1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 33 #include "public/platform/WebMediaStreamSource.h" 34 35 #include "platform/audio/AudioBus.h" 36 #include "platform/mediastream/MediaStreamSource.h" 37 #include "public/platform/WebAudioDestinationConsumer.h" 38 #include "public/platform/WebMediaConstraints.h" 39 #include "public/platform/WebString.h" 40 #include "wtf/MainThread.h" 41 #include "wtf/PassOwnPtr.h" 42 #include "wtf/Vector.h" 43 44 namespace blink { 45 46 namespace { 47 48 class ExtraDataContainer : public MediaStreamSource::ExtraData { 49 public: 50 ExtraDataContainer(PassOwnPtr<WebMediaStreamSource::ExtraData> extraData) : m_extraData(extraData) { } 51 52 WebMediaStreamSource::ExtraData* extraData() { return m_extraData.get(); } 53 54 private: 55 OwnPtr<WebMediaStreamSource::ExtraData> m_extraData; 56 }; 57 58 } // namespace 59 60 WebMediaStreamSource WebMediaStreamSource::ExtraData::owner() 61 { 62 ASSERT(m_owner); 63 return WebMediaStreamSource(m_owner); 64 } 65 66 void WebMediaStreamSource::ExtraData::setOwner(MediaStreamSource* owner) 67 { 68 ASSERT(!m_owner); 69 m_owner = owner; 70 } 71 72 WebMediaStreamSource::WebMediaStreamSource(const PassRefPtr<MediaStreamSource>& mediaStreamSource) 73 : m_private(mediaStreamSource) 74 { 75 } 76 77 WebMediaStreamSource& WebMediaStreamSource::operator=(MediaStreamSource* mediaStreamSource) 78 { 79 m_private = mediaStreamSource; 80 return *this; 81 } 82 83 void WebMediaStreamSource::assign(const WebMediaStreamSource& other) 84 { 85 m_private = other.m_private; 86 } 87 88 void WebMediaStreamSource::reset() 89 { 90 m_private.reset(); 91 } 92 93 WebMediaStreamSource::operator PassRefPtr<MediaStreamSource>() const 94 { 95 return m_private.get(); 96 } 97 98 WebMediaStreamSource::operator MediaStreamSource*() const 99 { 100 return m_private.get(); 101 } 102 103 void WebMediaStreamSource::initialize(const WebString& id, Type type, const WebString& name) 104 { 105 m_private = MediaStreamSource::create(id, static_cast<MediaStreamSource::Type>(type), name); 106 } 107 108 WebString WebMediaStreamSource::id() const 109 { 110 ASSERT(!m_private.isNull()); 111 return m_private.get()->id(); 112 } 113 114 WebMediaStreamSource::Type WebMediaStreamSource::type() const 115 { 116 ASSERT(!m_private.isNull()); 117 return static_cast<Type>(m_private.get()->type()); 118 } 119 120 WebString WebMediaStreamSource::name() const 121 { 122 ASSERT(!m_private.isNull()); 123 return m_private.get()->name(); 124 } 125 126 void WebMediaStreamSource::setReadyState(ReadyState state) 127 { 128 ASSERT(!m_private.isNull()); 129 m_private->setReadyState(static_cast<MediaStreamSource::ReadyState>(state)); 130 } 131 132 WebMediaStreamSource::ReadyState WebMediaStreamSource::readyState() const 133 { 134 ASSERT(!m_private.isNull()); 135 return static_cast<ReadyState>(m_private->readyState()); 136 } 137 138 WebMediaStreamSource::ExtraData* WebMediaStreamSource::extraData() const 139 { 140 ASSERT(!m_private.isNull()); 141 MediaStreamSource::ExtraData* data = m_private->extraData(); 142 if (!data) 143 return 0; 144 return static_cast<ExtraDataContainer*>(data)->extraData(); 145 } 146 147 void WebMediaStreamSource::setExtraData(ExtraData* extraData) 148 { 149 ASSERT(!m_private.isNull()); 150 151 if (extraData) 152 extraData->setOwner(m_private.get()); 153 154 m_private->setExtraData(adoptPtr(new ExtraDataContainer(adoptPtr(extraData)))); 155 } 156 157 WebMediaConstraints WebMediaStreamSource::constraints() 158 { 159 ASSERT(!m_private.isNull()); 160 return m_private->constraints(); 161 } 162 163 bool WebMediaStreamSource::requiresAudioConsumer() const 164 { 165 ASSERT(!m_private.isNull()); 166 return m_private->requiresAudioConsumer(); 167 } 168 169 class ConsumerWrapper FINAL : public AudioDestinationConsumer { 170 public: 171 static ConsumerWrapper* create(WebAudioDestinationConsumer* consumer) 172 { 173 return new ConsumerWrapper(consumer); 174 } 175 176 virtual void setFormat(size_t numberOfChannels, float sampleRate) OVERRIDE; 177 virtual void consumeAudio(AudioBus*, size_t numberOfFrames) OVERRIDE; 178 179 WebAudioDestinationConsumer* consumer() { return m_consumer; } 180 181 private: 182 explicit ConsumerWrapper(WebAudioDestinationConsumer* consumer) : m_consumer(consumer) { } 183 184 // m_consumer is not owned by this class. 185 WebAudioDestinationConsumer* m_consumer; 186 }; 187 188 void ConsumerWrapper::setFormat(size_t numberOfChannels, float sampleRate) 189 { 190 m_consumer->setFormat(numberOfChannels, sampleRate); 191 } 192 193 void ConsumerWrapper::consumeAudio(AudioBus* bus, size_t numberOfFrames) 194 { 195 if (!bus) 196 return; 197 198 // Wrap AudioBus. 199 size_t numberOfChannels = bus->numberOfChannels(); 200 WebVector<const float*> busVector(numberOfChannels); 201 for (size_t i = 0; i < numberOfChannels; ++i) 202 busVector[i] = bus->channel(i)->data(); 203 204 m_consumer->consumeAudio(busVector, numberOfFrames); 205 } 206 207 void WebMediaStreamSource::addAudioConsumer(WebAudioDestinationConsumer* consumer) 208 { 209 ASSERT(isMainThread()); 210 ASSERT(!m_private.isNull() && consumer); 211 212 m_private->addAudioConsumer(ConsumerWrapper::create(consumer)); 213 } 214 215 bool WebMediaStreamSource::removeAudioConsumer(WebAudioDestinationConsumer* consumer) 216 { 217 ASSERT(isMainThread()); 218 ASSERT(!m_private.isNull() && consumer); 219 220 const HeapHashSet<Member<AudioDestinationConsumer> >& consumers = m_private->audioConsumers(); 221 for (HeapHashSet<Member<AudioDestinationConsumer> >::const_iterator it = consumers.begin(); it != consumers.end(); ++it) { 222 ConsumerWrapper* wrapper = static_cast<ConsumerWrapper*>(it->get()); 223 if (wrapper->consumer() == consumer) { 224 m_private->removeAudioConsumer(wrapper); 225 return true; 226 } 227 } 228 return false; 229 } 230 231 } // namespace blink 232
