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/*
* Copyright (C) 2011 Ericsson AB. All rights reserved.
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "platform/mediastream/MediaStreamComponent.h"
#include "platform/UUID.h"
#include "platform/audio/AudioBus.h"
#include "platform/mediastream/MediaStreamSource.h"
#include "public/platform/WebAudioSourceProvider.h"
namespace blink {
MediaStreamComponent* MediaStreamComponent::create(MediaStreamSource* source)
{
return new MediaStreamComponent(createCanonicalUUIDString(), source);
}
MediaStreamComponent* MediaStreamComponent::create(const String& id, MediaStreamSource* source)
{
return new MediaStreamComponent(id, source);
}
MediaStreamComponent::MediaStreamComponent(const String& id, MediaStreamSource* source)
: m_source(source)
, m_id(id)
, m_enabled(true)
, m_muted(false)
{
ASSERT(m_id.length());
ThreadState::current()->registerPreFinalizer(this);
}
void MediaStreamComponent::dispose()
{
m_extraData.clear();
}
#if ENABLE(WEB_AUDIO)
void MediaStreamComponent::AudioSourceProviderImpl::wrap(WebAudioSourceProvider* provider)
{
MutexLocker locker(m_provideInputLock);
m_webAudioSourceProvider = provider;
}
void MediaStreamComponent::AudioSourceProviderImpl::provideInput(AudioBus* bus, size_t framesToProcess)
{
ASSERT(bus);
if (!bus)
return;
MutexTryLocker tryLocker(m_provideInputLock);
if (!tryLocker.locked() || !m_webAudioSourceProvider) {
bus->zero();
return;
}
// Wrap the AudioBus channel data using WebVector.
size_t n = bus->numberOfChannels();
WebVector<float*> webAudioData(n);
for (size_t i = 0; i < n; ++i)
webAudioData[i] = bus->channel(i)->mutableData();
m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess);
}
#endif // #if ENABLE(WEB_AUDIO)
DEFINE_TRACE(MediaStreamComponent)
{
visitor->trace(m_source);
}
} // namespace blink
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