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FFmpeg/libswscale/yuv2rgb.c

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  1. /*

  2.  * software YUV to RGB converter

  3.  *

  4.  * Copyright (C) 2009 Konstantin Shishkov

  5.  *

  6.  * 1,4,8bpp support and context / deglobalize stuff

  7.  * by Michael Niedermayer (michaelni@gmx.at)

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

  11.  * FFmpeg is free software; you can redistribute it and/or

  12.  * modify it under the terms of the GNU Lesser General Public

  13.  * License as published by the Free Software Foundation; either

  14.  * version 2.1 of the License, or (at your option) any later version.

  15.  *

  16.  * FFmpeg is distributed in the hope that it will be useful,

  17.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  18.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  19.  * Lesser General Public License for more details.

  20.  *

  21.  * You should have received a copy of the GNU Lesser General Public

  22.  * License along with FFmpeg; if not, write to the Free Software

  23.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  24.  */

  25. 

  26. #include <stdio.h>

  27. #include <stdlib.h>

  28. #include <inttypes.h>

  29. #include <assert.h>

  30. 

  31. #include "config.h"

  32. #include "rgb2rgb.h"

  33. #include "swscale.h"

  34. #include "swscale_internal.h"

  35. #include "libavutil/x86_cpu.h"

  36. 

  37. extern const uint8_t dither_8x8_32[8][8];

  38. extern const uint8_t dither_8x8_73[8][8];

  39. extern const uint8_t dither_8x8_220[8][8];

  40. 

  41. const int32_t ff_yuv2rgb_coeffs[8][4] = {

  42.     {117504, 138453, 13954, 34903}, /* no sequence_display_extension */

  43.     {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */

  44.     {104597, 132201, 25675, 53279}, /* unspecified */

  45.     {104597, 132201, 25675, 53279}, /* reserved */

  46.     {104448, 132798, 24759, 53109}, /* FCC */

  47.     {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */

  48.     {104597, 132201, 25675, 53279}, /* SMPTE 170M */

  49.     {117579, 136230, 16907, 35559}  /* SMPTE 240M (1987) */

  50. };

  51. 

  52. #define LOADCHROMA(i)                               \

  53.     U = pu[i];                                      \

  54.     V = pv[i];                                      \

  55.     r = (void *)c->table_rV[V];                     \

  56.     g = (void *)(c->table_gU[U] + c->table_gV[V]);  \

  57.     b = (void *)c->table_bU[U];

  58. 

  59. #define PUTRGB(dst,src,i,o)          \

  60.     Y = src[2*i+o];                  \

  61.     dst[2*i  ] = r[Y] + g[Y] + b[Y]; \

  62.     Y = src[2*i+1-o];                \

  63.     dst[2*i+1] = r[Y] + g[Y] + b[Y];

  64. 

  65. #define PUTRGB24(dst,src,i)                                  \

  66.     Y = src[2*i];                                            \

  67.     dst[6*i+0] = r[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = b[Y]; \

  68.     Y = src[2*i+1];                                          \

  69.     dst[6*i+3] = r[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = b[Y];

  70. 

  71. #define PUTBGR24(dst,src,i)                                  \

  72.     Y = src[2*i];                                            \

  73.     dst[6*i+0] = b[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = r[Y]; \

  74.     Y = src[2*i+1];                                          \

  75.     dst[6*i+3] = b[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = r[Y];

  76. 

  77. #define PUTRGBA(dst,ysrc,asrc,i,o,s)                    \

  78.     Y = ysrc[2*i+o];                                    \

  79.     dst[2*i  ] = r[Y] + g[Y] + b[Y] + (asrc[2*i  ]<<s); \

  80.     Y = ysrc[2*i+1-o];                                  \

  81.     dst[2*i+1] = r[Y] + g[Y] + b[Y] + (asrc[2*i+1]<<s);

  82. 

  83. #define YUV2RGBFUNC(func_name, dst_type, alpha) \

  84. static int func_name(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, \

  85.                      int srcSliceH, uint8_t* dst[], int dstStride[]){\

  86.     int y;\

  87. \

  88.     if (!alpha && c->srcFormat == PIX_FMT_YUV422P) {\

  89.         srcStride[1] *= 2;\

  90.         srcStride[2] *= 2;\

  91.     }\

  92.     for (y=0; y<srcSliceH; y+=2) {\

  93.         dst_type *dst_1 = (dst_type*)(dst[0] + (y+srcSliceY  )*dstStride[0]);\

  94.         dst_type *dst_2 = (dst_type*)(dst[0] + (y+srcSliceY+1)*dstStride[0]);\

  95.         dst_type av_unused *r, *b;\

  96.         dst_type *g;\

  97.         uint8_t *py_1 = src[0] + y*srcStride[0];\

  98.         uint8_t *py_2 = py_1 + srcStride[0];\

  99.         uint8_t *pu = src[1] + (y>>1)*srcStride[1];\

  100.         uint8_t *pv = src[2] + (y>>1)*srcStride[2];\

  101.         uint8_t av_unused *pa_1, *pa_2;\

  102.         unsigned int h_size = c->dstW>>3;\

  103.         if (alpha){\

  104.             pa_1 = src[3] + y*srcStride[3];\

  105.             pa_2 = pa_1 + srcStride[3];\

  106.         }\

  107.         while (h_size--) {\

  108.             int av_unused U, V;\

  109.             int Y;\

  110. 

  111. #define ENDYUV2RGBLINE(dst_delta)\

  112.             pu += 4;\

  113.             pv += 4;\

  114.             py_1 += 8;\

  115.             py_2 += 8;\

  116.             dst_1 += dst_delta;\

  117.             dst_2 += dst_delta;\

  118.         }\

  119.         if (c->dstW & 4) {\

  120.             int av_unused Y, U, V;\

  121. 

  122. #define ENDYUV2RGBFUNC()\

  123.         }\

  124.     }\

  125.     return srcSliceH;\

  126. }

  127. 

  128. #define CLOSEYUV2RGBFUNC(dst_delta)\

  129.     ENDYUV2RGBLINE(dst_delta)\

  130.     ENDYUV2RGBFUNC()

  131. 

  132. YUV2RGBFUNC(yuv2rgb_c_32, uint32_t, 0)

  133.     LOADCHROMA(0);

  134.     PUTRGB(dst_1,py_1,0,0);

  135.     PUTRGB(dst_2,py_2,0,1);

  136. 

  137.     LOADCHROMA(1);

  138.     PUTRGB(dst_2,py_2,1,1);

  139.     PUTRGB(dst_1,py_1,1,0);

  140.     LOADCHROMA(1);

  141.     PUTRGB(dst_2,py_2,1,1);

  142.     PUTRGB(dst_1,py_1,1,0);

  143. 

  144.     LOADCHROMA(2);

  145.     PUTRGB(dst_1,py_1,2,0);

  146.     PUTRGB(dst_2,py_2,2,1);

  147. 

  148.     LOADCHROMA(3);

  149.     PUTRGB(dst_2,py_2,3,1);

  150.     PUTRGB(dst_1,py_1,3,0);

  151. ENDYUV2RGBLINE(8)

  152.     LOADCHROMA(0);

  153.     PUTRGB(dst_1,py_1,0,0);

  154.     PUTRGB(dst_2,py_2,0,1);

  155. 

  156.     LOADCHROMA(1);

  157.     PUTRGB(dst_2,py_2,1,1);

  158.     PUTRGB(dst_1,py_1,1,0);

  159. ENDYUV2RGBFUNC()

  160. 

  161. YUV2RGBFUNC(yuva2rgba_c, uint32_t, 1)

  162.     LOADCHROMA(0);

  163.     PUTRGBA(dst_1,py_1,pa_1,0,0,24);

  164.     PUTRGBA(dst_2,py_2,pa_2,0,1,24);

  165. 

  166.     LOADCHROMA(1);

  167.     PUTRGBA(dst_2,py_2,pa_1,1,1,24);

  168.     PUTRGBA(dst_1,py_1,pa_2,1,0,24);

  169.     LOADCHROMA(1);

  170.     PUTRGBA(dst_2,py_2,pa_1,1,1,24);

  171.     PUTRGBA(dst_1,py_1,pa_2,1,0,24);

  172. 

  173.     LOADCHROMA(2);

  174.     PUTRGBA(dst_1,py_1,pa_1,2,0,24);

  175.     PUTRGBA(dst_2,py_2,pa_2,2,1,24);

  176. 

  177.     LOADCHROMA(3);

  178.     PUTRGBA(dst_2,py_2,pa_1,3,1,24);

  179.     PUTRGBA(dst_1,py_1,pa_2,3,0,24);

  180.     pa_1 += 8;\

  181.     pa_2 += 8;\

  182. ENDYUV2RGBLINE(8)

  183.     LOADCHROMA(0);

  184.     PUTRGBA(dst_1,py_1,pa_1,0,0,24);

  185.     PUTRGBA(dst_2,py_2,pa_2,0,1,24);

  186. 

  187.     LOADCHROMA(1);

  188.     PUTRGBA(dst_2,py_2,pa_1,1,1,24);

  189.     PUTRGBA(dst_1,py_1,pa_2,1,0,24);

  190. ENDYUV2RGBFUNC()

  191. 

  192. YUV2RGBFUNC(yuva2argb_c, uint32_t, 1)

  193.     LOADCHROMA(0);

  194.     PUTRGBA(dst_1,py_1,pa_1,0,0,0);

  195.     PUTRGBA(dst_2,py_2,pa_2,0,1,0);

  196. 

  197.     LOADCHROMA(1);

  198.     PUTRGBA(dst_2,py_2,pa_2,1,1,0);

  199.     PUTRGBA(dst_1,py_1,pa_1,1,0,0);

  200.     LOADCHROMA(1);

  201.     PUTRGBA(dst_2,py_2,pa_2,1,1,0);

  202.     PUTRGBA(dst_1,py_1,pa_1,1,0,0);

  203. 

  204.     LOADCHROMA(2);

  205.     PUTRGBA(dst_1,py_1,pa_1,2,0,0);

  206.     PUTRGBA(dst_2,py_2,pa_2,2,1,0);

  207. 

  208.     LOADCHROMA(3);

  209.     PUTRGBA(dst_2,py_2,pa_2,3,1,0);

  210.     PUTRGBA(dst_1,py_1,pa_1,3,0,0);

  211.     pa_1 += 8;\

  212.     pa_2 += 8;\

  213. ENDYUV2RGBLINE(8)

  214.     LOADCHROMA(0);

  215.     PUTRGBA(dst_1,py_1,pa_1,0,0,0);

  216.     PUTRGBA(dst_2,py_2,pa_2,0,1,0);

  217. 

  218.     LOADCHROMA(1);

  219.     PUTRGBA(dst_2,py_2,pa_2,1,1,0);

  220.     PUTRGBA(dst_1,py_1,pa_1,1,0,0);

  221. ENDYUV2RGBFUNC()

  222. 

  223. YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t, 0)

  224.     LOADCHROMA(0);

  225.     PUTRGB24(dst_1,py_1,0);

  226.     PUTRGB24(dst_2,py_2,0);

  227. 

  228.     LOADCHROMA(1);

  229.     PUTRGB24(dst_2,py_2,1);

  230.     PUTRGB24(dst_1,py_1,1);

  231. 

  232.     LOADCHROMA(2);

  233.     PUTRGB24(dst_1,py_1,2);

  234.     PUTRGB24(dst_2,py_2,2);

  235. 

  236.     LOADCHROMA(3);

  237.     PUTRGB24(dst_2,py_2,3);

  238.     PUTRGB24(dst_1,py_1,3);

  239. ENDYUV2RGBLINE(24)

  240.     LOADCHROMA(0);

  241.     PUTRGB24(dst_1,py_1,0);

  242.     PUTRGB24(dst_2,py_2,0);

  243. 

  244.     LOADCHROMA(1);

  245.     PUTRGB24(dst_2,py_2,1);

  246.     PUTRGB24(dst_1,py_1,1);

  247. ENDYUV2RGBFUNC()

  248. 

  249. // only trivial mods from yuv2rgb_c_24_rgb

  250. YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t, 0)

  251.     LOADCHROMA(0);

  252.     PUTBGR24(dst_1,py_1,0);

  253.     PUTBGR24(dst_2,py_2,0);

  254. 

  255.     LOADCHROMA(1);

  256.     PUTBGR24(dst_2,py_2,1);

  257.     PUTBGR24(dst_1,py_1,1);

  258. 

  259.     LOADCHROMA(2);

  260.     PUTBGR24(dst_1,py_1,2);

  261.     PUTBGR24(dst_2,py_2,2);

  262. 

  263.     LOADCHROMA(3);

  264.     PUTBGR24(dst_2,py_2,3);

  265.     PUTBGR24(dst_1,py_1,3);

  266. ENDYUV2RGBLINE(24)

  267.     LOADCHROMA(0);

  268.     PUTBGR24(dst_1,py_1,0);

  269.     PUTBGR24(dst_2,py_2,0);

  270. 

  271.     LOADCHROMA(1);

  272.     PUTBGR24(dst_2,py_2,1);

  273.     PUTBGR24(dst_1,py_1,1);

  274. ENDYUV2RGBFUNC()

  275. 

  276. // This is exactly the same code as yuv2rgb_c_32 except for the types of

  277. // r, g, b, dst_1, dst_2

  278. YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0)

  279.     LOADCHROMA(0);

  280.     PUTRGB(dst_1,py_1,0,0);

  281.     PUTRGB(dst_2,py_2,0,1);

  282. 

  283.     LOADCHROMA(1);

  284.     PUTRGB(dst_2,py_2,1,1);

  285.     PUTRGB(dst_1,py_1,1,0);

  286. 

  287.     LOADCHROMA(2);

  288.     PUTRGB(dst_1,py_1,2,0);

  289.     PUTRGB(dst_2,py_2,2,1);

  290. 

  291.     LOADCHROMA(3);

  292.     PUTRGB(dst_2,py_2,3,1);

  293.     PUTRGB(dst_1,py_1,3,0);

  294. CLOSEYUV2RGBFUNC(8)

  295. 

  296. // This is exactly the same code as yuv2rgb_c_32 except for the types of

  297. // r, g, b, dst_1, dst_2

  298. YUV2RGBFUNC(yuv2rgb_c_8, uint8_t, 0)

  299.     LOADCHROMA(0);

  300.     PUTRGB(dst_1,py_1,0,0);

  301.     PUTRGB(dst_2,py_2,0,1);

  302. 

  303.     LOADCHROMA(1);

  304.     PUTRGB(dst_2,py_2,1,1);

  305.     PUTRGB(dst_1,py_1,1,0);

  306. 

  307.     LOADCHROMA(2);

  308.     PUTRGB(dst_1,py_1,2,0);

  309.     PUTRGB(dst_2,py_2,2,1);

  310. 

  311.     LOADCHROMA(3);

  312.     PUTRGB(dst_2,py_2,3,1);

  313.     PUTRGB(dst_1,py_1,3,0);

  314. CLOSEYUV2RGBFUNC(8)

  315. 

  316. // r, g, b, dst_1, dst_2

  317. YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t, 0)

  318.     const uint8_t *d32 = dither_8x8_32[y&7];

  319.     const uint8_t *d64 = dither_8x8_73[y&7];

  320. #define PUTRGB8(dst,src,i,o)                                    \

  321.     Y = src[2*i];                                               \

  322.     dst[2*i]   = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \

  323.     Y = src[2*i+1];                                             \

  324.     dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];

  325. 

  326.     LOADCHROMA(0);

  327.     PUTRGB8(dst_1,py_1,0,0);

  328.     PUTRGB8(dst_2,py_2,0,0+8);

  329. 

  330.     LOADCHROMA(1);

  331.     PUTRGB8(dst_2,py_2,1,2+8);

  332.     PUTRGB8(dst_1,py_1,1,2);

  333. 

  334.     LOADCHROMA(2);

  335.     PUTRGB8(dst_1,py_1,2,4);

  336.     PUTRGB8(dst_2,py_2,2,4+8);

  337. 

  338.     LOADCHROMA(3);

  339.     PUTRGB8(dst_2,py_2,3,6+8);

  340.     PUTRGB8(dst_1,py_1,3,6);

  341. CLOSEYUV2RGBFUNC(8)

  342. 

  343. 

  344. // This is exactly the same code as yuv2rgb_c_32 except for the types of

  345. // r, g, b, dst_1, dst_2

  346. YUV2RGBFUNC(yuv2rgb_c_4, uint8_t, 0)

  347.     int acc;

  348. #define PUTRGB4(dst,src,i)          \

  349.     Y = src[2*i];                   \

  350.     acc = r[Y] + g[Y] + b[Y];       \

  351.     Y = src[2*i+1];                 \

  352.     acc |= (r[Y] + g[Y] + b[Y])<<4; \

  353.     dst[i] = acc;

  354. 

  355.     LOADCHROMA(0);

  356.     PUTRGB4(dst_1,py_1,0);

  357.     PUTRGB4(dst_2,py_2,0);

  358. 

  359.     LOADCHROMA(1);

  360.     PUTRGB4(dst_2,py_2,1);

  361.     PUTRGB4(dst_1,py_1,1);

  362. 

  363.     LOADCHROMA(2);

  364.     PUTRGB4(dst_1,py_1,2);

  365.     PUTRGB4(dst_2,py_2,2);

  366. 

  367.     LOADCHROMA(3);

  368.     PUTRGB4(dst_2,py_2,3);

  369.     PUTRGB4(dst_1,py_1,3);

  370. CLOSEYUV2RGBFUNC(4)

  371. 

  372. YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t, 0)

  373.     const uint8_t *d64 =  dither_8x8_73[y&7];

  374.     const uint8_t *d128 = dither_8x8_220[y&7];

  375.     int acc;

  376. 

  377. #define PUTRGB4D(dst,src,i,o)                                     \

  378.     Y = src[2*i];                                                 \

  379.     acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]];        \

  380.     Y = src[2*i+1];                                               \

  381.     acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4;  \

  382.     dst[i]= acc;

  383. 

  384.     LOADCHROMA(0);

  385.     PUTRGB4D(dst_1,py_1,0,0);

  386.     PUTRGB4D(dst_2,py_2,0,0+8);

  387. 

  388.     LOADCHROMA(1);

  389.     PUTRGB4D(dst_2,py_2,1,2+8);

  390.     PUTRGB4D(dst_1,py_1,1,2);

  391. 

  392.     LOADCHROMA(2);

  393.     PUTRGB4D(dst_1,py_1,2,4);

  394.     PUTRGB4D(dst_2,py_2,2,4+8);

  395. 

  396.     LOADCHROMA(3);

  397.     PUTRGB4D(dst_2,py_2,3,6+8);

  398.     PUTRGB4D(dst_1,py_1,3,6);

  399. CLOSEYUV2RGBFUNC(4)

  400. 

  401. // This is exactly the same code as yuv2rgb_c_32 except for the types of

  402. // r, g, b, dst_1, dst_2

  403. YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t, 0)

  404.     LOADCHROMA(0);

  405.     PUTRGB(dst_1,py_1,0,0);

  406.     PUTRGB(dst_2,py_2,0,1);

  407. 

  408.     LOADCHROMA(1);

  409.     PUTRGB(dst_2,py_2,1,1);

  410.     PUTRGB(dst_1,py_1,1,0);

  411. 

  412.     LOADCHROMA(2);

  413.     PUTRGB(dst_1,py_1,2,0);

  414.     PUTRGB(dst_2,py_2,2,1);

  415. 

  416.     LOADCHROMA(3);

  417.     PUTRGB(dst_2,py_2,3,1);

  418.     PUTRGB(dst_1,py_1,3,0);

  419. CLOSEYUV2RGBFUNC(8)

  420. 

  421. YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t, 0)

  422.     const uint8_t *d64 =  dither_8x8_73[y&7];

  423.     const uint8_t *d128 = dither_8x8_220[y&7];

  424. 

  425. #define PUTRGB4DB(dst,src,i,o)                                    \

  426.     Y = src[2*i];                                                 \

  427.     dst[2*i]   = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \

  428.     Y = src[2*i+1];                                               \

  429.     dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];

  430. 

  431.     LOADCHROMA(0);

  432.     PUTRGB4DB(dst_1,py_1,0,0);

  433.     PUTRGB4DB(dst_2,py_2,0,0+8);

  434. 

  435.     LOADCHROMA(1);

  436.     PUTRGB4DB(dst_2,py_2,1,2+8);

  437.     PUTRGB4DB(dst_1,py_1,1,2);

  438. 

  439.     LOADCHROMA(2);

  440.     PUTRGB4DB(dst_1,py_1,2,4);

  441.     PUTRGB4DB(dst_2,py_2,2,4+8);

  442. 

  443.     LOADCHROMA(3);

  444.     PUTRGB4DB(dst_2,py_2,3,6+8);

  445.     PUTRGB4DB(dst_1,py_1,3,6);

  446. CLOSEYUV2RGBFUNC(8)

  447. 

  448. YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)

  449.         const uint8_t *d128 = dither_8x8_220[y&7];

  450.         char out_1 = 0, out_2 = 0;

  451.         g= c->table_gU[128] + c->table_gV[128];

  452. 

  453. #define PUTRGB1(out,src,i,o)    \

  454.     Y = src[2*i];               \

  455.     out+= out + g[Y+d128[0+o]]; \

  456.     Y = src[2*i+1];             \

  457.     out+= out + g[Y+d128[1+o]];

  458. 

  459.     PUTRGB1(out_1,py_1,0,0);

  460.     PUTRGB1(out_2,py_2,0,0+8);

  461. 

  462.     PUTRGB1(out_2,py_2,1,2+8);

  463.     PUTRGB1(out_1,py_1,1,2);

  464. 

  465.     PUTRGB1(out_1,py_1,2,4);

  466.     PUTRGB1(out_2,py_2,2,4+8);

  467. 

  468.     PUTRGB1(out_2,py_2,3,6+8);

  469.     PUTRGB1(out_1,py_1,3,6);

  470. 

  471.     dst_1[0]= out_1;

  472.     dst_2[0]= out_2;

  473. CLOSEYUV2RGBFUNC(1)

  474. 

  475. SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)

  476. {

  477.     SwsFunc t = NULL;

  478. #if (HAVE_MMX2 || HAVE_MMX) && CONFIG_GPL

  479.      t = ff_yuv2rgb_init_mmx(c);

  480. #endif

  481. #if HAVE_VIS

  482.     t = ff_yuv2rgb_init_vis(c);

  483. #endif

  484. #if CONFIG_MLIB

  485.     t = ff_yuv2rgb_init_mlib(c);

  486. #endif

  487. #if HAVE_ALTIVEC && CONFIG_GPL

  488.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  489.         t = ff_yuv2rgb_init_altivec(c);

  490. #endif

  491. 

  492. #if ARCH_BFIN

  493.     if (c->flags & SWS_CPU_CAPS_BFIN)

  494.         t = ff_yuv2rgb_get_func_ptr_bfin(c);

  495. #endif

  496. 

  497.     if (t)

  498.         return t;

  499. 

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

  501. 

  502.     switch (c->dstFormat) {

  503.     case PIX_FMT_ARGB:

  504.     case PIX_FMT_ABGR:       if (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) return yuva2argb_c;

  505.     case PIX_FMT_RGBA:

  506.     case PIX_FMT_BGRA:       return (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) ? yuva2rgba_c : yuv2rgb_c_32;

  507.     case PIX_FMT_RGB24:      return yuv2rgb_c_24_rgb;

  508.     case PIX_FMT_BGR24:      return yuv2rgb_c_24_bgr;

  509.     case PIX_FMT_RGB565:

  510.     case PIX_FMT_BGR565:

  511.     case PIX_FMT_RGB555:

  512.     case PIX_FMT_BGR555:     return yuv2rgb_c_16;

  513.     case PIX_FMT_RGB8:

  514.     case PIX_FMT_BGR8:       return yuv2rgb_c_8_ordered_dither;

  515.     case PIX_FMT_RGB4:

  516.     case PIX_FMT_BGR4:       return yuv2rgb_c_4_ordered_dither;

  517.     case PIX_FMT_RGB4_BYTE:

  518.     case PIX_FMT_BGR4_BYTE:  return yuv2rgb_c_4b_ordered_dither;

  519.     case PIX_FMT_MONOBLACK:  return yuv2rgb_c_1_ordered_dither;

  520.     default:

  521.         assert(0);

  522.     }

  523.     return NULL;

  524. }

  525. 

  526. static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)

  527. {

  528.     int i;

  529.     int64_t cb = 0;

  530. 

  531.     y_table -= elemsize * (inc >> 9);

  532. 

  533.     for (i = 0; i < 256; i++) {

  534.         table[i] = y_table + elemsize * (cb >> 16);

  535.         cb += inc;

  536.     }

  537. }

  538. 

  539. static void fill_gv_table(int table[256], const int elemsize, const int inc)

  540. {

  541.     int i;

  542.     int64_t cb = 0;

  543.     int off = -(inc >> 9);

  544. 

  545.     for (i = 0; i < 256; i++) {

  546.         table[i] = elemsize * (off + (cb >> 16));

  547.         cb += inc;

  548.     }

  549. }

  550. 

  551. av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,

  552.                                      int brightness, int contrast, int saturation)

  553. {

  554.     const int isRgb =      c->dstFormat==PIX_FMT_RGB32

  555.                         || c->dstFormat==PIX_FMT_RGB32_1

  556.                         || c->dstFormat==PIX_FMT_BGR24

  557.                         || c->dstFormat==PIX_FMT_RGB565

  558.                         || c->dstFormat==PIX_FMT_RGB555

  559.                         || c->dstFormat==PIX_FMT_RGB8

  560.                         || c->dstFormat==PIX_FMT_RGB4

  561.                         || c->dstFormat==PIX_FMT_RGB4_BYTE

  562.                         || c->dstFormat==PIX_FMT_MONOBLACK;

  563.     const int bpp = fmt_depth(c->dstFormat);

  564.     uint8_t *y_table;

  565.     uint16_t *y_table16;

  566.     uint32_t *y_table32;

  567.     int i, base, rbase, gbase, bbase, abase, needAlpha;

  568.     const int yoffs = fullRange ? 384 : 326;

  569. 

  570.     int64_t crv =  inv_table[0];

  571.     int64_t cbu =  inv_table[1];

  572.     int64_t cgu = -inv_table[2];

  573.     int64_t cgv = -inv_table[3];

  574.     int64_t cy  = 1<<16;

  575.     int64_t oy  = 0;

  576. 

  577.     int64_t yb = 0;

  578. 

  579.     if (!fullRange) {

  580.         cy = (cy*255) / 219;

  581.         oy = 16<<16;

  582.     } else {

  583.         crv = (crv*224) / 255;

  584.         cbu = (cbu*224) / 255;

  585.         cgu = (cgu*224) / 255;

  586.         cgv = (cgv*224) / 255;

  587.     }

  588. 

  589.     cy  = (cy *contrast             ) >> 16;

  590.     crv = (crv*contrast * saturation) >> 32;

  591.     cbu = (cbu*contrast * saturation) >> 32;

  592.     cgu = (cgu*contrast * saturation) >> 32;

  593.     cgv = (cgv*contrast * saturation) >> 32;

  594.     oy -= 256*brightness;

  595. 

  596.     //scale coefficients by cy

  597.     crv = ((crv << 16) + 0x8000) / cy;

  598.     cbu = ((cbu << 16) + 0x8000) / cy;

  599.     cgu = ((cgu << 16) + 0x8000) / cy;

  600.     cgv = ((cgv << 16) + 0x8000) / cy;

  601. 

  602.     av_free(c->yuvTable);

  603. 

  604.     switch (bpp) {

  605.     case 1:

  606.         c->yuvTable = av_malloc(1024);

  607.         y_table = c->yuvTable;

  608.         yb = -(384<<16) - oy;

  609.         for (i = 0; i < 1024-110; i++) {

  610.             y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;

  611.             yb += cy;

  612.         }

  613.         fill_table(c->table_gU, 1, cgu, y_table + yoffs);

  614.         fill_gv_table(c->table_gV, 1, cgv);

  615.         break;

  616.     case 4:

  617.     case 4|128:

  618.         rbase = isRgb ? 3 : 0;

  619.         gbase = 1;

  620.         bbase = isRgb ? 0 : 3;

  621.         c->yuvTable = av_malloc(1024*3);

  622.         y_table = c->yuvTable;

  623.         yb = -(384<<16) - oy;

  624.         for (i = 0; i < 1024-110; i++) {

  625.             int yval = av_clip_uint8((yb + 0x8000) >> 16);

  626.             y_table[i+110     ] =  (yval >> 7)       << rbase;

  627.             y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;

  628.             y_table[i+110+2048] =  (yval >> 7)       << bbase;

  629.             yb += cy;

  630.         }

  631.         fill_table(c->table_rV, 1, crv, y_table + yoffs);

  632.         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);

  633.         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);

  634.         fill_gv_table(c->table_gV, 1, cgv);

  635.         break;

  636.     case 8:

  637.         rbase = isRgb ? 5 : 0;

  638.         gbase = isRgb ? 2 : 3;

  639.         bbase = isRgb ? 0 : 6;

  640.         c->yuvTable = av_malloc(1024*3);

  641.         y_table = c->yuvTable;

  642.         yb = -(384<<16) - oy;

  643.         for (i = 0; i < 1024-38; i++) {

  644.             int yval = av_clip_uint8((yb + 0x8000) >> 16);

  645.             y_table[i+16     ] = ((yval + 18) / 36) << rbase;

  646.             y_table[i+16+1024] = ((yval + 18) / 36) << gbase;

  647.             y_table[i+37+2048] = ((yval + 43) / 85) << bbase;

  648.             yb += cy;

  649.         }

  650.         fill_table(c->table_rV, 1, crv, y_table + yoffs);

  651.         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);

  652.         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);

  653.         fill_gv_table(c->table_gV, 1, cgv);

  654.         break;

  655.     case 15:

  656.     case 16:

  657.         rbase = isRgb ? bpp - 5 : 0;

  658.         gbase = 5;

  659.         bbase = isRgb ? 0 : (bpp - 5);

  660.         c->yuvTable = av_malloc(1024*3*2);

  661.         y_table16 = c->yuvTable;

  662.         yb = -(384<<16) - oy;

  663.         for (i = 0; i < 1024; i++) {

  664.             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);

  665.             y_table16[i     ] = (yval >> 3)          << rbase;

  666.             y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;

  667.             y_table16[i+2048] = (yval >> 3)          << bbase;

  668.             yb += cy;

  669.         }

  670.         fill_table(c->table_rV, 2, crv, y_table16 + yoffs);

  671.         fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);

  672.         fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);

  673.         fill_gv_table(c->table_gV, 2, cgv);

  674.         break;

  675.     case 24:

  676.         c->yuvTable = av_malloc(1024);

  677.         y_table = c->yuvTable;

  678.         yb = -(384<<16) - oy;

  679.         for (i = 0; i < 1024; i++) {

  680.             y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);

  681.             yb += cy;

  682.         }

  683.         fill_table(c->table_rV, 1, crv, y_table + yoffs);

  684.         fill_table(c->table_gU, 1, cgu, y_table + yoffs);

  685.         fill_table(c->table_bU, 1, cbu, y_table + yoffs);

  686.         fill_gv_table(c->table_gV, 1, cgv);

  687.         break;

  688.     case 32:

  689.         base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;

  690.         rbase = base + (isRgb ? 16 : 0);

  691.         gbase = base + 8;

  692.         bbase = base + (isRgb ? 0 : 16);

  693.         needAlpha = CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat);

  694.         if (!needAlpha)

  695.             abase = (base + 24) & 31;

  696.         c->yuvTable = av_malloc(1024*3*4);

  697.         y_table32 = c->yuvTable;

  698.         yb = -(384<<16) - oy;

  699.         for (i = 0; i < 1024; i++) {

  700.             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);

  701.             y_table32[i     ] = (yval << rbase) + (needAlpha ? 0 : (255 << abase));

  702.             y_table32[i+1024] = yval << gbase;

  703.             y_table32[i+2048] = yval << bbase;

  704.             yb += cy;

  705.         }

  706.         fill_table(c->table_rV, 4, crv, y_table32 + yoffs);

  707.         fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);

  708.         fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);

  709.         fill_gv_table(c->table_gV, 4, cgv);

  710.         break;

  711.     default:

  712.         c->yuvTable = NULL;

  713.         av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);

  714.         return -1;

  715.     }

  716.     return 0;

  717. }