Introduce AudioBufferMemoryPool to avoid thrashing on audio buffers.

media/filters/android/media_codec_audio_decoder.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/android/media_codec_audio_decoder.h"
 
 #include "base/android/build_info.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/base/android/media_codec_bridge_impl.h"
-#include "media/base/audio_buffer.h"
 #include "media/base/audio_timestamp_helper.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/timestamp_constants.h"
 
 namespace media {
 
 MediaCodecAudioDecoder::MediaCodecAudioDecoder(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
     : task_runner_(task_runner),
       state_(STATE_UNINITIALIZED),
       channel_count_(0),
       channel_layout_(CHANNEL_LAYOUT_NONE),
       sample_rate_(0),
       media_drm_bridge_cdm_context_(nullptr),
       cdm_registration_id_(0),
+      pool_(new AudioBufferMemoryPool()),
       weak_factory_(this) {
   DVLOG(1) << __func__;
 }
 
 MediaCodecAudioDecoder::~MediaCodecAudioDecoder() {
   DVLOG(1) << __func__;
 
   codec_loop_.reset();
 
   if (media_drm_bridge_cdm_context_) {
@@ skipping 317 matching lines @@
 
   // For proper |frame_count| calculation we need to use the actual number
   // of channels which can be different from |config_| value.
   DCHECK_GT(channel_count_, 0);
 
   // Android MediaCodec can only output 16bit PCM audio.
   const int bytes_per_frame = sizeof(uint16_t) * channel_count_;
   const size_t frame_count = out.size / bytes_per_frame;
 
   // Create AudioOutput buffer based on current parameters.
-  scoped_refptr<AudioBuffer> audio_buffer =
-      AudioBuffer::CreateBuffer(kSampleFormatS16, channel_layout_,
-                                channel_count_, sample_rate_, frame_count);
+  scoped_refptr<AudioBuffer> audio_buffer = AudioBuffer::CreateBuffer(
+      kSampleFormatS16, channel_layout_, channel_count_, sample_rate_,
+      frame_count, pool_);
 
   // Copy data into AudioBuffer.
   CHECK_LE(out.size, audio_buffer->data_size());
 
   MediaCodecStatus status = media_codec->CopyFromOutputBuffer(
       out.index, out.offset, audio_buffer->channel_data()[0], out.size);
 
   // Release MediaCodec output buffer.
   media_codec->ReleaseOutputBuffer(out.index, false);
 
@@ skipping 88 matching lines @@
     RETURN_STRING(STATE_READY);
     RETURN_STRING(STATE_ERROR);
   }
   NOTREACHED() << "Unknown state " << state;
   return nullptr;
 }
 
 #undef RETURN_STRING
 
 }  // namespace media