audio_output_controller.cc revision 868fa2fe829687343ffae624259930155e16dbd8
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_output_controller.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/debug/trace_event.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/message_loop.h" 10a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles)#include "base/metrics/histogram.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/platform_thread.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/time.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "build/build_config.h" 14c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "media/audio/audio_silence_detector.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "media/audio/audio_util.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/shared_memory_util.h" 1790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)#include "media/base/scoped_histogram_timer.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using base::Time; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using base::TimeDelta; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 24c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Amount of contiguous time where all audio is silent before considering the 25c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// stream to have transitioned and EventHandler::OnAudible() should be called. 26c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)static const int kQuestionableSilencePeriodMillis = 50; 27c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 28c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Sample value range below which audio is considered indistinguishably silent. 29c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// 30c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// TODO(miu): This value should be specified in dbFS units rather than full 31c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// scale. See TODO in audio_silence_detector.h. 32c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)static const float kIndistinguishableSilenceThreshold = 33c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1.0f / 4096.0f; // Note: This is approximately -72 dbFS. 34c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Polling-related constants. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int AudioOutputController::kPollNumAttempts = 3; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int AudioOutputController::kPollPauseInMilliseconds = 3; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioOutputController::AudioOutputController(AudioManager* audio_manager, 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EventHandler* handler, 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const AudioParameters& params, 42868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const std::string& input_device_id, 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SyncReader* sync_reader) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : audio_manager_(audio_manager), 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) params_(params), 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) handler_(handler), 47868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) input_device_id_(input_device_id), 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_(NULL), 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) diverting_to_stream_(NULL), 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volume_(1.0), 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_(kEmpty), 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) num_allowed_io_(0), 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sync_reader_(sync_reader), 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_(audio_manager->GetMessageLoop()), 55868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) number_polling_attempts_left_(0) { 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(audio_manager); 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(handler_); 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(sync_reader_); 59868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) DCHECK(message_loop_.get()); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioOutputController::~AudioOutputController() { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(kClosed, state_); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_refptr<AudioOutputController> AudioOutputController::Create( 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AudioManager* audio_manager, 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EventHandler* event_handler, 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const AudioParameters& params, 71868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const std::string& input_device_id, 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SyncReader* sync_reader) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(audio_manager); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(sync_reader); 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!params.IsValid() || !audio_manager) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<AudioOutputController> controller(new AudioOutputController( 80868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) audio_manager, event_handler, params, input_device_id, sync_reader)); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) controller->message_loop_->PostTask(FROM_HERE, base::Bind( 822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) &AudioOutputController::DoCreate, controller, false)); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return controller; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::Play() { 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_->PostTask(FROM_HERE, base::Bind( 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &AudioOutputController::DoPlay, this)); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::Pause() { 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_->PostTask(FROM_HERE, base::Bind( 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &AudioOutputController::DoPause, this)); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::Close(const base::Closure& closed_task) { 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!closed_task.is_null()); 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_->PostTaskAndReply(FROM_HERE, base::Bind( 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &AudioOutputController::DoClose, this), closed_task); 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::SetVolume(double volume) { 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_->PostTask(FROM_HERE, base::Bind( 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &AudioOutputController::DoSetVolume, this, volume)); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoCreate(bool is_for_device_change) { 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 10990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioOutputController.CreateTime"); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Close() can be called before DoCreate() is executed. 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state_ == kClosed) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DoStopCloseAndClearStream(); // Calls RemoveOutputDeviceChangeListener(). 1162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_EQ(kEmpty, state_); 1172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) stream_ = diverting_to_stream_ ? diverting_to_stream_ : 119868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) audio_manager_->MakeAudioOutputStreamProxy(params_, input_device_id_); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!stream_) { 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kError; 122c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnError(); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!stream_->Open()) { 1272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DoStopCloseAndClearStream(); 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kError; 129c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnError(); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Everything started okay, so re-register for state change callbacks if 1342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // stream_ was created via AudioManager. 1352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (stream_ != diverting_to_stream_) 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) audio_manager_->AddOutputDeviceChangeListener(this); 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We have successfully opened the stream. Set the initial volume. 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_->SetVolume(volume_); 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Finally set the state to kCreated. 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kCreated; 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // And then report we have been created if we haven't done so already. 1452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!is_for_device_change) 146c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnCreated(); 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::DoPlay() { 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 151868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioOutputController.PlayTime"); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We can start from created or paused state. 1542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (state_ != kCreated && state_ != kPaused) 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Ask for first packet. 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sync_reader_->UpdatePendingBytes(0); 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kPlaying; 161c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) silence_detector_.reset(new AudioSilenceDetector( 162c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) params_.sample_rate(), 163c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) TimeDelta::FromMilliseconds(kQuestionableSilencePeriodMillis), 164c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) kIndistinguishableSilenceThreshold)); 165c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We start the AudioOutputStream lazily. 1672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AllowEntryToOnMoreIOData(); 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_->Start(this); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 170c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Tell the event handler that we are now playing, and also start the silence 171c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // detection notifications. 172c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnPlaying(); 173c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) silence_detector_->Start( 174c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::Bind(&EventHandler::OnAudible, base::Unretained(handler_))); 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::StopStream() { 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 180868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (state_ == kPlaying) { 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_->Stop(); 1822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DisallowEntryToOnMoreIOData(); 183c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) silence_detector_->Stop(true); 184c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) silence_detector_.reset(); 1852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) state_ = kPaused; 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoPause() { 1902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 19190dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioOutputController.PauseTime"); 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) StopStream(); 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (state_ != kPaused) 1962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return; 1972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Send a special pause mark to the low-latency audio thread. 1992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sync_reader_->UpdatePendingBytes(kPauseMark); 2002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 201c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnPaused(); 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::DoClose() { 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 20690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioOutputController.CloseTime"); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state_ != kClosed) { 2092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DoStopCloseAndClearStream(); 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sync_reader_->Close(); 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kClosed; 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::DoSetVolume(double volume) { 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Saves the volume to a member first. We may not be able to set the volume 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // right away but when the stream is created we'll set the volume. 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volume_ = volume; 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (state_) { 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kCreated: 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kPlaying: 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kPaused: 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_->SetVolume(volume_); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoReportError() { 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state_ != kClosed) 236c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) handler_->OnError(); 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioOutputController::OnMoreData(AudioBus* dest, 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AudioBuffersState buffers_state) { 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return OnMoreIOData(NULL, dest, buffers_state); 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioOutputController::OnMoreIOData(AudioBus* source, 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AudioBus* dest, 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AudioBuffersState buffers_state) { 2472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DisallowEntryToOnMoreIOData(); 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TRACE_EVENT0("audio", "AudioOutputController::OnMoreIOData"); 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // The OS level audio APIs on Linux and Windows all have problems requesting 2512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // data on a fixed interval. Sometimes they will issue calls back to back 252868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // which can cause glitching, so wait until the renderer is ready. 253868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // 254868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // We also need to wait when diverting since the virtual stream will call this 255868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // multiple times without waiting. 256868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // 257868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // NEVER wait on OSX unless a virtual stream is connected, otherwise we can 258868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // end up hanging the entire OS. 2592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // 2602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // See many bugs for context behind this decision: http://crbug.com/170498, 2612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // http://crbug.com/171651, http://crbug.com/174985, and more. 2622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) || defined(OS_LINUX) 263868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const bool kShouldBlock = true; 264868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#else 265868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const bool kShouldBlock = diverting_to_stream_ != NULL; 2662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 2672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 268868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const int frames = sync_reader_->Read(kShouldBlock, source, dest); 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK_LE(0, frames); 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sync_reader_->UpdatePendingBytes( 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffers_state.total_bytes() + frames * params_.GetBytesPerFrame()); 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 273c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) silence_detector_->Scan(dest, frames); 274c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AllowEntryToOnMoreIOData(); 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return frames; 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::OnError(AudioOutputStream* stream) { 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Handle error on the audio controller thread. 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) message_loop_->PostTask(FROM_HERE, base::Bind( 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) &AudioOutputController::DoReportError, this)); 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoStopCloseAndClearStream() { 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allow calling unconditionally and bail if we don't have a stream_ to close. 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (stream_) { 2902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // De-register from state change callbacks if stream_ was created via 2912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // AudioManager. 2922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (stream_ != diverting_to_stream_) 2932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) audio_manager_->RemoveOutputDeviceChangeListener(this); 2942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) StopStream(); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_->Close(); 2972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (stream_ == diverting_to_stream_) 2982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) diverting_to_stream_ = NULL; 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_ = NULL; 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) state_ = kEmpty; 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputController::OnDeviceChange() { 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 30790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioOutputController.DeviceChangeTime"); 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // TODO(dalecurtis): Notify the renderer side that a device change has 3102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // occurred. Currently querying the hardware information here will lead to 3112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // crashes on OSX. See http://crbug.com/158170. 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Recreate the stream (DoCreate() will first shut down an existing stream). 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Exit if we ran into an error. 3152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const State original_state = state_; 3162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DoCreate(true); 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!stream_ || state_ == kError) 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get us back to the original state or an equivalent state. 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (original_state) { 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kPlaying: 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoPlay(); 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kCreated: 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case kPaused: 3272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // From the outside these two states are equivalent. 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Invalid original state."; 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const AudioParameters& AudioOutputController::GetAudioParameters() { 3352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return params_; 3362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::StartDiverting(AudioOutputStream* to_stream) { 3392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) message_loop_->PostTask( 3402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FROM_HERE, 3412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Bind(&AudioOutputController::DoStartDiverting, this, to_stream)); 3422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::StopDiverting() { 3452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) message_loop_->PostTask( 3462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FROM_HERE, base::Bind(&AudioOutputController::DoStopDiverting, this)); 3472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoStartDiverting(AudioOutputStream* to_stream) { 3502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 3512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (state_ == kClosed) 3532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return; 3542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(!diverting_to_stream_); 3562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) diverting_to_stream_ = to_stream; 3572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Note: OnDeviceChange() will engage the "re-create" process, which will 3582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // detect and use the alternate AudioOutputStream rather than create a new one 3592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // via AudioManager. 3602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) OnDeviceChange(); 3612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DoStopDiverting() { 3642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(message_loop_->BelongsToCurrentThread()); 3652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (state_ == kClosed) 3672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return; 3682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Note: OnDeviceChange() will cause the existing stream (the consumer of the 3702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // diverted audio data) to be closed, and diverting_to_stream_ will be set 3712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // back to NULL. 3722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) OnDeviceChange(); 3732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(!diverting_to_stream_); 3742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::AllowEntryToOnMoreIOData() { 3772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(base::AtomicRefCountIsZero(&num_allowed_io_)); 3782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::AtomicRefCountInc(&num_allowed_io_); 3792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioOutputController::DisallowEntryToOnMoreIOData() { 3822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const bool is_zero = !base::AtomicRefCountDec(&num_allowed_io_); 3832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(is_zero); 3842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 387