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libswscale/mlib/yuv2rgb_mlib.c

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00001 /*
00002  * software YUV to RGB converter using mediaLib
00003  *
00004  * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include <mlib_types.h>
00024 #include <mlib_status.h>
00025 #include <mlib_sys.h>
00026 #include <mlib_video.h>
00027 #include <inttypes.h>
00028 #include <stdlib.h>
00029 #include <assert.h>
00030 
00031 #include "libswscale/swscale.h"
00032 
00033 static int mlib_YUV2ARGB420_32(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
00034                                int srcSliceH, uint8_t* dst[], int dstStride[])
00035 {
00036     if(c->srcFormat == PIX_FMT_YUV422P) {
00037         srcStride[1] *= 2;
00038         srcStride[2] *= 2;
00039     }
00040 
00041     assert(srcStride[1] == srcStride[2]);
00042 
00043     mlib_VideoColorYUV2ARGB420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
00044                                srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
00045     return srcSliceH;
00046 }
00047 
00048 static int mlib_YUV2ABGR420_32(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
00049                                int srcSliceH, uint8_t* dst[], int dstStride[])
00050 {
00051     if(c->srcFormat == PIX_FMT_YUV422P) {
00052         srcStride[1] *= 2;
00053         srcStride[2] *= 2;
00054     }
00055 
00056     assert(srcStride[1] == srcStride[2]);
00057 
00058     mlib_VideoColorYUV2ABGR420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
00059                                srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
00060     return srcSliceH;
00061 }
00062 
00063 static int mlib_YUV2RGB420_24(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
00064                               int srcSliceH, uint8_t* dst[], int dstStride[])
00065 {
00066     if(c->srcFormat == PIX_FMT_YUV422P) {
00067         srcStride[1] *= 2;
00068         srcStride[2] *= 2;
00069     }
00070 
00071     assert(srcStride[1] == srcStride[2]);
00072 
00073     mlib_VideoColorYUV2RGB420(dst[0]+srcSliceY*dstStride[0], src[0], src[1], src[2], c->dstW,
00074                               srcSliceH, dstStride[0], srcStride[0], srcStride[1]);
00075     return srcSliceH;
00076 }
00077 
00078 
00079 SwsFunc ff_yuv2rgb_init_mlib(SwsContext *c)
00080 {
00081     switch(c->dstFormat) {
00082     case PIX_FMT_RGB24: return mlib_YUV2RGB420_24;
00083     case PIX_FMT_BGR32: return mlib_YUV2ARGB420_32;
00084     case PIX_FMT_RGB32: return mlib_YUV2ABGR420_32;
00085     default: return NULL;
00086     }
00087 }
00088 

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