diff --git a/media/codec2/vndk/C2AllocatorBlob.cpp b/media/codec2/vndk/C2AllocatorBlob.cpp
index 565137c..6340cba 100644
--- a/media/codec2/vndk/C2AllocatorBlob.cpp
+++ b/media/codec2/vndk/C2AllocatorBlob.cpp
@@ -17,6 +17,8 @@
 // #define LOG_NDEBUG 0
 #define LOG_TAG "C2AllocatorBlob"
 
+#include <set>
+
 #include <C2AllocatorBlob.h>
 #include <C2PlatformSupport.h>
 
@@ -67,6 +69,10 @@
 private:
     const std::shared_ptr<C2GraphicAllocation> mGraphicAllocation;
     const C2Allocator::id_t mAllocatorId;
+
+    std::mutex mMapLock;
+    std::multiset<std::pair<size_t, size_t>> mMappedOffsetSize;
+    uint8_t *mMappedAddr;
 };
 
 C2AllocationBlob::C2AllocationBlob(
@@ -74,20 +80,74 @@
         C2Allocator::id_t allocatorId)
       : C2LinearAllocation(capacity),
         mGraphicAllocation(std::move(graphicAllocation)),
-        mAllocatorId(allocatorId) {}
+        mAllocatorId(allocatorId),
+        mMappedAddr(nullptr) {}
 
-C2AllocationBlob::~C2AllocationBlob() {}
+C2AllocationBlob::~C2AllocationBlob() {
+    if (mMappedAddr) {
+        C2Rect rect(capacity(), kLinearBufferHeight);
+        mGraphicAllocation->unmap(&mMappedAddr, rect, nullptr);
+    }
+}
 
 c2_status_t C2AllocationBlob::map(size_t offset, size_t size, C2MemoryUsage usage,
                                   C2Fence* fence, void** addr /* nonnull */) {
+    *addr = nullptr;
+    if (size > capacity() || offset > capacity() || offset > capacity() - size) {
+        ALOGV("C2AllocationBlob: map: bad offset / size: offset=%zu size=%zu capacity=%u",
+                offset, size, capacity());
+        return C2_BAD_VALUE;
+    }
+    std::unique_lock<std::mutex> lock(mMapLock);
+    if (mMappedAddr) {
+        *addr = mMappedAddr + offset;
+        mMappedOffsetSize.insert({offset, size});
+        ALOGV("C2AllocationBlob: mapped from existing mapping: offset=%zu size=%zu capacity=%u",
+                offset, size, capacity());
+        return C2_OK;
+    }
     C2PlanarLayout layout;
-    C2Rect rect = C2Rect(size, kLinearBufferHeight).at(offset, 0u);
-    return mGraphicAllocation->map(rect, usage, fence, &layout, reinterpret_cast<uint8_t**>(addr));
+    C2Rect rect = C2Rect(capacity(), kLinearBufferHeight);
+    c2_status_t err = mGraphicAllocation->map(rect, usage, fence, &layout, &mMappedAddr);
+    if (err != C2_OK) {
+        ALOGV("C2AllocationBlob: map failed: offset=%zu size=%zu capacity=%u err=%d",
+                offset, size, capacity(), err);
+        mMappedAddr = nullptr;
+        return err;
+    }
+    *addr = mMappedAddr + offset;
+    mMappedOffsetSize.insert({offset, size});
+    ALOGV("C2AllocationBlob: new map succeeded: offset=%zu size=%zu capacity=%u",
+            offset, size, capacity());
+    return C2_OK;
 }
 
 c2_status_t C2AllocationBlob::unmap(void* addr, size_t size, C2Fence* fenceFd) {
-    C2Rect rect(size, kLinearBufferHeight);
-    return mGraphicAllocation->unmap(reinterpret_cast<uint8_t**>(&addr), rect, fenceFd);
+    std::unique_lock<std::mutex> lock(mMapLock);
+    uint8_t *u8Addr = static_cast<uint8_t *>(addr);
+    if (u8Addr < mMappedAddr || mMappedAddr + capacity() < u8Addr + size) {
+        ALOGV("C2AllocationBlob: unmap: Bad addr / size: addr=%p size=%zu capacity=%u",
+                addr, size, capacity());
+        return C2_BAD_VALUE;
+    }
+    auto it = mMappedOffsetSize.find(std::make_pair(u8Addr - mMappedAddr, size));
+    if (it == mMappedOffsetSize.end()) {
+        ALOGV("C2AllocationBlob: unrecognized map: addr=%p size=%zu capacity=%u",
+                addr, size, capacity());
+        return C2_BAD_VALUE;
+    }
+    mMappedOffsetSize.erase(it);
+    if (!mMappedOffsetSize.empty()) {
+        ALOGV("C2AllocationBlob: still maintain mapping: addr=%p size=%zu capacity=%u",
+                addr, size, capacity());
+        return C2_OK;
+    }
+    C2Rect rect(capacity(), kLinearBufferHeight);
+    c2_status_t err = mGraphicAllocation->unmap(&mMappedAddr, rect, fenceFd);
+    ALOGV("C2AllocationBlob: last unmap: addr=%p size=%zu capacity=%u err=%d",
+            addr, size, capacity(), err);
+    mMappedAddr = nullptr;
+    return err;
 }
 
 /* ====================================== BLOB ALLOCATOR ====================================== */
diff --git a/media/libaaudio/src/utility/AAudioUtilities.cpp b/media/libaaudio/src/utility/AAudioUtilities.cpp
index dbb3d2b..3dfb801 100644
--- a/media/libaaudio/src/utility/AAudioUtilities.cpp
+++ b/media/libaaudio/src/utility/AAudioUtilities.cpp
@@ -27,7 +27,7 @@
 #include "core/AudioGlobal.h"
 #include <aaudio/AAudioTesting.h>
 #include <math.h>
-#include <system/audio-base.h>
+#include <system/audio.h>
 #include <assert.h>
 
 #include "utility/AAudioUtilities.h"
diff --git a/media/libeffects/config/src/EffectsConfig.cpp b/media/libeffects/config/src/EffectsConfig.cpp
index 26eaaf8..1696233 100644
--- a/media/libeffects/config/src/EffectsConfig.cpp
+++ b/media/libeffects/config/src/EffectsConfig.cpp
@@ -138,7 +138,7 @@
 
 template <>
 bool stringToStreamType(const char *streamName, audio_devices_t* type) {
-    return deviceFromString(streamName, *type);
+    return DeviceConverter::fromString(streamName, *type);
 }
 
 /** Parse a library xml note and push the result in libraries or return false on failure. */
diff --git a/media/libmediahelper/TEST_MAPPING b/media/libmediahelper/TEST_MAPPING
new file mode 100644
index 0000000..f9594bd
--- /dev/null
+++ b/media/libmediahelper/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "libmedia_helper_tests"
+    }
+  ]
+}
diff --git a/media/libmediahelper/TypeConverter.cpp b/media/libmediahelper/TypeConverter.cpp
index 876dc45..d3a517f 100644
--- a/media/libmediahelper/TypeConverter.cpp
+++ b/media/libmediahelper/TypeConverter.cpp
@@ -18,315 +18,9 @@
 
 namespace android {
 
-#define MAKE_STRING_FROM_ENUM(string) { #string, string }
+#define MAKE_STRING_FROM_ENUM(enumval) { #enumval, enumval }
 #define TERMINATOR { .literal = nullptr }
 
-template <>
-const OutputDeviceConverter::Table OutputDeviceConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_NONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_SPEAKER_SAFE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
-    // TODO(mnaganov): Remove from here, use 'audio_is_bluetooth_out_sco_device' function.
-    { "AUDIO_DEVICE_OUT_ALL_SCO", static_cast<audio_devices_t>(AUDIO_DEVICE_OUT_ALL_SCO) },
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
-    // TODO(mnaganov): Remove from here, use 'audio_is_a2dp_out_device' function.
-    { "AUDIO_DEVICE_OUT_ALL_A2DP", static_cast<audio_devices_t>(AUDIO_DEVICE_OUT_ALL_A2DP) },
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_HDMI),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
-    // TODO(mnaganov): Remove from here, use 'audio_is_usb_out_device' function.
-    { "AUDIO_DEVICE_OUT_ALL_USB", static_cast<audio_devices_t>(AUDIO_DEVICE_OUT_ALL_USB) },
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_LINE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_SPDIF),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_FM),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_AUX_LINE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_IP),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BUS),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_PROXY),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_USB_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_HEARING_AID),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_ECHO_CANCELLER),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLE_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_BLE_SPEAKER),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_DEFAULT),
-    // STUB must be after DEFAULT, so the latter is picked up by toString first.
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_OUT_STUB),
-    TERMINATOR
-};
-
-template <>
-const InputDeviceConverter::Table InputDeviceConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_NONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_COMMUNICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_AMBIENT),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
-    // TODO(mnaganov): Remove from here, use 'audio_is_bluetooth_in_sco_device' function.
-    { "AUDIO_DEVICE_IN_ALL_SCO", static_cast<audio_devices_t>(AUDIO_DEVICE_IN_ALL_SCO) },
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_HDMI),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_HDMI_ARC),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
-    // TODO(mnaganov): Remove from here, use 'audio_is_usb_in_device' function.
-    { "AUDIO_DEVICE_IN_ALL_USB", static_cast<audio_devices_t>(AUDIO_DEVICE_IN_ALL_USB) },
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_LINE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_SPDIF),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_IP),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BUS),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_PROXY),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_USB_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_BLE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_ECHO_REFERENCE),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_BLE_HEADSET),
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_DEFAULT),
-    // STUB must be after DEFAULT, so the latter is picked up by toString first.
-    MAKE_STRING_FROM_ENUM(AUDIO_DEVICE_IN_STUB),
-    TERMINATOR
-};
-
-
-template <>
-const OutputFlagConverter::Table OutputFlagConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_NONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_FAST),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_HW_AV_SYNC),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_TTS),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_RAW),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_SYNC),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_DIRECT_PCM),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_MMAP_NOIRQ),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_VOIP_RX),
-    MAKE_STRING_FROM_ENUM(AUDIO_OUTPUT_FLAG_INCALL_MUSIC),
-    TERMINATOR
-};
-
-
-template <>
-const InputFlagConverter::Table InputFlagConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_NONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_FAST),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_HW_HOTWORD),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_RAW),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_SYNC),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_MMAP_NOIRQ),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_VOIP_TX),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_HW_AV_SYNC),
-    MAKE_STRING_FROM_ENUM(AUDIO_INPUT_FLAG_DIRECT),
-    TERMINATOR
-};
-
-
-template <>
-const FormatConverter::Table FormatConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_16_BIT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_8_BIT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_32_BIT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_FLOAT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MP3),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AMR_NB),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AMR_WB),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_MAIN),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_SSR),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LTP),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_HE_V1),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ERLC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_HE_V2),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ELD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_XHE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_MAIN),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_LC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_SSR),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_LTP),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_HE_V1),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_SCALABLE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_ERLC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_LD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_HE_V2),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_ELD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS_XHE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_VORBIS),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_HE_AAC_V1),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_HE_AAC_V2),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_OPUS),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AC3),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_E_AC3),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_DTS),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_DTS_HD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_IEC61937),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_DOLBY_TRUEHD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_EVRC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_EVRCB),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_EVRCWB),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_EVRCNW),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADIF),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_WMA),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_WMA_PRO),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AMR_WB_PLUS),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MP2),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_QCELP),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_DSD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_FLAC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_ALAC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_APE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_ADTS),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_SBC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_APTX),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_APTX_HD),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AC4),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_LDAC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MAT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_E_AC3_JOC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MAT_1_0),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MAT_2_0),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_MAT_2_1),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LATM),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LATM_LC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LATM_HE_V1),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_AAC_LATM_HE_V2),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_CELT),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_APTX_ADAPTIVE),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_LHDC),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_LHDC_LL),
-    MAKE_STRING_FROM_ENUM(AUDIO_FORMAT_APTX_TWSP),
-    TERMINATOR
-};
-
-
-template <>
-const OutputChannelConverter::Table OutputChannelConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_MONO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_STEREO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_2POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_2POINT0POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_2POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_TRI),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_TRI_BACK),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_3POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_3POINT0POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_3POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_QUAD),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_QUAD_BACK),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_QUAD_SIDE),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_SURROUND),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_PENTA),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_5POINT1_BACK),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_5POINT1_SIDE),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_5POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_5POINT1POINT4),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_6POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_7POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_7POINT1POINT4),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_HAPTIC_A),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_MONO_HAPTIC_A),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_STEREO_HAPTIC_A),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_HAPTIC_AB),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_MONO_HAPTIC_AB),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_OUT_STEREO_HAPTIC_AB),
-    TERMINATOR
-};
-
-
-template <>
-const InputChannelConverter::Table InputChannelConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_MONO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_STEREO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_6),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_2POINT0POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_2POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_3POINT0POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_3POINT1POINT2),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_5POINT1),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_VOICE_UPLINK_MONO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_VOICE_DNLINK_MONO),
-    MAKE_STRING_FROM_ENUM(AUDIO_CHANNEL_IN_VOICE_CALL_MONO),
-    TERMINATOR
-};
-
-template <>
-const ChannelIndexConverter::Table ChannelIndexConverter::mTable[] = {
-    {"AUDIO_CHANNEL_INDEX_MASK_1", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_1)},
-    {"AUDIO_CHANNEL_INDEX_MASK_2", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_2)},
-    {"AUDIO_CHANNEL_INDEX_MASK_3", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_3)},
-    {"AUDIO_CHANNEL_INDEX_MASK_4", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_4)},
-    {"AUDIO_CHANNEL_INDEX_MASK_5", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_5)},
-    {"AUDIO_CHANNEL_INDEX_MASK_6", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_6)},
-    {"AUDIO_CHANNEL_INDEX_MASK_7", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_7)},
-    {"AUDIO_CHANNEL_INDEX_MASK_8", static_cast<audio_channel_mask_t>(AUDIO_CHANNEL_INDEX_MASK_8)},
-    TERMINATOR
-};
-
-
-template <>
-const GainModeConverter::Table GainModeConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_GAIN_MODE_JOINT),
-    MAKE_STRING_FROM_ENUM(AUDIO_GAIN_MODE_CHANNELS),
-    MAKE_STRING_FROM_ENUM(AUDIO_GAIN_MODE_RAMP),
-    TERMINATOR
-};
-
-
-template <>
-const StreamTypeConverter::Table StreamTypeConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_DEFAULT),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_VOICE_CALL),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_SYSTEM),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_RING),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_MUSIC),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_ALARM),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_NOTIFICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_BLUETOOTH_SCO ),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_ENFORCED_AUDIBLE),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_DTMF),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_TTS),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_ACCESSIBILITY),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_ASSISTANT),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_REROUTING),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_PATCH),
-    MAKE_STRING_FROM_ENUM(AUDIO_STREAM_CALL_ASSISTANT),
-    TERMINATOR
-};
-
 template<>
 const AudioModeConverter::Table AudioModeConverter::mTable[] = {
     MAKE_STRING_FROM_ENUM(AUDIO_MODE_INVALID),
@@ -339,62 +33,6 @@
     TERMINATOR
 };
 
-template<>
-const AudioContentTypeConverter::Table AudioContentTypeConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_CONTENT_TYPE_UNKNOWN),
-    MAKE_STRING_FROM_ENUM(AUDIO_CONTENT_TYPE_SPEECH),
-    MAKE_STRING_FROM_ENUM(AUDIO_CONTENT_TYPE_MUSIC),
-    MAKE_STRING_FROM_ENUM(AUDIO_CONTENT_TYPE_MOVIE),
-    MAKE_STRING_FROM_ENUM(AUDIO_CONTENT_TYPE_SONIFICATION),
-    TERMINATOR
-};
-
-template <>
-const UsageTypeConverter::Table UsageTypeConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_UNKNOWN),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_MEDIA),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_VOICE_COMMUNICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ALARM),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_NOTIFICATION_EVENT),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ASSISTANCE_SONIFICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_GAME),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_VIRTUAL_SOURCE),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ASSISTANT),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_CALL_ASSISTANT),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_EMERGENCY),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_SAFETY),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_VEHICLE_STATUS),
-    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ANNOUNCEMENT),
-    TERMINATOR
-};
-
-template <>
-const SourceTypeConverter::Table SourceTypeConverter::mTable[] = {
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_DEFAULT),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_MIC),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_UPLINK),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_DOWNLINK),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_CALL),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_CAMCORDER),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_RECOGNITION),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_COMMUNICATION),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_REMOTE_SUBMIX),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_UNPROCESSED),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_VOICE_PERFORMANCE),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_ECHO_REFERENCE),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_FM_TUNER),
-    MAKE_STRING_FROM_ENUM(AUDIO_SOURCE_HOTWORD),
-    TERMINATOR
-};
-
 template <>
 const AudioFlagConverter::Table AudioFlagConverter::mTable[] = {
     MAKE_STRING_FROM_ENUM(AUDIO_FLAG_NONE),
@@ -417,6 +55,7 @@
 
 template class TypeConverter<OutputDeviceTraits>;
 template class TypeConverter<InputDeviceTraits>;
+template class TypeConverter<DeviceTraits>;
 template class TypeConverter<OutputFlagTraits>;
 template class TypeConverter<InputFlagTraits>;
 template class TypeConverter<FormatTraits>;
@@ -430,11 +69,6 @@
 template class TypeConverter<SourceTraits>;
 template class TypeConverter<AudioFlagTraits>;
 
-bool deviceFromString(const std::string& literalDevice, audio_devices_t& device) {
-    return InputDeviceConverter::fromString(literalDevice, device) ||
-            OutputDeviceConverter::fromString(literalDevice, device);
-}
-
 SampleRateTraits::Collection samplingRatesFromString(
         const std::string &samplingRates, const char *del)
 {
@@ -454,21 +88,20 @@
 audio_format_t formatFromString(const std::string &literalFormat, audio_format_t defaultFormat)
 {
     audio_format_t format;
-    if (literalFormat.empty()) {
-        return defaultFormat;
+    if (!literalFormat.empty() && FormatConverter::fromString(literalFormat, format)) {
+        return format;
     }
-    FormatConverter::fromString(literalFormat, format);
-    return format;
+    return defaultFormat;
 }
 
 audio_channel_mask_t channelMaskFromString(const std::string &literalChannels)
 {
     audio_channel_mask_t channels;
-    if (!OutputChannelConverter::fromString(literalChannels, channels) &&
-            !InputChannelConverter::fromString(literalChannels, channels)) {
-        return AUDIO_CHANNEL_INVALID;
+    if (!literalChannels.empty() &&
+            audio_channel_mask_from_string(literalChannels.c_str(), &channels)) {
+        return channels;
     }
-    return channels;
+    return AUDIO_CHANNEL_INVALID;
 }
 
 ChannelTraits::Collection channelMasksFromString(
diff --git a/media/libmediahelper/include/media/TypeConverter.h b/media/libmediahelper/include/media/TypeConverter.h
index 011498a..42ccb5f 100644
--- a/media/libmediahelper/include/media/TypeConverter.h
+++ b/media/libmediahelper/include/media/TypeConverter.h
@@ -24,8 +24,6 @@
 
 #include <system/audio.h>
 #include <utils/Log.h>
-#include <utils/Vector.h>
-#include <utils/SortedVector.h>
 
 #include <media/AudioParameter.h>
 #include "convert.h"
@@ -43,16 +41,6 @@
     }
 };
 template <typename T>
-struct SortedVectorTraits
-{
-    typedef T Type;
-    typedef SortedVector<Type> Collection;
-    static void add(Collection &collection, Type value)
-    {
-        collection.add(value);
-    }
-};
-template <typename T>
 struct SetTraits
 {
     typedef T Type;
@@ -108,13 +96,20 @@
                                      typename Traits::Collection &collection,
                                      const char *del = AudioParameter::valueListSeparator);
 
-    static uint32_t maskFromString(
+    static typename Traits::Type maskFromString(
             const std::string &str, const char *del = AudioParameter::valueListSeparator);
 
     static void maskToString(
-            uint32_t mask, std::string &str, const char *del = AudioParameter::valueListSeparator);
+            typename Traits::Type mask, std::string &str,
+            const char *del = AudioParameter::valueListSeparator);
 
 protected:
+    // Default implementations use mTable for to/from string conversions
+    // of each individual enum value.
+    // These functions may be specialized to use external converters instead.
+    static bool toStringImpl(const typename Traits::Type &value, std::string &str);
+    static bool fromStringImpl(const std::string &str, typename Traits::Type &result);
+
     struct Table {
         const char *literal;
         typename Traits::Type value;
@@ -124,26 +119,22 @@
 };
 
 template <class Traits>
-inline bool TypeConverter<Traits>::toString(const typename Traits::Type &value, std::string &str)
-{
+inline bool TypeConverter<Traits>::toStringImpl(
+        const typename Traits::Type &value, std::string &str) {
     for (size_t i = 0; mTable[i].literal; i++) {
         if (mTable[i].value == value) {
             str = mTable[i].literal;
             return true;
         }
     }
-    char result[64];
-    snprintf(result, sizeof(result), "Unknown enum value %d", value);
-    str = result;
     return false;
 }
 
 template <class Traits>
-inline bool TypeConverter<Traits>::fromString(const std::string &str, typename Traits::Type &result)
-{
+inline bool TypeConverter<Traits>::fromStringImpl(
+        const std::string &str, typename Traits::Type &result) {
     for (size_t i = 0; mTable[i].literal; i++) {
         if (strcmp(mTable[i].literal, str.c_str()) == 0) {
-            ALOGV("stringToEnum() found %s", mTable[i].literal);
             result = mTable[i].value;
             return true;
         }
@@ -152,6 +143,26 @@
 }
 
 template <class Traits>
+inline bool TypeConverter<Traits>::toString(const typename Traits::Type &value, std::string &str)
+{
+    const bool success = toStringImpl(value, str);
+    if (!success) {
+        char result[64];
+        snprintf(result, sizeof(result), "Unknown enum value %d", value);
+        str = result;
+    }
+    return success;
+}
+
+template <class Traits>
+inline bool TypeConverter<Traits>::fromString(const std::string &str, typename Traits::Type &result)
+{
+    const bool success = fromStringImpl(str, result);
+    ALOGV_IF(success, "stringToEnum() found %s", str.c_str());
+    return success;
+}
+
+template <class Traits>
 inline void TypeConverter<Traits>::collectionFromString(const std::string &str,
         typename Traits::Collection &collection,
         const char *del)
@@ -168,7 +179,8 @@
 }
 
 template <class Traits>
-inline uint32_t TypeConverter<Traits>::maskFromString(const std::string &str, const char *del)
+inline typename Traits::Type TypeConverter<Traits>::maskFromString(
+        const std::string &str, const char *del)
 {
     char *literal = strdup(str.c_str());
     uint32_t value = 0;
@@ -179,20 +191,24 @@
         }
     }
     free(literal);
-    return value;
+    return static_cast<typename Traits::Type>(value);
 }
 
 template <class Traits>
-inline void TypeConverter<Traits>::maskToString(uint32_t mask, std::string &str, const char *del)
+inline void TypeConverter<Traits>::maskToString(
+        typename Traits::Type mask, std::string &str, const char *del)
 {
     if (mask != 0) {
         bool first_flag = true;
-        for (size_t i = 0; mTable[i].literal; i++) {
-            uint32_t value = static_cast<uint32_t>(mTable[i].value);
-            if (mTable[i].value != 0 && ((mask & value) == value)) {
-                if (!first_flag) str += del;
-                first_flag = false;
-                str += mTable[i].literal;
+        for (size_t bit = 0; bit < sizeof(uint32_t) * 8; ++bit) {
+            uint32_t flag = 1u << bit;
+            if ((flag & mask) == flag) {
+                std::string flag_str;
+                if (toString(static_cast<typename Traits::Type>(flag), flag_str)) {
+                    if (!first_flag) str += del;
+                    first_flag = false;
+                    str += flag_str;
+                }
             }
         }
     } else {
@@ -200,6 +216,7 @@
     }
 }
 
+typedef TypeConverter<DeviceTraits> DeviceConverter;
 typedef TypeConverter<OutputDeviceTraits> OutputDeviceConverter;
 typedef TypeConverter<InputDeviceTraits> InputDeviceConverter;
 typedef TypeConverter<OutputFlagTraits> OutputFlagConverter;
@@ -216,23 +233,227 @@
 typedef TypeConverter<SourceTraits> SourceTypeConverter;
 typedef TypeConverter<AudioFlagTraits> AudioFlagConverter;
 
-template<> const OutputDeviceConverter::Table OutputDeviceConverter::mTable[];
-template<> const InputDeviceConverter::Table InputDeviceConverter::mTable[];
-template<> const OutputFlagConverter::Table OutputFlagConverter::mTable[];
-template<> const InputFlagConverter::Table InputFlagConverter::mTable[];
-template<> const FormatConverter::Table FormatConverter::mTable[];
-template<> const OutputChannelConverter::Table OutputChannelConverter::mTable[];
-template<> const InputChannelConverter::Table InputChannelConverter::mTable[];
-template<> const ChannelIndexConverter::Table ChannelIndexConverter::mTable[];
-template<> const GainModeConverter::Table GainModeConverter::mTable[];
-template<> const StreamTypeConverter::Table StreamTypeConverter::mTable[];
 template<> const AudioModeConverter::Table AudioModeConverter::mTable[];
-template<> const AudioContentTypeConverter::Table AudioContentTypeConverter::mTable[];
-template<> const UsageTypeConverter::Table UsageTypeConverter::mTable[];
-template<> const SourceTypeConverter::Table SourceTypeConverter::mTable[];
 template<> const AudioFlagConverter::Table AudioFlagConverter::mTable[];
 
-bool deviceFromString(const std::string& literalDevice, audio_devices_t& device);
+template <>
+inline bool TypeConverter<DeviceTraits>::toStringImpl(
+        const DeviceTraits::Type &value, std::string &str) {
+    str = audio_device_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<DeviceTraits>::fromStringImpl(
+        const std::string &str, DeviceTraits::Type &result) {
+    return audio_device_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<OutputDeviceTraits>::toStringImpl(
+        const OutputDeviceTraits::Type &value, std::string &str) {
+    if (audio_is_output_device(value)) {
+        str = audio_device_to_string(value);
+        return !str.empty();
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<OutputDeviceTraits>::fromStringImpl(
+        const std::string &str, OutputDeviceTraits::Type &result) {
+    OutputDeviceTraits::Type temp;
+    if (audio_device_from_string(str.c_str(), &temp) &&
+            audio_is_output_device(temp)) {
+        result = temp;
+        return true;
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<InputDeviceTraits>::toStringImpl(
+        const InputDeviceTraits::Type &value, std::string &str) {
+    if (audio_is_input_device(value)) {
+        str = audio_device_to_string(value);
+        return !str.empty();
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<InputDeviceTraits>::fromStringImpl(
+        const std::string &str, InputDeviceTraits::Type &result) {
+    InputDeviceTraits::Type temp;
+    if (audio_device_from_string(str.c_str(), &temp) &&
+            audio_is_input_device(temp)) {
+        result = temp;
+        return true;
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<InputFlagTraits>::toStringImpl(
+        const audio_input_flags_t &value, std::string &str) {
+    str = audio_input_flag_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<InputFlagTraits>::fromStringImpl(
+        const std::string &str, audio_input_flags_t &result) {
+    return audio_input_flag_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<OutputFlagTraits>::toStringImpl(
+        const audio_output_flags_t &value, std::string &str) {
+    str = audio_output_flag_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<OutputFlagTraits>::fromStringImpl(
+        const std::string &str, audio_output_flags_t &result) {
+    return audio_output_flag_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<FormatTraits>::toStringImpl(
+        const audio_format_t &value, std::string &str) {
+    str = audio_format_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<FormatTraits>::fromStringImpl(
+        const std::string &str, audio_format_t &result) {
+    return audio_format_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<OutputChannelTraits>::toStringImpl(
+        const audio_channel_mask_t &value, std::string &str) {
+    str = audio_channel_out_mask_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<OutputChannelTraits>::fromStringImpl(
+        const std::string &str, audio_channel_mask_t &result) {
+    OutputChannelTraits::Type temp;
+    if (audio_channel_mask_from_string(str.c_str(), &temp) &&
+            audio_is_output_channel(temp)) {
+        result = temp;
+        return true;
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<InputChannelTraits>::toStringImpl(
+        const audio_channel_mask_t &value, std::string &str) {
+    str = audio_channel_in_mask_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<InputChannelTraits>::fromStringImpl(
+        const std::string &str, audio_channel_mask_t &result) {
+    InputChannelTraits::Type temp;
+    if (audio_channel_mask_from_string(str.c_str(), &temp) &&
+            audio_is_input_channel(temp)) {
+        result = temp;
+        return true;
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<ChannelIndexTraits>::toStringImpl(
+        const audio_channel_mask_t &value, std::string &str) {
+    str = audio_channel_index_mask_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<ChannelIndexTraits>::fromStringImpl(
+        const std::string &str, audio_channel_mask_t &result) {
+    ChannelIndexTraits::Type temp;
+    if (audio_channel_mask_from_string(str.c_str(), &temp) &&
+            audio_channel_mask_get_representation(temp) == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
+        result = temp;
+        return true;
+    }
+    return false;
+}
+
+template <>
+inline bool TypeConverter<StreamTraits>::toStringImpl(
+        const audio_stream_type_t &value, std::string &str) {
+    str = audio_stream_type_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<StreamTraits>::fromStringImpl(
+        const std::string &str, audio_stream_type_t &result)
+{
+    return audio_stream_type_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<GainModeTraits>::toStringImpl(
+        const audio_gain_mode_t &value, std::string &str) {
+    str = audio_gain_mode_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<GainModeTraits>::fromStringImpl(
+        const std::string &str, audio_gain_mode_t &result) {
+    return audio_gain_mode_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<AudioContentTraits>::toStringImpl(
+        const audio_content_type_t &value, std::string &str) {
+    str = audio_content_type_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<AudioContentTraits>::fromStringImpl(
+        const std::string &str, audio_content_type_t &result) {
+    return audio_content_type_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<UsageTraits>::toStringImpl(const audio_usage_t &value, std::string &str)
+{
+    str = audio_usage_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<UsageTraits>::fromStringImpl(
+        const std::string &str, audio_usage_t &result) {
+    return audio_usage_from_string(str.c_str(), &result);
+}
+
+template <>
+inline bool TypeConverter<SourceTraits>::toStringImpl(const audio_source_t &value, std::string &str)
+{
+    str = audio_source_to_string(value);
+    return !str.empty();
+}
+
+template <>
+inline bool TypeConverter<SourceTraits>::fromStringImpl(
+        const std::string &str, audio_source_t &result) {
+    return audio_source_from_string(str.c_str(), &result);
+}
 
 SampleRateTraits::Collection samplingRatesFromString(
         const std::string &samplingRates, const char *del = AudioParameter::valueListSeparator);
@@ -256,6 +477,7 @@
 
 // counting enumerations
 template <typename T, std::enable_if_t<std::is_same<T, audio_content_type_t>::value
+                                    || std::is_same<T, audio_devices_t>::value
                                     || std::is_same<T, audio_mode_t>::value
                                     || std::is_same<T, audio_source_t>::value
                                     || std::is_same<T, audio_stream_type_t>::value
@@ -282,17 +504,6 @@
     return result;
 }
 
-static inline std::string toString(const audio_devices_t& devices)
-{
-    std::string result;
-    if ((devices & AUDIO_DEVICE_BIT_IN) != 0) {
-        InputDeviceConverter::maskToString(devices, result);
-    } else {
-        OutputDeviceConverter::maskToString(devices, result);
-    }
-    return result;
-}
-
 static inline std::string toString(const audio_attributes_t& attributes)
 {
     std::ostringstream result;
diff --git a/media/libmediahelper/tests/Android.bp b/media/libmediahelper/tests/Android.bp
new file mode 100644
index 0000000..c5ba122
--- /dev/null
+++ b/media/libmediahelper/tests/Android.bp
@@ -0,0 +1,22 @@
+cc_test {
+    name: "libmedia_helper_tests",
+
+    generated_headers: ["audio_policy_configuration_V7_0"],
+    generated_sources: ["audio_policy_configuration_V7_0"],
+    header_libs: ["libxsdc-utils"],
+    shared_libs: [
+        "libbase",
+        "liblog",
+        "libmedia_helper",
+        "libxml2",
+    ],
+
+    srcs: ["typeconverter_tests.cpp"],
+
+    cflags: [
+        "-Werror",
+        "-Wall",
+    ],
+
+    test_suites: ["device-tests"],
+}
diff --git a/media/libmediahelper/tests/typeconverter_tests.cpp b/media/libmediahelper/tests/typeconverter_tests.cpp
new file mode 100644
index 0000000..ab55c13
--- /dev/null
+++ b/media/libmediahelper/tests/typeconverter_tests.cpp
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2020 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 <gtest/gtest.h>
+
+#define LOG_TAG "TypeConverter_Test"
+#include <log/log.h>
+
+#include <audio_policy_configuration_V7_0.h>
+#include <media/TypeConverter.h>
+#include <system/audio.h>
+#include <xsdc/XsdcSupport.h>
+
+using namespace android;
+namespace xsd {
+using namespace audio::policy::configuration::V7_0;
+}
+
+TEST(TypeConverter, ParseChannelMasks) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioChannelMask>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_channel_mask_t channelMask = channelMaskFromString(stringVal);
+        EXPECT_EQ(stringVal != "AUDIO_CHANNEL_NONE", audio_channel_mask_is_valid(channelMask))
+                << "Validity of \"" << stringVal << "\" is not as expected";
+    }
+}
+
+TEST(TypeConverter, ParseInputOutputIndexChannelMask) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioChannelMask>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_channel_mask_t channelMask, channelMaskBack;
+        std::string stringValBack;
+        if (stringVal.find("_CHANNEL_IN_") != std::string::npos) {
+            EXPECT_TRUE(InputChannelConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" failed (as input channel mask)";
+            EXPECT_TRUE(InputChannelConverter::toString(channelMask, stringValBack))
+                    << "Conversion of input channel mask " << channelMask << " failed";
+            // Due to aliased values, the result of 'toString' might not be the same
+            // as 'stringVal', thus we need to compare the results of parsing instead.
+            EXPECT_TRUE(InputChannelConverter::fromString(stringValBack, channelMaskBack))
+                    << "Conversion of \"" << stringValBack << "\" failed (as input channel mask)";
+            EXPECT_EQ(channelMask, channelMaskBack);
+        } else if (stringVal.find("_CHANNEL_OUT_") != std::string::npos) {
+            EXPECT_TRUE(OutputChannelConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" failed (as output channel mask)";
+            EXPECT_TRUE(OutputChannelConverter::toString(channelMask, stringValBack))
+                    << "Conversion of output channel mask " << channelMask << " failed";
+            EXPECT_TRUE(OutputChannelConverter::fromString(stringValBack, channelMaskBack))
+                    << "Conversion of \"" << stringValBack << "\" failed (as output channel mask)";
+            EXPECT_EQ(channelMask, channelMaskBack);
+        } else if (stringVal.find("_CHANNEL_INDEX_") != std::string::npos) {
+            EXPECT_TRUE(ChannelIndexConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" failed (as indexed channel mask)";
+            EXPECT_TRUE(ChannelIndexConverter::toString(channelMask, stringValBack))
+                    << "Conversion of indexed channel mask " << channelMask << " failed";
+            EXPECT_EQ(stringVal, stringValBack);
+        } else if (stringVal == "AUDIO_CHANNEL_NONE") {
+            EXPECT_FALSE(InputChannelConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" succeeded (as input channel mask)";
+            EXPECT_FALSE(OutputChannelConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" succeeded (as output channel mask)";
+            EXPECT_FALSE(ChannelIndexConverter::fromString(stringVal, channelMask))
+                    << "Conversion of \"" << stringVal << "\" succeeded (as index channel mask)";
+            // None of Converters could parse this because 'NONE' isn't a 'valid' channel mask.
+            channelMask = AUDIO_CHANNEL_NONE;
+            // However they all must succeed in converting it back.
+            EXPECT_TRUE(InputChannelConverter::toString(channelMask, stringValBack))
+                    << "Conversion of input channel mask " << channelMask << " failed";
+            EXPECT_EQ(stringVal, stringValBack);
+            EXPECT_TRUE(OutputChannelConverter::toString(channelMask, stringValBack))
+                    << "Conversion of output channel mask " << channelMask << " failed";
+            EXPECT_EQ(stringVal, stringValBack);
+            EXPECT_TRUE(ChannelIndexConverter::toString(channelMask, stringValBack))
+                    << "Conversion of indexed channel mask " << channelMask << " failed";
+            EXPECT_EQ(stringVal, stringValBack);
+        }
+    }
+}
+
+TEST(TypeConverter, ParseContentTypes) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioContentType>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_content_type_t contentType;
+        EXPECT_TRUE(AudioContentTypeConverter::fromString(stringVal, contentType))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_EQ(stringVal, toString(contentType));
+    }
+}
+
+TEST(TypeConverter, ParseDevices) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioDevice>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_devices_t device, deviceBack;
+        std::string stringValBack;
+        EXPECT_TRUE(DeviceConverter::fromString(stringVal, device))
+                << "Conversion of \"" << stringVal << "\" failed";
+        if (stringVal != "AUDIO_DEVICE_NONE") {
+            EXPECT_TRUE(audio_is_input_device(device) || audio_is_output_device(device))
+                    << "Device \"" << stringVal << "\" is neither input, nor output device";
+        } else {
+            EXPECT_FALSE(audio_is_input_device(device));
+            EXPECT_FALSE(audio_is_output_device(device));
+        }
+        // Due to aliased values, the result of 'toString' might not be the same
+        // as 'stringVal', thus we need to compare the results of parsing instead.
+        stringValBack = toString(device);
+        EXPECT_TRUE(DeviceConverter::fromString(stringValBack, deviceBack))
+                << "Conversion of \"" << stringValBack << "\" failed";
+        EXPECT_EQ(device, deviceBack);
+    }
+}
+
+TEST(TypeConverter, ParseInOutDevices) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioDevice>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_devices_t device, deviceBack;
+        std::string stringValBack;
+        if (stringVal.find("_DEVICE_IN_") != std::string::npos) {
+            EXPECT_TRUE(InputDeviceConverter::fromString(stringVal, device))
+                    << "Conversion of \"" << stringVal << "\" failed (as input device)";
+            // Due to aliased values, the result of 'toString' might not be the same
+            // as 'stringVal', thus we need to compare the results of parsing instead.
+            stringValBack = toString(device);
+            EXPECT_TRUE(InputDeviceConverter::fromString(stringValBack, deviceBack))
+                    << "Conversion of \"" << stringValBack << "\" failed";
+            EXPECT_EQ(device, deviceBack);
+        } else if (stringVal.find("_DEVICE_OUT_") != std::string::npos) {
+            EXPECT_TRUE(OutputDeviceConverter::fromString(stringVal, device))
+                    << "Conversion of \"" << stringVal << "\" failed (as output device)";
+            stringValBack = toString(device);
+            EXPECT_TRUE(OutputDeviceConverter::fromString(stringValBack, deviceBack))
+                    << "Conversion of \"" << stringValBack << "\" failed";
+            EXPECT_EQ(device, deviceBack);
+        } else if (stringVal == "AUDIO_DEVICE_NONE") {
+            EXPECT_FALSE(InputDeviceConverter::fromString(stringVal, device))
+                    << "Conversion of \"" << stringVal << "\" succeeded (as input device)";
+            EXPECT_FALSE(OutputDeviceConverter::fromString(stringVal, device))
+                    << "Conversion of \"" << stringVal << "\" succeeded (as output device)";
+            EXPECT_EQ(stringVal, toString(device));
+        }
+    }
+}
+
+TEST (TypeConverter, ParseInOutFlags) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioInOutFlag>{}) {
+        const std::string stringVal = toString(enumVal);
+        if (stringVal.find("_INPUT_FLAG_") != std::string::npos) {
+            audio_input_flags_t flag;
+            EXPECT_TRUE(InputFlagConverter::fromString(stringVal, flag))
+                    << "Conversion of \"" << stringVal << "\" failed (as input flag)";
+            EXPECT_EQ(stringVal, toString(flag));
+        } else {
+            audio_output_flags_t flag;
+            EXPECT_TRUE(OutputFlagConverter::fromString(stringVal, flag))
+                    << "Conversion of \"" << stringVal << "\" failed (as output flag)";
+            EXPECT_EQ(stringVal, toString(flag));
+        }
+    }
+}
+
+TEST(TypeConverter, ParseFormats) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioFormat>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_format_t format;
+        EXPECT_TRUE(FormatConverter::fromString(stringVal, format))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_TRUE(audio_is_valid_format(format))
+                << "Converted format \"" << stringVal << "\" is invalid";
+        EXPECT_EQ(stringVal, toString(format));
+    }
+}
+
+TEST(TypeConverter, ParseGainModes) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioGainMode>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_gain_mode_t gainMode;
+        EXPECT_TRUE(GainModeConverter::fromString(stringVal, gainMode))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_EQ(stringVal, toString(gainMode));
+    }
+}
+
+TEST(TypeConverter, ParseSources) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioSource>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_source_t source;
+        EXPECT_TRUE(SourceTypeConverter::fromString(stringVal, source))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_EQ(source != AUDIO_SOURCE_DEFAULT, audio_is_valid_audio_source(source))
+                << "Validity of \"" << stringVal << "\" is not as expected";
+        EXPECT_EQ(stringVal, toString(source));
+    }
+}
+
+TEST(TypeConverter, ParseStreamTypes) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioStreamType>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_stream_type_t streamType;
+        EXPECT_TRUE(StreamTypeConverter::fromString(stringVal, streamType))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_EQ(stringVal, toString(streamType));
+    }
+}
+
+TEST(TypeConverter, ParseUsages) {
+    for (const auto enumVal : xsdc_enum_range<xsd::AudioUsage>{}) {
+        const std::string stringVal = toString(enumVal);
+        audio_usage_t usage;
+        EXPECT_TRUE(UsageTypeConverter::fromString(stringVal, usage))
+                << "Conversion of \"" << stringVal << "\" failed";
+        EXPECT_EQ(stringVal, toString(usage));
+    }
+}
diff --git a/media/libmediaplayerservice/tests/stagefrightRecorder/StagefrightRecorderTest.cpp b/media/libmediaplayerservice/tests/stagefrightRecorder/StagefrightRecorderTest.cpp
index ac17ef3..5751631 100644
--- a/media/libmediaplayerservice/tests/stagefrightRecorder/StagefrightRecorderTest.cpp
+++ b/media/libmediaplayerservice/tests/stagefrightRecorder/StagefrightRecorderTest.cpp
@@ -29,7 +29,7 @@
 #include <MediaPlayerService.h>
 #include <media/NdkMediaExtractor.h>
 #include <media/stagefright/MediaCodec.h>
-#include <system/audio-base.h>
+#include <system/audio.h>
 
 #include "StagefrightRecorder.h"
 
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 8a1a5bd..a555ebf 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1902,9 +1902,8 @@
                                        : AUDIO_DEVICE_NONE));
     }
 
-    // ++ operator does not compile
-    for (audio_stream_type_t stream = AUDIO_STREAM_MIN; stream < AUDIO_STREAM_FOR_POLICY_CNT;
-            stream = (audio_stream_type_t) (stream + 1)) {
+    for (int i = AUDIO_STREAM_MIN; i < AUDIO_STREAM_FOR_POLICY_CNT; ++i) {
+        const audio_stream_type_t stream{static_cast<audio_stream_type_t>(i)};
         mStreamTypes[stream].volume = 0.0f;
         mStreamTypes[stream].mute = mAudioFlinger->streamMute_l(stream);
     }
diff --git a/services/audiopolicy/common/managerdefinitions/src/IOProfile.cpp b/services/audiopolicy/common/managerdefinitions/src/IOProfile.cpp
index bf1a0f7..ae92b40 100644
--- a/services/audiopolicy/common/managerdefinitions/src/IOProfile.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/IOProfile.cpp
@@ -17,7 +17,7 @@
 #define LOG_TAG "APM::IOProfile"
 //#define LOG_NDEBUG 0
 
-#include <system/audio-base.h>
+#include <system/audio.h>
 #include "IOProfile.h"
 #include "HwModule.h"
 #include "TypeConverter.h"
@@ -112,12 +112,11 @@
     dst->append(portStr.c_str());
 
     dst->appendFormat("    - flags: 0x%04x", getFlags());
-    std::string flagsLiteral;
-    if (getRole() == AUDIO_PORT_ROLE_SINK) {
-        InputFlagConverter::maskToString(getFlags(), flagsLiteral);
-    } else if (getRole() == AUDIO_PORT_ROLE_SOURCE) {
-        OutputFlagConverter::maskToString(getFlags(), flagsLiteral);
-    }
+    std::string flagsLiteral =
+            getRole() == AUDIO_PORT_ROLE_SINK ?
+            toString(static_cast<audio_input_flags_t>(getFlags())) :
+            getRole() == AUDIO_PORT_ROLE_SOURCE ?
+            toString(static_cast<audio_output_flags_t>(getFlags())) : "";
     if (!flagsLiteral.empty()) {
         dst->appendFormat(" (%s)", flagsLiteral.c_str());
     }
diff --git a/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp b/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
index 889f031..0981bca 100644
--- a/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
@@ -337,7 +337,7 @@
 
     std::string mode = getXmlAttribute(cur, Attributes::mode);
     if (!mode.empty()) {
-        gain->setMode(static_cast<audio_gain_mode_t>(GainModeConverter::maskFromString(mode)));
+        gain->setMode(GainModeConverter::maskFromString(mode, " "));
     }
 
     std::string channelsLiteral = getXmlAttribute(cur, Attributes::channelMask);
@@ -501,7 +501,7 @@
                 AUDIO_PORT_ROLE_SOURCE : AUDIO_PORT_ROLE_SINK;
 
     audio_devices_t type = AUDIO_DEVICE_NONE;
-    if (!deviceFromString(typeName, type) ||
+    if (!DeviceConverter::fromString(typeName, type) ||
             (!audio_is_input_device(type) && portRole == AUDIO_PORT_ROLE_SOURCE) ||
             (!audio_is_output_devices(type) && portRole == AUDIO_PORT_ROLE_SINK)) {
         ALOGW("%s: bad type %08x", __func__, type);
diff --git a/services/audiopolicy/config/audio_policy_configuration.xml b/services/audiopolicy/config/audio_policy_configuration.xml
index b28381b..dcdc035 100644
--- a/services/audiopolicy/config/audio_policy_configuration.xml
+++ b/services/audiopolicy/config/audio_policy_configuration.xml
@@ -91,7 +91,7 @@
                 <!-- Output devices declaration, i.e. Sink DEVICE PORT -->
                 <devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink">
                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
+                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
                 </devicePort>
                 <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address="">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
diff --git a/services/audiopolicy/config/audio_policy_configuration_7_0.xml b/services/audiopolicy/config/audio_policy_configuration_7_0.xml
index b30ab30..31c8954 100644
--- a/services/audiopolicy/config/audio_policy_configuration_7_0.xml
+++ b/services/audiopolicy/config/audio_policy_configuration_7_0.xml
@@ -91,7 +91,7 @@
                 <!-- Output devices declaration, i.e. Sink DEVICE PORT -->
                 <devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink">
                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
+                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
                 </devicePort>
                 <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address="">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
diff --git a/services/audiopolicy/engineconfigurable/tools/buildCommonTypesStructureFile.py b/services/audiopolicy/engineconfigurable/tools/buildCommonTypesStructureFile.py
index f060d45..5083b14 100755
--- a/services/audiopolicy/engineconfigurable/tools/buildCommonTypesStructureFile.py
+++ b/services/audiopolicy/engineconfigurable/tools/buildCommonTypesStructureFile.py
@@ -126,9 +126,9 @@
     ignored_values = ['CNT', 'MAX', 'ALL', 'NONE']
 
     criteria_pattern = re.compile(
-        r"\s*(?P<type>(?:"+'|'.join(component_type_mapping_table.keys()) + "))_" \
-        r"(?P<literal>(?!" + '|'.join(ignored_values) + ")\w*)\s*=\s*" \
-        r"(?P<values>(?:0[xX])?[0-9a-fA-F]+)")
+        r"\s*V\((?P<type>(?:"+'|'.join(component_type_mapping_table.keys()) + "))_" \
+        r"(?P<literal>(?!" + '|'.join(ignored_values) + ")\w*)\s*,\s*" \
+        r"(?:AUDIO_DEVICE_BIT_IN \| )?(?P<values>(?:0[xX])[0-9a-fA-F]+|[0-9]+)")
 
     logging.info("Checking Android Header file {}".format(androidaudiobaseheaderFile))
 
@@ -164,6 +164,13 @@
 
             logging.debug("type:{}, literal:{}, values:{}.".format(component_type_name, component_type_literal, component_type_numerical_value))
 
+    if "stub" not in all_component_types["OutputDevicesMask"]:
+        all_component_types["OutputDevicesMask"]["stub"] = 0x40000000
+        logging.info("added stub output device mask")
+    if "stub" not in all_component_types["InputDevicesMask"]:
+        all_component_types["InputDevicesMask"]["stub"] = 0x40000000
+        logging.info("added stub input device mask")
+
     # Transform input source in inclusive criterion
     shift = len(all_component_types['OutputDevicesMask'])
     if shift > 32:
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 047b804..f2efdee 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -5552,8 +5552,8 @@
     }
     DeviceVector activeDevices;
     DeviceVector devices;
-    for (audio_stream_type_t curStream = AUDIO_STREAM_MIN; curStream < AUDIO_STREAM_PUBLIC_CNT;
-         curStream = (audio_stream_type_t) (curStream + 1)) {
+    for (int i = AUDIO_STREAM_MIN; i < AUDIO_STREAM_PUBLIC_CNT; ++i) {
+        const audio_stream_type_t curStream{static_cast<audio_stream_type_t>(i)};
         if (!streamsMatchForvolume(stream, curStream)) {
             continue;
         }
diff --git a/services/mediametrics/AudioPowerUsage.cpp b/services/mediametrics/AudioPowerUsage.cpp
index 33dfa8fa..34be0b9 100644
--- a/services/mediametrics/AudioPowerUsage.cpp
+++ b/services/mediametrics/AudioPowerUsage.cpp
@@ -28,7 +28,7 @@
 #include <cutils/properties.h>
 #include <statslog.h>
 #include <sys/timerfd.h>
-#include <system/audio-base.h>
+#include <system/audio.h>
 
 // property to disable audio power use metrics feature, default is enabled
 #define PROP_AUDIO_METRICS_DISABLED "persist.media.audio_metrics.power_usage_disabled"