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FFmpeg/libswscale/swscale_unscaled.c

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  1. /*

  2.  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

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

  19.  */

  20. 

  21. #include <inttypes.h>

  22. #include <string.h>

  23. #include <math.h>

  24. #include <stdio.h>

  25. #include "config.h"

  26. #include "swscale.h"

  27. #include "swscale_internal.h"

  28. #include "rgb2rgb.h"

  29. #include "libavutil/intreadwrite.h"

  30. #include "libavutil/cpu.h"

  31. #include "libavutil/avutil.h"

  32. #include "libavutil/mathematics.h"

  33. #include "libavutil/bswap.h"

  34. #include "libavutil/pixdesc.h"

  35. #include "libavutil/avassert.h"

  36. 

  37. DECLARE_ALIGNED(8, static const uint8_t, dithers)[8][8][8]={

  38. {

  39.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  40.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  41.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  42.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  43.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  44.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  45.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  46.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  47. },{

  48.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  49.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  50.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  51.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  52.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  53.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  54.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  55.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  56. },{

  57.   {   2,  4,  3,  5,  2,  4,  3,  5,},

  58.   {   6,  0,  7,  1,  6,  0,  7,  1,},

  59.   {   3,  5,  2,  4,  3,  5,  2,  4,},

  60.   {   7,  1,  6,  0,  7,  1,  6,  0,},

  61.   {   2,  4,  3,  5,  2,  4,  3,  5,},

  62.   {   6,  0,  7,  1,  6,  0,  7,  1,},

  63.   {   3,  5,  2,  4,  3,  5,  2,  4,},

  64.   {   7,  1,  6,  0,  7,  1,  6,  0,},

  65. },{

  66.   {   4,  8,  7, 11,  4,  8,  7, 11,},

  67.   {  12,  0, 15,  3, 12,  0, 15,  3,},

  68.   {   6, 10,  5,  9,  6, 10,  5,  9,},

  69.   {  14,  2, 13,  1, 14,  2, 13,  1,},

  70.   {   4,  8,  7, 11,  4,  8,  7, 11,},

  71.   {  12,  0, 15,  3, 12,  0, 15,  3,},

  72.   {   6, 10,  5,  9,  6, 10,  5,  9,},

  73.   {  14,  2, 13,  1, 14,  2, 13,  1,},

  74. },{

  75.   {   9, 17, 15, 23,  8, 16, 14, 22,},

  76.   {  25,  1, 31,  7, 24,  0, 30,  6,},

  77.   {  13, 21, 11, 19, 12, 20, 10, 18,},

  78.   {  29,  5, 27,  3, 28,  4, 26,  2,},

  79.   {   8, 16, 14, 22,  9, 17, 15, 23,},

  80.   {  24,  0, 30,  6, 25,  1, 31,  7,},

  81.   {  12, 20, 10, 18, 13, 21, 11, 19,},

  82.   {  28,  4, 26,  2, 29,  5, 27,  3,},

  83. },{

  84.   {  18, 34, 30, 46, 17, 33, 29, 45,},

  85.   {  50,  2, 62, 14, 49,  1, 61, 13,},

  86.   {  26, 42, 22, 38, 25, 41, 21, 37,},

  87.   {  58, 10, 54,  6, 57,  9, 53,  5,},

  88.   {  16, 32, 28, 44, 19, 35, 31, 47,},

  89.   {  48,  0, 60, 12, 51,  3, 63, 15,},

  90.   {  24, 40, 20, 36, 27, 43, 23, 39,},

  91.   {  56,  8, 52,  4, 59, 11, 55,  7,},

  92. },{

  93.   {  18, 34, 30, 46, 17, 33, 29, 45,},

  94.   {  50,  2, 62, 14, 49,  1, 61, 13,},

  95.   {  26, 42, 22, 38, 25, 41, 21, 37,},

  96.   {  58, 10, 54,  6, 57,  9, 53,  5,},

  97.   {  16, 32, 28, 44, 19, 35, 31, 47,},

  98.   {  48,  0, 60, 12, 51,  3, 63, 15,},

  99.   {  24, 40, 20, 36, 27, 43, 23, 39,},

  100.   {  56,  8, 52,  4, 59, 11, 55,  7,},

  101. },{

  102.   {  36, 68, 60, 92, 34, 66, 58, 90,},

  103.   { 100,  4,124, 28, 98,  2,122, 26,},

  104.   {  52, 84, 44, 76, 50, 82, 42, 74,},

  105.   { 116, 20,108, 12,114, 18,106, 10,},

  106.   {  32, 64, 56, 88, 38, 70, 62, 94,},

  107.   {  96,  0,120, 24,102,  6,126, 30,},

  108.   {  48, 80, 40, 72, 54, 86, 46, 78,},

  109.   { 112, 16,104,  8,118, 22,110, 14,},

  110. }};

  111. 

  112. static const uint16_t dither_scale[15][16]={

  113. {    2,    3,    3,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,},

  114. {    2,    3,    7,    7,   13,   13,   25,   25,   25,   25,   25,   25,   25,   25,   25,   25,},

  115. {    3,    3,    4,   15,   15,   29,   57,   57,   57,  113,  113,  113,  113,  113,  113,  113,},

  116. {    3,    4,    4,    5,   31,   31,   61,  121,  241,  241,  241,  241,  481,  481,  481,  481,},

  117. {    3,    4,    5,    5,    6,   63,   63,  125,  249,  497,  993,  993,  993,  993,  993, 1985,},

  118. {    3,    5,    6,    6,    6,    7,  127,  127,  253,  505, 1009, 2017, 4033, 4033, 4033, 4033,},

  119. {    3,    5,    6,    7,    7,    7,    8,  255,  255,  509, 1017, 2033, 4065, 8129,16257,16257,},

  120. {    3,    5,    6,    8,    8,    8,    8,    9,  511,  511, 1021, 2041, 4081, 8161,16321,32641,},

  121. {    3,    5,    7,    8,    9,    9,    9,    9,   10, 1023, 1023, 2045, 4089, 8177,16353,32705,},

  122. {    3,    5,    7,    8,   10,   10,   10,   10,   10,   11, 2047, 2047, 4093, 8185,16369,32737,},

  123. {    3,    5,    7,    8,   10,   11,   11,   11,   11,   11,   12, 4095, 4095, 8189,16377,32753,},

  124. {    3,    5,    7,    9,   10,   12,   12,   12,   12,   12,   12,   13, 8191, 8191,16381,32761,},

  125. {    3,    5,    7,    9,   10,   12,   13,   13,   13,   13,   13,   13,   14,16383,16383,32765,},

  126. {    3,    5,    7,    9,   10,   12,   14,   14,   14,   14,   14,   14,   14,   15,32767,32767,},

  127. {    3,    5,    7,    9,   11,   12,   14,   15,   15,   15,   15,   15,   15,   15,   16,65535,},

  128. };

  129. 

  130. 

  131. static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,

  132.                       uint8_t val)

  133. {

  134.     int i;

  135.     uint8_t *ptr = plane + stride * y;

  136.     for (i = 0; i < height; i++) {

  137.         memset(ptr, val, width);

  138.         ptr += stride;

  139.     }

  140. }

  141. 

  142. static void copyPlane(const uint8_t *src, int srcStride,

  143.                       int srcSliceY, int srcSliceH, int width,

  144.                       uint8_t *dst, int dstStride)

  145. {

  146.     dst += dstStride * srcSliceY;

  147.     if (dstStride == srcStride && srcStride > 0) {

  148.         memcpy(dst, src, srcSliceH * dstStride);

  149.     } else {

  150.         int i;

  151.         for (i = 0; i < srcSliceH; i++) {

  152.             memcpy(dst, src, width);

  153.             src += srcStride;

  154.             dst += dstStride;

  155.         }

  156.     }

  157. }

  158. 

  159. static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],

  160.                                int srcStride[], int srcSliceY,

  161.                                int srcSliceH, uint8_t *dstParam[],

  162.                                int dstStride[])

  163. {

  164.     uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;

  165. 

  166.     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,

  167.               dstParam[0], dstStride[0]);

  168. 

  169.     if (c->dstFormat == AV_PIX_FMT_NV12)

  170.         interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,

  171.                         srcStride[1], srcStride[2], dstStride[1]);

  172.     else

  173.         interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,

  174.                         srcStride[2], srcStride[1], dstStride[1]);

  175. 

  176.     return srcSliceH;

  177. }

  178. 

  179. static int nv12ToPlanarWrapper(SwsContext *c, const uint8_t *src[],

  180.                                int srcStride[], int srcSliceY,

  181.                                int srcSliceH, uint8_t *dstParam[],

  182.                                int dstStride[])

  183. {

  184.     uint8_t *dst1 = dstParam[1] + dstStride[1] * srcSliceY / 2;

  185.     uint8_t *dst2 = dstParam[2] + dstStride[2] * srcSliceY / 2;

  186. 

  187.     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,

  188.               dstParam[0], dstStride[0]);

  189. 

  190.     if (c->srcFormat == AV_PIX_FMT_NV12)

  191.         deinterleaveBytes(src[1], dst1, dst2,c->srcW / 2, srcSliceH / 2,

  192.                           srcStride[1], dstStride[1], dstStride[2]);

  193.     else

  194.         deinterleaveBytes(src[1], dst2, dst1, c->srcW / 2, srcSliceH / 2,

  195.                           srcStride[1], dstStride[2], dstStride[1]);

  196. 

  197.     return srcSliceH;

  198. }

  199. 

  200. static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],

  201.                                int srcStride[], int srcSliceY, int srcSliceH,

  202.                                uint8_t *dstParam[], int dstStride[])

  203. {

  204.     uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;

  205. 

  206.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],

  207.                srcStride[1], dstStride[0]);

  208. 

  209.     return srcSliceH;

  210. }

  211. 

  212. static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],

  213.                                int srcStride[], int srcSliceY, int srcSliceH,

  214.                                uint8_t *dstParam[], int dstStride[])

  215. {

  216.     uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;

  217. 

  218.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],

  219.                srcStride[1], dstStride[0]);

  220. 

  221.     return srcSliceH;

  222. }

  223. 

  224. static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],

  225.                                 int srcStride[], int srcSliceY, int srcSliceH,

  226.                                 uint8_t *dstParam[], int dstStride[])

  227. {

  228.     uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;

  229. 

  230.     yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],

  231.                   srcStride[1], dstStride[0]);

  232. 

  233.     return srcSliceH;

  234. }

  235. 

  236. static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],

  237.                                 int srcStride[], int srcSliceY, int srcSliceH,

  238.                                 uint8_t *dstParam[], int dstStride[])

  239. {

  240.     uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;

  241. 

  242.     yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],

  243.                   srcStride[1], dstStride[0]);

  244. 

  245.     return srcSliceH;

  246. }

  247. 

  248. static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],

  249.                                int srcStride[], int srcSliceY, int srcSliceH,

  250.                                uint8_t *dstParam[], int dstStride[])

  251. {

  252.     uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;

  253.     uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;

  254.     uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;

  255. 

  256.     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],

  257.                  dstStride[1], srcStride[0]);

  258. 

  259.     if (dstParam[3])

  260.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  261. 

  262.     return srcSliceH;

  263. }

  264. 

  265. static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],

  266.                                int srcStride[], int srcSliceY, int srcSliceH,

  267.                                uint8_t *dstParam[], int dstStride[])

  268. {

  269.     uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;

  270.     uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;

  271.     uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;

  272. 

  273.     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],

  274.                  dstStride[1], srcStride[0]);

  275. 

  276.     return srcSliceH;

  277. }

  278. 

  279. static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],

  280.                                int srcStride[], int srcSliceY, int srcSliceH,

  281.                                uint8_t *dstParam[], int dstStride[])

  282. {

  283.     uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;

  284.     uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;

  285.     uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;

  286. 

  287.     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],

  288.                  dstStride[1], srcStride[0]);

  289. 

  290.     if (dstParam[3])

  291.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  292. 

  293.     return srcSliceH;

  294. }

  295. 

  296. static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],

  297.                                int srcStride[], int srcSliceY, int srcSliceH,

  298.                                uint8_t *dstParam[], int dstStride[])

  299. {

  300.     uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;

  301.     uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;

  302.     uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;

  303. 

  304.     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],

  305.                  dstStride[1], srcStride[0]);

  306. 

  307.     return srcSliceH;

  308. }

  309. 

  310. static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,

  311.                              const uint8_t *palette)

  312. {

  313.     int i;

  314.     for (i = 0; i < num_pixels; i++)

  315.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);

  316. }

  317. 

  318. static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,

  319.                                const uint8_t *palette)

  320. {

  321.     int i;

  322. 

  323.     for (i = 0; i < num_pixels; i++)

  324.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];

  325. }

  326. 

  327. static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,

  328.                              const uint8_t *palette)

  329. {

  330.     int i;

  331. 

  332.     for (i = 0; i < num_pixels; i++) {

  333.         //FIXME slow?

  334.         dst[0] = palette[src[i << 1] * 4 + 0];

  335.         dst[1] = palette[src[i << 1] * 4 + 1];

  336.         dst[2] = palette[src[i << 1] * 4 + 2];

  337.         dst += 3;

  338.     }

  339. }

  340. 

  341. static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],

  342.                               int srcStride[], int srcSliceY, int srcSliceH,

  343.                               uint8_t *dst[], int dstStride[])

  344. {

  345.     int i, j, p;

  346. 

  347.     for (p = 0; p < 4; p++) {

  348.         int srcstr = srcStride[p] / 2;

  349.         int dststr = dstStride[p] / 2;

  350.         uint16_t       *dstPtr =       (uint16_t *) dst[p];

  351.         const uint16_t *srcPtr = (const uint16_t *) src[p];

  352.         int min_stride         = FFMIN(FFABS(srcstr), FFABS(dststr));

  353.         if(!dstPtr || !srcPtr)

  354.             continue;

  355.         for (i = 0; i < (srcSliceH >> c->chrDstVSubSample); i++) {

  356.             for (j = 0; j < min_stride; j++) {

  357.                 dstPtr[j] = av_bswap16(srcPtr[j]);

  358.             }

  359.             srcPtr += srcstr;

  360.             dstPtr += dststr;

  361.         }

  362.     }

  363. 

  364.     return srcSliceH;

  365. }

  366. 

  367. static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],

  368.                            int srcSliceY, int srcSliceH, uint8_t *dst[],

  369.                            int dstStride[])

  370. {

  371.     const enum AVPixelFormat srcFormat = c->srcFormat;

  372.     const enum AVPixelFormat dstFormat = c->dstFormat;

  373.     void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,

  374.                  const uint8_t *palette) = NULL;

  375.     int i;

  376.     uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;

  377.     const uint8_t *srcPtr = src[0];

  378. 

  379.     if (srcFormat == AV_PIX_FMT_GRAY8A) {

  380.         switch (dstFormat) {

  381.         case AV_PIX_FMT_RGB32  : conv = gray8aToPacked32; break;

  382.         case AV_PIX_FMT_BGR32  : conv = gray8aToPacked32; break;

  383.         case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;

  384.         case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;

  385.         case AV_PIX_FMT_RGB24  : conv = gray8aToPacked24; break;

  386.         case AV_PIX_FMT_BGR24  : conv = gray8aToPacked24; break;

  387.         }

  388.     } else if (usePal(srcFormat)) {

  389.         switch (dstFormat) {

  390.         case AV_PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;

  391.         case AV_PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;

  392.         case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;

  393.         case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;

  394.         case AV_PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;

  395.         case AV_PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;

  396.         }

  397.     }

  398. 

  399.     if (!conv)

  400.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  401.                av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));

  402.     else {

  403.         for (i = 0; i < srcSliceH; i++) {

  404.             conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);

  405.             srcPtr += srcStride[0];

  406.             dstPtr += dstStride[0];

  407.         }

  408.     }

  409. 

  410.     return srcSliceH;

  411. }

  412. 

  413. static void gbr16ptopacked16(const uint16_t *src[], int srcStride[],

  414.                              uint8_t *dst, int dstStride, int srcSliceH,

  415.                              int alpha, int swap, int bpp, int width)

  416. {

  417.     int x, h, i;

  418.     int src_alpha = src[3] != NULL;

  419.     int scale_high = 16 - bpp, scale_low = (bpp - 8) * 2;

  420.     for (h = 0; h < srcSliceH; h++) {

  421.         uint16_t *dest = (uint16_t *)(dst + dstStride * h);

  422.         uint16_t component;

  423. 

  424.         switch(swap) {

  425.         case 3:

  426.             if (alpha && !src_alpha) {

  427.                 for (x = 0; x < width; x++) {

  428.                     component = av_bswap16(src[0][x]);

  429.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  430.                     component = av_bswap16(src[1][x]);

  431.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  432.                     component = av_bswap16(src[2][x]);

  433.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  434.                     *dest++ = 0xffff;

  435.                 }

  436.             } else if (alpha && src_alpha) {

  437.                 for (x = 0; x < width; x++) {

  438.                     component = av_bswap16(src[0][x]);

  439.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  440.                     component = av_bswap16(src[1][x]);

  441.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  442.                     component = av_bswap16(src[2][x]);

  443.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  444.                     component = av_bswap16(src[3][x]);

  445.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  446.                 }

  447.             } else {

  448.                 for (x = 0; x < width; x++) {

  449.                     component = av_bswap16(src[0][x]);

  450.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  451.                     component = av_bswap16(src[1][x]);

  452.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  453.                     component = av_bswap16(src[2][x]);

  454.                     *dest++ = av_bswap16(component << scale_high | component >> scale_low);

  455.                 }

  456.             }

  457.             break;

  458.         case 2:

  459.             if (alpha && !src_alpha) {

  460.                 for (x = 0; x < width; x++) {

  461.                     *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);

  462.                     *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);

  463.                     *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);

  464.                     *dest++ = 0xffff;

  465.                 }

  466.             } else if (alpha && src_alpha) {

  467.                 for (x = 0; x < width; x++) {

  468.                     *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);

  469.                     *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);

  470.                     *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);

  471.                     *dest++ = av_bswap16(src[3][x] << scale_high | src[3][x] >> scale_low);

  472.                 }

  473.             } else {

  474.                 for (x = 0; x < width; x++) {

  475.                     *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);

  476.                     *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);

  477.                     *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);

  478.                 }

  479.             }

  480.             break;

  481.         case 1:

  482.             if (alpha && !src_alpha) {

  483.                 for (x = 0; x < width; x++) {

  484.                     *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;

  485.                     *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;

  486.                     *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;

  487.                     *dest++ = 0xffff;

  488.                 }

  489.             } else if (alpha && src_alpha) {

  490.                 for (x = 0; x < width; x++) {

  491.                     *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;

  492.                     *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;

  493.                     *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;

  494.                     *dest++ = av_bswap16(src[3][x]) << scale_high | av_bswap16(src[3][x]) >> scale_low;

  495.                 }

  496.             } else {

  497.                 for (x = 0; x < width; x++) {

  498.                     *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;

  499.                     *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;

  500.                     *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;

  501.                 }

  502.             }

  503.             break;

  504.         default:

  505.             if (alpha && !src_alpha) {

  506.                 for (x = 0; x < width; x++) {

  507.                     *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;

  508.                     *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;

  509.                     *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;

  510.                     *dest++ = 0xffff;

  511.                 }

  512.             } else if (alpha && src_alpha) {

  513.                 for (x = 0; x < width; x++) {

  514.                     *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;

  515.                     *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;

  516.                     *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;

  517.                     *dest++ = src[3][x] << scale_high | src[3][x] >> scale_low;

  518.                 }

  519.             } else {

  520.                 for (x = 0; x < width; x++) {

  521.                     *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;

  522.                     *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;

  523.                     *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;

  524.                 }

  525.             }

  526.         }

  527.         for (i = 0; i < 3 + src_alpha; i++)

  528.             src[i] += srcStride[i] >> 1;

  529.     }

  530. }

  531. 

  532. static int planarRgb16ToRgb16Wrapper(SwsContext *c, const uint8_t *src[],

  533.                                      int srcStride[], int srcSliceY, int srcSliceH,

  534.                                      uint8_t *dst[], int dstStride[])

  535. {

  536.     const uint16_t *src102[] = { (uint16_t *)src[1], (uint16_t *)src[0], (uint16_t *)src[2], (uint16_t *)src[3] };

  537.     const uint16_t *src201[] = { (uint16_t *)src[2], (uint16_t *)src[0], (uint16_t *)src[1], (uint16_t *)src[3] };

  538.     int stride102[] = { srcStride[1], srcStride[0], srcStride[2], srcStride[3] };

  539.     int stride201[] = { srcStride[2], srcStride[0], srcStride[1], srcStride[3] };

  540.     const AVPixFmtDescriptor *src_format = av_pix_fmt_desc_get(c->srcFormat);

  541.     const AVPixFmtDescriptor *dst_format = av_pix_fmt_desc_get(c->dstFormat);

  542.     int bits_per_sample = src_format->comp[0].depth_minus1 + 1;

  543.     int swap = 0;

  544.     if ( HAVE_BIGENDIAN && !(src_format->flags & AV_PIX_FMT_FLAG_BE) ||

  545.         !HAVE_BIGENDIAN &&   src_format->flags & AV_PIX_FMT_FLAG_BE)

  546.         swap++;

  547.     if ( HAVE_BIGENDIAN && !(dst_format->flags & AV_PIX_FMT_FLAG_BE) ||

  548.         !HAVE_BIGENDIAN &&   dst_format->flags & AV_PIX_FMT_FLAG_BE)

  549.         swap += 2;

  550. 

  551.     if ((src_format->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) !=

  552.         (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB) ||

  553.         bits_per_sample <= 8) {

  554.         av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",

  555.                src_format->name, dst_format->name);

  556.         return srcSliceH;

  557.     }

  558.     switch (c->dstFormat) {

  559.     case AV_PIX_FMT_BGR48LE:

  560.     case AV_PIX_FMT_BGR48BE:

  561.         gbr16ptopacked16(src102, stride102,

  562.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  563.                          srcSliceH, 0, swap, bits_per_sample, c->srcW);

  564.         break;

  565.     case AV_PIX_FMT_RGB48LE:

  566.     case AV_PIX_FMT_RGB48BE:

  567.         gbr16ptopacked16(src201, stride201,

  568.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  569.                          srcSliceH, 0, swap, bits_per_sample, c->srcW);

  570.         break;

  571.     case AV_PIX_FMT_RGBA64LE:

  572.     case AV_PIX_FMT_RGBA64BE:

  573.          gbr16ptopacked16(src201, stride201,

  574.                           dst[0] + srcSliceY * dstStride[0], dstStride[0],

  575.                           srcSliceH, 1, swap, bits_per_sample, c->srcW);

  576.         break;

  577.     case AV_PIX_FMT_BGRA64LE:

  578.     case AV_PIX_FMT_BGRA64BE:

  579.         gbr16ptopacked16(src102, stride102,

  580.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  581.                          srcSliceH, 1, swap, bits_per_sample, c->srcW);

  582.         break;

  583.     default:

  584.         av_log(c, AV_LOG_ERROR,

  585.                "unsupported planar RGB conversion %s -> %s\n",

  586.                src_format->name, dst_format->name);

  587.     }

  588. 

  589.     return srcSliceH;

  590. }

  591. 

  592. static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],

  593.                              uint8_t *dst, int dstStride, int srcSliceH,

  594.                              int width)

  595. {

  596.     int x, h, i;

  597.     for (h = 0; h < srcSliceH; h++) {

  598.         uint8_t *dest = dst + dstStride * h;

  599.         for (x = 0; x < width; x++) {

  600.             *dest++ = src[0][x];

  601.             *dest++ = src[1][x];

  602.             *dest++ = src[2][x];

  603.         }

  604. 

  605.         for (i = 0; i < 3; i++)

  606.             src[i] += srcStride[i];

  607.     }

  608. }

  609. 

  610. static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],

  611.                              uint8_t *dst, int dstStride, int srcSliceH,

  612.                              int alpha_first, int width)

  613. {

  614.     int x, h, i;

  615.     for (h = 0; h < srcSliceH; h++) {

  616.         uint8_t *dest = dst + dstStride * h;

  617. 

  618.         if (alpha_first) {

  619.             for (x = 0; x < width; x++) {

  620.                 *dest++ = 0xff;

  621.                 *dest++ = src[0][x];

  622.                 *dest++ = src[1][x];

  623.                 *dest++ = src[2][x];

  624.             }

  625.         } else {

  626.             for (x = 0; x < width; x++) {

  627.                 *dest++ = src[0][x];

  628.                 *dest++ = src[1][x];

  629.                 *dest++ = src[2][x];

  630.                 *dest++ = 0xff;

  631.             }

  632.         }

  633. 

  634.         for (i = 0; i < 3; i++)

  635.             src[i] += srcStride[i];

  636.     }

  637. }

  638. 

  639. static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],

  640.                                  int srcStride[], int srcSliceY, int srcSliceH,

  641.                                  uint8_t *dst[], int dstStride[])

  642. {

  643.     int alpha_first = 0;

  644.     const uint8_t *src102[] = { src[1], src[0], src[2] };

  645.     const uint8_t *src201[] = { src[2], src[0], src[1] };

  646.     int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };

  647.     int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };

  648. 

  649.     if (c->srcFormat != AV_PIX_FMT_GBRP) {

  650.         av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",

  651.                av_get_pix_fmt_name(c->srcFormat),

  652.                av_get_pix_fmt_name(c->dstFormat));

  653.         return srcSliceH;

  654.     }

  655. 

  656.     switch (c->dstFormat) {

  657.     case AV_PIX_FMT_BGR24:

  658.         gbr24ptopacked24(src102, stride102,

  659.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  660.                          srcSliceH, c->srcW);

  661.         break;

  662. 

  663.     case AV_PIX_FMT_RGB24:

  664.         gbr24ptopacked24(src201, stride201,

  665.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  666.                          srcSliceH, c->srcW);

  667.         break;

  668. 

  669.     case AV_PIX_FMT_ARGB:

  670.         alpha_first = 1;

  671.     case AV_PIX_FMT_RGBA:

  672.         gbr24ptopacked32(src201, stride201,

  673.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  674.                          srcSliceH, alpha_first, c->srcW);

  675.         break;

  676. 

  677.     case AV_PIX_FMT_ABGR:

  678.         alpha_first = 1;

  679.     case AV_PIX_FMT_BGRA:

  680.         gbr24ptopacked32(src102, stride102,

  681.                          dst[0] + srcSliceY * dstStride[0], dstStride[0],

  682.                          srcSliceH, alpha_first, c->srcW);

  683.         break;

  684. 

  685.     default:

  686.         av_log(c, AV_LOG_ERROR,

  687.                "unsupported planar RGB conversion %s -> %s\n",

  688.                av_get_pix_fmt_name(c->srcFormat),

  689.                av_get_pix_fmt_name(c->dstFormat));

  690.     }

  691. 

  692.     return srcSliceH;

  693. }

  694. 

  695. static int planarRgbToplanarRgbWrapper(SwsContext *c, const uint8_t *src[],

  696.                                        int srcStride[], int srcSliceY, int srcSliceH,

  697.                                        uint8_t *dst[], int dstStride[])

  698. {

  699.     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,

  700.               dst[0], dstStride[0]);

  701.     copyPlane(src[1], srcStride[1], srcSliceY, srcSliceH, c->srcW,

  702.               dst[1], dstStride[1]);

  703.     copyPlane(src[2], srcStride[2], srcSliceY, srcSliceH, c->srcW,

  704.               dst[2], dstStride[2]);

  705.     if (dst[3])

  706.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  707. 

  708.     return srcSliceH;

  709. }

  710. 

  711. static void packedtogbr24p(const uint8_t *src, int srcStride,

  712.                            uint8_t *dst[], int dstStride[], int srcSliceH,

  713.                            int alpha_first, int inc_size, int width)

  714. {

  715.     uint8_t *dest[3];

  716.     int x, h;

  717. 

  718.     dest[0] = dst[0];

  719.     dest[1] = dst[1];

  720.     dest[2] = dst[2];

  721. 

  722.     if (alpha_first)

  723.         src++;

  724. 

  725.     for (h = 0; h < srcSliceH; h++) {

  726.         for (x = 0; x < width; x++) {

  727.             dest[0][x] = src[0];

  728.             dest[1][x] = src[1];

  729.             dest[2][x] = src[2];

  730. 

  731.             src += inc_size;

  732.         }

  733.         src     += srcStride - width * inc_size;

  734.         dest[0] += dstStride[0];

  735.         dest[1] += dstStride[1];

  736.         dest[2] += dstStride[2];

  737.     }

  738. }

  739. 

  740. static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],

  741.                                  int srcStride[], int srcSliceY, int srcSliceH,

  742.                                  uint8_t *dst[], int dstStride[])

  743. {

  744.     int alpha_first = 0;

  745.     int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };

  746.     int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };

  747.     uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],

  748.                           dst[0] + srcSliceY * dstStride[0],

  749.                           dst[2] + srcSliceY * dstStride[2] };

  750.     uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],

  751.                           dst[0] + srcSliceY * dstStride[0],

  752.                           dst[1] + srcSliceY * dstStride[1] };

  753. 

  754.     switch (c->srcFormat) {

  755.     case AV_PIX_FMT_RGB24:

  756.         packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,

  757.                        stride201, srcSliceH, alpha_first, 3, c->srcW);

  758.         break;

  759.     case AV_PIX_FMT_BGR24:

  760.         packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,

  761.                        stride102, srcSliceH, alpha_first, 3, c->srcW);

  762.         break;

  763.     case AV_PIX_FMT_ARGB:

  764.         alpha_first = 1;

  765.     case AV_PIX_FMT_RGBA:

  766.         packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,

  767.                        stride201, srcSliceH, alpha_first, 4, c->srcW);

  768.         break;

  769.     case AV_PIX_FMT_ABGR:

  770.         alpha_first = 1;

  771.     case AV_PIX_FMT_BGRA:

  772.         packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,

  773.                        stride102, srcSliceH, alpha_first, 4, c->srcW);

  774.         break;

  775.     default:

  776.         av_log(c, AV_LOG_ERROR,

  777.                "unsupported planar RGB conversion %s -> %s\n",

  778.                av_get_pix_fmt_name(c->srcFormat),

  779.                av_get_pix_fmt_name(c->dstFormat));

  780.     }

  781. 

  782.     return srcSliceH;

  783. }

  784. 

  785. #define isRGBA32(x) (            \

  786.            (x) == AV_PIX_FMT_ARGB   \

  787.         || (x) == AV_PIX_FMT_RGBA   \

  788.         || (x) == AV_PIX_FMT_BGRA   \

  789.         || (x) == AV_PIX_FMT_ABGR   \

  790.         )

  791. 

  792. #define isRGBA64(x) (                \

  793.            (x) == AV_PIX_FMT_RGBA64LE   \

  794.         || (x) == AV_PIX_FMT_RGBA64BE   \

  795.         || (x) == AV_PIX_FMT_BGRA64LE   \

  796.         || (x) == AV_PIX_FMT_BGRA64BE   \

  797.         )

  798. 

  799. #define isRGB48(x) (                \

  800.            (x) == AV_PIX_FMT_RGB48LE   \

  801.         || (x) == AV_PIX_FMT_RGB48BE   \

  802.         || (x) == AV_PIX_FMT_BGR48LE   \

  803.         || (x) == AV_PIX_FMT_BGR48BE   \

  804.         )

  805. 

  806. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  807. typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);

  808. static rgbConvFn findRgbConvFn(SwsContext *c)

  809. {

  810.     const enum AVPixelFormat srcFormat = c->srcFormat;

  811.     const enum AVPixelFormat dstFormat = c->dstFormat;

  812.     const int srcId = c->srcFormatBpp;

  813.     const int dstId = c->dstFormatBpp;

  814.     rgbConvFn conv = NULL;

  815. 

  816. #define IS_NOT_NE(bpp, desc) \

  817.     (((bpp + 7) >> 3) == 2 && \

  818.      (!(desc->flags & AV_PIX_FMT_FLAG_BE) != !HAVE_BIGENDIAN))

  819. 

  820. #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)

  821. 

  822.     if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {

  823.         if (     CONV_IS(ABGR, RGBA)

  824.               || CONV_IS(ARGB, BGRA)

  825.               || CONV_IS(BGRA, ARGB)

  826.               || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;

  827.         else if (CONV_IS(ABGR, ARGB)

  828.               || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;

  829.         else if (CONV_IS(ABGR, BGRA)

  830.               || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;

  831.         else if (CONV_IS(BGRA, RGBA)

  832.               || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;

  833.         else if (CONV_IS(BGRA, ABGR)

  834.               || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;

  835.     } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {

  836.         if      (CONV_IS(RGB48LE, BGR48LE)

  837.               || CONV_IS(BGR48LE, RGB48LE)

  838.               || CONV_IS(RGB48BE, BGR48BE)

  839.               || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;

  840.         else if (CONV_IS(RGB48LE, BGR48BE)

  841.               || CONV_IS(BGR48LE, RGB48BE)

  842.               || CONV_IS(RGB48BE, BGR48LE)

  843.               || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;

  844.     } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {

  845.         if      (CONV_IS(RGBA64LE, BGR48LE)

  846.               || CONV_IS(BGRA64LE, RGB48LE)

  847.               || CONV_IS(RGBA64BE, BGR48BE)

  848.               || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;

  849.         else if (CONV_IS(RGBA64LE, BGR48BE)

  850.               || CONV_IS(BGRA64LE, RGB48BE)

  851.               || CONV_IS(RGBA64BE, BGR48LE)

  852.               || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;

  853.         else if (CONV_IS(RGBA64LE, RGB48LE)

  854.               || CONV_IS(BGRA64LE, BGR48LE)

  855.               || CONV_IS(RGBA64BE, RGB48BE)

  856.               || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;

  857.         else if (CONV_IS(RGBA64LE, RGB48BE)

  858.               || CONV_IS(BGRA64LE, BGR48BE)

  859.               || CONV_IS(RGBA64BE, RGB48LE)

  860.               || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;

  861.     } else

  862.     /* BGR -> BGR */

  863.     if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||

  864.         (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {

  865.         switch (srcId | (dstId << 16)) {

  866.         case 0x000F000C: conv = rgb12to15; break;

  867.         case 0x000F0010: conv = rgb16to15; break;

  868.         case 0x000F0018: conv = rgb24to15; break;

  869.         case 0x000F0020: conv = rgb32to15; break;

  870.         case 0x0010000F: conv = rgb15to16; break;

  871.         case 0x00100018: conv = rgb24to16; break;

  872.         case 0x00100020: conv = rgb32to16; break;

  873.         case 0x0018000F: conv = rgb15to24; break;

  874.         case 0x00180010: conv = rgb16to24; break;

  875.         case 0x00180020: conv = rgb32to24; break;

  876.         case 0x0020000F: conv = rgb15to32; break;

  877.         case 0x00200010: conv = rgb16to32; break;

  878.         case 0x00200018: conv = rgb24to32; break;

  879.         }

  880.     } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||

  881.                (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {

  882.         switch (srcId | (dstId << 16)) {

  883.         case 0x000C000C: conv = rgb12tobgr12; break;

  884.         case 0x000F000F: conv = rgb15tobgr15; break;

  885.         case 0x000F0010: conv = rgb16tobgr15; break;

  886.         case 0x000F0018: conv = rgb24tobgr15; break;

  887.         case 0x000F0020: conv = rgb32tobgr15; break;

  888.         case 0x0010000F: conv = rgb15tobgr16; break;

  889.         case 0x00100010: conv = rgb16tobgr16; break;

  890.         case 0x00100018: conv = rgb24tobgr16; break;

  891.         case 0x00100020: conv = rgb32tobgr16; break;

  892.         case 0x0018000F: conv = rgb15tobgr24; break;

  893.         case 0x00180010: conv = rgb16tobgr24; break;

  894.         case 0x00180018: conv = rgb24tobgr24; break;

  895.         case 0x00180020: conv = rgb32tobgr24; break;

  896.         case 0x0020000F: conv = rgb15tobgr32; break;

  897.         case 0x00200010: conv = rgb16tobgr32; break;

  898.         case 0x00200018: conv = rgb24tobgr32; break;

  899.         }

  900.     }

  901. 

  902.     if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)

  903.         return NULL;

  904. 

  905.     return conv;

  906. }

  907. 

  908. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  909. static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],

  910.                            int srcSliceY, int srcSliceH, uint8_t *dst[],

  911.                            int dstStride[])

  912. 

  913. {

  914.     const enum AVPixelFormat srcFormat = c->srcFormat;

  915.     const enum AVPixelFormat dstFormat = c->dstFormat;

  916.     const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);

  917.     const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);

  918.     const int srcBpp = (c->srcFormatBpp + 7) >> 3;

  919.     const int dstBpp = (c->dstFormatBpp + 7) >> 3;

  920.     rgbConvFn conv = findRgbConvFn(c);

  921. 

  922.     if (!conv) {

  923.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  924.                av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));

  925.     } else {

  926.         const uint8_t *srcPtr = src[0];

  927.               uint8_t *dstPtr = dst[0];

  928.         int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);

  929.         int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);

  930. 

  931.         if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&

  932.             !isRGBA32(dstFormat))

  933.             srcPtr += ALT32_CORR;

  934. 

  935.         if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&

  936.             !isRGBA32(srcFormat)) {

  937.             int i;

  938.             av_assert0(ALT32_CORR == 1);

  939.             for (i = 0; i < srcSliceH; i++)

  940.                 dstPtr[dstStride[0] * (srcSliceY + i)] = 255;

  941.             dstPtr += ALT32_CORR;

  942.         }

  943. 

  944.         if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&

  945.             !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)

  946.             conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,

  947.                  srcSliceH * srcStride[0]);

  948.         else {

  949.             int i, j;

  950.             dstPtr += dstStride[0] * srcSliceY;

  951. 

  952.             for (i = 0; i < srcSliceH; i++) {

  953.                 if(src_bswap) {

  954.                     for(j=0; j<c->srcW; j++)

  955.                         ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);

  956.                     conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);

  957.                 }else

  958.                     conv(srcPtr, dstPtr, c->srcW * srcBpp);

  959.                 if(dst_bswap)

  960.                     for(j=0; j<c->srcW; j++)

  961.                         ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);

  962.                 srcPtr += srcStride[0];

  963.                 dstPtr += dstStride[0];

  964.             }

  965.         }

  966.     }

  967.     return srcSliceH;

  968. }

  969. 

  970. static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],

  971.                               int srcStride[], int srcSliceY, int srcSliceH,

  972.                               uint8_t *dst[], int dstStride[])

  973. {

  974.     ff_rgb24toyv12(

  975.         src[0],

  976.         dst[0] +  srcSliceY       * dstStride[0],

  977.         dst[1] + (srcSliceY >> 1) * dstStride[1],

  978.         dst[2] + (srcSliceY >> 1) * dstStride[2],

  979.         c->srcW, srcSliceH,

  980.         dstStride[0], dstStride[1], srcStride[0],

  981.         c->input_rgb2yuv_table);

  982.     if (dst[3])

  983.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  984.     return srcSliceH;

  985. }

  986. 

  987. static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],

  988.                              int srcStride[], int srcSliceY, int srcSliceH,

  989.                              uint8_t *dst[], int dstStride[])

  990. {

  991.     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,

  992.               dst[0], dstStride[0]);

  993. 

  994.     planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,

  995.              srcSliceH >> 2, srcStride[1], dstStride[1]);

  996.     planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,

  997.              srcSliceH >> 2, srcStride[2], dstStride[2]);

  998.     if (dst[3])

  999.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1000.     return srcSliceH;

  1001. }

  1002. 

  1003. /* unscaled copy like stuff (assumes nearly identical formats) */

  1004. static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],

  1005.                              int srcStride[], int srcSliceY, int srcSliceH,

  1006.                              uint8_t *dst[], int dstStride[])

  1007. {

  1008.     if (dstStride[0] == srcStride[0] && srcStride[0] > 0)

  1009.         memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);

  1010.     else {

  1011.         int i;

  1012.         const uint8_t *srcPtr = src[0];

  1013.         uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;

  1014.         int length = 0;

  1015. 

  1016.         /* universal length finder */

  1017.         while (length + c->srcW <= FFABS(dstStride[0]) &&

  1018.                length + c->srcW <= FFABS(srcStride[0]))

  1019.             length += c->srcW;

  1020.         av_assert1(length != 0);

  1021. 

  1022.         for (i = 0; i < srcSliceH; i++) {

  1023.             memcpy(dstPtr, srcPtr, length);

  1024.             srcPtr += srcStride[0];

  1025.             dstPtr += dstStride[0];

  1026.         }

  1027.     }

  1028.     return srcSliceH;

  1029. }

  1030. 

  1031. #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\

  1032.     uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\

  1033.     int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\

  1034.     for (i = 0; i < height; i++) {\

  1035.         const uint8_t *dither= dithers[src_depth-9][i&7];\

  1036.         for (j = 0; j < length-7; j+=8){\

  1037.             dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\

  1038.             dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\

  1039.             dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\

  1040.             dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\

  1041.             dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\

  1042.             dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\

  1043.             dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\

  1044.             dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\

  1045.         }\

  1046.         for (; j < length; j++)\

  1047.             dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\

  1048.         dst += dstStride;\

  1049.         src += srcStride;\

  1050.     }

  1051. 

  1052. static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],

  1053.                              int srcStride[], int srcSliceY, int srcSliceH,

  1054.                              uint8_t *dst[], int dstStride[])

  1055. {

  1056.     const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);

  1057.     const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);

  1058.     int plane, i, j;

  1059.     for (plane = 0; plane < 4; plane++) {

  1060.         int length = (plane == 0 || plane == 3) ? c->srcW  : FF_CEIL_RSHIFT(c->srcW,   c->chrDstHSubSample);

  1061.         int y =      (plane == 0 || plane == 3) ? srcSliceY: FF_CEIL_RSHIFT(srcSliceY, c->chrDstVSubSample);

  1062.         int height = (plane == 0 || plane == 3) ? srcSliceH: FF_CEIL_RSHIFT(srcSliceH, c->chrDstVSubSample);

  1063.         const uint8_t *srcPtr = src[plane];

  1064.         uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;

  1065.         int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);

  1066. 

  1067.         if (!dst[plane])

  1068.             continue;

  1069.         // ignore palette for GRAY8

  1070.         if (plane == 1 && !dst[2]) continue;

  1071.         if (!src[plane] || (plane == 1 && !src[2])) {

  1072.             if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {

  1073.                 fillPlane16(dst[plane], dstStride[plane], length, height, y,

  1074.                         plane == 3, desc_dst->comp[plane].depth_minus1,

  1075.                         isBE(c->dstFormat));

  1076.             } else {

  1077.                 fillPlane(dst[plane], dstStride[plane], length, height, y,

  1078.                         (plane == 3) ? 255 : 128);

  1079.             }

  1080.         } else {

  1081.             if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)

  1082.                || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))

  1083.             ) {

  1084.                 const int src_depth = desc_src->comp[plane].depth_minus1 + 1;

  1085.                 const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;

  1086.                 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;

  1087.                 uint16_t *dstPtr2 = (uint16_t*)dstPtr;

  1088. 

  1089.                 if (dst_depth == 8) {

  1090.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1091.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )

  1092.                     } else {

  1093.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )

  1094.                     }

  1095.                 } else if (src_depth == 8) {

  1096.                     for (i = 0; i < height; i++) {

  1097.                         #define COPY816(w)\

  1098.                         if(shiftonly){\

  1099.                             for (j = 0; j < length; j++)\

  1100.                                 w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\

  1101.                         }else{\

  1102.                             for (j = 0; j < length; j++)\

  1103.                                 w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\

  1104.                                                (srcPtr[j]>>(2*8-dst_depth)));\

  1105.                         }

  1106.                         if(isBE(c->dstFormat)){

  1107.                             COPY816(AV_WB16)

  1108.                         } else {

  1109.                             COPY816(AV_WL16)

  1110.                         }

  1111.                         dstPtr2 += dstStride[plane]/2;

  1112.                         srcPtr  += srcStride[plane];

  1113.                     }

  1114.                 } else if (src_depth <= dst_depth) {

  1115.                     for (i = 0; i < height; i++) {

  1116.                         j = 0;

  1117.                         if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&

  1118.                            isBE(c->dstFormat) == HAVE_BIGENDIAN &&

  1119.                            shiftonly) {

  1120.                              unsigned shift = dst_depth - src_depth;

  1121. #if HAVE_FAST_64BIT

  1122. #define FAST_COPY_UP(shift) \

  1123.     for (; j < length - 3; j += 4) { \

  1124.         uint64_t v = AV_RN64A(srcPtr2 + j); \

  1125.         AV_WN64A(dstPtr2 + j, v << shift); \

  1126.     }

  1127. #else

  1128. #define FAST_COPY_UP(shift) \

  1129.     for (; j < length - 1; j += 2) { \

  1130.         uint32_t v = AV_RN32A(srcPtr2 + j); \

  1131.         AV_WN32A(dstPtr2 + j, v << shift); \

  1132.     }

  1133. #endif

  1134.                              switch (shift)

  1135.                              {

  1136.                              case 6: FAST_COPY_UP(6); break;

  1137.                              case 7: FAST_COPY_UP(7); break;

  1138.                              }

  1139.                         }

  1140. #define COPY_UP(r,w) \

  1141.     if(shiftonly){\

  1142.         for (; j < length; j++){ \

  1143.             unsigned int v= r(&srcPtr2[j]);\

  1144.             w(&dstPtr2[j], v<<(dst_depth-src_depth));\

  1145.         }\

  1146.     }else{\

  1147.         for (; j < length; j++){ \

  1148.             unsigned int v= r(&srcPtr2[j]);\

  1149.             w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \

  1150.                         (v>>(2*src_depth-dst_depth)));\

  1151.         }\

  1152.     }

  1153.                         if(isBE(c->srcFormat)){

  1154.                             if(isBE(c->dstFormat)){

  1155.                                 COPY_UP(AV_RB16, AV_WB16)

  1156.                             } else {

  1157.                                 COPY_UP(AV_RB16, AV_WL16)

  1158.                             }

  1159.                         } else {

  1160.                             if(isBE(c->dstFormat)){

  1161.                                 COPY_UP(AV_RL16, AV_WB16)

  1162.                             } else {

  1163.                                 COPY_UP(AV_RL16, AV_WL16)

  1164.                             }

  1165.                         }

  1166.                         dstPtr2 += dstStride[plane]/2;

  1167.                         srcPtr2 += srcStride[plane]/2;

  1168.                     }

  1169.                 } else {

  1170.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1171.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1172.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )

  1173.                         } else {

  1174.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)

  1175.                         }

  1176.                     }else{

  1177.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1178.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )

  1179.                         } else {

  1180.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)

  1181.                         }

  1182.                     }

  1183.                 }

  1184.             } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&

  1185.                       isBE(c->srcFormat) != isBE(c->dstFormat)) {

  1186. 

  1187.                 for (i = 0; i < height; i++) {

  1188.                     for (j = 0; j < length; j++)

  1189.                         ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);

  1190.                     srcPtr += srcStride[plane];

  1191.                     dstPtr += dstStride[plane];

  1192.                 }

  1193.             } else if (dstStride[plane] == srcStride[plane] &&

  1194.                        srcStride[plane] > 0 && srcStride[plane] == length) {

  1195.                 memcpy(dst[plane] + dstStride[plane] * y, src[plane],

  1196.                        height * dstStride[plane]);

  1197.             } else {

  1198.                 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  1199.                     length *= 2;

  1200.                 else if (!desc_src->comp[0].depth_minus1)

  1201.                     length >>= 3; // monowhite/black

  1202.                 for (i = 0; i < height; i++) {

  1203.                     memcpy(dstPtr, srcPtr, length);

  1204.                     srcPtr += srcStride[plane];

  1205.                     dstPtr += dstStride[plane];

  1206.                 }

  1207.             }

  1208.         }

  1209.     }

  1210.     return srcSliceH;

  1211. }

  1212. 

  1213. 

  1214. #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt)          \

  1215.     ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) ||     \

  1216.      (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))

  1217. 

  1218. 

  1219. void ff_get_unscaled_swscale(SwsContext *c)

  1220. {

  1221.     const enum AVPixelFormat srcFormat = c->srcFormat;

  1222.     const enum AVPixelFormat dstFormat = c->dstFormat;

  1223.     const int flags = c->flags;

  1224.     const int dstH = c->dstH;

  1225.     int needsDither;

  1226. 

  1227.     needsDither = isAnyRGB(dstFormat) &&

  1228.             c->dstFormatBpp < 24 &&

  1229.            (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));

  1230. 

  1231.     /* yv12_to_nv12 */

  1232.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&

  1233.         (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {

  1234.         c->swscale = planarToNv12Wrapper;

  1235.     }

  1236.     /* nv12_to_yv12 */

  1237.     if (dstFormat == AV_PIX_FMT_YUV420P &&

  1238.         (srcFormat == AV_PIX_FMT_NV12 || srcFormat == AV_PIX_FMT_NV21)) {

  1239.         c->swscale = nv12ToPlanarWrapper;

  1240.     }

  1241.     /* yuv2bgr */

  1242.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||

  1243.          srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&

  1244.         !(flags & SWS_ACCURATE_RND) && (c->dither == SWS_DITHER_BAYER || c->dither == SWS_DITHER_AUTO) && !(dstH & 1)) {

  1245.         c->swscale = ff_yuv2rgb_get_func_ptr(c);

  1246.     }

  1247. 

  1248.     if (srcFormat == AV_PIX_FMT_YUV410P &&

  1249.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1250.         !(flags & SWS_BITEXACT)) {

  1251.         c->swscale = yvu9ToYv12Wrapper;

  1252.     }

  1253. 

  1254.     /* bgr24toYV12 */

  1255.     if (srcFormat == AV_PIX_FMT_BGR24 &&

  1256.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1257.         !(flags & SWS_ACCURATE_RND))

  1258.         c->swscale = bgr24ToYv12Wrapper;

  1259. 

  1260.     /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  1261.     if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)

  1262.         && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  1263.         c->swscale = rgbToRgbWrapper;

  1264. 

  1265.     if ((srcFormat == AV_PIX_FMT_GBRP && dstFormat == AV_PIX_FMT_GBRAP) ||

  1266.         (srcFormat == AV_PIX_FMT_GBRAP && dstFormat == AV_PIX_FMT_GBRP))

  1267.         c->swscale = planarRgbToplanarRgbWrapper;

  1268. 

  1269. #define isByteRGB(f) (             \

  1270.         f == AV_PIX_FMT_RGB32   || \

  1271.         f == AV_PIX_FMT_RGB32_1 || \

  1272.         f == AV_PIX_FMT_RGB24   || \

  1273.         f == AV_PIX_FMT_BGR32   || \

  1274.         f == AV_PIX_FMT_BGR32_1 || \

  1275.         f == AV_PIX_FMT_BGR24)

  1276. 

  1277.     if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))

  1278.         c->swscale = planarRgbToRgbWrapper;

  1279. 

  1280.     if ((srcFormat == AV_PIX_FMT_GBRP9LE  || srcFormat == AV_PIX_FMT_GBRP9BE  ||

  1281.          srcFormat == AV_PIX_FMT_GBRP16LE || srcFormat == AV_PIX_FMT_GBRP16BE ||

  1282.          srcFormat == AV_PIX_FMT_GBRP10LE || srcFormat == AV_PIX_FMT_GBRP10BE ||

  1283.          srcFormat == AV_PIX_FMT_GBRP12LE || srcFormat == AV_PIX_FMT_GBRP12BE ||

  1284.          srcFormat == AV_PIX_FMT_GBRP14LE || srcFormat == AV_PIX_FMT_GBRP14BE ||

  1285.          srcFormat == AV_PIX_FMT_GBRAP16LE || srcFormat == AV_PIX_FMT_GBRAP16BE) &&

  1286.         (dstFormat == AV_PIX_FMT_RGB48LE  || dstFormat == AV_PIX_FMT_RGB48BE  ||

  1287.          dstFormat == AV_PIX_FMT_BGR48LE  || dstFormat == AV_PIX_FMT_BGR48BE  ||

  1288.          dstFormat == AV_PIX_FMT_RGBA64LE || dstFormat == AV_PIX_FMT_RGBA64BE ||

  1289.          dstFormat == AV_PIX_FMT_BGRA64LE || dstFormat == AV_PIX_FMT_BGRA64BE))

  1290.         c->swscale = planarRgb16ToRgb16Wrapper;

  1291. 

  1292.     if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&

  1293.         isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)

  1294.         c->swscale = rgbToPlanarRgbWrapper;

  1295. 

  1296.     /* bswap 16 bits per pixel/component packed formats */

  1297.     if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||

  1298.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48)  ||

  1299.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||

  1300.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||

  1301.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||

  1302.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||

  1303.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP9)  ||

  1304.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP10) ||

  1305.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP12) ||

  1306.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP14) ||

  1307.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP16) ||

  1308.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRAP16) ||

  1309.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||

  1310.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48)  ||

  1311.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||

  1312.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||

  1313.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565) ||

  1314.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_XYZ12)  ||

  1315.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P9)  ||

  1316.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P10) ||

  1317.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P12) ||

  1318.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P14) ||

  1319.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P16) ||

  1320.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P9)  ||

  1321.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P10) ||

  1322.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P12) ||

  1323.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P14) ||

  1324.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P16) ||

  1325.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P9)  ||

  1326.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P10) ||

  1327.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P12) ||

  1328.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P14) ||

  1329.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P16))

  1330.         c->swscale = packed_16bpc_bswap;

  1331. 

  1332.     if (usePal(srcFormat) && isByteRGB(dstFormat))

  1333.         c->swscale = palToRgbWrapper;

  1334. 

  1335.     if (srcFormat == AV_PIX_FMT_YUV422P) {

  1336.         if (dstFormat == AV_PIX_FMT_YUYV422)

  1337.             c->swscale = yuv422pToYuy2Wrapper;

  1338.         else if (dstFormat == AV_PIX_FMT_UYVY422)

  1339.             c->swscale = yuv422pToUyvyWrapper;

  1340.     }

  1341. 

  1342.     /* LQ converters if -sws 0 or -sws 4*/

  1343.     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  1344.         /* yv12_to_yuy2 */

  1345.         if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {

  1346.             if (dstFormat == AV_PIX_FMT_YUYV422)

  1347.                 c->swscale = planarToYuy2Wrapper;

  1348.             else if (dstFormat == AV_PIX_FMT_UYVY422)

  1349.                 c->swscale = planarToUyvyWrapper;

  1350.         }

  1351.     }

  1352.     if (srcFormat == AV_PIX_FMT_YUYV422 &&

  1353.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1354.         c->swscale = yuyvToYuv420Wrapper;

  1355.     if (srcFormat == AV_PIX_FMT_UYVY422 &&

  1356.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1357.         c->swscale = uyvyToYuv420Wrapper;

  1358.     if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)

  1359.         c->swscale = yuyvToYuv422Wrapper;

  1360.     if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)

  1361.         c->swscale = uyvyToYuv422Wrapper;

  1362. 

  1363. #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)

  1364.     /* simple copy */

  1365.     if ( srcFormat == dstFormat ||

  1366.         (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||

  1367.         (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||

  1368.         (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||

  1369.         (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||

  1370.         (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||

  1371.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

  1372.          c->chrDstHSubSample == c->chrSrcHSubSample &&

  1373.          c->chrDstVSubSample == c->chrSrcVSubSample &&

  1374.          dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&

  1375.          srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))

  1376.     {

  1377.         if (isPacked(c->srcFormat))

  1378.             c->swscale = packedCopyWrapper;

  1379.         else /* Planar YUV or gray */

  1380.             c->swscale = planarCopyWrapper;

  1381.     }

  1382. 

  1383.     if (ARCH_BFIN)

  1384.         ff_get_unscaled_swscale_bfin(c);

  1385.     if (ARCH_PPC)

  1386.         ff_get_unscaled_swscale_ppc(c);

  1387.     if (ARCH_ARM)

  1388.         ff_get_unscaled_swscale_arm(c);

  1389. 

  1390. }

  1391. 

  1392. /* Convert the palette to the same packed 32-bit format as the palette */

  1393. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1394.                                    int num_pixels, const uint8_t *palette)

  1395. {

  1396.     int i;

  1397. 

  1398.     for (i = 0; i < num_pixels; i++)

  1399.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1400. }

  1401. 

  1402. /* Palette format: ABCD -> dst format: ABC */

  1403. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1404.                                    int num_pixels, const uint8_t *palette)

  1405. {

  1406.     int i;

  1407. 

  1408.     for (i = 0; i < num_pixels; i++) {

  1409.         //FIXME slow?

  1410.         dst[0] = palette[src[i] * 4 + 0];

  1411.         dst[1] = palette[src[i] * 4 + 1];

  1412.         dst[2] = palette[src[i] * 4 + 2];

  1413.         dst += 3;

  1414.     }

  1415. }