1f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 2f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// found in the LICENSE file. 4f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 5f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_H_ 6f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_H_ 7f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 8f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/atomicops.h" 90529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch#include "base/files/file.h" 10f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/synchronization/lock.h" 11f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/threading/thread_checker.h" 12f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/time/time.h" 13f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "content/common/content_export.h" 14f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include "content/renderer/media/aec_dump_message_filter.h" 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "content/renderer/media/webrtc_audio_device_impl.h" 16f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/base/audio_converter.h" 17a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h" 18f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "third_party/webrtc/modules/audio_processing/include/audio_processing.h" 19f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "third_party/webrtc/modules/interface/module_common_types.h" 20f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 215d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace blink { 225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class WebMediaConstraints; 235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 25f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)namespace media { 26f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)class AudioBus; 27f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)class AudioFifo; 28f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)class AudioParameters; 29f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} // namespace media 30f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 31f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)namespace webrtc { 32f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)class AudioFrame; 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)class TypingDetection; 34f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} 35f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 36f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)namespace content { 37f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class RTCMediaConstraints; 395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)using webrtc::AudioProcessorInterface; 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 42f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// This class owns an object of webrtc::AudioProcessing which contains signal 43f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// processing components like AGC, AEC and NS. It enables the components based 44f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// on the getUserMedia constraints, processes the data and outputs it in a unit 45f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// of 10 ms data chunk. 465d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class CONTENT_EXPORT MediaStreamAudioProcessor : 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NON_EXPORTED_BASE(public WebRtcPlayoutDataSource::Sink), 48f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) NON_EXPORTED_BASE(public AudioProcessorInterface), 49f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) NON_EXPORTED_BASE(public AecDumpMessageFilter::AecDumpDelegate) { 50f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) public: 51cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Returns false if |kDisableAudioTrackProcessing| is set to true, otherwise 52cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // returns true. 530529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch static bool IsAudioTrackProcessingEnabled(); 540529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| is used to register this class as a sink to the 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtc playout data for processing AEC. If clients do not enable AEC, 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| won't be used. 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MediaStreamAudioProcessor(const blink::WebMediaConstraints& constraints, 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int effects, 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) WebRtcPlayoutDataSource* playout_data_source); 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called when format of the capture data has changed. 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called on the main render thread. The caller is responsible for stopping 64a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // the capture thread before calling this method. 65a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // After this method, the capture thread will be changed to a new capture 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // thread. 67a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void OnCaptureFormatChanged(const media::AudioParameters& source_params); 68f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 69f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Pushes capture data in |audio_source| to the internal FIFO. 70f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 71bee9932bab44713b74b422b4b759b49f5a222977Bo Liu void PushCaptureData(const media::AudioBus* audio_source); 72f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 73f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Processes a block of 10 ms data from the internal FIFO and outputs it via 74f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // |out|. |out| is the address of the pointer that will be pointed to 75f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the post-processed data if the method is returning a true. The lifetime 76f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // of the data represeted by |out| is guaranteed to outlive the method call. 77f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // That also says *|out| won't change until this method is called again. 785d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // |new_volume| receives the new microphone volume from the AGC. 795d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // The new microphoen volume range is [0, 255], and the value will be 0 if 805d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // the microphone volume should not be adjusted. 81f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Returns true if the internal FIFO has at least 10 ms data for processing, 82f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // otherwise false. 83f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // |capture_delay|, |volume| and |key_pressed| will be passed to 84f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // webrtc::AudioProcessing to help processing the data. 85f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 86f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool ProcessAndConsumeData(base::TimeDelta capture_delay, 87f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int volume, 88f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool key_pressed, 895d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int* new_volume, 90f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int16** out); 91f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 92bee9932bab44713b74b422b4b759b49f5a222977Bo Liu // Stops the audio processor, no more AEC dump or render data after calling 93bee9932bab44713b74b422b4b759b49f5a222977Bo Liu // this method. 94bee9932bab44713b74b422b4b759b49f5a222977Bo Liu void Stop(); 95bee9932bab44713b74b422b4b759b49f5a222977Bo Liu 965d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // The audio format of the input to the processor. 975d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const media::AudioParameters& InputFormat() const; 98f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 99f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // The audio format of the output from the processor. 100f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const media::AudioParameters& OutputFormat() const; 101f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 102f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Accessor to check if the audio processing is enabled or not. 1035d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool has_audio_processing() const { return audio_processing_ != NULL; } 1045d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 105f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // AecDumpMessageFilter::AecDumpDelegate implementation. 106a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called on the main render thread. 107f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnAecDumpFile( 108f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) const IPC::PlatformFileForTransit& file_handle) OVERRIDE; 109f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnDisableAecDump() OVERRIDE; 110f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnIpcClosing() OVERRIDE; 111a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) protected: 1135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class base::RefCountedThreadSafe<MediaStreamAudioProcessor>; 1145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) virtual ~MediaStreamAudioProcessor(); 115f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 116f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) private: 1175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class MediaStreamAudioProcessorTest; 1185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 119f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) class MediaStreamAudioConverter; 120f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 121a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtcPlayoutDataSource::Sink implementation. 122a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutData(media::AudioBus* audio_bus, 123a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int sample_rate, 124a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int audio_delay_milliseconds) OVERRIDE; 125a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutDataSourceChanged() OVERRIDE; 126a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 127a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // webrtc::AudioProcessorInterface implementation. 128a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This method is called on the libjingle thread. 129a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void GetStats(AudioProcessorStats* stats) OVERRIDE; 130a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 131f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the WebRtc AudioProcessing. 132f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void InitializeAudioProcessingModule( 133cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const blink::WebMediaConstraints& constraints, int effects); 1345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1355d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Helper to initialize the capture converter. 1365d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) void InitializeCaptureConverter(const media::AudioParameters& source_params); 137f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 138f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the render converter. 139f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void InitializeRenderConverterIfNeeded(int sample_rate, 140f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int number_of_channels, 141f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int frames_per_buffer); 142f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 143f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called by ProcessAndConsumeData(). 1445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Returns the new microphone volume in the range of |0, 255]. 1455d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // When the volume does not need to be updated, it returns 0. 1465d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int ProcessData(webrtc::AudioFrame* audio_frame, 1475d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::TimeDelta capture_delay, 1485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int volume, 1495d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool key_pressed); 150f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 151f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Cached value for the render delay latency. This member is accessed by 152f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // both the capture audio thread and the render audio thread. 153f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::subtle::Atomic32 render_delay_ms_; 154f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 155f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // webrtc::AudioProcessing module which does AEC, AGC, NS, HighPass filter, 156f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // ..etc. 157f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<webrtc::AudioProcessing> audio_processing_; 158f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 159f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Converter used for the down-mixing and resampling of the capture data. 160f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<MediaStreamAudioConverter> capture_converter_; 161f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 162f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // AudioFrame used to hold the output of |capture_converter_|. 163f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) webrtc::AudioFrame capture_frame_; 164f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 165f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Converter used for the down-mixing and resampling of the render data when 166f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the AEC is enabled. 167f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<MediaStreamAudioConverter> render_converter_; 168f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 169f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // AudioFrame used to hold the output of |render_converter_|. 170f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) webrtc::AudioFrame render_frame_; 171f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 172f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Data bus to help converting interleaved data to an AudioBus. 173f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<media::AudioBus> render_data_bus_; 174f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 175a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Raw pointer to the WebRtcPlayoutDataSource, which is valid for the 176a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // lifetime of RenderThread. 177bee9932bab44713b74b422b4b759b49f5a222977Bo Liu WebRtcPlayoutDataSource* playout_data_source_; 178a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 179a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Used to DCHECK that the destructor is called on the main render thread. 180f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker main_thread_checker_; 181f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 182f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Used to DCHECK that some methods are called on the capture audio thread. 183f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker capture_thread_checker_; 184f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 185f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Used to DCHECK that PushRenderData() is called on the render audio thread. 186f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker render_thread_checker_; 1875d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1885d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Flag to enable the stereo channels mirroring. 1895d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool audio_mirroring_; 190a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 191a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Used by the typing detection. 192a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) scoped_ptr<webrtc::TypingDetection> typing_detector_; 193a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 194a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This flag is used to show the result of typing detection. 195a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // It can be accessed by the capture audio thread and by the libjingle thread 196a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // which calls GetStats(). 197a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::subtle::Atomic32 typing_detected_; 198f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 199f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Communication with browser for AEC dump. 200f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_; 201bee9932bab44713b74b422b4b759b49f5a222977Bo Liu 202bee9932bab44713b74b422b4b759b49f5a222977Bo Liu // Flag to avoid executing Stop() more than once. 203bee9932bab44713b74b422b4b759b49f5a222977Bo Liu bool stopped_; 204f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)}; 205f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 206f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} // namespace content 207f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 208f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_H_ 209