FFmpeg/libswscale/mlib/yuv2rgb_mlib.c

/*
 * software YUV to RGB converter using mediaLib
 *
 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; 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 "libswscale/swscale.h"
#include "libswscale/swscale_internal.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 ff_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;
    }
}