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29 #include "modules/webaudio/AsyncAudioDecoder.h"
31 #include "modules/webaudio/AudioBuffer.h"
32 #include "modules/webaudio/AudioBufferCallback.h"
33 #include "platform/Task.h"
34 #include "public/platform/Platform.h"
35 #include "wtf/ArrayBuffer.h"
36 #include "wtf/MainThread.h"
37 #include "wtf/PassOwnPtr.h"
41 AsyncAudioDecoder::AsyncAudioDecoder()
42 : m_thread(adoptPtr(blink::Platform::current()->createThread("Audio Decoder")))
46 AsyncAudioDecoder::~AsyncAudioDecoder()
50 void AsyncAudioDecoder::decodeAsync(ArrayBuffer* audioData, float sampleRate, PassOwnPtr<AudioBufferCallback> successCallback, PassOwnPtr<AudioBufferCallback> errorCallback)
52 ASSERT(isMainThread());
57 // Add a ref to keep audioData alive until completion of decoding.
58 RefPtr<ArrayBuffer> audioDataRef(audioData);
60 // The leak references to successCallback and errorCallback are picked up on notifyComplete.
61 m_thread->postTask(new Task(WTF::bind(&AsyncAudioDecoder::decode, audioDataRef.release().leakRef(), sampleRate, successCallback.leakPtr(), errorCallback.leakPtr())));
64 void AsyncAudioDecoder::decode(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback)
66 // Do the actual decoding and invoke the callback.
67 RefPtr<AudioBuffer> audioBuffer = AudioBuffer::createFromAudioFileData(audioData->data(), audioData->byteLength(), false, sampleRate);
69 // Decoding is finished, but we need to do the callbacks on the main thread.
70 // The leaked reference to audioBuffer is picked up in notifyComplete.
71 callOnMainThread(WTF::bind(&AsyncAudioDecoder::notifyComplete, audioData, successCallback, errorCallback, audioBuffer.release().leakRef()));
74 void AsyncAudioDecoder::notifyComplete(ArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBuffer* audioBuffer)
76 // Adopt references, so everything gets correctly dereffed.
77 RefPtr<ArrayBuffer> audioDataRef = adoptRef(audioData);
78 OwnPtr<AudioBufferCallback> successCallbackPtr = adoptPtr(successCallback);
79 OwnPtr<AudioBufferCallback> errorCallbackPtr = adoptPtr(errorCallback);
80 RefPtr<AudioBuffer> audioBufferRef = adoptRef(audioBuffer);
82 if (audioBuffer && successCallback)
83 successCallback->handleEvent(audioBuffer);
84 else if (errorCallback)
85 errorCallback->handleEvent(audioBuffer);
88 } // namespace WebCore
90 #endif // ENABLE(WEB_AUDIO)