86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
/*
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* Copyright (C) 2011, Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ExceptionOr.h"
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#include <memory>
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#include <wtf/Forward.h>
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#include <wtf/MessageQueue.h>
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#include <wtf/RefPtr.h>
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#include <wtf/Threading.h>
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namespace JSC {
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class ArrayBuffer;
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}
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namespace WebCore {
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class AudioBuffer;
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class AudioBufferCallback;
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// AsyncAudioDecoder asynchronously decodes audio file data from an ArrayBuffer in a worker thread.
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// Upon successful decoding, a completion callback will be invoked with the decoded PCM data in an AudioBuffer.
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class AsyncAudioDecoder final {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder);
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public:
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AsyncAudioDecoder();
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~AsyncAudioDecoder();
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// Must be called on the main thread.
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void decodeAsync(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>&&);
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private:
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class DecodingTask {
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WTF_MAKE_NONCOPYABLE(DecodingTask);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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DecodingTask(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>&& callback);
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void decode();
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private:
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JSC::ArrayBuffer& audioData() { return m_audioData; }
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float sampleRate() const { return m_sampleRate; }
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Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>& callback() { return m_callback; }
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AudioBuffer* audioBuffer() { return m_audioBuffer.get(); }
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void notifyComplete();
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Ref<JSC::ArrayBuffer> m_audioData;
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float m_sampleRate;
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Function<void(ExceptionOr<Ref<AudioBuffer>>&&)> m_callback;
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RefPtr<AudioBuffer> m_audioBuffer;
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};
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void runLoop();
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RefPtr<Thread> m_thread;
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Lock m_threadCreationMutex;
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MessageQueue<DecodingTask> m_queue;
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};
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} // namespace WebCore
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