third_party/WebKit/Source/platform/exported/WebMediaStreamSource.cpp

   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
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   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,
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  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, false, true);
 106 }
 107
 108 void WebMediaStreamSource::initialize(const WebString& id, Type type, const WebString& name, bool remote, bool readonly)
 109 {
 110     m_private = MediaStreamSource::create(id, static_cast<MediaStreamSource::Type>(type), name, remote, readonly);
 111 }
 112
 113 WebString WebMediaStreamSource::id() const
 114 {
 115     ASSERT(!m_private.isNull());
 116     return m_private.get()->id();
 117 }
 118
 119 WebMediaStreamSource::Type WebMediaStreamSource::type() const
 120 {
 121     ASSERT(!m_private.isNull());
 122     return static_cast<Type>(m_private.get()->type());
 123 }
 124
 125 WebString WebMediaStreamSource::name() const
 126 {
 127     ASSERT(!m_private.isNull());
 128     return m_private.get()->name();
 129 }
 130
 131 bool WebMediaStreamSource::remote() const
 132 {
 133     ASSERT(!m_private.isNull());
 134     return m_private.get()->remote();
 135 }
 136
 137 void WebMediaStreamSource::setReadyState(ReadyState state)
 138 {
 139     ASSERT(!m_private.isNull());
 140     m_private->setReadyState(static_cast<MediaStreamSource::ReadyState>(state));
 141 }
 142
 143 WebMediaStreamSource::ReadyState WebMediaStreamSource::readyState() const
 144 {
 145     ASSERT(!m_private.isNull());
 146     return static_cast<ReadyState>(m_private->readyState());
 147 }
 148
 149 WebMediaStreamSource::ExtraData* WebMediaStreamSource::extraData() const
 150 {
 151     ASSERT(!m_private.isNull());
 152     MediaStreamSource::ExtraData* data = m_private->extraData();
 153     if (!data)
 154         return 0;
 155     return static_cast<ExtraDataContainer*>(data)->extraData();
 156 }
 157
 158 void WebMediaStreamSource::setExtraData(ExtraData* extraData)
 159 {
 160     ASSERT(!m_private.isNull());
 161
 162     if (extraData)
 163         extraData->setOwner(m_private.get());
 164
 165     m_private->setExtraData(adoptPtr(new ExtraDataContainer(adoptPtr(extraData))));
 166 }
 167
 168 WebMediaConstraints WebMediaStreamSource::constraints()
 169 {
 170     ASSERT(!m_private.isNull());
 171     return m_private->constraints();
 172 }
 173
 174 bool WebMediaStreamSource::requiresAudioConsumer() const
 175 {
 176     ASSERT(!m_private.isNull());
 177     return m_private->requiresAudioConsumer();
 178 }
 179
 180 class ConsumerWrapper final : public AudioDestinationConsumer {
 181 public:
 182     static ConsumerWrapper* create(WebAudioDestinationConsumer* consumer)
 183     {
 184         return new ConsumerWrapper(consumer);
 185     }
 186
 187     void setFormat(size_t numberOfChannels, float sampleRate) override;
 188     void consumeAudio(AudioBus*, size_t numberOfFrames) override;
 189
 190     WebAudioDestinationConsumer* consumer() { return m_consumer; }
 191
 192 private:
 193     explicit ConsumerWrapper(WebAudioDestinationConsumer* consumer) : m_consumer(consumer) { }
 194
 195     // m_consumer is not owned by this class.
 196     WebAudioDestinationConsumer* m_consumer;
 197 };
 198
 199 void ConsumerWrapper::setFormat(size_t numberOfChannels, float sampleRate)
 200 {
 201     m_consumer->setFormat(numberOfChannels, sampleRate);
 202 }
 203
 204 void ConsumerWrapper::consumeAudio(AudioBus* bus, size_t numberOfFrames)
 205 {
 206     if (!bus)
 207         return;
 208
 209     // Wrap AudioBus.
 210     size_t numberOfChannels = bus->numberOfChannels();
 211     WebVector<const float*> busVector(numberOfChannels);
 212     for (size_t i = 0; i < numberOfChannels; ++i)
 213         busVector[i] = bus->channel(i)->data();
 214
 215     m_consumer->consumeAudio(busVector, numberOfFrames);
 216 }
 217
 218 void WebMediaStreamSource::addAudioConsumer(WebAudioDestinationConsumer* consumer)
 219 {
 220     ASSERT(isMainThread());
 221     ASSERT(!m_private.isNull() && consumer);
 222
 223     m_private->addAudioConsumer(ConsumerWrapper::create(consumer));
 224 }
 225
 226 bool WebMediaStreamSource::removeAudioConsumer(WebAudioDestinationConsumer* consumer)
 227 {
 228     ASSERT(isMainThread());
 229     ASSERT(!m_private.isNull() && consumer);
 230
 231     const HeapHashSet<Member<AudioDestinationConsumer>>& consumers = m_private->audioConsumers();
 232     for (HeapHashSet<Member<AudioDestinationConsumer>>::const_iterator it = consumers.begin(); it != consumers.end(); ++it) {
 233         ConsumerWrapper* wrapper = static_cast<ConsumerWrapper*>(it->get());
 234         if (wrapper->consumer() == consumer) {
 235             m_private->removeAudioConsumer(wrapper);
 236             return true;
 237         }
 238     }
 239     return false;
 240 }
 241
 242 } // namespace blink