third_party/WebKit/Source/modules/webaudio/AsyncAudioDecoder.h

/*
 * 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.
 */

#ifndef AsyncAudioDecoder_h
#define AsyncAudioDecoder_h

#include "platform/heap/Handle.h"
#include "public/platform/WebThread.h"
#include "wtf/OwnPtr.h"
#include "wtf/build_config.h"

namespace blink {

class AbstractAudioContext;
class AudioBuffer;
class AudioBufferCallback;
class AudioBus;
class DOMArrayBuffer;
class ScriptPromiseResolver;

// AsyncAudioDecoder asynchronously decodes audio file data from a DOMArrayBuffer in a worker thread.
// Upon successful decoding, a completion callback will be invoked with the decoded PCM data in an AudioBuffer.

class AsyncAudioDecoder {
    DISALLOW_NEW();
    WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder);
public:
    AsyncAudioDecoder();
    ~AsyncAudioDecoder();

    // Must be called on the main thread.  |decodeAsync| and callees must not modify any of the
    // parameters except |audioData|.  They are used to associate this decoding instance with the
    // caller to process the decoding appropriately when finished.
    void decodeAsync(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* , AbstractAudioContext*);

private:
    AudioBuffer* createAudioBufferFromAudioBus(AudioBus*);
    static void decode(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver*, AbstractAudioContext*);
    static void notifyComplete(DOMArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus*, ScriptPromiseResolver*, AbstractAudioContext*);

    OwnPtr<WebThread> m_thread;
};

} // namespace blink

#endif // AsyncAudioDecoder_h