v4l2_builtin_decoder.h

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/*
    Copyright (C) 2005 by Jasem Mutlaq <[email protected]>
    Copyright (C) 2014 by geehalel <[email protected]>
 
    V4L2 Builtin Decoder
 
    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 "v4l2_decode.h"
 
#include <cstdint>
#include <map>
 
class V4L2_Builtin_Decoder : public V4L2_Decoder
{
        struct format
        {
            unsigned int fourcc; // V4L2 format
            unsigned char bpp;   // bytes per pixel implementation
            bool softcrop;       // softcropping available
            format(unsigned int f, unsigned char b = 8, bool sc = false) : fourcc(f), bpp(b), softcrop(sc) {}
        };
 
    public:
        V4L2_Builtin_Decoder();
        virtual ~V4L2_Builtin_Decoder();
        virtual void init();
        virtual bool setcrop(struct v4l2_crop c);
        virtual void resetcrop();
        virtual void usesoftcrop(bool c);
        virtual void setformat(struct v4l2_format f, bool use_ext_pix_format);
        virtual uint32_t getFormat();
        virtual bool issupportedformat(unsigned int format);
        virtual const std::vector<unsigned int> &getsupportedformats();
        virtual void decode(unsigned char *frame, struct v4l2_buffer *buf, bool native);
        virtual unsigned char *getY();
        virtual unsigned char *getU();
        virtual unsigned char *getV();
        virtual unsigned char *getRGBBuffer();
        virtual unsigned char *getMJPEGBuffer(int &size);
        virtual float *getLinearY();
        virtual int getBpp();
        virtual void setQuantization(bool);
        virtual void setLinearization(bool);
 
    protected:
        void init_supported_formats();
        std::map<unsigned int, struct format *> supported_formats;
        std::vector<unsigned int> vsuppformats;
        void allocBuffers();
        void makeY();
        void makeLinearY();
 
        struct v4l2_crop crop;
        struct v4l2_format fmt;
        bool useSoftCrop; // uses software cropping
        bool doCrop;      // do software cropping when decoding frames
        bool doQuantization;
        bool doLinearization;
 
        unsigned char *YBuf;
        unsigned char *UBuf;
        unsigned char *VBuf;
        unsigned char *yuvBuffer;
        unsigned char *yuyvBuffer;
        unsigned char *colorBuffer;
        unsigned char *rgb24_buffer;
        float *linearBuffer;
        //unsigned char *cropbuf;
        unsigned int bufwidth;
        unsigned int bufheight;
        char lut5[32];
        char lut6[64];
        unsigned char bpp;
        int m_Size;
};