v4l2_decode.h

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/*
    Copyright (C) 2005 by Jasem Mutlaq <mutlaqja@ikarustech.com>
    Copyright (C) 2014 by geehalel <geehalel@gmail.com>
 
    V4L2 Decode
 
    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 "indidevapi.h"
 
#include <vector>
 
#include <stdio.h>
#include <cstdlib>
 
#include <linux/videodev2.h>
 
class V4L2_Decoder
{
    public:
        V4L2_Decoder();
        virtual ~V4L2_Decoder();
 
        virtual void init() = 0;
        virtual const char *getName();
        virtual bool setcrop(struct v4l2_crop c)                              = 0;        
        virtual void resetcrop()                                              = 0;
        virtual void usesoftcrop(bool c)                                      = 0;
        virtual void setformat(struct v4l2_format f, bool use_ext_pix_format) = 0;
        virtual bool issupportedformat(unsigned int format)                   = 0;
        virtual const std::vector<unsigned int> &getsupportedformats()        = 0;
        virtual void decode(unsigned char *frame, struct v4l2_buffer *buf, bool native)    = 0;
        virtual unsigned char *getY()                                         = 0;
        virtual unsigned char *getU()                                         = 0;
        virtual unsigned char *getV()                                         = 0;
        virtual unsigned char *getMJPEGBuffer(int &size) = 0;
        virtual unsigned char *getRGBBuffer() = 0;
        virtual float *getLinearY()           = 0;
        virtual int getBpp()                  = 0;
        virtual void setQuantization(bool)    = 0;
        virtual void setLinearization(bool)   = 0;
 
    protected:
        const char *name;
};
 
class V4L2_Decode
{
    public:
        V4L2_Decode();
        ~V4L2_Decode();
        std::vector<V4L2_Decoder *> getDecoderList();
        V4L2_Decoder *getDecoder();
        V4L2_Decoder *getDefaultDecoder();
        void setDecoder(V4L2_Decoder *decoder);
 
    protected:
        std::vector<V4L2_Decoder *> decoder_list;
        V4L2_Decoder *current_decoder;
        V4L2_Decoder *default_decoder;
};