mjpegencoder.h

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/*
    Copyright (C) 2017 by Jasem Mutlaq <mutlaqja@ikarustech.com>
 
    MJPEG Encoder Interface
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.
 
    This library 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
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
*/
 
#pragma once
 
#include "encoderinterface.h"
 
namespace INDI
{
 
class MJPEGEncoder : public EncoderInterface
{
    public:
        MJPEGEncoder();
        ~MJPEGEncoder();
 
        virtual bool upload(INDI::WidgetViewBlob *bp, const uint8_t *buffer, uint32_t nbytes, bool isCompressed = false) override;
 
    private:
        const char *getDeviceName();
        int jpeg_compress_8u_gray (const uint8_t * src, uint16_t width, uint16_t height, int stride, int scale, uint8_t * dest,
                                   int * destsize, int quality);
        int jpeg_compress_8u_rgb (const uint8_t * src, uint16_t width, uint16_t height, int stride, int scale, uint8_t * dest,
                                  int * destsize, int quality);
        uint8_t *jpegBuffer = nullptr;
        uint16_t jpegBufferSize = 1;
 
        static const int SCALE_WIDTH = 640;
 
};
 
}