { enum : uint32_t { baseIndex = 1 }; };
+    static_assert(C2AddBaseIndex<nobase, 2>::baseIndex == 2, "should be 2");
+    static_assert(C2AddBaseIndex<base, 1>::baseIndex == 1, "should be 1");
+}
+
+class TestFlexHelper {
+    struct _Flex {
+        int32_t a;
+        char b[];
+        _Flex() {}
+        FLEX(_Flex, b);
+    };
+
+    struct _BoFlex {
+        _Flex a;
+        _BoFlex() {}
+        FLEX(_BoFlex, a);
+    };
+
+    struct _NonFlex {
+    };
+
+
+    static void StaticTest() {
+        static_assert(std::is_same<_C2FlexHelper<char>::flexType, void>::value, "should be void");
+        static_assert(std::is_same<_C2FlexHelper<char[]>::flexType, char>::value, "should be char");
+        static_assert(std::is_same<_C2FlexHelper<_Flex>::flexType, char>::value, "should be char");
+
+        static_assert(std::is_same<_C2FlexHelper<_BoFlex>::flexType, char>::value, "should be void");
+
+        static_assert(_C2Flexible<_Flex>::value, "should be flexible");
+        static_assert(!_C2Flexible<_NonFlex>::value, "should not be flexible");
+    }
+};
+
+TEST_F(C2ParamTest, FlexParamOpsTest) {
+//    const C2NumbersStruct str{100};
+    C2NumbersStruct bstr;
+    {
+//        EXPECT_EQ(100, str->m.mNumbers[0]);
+        (void)&bstr.mNumbers[0];
+
+        C2Param::BaseIndex index = C2NumbersStruct::baseIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+    }
+
+    std::unique_ptr<C2NumbersTuning> tun_ = C2NumbersTuning::alloc_unique(1);
+    tun_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersTuning> tun = std::move(tun_);
+    std::shared_ptr<C2NumbersTuning> btun = C2NumbersTuning::alloc_shared(1);
+
+    {
+        // flags & invariables
+        const C2NumbersTuning *T[] = { tun.get(), btun.get() };
+        for (const auto p : T) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+            EXPECT_EQ(12u, p->size());
+
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_TRUE(p->isGlobal());
+            EXPECT_FALSE(p->forInput());
+            EXPECT_FALSE(p->forOutput());
+            EXPECT_FALSE(p->forStream());
+            EXPECT_FALSE(p->forPort());
+        }
+
+        // value
+        EXPECT_EQ(100, tun->m.mNumbers[0]);
+        EXPECT_EQ(0, btun->m.mNumbers[0]);
+        EXPECT_FALSE(*tun == *btun);
+        EXPECT_FALSE(tun->operator==(*btun));
+        EXPECT_TRUE(*tun != *btun);
+        EXPECT_TRUE(tun->operator!=(*btun));
+        btun->m.mNumbers[0] = 100;
+        EXPECT_EQ(*tun, *btun);
+
+        // index
+        EXPECT_EQ(C2Param::Type(tun->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(tun->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(tun->type(), C2NumbersTuning::typeIndex);
+        EXPECT_EQ(tun->stream(), ~0u);
+
+        C2Param::BaseIndex index = C2NumbersTuning::baseIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+
+        C2Param::Type type = C2NumbersTuning::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_TRUE(type.isFlexible());
+        EXPECT_TRUE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        EXPECT_EQ(C2NumbersTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(tun.get()), tun.get());
+        EXPECT_EQ(C2NumbersPortTuning::From(tun.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(tun.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(tun.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::From(tun.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(tun.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(tun.get()), nullptr);
+    }
+
+    std::unique_ptr<C2NumbersPortTuning> outp1_(C2NumbersPortTuning::alloc_unique(1, true)),
+            inp1_ = C2NumbersPortTuning::alloc_unique(1, false);
+    outp1_->m.mNumbers[0] = 100;
+    inp1_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersPortTuning> outp1 = std::move(outp1_);
+    std::unique_ptr<const C2NumbersPortTuning> inp1 = std::move(inp1_);
+    std::shared_ptr<C2NumbersPortTuning> boutp1(C2NumbersPortTuning::alloc_shared(1)),
+            binp1 = C2NumbersPortTuning::alloc_shared(1),
+            binp3 = C2NumbersPortTuning::alloc_shared(1, false);
+    binp3->m.mNumbers[0] = 100;
+    std::unique_ptr<C2NumbersPortTuning::input> inp2_(C2NumbersPortTuning::input::alloc_unique(1));
+    inp2_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersPortTuning::input> inp2 = std::move(inp2_);
+    std::shared_ptr<C2NumbersPortTuning::input> binp2(C2NumbersPortTuning::input::alloc_shared(1));
+    std::unique_ptr<C2NumbersPortTuning::output> outp2_(C2NumbersPortTuning::output::alloc_unique(1));
+    outp2_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersPortTuning::output> outp2 = std::move(outp2_);
+    std::shared_ptr<C2NumbersPortTuning::output> boutp2(C2NumbersPortTuning::output::alloc_shared(1));
+
+    {
+        static_assert(canCallSetPort(*binp3), "should be able to");
+        static_assert(canCallSetPort(*binp1), "should be able to");
+        static_assert(!canCallSetPort(*inp1), "should not be able to (const)");
+        static_assert(!canCallSetPort(*inp2), "should not be able to (const & type)");
+        static_assert(!canCallSetPort(*binp2), "should not be able to (type)");
+
+        // flags & invariables
+        const C2NumbersPortTuning *P[] = { outp1.get(), inp1.get(), boutp1.get() };
+        for (const auto p : P) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_FALSE(p->forStream());
+            EXPECT_TRUE(p->forPort());
+        }
+        const C2NumbersPortTuning::input *PI[] = { inp2.get(), binp2.get() };
+        for (const auto p : PI) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_FALSE(p->forStream());
+            EXPECT_TRUE(p->forPort());
+        }
+        const C2NumbersPortTuning::output *PO[] = { outp2.get(), boutp2.get() };
+        for (const auto p : PO) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_FALSE(p->forStream());
+            EXPECT_TRUE(p->forPort());
+        }
+
+        // port specific flags & invariables
+        EXPECT_FALSE(outp1->forInput());
+        EXPECT_TRUE(outp1->forOutput());
+
+        EXPECT_TRUE(inp1->forInput());
+        EXPECT_FALSE(inp1->forOutput());
+
+        const C2NumbersPortTuning *P2[] = { outp1.get(), inp1.get() };
+        for (const auto p : P2) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+            EXPECT_EQ(100, p->m.mNumbers[0]);
+        }
+        for (const auto p : PO) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+
+            EXPECT_FALSE(p->forInput());
+            EXPECT_TRUE(p->forOutput());
+        }
+        for (const auto p : PI) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+
+            EXPECT_TRUE(p->forInput());
+            EXPECT_FALSE(p->forOutput());
+        }
+        const C2NumbersPortTuning *P3[] = { boutp1.get() };
+        for (const auto p : P3) {
+            EXPECT_FALSE((bool)(*p));
+            EXPECT_TRUE(!(*p));
+
+            EXPECT_FALSE(p->forInput());
+            EXPECT_FALSE(p->forOutput());
+            EXPECT_EQ(0, p->m.mNumbers[0]);
+        }
+
+        // values
+        EXPECT_EQ(100, inp2->m.mNumbers[0]);
+        EXPECT_EQ(100, outp2->m.mNumbers[0]);
+        EXPECT_EQ(0, binp1->m.mNumbers[0]);
+        EXPECT_EQ(0, binp2->m.mNumbers[0]);
+        EXPECT_EQ(0, boutp1->m.mNumbers[0]);
+        EXPECT_EQ(0, boutp2->m.mNumbers[0]);
+
+        EXPECT_TRUE(*inp1 != *outp1);
+        EXPECT_TRUE(*inp1 == *inp2);
+        EXPECT_TRUE(*outp1 == *outp2);
+        EXPECT_TRUE(*binp1 == *boutp1);
+        EXPECT_TRUE(*binp2 != *boutp2);
+
+        EXPECT_TRUE(*inp1 != *binp1);
+        binp1->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*inp1 != *binp1);
+        binp1->setPort(false /* output */);
+        EXPECT_TRUE((bool)*binp1);
+        EXPECT_FALSE(!*binp1);
+        EXPECT_TRUE(*inp1 == *binp1);
+
+        EXPECT_TRUE(*inp2 != *binp2);
+        binp2->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*inp2 == *binp2);
+
+        binp1->setPort(true /* output */);
+        EXPECT_TRUE(*outp1 == *binp1);
+
+        EXPECT_TRUE(*outp1 != *boutp1);
+        boutp1->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*outp1 != *boutp1);
+        boutp1->setPort(true /* output */);
+        EXPECT_TRUE((bool)*boutp1);
+        EXPECT_FALSE(!*boutp1);
+        EXPECT_TRUE(*outp1 == *boutp1);
+
+        EXPECT_TRUE(*outp2 != *boutp2);
+        boutp2->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*outp2 == *boutp2);
+
+        boutp1->setPort(false /* output */);
+        EXPECT_TRUE(*inp1 == *boutp1);
+
+        // index
+        EXPECT_EQ(C2Param::Type(inp1->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(inp1->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(inp1->type(), C2NumbersPortTuning::input::typeIndex);
+        EXPECT_EQ(inp1->stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(inp2->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(inp2->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(inp2->type(), C2NumbersPortTuning::input::typeIndex);
+        EXPECT_EQ(inp2->stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(outp1->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outp1->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(outp1->type(), C2NumbersPortTuning::output::typeIndex);
+        EXPECT_EQ(outp1->stream(), ~0u);
+
+        EXPECT_EQ(C2Param::Type(outp2->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outp2->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(outp2->type(), C2NumbersPortTuning::output::typeIndex);
+        EXPECT_EQ(outp2->stream(), ~0u);
+
+        C2Param::BaseIndex index = C2NumbersPortTuning::input::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+
+        index = C2NumbersPortTuning::output::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+
+        C2Param::Type type = C2NumbersPortTuning::input::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_TRUE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_TRUE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_TRUE(type.forPort());
+
+        type = C2NumbersPortTuning::output::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_TRUE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_TRUE(type.forOutput());
+        EXPECT_FALSE(type.forStream());
+        EXPECT_TRUE(type.forPort());
+
+        EXPECT_EQ(C2NumbersPortTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(inp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(inp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(outp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(outp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::From(inp1.get()), inp1.get());
+        EXPECT_EQ(C2NumbersPortTuning::From(inp2.get()), (C2NumbersPortTuning*)inp2.get());
+        EXPECT_EQ(C2NumbersPortTuning::From(outp1.get()), outp1.get());
+        EXPECT_EQ(C2NumbersPortTuning::From(outp2.get()), (C2NumbersPortTuning*)outp2.get());
+        EXPECT_EQ(C2NumbersPortTuning::input::From(inp1.get()), (C2NumbersPortTuning::input*)inp1.get());
+        EXPECT_EQ(C2NumbersPortTuning::input::From(inp2.get()), inp2.get());
+        EXPECT_EQ(C2NumbersPortTuning::input::From(outp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(outp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(inp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(inp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(outp1.get()), (C2NumbersPortTuning::output*)outp1.get());
+        EXPECT_EQ(C2NumbersPortTuning::output::From(outp2.get()), outp2.get());
+        EXPECT_EQ(C2NumbersStreamTuning::From(inp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::From(inp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::From(outp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::From(outp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(inp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(inp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(outp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(outp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(inp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(inp2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(outp1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(outp2.get()), nullptr);
+
+    }
+
+    std::unique_ptr<C2NumbersStreamTuning> outs1_(C2NumbersStreamTuning::alloc_unique(1, true, 1u));
+    outs1_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersStreamTuning> outs1 = std::move(outs1_);
+    std::unique_ptr<C2NumbersStreamTuning> ins1_(C2NumbersStreamTuning::alloc_unique(1, false, 1u));
+    ins1_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersStreamTuning> ins1 = std::move(ins1_);
+    std::shared_ptr<C2NumbersStreamTuning> bouts1(C2NumbersStreamTuning::alloc_shared(1));
+    std::shared_ptr<C2NumbersStreamTuning> bins1(C2NumbersStreamTuning::alloc_shared(1));
+    std::shared_ptr<C2NumbersStreamTuning> bins3(C2NumbersStreamTuning::alloc_shared(1, false, 1u));
+    bins3->m.mNumbers[0] = 100;
+    std::unique_ptr<C2NumbersStreamTuning::input> ins2_(C2NumbersStreamTuning::input::alloc_unique(1, 1u));
+    ins2_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersStreamTuning::input> ins2 = std::move(ins2_);
+    std::shared_ptr<C2NumbersStreamTuning::input> bins2(C2NumbersStreamTuning::input::alloc_shared(1));
+    std::unique_ptr<C2NumbersStreamTuning::output> outs2_(C2NumbersStreamTuning::output::alloc_unique(1, 1u));
+    outs2_->m.mNumbers[0] = 100;
+    std::unique_ptr<const C2NumbersStreamTuning::output> outs2 = std::move(outs2_);
+    std::shared_ptr<C2NumbersStreamTuning::output> bouts2(C2NumbersStreamTuning::output::alloc_shared(1));
+
+    {
+        static_assert(canCallSetPort(*bins3), "should be able to");
+        static_assert(canCallSetPort(*bins1), "should be able to");
+        static_assert(!canCallSetPort(*ins1), "should not be able to (const)");
+        static_assert(!canCallSetPort(*ins2), "should not be able to (const & type)");
+        static_assert(!canCallSetPort(*bins2), "should not be able to (type)");
+
+        // flags & invariables
+        const C2NumbersStreamTuning *S[] = { outs1.get(), ins1.get(), bouts1.get() };
+        for (const auto p : S) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_TRUE(p->forStream());
+            EXPECT_FALSE(p->forPort());
+        }
+        const C2NumbersStreamTuning::input *SI[] = { ins2.get(), bins2.get() };
+        for (const auto p : SI) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_TRUE(p->forStream());
+            EXPECT_FALSE(p->forPort());
+        }
+        const C2NumbersStreamTuning::output *SO[] = { outs2.get(), bouts2.get() };
+        for (const auto p : SO) {
+            EXPECT_EQ(12u, p->size());
+            EXPECT_FALSE(p->isVendor());
+            EXPECT_TRUE(p->isFlexible());
+            EXPECT_FALSE(p->isGlobal());
+            EXPECT_TRUE(p->forStream());
+            EXPECT_FALSE(p->forPort());
+        }
+
+        // port specific flags & invariables
+        EXPECT_FALSE(outs1->forInput());
+        EXPECT_TRUE(outs1->forOutput());
+
+        EXPECT_TRUE(ins1->forInput());
+        EXPECT_FALSE(ins1->forOutput());
+
+        const C2NumbersStreamTuning *S2[] = { outs1.get(), ins1.get() };
+        for (const auto p : S2) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+            EXPECT_EQ(100, p->m.mNumbers[0]);
+            EXPECT_EQ(1u, p->stream());
+        }
+        for (const auto p : SO) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+
+            EXPECT_FALSE(p->forInput());
+            EXPECT_TRUE(p->forOutput());
+        }
+        for (const auto p : SI) {
+            EXPECT_TRUE((bool)(*p));
+            EXPECT_FALSE(!(*p));
+
+            EXPECT_TRUE(p->forInput());
+            EXPECT_FALSE(p->forOutput());
+        }
+        const C2NumbersStreamTuning *S3[] = { bouts1.get() };
+        for (const auto p : S3) {
+            EXPECT_FALSE((bool)(*p));
+            EXPECT_TRUE(!(*p));
+
+            EXPECT_FALSE(p->forInput());
+            EXPECT_FALSE(p->forOutput());
+            EXPECT_EQ(0, p->m.mNumbers[0]);
+        }
+
+        // values
+        EXPECT_EQ(100, ins2->m.mNumbers[0]);
+        EXPECT_EQ(100, outs2->m.mNumbers[0]);
+        EXPECT_EQ(0, bins1->m.mNumbers[0]);
+        EXPECT_EQ(0, bins2->m.mNumbers[0]);
+        EXPECT_EQ(0, bouts1->m.mNumbers[0]);
+        EXPECT_EQ(0, bouts2->m.mNumbers[0]);
+
+        EXPECT_EQ(1u, ins2->stream());
+        EXPECT_EQ(1u, outs2->stream());
+        EXPECT_EQ(0u, bins1->stream());
+        EXPECT_EQ(0u, bins2->stream());
+        EXPECT_EQ(0u, bouts1->stream());
+        EXPECT_EQ(0u, bouts2->stream());
+
+        EXPECT_TRUE(*ins1 != *outs1);
+        EXPECT_TRUE(*ins1 == *ins2);
+        EXPECT_TRUE(*outs1 == *outs2);
+        EXPECT_TRUE(*bins1 == *bouts1);
+        EXPECT_TRUE(*bins2 != *bouts2);
+
+        EXPECT_TRUE(*ins1 != *bins1);
+        bins1->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*ins1 != *bins1);
+        bins1->setPort(false /* output */);
+        EXPECT_TRUE(*ins1 != *bins1);
+        bins1->setStream(1u);
+        EXPECT_TRUE(*ins1 == *bins1);
+
+        EXPECT_TRUE(*ins2 != *bins2);
+        bins2->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*ins2 != *bins2);
+        bins2->setStream(1u);
+        EXPECT_TRUE(*ins2 == *bins2);
+
+        bins1->setPort(true /* output */);
+        EXPECT_TRUE(*outs1 == *bins1);
+
+        EXPECT_TRUE(*outs1 != *bouts1);
+        bouts1->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*outs1 != *bouts1);
+        bouts1->setPort(true /* output */);
+        EXPECT_TRUE(*outs1 != *bouts1);
+        bouts1->setStream(1u);
+        EXPECT_TRUE(*outs1 == *bouts1);
+
+        EXPECT_TRUE(*outs2 != *bouts2);
+        bouts2->m.mNumbers[0] = 100;
+        EXPECT_TRUE(*outs2 != *bouts2);
+        bouts2->setStream(1u);
+        EXPECT_TRUE(*outs2 == *bouts2);
+
+        bouts1->setPort(false /* output */);
+        EXPECT_TRUE(*ins1 == *bouts1);
+
+        // index
+        EXPECT_EQ(C2Param::Type(ins1->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(ins1->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(ins1->type(), C2NumbersStreamTuning::input::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(ins2->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(ins2->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(ins2->type(), C2NumbersStreamTuning::input::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(outs1->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outs1->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(outs1->type(), C2NumbersStreamTuning::output::typeIndex);
+
+        EXPECT_EQ(C2Param::Type(outs2->type()).baseIndex(), C2NumbersStruct::baseIndex);
+        EXPECT_EQ(C2Param::Type(outs2->type()).paramIndex(), kParamIndexNumbers);
+        EXPECT_EQ(outs2->type(), C2NumbersStreamTuning::output::typeIndex);
+
+        C2Param::BaseIndex index = C2NumbersStreamTuning::input::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+
+        index = C2NumbersStreamTuning::output::typeIndex;
+        EXPECT_FALSE(index.isVendor());
+        EXPECT_TRUE(index.isFlexible());
+        EXPECT_EQ(index.baseIndex(), kParamIndexNumbers | C2Param::BaseIndex::_kFlexibleFlag);
+        EXPECT_EQ(index.paramIndex(), kParamIndexNumbers);
+
+        C2Param::Type type = C2NumbersStreamTuning::input::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_TRUE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_TRUE(type.forInput());
+        EXPECT_FALSE(type.forOutput());
+        EXPECT_TRUE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        type = C2NumbersStreamTuning::output::typeIndex;
+        EXPECT_FALSE(type.isVendor());
+        EXPECT_TRUE(type.isFlexible());
+        EXPECT_FALSE(type.isGlobal());
+        EXPECT_FALSE(type.forInput());
+        EXPECT_TRUE(type.forOutput());
+        EXPECT_TRUE(type.forStream());
+        EXPECT_FALSE(type.forPort());
+
+        EXPECT_EQ(C2NumbersPortTuning::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(nullptr), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(ins1.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(ins2.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(outs1.get()), nullptr);
+        EXPECT_EQ(C2NumbersTuning::From(outs2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::From(ins1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::From(ins2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::From(outs1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::From(outs2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(ins1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(ins2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(outs1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::input::From(outs2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(ins1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(ins2.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(outs1.get()), nullptr);
+        EXPECT_EQ(C2NumbersPortTuning::output::From(outs2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::From(ins1.get()), ins1.get());
+        EXPECT_EQ(C2NumbersStreamTuning::From(ins2.get()), (C2NumbersStreamTuning*)ins2.get());
+        EXPECT_EQ(C2NumbersStreamTuning::From(outs1.get()), outs1.get());
+        EXPECT_EQ(C2NumbersStreamTuning::From(outs2.get()), (C2NumbersStreamTuning*)outs2.get());
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(ins1.get()), (C2NumbersStreamTuning::input*)ins1.get());
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(ins2.get()), ins2.get());
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(outs1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::input::From(outs2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(ins1.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(ins2.get()), nullptr);
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(outs1.get()), (C2NumbersStreamTuning::output*)outs1.get());
+        EXPECT_EQ(C2NumbersStreamTuning::output::From(outs2.get()), outs2.get());
+
+    }
+
+    {
+        C2Int32Value int32Value(INT32_MIN);
+        static_assert(std::is_same<decltype(int32Value.mValue), int32_t>::value, "should be int32_t");
+        EXPECT_EQ(INT32_MIN, int32Value.mValue);
+        std::list<const C2FieldDescriptor> fields = int32Value.fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::INT32, fields.cbegin()->type());
+        EXPECT_EQ(1u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+    }
+
+    {
+        C2Uint32Value uint32Value(UINT32_MAX);
+        static_assert(std::is_same<decltype(uint32Value.mValue), uint32_t>::value, "should be uint32_t");
+        EXPECT_EQ(UINT32_MAX, uint32Value.mValue);
+        std::list<const C2FieldDescriptor> fields = uint32Value.fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::UINT32, fields.cbegin()->type());
+        EXPECT_EQ(1u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+    }
+
+    {
+        C2Int64Value int64Value(INT64_MIN);
+        static_assert(std::is_same<decltype(int64Value.mValue), int64_t>::value, "should be int64_t");
+        EXPECT_EQ(INT64_MIN, int64Value.mValue);
+        std::list<const C2FieldDescriptor> fields = int64Value.fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::INT64, fields.cbegin()->type());
+        EXPECT_EQ(1u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+    }
+
+    {
+        C2Uint64Value uint64Value(UINT64_MAX);
+        static_assert(std::is_same<decltype(uint64Value.mValue), uint64_t>::value, "should be uint64_t");
+        EXPECT_EQ(UINT64_MAX, uint64Value.mValue);
+        std::list<const C2FieldDescriptor> fields = uint64Value.fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::UINT64, fields.cbegin()->type());
+        EXPECT_EQ(1u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+    }
+
+    {
+        C2FloatValue floatValue(123.4f);
+        static_assert(std::is_same<decltype(floatValue.mValue), float>::value, "should be float");
+        EXPECT_EQ(123.4f, floatValue.mValue);
+        std::list<const C2FieldDescriptor> fields = floatValue.fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::FLOAT, fields.cbegin()->type());
+        EXPECT_EQ(1u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+    }
+
+    {
+        uint8_t initValue[] = "ABCD";
+        typedef C2GlobalParam<C2Setting, C2BlobValue, 0> BlobSetting;
+        std::unique_ptr<BlobSetting> blobValue = BlobSetting::alloc_unique(6, C2ConstMemoryBlock<uint8_t>(initValue));
+        static_assert(std::is_same<decltype(blobValue->m.mValue), uint8_t[]>::value, "should be uint8_t[]");
+        EXPECT_EQ(0, memcmp(blobValue->m.mValue, "ABCD\0", 6));
+        EXPECT_EQ(6u, blobValue->flexCount());
+        std::list<const C2FieldDescriptor> fields = blobValue->fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::BLOB, fields.cbegin()->type());
+        EXPECT_EQ(0u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+
+        blobValue = BlobSetting::alloc_unique(3, C2ConstMemoryBlock<uint8_t>(initValue));
+        EXPECT_EQ(0, memcmp(blobValue->m.mValue, "ABC", 3));
+        EXPECT_EQ(3u, blobValue->flexCount());
+    }
+
+    {
+        constexpr char initValue[] = "ABCD";
+        typedef C2GlobalParam<C2Setting, C2StringValue, 0> StringSetting;
+        std::unique_ptr<StringSetting> stringValue = StringSetting::alloc_unique(6, C2ConstMemoryBlock<char>(initValue));
+        stringValue = StringSetting::alloc_unique(6, initValue);
+        static_assert(std::is_same<decltype(stringValue->m.mValue), char[]>::value, "should be char[]");
+        EXPECT_EQ(0, memcmp(stringValue->m.mValue, "ABCD\0", 6));
+        EXPECT_EQ(6u, stringValue->flexCount());
+        std::list<const C2FieldDescriptor> fields = stringValue->fieldList;
+        EXPECT_EQ(1u, fields.size());
+        EXPECT_EQ(FD::STRING, fields.cbegin()->type());
+        EXPECT_EQ(0u, fields.cbegin()->length());
+        EXPECT_EQ(C2String("value"), fields.cbegin()->name());
+
+        stringValue = StringSetting::alloc_unique(3, C2ConstMemoryBlock<char>(initValue));
+        EXPECT_EQ(0, memcmp(stringValue->m.mValue, "AB", 3));
+        EXPECT_EQ(3u, stringValue->flexCount());
+
+        stringValue = StringSetting::alloc_unique(11, "initValue");
+        EXPECT_EQ(0, memcmp(stringValue->m.mValue, "initValue\0", 11));
+        EXPECT_EQ(11u, stringValue->flexCount());
+
+        stringValue = StringSetting::alloc_unique(initValue);
+        EXPECT_EQ(0, memcmp(stringValue->m.mValue, "ABCD", 5));
+        EXPECT_EQ(5u, stringValue->flexCount());
+
+        stringValue = StringSetting::alloc_unique({ 'A', 'B', 'C', 'D' });
+        EXPECT_EQ(0, memcmp(stringValue->m.mValue, "ABC", 4));
+        EXPECT_EQ(4u, stringValue->flexCount());
+    }
+
+    {
+        uint32_t videoWidth[] = { 12u, C2NumbersStreamTuning::output::typeIndex, 100 };
+        C2Param *p1 = C2Param::From(videoWidth, sizeof(videoWidth));
+        EXPECT_NE(nullptr, p1);
+        EXPECT_EQ(12u, p1->size());
+        EXPECT_EQ(C2NumbersStreamTuning::output::typeIndex, p1->type());
+
+        C2NumbersStreamTuning::output *vst = C2NumbersStreamTuning::output::From(p1);
+        EXPECT_NE(nullptr, vst);
+        if (vst) {
+            EXPECT_EQ(1u, vst->flexCount());
+            EXPECT_EQ(100, vst->m.mNumbers[0]);
+        }
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) + 2);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) - 2);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, 3);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, 0);
+        EXPECT_EQ(nullptr, p1);
+    }
+
+    {
+        uint32_t videoWidth[] = { 16u, C2NumbersPortTuning::input::typeIndex, 101, 102 };
+
+        C2Param *p1 = C2Param::From(videoWidth, sizeof(videoWidth));
+        EXPECT_NE(nullptr, p1);
+        EXPECT_EQ(16u, p1->size());
+        EXPECT_EQ(C2NumbersPortTuning::input::typeIndex, p1->type());
+
+        C2NumbersPortTuning::input *vpt = C2NumbersPortTuning::input::From(p1);
+        EXPECT_NE(nullptr, vpt);
+        if (vpt) {
+            EXPECT_EQ(2u, vpt->flexCount());
+            EXPECT_EQ(101, vpt->m.mNumbers[0]);
+            EXPECT_EQ(102, vpt->m.mNumbers[1]);
+        }
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) + 2);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, sizeof(videoWidth) - 2);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, 3);
+        EXPECT_EQ(nullptr, p1);
+
+        p1 = C2Param::From(videoWidth, 0);
+        EXPECT_EQ(nullptr, p1);
+    }
+}
+
+// ***********************
+
+}
+
+#include <util/C2ParamUtils.h>
+#include <C2Config.h>
+#include <C2Component.h>
+#include <unordered_map>
+
+namespace android {
+
+C2ENUM(
+    MetadataType, int32_t,
+    kInvalid = -1,
+    kNone = 0,
+    kGralloc,
+    kNativeHandle,
+    kANativeWindow,
+    kCamera,
+)
+
+enum {
+    kParamIndexVideoConfig = 0x1234,
+};
+
+struct C2VideoConfigStruct {
+    int32_t mWidth;
+    uint32_t mHeight;
+    MetadataType mMetadataType;
+    int32_t mSupportedFormats[];
+
+    C2VideoConfigStruct() {}
+
+    DEFINE_AND_DESCRIBE_FLEX_C2STRUCT(VideoConfig, mSupportedFormats)
+    C2FIELD(mWidth, "width")
+    C2FIELD(mHeight, "height")
+    C2FIELD(mMetadataType, "metadata-type")
+    C2FIELD(mSupportedFormats, "formats")
+};
+
+typedef C2PortParam<C2Tuning, C2VideoConfigStruct> C2VideoConfigPortTuning;
+
+class MyReflector : public C2ParamReflector {
+private:
+    std::unique_ptr<C2VideoConfigPortTuning::input> inputVideoConfigTuning;
+    std::unique_ptr<C2VideoConfigPortTuning::output> outputVideoConfigTuning;
+
+public:
+    void describeSupportedValues() {
+        C2TypedFieldSupportedValues<int32_t> supportedWidths(16, 1920, 8);
+        C2FieldSupportedValues supportedWidths2(16, 1920, 8);
+
+
+        std::list<C2FieldSupportedValues> supported;
+        //supported.emplace_push(inputVideoConfigTuning->mNumber, range(16, 1920, 8));
+        //supported.emplace_push(inputVideoConfigTuning->mHeight, range(16, 1088, 8));
+        //supported.emplace_push(inputVideoConfigTuning->mMetadataType, all_enums);
+        //supported.emplace_push(inputVideoConfigTuning->mSupportedFormats, { 0, 1, 5, 7 });
+    }
+
+    virtual std::unique_ptr<android::C2StructDescriptor> describe(C2Param::BaseIndex paramType) {
+        switch (paramType.baseIndex()) {
+        case C2VideoConfigPortTuning::baseIndex:
+            return std::unique_ptr<C2StructDescriptor>(new C2StructDescriptor{
+                paramType.baseIndex(),
+                C2VideoConfigPortTuning::fieldList,
+            });
+        }
+        return nullptr;
+    }
+};
+
+class MyComponentInstance : public C2ComponentInterface {
+public:
+    virtual C2String getName() const {
+        /// \todo this seems too specific
+        return "sample.interface";
+    };
+
+    virtual node_id getId() const {
+        /// \todo how are these shared?
+        return 0;
+    }
+
+    virtual status_t commit_sm(
+            const std::vector<C2Param* const> &params,
+            std::vector<std::unique_ptr<C2SettingResult>>* const failures) {
+        (void)params;
+        (void)failures;
+        return C2_UNSUPPORTED;
+    }
+
+    virtual status_t config_nb(
+            const std::vector<C2Param* const> &params,
+            std::vector<std::unique_ptr<C2SettingResult>>* const failures) {
+        (void)params;
+        (void)failures;
+        return C2_UNSUPPORTED;
+    }
+
+    virtual status_t createTunnel_sm(node_id targetComponent) {
+        (void)targetComponent;
+        return C2_UNSUPPORTED;
+    }
+
+    virtual status_t query_nb(
+            const std::vector<C2Param* const> &stackParams,
+            const std::vector<C2Param::Index> &heapParamIndices,
+            std::vector<std::unique_ptr<C2Param>>* const heapParams) const {
+        for (C2Param* const param : stackParams) {
+            if (!*param) { // param is already invalid - remember it
+                continue;
+            }
+
+            // note: this does not handle stream params (should use index...)
+            if (!mMyParams.count(param->type())) {
+                continue; // not my param
+            }
+
+            C2Param & myParam = mMyParams.find(param->type())->second;
+            if (myParam.size() != param->size()) { // incorrect size
+                param->invalidate();
+                continue;
+            }
+
+            param->updateFrom(myParam);
+        }
+
+        for (const C2Param::Index index : heapParamIndices) {
+            if (mMyParams.count(index)) {
+                C2Param & myParam = mMyParams.find(index)->second;
+                std::unique_ptr<C2Param> paramCopy(C2Param::From(&myParam, myParam.size()));
+                heapParams->push_back(std::move(paramCopy));
+            }
+        }
+
+        return C2_OK;
+    }
+
+    std::unordered_map<uint32_t, C2Param &> mMyParams;
+
+    C2ComponentDomainInfo mDomainInfo;
+
+    MyComponentInstance() {
+        mMyParams.insert({mDomainInfo.type(), mDomainInfo});
+    }
+
+    virtual status_t releaseTunnel_sm(node_id targetComponent) {
+        (void)targetComponent;
+        return C2_UNSUPPORTED;
+    }
+
+    class MyParamReflector : public C2ParamReflector {
+        const MyComponentInstance *instance;
+
+    public:
+        MyParamReflector(const MyComponentInstance *i) : instance(i) { }
+
+        virtual std::unique_ptr<C2StructDescriptor> describe(C2Param::BaseIndex paramIndex) {
+            switch (paramIndex.baseIndex()) {
+            case decltype(instance->mDomainInfo)::baseIndex:
+            default:
+                return std::unique_ptr<C2StructDescriptor>(new C2StructDescriptor{
+                    instance->mDomainInfo.type(),
+                    decltype(instance->mDomainInfo)::fieldList,
+                });
+            }
+            return nullptr;
+        }
+    };
+
+    virtual status_t getSupportedValues(
+            const std::vector<const C2ParamField> fields,
+            std::vector<C2FieldSupportedValues>* const values) const {
+        for (const C2ParamField &field : fields) {
+            if (field == C2ParamField(&mDomainInfo, &C2ComponentDomainInfo::mValue)) {
+                values->push_back(C2FieldSupportedValues(
+                    false /* flag */,
+                    &mDomainInfo.mValue
+                    //,
+                    //{(int32_t)C2DomainVideo}
+                ));
+            }
+        }
+        return C2_OK;
+    }
+
+    virtual std::shared_ptr<C2ParamReflector> getParamReflector() const {
+        return std::shared_ptr<C2ParamReflector>(new MyParamReflector(this));
+    }
+
+    virtual status_t getSupportedParams(std::vector<std::shared_ptr<C2ParamDescriptor>> * const params) const {
+        params->push_back(std::make_shared<C2ParamDescriptor>(
+                true /* required */, "_domain", &mDomainInfo));
+        return C2_OK;
+    }
+
+    status_t getSupportedParams2(std::vector<std::shared_ptr<C2ParamDescriptor>> * const params) {
+        params->push_back(std::shared_ptr<C2ParamDescriptor>(
+                new C2ParamDescriptor(true /* required */, "_domain", &mDomainInfo)));
+        return C2_OK;
+    }
+
+};
+
+template<typename E, bool S=std::is_enum<E>::value>
+struct getter {
+    int32_t get(const C2FieldSupportedValues::Primitive &p, int32_t*) {
+        return p.i32;
+    }
+    int64_t get(const C2FieldSupportedValues::Primitive &p, int64_t*) {
+        return p.i64;
+    }
+    uint32_t get(const C2FieldSupportedValues::Primitive &p, uint32_t*) {
+        return p.u32;
+    }
+    uint64_t get(const C2FieldSupportedValues::Primitive &p, uint64_t*) {
+        return p.u64;
+    }
+    float get(const C2FieldSupportedValues::Primitive &p, float*) {
+        return p.fp;
+    }
+};
+
+template<typename E>
+struct getter<E, true> {
+     typename std::underlying_type<E>::type get(const C2FieldSupportedValues::Primitive &p, E*) {
+         using u=typename std::underlying_type<E>::type;
+         return getter<u>().get(p, (u*)0);
+     }
+};
+
+template<typename T, bool E=std::is_enum<T>::value>
+struct lax_underlying_type {
+    typedef typename std::underlying_type<T>::type type;
+};
+
+template<typename T>
+struct lax_underlying_type<T, false> {
+    typedef T type;
+};
+
+template<typename E>
+typename lax_underlying_type<E>::type get(
+        const C2FieldSupportedValues::Primitive &p, E*) {
+    return getter<E>().get(p, (E*)0);
+}
+
+template<typename T>
+void dumpFSV(const C2FieldSupportedValues &sv, T*t) {
+    using namespace std;
+    cout << (std::is_enum<T>::value ? (std::is_signed<typename std::underlying_type<T>::type>::value ? "i" : "u")
+             : std::is_integral<T>::value ? std::is_signed<T>::value ? "i" : "u" : "f")
+        << (8 * sizeof(T));
+    if (sv.type == sv.RANGE) {
+        cout << ".range(" << get(sv.range.min, t);
+        if (get(sv.range.step, t) != std::is_integral<T>::value) {
+            cout << ":" << get(sv.range.step, t);
+        }
+        if (get(sv.range.nom, t) != 1 || get(sv.range.denom, t) != 1) {
+            cout << ":" << get(sv.range.nom, t) << "/" << get(sv.range.denom, t);
+        }
+        cout << get(sv.range.max, t) << ")";
+    }
+    if (sv.values.size()) {
+        cout << (sv.type == sv.FLAGS ? ".flags(" : ".list(");
+        const char *sep = "";
+        for (const C2FieldSupportedValues::Primitive &p : sv.values) {
+            cout << sep << get(p, t);
+            sep = ",";
+        }
+        cout << ")";
+    }
+    cout << endl;
+}
+
+void dumpType(C2Param::Type type) {
+    using namespace std;
+    cout << (type.isVendor() ? "Vendor" : "C2");
+    if (type.forInput()) {
+        cout << "Input";
+    } else if (type.forOutput()) {
+        cout << "Output";
+    } else if (type.forPort() && !type.forStream()) {
+        cout << "Port";
+    }
+    if (type.forStream()) {
+        cout << "Stream";
+    }
+
+    if (type.isFlexible()) {
+        cout << "Flex";
+    }
+
+    cout << type.paramIndex();
+
+    switch (type.kind()) {
+    case C2Param::INFO: cout << "Info"; break;
+    case C2Param::SETTING: cout << "Setting"; break;
+    case C2Param::TUNING: cout << "Tuning"; break;
+    case C2Param::STRUCT: cout << "Struct"; break;
+    default: cout << "Kind" << (int32_t)type.kind(); break;
+    }
+}
+
+void dumpType(C2Param::BaseIndex type) {
+    using namespace std;
+    cout << (type.isVendor() ? "Vendor" : "C2");
+    if (type.isFlexible()) {
+        cout << "Flex";
+    }
+
+    cout << type.paramIndex() << "Struct";
+}
+
+void dumpType(FD::Type type) {
+    using namespace std;
+    switch (type) {
+    case FD::BLOB: cout << "blob "; break;
+    case FD::FLOAT: cout << "float "; break;
+    case FD::INT32: cout << "int32_t "; break;
+    case FD::INT64: cout << "int64_t "; break;
+    case FD::UINT32: cout << "uint32_t "; break;
+    case FD::UINT64: cout << "uint64_t "; break;
+    case FD::STRING: cout << "char "; break;
+    default:
+        cout << "struct ";
+        dumpType((C2Param::Type)type);
+        break;
+    }
+}
+
+void dumpStruct(const C2StructDescriptor &sd) {
+    using namespace std;
+    cout << "struct ";
+    dumpType(sd.baseIndex());
+    cout << " {" << endl;
+    //C2FieldDescriptor &f;
+    for (const C2FieldDescriptor &f : sd) {
+        PrintTo(f, &cout);
+        cout << endl;
+
+        if (f.namedValues().size()) {
+            cout << ".named(";
+            const char *sep = "";
+            for (const FD::named_value_type &p : f.namedValues()) {
+                cout << sep << p.first << "=";
+                switch (f.type()) {
+                case C2Value::INT32: cout << get(p.second, (int32_t *)0); break;
+                case C2Value::INT64: cout << get(p.second, (int64_t *)0); break;
+                case C2Value::UINT32: cout << get(p.second, (uint32_t *)0); break;
+                case C2Value::UINT64: cout << get(p.second, (uint64_t *)0); break;
+                case C2Value::FLOAT: cout << get(p.second, (float *)0); break;
+                default: cout << "???"; break;
+                }
+                sep = ",";
+            }
+            cout << ")";
+        }
+    }
+
+    cout << "};" << endl;
+}
+
+void dumpDesc(const C2ParamDescriptor &pd) {
+    using namespace std;
+    if (pd.isRequired()) {
+        cout << "required ";
+    }
+    if (pd.isPersistent()) {
+        cout << "persistent ";
+    }
+    cout << "struct ";
+    dumpType(pd.type());
+    cout << " " << pd.name() << ";" << endl;
+}
+
+TEST_F(C2ParamTest, ReflectorTest) {
+    C2ComponentDomainInfo domainInfo;
+    std::shared_ptr<C2ComponentInterface> comp(new MyComponentInstance);
+    std::vector<C2FieldSupportedValues> values;
+
+    std::unique_ptr<C2StructDescriptor> desc{
+        comp->getParamReflector()->describe(C2ComponentDomainInfo::indexFlags)};
+    dumpStruct(*desc);
+
+    EXPECT_EQ(
+        C2_OK,
+        comp->getSupportedValues(
+            { C2ParamField(&domainInfo, &C2ComponentDomainInfo::mValue) },
+            &values)
+    );
+
+    for (const C2FieldSupportedValues &sv : values) {
+        dumpFSV(sv, &domainInfo.mValue);
+    }
+}
+
+C2ENUM(Enum1, uint32_t,
+    Enum1Value1,
+    Enum1Value2,
+    Enum1Value4 = Enum1Value2 + 2,
+);
+
+C2ENUM_CUSTOM_PREFIX(Enum2, uint32_t, "Enum",
+    Enum2Value1,
+    Enum2Value2,
+    Enum2Value4 = Enum1Value2 + 2,
+);
+
+C2ENUM_CUSTOM_NAMES(Enum3, uint8_t,
+    ({ { "value1", Enum3Value1 },
+       { "value2", Enum3Value2 },
+       { "value4", Enum3Value4 },
+       { "invalid", Invalid } }),
+    Enum3Value1,
+    Enum3Value2,
+    Enum3Value4 = Enum3Value2 + 2,
+    Invalid,
+);
+
+TEST_F(C2ParamTest, EnumUtilsTest) {
+    std::vector<std::pair<C2String, Enum3>> pairs ( { { "value1", Enum3Value1 },
+      { "value2", Enum3Value2 },
+      { "value4", Enum3Value4 },
+      { "invalid", Invalid } });
+    Enum3 e3;
+    FD::namedValuesFor(e3);
+}
+
+TEST_F(C2ParamTest, ParamUtilsTest) {
+    // upper case
+    EXPECT_EQ("yes", C2ParamUtils::camelCaseToDashed("YES"));
+    EXPECT_EQ("no", C2ParamUtils::camelCaseToDashed("NO"));
+    EXPECT_EQ("yes-no", C2ParamUtils::camelCaseToDashed("YES_NO"));
+    EXPECT_EQ("yes-no", C2ParamUtils::camelCaseToDashed("YES__NO"));
+    EXPECT_EQ("a2dp", C2ParamUtils::camelCaseToDashed("A2DP"));
+    EXPECT_EQ("mp2-ts", C2ParamUtils::camelCaseToDashed("MP2_TS"));
+    EXPECT_EQ("block-2d", C2ParamUtils::camelCaseToDashed("BLOCK_2D"));
+    EXPECT_EQ("mpeg-2-ts", C2ParamUtils::camelCaseToDashed("MPEG_2_TS"));
+    EXPECT_EQ("_hidden-value", C2ParamUtils::camelCaseToDashed("_HIDDEN_VALUE"));
+    EXPECT_EQ("__hidden-value2", C2ParamUtils::camelCaseToDashed("__HIDDEN_VALUE2"));
+    EXPECT_EQ("__hidden-value-2", C2ParamUtils::camelCaseToDashed("__HIDDEN_VALUE_2"));
+
+    // camel case
+    EXPECT_EQ("yes", C2ParamUtils::camelCaseToDashed("Yes"));
+    EXPECT_EQ("no", C2ParamUtils::camelCaseToDashed("No"));
+    EXPECT_EQ("yes-no", C2ParamUtils::camelCaseToDashed("YesNo"));
+    EXPECT_EQ("yes-no", C2ParamUtils::camelCaseToDashed("Yes_No"));
+    EXPECT_EQ("mp2-ts", C2ParamUtils::camelCaseToDashed("MP2Ts"));
+    EXPECT_EQ("block-2d", C2ParamUtils::camelCaseToDashed("Block2D"));
+    EXPECT_EQ("mpeg-2-ts", C2ParamUtils::camelCaseToDashed("Mpeg2ts"));
+    EXPECT_EQ("_hidden-value", C2ParamUtils::camelCaseToDashed("_HiddenValue"));
+    EXPECT_EQ("__hidden-value-2", C2ParamUtils::camelCaseToDashed("__HiddenValue2"));
+
+    // mixed case
+    EXPECT_EQ("mp2t-s", C2ParamUtils::camelCaseToDashed("MP2T_s"));
+    EXPECT_EQ("block-2d", C2ParamUtils::camelCaseToDashed("Block_2D"));
+    EXPECT_EQ("block-2-d", C2ParamUtils::camelCaseToDashed("Block2_D"));
+    EXPECT_EQ("mpeg-2-ts", C2ParamUtils::camelCaseToDashed("Mpeg_2ts"));
+    EXPECT_EQ("mpeg-2-ts", C2ParamUtils::camelCaseToDashed("Mpeg_2_TS"));
+    EXPECT_EQ("_hidden-value", C2ParamUtils::camelCaseToDashed("_Hidden__VALUE"));
+    EXPECT_EQ("__hidden-value-2", C2ParamUtils::camelCaseToDashed("__HiddenValue_2"));
+    EXPECT_EQ("_2", C2ParamUtils::camelCaseToDashed("_2"));
+    EXPECT_EQ("__23", C2ParamUtils::camelCaseToDashed("__23"));
+}
+
+TEST_F(C2ParamTest, C2ValueTest) {
+    C2Value val;
+    int32_t i32 = -32;
+    int64_t i64 = -64;
+    uint32_t u32 = 32;
+    uint64_t u64 = 64;
+    float fp = 1.5f;
+
+    EXPECT_EQ(C2Value::NO_INIT, val.type());
+    EXPECT_EQ(false, val.get(&i32));
+    EXPECT_EQ(-32, i32);
+    EXPECT_EQ(false, val.get(&i64));
+    EXPECT_EQ(-64, i64);
+    EXPECT_EQ(false, val.get(&u32));
+    EXPECT_EQ(32u, u32);
+    EXPECT_EQ(false, val.get(&u64));
+    EXPECT_EQ(64u, u64);
+    EXPECT_EQ(false, val.get(&fp));
+    EXPECT_EQ(1.5f, fp);
+
+    val = int32_t(-3216);
+    EXPECT_EQ(C2Value::INT32, val.type());
+    EXPECT_EQ(true, val.get(&i32));
+    EXPECT_EQ(-3216, i32);
+    EXPECT_EQ(false, val.get(&i64));
+    EXPECT_EQ(-64, i64);
+    EXPECT_EQ(false, val.get(&u32));
+    EXPECT_EQ(32u, u32);
+    EXPECT_EQ(false, val.get(&u64));
+    EXPECT_EQ(64u, u64);
+    EXPECT_EQ(false, val.get(&fp));
+    EXPECT_EQ(1.5f, fp);
+
+    val = uint32_t(3216);
+    EXPECT_EQ(C2Value::UINT32, val.type());
+    EXPECT_EQ(false, val.get(&i32));
+    EXPECT_EQ(-3216, i32);
+    EXPECT_EQ(false, val.get(&i64));
+    EXPECT_EQ(-64, i64);
+    EXPECT_EQ(true, val.get(&u32));
+    EXPECT_EQ(3216u, u32);
+    EXPECT_EQ(false, val.get(&u64));
+    EXPECT_EQ(64u, u64);
+    EXPECT_EQ(false, val.get(&fp));
+    EXPECT_EQ(1.5f, fp);
+
+    val = int64_t(-6432);
+    EXPECT_EQ(C2Value::INT64, val.type());
+    EXPECT_EQ(false, val.get(&i32));
+    EXPECT_EQ(-3216, i32);
+    EXPECT_EQ(true, val.get(&i64));
+    EXPECT_EQ(-6432, i64);
+    EXPECT_EQ(false, val.get(&u32));
+    EXPECT_EQ(3216u, u32);
+    EXPECT_EQ(false, val.get(&u64));
+    EXPECT_EQ(64u, u64);
+    EXPECT_EQ(false, val.get(&fp));
+    EXPECT_EQ(1.5f, fp);
+
+    val = uint64_t(6432);
+    EXPECT_EQ(C2Value::UINT64, val.type());
+    EXPECT_EQ(false, val.get(&i32));
+    EXPECT_EQ(-3216, i32);
+    EXPECT_EQ(false, val.get(&i64));
+    EXPECT_EQ(-6432, i64);
+    EXPECT_EQ(false, val.get(&u32));
+    EXPECT_EQ(3216u, u32);
+    EXPECT_EQ(true, val.get(&u64));
+    EXPECT_EQ(6432u, u64);
+    EXPECT_EQ(false, val.get(&fp));
+    EXPECT_EQ(1.5f, fp);
+
+    val = 15.25f;
+    EXPECT_EQ(C2Value::FLOAT, val.type());
+    EXPECT_EQ(false, val.get(&i32));
+    EXPECT_EQ(-3216, i32);
+    EXPECT_EQ(false, val.get(&i64));
+    EXPECT_EQ(-6432, i64);
+    EXPECT_EQ(false, val.get(&u32));
+    EXPECT_EQ(3216u, u32);
+    EXPECT_EQ(false, val.get(&u64));
+    EXPECT_EQ(6432u, u64);
+    EXPECT_EQ(true, val.get(&fp));
+    EXPECT_EQ(15.25f, fp);
+}
+
+} // namespace android
diff --git a/media/libstagefright/codec2/tests/C2_test.cpp b/media/libstagefright/codec2/tests/C2_test.cpp
new file mode 100644
index 0000000..92a3d91
--- /dev/null
+++ b/media/libstagefright/codec2/tests/C2_test.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "C2_test"
+
+#include <gtest/gtest.h>
+
+#include <C2.h>
+
+namespace android {
+
+/* ======================================= STATIC TESTS ======================================= */
+
+template<int N>
+struct c2_const_checker
+{
+    inline constexpr static int num() { return N; }
+};
+
+constexpr auto min_i32_i32 = c2_min(int32_t(1), int32_t(2));
+static_assert(std::is_same<decltype(min_i32_i32), const int32_t>::value, "should be int32_t");
+constexpr auto min_i32_i64 = c2_min(int32_t(3), int64_t(2));
+static_assert(std::is_same<decltype(min_i32_i64), const int64_t>::value, "should be int64_t");
+constexpr auto min_i8_i32 = c2_min(int8_t(0xff), int32_t(0xffffffff));
+static_assert(std::is_same<decltype(min_i8_i32), const int32_t>::value, "should be int32_t");
+
+static_assert(c2_const_checker<min_i32_i32>::num() == 1, "should be 1");
+static_assert(c2_const_checker<min_i32_i64>::num() == 2, "should be 2");
+static_assert(c2_const_checker<min_i8_i32>::num() == 0xffffffff, "should be 0xffffffff");
+
+constexpr auto min_u32_u32 = c2_min(uint32_t(1), uint32_t(2));
+static_assert(std::is_same<decltype(min_u32_u32), const uint32_t>::value, "should be uint32_t");
+constexpr auto min_u32_u64 = c2_min(uint32_t(3), uint64_t(2));
+static_assert(std::is_same<decltype(min_u32_u64), const uint32_t>::value, "should be uint32_t");
+constexpr auto min_u32_u8 = c2_min(uint32_t(0xffffffff), uint8_t(0xff));
+static_assert(std::is_same<decltype(min_u32_u8), const uint8_t>::value, "should be uint8_t");
+
+static_assert(c2_const_checker<min_u32_u32>::num() == 1, "should be 1");
+static_assert(c2_const_checker<min_u32_u64>::num() == 2, "should be 2");
+static_assert(c2_const_checker<min_u32_u8>::num() == 0xff, "should be 0xff");
+
+constexpr auto max_i32_i32 = c2_max(int32_t(1), int32_t(2));
+static_assert(std::is_same<decltype(max_i32_i32), const int32_t>::value, "should be int32_t");
+constexpr auto max_i32_i64 = c2_max(int32_t(3), int64_t(2));
+static_assert(std::is_same<decltype(max_i32_i64), const int64_t>::value, "should be int64_t");
+constexpr auto max_i8_i32 = c2_max(int8_t(0xff), int32_t(0xffffffff));
+static_assert(std::is_same<decltype(max_i8_i32), const int32_t>::value, "should be int32_t");
+
+static_assert(c2_const_checker<max_i32_i32>::num() == 2, "should be 2");
+static_assert(c2_const_checker<max_i32_i64>::num() == 3, "should be 3");
+static_assert(c2_const_checker<max_i8_i32>::num() == 0xffffffff, "should be 0xffffffff");
+
+constexpr auto max_u32_u32 = c2_max(uint32_t(1), uint32_t(2));
+static_assert(std::is_same<decltype(max_u32_u32), const uint32_t>::value, "should be uint32_t");
+constexpr auto max_u32_u64 = c2_max(uint32_t(3), uint64_t(2));
+static_assert(std::is_same<decltype(max_u32_u64), const uint64_t>::value, "should be uint64_t");
+constexpr auto max_u32_u8 = c2_max(uint32_t(0x7fffffff), uint8_t(0xff));
+static_assert(std::is_same<decltype(max_u32_u8), const uint32_t>::value, "should be uint32_t");
+
+static_assert(c2_const_checker<max_u32_u32>::num() == 2, "should be 2");
+static_assert(c2_const_checker<max_u32_u64>::num() == 3, "should be 3");
+static_assert(c2_const_checker<max_u32_u8>::num() == 0x7fffffff, "should be 0x7fffffff");
+
+} // namespace android
diff --git a/media/libstagefright/codec2/tests/vndk/C2UtilTest.cpp b/media/libstagefright/codec2/tests/vndk/C2UtilTest.cpp
new file mode 100644
index 0000000..7a1374b
--- /dev/null
+++ b/media/libstagefright/codec2/tests/vndk/C2UtilTest.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <util/_C2MacroUtils.h>
+
+/** \file
+ * Tests for vndk/util.
+ */
+
+/* --------------------------------------- _C2MacroUtils --------------------------------------- */
+
+static_assert(0 == _C2_ARGC(), "should be 0");
+static_assert(1 == _C2_ARGC(1), "should be 1");
+static_assert(2 == _C2_ARGC(1, 2), "should be 2");
+static_assert(64 == _C2_ARGC(
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+        26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+        49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64), "should be 64");
+
+static_assert(0 == _C2_ARGC(,), "should be 0");
+static_assert(1 == _C2_ARGC(1,), "should be 1");
+static_assert(2 == _C2_ARGC(1, 2,), "should be 2");
+static_assert(64 == _C2_ARGC(
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+        26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+        49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,), "should be 64");
+
diff --git a/media/libstagefright/codec2/vndk/include/util/C2ParamUtils.h b/media/libstagefright/codec2/vndk/include/util/C2ParamUtils.h
new file mode 100644
index 0000000..edae303
--- /dev/null
+++ b/media/libstagefright/codec2/vndk/include/util/C2ParamUtils.h
@@ -0,0 +1,302 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2UTILS_PARAM_UTILS_H_
+#define C2UTILS_PARAM_UTILS_H_
+
+#include <C2Param.h>
+#include <util/_C2MacroUtils.h>
+
+#include <iostream>
+
+/** \file
+ * Utilities for parameter handling to be used by Codec2 implementations.
+ */
+
+namespace android {
+
+/// \cond INTERNAL
+
+/* ---------------------------- UTILITIES FOR ENUMERATION REFLECTION ---------------------------- */
+
+/**
+ * Utility class that allows ignoring enum value assignment (e.g. both '(_C2EnumConst)kValue = x'
+ * and '(_C2EnumConst)kValue' will eval to kValue.
+ */
+template<typename T>
+class _C2EnumConst {
+public:
+    // implicit conversion from T
+    inline _C2EnumConst(T value) : _mValue(value) {}
+    // implicit conversion to T
+    inline operator T() { return _mValue; }
+    // implicit conversion to C2Value::Primitive
+    inline operator C2Value::Primitive() { return (T)_mValue; }
+    // ignore assignment and return T here to avoid implicit conversion to T later
+    inline T &operator =(T value __unused) { return _mValue; }
+private:
+    T _mValue;
+};
+
+/// mapper to get name of enum
+/// \note this will contain any initialization, which we will remove when converting to lower-case
+#define _C2_GET_ENUM_NAME(x, y) #x
+/// mapper to get value of enum
+#define _C2_GET_ENUM_VALUE(x, type) (_C2EnumConst<type>)x
+
+/// \endcond
+
+#define DEFINE_C2_ENUM_VALUE_AUTO_HELPER(name, type, prefix, ...) \
+template<> C2FieldDescriptor::named_values_type C2FieldDescriptor::namedValuesFor(const name &r __unused) { \
+    return C2ParamUtils::sanitizeEnumValues( \
+            std::vector<C2Value::Primitive> { _C2_MAP(_C2_GET_ENUM_VALUE, type, __VA_ARGS__) }, \
+            { _C2_MAP(_C2_GET_ENUM_NAME, type, __VA_ARGS__) }, \
+            prefix); \
+}
+
+#define DEFINE_C2_ENUM_VALUE_CUSTOM_HELPER(name, type, names, ...) \
+template<> C2FieldDescriptor::named_values_type C2FieldDescriptor::namedValuesFor(const name &r __unused) { \
+    return C2ParamUtils::customEnumValues( \
+            std::vector<std::pair<C2StringLiteral, name>> names); \
+}
+
+
+class C2ParamUtils {
+private:
+    static size_t countLeadingUnderscores(C2StringLiteral a) {
+        size_t i = 0;
+        while (a[i] == '_') {
+            ++i;
+        }
+        return i;
+    }
+
+    static size_t countMatching(C2StringLiteral a, const C2String &b) {
+        for (size_t i = 0; i < b.size(); ++i) {
+            if (!a[i] || a[i] != b[i]) {
+                return i;
+            }
+        }
+        return b.size();
+    }
+
+    // ABCDef => abc-def
+    // ABCD2ef => abcd2-ef // 0
+    // ABCD2Ef => ancd2-ef // -1
+    // AbcDef => abc-def // -1
+    // Abc2Def => abc-2def
+    // Abc2def => abc-2-def
+    // _Yo => _yo
+    // _yo => _yo
+    // C2_yo => c2-yo
+    // C2__yo => c2-yo
+
+    static C2String camelCaseToDashed(C2String name) {
+        enum {
+            kNone = '.',
+            kLower = 'a',
+            kUpper = 'A',
+            kDigit = '1',
+            kDash = '-',
+            kUnderscore = '_',
+        } type = kNone;
+        size_t word_start = 0;
+        for (size_t ix = 0; ix < name.size(); ++ix) {
+            /* std::cout << name.substr(0, word_start) << "|"
+                    << name.substr(word_start, ix - word_start) << "["
+                    << name.substr(ix, 1) << "]" << name.substr(ix + 1)
+                    << ": " << (char)type << std::endl; */
+            if (isupper(name[ix])) {
+                if (type == kLower) {
+                    name.insert(ix++, 1, '-');
+                    word_start = ix;
+                }
+                name[ix] = tolower(name[ix]);
+                type = kUpper;
+            } else if (islower(name[ix])) {
+                if (type == kDigit && ix > 0) {
+                    name.insert(ix++, 1, '-');
+                    word_start = ix;
+                } else if (type == kUpper && ix > word_start + 1) {
+                    name.insert(ix++ - 1, 1, '-');
+                    word_start = ix - 1;
+                }
+                type = kLower;
+            } else if (isdigit(name[ix])) {
+                if (type == kLower) {
+                    name.insert(ix++, 1, '-');
+                    word_start = ix;
+                }
+                type = kDigit;
+            } else if (name[ix] == '_') {
+                if (type == kDash) {
+                    name.erase(ix--, 1);
+                } else if (type != kNone && type != kUnderscore) {
+                    name[ix] = '-';
+                    type = kDash;
+                    word_start = ix + 1;
+                } else {
+                    type = kUnderscore;
+                    word_start = ix + 1;
+                }
+            } else {
+                name.resize(ix);
+            }
+        }
+        // std::cout << "=> " << name << std::endl;
+        return name;
+    }
+
+    static std::vector<C2String> sanitizeEnumValueNames(
+            const std::vector<C2StringLiteral> names,
+            C2StringLiteral _prefix = NULL) {
+        std::vector<C2String> sanitizedNames;
+        C2String prefix;
+        size_t extraUnderscores = 0;
+        bool first = true;
+        if (_prefix) {
+            extraUnderscores = countLeadingUnderscores(_prefix);
+            prefix = _prefix + extraUnderscores;
+            first = false;
+            // std::cout << "prefix:" << prefix << ", underscores:" << extraUnderscores << std::endl;
+        }
+
+        // calculate prefix and minimum leading underscores
+        for (C2StringLiteral s : names) {
+            // std::cout << s << std::endl;
+            size_t underscores = countLeadingUnderscores(s);
+            if (first) {
+                extraUnderscores = underscores;
+                prefix = s + underscores;
+                first = false;
+            } else {
+                size_t matching = countMatching(
+                    s + underscores,
+                    prefix);
+                prefix.resize(matching);
+                extraUnderscores = std::min(underscores, extraUnderscores);
+            }
+            // std::cout << "prefix:" << prefix << ", underscores:" << extraUnderscores << std::endl;
+            if (prefix.size() == 0 && extraUnderscores == 0) {
+                break;
+            }
+        }
+
+        // we swallow the first underscore after upper case prefixes
+        bool upperCasePrefix = true;
+        for (size_t i = 0; i < prefix.size(); ++i) {
+            if (islower(prefix[i])) {
+                upperCasePrefix = false;
+                break;
+            }
+        }
+
+        for (C2StringLiteral s : names) {
+            size_t underscores = countLeadingUnderscores(s);
+            C2String sanitized = C2String(s, underscores - extraUnderscores);
+            sanitized.append(s + prefix.size() + underscores +
+                        (upperCasePrefix && s[prefix.size() + underscores] == '_'));
+            sanitizedNames.push_back(camelCaseToDashed(sanitized));
+        }
+
+        for (C2String s : sanitizedNames) {
+            std::cout << s << std::endl;
+        }
+
+        return sanitizedNames;
+    }
+
+    friend class C2ParamTest_ParamUtilsTest_Test;
+
+public:
+    static std::vector<C2String> getEnumValuesFromString(C2StringLiteral value) {
+        std::vector<C2String> foundNames;
+        size_t pos = 0, len = strlen(value);
+        do {
+            size_t endPos = strcspn(value + pos, " ,=") + pos;
+            if (endPos > pos) {
+                foundNames.emplace_back(value + pos, endPos - pos);
+            }
+            if (value[endPos] && value[endPos] != ',') {
+                endPos += strcspn(value + endPos, ",");
+            }
+            pos = strspn(value + endPos, " ,") + endPos;
+        } while (pos < len);
+        return foundNames;
+    }
+
+    template<typename T>
+    static C2FieldDescriptor::named_values_type sanitizeEnumValues(
+            std::vector<T> values,
+            std::vector<C2StringLiteral> names,
+            C2StringLiteral prefix = NULL) {
+        C2FieldDescriptor::named_values_type namedValues;
+        std::vector<C2String> sanitizedNames = sanitizeEnumValueNames(names, prefix);
+        for (size_t i = 0; i < values.size() && i < sanitizedNames.size(); ++i) {
+            namedValues.emplace_back(sanitizedNames[i], values[i]);
+        }
+        return namedValues;
+    }
+
+    template<typename E>
+    static C2FieldDescriptor::named_values_type customEnumValues(
+            std::vector<std::pair<C2StringLiteral, E>> items) {
+        C2FieldDescriptor::named_values_type namedValues;
+        for (auto &item : items) {
+            namedValues.emplace_back(item.first, item.second);
+        }
+        return namedValues;
+    }
+};
+
+/* ---------------------------- UTILITIES FOR PARAMETER REFLECTION ---------------------------- */
+
+/* ======================== UTILITY TEMPLATES FOR PARAMETER REFLECTION ======================== */
+
+#if 1
+template<typename... Params>
+class C2_HIDE _C2Tuple { };
+
+C2_HIDE
+void addC2Params(std::list<const C2FieldDescriptor> &, _C2Tuple<> *) {
+}
+
+template<typename T, typename... Params>
+C2_HIDE
+void addC2Params(std::list<const C2FieldDescriptor> &fields, _C2Tuple<T, Params...> *)
+{
+    //C2Param::index_t index = T::baseIndex;
+    //(void)index;
+    fields.insert(fields.end(), T::fieldList);
+    addC2Params(fields, (_C2Tuple<Params...> *)nullptr);
+}
+
+template<typename... Params>
+C2_HIDE
+std::list<const C2FieldDescriptor> describeC2Params() {
+    std::list<const C2FieldDescriptor> fields;
+    addC2Params(fields, (_C2Tuple<Params...> *)nullptr);
+    return fields;
+}
+
+#endif
+
+/* ---------------------------- UTILITIES FOR ENUMERATION REFLECTION ---------------------------- */
+
+}  // namespace android
+
+#endif  // C2UTILS_PARAM_UTILS_H_
+
diff --git a/media/libstagefright/codec2/vndk/include/util/_C2MacroUtils.h b/media/libstagefright/codec2/vndk/include/util/_C2MacroUtils.h
new file mode 100644
index 0000000..04e9ba5
--- /dev/null
+++ b/media/libstagefright/codec2/vndk/include/util/_C2MacroUtils.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef C2UTILS_MACRO_UTILS_H_
+#define C2UTILS_MACRO_UTILS_H_
+
+/** \file
+ * Macro utilities for the utils library used by Codec2 implementations.
+ */
+
+/// \if 0
+
+/* --------------------------------- VARIABLE ARGUMENT COUNTING --------------------------------- */
+
+// remove empty arguments - _C2_ARG() expands to '', while _C2_ARG(x) expands to ', x'
+// _C2_ARGn(...) does the same for n arguments
+#define _C2_ARG(...) , ##__VA_ARGS__
+#define _C2_ARG2(_1, _2) _C2_ARG(_1) _C2_ARG(_2)
+#define _C2_ARG4(_1, _2, _3, _4) _C2_ARG2(_1, _2) _C2_ARG2(_3, _4)
+#define _C2_ARG8(_1, _2, _3, _4, _5, _6, _7, _8) _C2_ARG4(_1, _2, _3, _4) _C2_ARG4(_5, _6, _7, _8)
+#define _C2_ARG16(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16) \
+        _C2_ARG8(_1, _2, _3, _4, _5, _6, _7, _8) _C2_ARG8(_9, _10, _11, _12, _13, _14, _15, _16)
+
+// return the 65th argument
+#define _C2_ARGC_3(_, _0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, \
+        _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, \
+        _33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48, \
+        _49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, _64, ...) _64
+
+/// \endif
+
+/**
+ * Returns the number of arguments.
+ */
+// We do this by prepending 1 and appending 65 designed values such that the 65th element
+// will be the number of arguments.
+#define _C2_ARGC(...) _C2_ARGC_1(0, ##__VA_ARGS__, \
+        64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, \
+        42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, \
+        20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
+
+/// \if 0
+
+// step 1. remove empty arguments - this is needed to allow trailing comma in enum definitions
+// (NOTE: we don't know which argument will have this trailing comma so we have to try all)
+#define _C2_ARGC_1(_, _0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, \
+        _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, \
+        _33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48, \
+        _49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, _64, ...) \
+    _C2_ARGC_2(_ _C2_ARG(_0) \
+    _C2_ARG16(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16) \
+    _C2_ARG16(_17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32) \
+    _C2_ARG16(_33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48) \
+    _C2_ARG16(_49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, _64), \
+    ##__VA_ARGS__)
+
+// step 2. this is needed as removed arguments cannot be passed directly as empty into a macro
+#define _C2_ARGC_2(...) _C2_ARGC_3(__VA_ARGS__)
+
+/// \endif
+
+/* -------------------------------- VARIABLE ARGUMENT CONVERSION -------------------------------- */
+
+/// \if 0
+
+// macros that convert _1, _2, _3, ... to fn(_1, arg), fn(_2, arg), fn(_3, arg), ...
+#define _C2_MAP_64(fn, arg, head, ...) fn(head, arg), _C2_MAP_63(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_63(fn, arg, head, ...) fn(head, arg), _C2_MAP_62(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_62(fn, arg, head, ...) fn(head, arg), _C2_MAP_61(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_61(fn, arg, head, ...) fn(head, arg), _C2_MAP_60(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_60(fn, arg, head, ...) fn(head, arg), _C2_MAP_59(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_59(fn, arg, head, ...) fn(head, arg), _C2_MAP_58(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_58(fn, arg, head, ...) fn(head, arg), _C2_MAP_57(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_57(fn, arg, head, ...) fn(head, arg), _C2_MAP_56(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_56(fn, arg, head, ...) fn(head, arg), _C2_MAP_55(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_55(fn, arg, head, ...) fn(head, arg), _C2_MAP_54(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_54(fn, arg, head, ...) fn(head, arg), _C2_MAP_53(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_53(fn, arg, head, ...) fn(head, arg), _C2_MAP_52(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_52(fn, arg, head, ...) fn(head, arg), _C2_MAP_51(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_51(fn, arg, head, ...) fn(head, arg), _C2_MAP_50(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_50(fn, arg, head, ...) fn(head, arg), _C2_MAP_49(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_49(fn, arg, head, ...) fn(head, arg), _C2_MAP_48(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_48(fn, arg, head, ...) fn(head, arg), _C2_MAP_47(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_47(fn, arg, head, ...) fn(head, arg), _C2_MAP_46(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_46(fn, arg, head, ...) fn(head, arg), _C2_MAP_45(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_45(fn, arg, head, ...) fn(head, arg), _C2_MAP_44(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_44(fn, arg, head, ...) fn(head, arg), _C2_MAP_43(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_43(fn, arg, head, ...) fn(head, arg), _C2_MAP_42(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_42(fn, arg, head, ...) fn(head, arg), _C2_MAP_41(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_41(fn, arg, head, ...) fn(head, arg), _C2_MAP_40(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_40(fn, arg, head, ...) fn(head, arg), _C2_MAP_39(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_39(fn, arg, head, ...) fn(head, arg), _C2_MAP_38(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_38(fn, arg, head, ...) fn(head, arg), _C2_MAP_37(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_37(fn, arg, head, ...) fn(head, arg), _C2_MAP_36(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_36(fn, arg, head, ...) fn(head, arg), _C2_MAP_35(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_35(fn, arg, head, ...) fn(head, arg), _C2_MAP_34(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_34(fn, arg, head, ...) fn(head, arg), _C2_MAP_33(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_33(fn, arg, head, ...) fn(head, arg), _C2_MAP_32(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_32(fn, arg, head, ...) fn(head, arg), _C2_MAP_31(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_31(fn, arg, head, ...) fn(head, arg), _C2_MAP_30(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_30(fn, arg, head, ...) fn(head, arg), _C2_MAP_29(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_29(fn, arg, head, ...) fn(head, arg), _C2_MAP_28(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_28(fn, arg, head, ...) fn(head, arg), _C2_MAP_27(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_27(fn, arg, head, ...) fn(head, arg), _C2_MAP_26(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_26(fn, arg, head, ...) fn(head, arg), _C2_MAP_25(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_25(fn, arg, head, ...) fn(head, arg), _C2_MAP_24(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_24(fn, arg, head, ...) fn(head, arg), _C2_MAP_23(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_23(fn, arg, head, ...) fn(head, arg), _C2_MAP_22(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_22(fn, arg, head, ...) fn(head, arg), _C2_MAP_21(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_21(fn, arg, head, ...) fn(head, arg), _C2_MAP_20(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_20(fn, arg, head, ...) fn(head, arg), _C2_MAP_19(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_19(fn, arg, head, ...) fn(head, arg), _C2_MAP_18(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_18(fn, arg, head, ...) fn(head, arg), _C2_MAP_17(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_17(fn, arg, head, ...) fn(head, arg), _C2_MAP_16(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_16(fn, arg, head, ...) fn(head, arg), _C2_MAP_15(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_15(fn, arg, head, ...) fn(head, arg), _C2_MAP_14(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_14(fn, arg, head, ...) fn(head, arg), _C2_MAP_13(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_13(fn, arg, head, ...) fn(head, arg), _C2_MAP_12(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_12(fn, arg, head, ...) fn(head, arg), _C2_MAP_11(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_11(fn, arg, head, ...) fn(head, arg), _C2_MAP_10(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_10(fn, arg, head, ...) fn(head, arg), _C2_MAP_9(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_9(fn, arg, head, ...) fn(head, arg), _C2_MAP_8(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_8(fn, arg, head, ...) fn(head, arg), _C2_MAP_7(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_7(fn, arg, head, ...) fn(head, arg), _C2_MAP_6(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_6(fn, arg, head, ...) fn(head, arg), _C2_MAP_5(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_5(fn, arg, head, ...) fn(head, arg), _C2_MAP_4(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_4(fn, arg, head, ...) fn(head, arg), _C2_MAP_3(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_3(fn, arg, head, ...) fn(head, arg), _C2_MAP_2(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_2(fn, arg, head, ...) fn(head, arg), _C2_MAP_1(fn, arg, ##__VA_ARGS__)
+#define _C2_MAP_1(fn, arg, head, ...) fn(head, arg)
+
+/// \endif
+
+/**
+ * Maps each argument using another macro x -> fn(x, arg)
+ */
+// use wrapper to call the proper mapper based on the number of arguments
+#define _C2_MAP(fn, arg, ...) _C2_MAP__(_C2_ARGC(__VA_ARGS__), fn, arg, ##__VA_ARGS__)
+
+/// \if 0
+
+// evaluate _n so it becomes a number
+#define _C2_MAP__(_n, fn, arg, ...) _C2_MAP_(_n, fn, arg, __VA_ARGS__)
+// call the proper mapper
+#define _C2_MAP_(_n, fn, arg, ...) _C2_MAP_##_n (fn, arg, __VA_ARGS__)
+
+/// \endif
+
+#endif  // C2UTILS_MACRO_UTILS_H_
diff --git a/media/libstagefright/codecs/avcdec/SoftAVCDec.cpp b/media/libstagefright/codecs/avcdec/SoftAVCDec.cpp
index cecc52b..e2bba25 100644
--- a/media/libstagefright/codecs/avcdec/SoftAVCDec.cpp
+++ b/media/libstagefright/codecs/avcdec/SoftAVCDec.cpp
@@ -49,58 +49,10 @@
         (IVD_CONTROL_API_COMMAND_TYPE_T)IH264D_CMD_CTL_SET_NUM_CORES
 
 static const CodecProfileLevel kProfileLevels[] = {
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel1  },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel1b },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel11 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel12 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel13 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel2  },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel21 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel22 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel3  },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel31 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel32 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel4  },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel41 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel42 },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel5  },
-    { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel51 },
     { OMX_VIDEO_AVCProfileBaseline, OMX_VIDEO_AVCLevel52 },
 
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel1  },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel1b },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel11 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel12 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel13 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel2  },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel21 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel22 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel3  },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel31 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel32 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel4  },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel41 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel42 },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel5  },
-    { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel51 },
     { OMX_VIDEO_AVCProfileMain,     OMX_VIDEO_AVCLevel52 },
 
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel1  },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel1b },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel11 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel12 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel13 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel2  },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel21 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel22 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel3  },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel31 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel32 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel4  },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel41 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel42 },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel5  },
-    { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel51 },
     { OMX_VIDEO_AVCProfileHigh,     OMX_VIDEO_AVCLevel52 },
 };
 
@@ -120,7 +72,8 @@
       mIvColorFormat(IV_YUV_420P),
       mChangingResolution(false),
       mSignalledError(false),
-      mStride(mWidth){
+      mStride(mWidth),
+      mInputOffset(0){
     initPorts(
             1 /* numMinInputBuffers */, kNumBuffers, INPUT_BUF_SIZE,
             1 /* numMinOutputBuffers */, kNumBuffers, CODEC_MIME_TYPE);
@@ -215,6 +168,7 @@
 status_t SoftAVC::resetPlugin() {
     mIsInFlush = false;
     mReceivedEOS = false;
+    mInputOffset = 0;
     memset(mTimeStamps, 0, sizeof(mTimeStamps));
     memset(mTimeStampsValid, 0, sizeof(mTimeStampsValid));
 
@@ -443,8 +397,8 @@
     if (inHeader) {
         ps_dec_ip->u4_ts = timeStampIx;
         ps_dec_ip->pv_stream_buffer =
-            inHeader->pBuffer + inHeader->nOffset;
-        ps_dec_ip->u4_num_Bytes = inHeader->nFilledLen;
+            inHeader->pBuffer + inHeader->nOffset + mInputOffset;
+        ps_dec_ip->u4_num_Bytes = inHeader->nFilledLen - mInputOffset;
     } else {
         ps_dec_ip->u4_ts = 0;
         ps_dec_ip->pv_stream_buffer = NULL;
@@ -515,6 +469,8 @@
 
 void SoftAVC::onQueueFilled(OMX_U32 portIndex) {
     UNUSED(portIndex);
+    OMX_BUFFERHEADERTYPE *inHeader = NULL;
+    BufferInfo *inInfo = NULL;
 
     if (mSignalledError) {
         return;
@@ -541,17 +497,11 @@
     List<BufferInfo *> &outQueue = getPortQueue(kOutputPortIndex);
 
     while (!outQueue.empty()) {
-        BufferInfo *inInfo;
-        OMX_BUFFERHEADERTYPE *inHeader;
-
         BufferInfo *outInfo;
         OMX_BUFFERHEADERTYPE *outHeader;
-        size_t timeStampIx;
+        size_t timeStampIx = 0;
 
-        inInfo = NULL;
-        inHeader = NULL;
-
-        if (!mIsInFlush) {
+        if (!mIsInFlush && (NULL == inHeader)) {
             if (!inQueue.empty()) {
                 inInfo = *inQueue.begin();
                 inHeader = inInfo->mHeader;
@@ -618,7 +568,7 @@
                 return;
             }
             // If input dump is enabled, then write to file
-            DUMP_TO_FILE(mInFile, s_dec_ip.pv_stream_buffer, s_dec_ip.u4_num_Bytes);
+            DUMP_TO_FILE(mInFile, s_dec_ip.pv_stream_buffer, s_dec_ip.u4_num_Bytes, mInputOffset);
 
             GETTIME(&mTimeStart, NULL);
             /* Compute time elapsed between end of previous decode()
@@ -734,24 +684,26 @@
                     resetPlugin();
                 }
             }
+            mInputOffset += s_dec_op.u4_num_bytes_consumed;
         }
-
-        /* If input EOS is seen and decoder is not in flush mode,
-         * set the decoder in flush mode.
-         * There can be a case where EOS is sent along with last picture data
-         * In that case, only after decoding that input data, decoder has to be
-         * put in flush. This case is handled here  */
-
-        if (mReceivedEOS && !mIsInFlush) {
-            setFlushMode();
-        }
-
-        if (inHeader != NULL) {
+        // If more than 4 bytes are remaining in input, then do not release it
+        if (inHeader != NULL && ((inHeader->nFilledLen - mInputOffset) <= 4)) {
             inInfo->mOwnedByUs = false;
             inQueue.erase(inQueue.begin());
             inInfo = NULL;
             notifyEmptyBufferDone(inHeader);
             inHeader = NULL;
+            mInputOffset = 0;
+
+            /* If input EOS is seen and decoder is not in flush mode,
+             * set the decoder in flush mode.
+             * There can be a case where EOS is sent along with last picture data
+             * In that case, only after decoding that input data, decoder has to be
+             * put in flush. This case is handled here  */
+
+            if (mReceivedEOS && !mIsInFlush) {
+                setFlushMode();
+            }
         }
     }
 }
diff --git a/media/libstagefright/codecs/avcdec/SoftAVCDec.h b/media/libstagefright/codecs/avcdec/SoftAVCDec.h
index b333190..2a71188 100644
--- a/media/libstagefright/codecs/avcdec/SoftAVCDec.h
+++ b/media/libstagefright/codecs/avcdec/SoftAVCDec.h
@@ -99,6 +99,7 @@
     bool mFlushNeeded;
     bool mSignalledError;
     size_t mStride;
+    size_t mInputOffset;
 
     status_t initDecoder();
     status_t deInitDecoder();
@@ -143,10 +144,10 @@
         ALOGD("Could not open file %s", m_filename);    \
     }                                                   \
 }
-#define DUMP_TO_FILE(m_filename, m_buf, m_size)         \
+#define DUMP_TO_FILE(m_filename, m_buf, m_size, m_offset)\
 {                                                       \
     FILE *fp = fopen(m_filename, "ab");                 \
-    if (fp != NULL && m_buf != NULL) {                  \
+    if (fp != NULL && m_buf != NULL && m_offset == 0) { \
         int i;                                          \
         i = fwrite(m_buf, 1, m_size, fp);               \
         ALOGD("fwrite ret %d to write %d", i, m_size);  \
@@ -154,10 +155,12 @@
             ALOGD("Error in fwrite, returned %d", i);   \
             perror("Error in write to file");           \
         }                                               \
-        fclose(fp);                                     \
-    } else {                                            \
+    } else if (fp == NULL) {                            \
         ALOGD("Could not write to file %s", m_filename);\
     }                                                   \
+    if (fp) {                                           \
+        fclose(fp);                                     \
+    }                                                   \
 }
 #else /* FILE_DUMP_ENABLE */
 #define INPUT_DUMP_PATH
@@ -166,7 +169,7 @@
 #define OUTPUT_DUMP_EXT
 #define GENERATE_FILE_NAMES()
 #define CREATE_DUMP_FILE(m_filename)
-#define DUMP_TO_FILE(m_filename, m_buf, m_size)
+#define DUMP_TO_FILE(m_filename, m_buf, m_size, m_offset)
 #endif /* FILE_DUMP_ENABLE */
 
 } // namespace android
diff --git a/media/libstagefright/codecs/hevcdec/SoftHEVC.cpp b/media/libstagefright/codecs/hevcdec/SoftHEVC.cpp
index 5c70387..a3fd336 100644
--- a/media/libstagefright/codecs/hevcdec/SoftHEVC.cpp
+++ b/media/libstagefright/codecs/hevcdec/SoftHEVC.cpp
@@ -48,14 +48,6 @@
         (IVD_CONTROL_API_COMMAND_TYPE_T)IHEVCD_CXA_CMD_CTL_SET_NUM_CORES
 
 static const CodecProfileLevel kProfileLevels[] = {
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel1  },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel2  },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel21 },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel3  },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel31 },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel4  },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel41 },
-    { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel5  },
     { OMX_VIDEO_HEVCProfileMain, OMX_VIDEO_HEVCMainTierLevel51 },
 };
 
diff --git a/media/libstagefright/codecs/mpeg2dec/SoftMPEG2.cpp b/media/libstagefright/codecs/mpeg2dec/SoftMPEG2.cpp
index 5ed037a..ce28faf 100644
--- a/media/libstagefright/codecs/mpeg2dec/SoftMPEG2.cpp
+++ b/media/libstagefright/codecs/mpeg2dec/SoftMPEG2.cpp
@@ -47,14 +47,8 @@
         (IVD_CONTROL_API_COMMAND_TYPE_T)IMPEG2D_CMD_CTL_SET_NUM_CORES
 
 static const CodecProfileLevel kProfileLevels[] = {
-    { OMX_VIDEO_MPEG2ProfileSimple, OMX_VIDEO_MPEG2LevelLL  },
-    { OMX_VIDEO_MPEG2ProfileSimple, OMX_VIDEO_MPEG2LevelML  },
-    { OMX_VIDEO_MPEG2ProfileSimple, OMX_VIDEO_MPEG2LevelH14 },
     { OMX_VIDEO_MPEG2ProfileSimple, OMX_VIDEO_MPEG2LevelHL  },
 
-    { OMX_VIDEO_MPEG2ProfileMain  , OMX_VIDEO_MPEG2LevelLL  },
-    { OMX_VIDEO_MPEG2ProfileMain  , OMX_VIDEO_MPEG2LevelML  },
-    { OMX_VIDEO_MPEG2ProfileMain  , OMX_VIDEO_MPEG2LevelH14 },
     { OMX_VIDEO_MPEG2ProfileMain  , OMX_VIDEO_MPEG2LevelHL  },
 };
 
diff --git a/media/mtp/MtpDevice.cpp b/media/mtp/MtpDevice.cpp
index e3d2ec6..82a2627 100644
--- a/media/mtp/MtpDevice.cpp
+++ b/media/mtp/MtpDevice.cpp
@@ -39,6 +39,12 @@
 
 namespace android {
 
+namespace {
+
+static constexpr int USB_CONTROL_TRANSFER_TIMEOUT_MS = 200;
+
+}  // namespace
+
 #if 0
 static bool isMtpDevice(uint16_t vendor, uint16_t product) {
     // Sandisk Sansa Fuze
@@ -84,15 +90,18 @@
                 interface->bInterfaceSubClass == 1 && // Still Image Capture
                 interface->bInterfaceProtocol == 1)     // Picture Transfer Protocol (PIMA 15470)
             {
-                char* manufacturerName = usb_device_get_manufacturer_name(device);
-                char* productName = usb_device_get_product_name(device);
+                char* manufacturerName = usb_device_get_manufacturer_name(device,
+                        USB_CONTROL_TRANSFER_TIMEOUT_MS);
+                char* productName = usb_device_get_product_name(device,
+                        USB_CONTROL_TRANSFER_TIMEOUT_MS);
                 ALOGD("Found camera: \"%s\" \"%s\"\n", manufacturerName, productName);
                 free(manufacturerName);
                 free(productName);
             } else if (interface->bInterfaceClass == 0xFF &&
                     interface->bInterfaceSubClass == 0xFF &&
                     interface->bInterfaceProtocol == 0) {
-                char* interfaceName = usb_device_get_string(device, interface->iInterface);
+                char* interfaceName = usb_device_get_string(device, interface->iInterface,
+                        USB_CONTROL_TRANSFER_TIMEOUT_MS);
                 if (!interfaceName) {
                     continue;
                 } else if (strcmp(interfaceName, "MTP")) {
@@ -102,8 +111,10 @@
                 free(interfaceName);
 
                 // Looks like an android style MTP device
-                char* manufacturerName = usb_device_get_manufacturer_name(device);
-                char* productName = usb_device_get_product_name(device);
+                char* manufacturerName = usb_device_get_manufacturer_name(device,
+                        USB_CONTROL_TRANSFER_TIMEOUT_MS);
+                char* productName = usb_device_get_product_name(device,
+                        USB_CONTROL_TRANSFER_TIMEOUT_MS);
                 ALOGD("Found MTP device: \"%s\" \"%s\"\n", manufacturerName, productName);
                 free(manufacturerName);
                 free(productName);
diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index 4b32691..c60b49a 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -234,9 +234,9 @@
 
     virtual status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle,
+                                      audio_patch_handle_t *handle,
                                       uid_t uid) = 0;
-    virtual status_t stopAudioSource(audio_io_handle_t handle) = 0;
+    virtual status_t stopAudioSource(audio_patch_handle_t handle) = 0;
 
     virtual status_t setMasterMono(bool mono) = 0;
     virtual status_t getMasterMono(bool *mono) = 0;
diff --git a/services/audiopolicy/common/managerdefinitions/include/AudioSourceDescriptor.h b/services/audiopolicy/common/managerdefinitions/include/AudioSourceDescriptor.h
index 4ab7cf0..7e1e24d 100644
--- a/services/audiopolicy/common/managerdefinitions/include/AudioSourceDescriptor.h
+++ b/services/audiopolicy/common/managerdefinitions/include/AudioSourceDescriptor.h
@@ -50,7 +50,7 @@
 };
 
 class AudioSourceCollection :
-        public DefaultKeyedVector< audio_io_handle_t, sp<AudioSourceDescriptor> >
+        public DefaultKeyedVector< audio_patch_handle_t, sp<AudioSourceDescriptor> >
 {
 public:
     status_t dump(int fd) const;
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 7c955e5..2f01b02 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -3026,7 +3026,7 @@
 
 status_t AudioPolicyManager::startAudioSource(const struct audio_port_config *source,
                                   const audio_attributes_t *attributes,
-                                  audio_io_handle_t *handle,
+                                  audio_patch_handle_t *handle,
                                   uid_t uid)
 {
     ALOGV("%s source %p attributes %p handle %p", __FUNCTION__, source, attributes, handle);
@@ -3034,7 +3034,7 @@
         return BAD_VALUE;
     }
 
-    *handle = AUDIO_IO_HANDLE_NONE;
+    *handle = AUDIO_PATCH_HANDLE_NONE;
 
     if (source->role != AUDIO_PORT_ROLE_SOURCE ||
             source->type != AUDIO_PORT_TYPE_DEVICE) {
@@ -3141,7 +3141,7 @@
     return NO_ERROR;
 }
 
-status_t AudioPolicyManager::stopAudioSource(audio_io_handle_t handle __unused)
+status_t AudioPolicyManager::stopAudioSource(audio_patch_handle_t handle __unused)
 {
     sp<AudioSourceDescriptor> sourceDesc = mAudioSources.valueFor(handle);
     ALOGV("%s handle %d", __FUNCTION__, handle);
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.h b/services/audiopolicy/managerdefault/AudioPolicyManager.h
index 46f0625..52fa082 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.h
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.h
@@ -228,9 +228,9 @@
 
         virtual status_t startAudioSource(const struct audio_port_config *source,
                                           const audio_attributes_t *attributes,
-                                          audio_io_handle_t *handle,
+                                          audio_patch_handle_t *handle,
                                           uid_t uid);
-        virtual status_t stopAudioSource(audio_io_handle_t handle);
+        virtual status_t stopAudioSource(audio_patch_handle_t handle);
 
         virtual status_t setMasterMono(bool mono);
         virtual status_t getMasterMono(bool *mono);
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index f6da920..53c54bb 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -712,7 +712,7 @@
 
 status_t AudioPolicyService::startAudioSource(const struct audio_port_config *source,
                                   const audio_attributes_t *attributes,
-                                  audio_io_handle_t *handle)
+                                  audio_patch_handle_t *handle)
 {
     Mutex::Autolock _l(mLock);
     if (mAudioPolicyManager == NULL) {
@@ -723,7 +723,7 @@
                                                  IPCThreadState::self()->getCallingUid());
 }
 
-status_t AudioPolicyService::stopAudioSource(audio_io_handle_t handle)
+status_t AudioPolicyService::stopAudioSource(audio_patch_handle_t handle)
 {
     Mutex::Autolock _l(mLock);
     if (mAudioPolicyManager == NULL) {
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImplLegacy.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImplLegacy.cpp
index 517fba1..a5b96fe 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImplLegacy.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImplLegacy.cpp
@@ -610,12 +610,12 @@
 
 status_t AudioPolicyService::startAudioSource(const struct audio_port_config *source,
                                   const audio_attributes_t *attributes,
-                                  audio_io_handle_t *handle)
+                                  audio_patch_handle_t *handle)
 {
     return INVALID_OPERATION;
 }
 
-status_t AudioPolicyService::stopAudioSource(audio_io_handle_t handle)
+status_t AudioPolicyService::stopAudioSource(audio_patch_handle_t handle)
 {
     return INVALID_OPERATION;
 }
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index f34473c..a310735 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -200,8 +200,8 @@
 
     virtual status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle);
-    virtual status_t stopAudioSource(audio_io_handle_t handle);
+                                      audio_patch_handle_t *handle);
+    virtual status_t stopAudioSource(audio_patch_handle_t handle);
 
     virtual status_t setMasterMono(bool mono);
     virtual status_t getMasterMono(bool *mono);