MJPEGVideoSource.hh

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/*
 *  Copyright (C) Massimo Cora' 2006 <maxcvs@email.it>
 *
 *  This program 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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */


//
// Class: MJPEGVideoSource
#ifndef _MJPEGVIDEOSOURCE_H_
#define _MJPEGVIDEOSOURCE_H_

// livemedia
#include <GroupsockHelper.hh>
#include <liveMedia.hh>
#include <JPEGVideoSource.hh>

// opencv
#include <cv.h>
#include <highgui.h>

#include <time.h>

#include "OStreamConfig.hh"
#include "BaseInputVideo.hh"
#include "OStreamVideoEncoder.hh"

#define JPEG_HEADER_MAX_SIZE 623

#define OUTPUT_PACKET_BUFFER_MAXSIZE    512000

class MJPEGVideoSource : public JPEGVideoSource
{
public:
        static MJPEGVideoSource*
                createNew( UsageEnvironment& env, BaseInputVideo* input_video, 
                                  int stream_id = 0, int frame_rate = 25, 
                                  int encoder_internal_buf_size = 1000000 );

        virtual ~MJPEGVideoSource();
        
protected:
        MJPEGVideoSource( UsageEnvironment& env, BaseInputVideo* input_video, 
                                          int stream_id, int frame_rate, int encoder_internal_buf_size);
        
private:                // functions
        void doGetNextFrame();
        
        void deliverFrame();
        
        void  startCapture();

        u_int8_t type();
        
        u_int8_t qFactor();
        
        u_int8_t width();                       // # pixels/8 (or 0 for 2048 pixels)
        
        u_int8_t height();                      // # pixels/8 (or 0 for 2048 pixels)

        u_int8_t const* quantizationTables( u_int8_t& precision, u_int16_t& length );
        
        
        int setParamsFromHeader( const unsigned char* fJPEGHeader );
        
        Boolean isJPEGVideoSource() const;
        
private:                // data 
        bool _initialized;

        /* Time per frame */
        unsigned fTimePerFrame;
        
        unsigned int fPreferredFrameSize;

        const unsigned char* _encoded_frame;
        
        struct timeval fLastCaptureTime;
        
        int _fps;
        
        int _frame_rate_millis;
        
        u_int8_t fLastQFactor, fLastWidth, fLastHeight;
        
        u_int8_t *qTable;

        int _encoder_internal_buf_size;
        
        int _stream_id;
        
        BaseInputVideo *_input_video;
        
        OStreamVideoEncoder *_video_encoder;       
        
#ifdef __LINUX__
        struct timezone Idunno; 
#else
        int Idunno;
#endif
        
        
};


#endif  //_MJPEGVIDEOSOURCE_H_

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