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ffmpeg / libswscale / yuv2rgb.c @ aa2ead82

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/*
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 * software YUV to RGB converter
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 *
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 * Copyright (C) 2009 Konstantin Shishkov
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 *
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 * 1,4,8bpp support and context / deglobalize stuff
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 * by Michael Niedermayer (michaelni@gmx.at)
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <assert.h>
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#include "config.h"
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#include "rgb2rgb.h"
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#include "swscale.h"
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#include "swscale_internal.h"
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#include "libavutil/x86_cpu.h"
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extern const uint8_t dither_8x8_32[8][8];
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extern const uint8_t dither_8x8_73[8][8];
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extern const uint8_t dither_8x8_220[8][8];
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const int32_t ff_yuv2rgb_coeffs[8][4] = {
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    {117504, 138453, 13954, 34903}, /* no sequence_display_extension */
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    {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */
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    {104597, 132201, 25675, 53279}, /* unspecified */
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    {104597, 132201, 25675, 53279}, /* reserved */
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    {104448, 132798, 24759, 53109}, /* FCC */
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    {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */
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    {104597, 132201, 25675, 53279}, /* SMPTE 170M */
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    {117579, 136230, 16907, 35559}  /* SMPTE 240M (1987) */
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};
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#define LOADCHROMA(i)                               \
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    U = pu[i];                                      \
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    V = pv[i];                                      \
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    r = (void *)c->table_rV[V];                     \
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    g = (void *)(c->table_gU[U] + c->table_gV[V]);  \
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    b = (void *)c->table_bU[U];
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#define PUTRGB(dst,src,i)            \
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    Y = src[2*i];                    \
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    dst[2*i  ] = r[Y] + g[Y] + b[Y]; \
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    Y = src[2*i+1];                  \
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    dst[2*i+1] = r[Y] + g[Y] + b[Y];
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#define PUTRGB24(dst,src,i)                                  \
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    Y = src[2*i];                                            \
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    dst[6*i+0] = r[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = b[Y]; \
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    Y = src[2*i+1];                                          \
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    dst[6*i+3] = r[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = b[Y];
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#define PUTBGR24(dst,src,i)                                  \
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    Y = src[2*i];                                            \
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    dst[6*i+0] = b[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = r[Y]; \
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    Y = src[2*i+1];                                          \
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    dst[6*i+3] = b[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = r[Y];
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#define PUTRGBA(dst,ysrc,asrc,i,s)                      \
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    Y = ysrc[2*i];                                      \
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    dst[2*i  ] = r[Y] + g[Y] + b[Y] + (asrc[2*i  ]<<s); \
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    Y = ysrc[2*i+1];                                    \
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    dst[2*i+1] = r[Y] + g[Y] + b[Y] + (asrc[2*i+1]<<s);
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#define PUTRGB48(dst,src,i)             \
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    Y = src[2*i];                       \
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    dst[12*i+ 0] = dst[12*i+ 1] = r[Y]; \
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    dst[12*i+ 2] = dst[12*i+ 3] = g[Y]; \
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    dst[12*i+ 4] = dst[12*i+ 5] = b[Y]; \
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    Y = src[2*i+1];                     \
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    dst[12*i+ 6] = dst[12*i+ 7] = r[Y]; \
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    dst[12*i+ 8] = dst[12*i+ 9] = g[Y]; \
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    dst[12*i+10] = dst[12*i+11] = b[Y];
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#define YUV2RGBFUNC(func_name, dst_type, alpha) \
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static int func_name(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY, \
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                     int srcSliceH, uint8_t* dst[], int dstStride[]) \
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{\
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    int y;\
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\
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    if (!alpha && c->srcFormat == PIX_FMT_YUV422P) {\
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        srcStride[1] *= 2;\
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        srcStride[2] *= 2;\
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    }\
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    for (y=0; y<srcSliceH; y+=2) {\
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        dst_type *dst_1 = (dst_type*)(dst[0] + (y+srcSliceY  )*dstStride[0]);\
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        dst_type *dst_2 = (dst_type*)(dst[0] + (y+srcSliceY+1)*dstStride[0]);\
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        dst_type av_unused *r, *b;\
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        dst_type *g;\
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        const uint8_t *py_1 = src[0] + y*srcStride[0];\
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        const uint8_t *py_2 = py_1 + srcStride[0];\
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        const uint8_t *pu = src[1] + (y>>1)*srcStride[1];\
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        const uint8_t *pv = src[2] + (y>>1)*srcStride[2];\
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        const uint8_t av_unused *pa_1, *pa_2;\
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        unsigned int h_size = c->dstW>>3;\
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        if (alpha) {\
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            pa_1 = src[3] + y*srcStride[3];\
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            pa_2 = pa_1 + srcStride[3];\
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        }\
118
        while (h_size--) {\
119
            int av_unused U, V;\
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            int Y;\
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122
#define ENDYUV2RGBLINE(dst_delta)\
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            pu += 4;\
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            pv += 4;\
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            py_1 += 8;\
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            py_2 += 8;\
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            dst_1 += dst_delta;\
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            dst_2 += dst_delta;\
129
        }\
130
        if (c->dstW & 4) {\
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            int av_unused Y, U, V;\
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#define ENDYUV2RGBFUNC()\
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        }\
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    }\
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    return srcSliceH;\
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}
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#define CLOSEYUV2RGBFUNC(dst_delta)\
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    ENDYUV2RGBLINE(dst_delta)\
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    ENDYUV2RGBFUNC()
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YUV2RGBFUNC(yuv2rgb_c_48, uint8_t, 0)
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    LOADCHROMA(0);
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    PUTRGB48(dst_1,py_1,0);
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    PUTRGB48(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTRGB48(dst_2,py_2,1);
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    PUTRGB48(dst_1,py_1,1);
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    LOADCHROMA(2);
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    PUTRGB48(dst_1,py_1,2);
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    PUTRGB48(dst_2,py_2,2);
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    LOADCHROMA(3);
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    PUTRGB48(dst_2,py_2,3);
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    PUTRGB48(dst_1,py_1,3);
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ENDYUV2RGBLINE(48)
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    LOADCHROMA(0);
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    PUTRGB48(dst_1,py_1,0);
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    PUTRGB48(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTRGB48(dst_2,py_2,1);
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    PUTRGB48(dst_1,py_1,1);
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ENDYUV2RGBFUNC()
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YUV2RGBFUNC(yuv2rgb_c_32, uint32_t, 0)
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    LOADCHROMA(0);
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    PUTRGB(dst_1,py_1,0);
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    PUTRGB(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTRGB(dst_2,py_2,1);
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    PUTRGB(dst_1,py_1,1);
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    LOADCHROMA(2);
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    PUTRGB(dst_1,py_1,2);
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    PUTRGB(dst_2,py_2,2);
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    LOADCHROMA(3);
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    PUTRGB(dst_2,py_2,3);
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    PUTRGB(dst_1,py_1,3);
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ENDYUV2RGBLINE(8)
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    LOADCHROMA(0);
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    PUTRGB(dst_1,py_1,0);
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    PUTRGB(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTRGB(dst_2,py_2,1);
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    PUTRGB(dst_1,py_1,1);
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ENDYUV2RGBFUNC()
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YUV2RGBFUNC(yuva2rgba_c, uint32_t, 1)
196
    LOADCHROMA(0);
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    PUTRGBA(dst_1,py_1,pa_1,0,24);
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    PUTRGBA(dst_2,py_2,pa_2,0,24);
199

    
200
    LOADCHROMA(1);
201
    PUTRGBA(dst_2,py_2,pa_1,1,24);
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    PUTRGBA(dst_1,py_1,pa_2,1,24);
203

    
204
    LOADCHROMA(2);
205
    PUTRGBA(dst_1,py_1,pa_1,2,24);
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    PUTRGBA(dst_2,py_2,pa_2,2,24);
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    LOADCHROMA(3);
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    PUTRGBA(dst_2,py_2,pa_1,3,24);
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    PUTRGBA(dst_1,py_1,pa_2,3,24);
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    pa_1 += 8;\
212
    pa_2 += 8;\
213
ENDYUV2RGBLINE(8)
214
    LOADCHROMA(0);
215
    PUTRGBA(dst_1,py_1,pa_1,0,24);
216
    PUTRGBA(dst_2,py_2,pa_2,0,24);
217

    
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    LOADCHROMA(1);
219
    PUTRGBA(dst_2,py_2,pa_1,1,24);
220
    PUTRGBA(dst_1,py_1,pa_2,1,24);
221
ENDYUV2RGBFUNC()
222

    
223
YUV2RGBFUNC(yuva2argb_c, uint32_t, 1)
224
    LOADCHROMA(0);
225
    PUTRGBA(dst_1,py_1,pa_1,0,0);
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    PUTRGBA(dst_2,py_2,pa_2,0,0);
227

    
228
    LOADCHROMA(1);
229
    PUTRGBA(dst_2,py_2,pa_2,1,0);
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    PUTRGBA(dst_1,py_1,pa_1,1,0);
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    LOADCHROMA(2);
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    PUTRGBA(dst_1,py_1,pa_1,2,0);
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    PUTRGBA(dst_2,py_2,pa_2,2,0);
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    LOADCHROMA(3);
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    PUTRGBA(dst_2,py_2,pa_2,3,0);
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    PUTRGBA(dst_1,py_1,pa_1,3,0);
239
    pa_1 += 8;\
240
    pa_2 += 8;\
241
ENDYUV2RGBLINE(8)
242
    LOADCHROMA(0);
243
    PUTRGBA(dst_1,py_1,pa_1,0,0);
244
    PUTRGBA(dst_2,py_2,pa_2,0,0);
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246
    LOADCHROMA(1);
247
    PUTRGBA(dst_2,py_2,pa_2,1,0);
248
    PUTRGBA(dst_1,py_1,pa_1,1,0);
249
ENDYUV2RGBFUNC()
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251
YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t, 0)
252
    LOADCHROMA(0);
253
    PUTRGB24(dst_1,py_1,0);
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    PUTRGB24(dst_2,py_2,0);
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256
    LOADCHROMA(1);
257
    PUTRGB24(dst_2,py_2,1);
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    PUTRGB24(dst_1,py_1,1);
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260
    LOADCHROMA(2);
261
    PUTRGB24(dst_1,py_1,2);
262
    PUTRGB24(dst_2,py_2,2);
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264
    LOADCHROMA(3);
265
    PUTRGB24(dst_2,py_2,3);
266
    PUTRGB24(dst_1,py_1,3);
267
ENDYUV2RGBLINE(24)
268
    LOADCHROMA(0);
269
    PUTRGB24(dst_1,py_1,0);
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    PUTRGB24(dst_2,py_2,0);
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272
    LOADCHROMA(1);
273
    PUTRGB24(dst_2,py_2,1);
274
    PUTRGB24(dst_1,py_1,1);
275
ENDYUV2RGBFUNC()
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277
// only trivial mods from yuv2rgb_c_24_rgb
278
YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t, 0)
279
    LOADCHROMA(0);
280
    PUTBGR24(dst_1,py_1,0);
281
    PUTBGR24(dst_2,py_2,0);
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283
    LOADCHROMA(1);
284
    PUTBGR24(dst_2,py_2,1);
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    PUTBGR24(dst_1,py_1,1);
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287
    LOADCHROMA(2);
288
    PUTBGR24(dst_1,py_1,2);
289
    PUTBGR24(dst_2,py_2,2);
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291
    LOADCHROMA(3);
292
    PUTBGR24(dst_2,py_2,3);
293
    PUTBGR24(dst_1,py_1,3);
294
ENDYUV2RGBLINE(24)
295
    LOADCHROMA(0);
296
    PUTBGR24(dst_1,py_1,0);
297
    PUTBGR24(dst_2,py_2,0);
298

    
299
    LOADCHROMA(1);
300
    PUTBGR24(dst_2,py_2,1);
301
    PUTBGR24(dst_1,py_1,1);
302
ENDYUV2RGBFUNC()
303

    
304
// This is exactly the same code as yuv2rgb_c_32 except for the types of
305
// r, g, b, dst_1, dst_2
306
YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0)
307
    LOADCHROMA(0);
308
    PUTRGB(dst_1,py_1,0);
309
    PUTRGB(dst_2,py_2,0);
310

    
311
    LOADCHROMA(1);
312
    PUTRGB(dst_2,py_2,1);
313
    PUTRGB(dst_1,py_1,1);
314

    
315
    LOADCHROMA(2);
316
    PUTRGB(dst_1,py_1,2);
317
    PUTRGB(dst_2,py_2,2);
318

    
319
    LOADCHROMA(3);
320
    PUTRGB(dst_2,py_2,3);
321
    PUTRGB(dst_1,py_1,3);
322
CLOSEYUV2RGBFUNC(8)
323

    
324
#if 0 // Currently unused
325
// This is exactly the same code as yuv2rgb_c_32 except for the types of
326
// r, g, b, dst_1, dst_2
327
YUV2RGBFUNC(yuv2rgb_c_8, uint8_t, 0)
328
    LOADCHROMA(0);
329
    PUTRGB(dst_1,py_1,0);
330
    PUTRGB(dst_2,py_2,0);
331

332
    LOADCHROMA(1);
333
    PUTRGB(dst_2,py_2,1);
334
    PUTRGB(dst_1,py_1,1);
335

336
    LOADCHROMA(2);
337
    PUTRGB(dst_1,py_1,2);
338
    PUTRGB(dst_2,py_2,2);
339

340
    LOADCHROMA(3);
341
    PUTRGB(dst_2,py_2,3);
342
    PUTRGB(dst_1,py_1,3);
343
CLOSEYUV2RGBFUNC(8)
344
#endif
345

    
346
// r, g, b, dst_1, dst_2
347
YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t, 0)
348
    const uint8_t *d32 = dither_8x8_32[y&7];
349
    const uint8_t *d64 = dither_8x8_73[y&7];
350
#define PUTRGB8(dst,src,i,o)                                    \
351
    Y = src[2*i];                                               \
352
    dst[2*i]   = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \
353
    Y = src[2*i+1];                                             \
354
    dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];
355

    
356
    LOADCHROMA(0);
357
    PUTRGB8(dst_1,py_1,0,0);
358
    PUTRGB8(dst_2,py_2,0,0+8);
359

    
360
    LOADCHROMA(1);
361
    PUTRGB8(dst_2,py_2,1,2+8);
362
    PUTRGB8(dst_1,py_1,1,2);
363

    
364
    LOADCHROMA(2);
365
    PUTRGB8(dst_1,py_1,2,4);
366
    PUTRGB8(dst_2,py_2,2,4+8);
367

    
368
    LOADCHROMA(3);
369
    PUTRGB8(dst_2,py_2,3,6+8);
370
    PUTRGB8(dst_1,py_1,3,6);
371
CLOSEYUV2RGBFUNC(8)
372

    
373
#if 0 // Currently unused
374
// This is exactly the same code as yuv2rgb_c_32 except for the types of
375
// r, g, b, dst_1, dst_2
376
YUV2RGBFUNC(yuv2rgb_c_4, uint8_t, 0)
377
    int acc;
378
#define PUTRGB4(dst,src,i)          \
379
    Y = src[2*i];                   \
380
    acc = r[Y] + g[Y] + b[Y];       \
381
    Y = src[2*i+1];                 \
382
    acc |= (r[Y] + g[Y] + b[Y])<<4; \
383
    dst[i] = acc;
384

385
    LOADCHROMA(0);
386
    PUTRGB4(dst_1,py_1,0);
387
    PUTRGB4(dst_2,py_2,0);
388

389
    LOADCHROMA(1);
390
    PUTRGB4(dst_2,py_2,1);
391
    PUTRGB4(dst_1,py_1,1);
392

393
    LOADCHROMA(2);
394
    PUTRGB4(dst_1,py_1,2);
395
    PUTRGB4(dst_2,py_2,2);
396

397
    LOADCHROMA(3);
398
    PUTRGB4(dst_2,py_2,3);
399
    PUTRGB4(dst_1,py_1,3);
400
CLOSEYUV2RGBFUNC(4)
401
#endif
402

    
403
YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t, 0)
404
    const uint8_t *d64 =  dither_8x8_73[y&7];
405
    const uint8_t *d128 = dither_8x8_220[y&7];
406
    int acc;
407

    
408
#define PUTRGB4D(dst,src,i,o)                                     \
409
    Y = src[2*i];                                                 \
410
    acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]];        \
411
    Y = src[2*i+1];                                               \
412
    acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4;  \
413
    dst[i]= acc;
414

    
415
    LOADCHROMA(0);
416
    PUTRGB4D(dst_1,py_1,0,0);
417
    PUTRGB4D(dst_2,py_2,0,0+8);
418

    
419
    LOADCHROMA(1);
420
    PUTRGB4D(dst_2,py_2,1,2+8);
421
    PUTRGB4D(dst_1,py_1,1,2);
422

    
423
    LOADCHROMA(2);
424
    PUTRGB4D(dst_1,py_1,2,4);
425
    PUTRGB4D(dst_2,py_2,2,4+8);
426

    
427
    LOADCHROMA(3);
428
    PUTRGB4D(dst_2,py_2,3,6+8);
429
    PUTRGB4D(dst_1,py_1,3,6);
430
CLOSEYUV2RGBFUNC(4)
431

    
432
#if 0 // Currently unused
433
// This is exactly the same code as yuv2rgb_c_32 except for the types of
434
// r, g, b, dst_1, dst_2
435
YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t, 0)
436
    LOADCHROMA(0);
437
    PUTRGB(dst_1,py_1,0);
438
    PUTRGB(dst_2,py_2,0);
439

440
    LOADCHROMA(1);
441
    PUTRGB(dst_2,py_2,1);
442
    PUTRGB(dst_1,py_1,1);
443

444
    LOADCHROMA(2);
445
    PUTRGB(dst_1,py_1,2);
446
    PUTRGB(dst_2,py_2,2);
447

448
    LOADCHROMA(3);
449
    PUTRGB(dst_2,py_2,3);
450
    PUTRGB(dst_1,py_1,3);
451
CLOSEYUV2RGBFUNC(8)
452
#endif
453

    
454
YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t, 0)
455
    const uint8_t *d64 =  dither_8x8_73[y&7];
456
    const uint8_t *d128 = dither_8x8_220[y&7];
457

    
458
#define PUTRGB4DB(dst,src,i,o)                                    \
459
    Y = src[2*i];                                                 \
460
    dst[2*i]   = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
461
    Y = src[2*i+1];                                               \
462
    dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];
463

    
464
    LOADCHROMA(0);
465
    PUTRGB4DB(dst_1,py_1,0,0);
466
    PUTRGB4DB(dst_2,py_2,0,0+8);
467

    
468
    LOADCHROMA(1);
469
    PUTRGB4DB(dst_2,py_2,1,2+8);
470
    PUTRGB4DB(dst_1,py_1,1,2);
471

    
472
    LOADCHROMA(2);
473
    PUTRGB4DB(dst_1,py_1,2,4);
474
    PUTRGB4DB(dst_2,py_2,2,4+8);
475

    
476
    LOADCHROMA(3);
477
    PUTRGB4DB(dst_2,py_2,3,6+8);
478
    PUTRGB4DB(dst_1,py_1,3,6);
479
CLOSEYUV2RGBFUNC(8)
480

    
481
YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)
482
        const uint8_t *d128 = dither_8x8_220[y&7];
483
        char out_1 = 0, out_2 = 0;
484
        g= c->table_gU[128] + c->table_gV[128];
485

    
486
#define PUTRGB1(out,src,i,o)    \
487
    Y = src[2*i];               \
488
    out+= out + g[Y+d128[0+o]]; \
489
    Y = src[2*i+1];             \
490
    out+= out + g[Y+d128[1+o]];
491

    
492
    PUTRGB1(out_1,py_1,0,0);
493
    PUTRGB1(out_2,py_2,0,0+8);
494

    
495
    PUTRGB1(out_2,py_2,1,2+8);
496
    PUTRGB1(out_1,py_1,1,2);
497

    
498
    PUTRGB1(out_1,py_1,2,4);
499
    PUTRGB1(out_2,py_2,2,4+8);
500

    
501
    PUTRGB1(out_2,py_2,3,6+8);
502
    PUTRGB1(out_1,py_1,3,6);
503

    
504
    dst_1[0]= out_1;
505
    dst_2[0]= out_2;
506
CLOSEYUV2RGBFUNC(1)
507

    
508
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
509
{
510
    SwsFunc t = NULL;
511
#if (HAVE_MMX2 || HAVE_MMX) && CONFIG_GPL
512
     t = ff_yuv2rgb_init_mmx(c);
513
#endif
514
#if HAVE_VIS
515
    t = ff_yuv2rgb_init_vis(c);
516
#endif
517
#if CONFIG_MLIB
518
    t = ff_yuv2rgb_init_mlib(c);
519
#endif
520
#if HAVE_ALTIVEC
521
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
522
        t = ff_yuv2rgb_init_altivec(c);
523
#endif
524

    
525
#if ARCH_BFIN
526
    if (c->flags & SWS_CPU_CAPS_BFIN)
527
        t = ff_yuv2rgb_get_func_ptr_bfin(c);
528
#endif
529

    
530
    if (t)
531
        return t;
532

    
533
    av_log(c, AV_LOG_WARNING, "No accelerated colorspace conversion found from %s to %s.\n", sws_format_name(c->srcFormat), sws_format_name(c->dstFormat));
534

    
535
    switch (c->dstFormat) {
536
    case PIX_FMT_RGB48BE:
537
    case PIX_FMT_RGB48LE:    return yuv2rgb_c_48;
538
    case PIX_FMT_ARGB:
539
    case PIX_FMT_ABGR:       if (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) return yuva2argb_c;
540
    case PIX_FMT_RGBA:
541
    case PIX_FMT_BGRA:       return (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) ? yuva2rgba_c : yuv2rgb_c_32;
542
    case PIX_FMT_RGB24:      return yuv2rgb_c_24_rgb;
543
    case PIX_FMT_BGR24:      return yuv2rgb_c_24_bgr;
544
    case PIX_FMT_RGB565:
545
    case PIX_FMT_BGR565:
546
    case PIX_FMT_RGB555:
547
    case PIX_FMT_BGR555:     return yuv2rgb_c_16;
548
    case PIX_FMT_RGB8:
549
    case PIX_FMT_BGR8:       return yuv2rgb_c_8_ordered_dither;
550
    case PIX_FMT_RGB4:
551
    case PIX_FMT_BGR4:       return yuv2rgb_c_4_ordered_dither;
552
    case PIX_FMT_RGB4_BYTE:
553
    case PIX_FMT_BGR4_BYTE:  return yuv2rgb_c_4b_ordered_dither;
554
    case PIX_FMT_MONOBLACK:  return yuv2rgb_c_1_ordered_dither;
555
    default:
556
        assert(0);
557
    }
558
    return NULL;
559
}
560

    
561
static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)
562
{
563
    int i;
564
    int64_t cb = 0;
565

    
566
    y_table -= elemsize * (inc >> 9);
567

    
568
    for (i = 0; i < 256; i++) {
569
        table[i] = y_table + elemsize * (cb >> 16);
570
        cb += inc;
571
    }
572
}
573

    
574
static void fill_gv_table(int table[256], const int elemsize, const int inc)
575
{
576
    int i;
577
    int64_t cb = 0;
578
    int off = -(inc >> 9);
579

    
580
    for (i = 0; i < 256; i++) {
581
        table[i] = elemsize * (off + (cb >> 16));
582
        cb += inc;
583
    }
584
}
585

    
586
av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
587
                                     int brightness, int contrast, int saturation)
588
{
589
    const int isRgb =      c->dstFormat==PIX_FMT_RGB32
590
                        || c->dstFormat==PIX_FMT_RGB32_1
591
                        || c->dstFormat==PIX_FMT_BGR24
592
                        || c->dstFormat==PIX_FMT_RGB565
593
                        || c->dstFormat==PIX_FMT_RGB555
594
                        || c->dstFormat==PIX_FMT_RGB8
595
                        || c->dstFormat==PIX_FMT_RGB4
596
                        || c->dstFormat==PIX_FMT_RGB4_BYTE
597
                        || c->dstFormat==PIX_FMT_MONOBLACK;
598
    const int bpp = c->dstFormatBpp;
599
    uint8_t *y_table;
600
    uint16_t *y_table16;
601
    uint32_t *y_table32;
602
    int i, base, rbase, gbase, bbase, abase, needAlpha;
603
    const int yoffs = fullRange ? 384 : 326;
604

    
605
    int64_t crv =  inv_table[0];
606
    int64_t cbu =  inv_table[1];
607
    int64_t cgu = -inv_table[2];
608
    int64_t cgv = -inv_table[3];
609
    int64_t cy  = 1<<16;
610
    int64_t oy  = 0;
611

    
612
    int64_t yb = 0;
613

    
614
    if (!fullRange) {
615
        cy = (cy*255) / 219;
616
        oy = 16<<16;
617
    } else {
618
        crv = (crv*224) / 255;
619
        cbu = (cbu*224) / 255;
620
        cgu = (cgu*224) / 255;
621
        cgv = (cgv*224) / 255;
622
    }
623

    
624
    cy  = (cy *contrast             ) >> 16;
625
    crv = (crv*contrast * saturation) >> 32;
626
    cbu = (cbu*contrast * saturation) >> 32;
627
    cgu = (cgu*contrast * saturation) >> 32;
628
    cgv = (cgv*contrast * saturation) >> 32;
629
    oy -= 256*brightness;
630

    
631
    //scale coefficients by cy
632
    crv = ((crv << 16) + 0x8000) / cy;
633
    cbu = ((cbu << 16) + 0x8000) / cy;
634
    cgu = ((cgu << 16) + 0x8000) / cy;
635
    cgv = ((cgv << 16) + 0x8000) / cy;
636

    
637
    av_free(c->yuvTable);
638

    
639
    switch (bpp) {
640
    case 1:
641
        c->yuvTable = av_malloc(1024);
642
        y_table = c->yuvTable;
643
        yb = -(384<<16) - oy;
644
        for (i = 0; i < 1024-110; i++) {
645
            y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;
646
            yb += cy;
647
        }
648
        fill_table(c->table_gU, 1, cgu, y_table + yoffs);
649
        fill_gv_table(c->table_gV, 1, cgv);
650
        break;
651
    case 4:
652
    case 4|128:
653
        rbase = isRgb ? 3 : 0;
654
        gbase = 1;
655
        bbase = isRgb ? 0 : 3;
656
        c->yuvTable = av_malloc(1024*3);
657
        y_table = c->yuvTable;
658
        yb = -(384<<16) - oy;
659
        for (i = 0; i < 1024-110; i++) {
660
            int yval = av_clip_uint8((yb + 0x8000) >> 16);
661
            y_table[i+110     ] =  (yval >> 7)       << rbase;
662
            y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;
663
            y_table[i+110+2048] =  (yval >> 7)       << bbase;
664
            yb += cy;
665
        }
666
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
667
        fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
668
        fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
669
        fill_gv_table(c->table_gV, 1, cgv);
670
        break;
671
    case 8:
672
        rbase = isRgb ? 5 : 0;
673
        gbase = isRgb ? 2 : 3;
674
        bbase = isRgb ? 0 : 6;
675
        c->yuvTable = av_malloc(1024*3);
676
        y_table = c->yuvTable;
677
        yb = -(384<<16) - oy;
678
        for (i = 0; i < 1024-38; i++) {
679
            int yval = av_clip_uint8((yb + 0x8000) >> 16);
680
            y_table[i+16     ] = ((yval + 18) / 36) << rbase;
681
            y_table[i+16+1024] = ((yval + 18) / 36) << gbase;
682
            y_table[i+37+2048] = ((yval + 43) / 85) << bbase;
683
            yb += cy;
684
        }
685
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
686
        fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
687
        fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
688
        fill_gv_table(c->table_gV, 1, cgv);
689
        break;
690
    case 15:
691
    case 16:
692
        rbase = isRgb ? bpp - 5 : 0;
693
        gbase = 5;
694
        bbase = isRgb ? 0 : (bpp - 5);
695
        c->yuvTable = av_malloc(1024*3*2);
696
        y_table16 = c->yuvTable;
697
        yb = -(384<<16) - oy;
698
        for (i = 0; i < 1024; i++) {
699
            uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
700
            y_table16[i     ] = (yval >> 3)          << rbase;
701
            y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;
702
            y_table16[i+2048] = (yval >> 3)          << bbase;
703
            yb += cy;
704
        }
705
        fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
706
        fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
707
        fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
708
        fill_gv_table(c->table_gV, 2, cgv);
709
        break;
710
    case 24:
711
    case 48:
712
        c->yuvTable = av_malloc(1024);
713
        y_table = c->yuvTable;
714
        yb = -(384<<16) - oy;
715
        for (i = 0; i < 1024; i++) {
716
            y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);
717
            yb += cy;
718
        }
719
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
720
        fill_table(c->table_gU, 1, cgu, y_table + yoffs);
721
        fill_table(c->table_bU, 1, cbu, y_table + yoffs);
722
        fill_gv_table(c->table_gV, 1, cgv);
723
        break;
724
    case 32:
725
        base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;
726
        rbase = base + (isRgb ? 16 : 0);
727
        gbase = base + 8;
728
        bbase = base + (isRgb ? 0 : 16);
729
        needAlpha = CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat);
730
        if (!needAlpha)
731
            abase = (base + 24) & 31;
732
        c->yuvTable = av_malloc(1024*3*4);
733
        y_table32 = c->yuvTable;
734
        yb = -(384<<16) - oy;
735
        for (i = 0; i < 1024; i++) {
736
            uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
737
            y_table32[i     ] = (yval << rbase) + (needAlpha ? 0 : (255 << abase));
738
            y_table32[i+1024] = yval << gbase;
739
            y_table32[i+2048] = yval << bbase;
740
            yb += cy;
741
        }
742
        fill_table(c->table_rV, 4, crv, y_table32 + yoffs);
743
        fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);
744
        fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);
745
        fill_gv_table(c->table_gV, 4, cgv);
746
        break;
747
    default:
748
        c->yuvTable = NULL;
749
        av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);
750
        return -1;
751
    }
752
    return 0;
753
}