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 | |
33 | namespace JSC { |
34 | class ArrayBuffer; |
35 | } |
36 | |
37 | namespace WebCore { |
38 | |
39 | class AudioBuffer; |
40 | class 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 | |
45 | class AsyncAudioDecoder { |
46 | WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder); |
47 | public: |
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 | |
54 | private: |
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 | |