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#pragma once
26
27#include <memory>
28#include <wtf/Forward.h>
29#include <wtf/MessageQueue.h>
30#include <wtf/RefPtr.h>
31#include <wtf/Threading.h>
32
33namespace JSC {
34class ArrayBuffer;
35}
36
37namespace WebCore {
38
39class AudioBuffer;
40class AudioBufferCallback;
41
42// AsyncAudioDecoder asynchronously decodes audio file data from an ArrayBuffer in a worker thread.
43// Upon successful decoding, a completion callback will be invoked with the decoded PCM data in an AudioBuffer.
44
45class AsyncAudioDecoder {
46 WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder);
47public:
48 AsyncAudioDecoder();
49 ~AsyncAudioDecoder();
50
51 // Must be called on the main thread.
52 void decodeAsync(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, RefPtr<AudioBufferCallback>&& successCallback, RefPtr<AudioBufferCallback>&& errorCallback);
53
54private:
55 class DecodingTask {
56 WTF_MAKE_NONCOPYABLE(DecodingTask);
57 WTF_MAKE_FAST_ALLOCATED;
58 public:
59 DecodingTask(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, RefPtr<AudioBufferCallback>&& successCallback, RefPtr<AudioBufferCallback>&& errorCallback);
60 void decode();
61
62 private:
63 JSC::ArrayBuffer& audioData() { return m_audioData; }
64 float sampleRate() const { return m_sampleRate; }
65 AudioBufferCallback* successCallback() { return m_successCallback.get(); }
66 AudioBufferCallback* errorCallback() { return m_errorCallback.get(); }
67 AudioBuffer* audioBuffer() { return m_audioBuffer.get(); }
68
69 void notifyComplete();
70
71 Ref<JSC::ArrayBuffer> m_audioData;
72 float m_sampleRate;
73 RefPtr<AudioBufferCallback> m_successCallback;
74 RefPtr<AudioBufferCallback> m_errorCallback;
75 RefPtr<AudioBuffer> m_audioBuffer;
76 };
77
78 void runLoop();
79
80 RefPtr<Thread> m_thread;
81 Lock m_threadCreationMutex;
82 MessageQueue<DecodingTask> m_queue;
83};
84
85} // namespace WebCore
86