1/* 2 * libjingle 3 * Copyright 2014 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "talk/app/webrtc/remoteaudiosource.h" 29 30#include <algorithm> 31#include <functional> 32#include <utility> 33 34#include "talk/app/webrtc/mediastreamprovider.h" 35#include "webrtc/base/checks.h" 36#include "webrtc/base/logging.h" 37#include "webrtc/base/thread.h" 38 39namespace webrtc { 40 41class RemoteAudioSource::MessageHandler : public rtc::MessageHandler { 42 public: 43 explicit MessageHandler(RemoteAudioSource* source) : source_(source) {} 44 45 private: 46 ~MessageHandler() override {} 47 48 void OnMessage(rtc::Message* msg) override { 49 source_->OnMessage(msg); 50 delete this; 51 } 52 53 const rtc::scoped_refptr<RemoteAudioSource> source_; 54 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(MessageHandler); 55}; 56 57class RemoteAudioSource::Sink : public AudioSinkInterface { 58 public: 59 explicit Sink(RemoteAudioSource* source) : source_(source) {} 60 ~Sink() override { source_->OnAudioProviderGone(); } 61 62 private: 63 void OnData(const AudioSinkInterface::Data& audio) override { 64 if (source_) 65 source_->OnData(audio); 66 } 67 68 const rtc::scoped_refptr<RemoteAudioSource> source_; 69 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Sink); 70}; 71 72rtc::scoped_refptr<RemoteAudioSource> RemoteAudioSource::Create( 73 uint32_t ssrc, 74 AudioProviderInterface* provider) { 75 rtc::scoped_refptr<RemoteAudioSource> ret( 76 new rtc::RefCountedObject<RemoteAudioSource>()); 77 ret->Initialize(ssrc, provider); 78 return ret; 79} 80 81RemoteAudioSource::RemoteAudioSource() 82 : main_thread_(rtc::Thread::Current()), 83 state_(MediaSourceInterface::kLive) { 84 RTC_DCHECK(main_thread_); 85} 86 87RemoteAudioSource::~RemoteAudioSource() { 88 RTC_DCHECK(main_thread_->IsCurrent()); 89 RTC_DCHECK(audio_observers_.empty()); 90 RTC_DCHECK(sinks_.empty()); 91} 92 93void RemoteAudioSource::Initialize(uint32_t ssrc, 94 AudioProviderInterface* provider) { 95 RTC_DCHECK(main_thread_->IsCurrent()); 96 // To make sure we always get notified when the provider goes out of scope, 97 // we register for callbacks here and not on demand in AddSink. 98 if (provider) { // May be null in tests. 99 provider->SetRawAudioSink( 100 ssrc, rtc::scoped_ptr<AudioSinkInterface>(new Sink(this))); 101 } 102} 103 104MediaSourceInterface::SourceState RemoteAudioSource::state() const { 105 RTC_DCHECK(main_thread_->IsCurrent()); 106 return state_; 107} 108 109bool RemoteAudioSource::remote() const { 110 RTC_DCHECK(main_thread_->IsCurrent()); 111 return true; 112} 113 114void RemoteAudioSource::SetVolume(double volume) { 115 RTC_DCHECK(volume >= 0 && volume <= 10); 116 for (auto* observer : audio_observers_) 117 observer->OnSetVolume(volume); 118} 119 120void RemoteAudioSource::RegisterAudioObserver(AudioObserver* observer) { 121 RTC_DCHECK(observer != NULL); 122 RTC_DCHECK(std::find(audio_observers_.begin(), audio_observers_.end(), 123 observer) == audio_observers_.end()); 124 audio_observers_.push_back(observer); 125} 126 127void RemoteAudioSource::UnregisterAudioObserver(AudioObserver* observer) { 128 RTC_DCHECK(observer != NULL); 129 audio_observers_.remove(observer); 130} 131 132void RemoteAudioSource::AddSink(AudioTrackSinkInterface* sink) { 133 RTC_DCHECK(main_thread_->IsCurrent()); 134 RTC_DCHECK(sink); 135 136 if (state_ != MediaSourceInterface::kLive) { 137 LOG(LS_ERROR) << "Can't register sink as the source isn't live."; 138 return; 139 } 140 141 rtc::CritScope lock(&sink_lock_); 142 RTC_DCHECK(std::find(sinks_.begin(), sinks_.end(), sink) == sinks_.end()); 143 sinks_.push_back(sink); 144} 145 146void RemoteAudioSource::RemoveSink(AudioTrackSinkInterface* sink) { 147 RTC_DCHECK(main_thread_->IsCurrent()); 148 RTC_DCHECK(sink); 149 150 rtc::CritScope lock(&sink_lock_); 151 sinks_.remove(sink); 152} 153 154void RemoteAudioSource::OnData(const AudioSinkInterface::Data& audio) { 155 // Called on the externally-owned audio callback thread, via/from webrtc. 156 rtc::CritScope lock(&sink_lock_); 157 for (auto* sink : sinks_) { 158 sink->OnData(audio.data, 16, audio.sample_rate, audio.channels, 159 audio.samples_per_channel); 160 } 161} 162 163void RemoteAudioSource::OnAudioProviderGone() { 164 // Called when the data provider is deleted. It may be the worker thread 165 // in libjingle or may be a different worker thread. 166 main_thread_->Post(new MessageHandler(this)); 167} 168 169void RemoteAudioSource::OnMessage(rtc::Message* msg) { 170 RTC_DCHECK(main_thread_->IsCurrent()); 171 sinks_.clear(); 172 state_ = MediaSourceInterface::kEnded; 173 FireOnChanged(); 174} 175 176} // namespace webrtc 177