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/*
* Copyright (C) 2011, 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "modules/webaudio/AsyncAudioDecoder.h"
#include "core/dom/DOMArrayBuffer.h"
#include "modules/webaudio/AbstractAudioContext.h"
#include "modules/webaudio/AudioBuffer.h"
#include "modules/webaudio/AudioBufferCallback.h"
#include "platform/Task.h"
#include "platform/ThreadSafeFunctional.h"
#include "platform/audio/AudioBus.h"
#include "platform/audio/AudioFileReader.h"
#include "public/platform/Platform.h"
#include "public/platform/WebTraceLocation.h"
#include "wtf/MainThread.h"
#include "wtf/PassOwnPtr.h"
namespace blink {
AsyncAudioDecoder::AsyncAudioDecoder()
: m_thread(adoptPtr(Platform::current()->createThread("Audio Decoder")))
{
}
AsyncAudioDecoder::~AsyncAudioDecoder()
{
}
void AsyncAudioDecoder::decodeAsync(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, AbstractAudioContext* context)
{
ASSERT(isMainThread());
ASSERT(audioData);
if (!audioData)
return;
// Add a ref to keep audioData alive until completion of decoding.
RefPtr<DOMArrayBuffer> audioDataRef(audioData);
// The leak references to successCallback and errorCallback are picked up on notifyComplete.
m_thread->taskRunner()->postTask(BLINK_FROM_HERE, new Task(threadSafeBind(&AsyncAudioDecoder::decode, AllowCrossThreadAccess(audioDataRef.release().leakRef()), sampleRate, successCallback, errorCallback, resolver, context)));
}
void AsyncAudioDecoder::decode(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, AbstractAudioContext* context)
{
RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(audioData->data(), audioData->byteLength(), false, sampleRate);
// Decoding is finished, but we need to do the callbacks on the main thread.
// The leaked reference to audioBuffer is picked up in notifyComplete.
Platform::current()->mainThread()->taskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AsyncAudioDecoder::notifyComplete, AllowCrossThreadAccess(audioData), successCallback, errorCallback, bus.release().leakRef(), resolver, context));
}
void AsyncAudioDecoder::notifyComplete(DOMArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus* audioBus, ScriptPromiseResolver* resolver, AbstractAudioContext* context)
{
ASSERT(isMainThread());
// Adopt references, so everything gets correctly dereffed.
RefPtr<DOMArrayBuffer> audioDataRef = adoptRef(audioData);
RefPtr<AudioBus> audioBusRef = adoptRef(audioBus);
AudioBuffer* audioBuffer = AudioBuffer::createFromAudioBus(audioBus);
// Let the context finish the notification.
context->handleDecodeAudioData(audioBuffer, resolver, successCallback, errorCallback);
}
} // namespace blink
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