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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 "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"
43 AsyncAudioDecoder::AsyncAudioDecoder()
44 : m_thread(adoptPtr(blink::Platform::current()->createThread("Audio Decoder")))
48 AsyncAudioDecoder::~AsyncAudioDecoder()
52 void AsyncAudioDecoder::decodeAsync(ArrayBuffer* audioData, float sampleRate, PassOwnPtr<AudioBufferCallback> successCallback, PassOwnPtr<AudioBufferCallback> errorCallback)
54 ASSERT(isMainThread());
59 // Add a ref to keep audioData alive until completion of decoding.
60 RefPtr<ArrayBuffer> audioDataRef(audioData);
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.leakPtr(), errorCallback.leakPtr())));
66 void AsyncAudioDecoder::decode(ArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback)
68 RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(audioData->data(), audioData->byteLength(), false, sampleRate);
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()));
75 void AsyncAudioDecoder::notifyComplete(ArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus* audioBus)
77 // Adopt references, so everything gets correctly dereffed.
78 RefPtr<ArrayBuffer> audioDataRef = adoptRef(audioData);
79 OwnPtr<AudioBufferCallback> successCallbackPtr = adoptPtr(successCallback);
80 OwnPtr<AudioBufferCallback> errorCallbackPtr = adoptPtr(errorCallback);
81 RefPtr<AudioBus> audioBusRef = adoptRef(audioBus);
83 RefPtrWillBeRawPtr<AudioBuffer> audioBuffer = AudioBuffer::createFromAudioBus(audioBus);
84 if (audioBuffer.get() && successCallback)
85 successCallback->handleEvent(audioBuffer.get());
86 else if (errorCallback)
87 errorCallback->handleEvent(audioBuffer.get());
90 } // namespace WebCore
92 #endif // ENABLE(WEB_AUDIO)