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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:
ExtraDataContainer(PassOwnPtr<WebMediaStreamSource::ExtraData> extraData)50     ExtraDataContainer(PassOwnPtr<WebMediaStreamSource::ExtraData> extraData) : m_extraData(extraData) { }
51 
extraData()52     WebMediaStreamSource::ExtraData* extraData() { return m_extraData.get(); }
53 
54 private:
55     OwnPtr<WebMediaStreamSource::ExtraData> m_extraData;
56 };
57 
58 } // namespace
59 
owner()60 WebMediaStreamSource WebMediaStreamSource::ExtraData::owner()
61 {
62     ASSERT(m_owner);
63     return WebMediaStreamSource(m_owner);
64 }
65 
setOwner(MediaStreamSource * owner)66 void WebMediaStreamSource::ExtraData::setOwner(MediaStreamSource* owner)
67 {
68     ASSERT(!m_owner);
69     m_owner = owner;
70 }
71 
WebMediaStreamSource(const PassRefPtr<MediaStreamSource> & mediaStreamSource)72 WebMediaStreamSource::WebMediaStreamSource(const PassRefPtr<MediaStreamSource>& mediaStreamSource)
73     : m_private(mediaStreamSource)
74 {
75 }
76 
operator =(MediaStreamSource * mediaStreamSource)77 WebMediaStreamSource& WebMediaStreamSource::operator=(MediaStreamSource* mediaStreamSource)
78 {
79     m_private = mediaStreamSource;
80     return *this;
81 }
82 
assign(const WebMediaStreamSource & other)83 void WebMediaStreamSource::assign(const WebMediaStreamSource& other)
84 {
85     m_private = other.m_private;
86 }
87 
reset()88 void WebMediaStreamSource::reset()
89 {
90     m_private.reset();
91 }
92 
operator PassRefPtr<MediaStreamSource>() const93 WebMediaStreamSource::operator PassRefPtr<MediaStreamSource>() const
94 {
95     return m_private.get();
96 }
97 
operator MediaStreamSource*() const98 WebMediaStreamSource::operator MediaStreamSource*() const
99 {
100     return m_private.get();
101 }
102 
initialize(const WebString & id,Type type,const WebString & name)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 
id() const108 WebString WebMediaStreamSource::id() const
109 {
110     ASSERT(!m_private.isNull());
111     return m_private.get()->id();
112 }
113 
type() const114 WebMediaStreamSource::Type WebMediaStreamSource::type() const
115 {
116     ASSERT(!m_private.isNull());
117     return static_cast<Type>(m_private.get()->type());
118 }
119 
name() const120 WebString WebMediaStreamSource::name() const
121 {
122     ASSERT(!m_private.isNull());
123     return m_private.get()->name();
124 }
125 
setReadyState(ReadyState state)126 void WebMediaStreamSource::setReadyState(ReadyState state)
127 {
128     ASSERT(!m_private.isNull());
129     m_private->setReadyState(static_cast<MediaStreamSource::ReadyState>(state));
130 }
131 
readyState() const132 WebMediaStreamSource::ReadyState WebMediaStreamSource::readyState() const
133 {
134     ASSERT(!m_private.isNull());
135     return static_cast<ReadyState>(m_private->readyState());
136 }
137 
extraData() const138 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 
setExtraData(ExtraData * extraData)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 
constraints()157 WebMediaConstraints WebMediaStreamSource::constraints()
158 {
159     ASSERT(!m_private.isNull());
160     return m_private->constraints();
161 }
162 
requiresAudioConsumer() const163 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:
create(WebAudioDestinationConsumer * consumer)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 
consumer()179     WebAudioDestinationConsumer* consumer() { return m_consumer; }
180 
181 private:
ConsumerWrapper(WebAudioDestinationConsumer * consumer)182     explicit ConsumerWrapper(WebAudioDestinationConsumer* consumer) : m_consumer(consumer) { }
183 
184     // m_consumer is not owned by this class.
185     WebAudioDestinationConsumer* m_consumer;
186 };
187 
setFormat(size_t numberOfChannels,float sampleRate)188 void ConsumerWrapper::setFormat(size_t numberOfChannels, float sampleRate)
189 {
190     m_consumer->setFormat(numberOfChannels, sampleRate);
191 }
192 
consumeAudio(AudioBus * bus,size_t numberOfFrames)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 
addAudioConsumer(WebAudioDestinationConsumer * consumer)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 
removeAudioConsumer(WebAudioDestinationConsumer * consumer)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