/*
    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
{

/**
 * @brief The MJPEGEncoder class encodes frames in JPEG format before transmitting them to the client.
 *
 * The quality is now hard-coded at 70 when encoding the JPEG image. Further compression is not supported.
 */
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;

};

}
