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/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AudioSourceProviderAVFObjC_h
#define AudioSourceProviderAVFObjC_h
#if ENABLE(WEB_AUDIO) && USE(MEDIATOOLBOX)
#include "AudioSourceProvider.h"
#include <atomic>
#include <wtf/MediaTime.h>
#include <wtf/RetainPtr.h>
#include <wtf/ThreadSafeRefCounted.h>
OBJC_CLASS AVAssetTrack;
OBJC_CLASS AVPlayerItem;
OBJC_CLASS AVMutableAudioMix;
typedef const struct opaqueMTAudioProcessingTap *MTAudioProcessingTapRef;
typedef struct AudioBufferList AudioBufferList;
typedef struct AudioStreamBasicDescription AudioStreamBasicDescription;
typedef struct OpaqueAudioConverter* AudioConverterRef;
typedef uint32_t MTAudioProcessingTapFlags;
typedef signed long CMItemCount;
namespace WebCore {
class CARingBuffer;
class AudioSourceProviderAVFObjC : public ThreadSafeRefCounted<AudioSourceProviderAVFObjC>, public AudioSourceProvider {
public:
static RefPtr<AudioSourceProviderAVFObjC> create(AVPlayerItem*);
virtual ~AudioSourceProviderAVFObjC();
void setPlayerItem(AVPlayerItem *);
void setAudioTrack(AVAssetTrack *);
private:
AudioSourceProviderAVFObjC(AVPlayerItem *);
void destroyMix();
void createMix();
// AudioSourceProvider
void provideInput(AudioBus*, size_t framesToProcess) override;
void setClient(AudioSourceProviderClient*) override;
static void initCallback(MTAudioProcessingTapRef, void*, void**);
static void finalizeCallback(MTAudioProcessingTapRef);
static void prepareCallback(MTAudioProcessingTapRef, CMItemCount, const AudioStreamBasicDescription*);
static void unprepareCallback(MTAudioProcessingTapRef);
static void processCallback(MTAudioProcessingTapRef, CMItemCount, MTAudioProcessingTapFlags, AudioBufferList*, CMItemCount*, MTAudioProcessingTapFlags*);
void init(void* clientInfo, void** tapStorageOut);
void finalize();
void prepare(CMItemCount maxFrames, const AudioStreamBasicDescription *processingFormat);
void unprepare();
void process(MTAudioProcessingTapRef, CMItemCount numberFrames, MTAudioProcessingTapFlags flagsIn, AudioBufferList *bufferListInOut, CMItemCount *numberFramesOut, MTAudioProcessingTapFlags *flagsOut);
RetainPtr<AVPlayerItem> m_avPlayerItem;
RetainPtr<AVAssetTrack> m_avAssetTrack;
RetainPtr<AVMutableAudioMix> m_avAudioMix;
RetainPtr<MTAudioProcessingTapRef> m_tap;
RetainPtr<AudioConverterRef> m_converter;
std::unique_ptr<AudioBufferList> m_list;
std::unique_ptr<AudioStreamBasicDescription> m_tapDescription;
std::unique_ptr<AudioStreamBasicDescription> m_outputDescription;
std::unique_ptr<CARingBuffer> m_ringBuffer;
MediaTime m_startTimeAtLastProcess;
MediaTime m_endTimeAtLastProcess;
std::atomic<uint64_t> m_writeAheadCount { 0 };
uint64_t m_readCount { 0 };
enum { NoSeek = std::numeric_limits<uint64_t>::max() };
std::atomic<uint64_t> m_seekTo { NoSeek };
bool m_paused { true };
AudioSourceProviderClient* m_client { nullptr };
class TapStorage;
RefPtr<TapStorage> m_tapStorage;
};
}
#endif
#endif