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ffmpeg / libswscale / yuv2rgb.c @ df226e63

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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, uint8_t* src[], int srcStride[], int srcSliceY, \
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                     int srcSliceH, uint8_t* dst[], int dstStride[]){\
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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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        uint8_t *py_1 = src[0] + y*srcStride[0];\
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        uint8_t *py_2 = py_1 + srcStride[0];\
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        uint8_t *pu = src[1] + (y>>1)*srcStride[1];\
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        uint8_t *pv = src[2] + (y>>1)*srcStride[2];\
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        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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        }\
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        while (h_size--) {\
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            int av_unused U, V;\
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            int Y;\
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#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;\
128
        }\
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        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)
195
    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);
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    LOADCHROMA(1);
200
    PUTRGBA(dst_2,py_2,pa_1,1,24);
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    PUTRGBA(dst_1,py_1,pa_2,1,24);
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    LOADCHROMA(2);
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    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;\
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    pa_2 += 8;\
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ENDYUV2RGBLINE(8)
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    LOADCHROMA(0);
214
    PUTRGBA(dst_1,py_1,pa_1,0,24);
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    PUTRGBA(dst_2,py_2,pa_2,0,24);
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    LOADCHROMA(1);
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    PUTRGBA(dst_2,py_2,pa_1,1,24);
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    PUTRGBA(dst_1,py_1,pa_2,1,24);
220
ENDYUV2RGBFUNC()
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YUV2RGBFUNC(yuva2argb_c, uint32_t, 1)
223
    LOADCHROMA(0);
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    PUTRGBA(dst_1,py_1,pa_1,0,0);
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    PUTRGBA(dst_2,py_2,pa_2,0,0);
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    LOADCHROMA(1);
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    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);
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    pa_1 += 8;\
239
    pa_2 += 8;\
240
ENDYUV2RGBLINE(8)
241
    LOADCHROMA(0);
242
    PUTRGBA(dst_1,py_1,pa_1,0,0);
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    PUTRGBA(dst_2,py_2,pa_2,0,0);
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    LOADCHROMA(1);
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    PUTRGBA(dst_2,py_2,pa_2,1,0);
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    PUTRGBA(dst_1,py_1,pa_1,1,0);
248
ENDYUV2RGBFUNC()
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YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t, 0)
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    LOADCHROMA(0);
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    PUTRGB24(dst_1,py_1,0);
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    PUTRGB24(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTRGB24(dst_2,py_2,1);
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    PUTRGB24(dst_1,py_1,1);
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    LOADCHROMA(2);
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    PUTRGB24(dst_1,py_1,2);
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    PUTRGB24(dst_2,py_2,2);
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    LOADCHROMA(3);
264
    PUTRGB24(dst_2,py_2,3);
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    PUTRGB24(dst_1,py_1,3);
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ENDYUV2RGBLINE(24)
267
    LOADCHROMA(0);
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    PUTRGB24(dst_1,py_1,0);
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    PUTRGB24(dst_2,py_2,0);
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271
    LOADCHROMA(1);
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    PUTRGB24(dst_2,py_2,1);
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    PUTRGB24(dst_1,py_1,1);
274
ENDYUV2RGBFUNC()
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// only trivial mods from yuv2rgb_c_24_rgb
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YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t, 0)
278
    LOADCHROMA(0);
279
    PUTBGR24(dst_1,py_1,0);
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    PUTBGR24(dst_2,py_2,0);
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    LOADCHROMA(1);
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    PUTBGR24(dst_2,py_2,1);
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    PUTBGR24(dst_1,py_1,1);
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    LOADCHROMA(2);
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    PUTBGR24(dst_1,py_1,2);
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    PUTBGR24(dst_2,py_2,2);
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290
    LOADCHROMA(3);
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    PUTBGR24(dst_2,py_2,3);
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    PUTBGR24(dst_1,py_1,3);
293
ENDYUV2RGBLINE(24)
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    LOADCHROMA(0);
295
    PUTBGR24(dst_1,py_1,0);
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    PUTBGR24(dst_2,py_2,0);
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298
    LOADCHROMA(1);
299
    PUTBGR24(dst_2,py_2,1);
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    PUTBGR24(dst_1,py_1,1);
301
ENDYUV2RGBFUNC()
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// This is exactly the same code as yuv2rgb_c_32 except for the types of
304
// r, g, b, dst_1, dst_2
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YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0)
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    LOADCHROMA(0);
307
    PUTRGB(dst_1,py_1,0);
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    PUTRGB(dst_2,py_2,0);
309

    
310
    LOADCHROMA(1);
311
    PUTRGB(dst_2,py_2,1);
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    PUTRGB(dst_1,py_1,1);
313

    
314
    LOADCHROMA(2);
315
    PUTRGB(dst_1,py_1,2);
316
    PUTRGB(dst_2,py_2,2);
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318
    LOADCHROMA(3);
319
    PUTRGB(dst_2,py_2,3);
320
    PUTRGB(dst_1,py_1,3);
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CLOSEYUV2RGBFUNC(8)
322

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

    
330
    LOADCHROMA(1);
331
    PUTRGB(dst_2,py_2,1);
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    PUTRGB(dst_1,py_1,1);
333

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

    
338
    LOADCHROMA(3);
339
    PUTRGB(dst_2,py_2,3);
340
    PUTRGB(dst_1,py_1,3);
341
CLOSEYUV2RGBFUNC(8)
342

    
343
// r, g, b, dst_1, dst_2
344
YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t, 0)
345
    const uint8_t *d32 = dither_8x8_32[y&7];
346
    const uint8_t *d64 = dither_8x8_73[y&7];
347
#define PUTRGB8(dst,src,i,o)                                    \
348
    Y = src[2*i];                                               \
349
    dst[2*i]   = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \
350
    Y = src[2*i+1];                                             \
351
    dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];
352

    
353
    LOADCHROMA(0);
354
    PUTRGB8(dst_1,py_1,0,0);
355
    PUTRGB8(dst_2,py_2,0,0+8);
356

    
357
    LOADCHROMA(1);
358
    PUTRGB8(dst_2,py_2,1,2+8);
359
    PUTRGB8(dst_1,py_1,1,2);
360

    
361
    LOADCHROMA(2);
362
    PUTRGB8(dst_1,py_1,2,4);
363
    PUTRGB8(dst_2,py_2,2,4+8);
364

    
365
    LOADCHROMA(3);
366
    PUTRGB8(dst_2,py_2,3,6+8);
367
    PUTRGB8(dst_1,py_1,3,6);
368
CLOSEYUV2RGBFUNC(8)
369

    
370

    
371
// This is exactly the same code as yuv2rgb_c_32 except for the types of
372
// r, g, b, dst_1, dst_2
373
YUV2RGBFUNC(yuv2rgb_c_4, uint8_t, 0)
374
    int acc;
375
#define PUTRGB4(dst,src,i)          \
376
    Y = src[2*i];                   \
377
    acc = r[Y] + g[Y] + b[Y];       \
378
    Y = src[2*i+1];                 \
379
    acc |= (r[Y] + g[Y] + b[Y])<<4; \
380
    dst[i] = acc;
381

    
382
    LOADCHROMA(0);
383
    PUTRGB4(dst_1,py_1,0);
384
    PUTRGB4(dst_2,py_2,0);
385

    
386
    LOADCHROMA(1);
387
    PUTRGB4(dst_2,py_2,1);
388
    PUTRGB4(dst_1,py_1,1);
389

    
390
    LOADCHROMA(2);
391
    PUTRGB4(dst_1,py_1,2);
392
    PUTRGB4(dst_2,py_2,2);
393

    
394
    LOADCHROMA(3);
395
    PUTRGB4(dst_2,py_2,3);
396
    PUTRGB4(dst_1,py_1,3);
397
CLOSEYUV2RGBFUNC(4)
398

    
399
YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t, 0)
400
    const uint8_t *d64 =  dither_8x8_73[y&7];
401
    const uint8_t *d128 = dither_8x8_220[y&7];
402
    int acc;
403

    
404
#define PUTRGB4D(dst,src,i,o)                                     \
405
    Y = src[2*i];                                                 \
406
    acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]];        \
407
    Y = src[2*i+1];                                               \
408
    acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4;  \
409
    dst[i]= acc;
410

    
411
    LOADCHROMA(0);
412
    PUTRGB4D(dst_1,py_1,0,0);
413
    PUTRGB4D(dst_2,py_2,0,0+8);
414

    
415
    LOADCHROMA(1);
416
    PUTRGB4D(dst_2,py_2,1,2+8);
417
    PUTRGB4D(dst_1,py_1,1,2);
418

    
419
    LOADCHROMA(2);
420
    PUTRGB4D(dst_1,py_1,2,4);
421
    PUTRGB4D(dst_2,py_2,2,4+8);
422

    
423
    LOADCHROMA(3);
424
    PUTRGB4D(dst_2,py_2,3,6+8);
425
    PUTRGB4D(dst_1,py_1,3,6);
426
CLOSEYUV2RGBFUNC(4)
427

    
428
// This is exactly the same code as yuv2rgb_c_32 except for the types of
429
// r, g, b, dst_1, dst_2
430
YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t, 0)
431
    LOADCHROMA(0);
432
    PUTRGB(dst_1,py_1,0);
433
    PUTRGB(dst_2,py_2,0);
434

    
435
    LOADCHROMA(1);
436
    PUTRGB(dst_2,py_2,1);
437
    PUTRGB(dst_1,py_1,1);
438

    
439
    LOADCHROMA(2);
440
    PUTRGB(dst_1,py_1,2);
441
    PUTRGB(dst_2,py_2,2);
442

    
443
    LOADCHROMA(3);
444
    PUTRGB(dst_2,py_2,3);
445
    PUTRGB(dst_1,py_1,3);
446
CLOSEYUV2RGBFUNC(8)
447

    
448
YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t, 0)
449
    const uint8_t *d64 =  dither_8x8_73[y&7];
450
    const uint8_t *d128 = dither_8x8_220[y&7];
451

    
452
#define PUTRGB4DB(dst,src,i,o)                                    \
453
    Y = src[2*i];                                                 \
454
    dst[2*i]   = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
455
    Y = src[2*i+1];                                               \
456
    dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];
457

    
458
    LOADCHROMA(0);
459
    PUTRGB4DB(dst_1,py_1,0,0);
460
    PUTRGB4DB(dst_2,py_2,0,0+8);
461

    
462
    LOADCHROMA(1);
463
    PUTRGB4DB(dst_2,py_2,1,2+8);
464
    PUTRGB4DB(dst_1,py_1,1,2);
465

    
466
    LOADCHROMA(2);
467
    PUTRGB4DB(dst_1,py_1,2,4);
468
    PUTRGB4DB(dst_2,py_2,2,4+8);
469

    
470
    LOADCHROMA(3);
471
    PUTRGB4DB(dst_2,py_2,3,6+8);
472
    PUTRGB4DB(dst_1,py_1,3,6);
473
CLOSEYUV2RGBFUNC(8)
474

    
475
YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)
476
        const uint8_t *d128 = dither_8x8_220[y&7];
477
        char out_1 = 0, out_2 = 0;
478
        g= c->table_gU[128] + c->table_gV[128];
479

    
480
#define PUTRGB1(out,src,i,o)    \
481
    Y = src[2*i];               \
482
    out+= out + g[Y+d128[0+o]]; \
483
    Y = src[2*i+1];             \
484
    out+= out + g[Y+d128[1+o]];
485

    
486
    PUTRGB1(out_1,py_1,0,0);
487
    PUTRGB1(out_2,py_2,0,0+8);
488

    
489
    PUTRGB1(out_2,py_2,1,2+8);
490
    PUTRGB1(out_1,py_1,1,2);
491

    
492
    PUTRGB1(out_1,py_1,2,4);
493
    PUTRGB1(out_2,py_2,2,4+8);
494

    
495
    PUTRGB1(out_2,py_2,3,6+8);
496
    PUTRGB1(out_1,py_1,3,6);
497

    
498
    dst_1[0]= out_1;
499
    dst_2[0]= out_2;
500
CLOSEYUV2RGBFUNC(1)
501

    
502
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
503
{
504
    SwsFunc t = NULL;
505
#if (HAVE_MMX2 || HAVE_MMX) && CONFIG_GPL
506
     t = ff_yuv2rgb_init_mmx(c);
507
#endif
508
#if HAVE_VIS
509
    t = ff_yuv2rgb_init_vis(c);
510
#endif
511
#if CONFIG_MLIB
512
    t = ff_yuv2rgb_init_mlib(c);
513
#endif
514
#if HAVE_ALTIVEC
515
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
516
        t = ff_yuv2rgb_init_altivec(c);
517
#endif
518

    
519
#if ARCH_BFIN
520
    if (c->flags & SWS_CPU_CAPS_BFIN)
521
        t = ff_yuv2rgb_get_func_ptr_bfin(c);
522
#endif
523

    
524
    if (t)
525
        return t;
526

    
527
    av_log(c, AV_LOG_WARNING, "No accelerated colorspace conversion found.\n");
528

    
529
    switch (c->dstFormat) {
530
    case PIX_FMT_RGB48BE:
531
    case PIX_FMT_RGB48LE:    return yuv2rgb_c_48;
532
    case PIX_FMT_ARGB:
533
    case PIX_FMT_ABGR:       if (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) return yuva2argb_c;
534
    case PIX_FMT_RGBA:
535
    case PIX_FMT_BGRA:       return (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) ? yuva2rgba_c : yuv2rgb_c_32;
536
    case PIX_FMT_RGB24:      return yuv2rgb_c_24_rgb;
537
    case PIX_FMT_BGR24:      return yuv2rgb_c_24_bgr;
538
    case PIX_FMT_RGB565:
539
    case PIX_FMT_BGR565:
540
    case PIX_FMT_RGB555:
541
    case PIX_FMT_BGR555:     return yuv2rgb_c_16;
542
    case PIX_FMT_RGB8:
543
    case PIX_FMT_BGR8:       return yuv2rgb_c_8_ordered_dither;
544
    case PIX_FMT_RGB4:
545
    case PIX_FMT_BGR4:       return yuv2rgb_c_4_ordered_dither;
546
    case PIX_FMT_RGB4_BYTE:
547
    case PIX_FMT_BGR4_BYTE:  return yuv2rgb_c_4b_ordered_dither;
548
    case PIX_FMT_MONOBLACK:  return yuv2rgb_c_1_ordered_dither;
549
    default:
550
        assert(0);
551
    }
552
    return NULL;
553
}
554

    
555
static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)
556
{
557
    int i;
558
    int64_t cb = 0;
559

    
560
    y_table -= elemsize * (inc >> 9);
561

    
562
    for (i = 0; i < 256; i++) {
563
        table[i] = y_table + elemsize * (cb >> 16);
564
        cb += inc;
565
    }
566
}
567

    
568
static void fill_gv_table(int table[256], const int elemsize, const int inc)
569
{
570
    int i;
571
    int64_t cb = 0;
572
    int off = -(inc >> 9);
573

    
574
    for (i = 0; i < 256; i++) {
575
        table[i] = elemsize * (off + (cb >> 16));
576
        cb += inc;
577
    }
578
}
579

    
580
av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
581
                                     int brightness, int contrast, int saturation)
582
{
583
    const int isRgb =      c->dstFormat==PIX_FMT_RGB32
584
                        || c->dstFormat==PIX_FMT_RGB32_1
585
                        || c->dstFormat==PIX_FMT_BGR24
586
                        || c->dstFormat==PIX_FMT_RGB565
587
                        || c->dstFormat==PIX_FMT_RGB555
588
                        || c->dstFormat==PIX_FMT_RGB8
589
                        || c->dstFormat==PIX_FMT_RGB4
590
                        || c->dstFormat==PIX_FMT_RGB4_BYTE
591
                        || c->dstFormat==PIX_FMT_MONOBLACK;
592
    const int bpp = fmt_depth(c->dstFormat);
593
    uint8_t *y_table;
594
    uint16_t *y_table16;
595
    uint32_t *y_table32;
596
    int i, base, rbase, gbase, bbase, abase, needAlpha;
597
    const int yoffs = fullRange ? 384 : 326;
598

    
599
    int64_t crv =  inv_table[0];
600
    int64_t cbu =  inv_table[1];
601
    int64_t cgu = -inv_table[2];
602
    int64_t cgv = -inv_table[3];
603
    int64_t cy  = 1<<16;
604
    int64_t oy  = 0;
605

    
606
    int64_t yb = 0;
607

    
608
    if (!fullRange) {
609
        cy = (cy*255) / 219;
610
        oy = 16<<16;
611
    } else {
612
        crv = (crv*224) / 255;
613
        cbu = (cbu*224) / 255;
614
        cgu = (cgu*224) / 255;
615
        cgv = (cgv*224) / 255;
616
    }
617

    
618
    cy  = (cy *contrast             ) >> 16;
619
    crv = (crv*contrast * saturation) >> 32;
620
    cbu = (cbu*contrast * saturation) >> 32;
621
    cgu = (cgu*contrast * saturation) >> 32;
622
    cgv = (cgv*contrast * saturation) >> 32;
623
    oy -= 256*brightness;
624

    
625
    //scale coefficients by cy
626
    crv = ((crv << 16) + 0x8000) / cy;
627
    cbu = ((cbu << 16) + 0x8000) / cy;
628
    cgu = ((cgu << 16) + 0x8000) / cy;
629
    cgv = ((cgv << 16) + 0x8000) / cy;
630

    
631
    av_free(c->yuvTable);
632

    
633
    switch (bpp) {
634
    case 1:
635
        c->yuvTable = av_malloc(1024);
636
        y_table = c->yuvTable;
637
        yb = -(384<<16) - oy;
638
        for (i = 0; i < 1024-110; i++) {
639
            y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;
640
            yb += cy;
641
        }
642
        fill_table(c->table_gU, 1, cgu, y_table + yoffs);
643
        fill_gv_table(c->table_gV, 1, cgv);
644
        break;
645
    case 4:
646
    case 4|128:
647
        rbase = isRgb ? 3 : 0;
648
        gbase = 1;
649
        bbase = isRgb ? 0 : 3;
650
        c->yuvTable = av_malloc(1024*3);
651
        y_table = c->yuvTable;
652
        yb = -(384<<16) - oy;
653
        for (i = 0; i < 1024-110; i++) {
654
            int yval = av_clip_uint8((yb + 0x8000) >> 16);
655
            y_table[i+110     ] =  (yval >> 7)       << rbase;
656
            y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;
657
            y_table[i+110+2048] =  (yval >> 7)       << bbase;
658
            yb += cy;
659
        }
660
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
661
        fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
662
        fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
663
        fill_gv_table(c->table_gV, 1, cgv);
664
        break;
665
    case 8:
666
        rbase = isRgb ? 5 : 0;
667
        gbase = isRgb ? 2 : 3;
668
        bbase = isRgb ? 0 : 6;
669
        c->yuvTable = av_malloc(1024*3);
670
        y_table = c->yuvTable;
671
        yb = -(384<<16) - oy;
672
        for (i = 0; i < 1024-38; i++) {
673
            int yval = av_clip_uint8((yb + 0x8000) >> 16);
674
            y_table[i+16     ] = ((yval + 18) / 36) << rbase;
675
            y_table[i+16+1024] = ((yval + 18) / 36) << gbase;
676
            y_table[i+37+2048] = ((yval + 43) / 85) << bbase;
677
            yb += cy;
678
        }
679
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
680
        fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
681
        fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
682
        fill_gv_table(c->table_gV, 1, cgv);
683
        break;
684
    case 15:
685
    case 16:
686
        rbase = isRgb ? bpp - 5 : 0;
687
        gbase = 5;
688
        bbase = isRgb ? 0 : (bpp - 5);
689
        c->yuvTable = av_malloc(1024*3*2);
690
        y_table16 = c->yuvTable;
691
        yb = -(384<<16) - oy;
692
        for (i = 0; i < 1024; i++) {
693
            uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
694
            y_table16[i     ] = (yval >> 3)          << rbase;
695
            y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;
696
            y_table16[i+2048] = (yval >> 3)          << bbase;
697
            yb += cy;
698
        }
699
        fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
700
        fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
701
        fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
702
        fill_gv_table(c->table_gV, 2, cgv);
703
        break;
704
    case 24:
705
    case 48:
706
        c->yuvTable = av_malloc(1024);
707
        y_table = c->yuvTable;
708
        yb = -(384<<16) - oy;
709
        for (i = 0; i < 1024; i++) {
710
            y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);
711
            yb += cy;
712
        }
713
        fill_table(c->table_rV, 1, crv, y_table + yoffs);
714
        fill_table(c->table_gU, 1, cgu, y_table + yoffs);
715
        fill_table(c->table_bU, 1, cbu, y_table + yoffs);
716
        fill_gv_table(c->table_gV, 1, cgv);
717
        break;
718
    case 32:
719
        base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;
720
        rbase = base + (isRgb ? 16 : 0);
721
        gbase = base + 8;
722
        bbase = base + (isRgb ? 0 : 16);
723
        needAlpha = CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat);
724
        if (!needAlpha)
725
            abase = (base + 24) & 31;
726
        c->yuvTable = av_malloc(1024*3*4);
727
        y_table32 = c->yuvTable;
728
        yb = -(384<<16) - oy;
729
        for (i = 0; i < 1024; i++) {
730
            uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
731
            y_table32[i     ] = (yval << rbase) + (needAlpha ? 0 : (255 << abase));
732
            y_table32[i+1024] = yval << gbase;
733
            y_table32[i+2048] = yval << bbase;
734
            yb += cy;
735
        }
736
        fill_table(c->table_rV, 4, crv, y_table32 + yoffs);
737
        fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);
738
        fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);
739
        fill_gv_table(c->table_gV, 4, cgv);
740
        break;
741
    default:
742
        c->yuvTable = NULL;
743
        av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);
744
        return -1;
745
    }
746
    return 0;
747
}