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) 386e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles)class MediaStreamAudioBus; 396e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles)class MediaStreamAudioFifo; 405d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class RTCMediaConstraints; 415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)using webrtc::AudioProcessorInterface; 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 44f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// This class owns an object of webrtc::AudioProcessing which contains signal 45f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// processing components like AGC, AEC and NS. It enables the components based 46f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// on the getUserMedia constraints, processes the data and outputs it in a unit 47f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// of 10 ms data chunk. 485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class CONTENT_EXPORT MediaStreamAudioProcessor : 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NON_EXPORTED_BASE(public WebRtcPlayoutDataSource::Sink), 50f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) NON_EXPORTED_BASE(public AudioProcessorInterface), 51f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) NON_EXPORTED_BASE(public AecDumpMessageFilter::AecDumpDelegate) { 52f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) public: 53cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Returns false if |kDisableAudioTrackProcessing| is set to true, otherwise 54cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // returns true. 550529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch static bool IsAudioTrackProcessingEnabled(); 560529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| is used to register this class as a sink to the 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtc playout data for processing AEC. If clients do not enable AEC, 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| won't be used. 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MediaStreamAudioProcessor(const blink::WebMediaConstraints& constraints, 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int effects, 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) WebRtcPlayoutDataSource* playout_data_source); 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 646e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Called when the format of the capture data has changed. 656e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Called on the main render thread. The caller is responsible for stopping 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // the capture thread before calling this method. 67a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // After this method, the capture thread will be changed to a new capture 68a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // thread. 69a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void OnCaptureFormatChanged(const media::AudioParameters& source_params); 70f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 716e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Pushes capture data in |audio_source| to the internal FIFO. Each call to 726e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // this method should be followed by calls to ProcessAndConsumeData() while 736e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // it returns false, to pull out all available data. 74f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 75116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch void PushCaptureData(const media::AudioBus* audio_source); 76f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 77f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Processes a block of 10 ms data from the internal FIFO and outputs it via 78f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // |out|. |out| is the address of the pointer that will be pointed to 79f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the post-processed data if the method is returning a true. The lifetime 806e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // of the data represeted by |out| is guaranteed until this method is called 816e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // again. 825d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // |new_volume| receives the new microphone volume from the AGC. 836e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // The new microphone volume range is [0, 255], and the value will be 0 if 845d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // the microphone volume should not be adjusted. 85f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Returns true if the internal FIFO has at least 10 ms data for processing, 86f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // otherwise false. 87f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 886e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // 896e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // TODO(ajm): Don't we want this to output float? 90f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool ProcessAndConsumeData(base::TimeDelta capture_delay, 91f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int volume, 92f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool key_pressed, 935d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int* new_volume, 94f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int16** out); 95f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 96116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Stops the audio processor, no more AEC dump or render data after calling 97116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // this method. 98116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch void Stop(); 99116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1006e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // The audio formats of the capture input to and output from the processor. 1016e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Must only be called on the main render or audio capture threads. 1025d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const media::AudioParameters& InputFormat() const; 103f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const media::AudioParameters& OutputFormat() const; 104f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 105f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Accessor to check if the audio processing is enabled or not. 1065d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool has_audio_processing() const { return audio_processing_ != NULL; } 1075d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 108f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // AecDumpMessageFilter::AecDumpDelegate implementation. 109a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called on the main render thread. 110f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnAecDumpFile( 111f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) const IPC::PlatformFileForTransit& file_handle) OVERRIDE; 112f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnDisableAecDump() OVERRIDE; 113f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) virtual void OnIpcClosing() OVERRIDE; 114a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) protected: 1165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class base::RefCountedThreadSafe<MediaStreamAudioProcessor>; 1175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) virtual ~MediaStreamAudioProcessor(); 118f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 119f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) private: 1205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class MediaStreamAudioProcessorTest; 121116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch FRIEND_TEST_ALL_PREFIXES(MediaStreamAudioProcessorTest, 122116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch GetAecDumpMessageFilter); 1235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 124a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtcPlayoutDataSource::Sink implementation. 125a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutData(media::AudioBus* audio_bus, 126a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int sample_rate, 127a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int audio_delay_milliseconds) OVERRIDE; 128a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutDataSourceChanged() OVERRIDE; 129a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 130a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // webrtc::AudioProcessorInterface implementation. 131a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This method is called on the libjingle thread. 132a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void GetStats(AudioProcessorStats* stats) OVERRIDE; 133a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 134f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the WebRtc AudioProcessing. 135f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void InitializeAudioProcessingModule( 136cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const blink::WebMediaConstraints& constraints, int effects); 1375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Helper to initialize the capture converter. 1396e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) void InitializeCaptureFifo(const media::AudioParameters& input_format); 140f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 141f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the render converter. 1426e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) void InitializeRenderFifoIfNeeded(int sample_rate, 1436e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) int number_of_channels, 1446e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) int frames_per_buffer); 145f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 146f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called by ProcessAndConsumeData(). 1475d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Returns the new microphone volume in the range of |0, 255]. 1485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // When the volume does not need to be updated, it returns 0. 1496e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) int ProcessData(const float* const* process_ptrs, 1506e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) int process_frames, 1515d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::TimeDelta capture_delay, 1525d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int volume, 1536e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) bool key_pressed, 1546e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) float* const* output_ptrs); 155f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 156f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Cached value for the render delay latency. This member is accessed by 157f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // both the capture audio thread and the render audio thread. 158f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::subtle::Atomic32 render_delay_ms_; 159f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1606e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Module to handle processing and format conversion. 161f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<webrtc::AudioProcessing> audio_processing_; 162f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1636e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // FIFO to provide 10 ms capture chunks. 1646e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) scoped_ptr<MediaStreamAudioFifo> capture_fifo_; 1656e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Receives processing output. 1666e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) scoped_ptr<MediaStreamAudioBus> output_bus_; 1676e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Receives interleaved int16 data for output. 1686e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) scoped_ptr<int16[]> output_data_; 169f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1706e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // FIFO to provide 10 ms render chunks when the AEC is enabled. 1716e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) scoped_ptr<MediaStreamAudioFifo> render_fifo_; 172f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1736e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // These are mutated on the main render thread in OnCaptureFormatChanged(). 1746e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // The caller guarantees this does not run concurrently with accesses on the 1756e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // capture audio thread. 1766e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) media::AudioParameters input_format_; 1776e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) media::AudioParameters output_format_; 1786e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Only used on the render audio thread. 1796e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) media::AudioParameters render_format_; 180f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 181a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Raw pointer to the WebRtcPlayoutDataSource, which is valid for the 182a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // lifetime of RenderThread. 183116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch WebRtcPlayoutDataSource* playout_data_source_; 184a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1856e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Used to DCHECK that some methods are called on the main render thread. 186f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker main_thread_checker_; 187f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Used to DCHECK that some methods are called on the capture audio thread. 188f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker capture_thread_checker_; 1896e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Used to DCHECK that some methods are called on the render audio thread. 190f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker render_thread_checker_; 1915d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1926e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // Flag to enable stereo channel mirroring. 1935d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool audio_mirroring_; 194a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 195a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) scoped_ptr<webrtc::TypingDetection> typing_detector_; 196a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This flag is used to show the result of typing detection. 197a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // It can be accessed by the capture audio thread and by the libjingle thread 198a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // which calls GetStats(). 199a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::subtle::Atomic32 typing_detected_; 200f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 201f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Communication with browser for AEC dump. 202f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_; 203116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 204116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Flag to avoid executing Stop() more than once. 205116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch bool stopped_; 206f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)}; 207f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 208f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} // namespace content 209f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 210f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_H_ 211