diff --git a/include/hardware/audio_effect.h b/include/hardware/audio_effect.h
index b49d02d..ee48e4c 100644
--- a/include/hardware/audio_effect.h
+++ b/include/hardware/audio_effect.h
@@ -815,7 +815,7 @@
     uint32_t   samplingRate;    // sampling rate
     uint32_t   channels;        // channel mask (see audio_channel_mask_t in audio.h)
     buffer_provider_t bufferProvider;   // buffer provider
-    uint8_t    format;          // Audio format  (see see audio_format_t in audio.h)
+    uint8_t    format;          // Audio format (see audio_format_t in audio.h)
     uint8_t    accessMode;      // read/write or accumulate in buffer (effect_buffer_access_e)
     uint16_t   mask;            // indicates which of the above fields is valid
 } buffer_config_t;
diff --git a/include/hardware/gps.h b/include/hardware/gps.h
index 458b5b4..d905725 100644
--- a/include/hardware/gps.h
+++ b/include/hardware/gps.h
@@ -221,6 +221,11 @@
 #define AGPS_INTERFACE      "agps"
 
 /**
+ * Name of the Supl Certificate interface.
+ */
+#define SUPL_CERTIFICATE_INTERFACE  "supl-certificate"
+
+/**
  * Name for NI interface
  */
 #define GPS_NI_INTERFACE "gps-ni"
@@ -507,7 +512,7 @@
      */
     void  (*init)( AGpsCallbacks* callbacks );
     /**
-     * Notifies that a data connection is available and sets 
+     * Notifies that a data connection is available and sets
      * the name of the APN to be used for SUPL.
      */
     int  (*data_conn_open)( const char* apn );
@@ -516,7 +521,7 @@
      */
     int  (*data_conn_closed)();
     /**
-     * Notifies that a data connection is not available for AGPS. 
+     * Notifies that a data connection is not available for AGPS.
      */
     int  (*data_conn_failed)();
     /**
@@ -525,6 +530,72 @@
     int  (*set_server)( AGpsType type, const char* hostname, int port );
 } AGpsInterface;
 
+/** Error codes associated with certificate operations */
+#define AGPS_CERTIFICATE_OPERATION_SUCCESS               0
+#define AGPS_CERTIFICATE_ERROR_GENERIC                -100
+#define AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES  -101
+
+/** A data structure that represents an X.509 certificate using DER encoding */
+typedef struct {
+    size_t  length;
+    u_char* data;
+} DerEncodedCertificate;
+
+/**
+ * A type definition for SHA1 Fingerprints used to identify X.509 Certificates
+ * The Fingerprint is a digest of the DER Certificate that uniquely identifies it.
+ */
+typedef struct {
+    u_char data[20];
+} Sha1CertificateFingerprint;
+
+/** AGPS Inteface to handle SUPL certificate operations */
+typedef struct {
+    /** set to sizeof(SuplCertificateInterface) */
+    size_t size;
+
+    /**
+     * Installs a set of Certificates used for SUPL connections to the AGPS server.
+     * If needed the HAL should find out internally any certificates that need to be removed to
+     * accommodate the certificates to install.
+     * The certificates installed represent a full set of valid certificates needed to connect to
+     * AGPS SUPL servers.
+     * The list of certificates is required, and all must be available at the same time, when trying
+     * to establish a connection with the AGPS Server.
+     *
+     * Parameters:
+     *      certificates - A pointer to an array of DER encoded certificates that are need to be
+     *                     installed in the HAL.
+     *      length - The number of certificates to install.
+     * Returns:
+     *      AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully
+     *      AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES if the HAL cannot store the number of
+     *          certificates attempted to be installed, the state of the certificates stored should
+     *          remain the same as before on this error case.
+     *
+     * IMPORTANT:
+     *      If needed the HAL should find out internally the set of certificates that need to be
+     *      removed to accommodate the certificates to install.
+     */
+    int  (*install_certificates) ( const DerEncodedCertificate* certificates, size_t length );
+
+    /**
+     * Notifies the HAL that a list of certificates used for SUPL connections are revoked. It is
+     * expected that the given set of certificates is removed from the internal store of the HAL.
+     *
+     * Parameters:
+     *      fingerprints - A pointer to an array of SHA1 Fingerprints to identify the set of
+     *                     certificates to revoke.
+     *      length - The number of fingerprints provided.
+     * Returns:
+     *      AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully.
+     *
+     * IMPORTANT:
+     *      If any of the certificates provided (through its fingerprint) is not known by the HAL,
+     *      it should be ignored and continue revoking/deleting the rest of them.
+     */
+    int  (*revoke_certificates) ( const Sha1CertificateFingerprint* fingerprints, size_t length );
+} SuplCertificateInteface;
 
 /** Represents an NI request */
 typedef struct {
diff --git a/include/hardware/nfc_tag.h b/include/hardware/nfc_tag.h
new file mode 100644
index 0000000..72028f4
--- /dev/null
+++ b/include/hardware/nfc_tag.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2013 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 ANDROID_NFC_TAG_HAL_INTERFACE_H
+#define ANDROID_NFC_TAG_HAL_INTERFACE_H
+
+#include <stdint.h>
+
+#include <hardware/hardware.h>
+
+__BEGIN_DECLS
+
+/*
+ * HAL for programmable NFC tags.
+ *
+ */
+
+#define NFC_TAG_HARDWARE_MODULE_ID "nfc_tag"
+#define NFC_TAG_ID "tag"
+
+typedef struct nfc_tag_module_t {
+    struct hw_module_t common;
+} nfc_tag_module_t;
+
+typedef struct nfc_tag_device {
+    struct hw_device_t common;
+
+    /**
+     * Initialize the NFC tag.
+     *
+     * The driver must:
+     *   * Set the static lock bytes to read only
+     *   * Configure the Capability Container to disable write acess
+     *         eg: 0xE1 0x10 <size> 0x0F
+     *
+     * This function is called once before any calls to setContent().
+     *
+     * Return 0 on success or -errno on error.
+     */
+    int (*init)(const struct nfc_tag_device *dev);
+
+    /**
+     * Set the NFC tag content.
+     *
+     * The driver must write <data> in the data area of the tag starting at
+     * byte 0 of block 4 and zero the rest of the data area.
+     *
+     * Returns 0 on success or -errno on error.
+     */
+    int (*setContent)(const struct nfc_tag_device *dev, const uint8_t *data, size_t len);
+
+    /**
+     * Returns the memory size of the data area.
+     */
+    int (*getMemorySize)(const struct nfc_tag_device *dev);
+} nfc_tag_device_t;
+
+static inline int nfc_tag_open(const struct hw_module_t* module,
+                               nfc_tag_device_t** dev) {
+    return module->methods->open(module, NFC_TAG_ID,
+                                 (struct hw_device_t**)dev);
+}
+
+static inline int nfc_tag_close(nfc_tag_device_t* dev) {
+    return dev->common.close(&dev->common);
+}
+
+__END_DECLS
+
+#endif // ANDROID_NFC_TAG_HAL_INTERFACE_H
diff --git a/modules/camera/Android.mk b/modules/camera/Android.mk
index e02a143..02d8a33 100644
--- a/modules/camera/Android.mk
+++ b/modules/camera/Android.mk
@@ -26,14 +26,17 @@
 LOCAL_SRC_FILES := \
 	CameraHAL.cpp \
 	Camera.cpp \
+	ExampleCamera.cpp \
 	Metadata.cpp \
 	Stream.cpp \
+	VendorTags.cpp \
 
 LOCAL_SHARED_LIBRARIES := \
 	libcamera_metadata \
 	libcutils \
 	liblog \
 	libsync \
+	libutils \
 
 LOCAL_CFLAGS += -Wall -Wextra -fvisibility=hidden
 
diff --git a/modules/camera/Camera.cpp b/modules/camera/Camera.cpp
index 973380e..a3164e5 100644
--- a/modules/camera/Camera.cpp
+++ b/modules/camera/Camera.cpp
@@ -16,6 +16,7 @@
 
 #include <cstdlib>
 #include <pthread.h>
+#include <stdio.h>
 #include <hardware/camera3.h>
 #include <sync/sync.h>
 #include <system/camera_metadata.h>
@@ -29,15 +30,12 @@
 #include <cutils/log.h>
 
 #define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
-#include <cutils/trace.h>
-#include "ScopedTrace.h"
+#include <utils/Trace.h>
 
 #include "Camera.h"
 
 #define CAMERA_SYNC_TIMEOUT 5000 // in msecs
 
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
-
 namespace default_camera_hal {
 
 extern "C" {
@@ -62,6 +60,7 @@
     pthread_mutex_init(&mMutex, NULL);
     pthread_mutex_init(&mStaticInfoMutex, NULL);
 
+    memset(&mTemplates, 0, sizeof(mTemplates));
     memset(&mDevice, 0, sizeof(mDevice));
     mDevice.common.tag    = HARDWARE_DEVICE_TAG;
     mDevice.common.version = CAMERA_DEVICE_API_VERSION_3_0;
@@ -74,12 +73,15 @@
 {
     pthread_mutex_destroy(&mMutex);
     pthread_mutex_destroy(&mStaticInfoMutex);
+    if (mStaticInfo != NULL) {
+        free_camera_metadata(mStaticInfo);
+    }
 }
 
 int Camera::open(const hw_module_t *module, hw_device_t **device)
 {
     ALOGI("%s:%d: Opening camera device", __func__, mId);
-    CAMTRACE_CALL();
+    ATRACE_CALL();
     pthread_mutex_lock(&mMutex);
     if (mBusy) {
         pthread_mutex_unlock(&mMutex);
@@ -116,7 +118,7 @@
 int Camera::close()
 {
     ALOGI("%s:%d: Closing camera device", __func__, mId);
-    CAMTRACE_CALL();
+    ATRACE_CALL();
     pthread_mutex_lock(&mMutex);
     if (!mBusy) {
         pthread_mutex_unlock(&mMutex);
@@ -133,174 +135,25 @@
 
 int Camera::initialize(const camera3_callback_ops_t *callback_ops)
 {
+    int res;
+
     ALOGV("%s:%d: callback_ops=%p", __func__, mId, callback_ops);
     mCallbackOps = callback_ops;
-    // Create standard settings templates
-    // 0 is invalid as template
-    mTemplates[0] = NULL;
-    // CAMERA3_TEMPLATE_PREVIEW = 1
-    mTemplates[1] = new Metadata(ANDROID_CONTROL_MODE_OFF,
-            ANDROID_CONTROL_CAPTURE_INTENT_PREVIEW);
-    // CAMERA3_TEMPLATE_STILL_CAPTURE = 2
-    mTemplates[2] = new Metadata(ANDROID_CONTROL_MODE_OFF,
-            ANDROID_CONTROL_CAPTURE_INTENT_STILL_CAPTURE);
-    // CAMERA3_TEMPLATE_VIDEO_RECORD = 3
-    mTemplates[3] = new Metadata(ANDROID_CONTROL_MODE_OFF,
-            ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_RECORD);
-    // CAMERA3_TEMPLATE_VIDEO_SNAPSHOT = 4
-    mTemplates[4] = new Metadata(ANDROID_CONTROL_MODE_OFF,
-            ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT);
-    // CAMERA3_TEMPLATE_STILL_ZERO_SHUTTER_LAG = 5
-    mTemplates[5] = new Metadata(ANDROID_CONTROL_MODE_OFF,
-            ANDROID_CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG);
-    // Pre-generate metadata structures
-    for (int i = 1; i < CAMERA3_TEMPLATE_COUNT; i++) {
-        mTemplates[i]->generate();
+    // per-device specific initialization
+    res = initDevice();
+    if (res != 0) {
+        ALOGE("%s:%d: Failed to initialize device!", __func__, mId);
+        return res;
     }
-    // TODO: create vendor templates
     return 0;
 }
 
-camera_metadata_t *Camera::initStaticInfo()
-{
-    /*
-     * Setup static camera info.  This will have to customized per camera
-     * device.
-     */
-    Metadata m;
-
-    /* android.control */
-    int32_t android_control_ae_available_target_fps_ranges[] = {30, 30};
-    m.addInt32(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES,
-            ARRAY_SIZE(android_control_ae_available_target_fps_ranges),
-            android_control_ae_available_target_fps_ranges);
-
-    int32_t android_control_ae_compensation_range[] = {-4, 4};
-    m.addInt32(ANDROID_CONTROL_AE_COMPENSATION_RANGE,
-            ARRAY_SIZE(android_control_ae_compensation_range),
-            android_control_ae_compensation_range);
-
-    camera_metadata_rational_t android_control_ae_compensation_step[] = {{2,1}};
-    m.addRational(ANDROID_CONTROL_AE_COMPENSATION_STEP,
-            ARRAY_SIZE(android_control_ae_compensation_step),
-            android_control_ae_compensation_step);
-
-    int32_t android_control_max_regions[] = {1};
-    m.addInt32(ANDROID_CONTROL_MAX_REGIONS,
-            ARRAY_SIZE(android_control_max_regions),
-            android_control_max_regions);
-
-    /* android.jpeg */
-    int32_t android_jpeg_available_thumbnail_sizes[] = {0, 0, 128, 96};
-    m.addInt32(ANDROID_JPEG_AVAILABLE_THUMBNAIL_SIZES,
-            ARRAY_SIZE(android_jpeg_available_thumbnail_sizes),
-            android_jpeg_available_thumbnail_sizes);
-
-    /* android.lens */
-    float android_lens_info_available_focal_lengths[] = {1.0};
-    m.addFloat(ANDROID_LENS_INFO_AVAILABLE_FOCAL_LENGTHS,
-            ARRAY_SIZE(android_lens_info_available_focal_lengths),
-            android_lens_info_available_focal_lengths);
-
-    /* android.request */
-    int32_t android_request_max_num_output_streams[] = {0, 3, 1};
-    m.addInt32(ANDROID_REQUEST_MAX_NUM_OUTPUT_STREAMS,
-            ARRAY_SIZE(android_request_max_num_output_streams),
-            android_request_max_num_output_streams);
-
-    /* android.scaler */
-    int32_t android_scaler_available_formats[] = {
-            HAL_PIXEL_FORMAT_RAW_SENSOR,
-            HAL_PIXEL_FORMAT_BLOB,
-            HAL_PIXEL_FORMAT_RGBA_8888,
-            HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED,
-            // These are handled by YCbCr_420_888
-            //        HAL_PIXEL_FORMAT_YV12,
-            //        HAL_PIXEL_FORMAT_YCrCb_420_SP,
-            HAL_PIXEL_FORMAT_YCbCr_420_888};
-    m.addInt32(ANDROID_SCALER_AVAILABLE_FORMATS,
-            ARRAY_SIZE(android_scaler_available_formats),
-            android_scaler_available_formats);
-
-    int64_t android_scaler_available_jpeg_min_durations[] = {1};
-    m.addInt64(ANDROID_SCALER_AVAILABLE_JPEG_MIN_DURATIONS,
-            ARRAY_SIZE(android_scaler_available_jpeg_min_durations),
-            android_scaler_available_jpeg_min_durations);
-
-    int32_t android_scaler_available_jpeg_sizes[] = {640, 480};
-    m.addInt32(ANDROID_SCALER_AVAILABLE_JPEG_SIZES,
-            ARRAY_SIZE(android_scaler_available_jpeg_sizes),
-            android_scaler_available_jpeg_sizes);
-
-    float android_scaler_available_max_digital_zoom[] = {1};
-    m.addFloat(ANDROID_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM,
-            ARRAY_SIZE(android_scaler_available_max_digital_zoom),
-            android_scaler_available_max_digital_zoom);
-
-    int64_t android_scaler_available_processed_min_durations[] = {1};
-    m.addInt64(ANDROID_SCALER_AVAILABLE_PROCESSED_MIN_DURATIONS,
-            ARRAY_SIZE(android_scaler_available_processed_min_durations),
-            android_scaler_available_processed_min_durations);
-
-    int32_t android_scaler_available_processed_sizes[] = {640, 480};
-    m.addInt32(ANDROID_SCALER_AVAILABLE_PROCESSED_SIZES,
-            ARRAY_SIZE(android_scaler_available_processed_sizes),
-            android_scaler_available_processed_sizes);
-
-    int64_t android_scaler_available_raw_min_durations[] = {1};
-    m.addInt64(ANDROID_SCALER_AVAILABLE_RAW_MIN_DURATIONS,
-            ARRAY_SIZE(android_scaler_available_raw_min_durations),
-            android_scaler_available_raw_min_durations);
-
-    int32_t android_scaler_available_raw_sizes[] = {640, 480};
-    m.addInt32(ANDROID_SCALER_AVAILABLE_RAW_SIZES,
-            ARRAY_SIZE(android_scaler_available_raw_sizes),
-            android_scaler_available_raw_sizes);
-
-    /* android.sensor */
-
-    int32_t android_sensor_info_active_array_size[] = {0, 0, 640, 480};
-    m.addInt32(ANDROID_SENSOR_INFO_ACTIVE_ARRAY_SIZE,
-            ARRAY_SIZE(android_sensor_info_active_array_size),
-            android_sensor_info_active_array_size);
-
-    int32_t android_sensor_info_sensitivity_range[] =
-            {100, 1600};
-    m.addInt32(ANDROID_SENSOR_INFO_SENSITIVITY_RANGE,
-            ARRAY_SIZE(android_sensor_info_sensitivity_range),
-            android_sensor_info_sensitivity_range);
-
-    int64_t android_sensor_info_max_frame_duration[] = {30000000000};
-    m.addInt64(ANDROID_SENSOR_INFO_MAX_FRAME_DURATION,
-            ARRAY_SIZE(android_sensor_info_max_frame_duration),
-            android_sensor_info_max_frame_duration);
-
-    float android_sensor_info_physical_size[] = {3.2, 2.4};
-    m.addFloat(ANDROID_SENSOR_INFO_PHYSICAL_SIZE,
-            ARRAY_SIZE(android_sensor_info_physical_size),
-            android_sensor_info_physical_size);
-
-    int32_t android_sensor_info_pixel_array_size[] = {640, 480};
-    m.addInt32(ANDROID_SENSOR_INFO_PIXEL_ARRAY_SIZE,
-            ARRAY_SIZE(android_sensor_info_pixel_array_size),
-            android_sensor_info_pixel_array_size);
-
-    int32_t android_sensor_orientation[] = {0};
-    m.addInt32(ANDROID_SENSOR_ORIENTATION,
-            ARRAY_SIZE(android_sensor_orientation),
-            android_sensor_orientation);
-
-    /* End of static camera characteristics */
-
-    return clone_camera_metadata(m.generate());
-}
-
 int Camera::configureStreams(camera3_stream_configuration_t *stream_config)
 {
     camera3_stream_t *astream;
     Stream **newStreams = NULL;
 
-    CAMTRACE_CALL();
+    ATRACE_CALL();
     ALOGV("%s:%d: stream_config=%p", __func__, mId, stream_config);
 
     if (stream_config == NULL) {
@@ -469,15 +322,20 @@
     return stream->registerBuffers(buf_set);
 }
 
+bool Camera::isValidTemplateType(int type)
+{
+    return type < 1 || type >= CAMERA3_TEMPLATE_COUNT;
+}
+
 const camera_metadata_t* Camera::constructDefaultRequestSettings(int type)
 {
     ALOGV("%s:%d: type=%d", __func__, mId, type);
 
-    if (type < 1 || type >= CAMERA3_TEMPLATE_COUNT) {
+    if (!isValidTemplateType(type)) {
         ALOGE("%s:%d: Invalid template request type: %d", __func__, mId, type);
         return NULL;
     }
-    return mTemplates[type]->generate();
+    return mTemplates[type];
 }
 
 int Camera::processCaptureRequest(camera3_capture_request_t *request)
@@ -485,7 +343,7 @@
     camera3_capture_result result;
 
     ALOGV("%s:%d: request=%p", __func__, mId, request);
-    CAMTRACE_CALL();
+    ATRACE_CALL();
 
     if (request == NULL) {
         ALOGE("%s:%d: NULL request recieved", __func__, mId);
@@ -565,12 +423,6 @@
         mSettings = clone_camera_metadata(new_settings);
 }
 
-bool Camera::isValidCaptureSettings(const camera_metadata_t* /*settings*/)
-{
-    // TODO: reject settings that cannot be captured
-    return true;
-}
-
 bool Camera::isValidReprocessSettings(const camera_metadata_t* /*settings*/)
 {
     // TODO: reject settings that cannot be reprocessed
@@ -640,7 +492,64 @@
 void Camera::dump(int fd)
 {
     ALOGV("%s:%d: Dumping to fd %d", __func__, mId, fd);
-    // TODO: dprintf all relevant state to fd
+
+    pthread_mutex_lock(&mMutex);
+
+    fdprintf(fd, "Camera ID: %d (Busy: %d)\n", mId, mBusy);
+
+    // TODO: dump all settings
+    fdprintf(fd, "Most Recent Settings: (%p)\n", mSettings);
+
+    fdprintf(fd, "Number of streams: %d\n", mNumStreams);
+    for (int i = 0; i < mNumStreams; i++) {
+        fdprintf(fd, "Stream %d/%d:\n", i, mNumStreams);
+        mStreams[i]->dump(fd);
+    }
+
+    pthread_mutex_unlock(&mMutex);
+}
+
+const char* Camera::templateToString(int type)
+{
+    switch (type) {
+    case CAMERA3_TEMPLATE_PREVIEW:
+        return "CAMERA3_TEMPLATE_PREVIEW";
+    case CAMERA3_TEMPLATE_STILL_CAPTURE:
+        return "CAMERA3_TEMPLATE_STILL_CAPTURE";
+    case CAMERA3_TEMPLATE_VIDEO_RECORD:
+        return "CAMERA3_TEMPLATE_VIDEO_RECORD";
+    case CAMERA3_TEMPLATE_VIDEO_SNAPSHOT:
+        return "CAMERA3_TEMPLATE_VIDEO_SNAPSHOT";
+    case CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG:
+        return "CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG";
+    }
+    // TODO: support vendor templates
+    return "Invalid template type!";
+}
+
+int Camera::setTemplate(int type, camera_metadata_t *settings)
+{
+    if (!isValidTemplateType(type)) {
+        ALOGE("%s:%d: Invalid template request type: %d", __func__, mId, type);
+        return -EINVAL;
+    }
+    pthread_mutex_lock(&mMutex);
+    if (mTemplates[type] != NULL) {
+        ALOGE("%s:%d: Setting already constructed template type %s(%d)",
+                __func__, mId, templateToString(type), type);
+        pthread_mutex_unlock(&mMutex);
+        return -EINVAL;
+    }
+    // Make a durable copy of the underlying metadata
+    mTemplates[type] = clone_camera_metadata(settings);
+    if (mTemplates[type] == NULL) {
+        ALOGE("%s:%d: Failed to clone metadata %p for template type %s(%d)",
+                __func__, mId, settings, templateToString(type), type);
+        pthread_mutex_unlock(&mMutex);
+        return -EINVAL;
+    }
+    pthread_mutex_unlock(&mMutex);
+    return 0;
 }
 
 extern "C" {
diff --git a/modules/camera/Camera.h b/modules/camera/Camera.h
index be672f9..4c869bb 100644
--- a/modules/camera/Camera.h
+++ b/modules/camera/Camera.h
@@ -28,12 +28,14 @@
 // This is constructed when the HAL module is loaded, one per physical camera.
 // It is opened by the framework, and must be closed before it can be opened
 // again.
+// This is an abstract class, containing all logic and data shared between all
+// camera devices (front, back, etc) and common to the ISP.
 class Camera {
     public:
         // id is used to distinguish cameras. 0 <= id < NUM_CAMERAS.
         // module is a handle to the HAL module, used when the device is opened.
         Camera(int id);
-        ~Camera();
+        virtual ~Camera();
 
         // Common Camera Device Operations (see <hardware/camera_common.h>)
         int open(const hw_module_t *module, hw_device_t **device);
@@ -49,12 +51,22 @@
         void getMetadataVendorTagOps(vendor_tag_query_ops_t *ops);
         void dump(int fd);
 
-        // Camera device handle returned to framework for use
-        camera3_device_t mDevice;
+
+    protected:
+        // Initialize static camera characteristics for individual device
+        virtual camera_metadata_t *initStaticInfo() = 0;
+        // Verify settings are valid for a capture
+        virtual bool isValidCaptureSettings(const camera_metadata_t *) = 0;
+        // Separate initialization method for individual devices when opened
+        virtual int initDevice() = 0;
+        // Accessor used by initDevice() to set the templates' metadata
+        int setTemplate(int type, camera_metadata_t *static_info);
+        // Prettyprint template names
+        const char* templateToString(int type);
 
     private:
-        // Separate initialization method for static metadata
-        camera_metadata_t *initStaticInfo();
+        // Camera device handle returned to framework for use
+        camera3_device_t mDevice;
         // Reuse a stream already created by this device
         Stream *reuseStream(camera3_stream_t *astream);
         // Destroy all streams in a stream array, and the array itself
@@ -65,8 +77,6 @@
         void setupStreams(Stream **array, int count);
         // Copy new settings for re-use and clean up old settings.
         void setSettings(const camera_metadata_t *new_settings);
-        // Verify settings are valid for a capture
-        bool isValidCaptureSettings(const camera_metadata_t *settings);
         // Verify settings are valid for reprocessing an input buffer
         bool isValidReprocessSettings(const camera_metadata_t *settings);
         // Process an output buffer
@@ -74,6 +84,8 @@
                 camera3_stream_buffer_t *out);
         // Send a shutter notify message with start of exposure time
         void notifyShutter(uint32_t frame_number, uint64_t timestamp);
+        // Is type a valid template type (and valid index into mTemplates)
+        bool isValidTemplateType(int type);
 
         // Identifier used by framework to distinguish cameras
         const int mId;
@@ -97,7 +109,7 @@
         // Number of streams in mStreams
         int mNumStreams;
         // Static array of standard camera settings templates
-        Metadata *mTemplates[CAMERA3_TEMPLATE_COUNT];
+        camera_metadata_t *mTemplates[CAMERA3_TEMPLATE_COUNT];
         // Most recent request settings seen, memoized to be reused
         camera_metadata_t *mSettings;
 };
diff --git a/modules/camera/CameraHAL.cpp b/modules/camera/CameraHAL.cpp
index dfbbe4c..148f99c 100644
--- a/modules/camera/CameraHAL.cpp
+++ b/modules/camera/CameraHAL.cpp
@@ -17,7 +17,8 @@
 #include <cstdlib>
 #include <hardware/camera_common.h>
 #include <hardware/hardware.h>
-#include "Camera.h"
+#include "ExampleCamera.h"
+#include "VendorTags.h"
 
 //#define LOG_NDEBUG 0
 #define LOG_TAG "DefaultCameraHAL"
@@ -38,25 +39,24 @@
 
 // Default Camera HAL has 2 cameras, front and rear.
 static CameraHAL gCameraHAL(2);
+// Handle containing vendor tag functionality
+static VendorTags gVendorTags;
 
 CameraHAL::CameraHAL(int num_cameras)
   : mNumberOfCameras(num_cameras),
     mCallbacks(NULL)
 {
-    int i;
-
     // Allocate camera array and instantiate camera devices
     mCameras = new Camera*[mNumberOfCameras];
-    for (i = 0; i < mNumberOfCameras; i++) {
-        mCameras[i] = new Camera(i);
-    }
+    // Rear camera
+    mCameras[0] = new ExampleCamera(0);
+    // Front camera
+    mCameras[1] = new ExampleCamera(1);
 }
 
 CameraHAL::~CameraHAL()
 {
-    int i;
-
-    for (i = 0; i < mNumberOfCameras; i++) {
+    for (int i = 0; i < mNumberOfCameras; i++) {
         delete mCameras[i];
     }
     delete [] mCameras;
@@ -124,6 +124,41 @@
     return gCameraHAL.setCallbacks(callbacks);
 }
 
+static int get_tag_count(const vendor_tag_ops_t* ops)
+{
+    return gVendorTags.getTagCount(ops);
+}
+
+static void get_all_tags(const vendor_tag_ops_t* ops, uint32_t* tag_array)
+{
+    gVendorTags.getAllTags(ops, tag_array);
+}
+
+static const char* get_section_name(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    return gVendorTags.getSectionName(ops, tag);
+}
+
+static const char* get_tag_name(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    return gVendorTags.getTagName(ops, tag);
+}
+
+static int get_tag_type(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    return gVendorTags.getTagType(ops, tag);
+}
+
+static void get_vendor_tag_ops(vendor_tag_ops_t* ops)
+{
+    ALOGV("%s : ops=%p", __func__, ops);
+    ops->get_tag_count      = get_tag_count;
+    ops->get_all_tags       = get_all_tags;
+    ops->get_section_name   = get_section_name;
+    ops->get_tag_name       = get_tag_name;
+    ops->get_tag_type       = get_tag_type;
+}
+
 static int open_dev(const hw_module_t* mod, const char* name, hw_device_t** dev)
 {
     return gCameraHAL.open(mod, name, dev);
@@ -136,7 +171,7 @@
 camera_module_t HAL_MODULE_INFO_SYM __attribute__ ((visibility("default"))) = {
     common : {
         tag                : HARDWARE_MODULE_TAG,
-        module_api_version : CAMERA_MODULE_API_VERSION_2_0,
+        module_api_version : CAMERA_MODULE_API_VERSION_2_2,
         hal_api_version    : HARDWARE_HAL_API_VERSION,
         id                 : CAMERA_HARDWARE_MODULE_ID,
         name               : "Default Camera HAL",
@@ -147,7 +182,8 @@
     },
     get_number_of_cameras : get_number_of_cameras,
     get_camera_info       : get_camera_info,
-    set_callbacks         : set_callbacks
+    set_callbacks         : set_callbacks,
+    get_vendor_tag_ops    : get_vendor_tag_ops
 };
 } // extern "C"
 
diff --git a/modules/camera/CameraHAL.h b/modules/camera/CameraHAL.h
index ba0db4e..a5edc85 100644
--- a/modules/camera/CameraHAL.h
+++ b/modules/camera/CameraHAL.h
@@ -21,6 +21,7 @@
 #include <hardware/hardware.h>
 #include <hardware/camera_common.h>
 #include "Camera.h"
+#include "VendorTags.h"
 
 namespace default_camera_hal {
 // CameraHAL contains all module state that isn't specific to an individual
@@ -34,6 +35,7 @@
         int getNumberOfCameras();
         int getCameraInfo(int camera_id, struct camera_info *info);
         int setCallbacks(const camera_module_callbacks_t *callbacks);
+        void getVendorTagOps(vendor_tag_ops_t* ops);
 
         // Hardware Module Interface (see <hardware/hardware.h>)
         int open(const hw_module_t* mod, const char* name, hw_device_t** dev);
diff --git a/modules/camera/ExampleCamera.cpp b/modules/camera/ExampleCamera.cpp
new file mode 100644
index 0000000..16e1e02
--- /dev/null
+++ b/modules/camera/ExampleCamera.cpp
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2013 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 <system/camera_metadata.h>
+#include "Camera.h"
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "ExampleCamera"
+#include <cutils/log.h>
+
+#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
+#include <utils/Trace.h>
+
+#include "ExampleCamera.h"
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+namespace default_camera_hal {
+
+ExampleCamera::ExampleCamera(int id) : Camera(id)
+{
+}
+
+ExampleCamera::~ExampleCamera()
+{
+}
+
+camera_metadata_t *ExampleCamera::initStaticInfo()
+{
+    /*
+     * Setup static camera info.  This will have to customized per camera
+     * device.
+     */
+    Metadata m;
+
+    /* android.control */
+    int32_t android_control_ae_available_target_fps_ranges[] = {30, 30};
+    m.addInt32(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES,
+            ARRAY_SIZE(android_control_ae_available_target_fps_ranges),
+            android_control_ae_available_target_fps_ranges);
+
+    int32_t android_control_ae_compensation_range[] = {-4, 4};
+    m.addInt32(ANDROID_CONTROL_AE_COMPENSATION_RANGE,
+            ARRAY_SIZE(android_control_ae_compensation_range),
+            android_control_ae_compensation_range);
+
+    camera_metadata_rational_t android_control_ae_compensation_step[] = {{2,1}};
+    m.addRational(ANDROID_CONTROL_AE_COMPENSATION_STEP,
+            ARRAY_SIZE(android_control_ae_compensation_step),
+            android_control_ae_compensation_step);
+
+    int32_t android_control_max_regions[] = {1};
+    m.addInt32(ANDROID_CONTROL_MAX_REGIONS,
+            ARRAY_SIZE(android_control_max_regions),
+            android_control_max_regions);
+
+    /* android.jpeg */
+    int32_t android_jpeg_available_thumbnail_sizes[] = {0, 0, 128, 96};
+    m.addInt32(ANDROID_JPEG_AVAILABLE_THUMBNAIL_SIZES,
+            ARRAY_SIZE(android_jpeg_available_thumbnail_sizes),
+            android_jpeg_available_thumbnail_sizes);
+
+    int32_t android_jpeg_max_size[] = {13 * 1024 * 1024}; // 13MB
+    m.addInt32(ANDROID_JPEG_MAX_SIZE,
+            ARRAY_SIZE(android_jpeg_max_size),
+            android_jpeg_max_size);
+
+    /* android.lens */
+    float android_lens_info_available_focal_lengths[] = {1.0};
+    m.addFloat(ANDROID_LENS_INFO_AVAILABLE_FOCAL_LENGTHS,
+            ARRAY_SIZE(android_lens_info_available_focal_lengths),
+            android_lens_info_available_focal_lengths);
+
+    /* android.request */
+    int32_t android_request_max_num_output_streams[] = {0, 3, 1};
+    m.addInt32(ANDROID_REQUEST_MAX_NUM_OUTPUT_STREAMS,
+            ARRAY_SIZE(android_request_max_num_output_streams),
+            android_request_max_num_output_streams);
+
+    /* android.scaler */
+    int32_t android_scaler_available_formats[] = {
+            HAL_PIXEL_FORMAT_RAW_SENSOR,
+            HAL_PIXEL_FORMAT_BLOB,
+            HAL_PIXEL_FORMAT_RGBA_8888,
+            HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED,
+            // These are handled by YCbCr_420_888
+            //        HAL_PIXEL_FORMAT_YV12,
+            //        HAL_PIXEL_FORMAT_YCrCb_420_SP,
+            HAL_PIXEL_FORMAT_YCbCr_420_888};
+    m.addInt32(ANDROID_SCALER_AVAILABLE_FORMATS,
+            ARRAY_SIZE(android_scaler_available_formats),
+            android_scaler_available_formats);
+
+    int64_t android_scaler_available_jpeg_min_durations[] = {1};
+    m.addInt64(ANDROID_SCALER_AVAILABLE_JPEG_MIN_DURATIONS,
+            ARRAY_SIZE(android_scaler_available_jpeg_min_durations),
+            android_scaler_available_jpeg_min_durations);
+
+    int32_t android_scaler_available_jpeg_sizes[] = {640, 480};
+    m.addInt32(ANDROID_SCALER_AVAILABLE_JPEG_SIZES,
+            ARRAY_SIZE(android_scaler_available_jpeg_sizes),
+            android_scaler_available_jpeg_sizes);
+
+    float android_scaler_available_max_digital_zoom[] = {1};
+    m.addFloat(ANDROID_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM,
+            ARRAY_SIZE(android_scaler_available_max_digital_zoom),
+            android_scaler_available_max_digital_zoom);
+
+    int64_t android_scaler_available_processed_min_durations[] = {1};
+    m.addInt64(ANDROID_SCALER_AVAILABLE_PROCESSED_MIN_DURATIONS,
+            ARRAY_SIZE(android_scaler_available_processed_min_durations),
+            android_scaler_available_processed_min_durations);
+
+    int32_t android_scaler_available_processed_sizes[] = {640, 480};
+    m.addInt32(ANDROID_SCALER_AVAILABLE_PROCESSED_SIZES,
+            ARRAY_SIZE(android_scaler_available_processed_sizes),
+            android_scaler_available_processed_sizes);
+
+    int64_t android_scaler_available_raw_min_durations[] = {1};
+    m.addInt64(ANDROID_SCALER_AVAILABLE_RAW_MIN_DURATIONS,
+            ARRAY_SIZE(android_scaler_available_raw_min_durations),
+            android_scaler_available_raw_min_durations);
+
+    int32_t android_scaler_available_raw_sizes[] = {640, 480};
+    m.addInt32(ANDROID_SCALER_AVAILABLE_RAW_SIZES,
+            ARRAY_SIZE(android_scaler_available_raw_sizes),
+            android_scaler_available_raw_sizes);
+
+    /* android.sensor */
+
+    int32_t android_sensor_info_active_array_size[] = {0, 0, 640, 480};
+    m.addInt32(ANDROID_SENSOR_INFO_ACTIVE_ARRAY_SIZE,
+            ARRAY_SIZE(android_sensor_info_active_array_size),
+            android_sensor_info_active_array_size);
+
+    int32_t android_sensor_info_sensitivity_range[] =
+            {100, 1600};
+    m.addInt32(ANDROID_SENSOR_INFO_SENSITIVITY_RANGE,
+            ARRAY_SIZE(android_sensor_info_sensitivity_range),
+            android_sensor_info_sensitivity_range);
+
+    int64_t android_sensor_info_max_frame_duration[] = {30000000000};
+    m.addInt64(ANDROID_SENSOR_INFO_MAX_FRAME_DURATION,
+            ARRAY_SIZE(android_sensor_info_max_frame_duration),
+            android_sensor_info_max_frame_duration);
+
+    float android_sensor_info_physical_size[] = {3.2, 2.4};
+    m.addFloat(ANDROID_SENSOR_INFO_PHYSICAL_SIZE,
+            ARRAY_SIZE(android_sensor_info_physical_size),
+            android_sensor_info_physical_size);
+
+    int32_t android_sensor_info_pixel_array_size[] = {640, 480};
+    m.addInt32(ANDROID_SENSOR_INFO_PIXEL_ARRAY_SIZE,
+            ARRAY_SIZE(android_sensor_info_pixel_array_size),
+            android_sensor_info_pixel_array_size);
+
+    int32_t android_sensor_orientation[] = {0};
+    m.addInt32(ANDROID_SENSOR_ORIENTATION,
+            ARRAY_SIZE(android_sensor_orientation),
+            android_sensor_orientation);
+
+    /* End of static camera characteristics */
+
+    return clone_camera_metadata(m.get());
+}
+
+int ExampleCamera::initDevice()
+{
+    int res;
+    Metadata base;
+
+    // Create standard settings templates from copies of base metadata
+    // TODO: use vendor tags in base metadata
+    if (res = base.add1UInt8(ANDROID_CONTROL_MODE, ANDROID_CONTROL_MODE_OFF))
+        return res;
+
+    // Use base settings to create all other templates and set them
+    if (res = setPreviewTemplate(base)) return res;
+    if (res = setStillTemplate(base)) return res;
+    if (res = setRecordTemplate(base)) return res;
+    if (res = setSnapshotTemplate(base)) return res;
+    if (res = setZslTemplate(base)) return res;
+
+    return 0;
+}
+
+int ExampleCamera::setPreviewTemplate(Metadata m)
+{
+    int res;
+    // Setup default preview controls
+    if (res = m.add1UInt8(ANDROID_CONTROL_CAPTURE_INTENT,
+            ANDROID_CONTROL_CAPTURE_INTENT_PREVIEW))
+        return res;
+    // TODO: set fast auto-focus, auto-whitebalance, auto-exposure, auto flash
+    return setTemplate(CAMERA3_TEMPLATE_PREVIEW, m.get());
+}
+
+int ExampleCamera::setStillTemplate(Metadata m)
+{
+    int res;
+    // Setup default still capture controls
+    if (res = m.add1UInt8(ANDROID_CONTROL_CAPTURE_INTENT,
+            ANDROID_CONTROL_CAPTURE_INTENT_STILL_CAPTURE))
+        return res;
+    // TODO: set fast auto-focus, auto-whitebalance, auto-exposure, auto flash
+    return setTemplate(CAMERA3_TEMPLATE_STILL_CAPTURE, m.get());
+}
+
+int ExampleCamera::setRecordTemplate(Metadata m)
+{
+    int res;
+    // Setup default video record controls
+    if (res = m.add1UInt8(ANDROID_CONTROL_CAPTURE_INTENT,
+            ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_RECORD))
+        return res;
+    // TODO: set slow auto-focus, auto-whitebalance, auto-exposure, flash off
+    return setTemplate(CAMERA3_TEMPLATE_VIDEO_RECORD, m.get());
+}
+
+int ExampleCamera::setSnapshotTemplate(Metadata m)
+{
+    int res;
+    // Setup default video snapshot controls
+    if (res = m.add1UInt8(ANDROID_CONTROL_CAPTURE_INTENT,
+            ANDROID_CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT))
+        return res;
+    // TODO: set slow auto-focus, auto-whitebalance, auto-exposure, flash off 
+    return setTemplate(CAMERA3_TEMPLATE_VIDEO_SNAPSHOT, m.get());
+}
+
+int ExampleCamera::setZslTemplate(Metadata m)
+{
+    int res;
+    // Setup default zero shutter lag controls
+    if (res = m.add1UInt8(ANDROID_CONTROL_CAPTURE_INTENT,
+            ANDROID_CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG))
+        return res;
+    // TODO: set reprocessing parameters for zsl input queue
+    return setTemplate(CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG, m.get());
+}
+
+bool ExampleCamera::isValidCaptureSettings(const camera_metadata_t* settings)
+{
+    // TODO: reject settings that cannot be captured
+    return true;
+}
+
+} // namespace default_camera_hal
diff --git a/modules/camera/ExampleCamera.h b/modules/camera/ExampleCamera.h
new file mode 100644
index 0000000..45c4a94
--- /dev/null
+++ b/modules/camera/ExampleCamera.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2013 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 EXAMPLE_CAMERA_H_
+#define EXAMPLE_CAMERA_H_
+
+#include <system/camera_metadata.h>
+#include "Camera.h"
+
+namespace default_camera_hal {
+// ExampleCamera is an example for a specific camera device. The Camera object
+// contains all logic common between all cameras (e.g. front and back cameras),
+// while a specific camera device (e.g. ExampleCamera) holds all specific
+// metadata and logic about that device.
+class ExampleCamera : public Camera {
+    public:
+        ExampleCamera(int id);
+        ~ExampleCamera();
+
+    private:
+        // Initialize static camera characteristics for individual device
+        camera_metadata_t *initStaticInfo();
+        // Initialize whole device (templates/etc) when opened
+        int initDevice();
+        // Initialize each template metadata controls
+        int setPreviewTemplate(Metadata m);
+        int setStillTemplate(Metadata m);
+        int setRecordTemplate(Metadata m);
+        int setSnapshotTemplate(Metadata m);
+        int setZslTemplate(Metadata m);
+        // Verify settings are valid for a capture with this device
+        bool isValidCaptureSettings(const camera_metadata_t* settings);
+};
+} // namespace default_camera_hal
+
+#endif // CAMERA_H_
diff --git a/modules/camera/Metadata.cpp b/modules/camera/Metadata.cpp
index d5854f9..72314d5 100644
--- a/modules/camera/Metadata.cpp
+++ b/modules/camera/Metadata.cpp
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-#include <pthread.h>
 #include <system/camera_metadata.h>
 
 //#define LOG_NDEBUG 0
@@ -22,102 +21,85 @@
 #include <cutils/log.h>
 
 #define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
-#include <cutils/trace.h>
-#include "ScopedTrace.h"
+#include <utils/Trace.h>
 
 #include "Metadata.h"
 
 namespace default_camera_hal {
 
-Metadata::Metadata()
-  : mHead(NULL),
-    mTail(NULL),
-    mEntryCount(0),
-    mDataCount(0),
-    mGenerated(NULL),
-    mDirty(true)
+Metadata::Metadata():
+    mData(NULL)
 {
-    // NULL (default) pthread mutex attributes
-    pthread_mutex_init(&mMutex, NULL);
 }
 
 Metadata::~Metadata()
 {
-    Entry *current = mHead;
-
-    while (current != NULL) {
-        Entry *tmp = current;
-        current = current->mNext;
-        delete tmp;
-    }
-
-    if (mGenerated != NULL)
-        free_camera_metadata(mGenerated);
-
-    pthread_mutex_destroy(&mMutex);
+    replace(NULL);
 }
 
-Metadata::Metadata(uint8_t mode, uint8_t intent)
-  : mHead(NULL),
-    mTail(NULL),
-    mEntryCount(0),
-    mDataCount(0),
-    mGenerated(NULL),
-    mDirty(true)
+void Metadata::replace(camera_metadata_t *m)
 {
-    pthread_mutex_init(&mMutex, NULL);
-
-    if (validate(ANDROID_CONTROL_MODE, TYPE_BYTE, 1)) {
-        int res = add(ANDROID_CONTROL_MODE, 1, &mode);
-        if (res != 0) {
-            ALOGE("%s: Unable to add mode to template!", __func__);
-        }
-    } else {
-        ALOGE("%s: Invalid mode constructing template!", __func__);
+    if (m == mData) {
+        ALOGE("%s: Replacing metadata with itself?!", __func__);
+        return;
     }
-
-    if (validate(ANDROID_CONTROL_CAPTURE_INTENT, TYPE_BYTE, 1)) {
-        int res = add(ANDROID_CONTROL_CAPTURE_INTENT, 1, &intent);
-        if (res != 0) {
-            ALOGE("%s: Unable to add capture intent to template!", __func__);
-        }
-    } else {
-        ALOGE("%s: Invalid capture intent constructing template!", __func__);
-    }
+    if (mData)
+        free_camera_metadata(mData);
+    mData = m;
 }
 
-int Metadata::addUInt8(uint32_t tag, int count, uint8_t *data)
+int Metadata::init(const camera_metadata_t *metadata)
+{
+    camera_metadata_t* tmp;
+
+    if (!validate_camera_metadata_structure(metadata, NULL))
+        return -EINVAL;
+
+    tmp = clone_camera_metadata(metadata);
+    if (tmp == NULL)
+        return -EINVAL;
+
+    replace(tmp);
+    return 0;
+}
+
+int Metadata::addUInt8(uint32_t tag, int count, const uint8_t *data)
 {
     if (!validate(tag, TYPE_BYTE, count)) return -EINVAL;
     return add(tag, count, data);
 }
 
-int Metadata::addInt32(uint32_t tag, int count, int32_t *data)
+int Metadata::add1UInt8(uint32_t tag, const uint8_t data)
+{
+    return addUInt8(tag, 1, &data);
+}
+
+int Metadata::addInt32(uint32_t tag, int count, const int32_t *data)
 {
     if (!validate(tag, TYPE_INT32, count)) return -EINVAL;
     return add(tag, count, data);
 }
 
-int Metadata::addFloat(uint32_t tag, int count, float *data)
+int Metadata::addFloat(uint32_t tag, int count, const float *data)
 {
     if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL;
     return add(tag, count, data);
 }
 
-int Metadata::addInt64(uint32_t tag, int count, int64_t *data)
+int Metadata::addInt64(uint32_t tag, int count, const int64_t *data)
 {
     if (!validate(tag, TYPE_INT64, count)) return -EINVAL;
     return add(tag, count, data);
 }
 
-int Metadata::addDouble(uint32_t tag, int count, double *data)
+int Metadata::addDouble(uint32_t tag, int count, const double *data)
 {
     if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL;
     return add(tag, count, data);
 }
 
 int Metadata::addRational(uint32_t tag, int count,
-        camera_metadata_rational_t *data)
+        const camera_metadata_rational_t *data)
 {
     if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL;
     return add(tag, count, data);
@@ -145,102 +127,46 @@
     return true;
 }
 
-int Metadata::add(uint32_t tag, int count, void *tag_data)
+int Metadata::add(uint32_t tag, int count, const void *tag_data)
 {
+    int res;
+    camera_metadata_t* tmp;
     int tag_type = get_camera_metadata_tag_type(tag);
-    size_t type_sz = camera_metadata_type_size[tag_type];
+    size_t size = calculate_camera_metadata_entry_data_size(tag_type, count);
+    size_t entry_capacity = get_camera_metadata_entry_count(mData) + 1;
+    size_t data_capacity = get_camera_metadata_data_count(mData) + size;
 
-    // Allocate array to hold new metadata
-    void *data = malloc(count * type_sz);
-    if (data == NULL)
+    // Opportunistically attempt to add if metadata has room for it
+    if (!add_camera_metadata_entry(mData, tag, tag_data, count))
+        return 0;
+
+    // Double new dimensions to minimize future reallocations
+    tmp = allocate_camera_metadata(entry_capacity * 2, data_capacity * 2);
+    if (tmp == NULL) {
+        ALOGE("%s: Failed to allocate new metadata with %d entries, %d data",
+                __func__, entry_capacity, data_capacity);
         return -ENOMEM;
-    memcpy(data, tag_data, count * type_sz);
+    }
+    // Append the current metadata to the new (empty) metadata
+    if (res = append_camera_metadata(tmp, mData)) {
+        ALOGE("%s: Failed to append old metadata %p to new %p",
+                __func__, mData, tmp);
+        return res;
+    }
+    // Add the remaining new item
+    if (res = add_camera_metadata_entry(tmp, tag, tag_data, count)) {
+        ALOGE("%s: Failed to add new entry (%d, %p, %d) to metadata %p",
+                __func__, tag, tag_data, count, tmp);
+        return res;
+    }
 
-    pthread_mutex_lock(&mMutex);
-    mEntryCount++;
-    mDataCount += calculate_camera_metadata_entry_data_size(tag_type, count);
-    push(new Entry(tag, data, count));
-    mDirty = true;
-    pthread_mutex_unlock(&mMutex);
+    replace(tmp);
     return 0;
 }
 
-camera_metadata_t* Metadata::generate()
+camera_metadata_t* Metadata::get()
 {
-    pthread_mutex_lock(&mMutex);
-    // Reuse if old generated metadata still valid
-    if (!mDirty && mGenerated != NULL) {
-        ALOGV("%s: Reusing generated metadata at %p", __func__, mGenerated);
-        goto out;
-    }
-    // Destroy old metadata
-    if (mGenerated != NULL) {
-        ALOGV("%s: Freeing generated metadata at %p", __func__, mGenerated);
-        free_camera_metadata(mGenerated);
-        mGenerated = NULL;
-    }
-    // Generate new metadata structure
-    ALOGV("%s: Generating new camera metadata structure, Entries:%d Data:%d",
-            __func__, mEntryCount, mDataCount);
-    mGenerated = allocate_camera_metadata(mEntryCount, mDataCount);
-    if (mGenerated == NULL) {
-        ALOGE("%s: Failed to allocate metadata (%d entries %d data)",
-                __func__, mEntryCount, mDataCount);
-        goto out;
-    }
-    // Walk list of entries adding each one to newly allocated metadata
-    for (Entry *current = mHead; current != NULL; current = current->mNext) {
-        int res = add_camera_metadata_entry(mGenerated, current->mTag,
-                current->mData, current->mCount);
-        if (res != 0) {
-            ALOGE("%s: Failed to add camera metadata: %d", __func__, res);
-            free_camera_metadata(mGenerated);
-            mGenerated = NULL;
-            goto out;
-        }
-    }
-
-out:
-    pthread_mutex_unlock(&mMutex);
-    return mGenerated;
-}
-
-Metadata::Entry::Entry(uint32_t tag, void *data, int count)
-  : mNext(NULL),
-    mPrev(NULL),
-    mTag(tag),
-    mData(data),
-    mCount(count)
-{
-}
-
-void Metadata::push(Entry *e)
-{
-    if (mHead == NULL) {
-        mHead = mTail = e;
-    } else {
-        mTail->insertAfter(e);
-        mTail = e;
-    }
-}
-
-Metadata::Entry::~Entry()
-{
-    if (mNext != NULL)
-        mNext->mPrev = mPrev;
-    if (mPrev != NULL)
-        mPrev->mNext = mNext;
-}
-
-void Metadata::Entry::insertAfter(Entry *e)
-{
-    if (e == NULL)
-        return;
-    if (mNext != NULL)
-        mNext->mPrev = e;
-    e->mNext = mNext;
-    e->mPrev = this;
-    mNext = e;
+    return mData;
 }
 
 } // namespace default_camera_hal
diff --git a/modules/camera/Metadata.h b/modules/camera/Metadata.h
index 22d2f22..f432d04 100644
--- a/modules/camera/Metadata.h
+++ b/modules/camera/Metadata.h
@@ -17,10 +17,9 @@
 #ifndef METADATA_H_
 #define METADATA_H_
 
+#include <stdint.h>
 #include <hardware/camera3.h>
-#include <hardware/gralloc.h>
 #include <system/camera_metadata.h>
-#include <system/graphics.h>
 
 namespace default_camera_hal {
 // Metadata is a convenience class for dealing with libcamera_metadata
@@ -28,51 +27,32 @@
     public:
         Metadata();
         ~Metadata();
-        // Constructor used for request metadata templates
-        Metadata(uint8_t mode, uint8_t intent);
+        // Initialize with framework metadata
+        int init(const camera_metadata_t *metadata);
 
-        // Parse and add an entry
-        int addUInt8(uint32_t tag, int count, uint8_t *data);
-        int addInt32(uint32_t tag, int count, int32_t *data);
-        int addFloat(uint32_t tag, int count, float *data);
-        int addInt64(uint32_t tag, int count, int64_t *data);
-        int addDouble(uint32_t tag, int count, double *data);
+        // Parse and add an entry. Allocates and copies new storage for *data.
+        int addUInt8(uint32_t tag, int count, const uint8_t *data);
+        int add1UInt8(uint32_t tag, const uint8_t data);
+        int addInt32(uint32_t tag, int count, const int32_t *data);
+        int addFloat(uint32_t tag, int count, const float *data);
+        int addInt64(uint32_t tag, int count, const int64_t *data);
+        int addDouble(uint32_t tag, int count, const double *data);
         int addRational(uint32_t tag, int count,
-                camera_metadata_rational_t *data);
-        // Generate a camera_metadata structure and fill it with internal data
-        camera_metadata_t *generate();
+                const camera_metadata_rational_t *data);
+
+        // Get a handle to the current metadata
+        // This is not a durable handle, and may be destroyed by add*/init
+        camera_metadata_t* get();
 
     private:
+        // Actual internal storage
+        camera_metadata_t* mData;
+        // Destroy old metadata and replace with new
+        void replace(camera_metadata_t *m);
         // Validate the tag, type and count for a metadata entry
         bool validate(uint32_t tag, int tag_type, int count);
-        // Add a verified tag with data to this Metadata structure
-        int add(uint32_t tag, int count, void *tag_data);
-
-        class Entry {
-            public:
-                Entry(uint32_t tag, void *data, int count);
-                ~Entry();
-                Entry *mNext;
-                Entry *mPrev;
-                const uint32_t mTag;
-                const void *mData;
-                const int mCount;
-                void insertAfter(Entry *e);
-        };
-        // List ends
-        Entry *mHead;
-        Entry *mTail;
-        // Append entry to list
-        void push(Entry *e);
-        // Total of entries and entry data size
-        int mEntryCount;
-        int mDataCount;
-        // Save generated metadata, invalidated on update
-        camera_metadata_t *mGenerated;
-        // Flag to force metadata regeneration
-        bool mDirty;
-        // Lock protecting the Metadata object for modifications
-        pthread_mutex_t mMutex;
+        // Add a verified tag with data
+        int add(uint32_t tag, int count, const void *tag_data);
 };
 } // namespace default_camera_hal
 
diff --git a/modules/camera/ScopedTrace.h b/modules/camera/ScopedTrace.h
deleted file mode 100644
index ed00570..0000000
--- a/modules/camera/ScopedTrace.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2013 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 CAMERA_SCOPED_TRACE_H
-#define CAMERA_SCOPED_TRACE_H
-
-#include <stdint.h>
-#include <cutils/trace.h>
-
-// See <cutils/trace.h> for more tracing macros.
-
-// CAMTRACE_NAME traces the beginning and end of the current scope.  To trace
-// the correct start and end times this macro should be declared first in the
-// scope body.
-#define CAMTRACE_NAME(name) ScopedTrace ___tracer(ATRACE_TAG, name)
-// CAMTRACE_CALL is an ATRACE_NAME that uses the current function name.
-#define CAMTRACE_CALL() CAMTRACE_NAME(__FUNCTION__)
-
-namespace default_camera_hal {
-
-class ScopedTrace {
-public:
-inline ScopedTrace(uint64_t tag, const char* name)
-    : mTag(tag) {
-    atrace_begin(mTag,name);
-}
-
-inline ~ScopedTrace() {
-    atrace_end(mTag);
-}
-
-private:
-    uint64_t mTag;
-};
-
-}; // namespace default_camera_hal
-
-#endif // CAMERA_SCOPED_TRACE_H
diff --git a/modules/camera/Stream.cpp b/modules/camera/Stream.cpp
index aae7adb..7703910 100644
--- a/modules/camera/Stream.cpp
+++ b/modules/camera/Stream.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <pthread.h>
+#include <stdio.h>
 #include <hardware/camera3.h>
 #include <hardware/gralloc.h>
 #include <system/graphics.h>
@@ -24,8 +25,7 @@
 #include <cutils/log.h>
 
 #define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
-#include <cutils/trace.h>
-#include "ScopedTrace.h"
+#include <utils/Trace.h>
 
 #include "Stream.h"
 
@@ -95,6 +95,61 @@
         mType == CAMERA3_STREAM_BIDIRECTIONAL;
 }
 
+const char* Stream::typeToString(int type)
+{
+    switch (type) {
+    case CAMERA3_STREAM_INPUT:
+        return "CAMERA3_STREAM_INPUT";
+    case CAMERA3_STREAM_OUTPUT:
+        return "CAMERA3_STREAM_OUTPUT";
+    case CAMERA3_STREAM_BIDIRECTIONAL:
+        return "CAMERA3_STREAM_BIDIRECTIONAL";
+    }
+    return "Invalid stream type!";
+}
+
+const char* Stream::formatToString(int format)
+{
+    // See <system/graphics.h> for full list
+    switch (format) {
+    case HAL_PIXEL_FORMAT_BGRA_8888:
+        return "BGRA 8888";
+    case HAL_PIXEL_FORMAT_RGBA_8888:
+        return "RGBA 8888";
+    case HAL_PIXEL_FORMAT_RGBX_8888:
+        return "RGBX 8888";
+    case HAL_PIXEL_FORMAT_RGB_888:
+        return "RGB 888";
+    case HAL_PIXEL_FORMAT_RGB_565:
+        return "RGB 565";
+    case HAL_PIXEL_FORMAT_sRGB_A_8888:
+        return "sRGB A 8888";
+    case HAL_PIXEL_FORMAT_sRGB_X_8888:
+        return "sRGB B 8888";
+    case HAL_PIXEL_FORMAT_Y8:
+        return "Y8";
+    case HAL_PIXEL_FORMAT_Y16:
+        return "Y16";
+    case HAL_PIXEL_FORMAT_YV12:
+        return "YV12";
+    case HAL_PIXEL_FORMAT_YCbCr_422_SP:
+        return "NV16";
+    case HAL_PIXEL_FORMAT_YCrCb_420_SP:
+        return "NV21";
+    case HAL_PIXEL_FORMAT_YCbCr_422_I:
+        return "YUY2";
+    case HAL_PIXEL_FORMAT_RAW_SENSOR:
+        return "RAW SENSOR";
+    case HAL_PIXEL_FORMAT_BLOB:
+        return "BLOB";
+    case HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED:
+        return "IMPLEMENTATION DEFINED";
+    case HAL_PIXEL_FORMAT_YCbCr_420_888:
+        return "FLEXIBLE YCbCr 420 888";
+    }
+    return "Invalid stream format!";
+}
+
 bool Stream::isRegistered()
 {
     return mRegistered;
@@ -113,15 +168,15 @@
         return false;
     }
     if (s->stream_type != mType) {
-        // TODO: prettyprint type string
-        ALOGE("%s:%d: Mismatched type in reused stream. Got %d expect %d",
-                __func__, mId, s->stream_type, mType);
+        ALOGE("%s:%d: Mismatched type in reused stream. Got %s(%d) "
+                "expect %s(%d)", __func__, mId, typeToString(s->stream_type),
+                s->stream_type, typeToString(mType), mType);
         return false;
     }
     if (s->format != mFormat) {
-        // TODO: prettyprint format string
-        ALOGE("%s:%d: Mismatched format in reused stream. Got %d expect %d",
-                __func__, mId, s->format, mFormat);
+        ALOGE("%s:%d: Mismatched format in reused stream. Got %s(%d) "
+                "expect %s(%d)", __func__, mId, formatToString(s->format),
+                s->format, formatToString(mFormat), mFormat);
         return false;
     }
     if (s->width != mWidth) {
@@ -139,7 +194,7 @@
 
 int Stream::registerBuffers(const camera3_stream_buffer_set_t *buf_set)
 {
-    CAMTRACE_CALL();
+    ATRACE_CALL();
 
     if (buf_set->stream != mStream) {
         ALOGE("%s:%d: Buffer set for invalid stream. Got %p expect %p",
@@ -174,4 +229,24 @@
     // TODO: unregister buffers from hw
 }
 
+void Stream::dump(int fd)
+{
+    pthread_mutex_lock(&mMutex);
+
+    fdprintf(fd, "Stream ID: %d (%p)\n", mId, mStream);
+    fdprintf(fd, "Stream Type: %s (%d)\n", typeToString(mType), mType);
+    fdprintf(fd, "Width: %u Height: %u\n", mWidth, mHeight);
+    fdprintf(fd, "Stream Format: %s (%d)", formatToString(mFormat), mFormat);
+    // ToDo: prettyprint usage mask flags
+    fdprintf(fd, "Gralloc Usage Mask: 0x%x\n", mUsage);
+    fdprintf(fd, "Max Buffer Count: %d\n", mMaxBuffers);
+    fdprintf(fd, "Buffers Registered: %s\n", mRegistered ? "true" : "false");
+    fdprintf(fd, "Number of Buffers: %d\n", mNumBuffers);
+    for (int i = 0; i < mNumBuffers; i++) {
+        fdprintf(fd, "Buffer %d/%d: %p\n", i, mNumBuffers, mBuffers[i]);
+    }
+
+    pthread_mutex_unlock(&mMutex);
+}
+
 } // namespace default_camera_hal
diff --git a/modules/camera/Stream.h b/modules/camera/Stream.h
index 34abd95..b62114e 100644
--- a/modules/camera/Stream.h
+++ b/modules/camera/Stream.h
@@ -41,6 +41,9 @@
         bool isInputType();
         bool isOutputType();
         bool isRegistered();
+        const char* typeToString(int type);
+        const char* formatToString(int format);
+        void dump(int fd);
 
         // This stream is being reused. Used in stream configuration passes
         bool mReuse;
diff --git a/modules/camera/VendorTags.cpp b/modules/camera/VendorTags.cpp
new file mode 100644
index 0000000..58bd606
--- /dev/null
+++ b/modules/camera/VendorTags.cpp
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2013 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 <system/camera_metadata.h>
+#include "Metadata.h"
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "VendorTags"
+#include <cutils/log.h>
+
+#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
+#include <utils/Trace.h>
+
+#include "VendorTags.h"
+
+namespace default_camera_hal {
+
+// Internal representations of vendor tags for convenience.
+// Other classes must access this data via public interfaces.
+// Structured to be easy to extend and contain complexity.
+namespace {
+// Describes a single vendor tag entry
+struct Entry {
+    const char* name;
+    uint8_t     type;
+};
+// Describes a vendor tag section
+struct Section {
+    const char* name;
+    uint32_t start;
+    uint32_t end;
+    const Entry* tags;
+};
+
+// Entry arrays for each section
+const Entry DemoWizardry[DEMO_WIZARDRY_END - DEMO_WIZARDRY_START] = {
+    [DEMO_WIZARDRY_DIMENSION_SIZE - DEMO_WIZARDRY_START] =
+        {"dimensionSize",   TYPE_INT32},
+    [DEMO_WIZARDRY_DIMENSIONS - DEMO_WIZARDRY_START] =
+        {"dimensions",      TYPE_INT32},
+    [DEMO_WIZARDRY_FAMILIAR - DEMO_WIZARDRY_START] =
+        {"familiar",        TYPE_BYTE},
+    [DEMO_WIZARDRY_FIRE - DEMO_WIZARDRY_START] =
+        {"fire",            TYPE_RATIONAL}
+};
+
+const Entry DemoSorcery[DEMO_SORCERY_END - DEMO_SORCERY_START] = {
+    [DEMO_SORCERY_DIFFICULTY - DEMO_SORCERY_START] =
+        {"difficulty",      TYPE_INT64},
+    [DEMO_SORCERY_LIGHT - DEMO_SORCERY_START] =
+        {"light",           TYPE_BYTE}
+};
+
+const Entry DemoMagic[DEMO_MAGIC_END - DEMO_MAGIC_START] = {
+    [DEMO_MAGIC_CARD_TRICK - DEMO_MAGIC_START] =
+        {"cardTrick",       TYPE_DOUBLE},
+    [DEMO_MAGIC_LEVITATION - DEMO_MAGIC_START] =
+        {"levitation",      TYPE_FLOAT}
+};
+
+// Array of all sections
+const Section DemoSections[DEMO_SECTION_COUNT] = {
+    [DEMO_WIZARDRY] = { "demo.wizardry",
+                        DEMO_WIZARDRY_START,
+                        DEMO_WIZARDRY_END,
+                        DemoWizardry },
+    [DEMO_SORCERY]  = { "demo.sorcery",
+                        DEMO_SORCERY_START,
+                        DEMO_SORCERY_END,
+                        DemoSorcery },
+    [DEMO_MAGIC]    = { "demo.magic",
+                        DEMO_MAGIC_START,
+                        DEMO_MAGIC_END,
+                        DemoMagic }
+};
+
+// Get a static handle to a specific vendor tag section
+const Section* getSection(uint32_t tag)
+{
+    uint32_t section = (tag - VENDOR_SECTION_START) >> 16;
+
+    if (tag < VENDOR_SECTION_START) {
+        ALOGE("%s: Tag 0x%x before vendor section", __func__, tag);
+        return NULL;
+    }
+
+    if (section >= DEMO_SECTION_COUNT) {
+        ALOGE("%s: Tag 0x%x after vendor section", __func__, tag);
+        return NULL;
+    }
+
+    return &DemoSections[section];
+}
+
+// Get a static handle to a specific vendor tag entry
+const Entry* getEntry(uint32_t tag)
+{
+    const Section* section = getSection(tag);
+    int index;
+
+    if (section == NULL)
+        return NULL;
+
+    if (tag >= section->end) {
+        ALOGE("%s: Tag 0x%x outside section", __func__, tag);
+        return NULL;
+    }
+
+    index = tag - section->start;
+    return &section->tags[index];
+}
+} // namespace
+
+VendorTags::VendorTags()
+  : mTagCount(0)
+{
+    for (int i = 0; i < DEMO_SECTION_COUNT; i++) {
+        mTagCount += DemoSections[i].end - DemoSections[i].start;
+    }
+}
+
+VendorTags::~VendorTags()
+{
+}
+
+int VendorTags::getTagCount(const vendor_tag_ops_t* ops)
+{
+    return mTagCount;
+}
+
+void VendorTags::getAllTags(const vendor_tag_ops_t* ops, uint32_t* tag_array)
+{
+    if (tag_array == NULL) {
+        ALOGE("%s: NULL tag_array", __func__);
+        return;
+    }
+
+    for (int i = 0; i < DEMO_SECTION_COUNT; i++) {
+        for (uint32_t tag = DemoSections[i].start;
+                tag < DemoSections[i].end; tag++) {
+            *tag_array++ = tag;
+        }
+    }
+}
+
+const char* VendorTags::getSectionName(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Section* section = getSection(tag);
+
+    if (section == NULL)
+        return NULL;
+
+    return section->name;
+}
+
+const char* VendorTags::getTagName(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Entry* entry = getEntry(tag);
+
+    if (entry == NULL)
+        return NULL;
+
+    return entry->name;
+}
+
+int VendorTags::getTagType(const vendor_tag_ops_t* ops, uint32_t tag)
+{
+    const Entry* entry = getEntry(tag);
+
+    if (entry == NULL)
+        return -1;
+
+    return entry->type;
+}
+} // namespace default_camera_hal
diff --git a/modules/camera/VendorTags.h b/modules/camera/VendorTags.h
new file mode 100644
index 0000000..9af9f7d
--- /dev/null
+++ b/modules/camera/VendorTags.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013 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 VENDOR_TAGS_H_
+#define VENDOR_TAGS_H_
+
+#include <hardware/camera_common.h>
+#include <system/camera_metadata.h>
+
+namespace default_camera_hal {
+
+// VendorTags contains all vendor-specific metadata tag functionality
+class VendorTags {
+    public:
+        VendorTags();
+        ~VendorTags();
+
+        // Vendor Tags Operations (see <hardware/camera_common.h>)
+        int getTagCount(const vendor_tag_ops_t* ops);
+        void getAllTags(const vendor_tag_ops_t* ops, uint32_t* tag_array);
+        const char* getSectionName(const vendor_tag_ops_t* ops, uint32_t tag);
+        const char* getTagName(const vendor_tag_ops_t* ops, uint32_t tag);
+        int getTagType(const vendor_tag_ops_t* ops, uint32_t tag);
+
+    private:
+        // Total number of vendor tags
+        int mTagCount;
+};
+
+// Tag sections start at the beginning of vendor tags (0x8000_0000)
+// See <system/camera_metadata.h>
+enum {
+    DEMO_WIZARDRY,
+    DEMO_SORCERY,
+    DEMO_MAGIC,
+    DEMO_SECTION_COUNT
+};
+
+// Each section starts at increments of 0x1_0000
+enum {
+    DEMO_WIZARDRY_START = (DEMO_WIZARDRY + VENDOR_SECTION) << 16,
+    DEMO_SORCERY_START  = (DEMO_SORCERY  + VENDOR_SECTION) << 16,
+    DEMO_MAGIC_START    = (DEMO_MAGIC    + VENDOR_SECTION) << 16,
+};
+
+// Vendor Tag values, start value begins each section
+enum {
+    DEMO_WIZARDRY_DIMENSION_SIZE = DEMO_WIZARDRY_START,
+    DEMO_WIZARDRY_DIMENSIONS,
+    DEMO_WIZARDRY_FAMILIAR,
+    DEMO_WIZARDRY_FIRE,
+    DEMO_WIZARDRY_END,
+
+    DEMO_SORCERY_DIFFICULTY = DEMO_SORCERY_START,
+    DEMO_SORCERY_LIGHT,
+    DEMO_SORCERY_END,
+
+    DEMO_MAGIC_CARD_TRICK = DEMO_MAGIC_START,
+    DEMO_MAGIC_LEVITATION,
+    DEMO_MAGIC_END,
+};
+} // namespace default_camera_hal
+
+#endif // VENDOR_TAGS_H_