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 33 namespace blink { 34 35 class AudioBuffer; 36 class AudioBufferCallback; 37 class 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 42 class AsyncAudioDecoder { 43 WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder); 44 public: 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 51 private: 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
