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 "modules/webaudio/AsyncAudioDecoder.h" 30 31 #include "modules/webaudio/AudioBuffer.h" 32 #include "modules/webaudio/AudioBufferCallback.h" 33 #include "platform/Task.h" 34 #include "platform/audio/AudioBus.h" 35 #include "platform/audio/AudioFileReader.h" 36 #include "public/platform/Platform.h" 37 #include "wtf/ArrayBuffer.h" 38 #include "wtf/MainThread.h" 39 #include "wtf/PassOwnPtr.h" 40 41 namespace blink { 42 43 AsyncAudioDecoder::AsyncAudioDecoder() 44 : m_thread(adoptPtr(Platform::current()->createThread("Audio Decoder"))) 45 { 46 } 47 48 AsyncAudioDecoder::~AsyncAudioDecoder() 49 { 50 } 51 52 void AsyncAudioDecoder::decodeAsync(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback) 53 { 54 ASSERT(isMainThread()); 55 ASSERT(audioData); 56 if (!audioData) 57 return; 58 59 // Add a ref to keep audioData alive until completion of decoding. 60 RefPtr<ArrayBuffer> audioDataRef(audioData); 61 62 // The leak references to successCallback and errorCallback are picked up on notifyComplete. 63 m_thread->postTask(new Task(WTF::bind(&AsyncAudioDecoder::decode, audioDataRef.release().leakRef(), sampleRate, successCallback, errorCallback))); 64 } 65 66 void AsyncAudioDecoder::decode(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback) 67 { 68 RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(audioData->data(), audioData->byteLength(), false, sampleRate); 69 70 // Decoding is finished, but we need to do the callbacks on the main thread. 71 // The leaked reference to audioBuffer is picked up in notifyComplete. 72 callOnMainThread(WTF::bind(&AsyncAudioDecoder::notifyComplete, audioData, successCallback, errorCallback, bus.release().leakRef())); 73 } 74 75 void AsyncAudioDecoder::notifyComplete(ArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus* audioBus) 76 { 77 // Adopt references, so everything gets correctly dereffed. 78 RefPtr<ArrayBuffer> audioDataRef = adoptRef(audioData); 79 RefPtr<AudioBus> audioBusRef = adoptRef(audioBus); 80 81 AudioBuffer* audioBuffer = AudioBuffer::createFromAudioBus(audioBus); 82 if (audioBuffer && successCallback) 83 successCallback->handleEvent(audioBuffer); 84 else if (errorCallback) 85 errorCallback->handleEvent(audioBuffer); 86 } 87 88 } // namespace blink 89 90 #endif // ENABLE(WEB_AUDIO) 91
