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 | #include "config.h" |
26 | |
27 | #if ENABLE(WEB_AUDIO) |
28 | |
29 | #include "AsyncAudioDecoder.h" |
30 | |
31 | #include "AudioBuffer.h" |
32 | #include "AudioBufferCallback.h" |
33 | #include <JavaScriptCore/ArrayBuffer.h> |
34 | #include <wtf/MainThread.h> |
35 | |
36 | namespace WebCore { |
37 | |
38 | AsyncAudioDecoder::AsyncAudioDecoder() |
39 | { |
40 | // Start worker thread. |
41 | LockHolder lock(m_threadCreationMutex); |
42 | m_thread = Thread::create("Audio Decoder" , [this] { |
43 | runLoop(); |
44 | }); |
45 | } |
46 | |
47 | AsyncAudioDecoder::~AsyncAudioDecoder() |
48 | { |
49 | m_queue.kill(); |
50 | |
51 | // Stop thread. |
52 | m_thread->waitForCompletion(); |
53 | } |
54 | |
55 | void AsyncAudioDecoder::decodeAsync(Ref<ArrayBuffer>&& audioData, float sampleRate, RefPtr<AudioBufferCallback>&& successCallback, RefPtr<AudioBufferCallback>&& errorCallback) |
56 | { |
57 | ASSERT(isMainThread()); |
58 | |
59 | auto decodingTask = std::make_unique<DecodingTask>(WTFMove(audioData), sampleRate, WTFMove(successCallback), WTFMove(errorCallback)); |
60 | m_queue.append(WTFMove(decodingTask)); // note that ownership of the task is effectively taken by the queue. |
61 | } |
62 | |
63 | void AsyncAudioDecoder::runLoop() |
64 | { |
65 | ASSERT(!isMainThread()); |
66 | |
67 | { |
68 | // Wait for until we have m_thread established before starting the run loop. |
69 | LockHolder lock(m_threadCreationMutex); |
70 | } |
71 | |
72 | // Keep running decoding tasks until we're killed. |
73 | while (auto decodingTask = m_queue.waitForMessage()) { |
74 | // Let the task take care of its own ownership. |
75 | // See DecodingTask::notifyComplete() for cleanup. |
76 | decodingTask.release()->decode(); |
77 | } |
78 | } |
79 | |
80 | AsyncAudioDecoder::DecodingTask::DecodingTask(Ref<ArrayBuffer>&& audioData, float sampleRate, RefPtr<AudioBufferCallback>&& successCallback, RefPtr<AudioBufferCallback>&& errorCallback) |
81 | : m_audioData(WTFMove(audioData)) |
82 | , m_sampleRate(sampleRate) |
83 | , m_successCallback(WTFMove(successCallback)) |
84 | , m_errorCallback(WTFMove(errorCallback)) |
85 | { |
86 | } |
87 | |
88 | void AsyncAudioDecoder::DecodingTask::decode() |
89 | { |
90 | // Do the actual decoding and invoke the callback. |
91 | m_audioBuffer = AudioBuffer::createFromAudioFileData(m_audioData->data(), m_audioData->byteLength(), false, sampleRate()); |
92 | |
93 | // Decoding is finished, but we need to do the callbacks on the main thread. |
94 | callOnMainThread([this] { |
95 | notifyComplete(); |
96 | }); |
97 | } |
98 | |
99 | void AsyncAudioDecoder::DecodingTask::notifyComplete() |
100 | { |
101 | if (audioBuffer() && successCallback()) |
102 | successCallback()->handleEvent(audioBuffer()); |
103 | else if (errorCallback()) |
104 | errorCallback()->handleEvent(audioBuffer()); |
105 | |
106 | // Our ownership was given up in AsyncAudioDecoder::runLoop() |
107 | // Make sure to clean up here. |
108 | delete this; |
109 | } |
110 | |
111 | } // namespace WebCore |
112 | |
113 | #endif // ENABLE(WEB_AUDIO) |
114 | |