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