media_stream_audio_processor.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9
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" 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/platform_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" 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "content/public/common/media_stream_request.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), 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NON_EXPORTED_BASE(public AudioProcessorInterface) { 49f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) public: 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| is used to register this class as a sink to the 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtc playout data for processing AEC. If clients do not enable AEC, 52a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |playout_data_source| won't be used. 53a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MediaStreamAudioProcessor(const blink::WebMediaConstraints& constraints, 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int effects, 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MediaStreamType type, 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) WebRtcPlayoutDataSource* playout_data_source); 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called when format of the capture data has changed. 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called on the main render thread. The caller is responsible for stopping 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // the capture thread before calling this method. 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // After this method, the capture thread will be changed to a new capture 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // thread. 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void OnCaptureFormatChanged(const media::AudioParameters& source_params); 64f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 65f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Pushes capture data in |audio_source| to the internal FIFO. 66f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 67f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void PushCaptureData(media::AudioBus* audio_source); 68f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 69f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Processes a block of 10 ms data from the internal FIFO and outputs it via 70f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // |out|. |out| is the address of the pointer that will be pointed to 71f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the post-processed data if the method is returning a true. The lifetime 72f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // of the data represeted by |out| is guaranteed to outlive the method call. 73f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // That also says *|out| won't change until this method is called again. 745d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // |new_volume| receives the new microphone volume from the AGC. 755d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // The new microphoen volume range is [0, 255], and the value will be 0 if 765d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // the microphone volume should not be adjusted. 77f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Returns true if the internal FIFO has at least 10 ms data for processing, 78f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // otherwise false. 79f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // |capture_delay|, |volume| and |key_pressed| will be passed to 80f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // webrtc::AudioProcessing to help processing the data. 81f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called on the capture audio thread. 82f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool ProcessAndConsumeData(base::TimeDelta capture_delay, 83f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int volume, 84f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool key_pressed, 855d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int* new_volume, 86f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int16** out); 87f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 88a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool IsAudioTrackProcessingEnabled() const; 895d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 905d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // The audio format of the input to the processor. 915d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const media::AudioParameters& InputFormat() const; 92f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 93f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // The audio format of the output from the processor. 94f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const media::AudioParameters& OutputFormat() const; 95f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 96f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Accessor to check if the audio processing is enabled or not. 975d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool has_audio_processing() const { return audio_processing_ != NULL; } 985d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 99a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Starts/Stops the Aec dump on the |audio_processing_|. 100a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Called on the main render thread. 101a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This method takes the ownership of |aec_dump_file|. 102a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void StartAecDump(const base::PlatformFile& aec_dump_file); 103a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void StopAecDump(); 104a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1055d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) protected: 1065d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class base::RefCountedThreadSafe<MediaStreamAudioProcessor>; 1075d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) virtual ~MediaStreamAudioProcessor(); 108f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 109f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) private: 1105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class MediaStreamAudioProcessorTest; 1115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 112f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) class MediaStreamAudioConverter; 113f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 114a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // WebRtcPlayoutDataSource::Sink implementation. 115a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutData(media::AudioBus* audio_bus, 116a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int sample_rate, 117a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int audio_delay_milliseconds) OVERRIDE; 118a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void OnPlayoutDataSourceChanged() OVERRIDE; 119a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 120a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // webrtc::AudioProcessorInterface implementation. 121a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This method is called on the libjingle thread. 122a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) virtual void GetStats(AudioProcessorStats* stats) OVERRIDE; 123a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 124f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the WebRtc AudioProcessing. 125f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void InitializeAudioProcessingModule( 126a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const blink::WebMediaConstraints& constraints, int effects, 127a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MediaStreamType type); 1285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Helper to initialize the capture converter. 1305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) void InitializeCaptureConverter(const media::AudioParameters& source_params); 131f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 132f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Helper to initialize the render converter. 133f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void InitializeRenderConverterIfNeeded(int sample_rate, 134f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int number_of_channels, 135f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) int frames_per_buffer); 136f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 137f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called by ProcessAndConsumeData(). 1385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Returns the new microphone volume in the range of |0, 255]. 1395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // When the volume does not need to be updated, it returns 0. 1405d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int ProcessData(webrtc::AudioFrame* audio_frame, 1415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::TimeDelta capture_delay, 1425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) int volume, 1435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool key_pressed); 144f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 145f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Called when the processor is going away. 146f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) void StopAudioProcessing(); 147f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 148f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Cached value for the render delay latency. This member is accessed by 149f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // both the capture audio thread and the render audio thread. 150f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::subtle::Atomic32 render_delay_ms_; 151f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 152f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // webrtc::AudioProcessing module which does AEC, AGC, NS, HighPass filter, 153f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // ..etc. 154f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<webrtc::AudioProcessing> audio_processing_; 155f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 156f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Converter used for the down-mixing and resampling of the capture data. 157f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<MediaStreamAudioConverter> capture_converter_; 158f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 159f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // AudioFrame used to hold the output of |capture_converter_|. 160f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) webrtc::AudioFrame capture_frame_; 161f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 162f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Converter used for the down-mixing and resampling of the render data when 163f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the AEC is enabled. 164f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<MediaStreamAudioConverter> render_converter_; 165f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 166f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // AudioFrame used to hold the output of |render_converter_|. 167f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) webrtc::AudioFrame render_frame_; 168f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 169f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Data bus to help converting interleaved data to an AudioBus. 170f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) scoped_ptr<media::AudioBus> render_data_bus_; 171f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 172a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Raw pointer to the WebRtcPlayoutDataSource, which is valid for the 173a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // lifetime of RenderThread. 174a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) WebRtcPlayoutDataSource* const playout_data_source_; 175a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 176a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Used to DCHECK that the destructor is called on the main render thread. 177f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker main_thread_checker_; 178f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 179f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Used to DCHECK that some methods are called on the capture audio thread. 180f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker capture_thread_checker_; 181f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 182f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Used to DCHECK that PushRenderData() is called on the render audio thread. 183f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::ThreadChecker render_thread_checker_; 1845d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1855d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Flag to enable the stereo channels mirroring. 1865d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool audio_mirroring_; 187a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 188a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Used by the typing detection. 189a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) scoped_ptr<webrtc::TypingDetection> typing_detector_; 190a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 191a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // This flag is used to show the result of typing detection. 192a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // It can be accessed by the capture audio thread and by the libjingle thread 193a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // which calls GetStats(). 194a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::subtle::Atomic32 typing_detected_; 195f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)}; 196f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 197f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} // namespace content 198f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 199f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_H_ 200