1/*
2 * Copyright (C) 2011, 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 * 1.  Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef AsyncAudioDecoder_h
26#define AsyncAudioDecoder_h
27
28#include "platform/heap/Handle.h"
29#include "public/platform/WebThread.h"
30#include "wtf/Forward.h"
31#include "wtf/OwnPtr.h"
32
33namespace blink {
34
35class AudioBuffer;
36class AudioBufferCallback;
37class AudioBus;
38
39// AsyncAudioDecoder asynchronously decodes audio file data from an ArrayBuffer in a worker thread.
40// Upon successful decoding, a completion callback will be invoked with the decoded PCM data in an AudioBuffer.
41
42class AsyncAudioDecoder {
43    WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder);
44public:
45    AsyncAudioDecoder();
46    ~AsyncAudioDecoder();
47
48    // Must be called on the main thread.
49    void decodeAsync(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback);
50
51private:
52    AudioBuffer* createAudioBufferFromAudioBus(AudioBus*);
53    static void decode(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback);
54    static void notifyComplete(ArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus*);
55
56    OwnPtr<WebThread> m_thread;
57};
58
59} // namespace blink
60
61#endif // AsyncAudioDecoder_h
62