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      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