1 /* 2 * Copyright (C) 2012 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 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * 3. Neither the name of Google Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * 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 #include "platform/mediastream/MediaStreamSource.h" 33 34 35 namespace blink { 36 37 PassRefPtr<MediaStreamSource> MediaStreamSource::create(const String& id, Type type, const String& name, ReadyState readyState, bool requiresConsumer) 38 { 39 return adoptRef(new MediaStreamSource(id, type, name, readyState, requiresConsumer)); 40 } 41 42 MediaStreamSource::MediaStreamSource(const String& id, Type type, const String& name, ReadyState readyState, bool requiresConsumer) 43 : m_id(id) 44 , m_type(type) 45 , m_name(name) 46 , m_readyState(readyState) 47 , m_requiresConsumer(requiresConsumer) 48 { 49 } 50 51 void MediaStreamSource::setReadyState(ReadyState readyState) 52 { 53 if (m_readyState != ReadyStateEnded && m_readyState != readyState) { 54 m_readyState = readyState; 55 for (Vector<Observer*>::iterator i = m_observers.begin(); i != m_observers.end(); ++i) 56 (*i)->sourceChangedState(); 57 } 58 } 59 60 void MediaStreamSource::addObserver(MediaStreamSource::Observer* observer) 61 { 62 m_observers.append(observer); 63 } 64 65 void MediaStreamSource::removeObserver(MediaStreamSource::Observer* observer) 66 { 67 size_t pos = m_observers.find(observer); 68 if (pos != kNotFound) 69 m_observers.remove(pos); 70 } 71 72 void MediaStreamSource::addAudioConsumer(AudioDestinationConsumer* consumer) 73 { 74 ASSERT(m_requiresConsumer); 75 MutexLocker locker(m_audioConsumersLock); 76 m_audioConsumers.add(consumer); 77 } 78 79 bool MediaStreamSource::removeAudioConsumer(AudioDestinationConsumer* consumer) 80 { 81 ASSERT(m_requiresConsumer); 82 MutexLocker locker(m_audioConsumersLock); 83 HeapHashSet<Member<AudioDestinationConsumer> >::iterator it = m_audioConsumers.find(consumer); 84 if (it == m_audioConsumers.end()) 85 return false; 86 m_audioConsumers.remove(it); 87 return true; 88 } 89 90 void MediaStreamSource::setAudioFormat(size_t numberOfChannels, float sampleRate) 91 { 92 ASSERT(m_requiresConsumer); 93 MutexLocker locker(m_audioConsumersLock); 94 for (HeapHashSet<Member<AudioDestinationConsumer> >::iterator it = m_audioConsumers.begin(); it != m_audioConsumers.end(); ++it) 95 (*it)->setFormat(numberOfChannels, sampleRate); 96 } 97 98 void MediaStreamSource::consumeAudio(AudioBus* bus, size_t numberOfFrames) 99 { 100 ASSERT(m_requiresConsumer); 101 MutexLocker locker(m_audioConsumersLock); 102 for (HeapHashSet<Member<AudioDestinationConsumer> >::iterator it = m_audioConsumers.begin(); it != m_audioConsumers.end(); ++it) 103 (*it)->consumeAudio(bus, numberOfFrames); 104 } 105 106 } // namespace blink 107