FFmpeg/libswscale/yuv2rgb_mlib.c

/*
 * yuv2rgb_mlib.c, Software YUV to RGB coverter using mediaLib
 *
 *  Copyright (C) 2000, Håkan Hjort <d95hjort@dtek.chalmers.se>
 *  All Rights Reserved.
 *
 *  This file is part of mpeg2dec, a free MPEG-2 video decoder
 *
 *  mpeg2dec 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, or (at your option)
 *  any later version.
 *
 *  mpeg2dec 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with mpeg2dec; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <mlib_types.h>
#include <mlib_status.h>
#include <mlib_sys.h>
#include <mlib_video.h>
#include <inttypes.h>
#include <stdlib.h>
#include <assert.h>

#include "swscale.h"

static int mlib_YUV2ARGB420_32(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                               int srcSliceH, uint8_t* dst[], int dstStride[]){
    if(c->srcFormat == PIX_FMT_YUV422P){
        srcStride[1] *= 2;
        srcStride[2] *= 2;
    }

    assert(srcStride[1] == srcStride[2]);

    mlib_VideoColorYUV2ARGB420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
                               srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
    return srcSliceH;
}

static int mlib_YUV2ABGR420_32(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                               int srcSliceH, uint8_t* dst[], int dstStride[]){
    if(c->srcFormat == PIX_FMT_YUV422P){
        srcStride[1] *= 2;
        srcStride[2] *= 2;
    }

    assert(srcStride[1] == srcStride[2]);

    mlib_VideoColorYUV2ABGR420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
                               srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
    return srcSliceH;
}

static int mlib_YUV2RGB420_24(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                              int srcSliceH, uint8_t* dst[], int dstStride[]){
    if(c->srcFormat == PIX_FMT_YUV422P){
        srcStride[1] *= 2;
        srcStride[2] *= 2;
    }

    assert(srcStride[1] == srcStride[2]);

    mlib_VideoColorYUV2RGB420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
                              srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
    return srcSliceH;
}


SwsFunc yuv2rgb_init_mlib(SwsContext *c)
{
    switch(c->dstFormat){
    case PIX_FMT_RGB24: return mlib_YUV2RGB420_24;
    case PIX_FMT_BGR32: return mlib_YUV2ARGB420_32;
    case PIX_FMT_RGB32: return mlib_YUV2ABGR420_32;
    default: return NULL;
    }
}