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/*
* Copyright (C) 2015-2016 Département de l'Instruction Publique (DIP-SEM)
*
* Copyright (C) 2013 Open Education Foundation
*
* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
* l'Education Numérique en Afrique (GIP ENA)
*
* This file is part of OpenBoard.
*
* OpenBoard is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License,
* with a specific linking exception for the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the
* same license as the "OpenSSL" library).
*
* OpenBoard is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef UBQUICKTIMEFILE_H_
#define UBQUICKTIMEFILE_H_
#include <QtCore>
#include <CoreVideo/CoreVideo.h>
#include <CoreMedia/CoreMedia.h>
#include "UBAudioQueueRecorder.h"
// Trick to get around the fact that the C++ compiler doesn't
// like Objective C code.
#ifdef __OBJC__ // defined by the Objective C compiler
@class AVAssetWriter;
@class AVAssetWriterInput;
@class AVAssetWriterInputPixelBufferAdaptor;
typedef AVAssetWriter* AssetWriterPTR;
typedef AVAssetWriterInput* AssetWriterInputPTR;
typedef AVAssetWriterInputPixelBufferAdaptor* AssetWriterInputAdaptorPTR;
#else
typedef void* AssetWriterPTR;
typedef void* AssetWriterInputPTR;
typedef void* AssetWriterInputAdaptorPTR;
#endif
class UBQuickTimeFile : public QThread
{
Q_OBJECT;
public:
struct VideoFrame
{
CVPixelBufferRef buffer;
long timestamp;
};
static QWaitCondition frameBufferNotEmpty;
UBQuickTimeFile(QObject * pParent = 0);
virtual ~UBQuickTimeFile();
bool init(const QString& videoFileName, const QString& profileData
, int pFramesPerSecond, const QSize& pFrameSize
, bool recordAudio = true, const QString& audioDeviceName = QString("Default"));
void stop();
CVPixelBufferRef newPixelBuffer();
void enqueueVideoFrame(VideoFrame frame);
bool isCompressionSessionRunning() { return mCompressionSessionRunning; }
QString lastErrorMessage() const { return mLastErrorMessage; }
signals:
void audioLevelChanged(quint8 level);
void compressionSessionStarted();
void compressionFinished();
protected:
void run();
private slots:
void enqueueAudioBuffer(void* pBuffer, long pLength);
private:
QString mLastErrorMessage;
// Format information
QString mVideoFileName;
QSize mFrameSize;
long mTimeScale;
bool mRecordAudio;
QString mAudioRecordingDeviceName;
// Video/audio encoders and associated objects
AssetWriterPTR mVideoWriter;
AssetWriterInputPTR mVideoWriterInput;
AssetWriterInputAdaptorPTR mAdaptor;
AssetWriterInputPTR mAudioWriterInput;
// Audio recorder
QPointer<UBAudioQueueRecorder> mWaveRecorder;
CMAudioFormatDescriptionRef mAudioFormatDescription;
// Variables used during encoding
CFAbsoluteTime mStartTime;
CMTime mLastFrameTimestamp;
volatile bool mShouldStopCompression;
volatile bool mCompressionSessionRunning;
// Dispatch queues to handle passing data to the A/V encoders
dispatch_queue_t mVideoDispatchQueue;
dispatch_queue_t mAudioDispatchQueue;
// Queues for frames and audio buffers to be encoded
QQueue<VideoFrame> frameQueue;
QQueue<CMSampleBufferRef> audioQueue;
QMutex frameQueueMutex;
QMutex audioQueueMutex;
QMutex audioWriterMutex;
// Private functions
void setLastErrorMessage(const QString& error);
bool beginSession();
void endSession();
void appendFrameToVideo(CVPixelBufferRef pixelBuffer, long msTimeStamp);
bool appendSampleBuffer(CMSampleBufferRef sampleBuffer);
};
#endif /* UBQUICKTIMEFILE_H_ */