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Commit 8ef74639 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "Apply gain to the audio track stream" am: a9e79798 am: 17db1530 am:... 

Merge "Apply gain to the audio track stream" am: a9e79798 am: 17db1530 am: b31222e5 am: c5b79783 am: a95c6779

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2530269



Change-Id: Ic01b8e87a0255a306268ebbaad1e3f2aa8a0b30f
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents f1391633 a95c6779

system/btif/src/btif_a2dp_sink.cc

+1 −1
Original line number Diff line number Diff line
@@ -735,7 +735,7 @@ static void btif_a2dp_sink_set_focus_state_event( 
}



void btif_a2dp_sink_set_audio_track_gain(float gain) {

  LOG_INFO("%s: set gain to %f", __func__, gain);

  LOG_DEBUG("%s: set gain to %f", __func__, gain);

  LockGuard lock(g_mutex);



#ifndef OS_GENERIC

system/btif/src/btif_avrcp_audio_track.cc

+25 −4
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ 
#include <base/logging.h>

#include <utils/StrongPointer.h>



#include <algorithm>



#include "bt_target.h"

#include "osi/include/log.h"
@@ -34,6 +36,7 @@ typedef struct { 
  int channelCount;

  float* buffer;

  size_t bufferLength;

  float gain;

} BtifAvrcpAudioTrack;



#if (DUMP_PCM_DATA == TRUE)
@@ -41,6 +44,11 @@ FILE* outputPcmSampleFile; 
char outputFilename[50] = "/data/misc/bluedroid/output_sample.pcm";

#endif



// Maximum track gain that can be set.

constexpr float kMaxTrackGain = 1.0f;

// Minimum track gain that can be set.

constexpr float kMinTrackGain = 0.0f;



void* BtifAvrcpAudioTrackCreate(int trackFreq, int bitsPerSample,

                                int channelCount) {

  LOG_VERBOSE("%s Track.cpp: btCreateTrack freq %d bps %d channel %d ",
@@ -66,6 +74,7 @@ void* BtifAvrcpAudioTrackCreate(int trackFreq, int bitsPerSample, 
  trackHolder->channelCount = channelCount;

  trackHolder->bufferLength =

      trackHolder->channelCount * AAudioStream_getBufferSizeInFrames(stream);

  trackHolder->gain = kMaxTrackGain;

  trackHolder->buffer = new float[trackHolder->bufferLength]();



#if (DUMP_PCM_DATA == TRUE)
@@ -137,7 +146,16 @@ void BtifAvrcpSetAudioTrackGain(void* handle, float gain) { 
    LOG_INFO("%s handle is null.", __func__);

    return;

  }

  // Does nothing right now

  BtifAvrcpAudioTrack* trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);

  if (trackHolder != NULL) {

    const float clampedGain = std::clamp(gain, kMinTrackGain, kMaxTrackGain);

    if (clampedGain != gain) {

      LOG_WARN("Out of bounds gain set. Clamping the gain from :%f to %f", gain,

               clampedGain);

    }

    trackHolder->gain = clampedGain;

    LOG_INFO("Avrcp audio track gain is set to %f", trackHolder->gain);

  }

}



constexpr float kScaleQ15ToFloat = 1.0f / 32768.0f;
@@ -152,8 +170,9 @@ static size_t transcodeQ15ToFloat(uint8_t* buffer, size_t length, 
                                  BtifAvrcpAudioTrack* trackHolder) {

  size_t sampleSize = sampleSizeFor(trackHolder);

  size_t i = 0;

  const float scaledGain = trackHolder->gain * kScaleQ15ToFloat;

  for (; i <= length / sampleSize; i++) {

    trackHolder->buffer[i] = ((int16_t*)buffer)[i] * kScaleQ15ToFloat;

    trackHolder->buffer[i] = ((int16_t*)buffer)[i] * scaledGain;

  }

  return i * sampleSize;

}
@@ -162,10 +181,11 @@ static size_t transcodeQ23ToFloat(uint8_t* buffer, size_t length, 
                                  BtifAvrcpAudioTrack* trackHolder) {

  size_t sampleSize = sampleSizeFor(trackHolder);

  size_t i = 0;

  const float scaledGain = trackHolder->gain * kScaleQ23ToFloat;

  for (; i <= length / sampleSize; i++) {

    size_t offset = i * sampleSize;

    int32_t sample = *((int32_t*)(buffer + offset - 1)) & 0x00FFFFFF;

    trackHolder->buffer[i] = sample * kScaleQ23ToFloat;

    trackHolder->buffer[i] = sample * scaledGain;

  }

  return i * sampleSize;

}
@@ -174,8 +194,9 @@ static size_t transcodeQ31ToFloat(uint8_t* buffer, size_t length, 
                                  BtifAvrcpAudioTrack* trackHolder) {

  size_t sampleSize = sampleSizeFor(trackHolder);

  size_t i = 0;

  const float scaledGain = trackHolder->gain * kScaleQ31ToFloat;

  for (; i <= length / sampleSize; i++) {

    trackHolder->buffer[i] = ((int32_t*)buffer)[i] * kScaleQ31ToFloat;

    trackHolder->buffer[i] = ((int32_t*)buffer)[i] * scaledGain;

  }

  return i * sampleSize;

}