third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp

   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, bool remote, bool readonly, ReadyState readyState, bool requiresConsumer)
  38 {
  39     return adoptRef(new MediaStreamSource(id, type, name, remote, readonly, readyState, requiresConsumer));
  40 }
  41
  42 MediaStreamSource::MediaStreamSource(const String& id, Type type, const String& name, bool remote, bool readonly, ReadyState readyState, bool requiresConsumer)
  43     : m_id(id)
  44     , m_type(type)
  45     , m_name(name)
  46     , m_remote(remote)
  47     , m_readonly(readonly)
  48     , m_readyState(readyState)
  49     , m_requiresConsumer(requiresConsumer)
  50 {
  51 }
  52
  53 void MediaStreamSource::setReadyState(ReadyState readyState)
  54 {
  55     if (m_readyState != ReadyStateEnded && m_readyState != readyState) {
  56         m_readyState = readyState;
  57         for (Vector<Observer*>::iterator i = m_observers.begin(); i != m_observers.end(); ++i)
  58             (*i)->sourceChangedState();
  59     }
  60 }
  61
  62 void MediaStreamSource::addObserver(MediaStreamSource::Observer* observer)
  63 {
  64     m_observers.append(observer);
  65 }
  66
  67 void MediaStreamSource::removeObserver(MediaStreamSource::Observer* observer)
  68 {
  69     size_t pos = m_observers.find(observer);
  70     if (pos != kNotFound)
  71         m_observers.remove(pos);
  72 }
  73
  74 void MediaStreamSource::addAudioConsumer(AudioDestinationConsumer* consumer)
  75 {
  76     ASSERT(m_requiresConsumer);
  77     MutexLocker locker(m_audioConsumersLock);
  78     m_audioConsumers.add(consumer);
  79 }
  80
  81 bool MediaStreamSource::removeAudioConsumer(AudioDestinationConsumer* consumer)
  82 {
  83     ASSERT(m_requiresConsumer);
  84     MutexLocker locker(m_audioConsumersLock);
  85     HeapHashSet<Member<AudioDestinationConsumer>>::iterator it = m_audioConsumers.find(consumer);
  86     if (it == m_audioConsumers.end())
  87         return false;
  88     m_audioConsumers.remove(it);
  89     return true;
  90 }
  91
  92 void MediaStreamSource::setAudioFormat(size_t numberOfChannels, float sampleRate)
  93 {
  94     ASSERT(m_requiresConsumer);
  95     MutexLocker locker(m_audioConsumersLock);
  96     for (HeapHashSet<Member<AudioDestinationConsumer>>::iterator it = m_audioConsumers.begin(); it != m_audioConsumers.end(); ++it)
  97         (*it)->setFormat(numberOfChannels, sampleRate);
  98 }
  99
 100 void MediaStreamSource::consumeAudio(AudioBus* bus, size_t numberOfFrames)
 101 {
 102     ASSERT(m_requiresConsumer);
 103     MutexLocker locker(m_audioConsumersLock);
 104     for (HeapHashSet<Member<AudioDestinationConsumer>>::iterator it = m_audioConsumers.begin(); it != m_audioConsumers.end(); ++it)
 105         (*it)->consumeAudio(bus, numberOfFrames);
 106 }
 107
 108 } // namespace blink