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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[0]);

  172.     else

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

  174.                         srcStride[2], srcStride[1], dstStride[0]);

  175. 

  176.     return srcSliceH;

  177. }

  178. 

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

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

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

  182. {

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

  184. 

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

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

  187. 

  188.     return srcSliceH;

  189. }

  190. 

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

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

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

  194. {

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

  196. 

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

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

  199. 

  200.     return srcSliceH;

  201. }

  202. 

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

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

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

  206. {

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

  208. 

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

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

  211. 

  212.     return srcSliceH;

  213. }

  214. 

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

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

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

  218. {

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

  220. 

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

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

  223. 

  224.     return srcSliceH;

  225. }

  226. 

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

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

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

  230. {

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

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

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

  234. 

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

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

  237. 

  238.     if (dstParam[3])

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

  240. 

  241.     return srcSliceH;

  242. }

  243. 

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

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

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

  247. {

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

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

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

  251. 

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

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

  254. 

  255.     return srcSliceH;

  256. }

  257. 

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

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

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

  261. {

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

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

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

  265. 

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

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

  268. 

  269.     if (dstParam[3])

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

  271. 

  272.     return srcSliceH;

  273. }

  274. 

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

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

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

  278. {

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

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

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

  282. 

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

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

  285. 

  286.     return srcSliceH;

  287. }

  288. 

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

  290.                              const uint8_t *palette)

  291. {

  292.     int i;

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

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

  295. }

  296. 

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

  298.                                const uint8_t *palette)

  299. {

  300.     int i;

  301. 

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

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

  304. }

  305. 

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

  307.                              const uint8_t *palette)

  308. {

  309.     int i;

  310. 

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

  312.         //FIXME slow?

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

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

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

  316.         dst += 3;

  317.     }

  318. }

  319. 

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

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

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

  323. {

  324.     int i, j, p;

  325. 

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

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

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

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

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

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

  332.         if(!dstPtr || !srcPtr)

  333.             continue;

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

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

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

  337.             }

  338.             srcPtr += srcstr;

  339.             dstPtr += dststr;

  340.         }

  341.     }

  342. 

  343.     return srcSliceH;

  344. }

  345. 

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

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

  348.                            int dstStride[])

  349. {

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

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

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

  353.                  const uint8_t *palette) = NULL;

  354.     int i;

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

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

  357. 

  358.     if (srcFormat == AV_PIX_FMT_GRAY8A) {

  359.         switch (dstFormat) {

  360.         case AV_PIX_FMT_RGB32  : conv = gray8aToPacked32; break;

  361.         case AV_PIX_FMT_BGR32  : conv = gray8aToPacked32; break;

  362.         case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;

  363.         case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;

  364.         case AV_PIX_FMT_RGB24  : conv = gray8aToPacked24; break;

  365.         case AV_PIX_FMT_BGR24  : conv = gray8aToPacked24; break;

  366.         }

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

  368.         switch (dstFormat) {

  369.         case AV_PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;

  370.         case AV_PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;

  371.         case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;

  372.         case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;

  373.         case AV_PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;

  374.         case AV_PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;

  375.         }

  376.     }

  377. 

  378.     if (!conv)

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

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

  381.     else {

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

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

  384.             srcPtr += srcStride[0];

  385.             dstPtr += dstStride[0];

  386.         }

  387.     }

  388. 

  389.     return srcSliceH;

  390. }

  391. 

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

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

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

  395. {

  396.     int x, h, i;

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

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

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

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

  401.         uint16_t component;

  402. 

  403.         switch(swap) {

  404.         case 3:

  405.             if (alpha && !src_alpha) {

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

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

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

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

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

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

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

  413.                     *dest++ = 0xffff;

  414.                 }

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

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

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

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

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

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

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

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

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

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

  425.                 }

  426.             } else {

  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.                 }

  435.             }

  436.             break;

  437.         case 2:

  438.             if (alpha && !src_alpha) {

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

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

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

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

  443.                     *dest++ = 0xffff;

  444.                 }

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

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

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

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

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

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

  451.                 }

  452.             } else {

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

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

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

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

  457.                 }

  458.             }

  459.             break;

  460.         case 1:

  461.             if (alpha && !src_alpha) {

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

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

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

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

  466.                     *dest++ = 0xffff;

  467.                 }

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

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

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

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

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

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

  474.                 }

  475.             } else {

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

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

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

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

  480.                 }

  481.             }

  482.             break;

  483.         default:

  484.             if (alpha && !src_alpha) {

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

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

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

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

  489.                     *dest++ = 0xffff;

  490.                 }

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

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

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

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

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

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

  497.                 }

  498.             } else {

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

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

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

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

  503.                 }

  504.             }

  505.         }

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

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

  508.     }

  509. }

  510. 

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

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

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

  514. {

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

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

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

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

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

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

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

  522.     int swap = 0;

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

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

  525.         swap++;

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

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

  528.         swap += 2;

  529. 

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

  531.         (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB) ||

  532.         bits_per_sample <= 8) {

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

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

  535.         return srcSliceH;

  536.     }

  537.     switch (c->dstFormat) {

  538.     case AV_PIX_FMT_BGR48LE:

  539.     case AV_PIX_FMT_BGR48BE:

  540.         gbr16ptopacked16(src102, stride102,

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

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

  543.         break;

  544.     case AV_PIX_FMT_RGB48LE:

  545.     case AV_PIX_FMT_RGB48BE:

  546.         gbr16ptopacked16(src201, stride201,

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

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

  549.         break;

  550.     case AV_PIX_FMT_RGBA64LE:

  551.     case AV_PIX_FMT_RGBA64BE:

  552.          gbr16ptopacked16(src201, stride201,

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

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

  555.         break;

  556.     case AV_PIX_FMT_BGRA64LE:

  557.     case AV_PIX_FMT_BGRA64BE:

  558.         gbr16ptopacked16(src102, stride102,

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

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

  561.         break;

  562.     default:

  563.         av_log(c, AV_LOG_ERROR,

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

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

  566.     }

  567. 

  568.     return srcSliceH;

  569. }

  570. 

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

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

  573.                              int width)

  574. {

  575.     int x, h, i;

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

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

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

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

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

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

  582.         }

  583. 

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

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

  586.     }

  587. }

  588. 

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

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

  591.                              int alpha_first, int width)

  592. {

  593.     int x, h, i;

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

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

  596. 

  597.         if (alpha_first) {

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

  599.                 *dest++ = 0xff;

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

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

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

  603.             }

  604.         } else {

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

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

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

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

  609.                 *dest++ = 0xff;

  610.             }

  611.         }

  612. 

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

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

  615.     }

  616. }

  617. 

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

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

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

  621. {

  622.     int alpha_first = 0;

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

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

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

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

  627. 

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

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

  630.                av_get_pix_fmt_name(c->srcFormat),

  631.                av_get_pix_fmt_name(c->dstFormat));

  632.         return srcSliceH;

  633.     }

  634. 

  635.     switch (c->dstFormat) {

  636.     case AV_PIX_FMT_BGR24:

  637.         gbr24ptopacked24(src102, stride102,

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

  639.                          srcSliceH, c->srcW);

  640.         break;

  641. 

  642.     case AV_PIX_FMT_RGB24:

  643.         gbr24ptopacked24(src201, stride201,

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

  645.                          srcSliceH, c->srcW);

  646.         break;

  647. 

  648.     case AV_PIX_FMT_ARGB:

  649.         alpha_first = 1;

  650.     case AV_PIX_FMT_RGBA:

  651.         gbr24ptopacked32(src201, stride201,

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

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

  654.         break;

  655. 

  656.     case AV_PIX_FMT_ABGR:

  657.         alpha_first = 1;

  658.     case AV_PIX_FMT_BGRA:

  659.         gbr24ptopacked32(src102, stride102,

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

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

  662.         break;

  663. 

  664.     default:

  665.         av_log(c, AV_LOG_ERROR,

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

  667.                av_get_pix_fmt_name(c->srcFormat),

  668.                av_get_pix_fmt_name(c->dstFormat));

  669.     }

  670. 

  671.     return srcSliceH;

  672. }

  673. 

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

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

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

  677. {

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

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

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

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

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

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

  684.     if (dst[3])

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

  686. 

  687.     return srcSliceH;

  688. }

  689. 

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

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

  692.                            int alpha_first, int inc_size, int width)

  693. {

  694.     uint8_t *dest[3];

  695.     int x, h;

  696. 

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

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

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

  700. 

  701.     if (alpha_first)

  702.         src++;

  703. 

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

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

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

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

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

  709. 

  710.             src += inc_size;

  711.         }

  712.         src     += srcStride - width * inc_size;

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

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

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

  716.     }

  717. }

  718. 

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

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

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

  722. {

  723.     int alpha_first = 0;

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

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

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

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

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

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

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

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

  732. 

  733.     switch (c->srcFormat) {

  734.     case AV_PIX_FMT_RGB24:

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

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

  737.         break;

  738.     case AV_PIX_FMT_BGR24:

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

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

  741.         break;

  742.     case AV_PIX_FMT_ARGB:

  743.         alpha_first = 1;

  744.     case AV_PIX_FMT_RGBA:

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

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

  747.         break;

  748.     case AV_PIX_FMT_ABGR:

  749.         alpha_first = 1;

  750.     case AV_PIX_FMT_BGRA:

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

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

  753.         break;

  754.     default:

  755.         av_log(c, AV_LOG_ERROR,

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

  757.                av_get_pix_fmt_name(c->srcFormat),

  758.                av_get_pix_fmt_name(c->dstFormat));

  759.     }

  760. 

  761.     return srcSliceH;

  762. }

  763. 

  764. #define isRGBA32(x) (            \

  765.            (x) == AV_PIX_FMT_ARGB   \

  766.         || (x) == AV_PIX_FMT_RGBA   \

  767.         || (x) == AV_PIX_FMT_BGRA   \

  768.         || (x) == AV_PIX_FMT_ABGR   \

  769.         )

  770. 

  771. #define isRGBA64(x) (                \

  772.            (x) == AV_PIX_FMT_RGBA64LE   \

  773.         || (x) == AV_PIX_FMT_RGBA64BE   \

  774.         || (x) == AV_PIX_FMT_BGRA64LE   \

  775.         || (x) == AV_PIX_FMT_BGRA64BE   \

  776.         )

  777. 

  778. #define isRGB48(x) (                \

  779.            (x) == AV_PIX_FMT_RGB48LE   \

  780.         || (x) == AV_PIX_FMT_RGB48BE   \

  781.         || (x) == AV_PIX_FMT_BGR48LE   \

  782.         || (x) == AV_PIX_FMT_BGR48BE   \

  783.         )

  784. 

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

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

  787. static rgbConvFn findRgbConvFn(SwsContext *c)

  788. {

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

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

  791.     const int srcId = c->srcFormatBpp;

  792.     const int dstId = c->dstFormatBpp;

  793.     rgbConvFn conv = NULL;

  794. 

  795. #define IS_NOT_NE(bpp, desc) \

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

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

  798. 

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

  800. 

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

  802.         if (     CONV_IS(ABGR, RGBA)

  803.               || CONV_IS(ARGB, BGRA)

  804.               || CONV_IS(BGRA, ARGB)

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

  806.         else if (CONV_IS(ABGR, ARGB)

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

  808.         else if (CONV_IS(ABGR, BGRA)

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

  810.         else if (CONV_IS(BGRA, RGBA)

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

  812.         else if (CONV_IS(BGRA, ABGR)

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

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

  815.         if      (CONV_IS(RGB48LE, BGR48LE)

  816.               || CONV_IS(BGR48LE, RGB48LE)

  817.               || CONV_IS(RGB48BE, BGR48BE)

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

  819.         else if (CONV_IS(RGB48LE, BGR48BE)

  820.               || CONV_IS(BGR48LE, RGB48BE)

  821.               || CONV_IS(RGB48BE, BGR48LE)

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

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

  824.         if      (CONV_IS(RGBA64LE, BGR48LE)

  825.               || CONV_IS(BGRA64LE, RGB48LE)

  826.               || CONV_IS(RGBA64BE, BGR48BE)

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

  828.         else if (CONV_IS(RGBA64LE, BGR48BE)

  829.               || CONV_IS(BGRA64LE, RGB48BE)

  830.               || CONV_IS(RGBA64BE, BGR48LE)

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

  832.         else if (CONV_IS(RGBA64LE, RGB48LE)

  833.               || CONV_IS(BGRA64LE, BGR48LE)

  834.               || CONV_IS(RGBA64BE, RGB48BE)

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

  836.         else if (CONV_IS(RGBA64LE, RGB48BE)

  837.               || CONV_IS(BGRA64LE, BGR48BE)

  838.               || CONV_IS(RGBA64BE, RGB48LE)

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

  840.     } else

  841.     /* BGR -> BGR */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  858.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  878.         }

  879.     }

  880. 

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

  882.         return NULL;

  883. 

  884.     return conv;

  885. }

  886. 

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

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

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

  890.                            int dstStride[])

  891. 

  892. {

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

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

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

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

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

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

  899.     rgbConvFn conv = findRgbConvFn(c);

  900. 

  901.     if (!conv) {

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

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

  904.     } else {

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

  906.               uint8_t *dstPtr = dst[0];

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

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

  909. 

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

  911.             !isRGBA32(dstFormat))

  912.             srcPtr += ALT32_CORR;

  913. 

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

  915.             !isRGBA32(srcFormat)) {

  916.             int i;

  917.             av_assert0(ALT32_CORR == 1);

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

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

  920.             dstPtr += ALT32_CORR;

  921.         }

  922. 

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

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

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

  926.                  srcSliceH * srcStride[0]);

  927.         else {

  928.             int i, j;

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

  930. 

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

  932.                 if(src_bswap) {

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

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

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

  936.                 }else

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

  938.                 if(dst_bswap)

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

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

  941.                 srcPtr += srcStride[0];

  942.                 dstPtr += dstStride[0];

  943.             }

  944.         }

  945.     }

  946.     return srcSliceH;

  947. }

  948. 

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

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

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

  952. {

  953.     ff_rgb24toyv12(

  954.         src[0],

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

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

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

  958.         c->srcW, srcSliceH,

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

  960.         c->input_rgb2yuv_table);

  961.     if (dst[3])

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

  963.     return srcSliceH;

  964. }

  965. 

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

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

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

  969. {

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

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

  972. 

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

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

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

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

  977.     if (dst[3])

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

  979.     return srcSliceH;

  980. }

  981. 

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

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

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

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

  986. {

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

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

  989.     else {

  990.         int i;

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

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

  993.         int length = 0;

  994. 

  995.         /* universal length finder */

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

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

  998.             length += c->srcW;

  999.         av_assert1(length != 0);

  1000. 

  1001.         for (i = 0; i < srcSliceH; i++) {

  1002.             memcpy(dstPtr, srcPtr, length);

  1003.             srcPtr += srcStride[0];

  1004.             dstPtr += dstStride[0];

  1005.         }

  1006.     }

  1007.     return srcSliceH;

  1008. }

  1009. 

  1010. #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\

  1011.     uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\

  1012.     int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\

  1013.     for (i = 0; i < height; i++) {\

  1014.         const uint8_t *dither= dithers[src_depth-9][i&7];\

  1015.         for (j = 0; j < length-7; j+=8){\

  1016.             dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\

  1017.             dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\

  1018.             dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\

  1019.             dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\

  1020.             dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\

  1021.             dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\

  1022.             dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\

  1023.             dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\

  1024.         }\

  1025.         for (; j < length; j++)\

  1026.             dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\

  1027.         dst += dstStride;\

  1028.         src += srcStride;\

  1029.     }

  1030. 

  1031. static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],

  1032.                              int srcStride[], int srcSliceY, int srcSliceH,

  1033.                              uint8_t *dst[], int dstStride[])

  1034. {

  1035.     const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);

  1036.     const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);

  1037.     int plane, i, j;

  1038.     for (plane = 0; plane < 4; plane++) {

  1039.         int length = (plane == 0 || plane == 3) ? c->srcW  : FF_CEIL_RSHIFT(c->srcW,   c->chrDstHSubSample);

  1040.         int y =      (plane == 0 || plane == 3) ? srcSliceY: FF_CEIL_RSHIFT(srcSliceY, c->chrDstVSubSample);

  1041.         int height = (plane == 0 || plane == 3) ? srcSliceH: FF_CEIL_RSHIFT(srcSliceH, c->chrDstVSubSample);

  1042.         const uint8_t *srcPtr = src[plane];

  1043.         uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;

  1044.         int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);

  1045. 

  1046.         if (!dst[plane])

  1047.             continue;

  1048.         // ignore palette for GRAY8

  1049.         if (plane == 1 && !dst[2]) continue;

  1050.         if (!src[plane] || (plane == 1 && !src[2])) {

  1051.             if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {

  1052.                 fillPlane16(dst[plane], dstStride[plane], length, height, y,

  1053.                         plane == 3, desc_dst->comp[plane].depth_minus1,

  1054.                         isBE(c->dstFormat));

  1055.             } else {

  1056.                 fillPlane(dst[plane], dstStride[plane], length, height, y,

  1057.                         (plane == 3) ? 255 : 128);

  1058.             }

  1059.         } else {

  1060.             if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)

  1061.                || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))

  1062.             ) {

  1063.                 const int src_depth = desc_src->comp[plane].depth_minus1 + 1;

  1064.                 const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;

  1065.                 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;

  1066.                 uint16_t *dstPtr2 = (uint16_t*)dstPtr;

  1067. 

  1068.                 if (dst_depth == 8) {

  1069.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1070.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )

  1071.                     } else {

  1072.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )

  1073.                     }

  1074.                 } else if (src_depth == 8) {

  1075.                     for (i = 0; i < height; i++) {

  1076.                         #define COPY816(w)\

  1077.                         if(shiftonly){\

  1078.                             for (j = 0; j < length; j++)\

  1079.                                 w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\

  1080.                         }else{\

  1081.                             for (j = 0; j < length; j++)\

  1082.                                 w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\

  1083.                                                (srcPtr[j]>>(2*8-dst_depth)));\

  1084.                         }

  1085.                         if(isBE(c->dstFormat)){

  1086.                             COPY816(AV_WB16)

  1087.                         } else {

  1088.                             COPY816(AV_WL16)

  1089.                         }

  1090.                         dstPtr2 += dstStride[plane]/2;

  1091.                         srcPtr  += srcStride[plane];

  1092.                     }

  1093.                 } else if (src_depth <= dst_depth) {

  1094.                     int orig_length = length;

  1095.                     for (i = 0; i < height; i++) {

  1096.                         if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&

  1097.                            isBE(c->dstFormat) == HAVE_BIGENDIAN &&

  1098.                            shiftonly) {

  1099.                              unsigned shift = dst_depth - src_depth;

  1100.                              length = orig_length;

  1101. #if HAVE_FAST_64BIT

  1102. #define FAST_COPY_UP(shift) \

  1103.     for (j = 0; j < length - 3; j += 4) { \

  1104.         uint64_t v = AV_RN64A(srcPtr2 + j); \

  1105.         AV_WN64A(dstPtr2 + j, v << shift); \

  1106.     } \

  1107.     length &= 3;

  1108. #else

  1109. #define FAST_COPY_UP(shift) \

  1110.     for (j = 0; j < length - 1; j += 2) { \

  1111.         uint32_t v = AV_RN32A(srcPtr2 + j); \

  1112.         AV_WN32A(dstPtr2 + j, v << shift); \

  1113.     } \

  1114.     length &= 1;

  1115. #endif

  1116.                              switch (shift)

  1117.                              {

  1118.                              case 6: FAST_COPY_UP(6); break;

  1119.                              case 7: FAST_COPY_UP(7); break;

  1120.                              }

  1121.                         }

  1122. #define COPY_UP(r,w) \

  1123.     if(shiftonly){\

  1124.         for (j = 0; j < length; j++){ \

  1125.             unsigned int v= r(&srcPtr2[j]);\

  1126.             w(&dstPtr2[j], v<<(dst_depth-src_depth));\

  1127.         }\

  1128.     }else{\

  1129.         for (j = 0; j < length; j++){ \

  1130.             unsigned int v= r(&srcPtr2[j]);\

  1131.             w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \

  1132.                         (v>>(2*src_depth-dst_depth)));\

  1133.         }\

  1134.     }

  1135.                         if(isBE(c->srcFormat)){

  1136.                             if(isBE(c->dstFormat)){

  1137.                                 COPY_UP(AV_RB16, AV_WB16)

  1138.                             } else {

  1139.                                 COPY_UP(AV_RB16, AV_WL16)

  1140.                             }

  1141.                         } else {

  1142.                             if(isBE(c->dstFormat)){

  1143.                                 COPY_UP(AV_RL16, AV_WB16)

  1144.                             } else {

  1145.                                 COPY_UP(AV_RL16, AV_WL16)

  1146.                             }

  1147.                         }

  1148.                         dstPtr2 += dstStride[plane]/2;

  1149.                         srcPtr2 += srcStride[plane]/2;

  1150.                     }

  1151.                 } else {

  1152.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1153.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1154.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )

  1155.                         } else {

  1156.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)

  1157.                         }

  1158.                     }else{

  1159.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1160.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )

  1161.                         } else {

  1162.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)

  1163.                         }

  1164.                     }

  1165.                 }

  1166.             } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&

  1167.                       isBE(c->srcFormat) != isBE(c->dstFormat)) {

  1168. 

  1169.                 for (i = 0; i < height; i++) {

  1170.                     for (j = 0; j < length; j++)

  1171.                         ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);

  1172.                     srcPtr += srcStride[plane];

  1173.                     dstPtr += dstStride[plane];

  1174.                 }

  1175.             } else if (dstStride[plane] == srcStride[plane] &&

  1176.                        srcStride[plane] > 0 && srcStride[plane] == length) {

  1177.                 memcpy(dst[plane] + dstStride[plane] * y, src[plane],

  1178.                        height * dstStride[plane]);

  1179.             } else {

  1180.                 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  1181.                     length *= 2;

  1182.                 else if (!desc_src->comp[0].depth_minus1)

  1183.                     length >>= 3; // monowhite/black

  1184.                 for (i = 0; i < height; i++) {

  1185.                     memcpy(dstPtr, srcPtr, length);

  1186.                     srcPtr += srcStride[plane];

  1187.                     dstPtr += dstStride[plane];

  1188.                 }

  1189.             }

  1190.         }

  1191.     }

  1192.     return srcSliceH;

  1193. }

  1194. 

  1195. 

  1196. #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt)          \

  1197.     ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) ||     \

  1198.      (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))

  1199. 

  1200. 

  1201. void ff_get_unscaled_swscale(SwsContext *c)

  1202. {

  1203.     const enum AVPixelFormat srcFormat = c->srcFormat;

  1204.     const enum AVPixelFormat dstFormat = c->dstFormat;

  1205.     const int flags = c->flags;

  1206.     const int dstH = c->dstH;

  1207.     int needsDither;

  1208. 

  1209.     needsDither = isAnyRGB(dstFormat) &&

  1210.             c->dstFormatBpp < 24 &&

  1211.            (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));

  1212. 

  1213.     /* yv12_to_nv12 */

  1214.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&

  1215.         (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {

  1216.         c->swscale = planarToNv12Wrapper;

  1217.     }

  1218.     /* yuv2bgr */

  1219.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||

  1220.          srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&

  1221.         !(flags & SWS_ACCURATE_RND) && (c->dither == SWS_DITHER_BAYER || c->dither == SWS_DITHER_AUTO) && !(dstH & 1)) {

  1222.         c->swscale = ff_yuv2rgb_get_func_ptr(c);

  1223.     }

  1224. 

  1225.     if (srcFormat == AV_PIX_FMT_YUV410P &&

  1226.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1227.         !(flags & SWS_BITEXACT)) {

  1228.         c->swscale = yvu9ToYv12Wrapper;

  1229.     }

  1230. 

  1231.     /* bgr24toYV12 */

  1232.     if (srcFormat == AV_PIX_FMT_BGR24 &&

  1233.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1234.         !(flags & SWS_ACCURATE_RND))

  1235.         c->swscale = bgr24ToYv12Wrapper;

  1236. 

  1237.     /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  1238.     if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)

  1239.         && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  1240.         c->swscale = rgbToRgbWrapper;

  1241. 

  1242.     if ((srcFormat == AV_PIX_FMT_GBRP && dstFormat == AV_PIX_FMT_GBRAP) ||

  1243.         (srcFormat == AV_PIX_FMT_GBRAP && dstFormat == AV_PIX_FMT_GBRP))

  1244.         c->swscale = planarRgbToplanarRgbWrapper;

  1245. 

  1246. #define isByteRGB(f) (             \

  1247.         f == AV_PIX_FMT_RGB32   || \

  1248.         f == AV_PIX_FMT_RGB32_1 || \

  1249.         f == AV_PIX_FMT_RGB24   || \

  1250.         f == AV_PIX_FMT_BGR32   || \

  1251.         f == AV_PIX_FMT_BGR32_1 || \

  1252.         f == AV_PIX_FMT_BGR24)

  1253. 

  1254.     if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))

  1255.         c->swscale = planarRgbToRgbWrapper;

  1256. 

  1257.     if ((srcFormat == AV_PIX_FMT_GBRP9LE  || srcFormat == AV_PIX_FMT_GBRP9BE  ||

  1258.          srcFormat == AV_PIX_FMT_GBRP16LE || srcFormat == AV_PIX_FMT_GBRP16BE ||

  1259.          srcFormat == AV_PIX_FMT_GBRP10LE || srcFormat == AV_PIX_FMT_GBRP10BE ||

  1260.          srcFormat == AV_PIX_FMT_GBRP12LE || srcFormat == AV_PIX_FMT_GBRP12BE ||

  1261.          srcFormat == AV_PIX_FMT_GBRP14LE || srcFormat == AV_PIX_FMT_GBRP14BE ||

  1262.          srcFormat == AV_PIX_FMT_GBRAP16LE || srcFormat == AV_PIX_FMT_GBRAP16BE) &&

  1263.         (dstFormat == AV_PIX_FMT_RGB48LE  || dstFormat == AV_PIX_FMT_RGB48BE  ||

  1264.          dstFormat == AV_PIX_FMT_BGR48LE  || dstFormat == AV_PIX_FMT_BGR48BE  ||

  1265.          dstFormat == AV_PIX_FMT_RGBA64LE || dstFormat == AV_PIX_FMT_RGBA64BE ||

  1266.          dstFormat == AV_PIX_FMT_BGRA64LE || dstFormat == AV_PIX_FMT_BGRA64BE))

  1267.         c->swscale = planarRgb16ToRgb16Wrapper;

  1268. 

  1269.     if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&

  1270.         isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)

  1271.         c->swscale = rgbToPlanarRgbWrapper;

  1272. 

  1273.     /* bswap 16 bits per pixel/component packed formats */

  1274.     if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||

  1275.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48)  ||

  1276.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||

  1277.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||

  1278.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||

  1279.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||

  1280.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP9)  ||

  1281.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP10) ||

  1282.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP12) ||

  1283.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP14) ||

  1284.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP16) ||

  1285.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRAP16) ||

  1286.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||

  1287.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48)  ||

  1288.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||

  1289.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||

  1290.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565) ||

  1291.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_XYZ12)  ||

  1292.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P9)  ||

  1293.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P10) ||

  1294.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P12) ||

  1295.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P14) ||

  1296.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P16) ||

  1297.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P9)  ||

  1298.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P10) ||

  1299.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P12) ||

  1300.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P14) ||

  1301.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P16) ||

  1302.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P9)  ||

  1303.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P10) ||

  1304.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P12) ||

  1305.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P14) ||

  1306.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P16))

  1307.         c->swscale = packed_16bpc_bswap;

  1308. 

  1309.     if (usePal(srcFormat) && isByteRGB(dstFormat))

  1310.         c->swscale = palToRgbWrapper;

  1311. 

  1312.     if (srcFormat == AV_PIX_FMT_YUV422P) {

  1313.         if (dstFormat == AV_PIX_FMT_YUYV422)

  1314.             c->swscale = yuv422pToYuy2Wrapper;

  1315.         else if (dstFormat == AV_PIX_FMT_UYVY422)

  1316.             c->swscale = yuv422pToUyvyWrapper;

  1317.     }

  1318. 

  1319.     /* LQ converters if -sws 0 or -sws 4*/

  1320.     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  1321.         /* yv12_to_yuy2 */

  1322.         if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {

  1323.             if (dstFormat == AV_PIX_FMT_YUYV422)

  1324.                 c->swscale = planarToYuy2Wrapper;

  1325.             else if (dstFormat == AV_PIX_FMT_UYVY422)

  1326.                 c->swscale = planarToUyvyWrapper;

  1327.         }

  1328.     }

  1329.     if (srcFormat == AV_PIX_FMT_YUYV422 &&

  1330.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1331.         c->swscale = yuyvToYuv420Wrapper;

  1332.     if (srcFormat == AV_PIX_FMT_UYVY422 &&

  1333.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1334.         c->swscale = uyvyToYuv420Wrapper;

  1335.     if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)

  1336.         c->swscale = yuyvToYuv422Wrapper;

  1337.     if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)

  1338.         c->swscale = uyvyToYuv422Wrapper;

  1339. 

  1340. #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)

  1341.     /* simple copy */

  1342.     if ( srcFormat == dstFormat ||

  1343.         (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||

  1344.         (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||

  1345.         (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||

  1346.         (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||

  1347.         (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||

  1348.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

  1349.          c->chrDstHSubSample == c->chrSrcHSubSample &&

  1350.          c->chrDstVSubSample == c->chrSrcVSubSample &&

  1351.          dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&

  1352.          srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))

  1353.     {

  1354.         if (isPacked(c->srcFormat))

  1355.             c->swscale = packedCopyWrapper;

  1356.         else /* Planar YUV or gray */

  1357.             c->swscale = planarCopyWrapper;

  1358.     }

  1359. 

  1360.     if (ARCH_BFIN)

  1361.         ff_get_unscaled_swscale_bfin(c);

  1362.     if (ARCH_PPC)

  1363.         ff_get_unscaled_swscale_ppc(c);

  1364. }

  1365. 

  1366. /* Convert the palette to the same packed 32-bit format as the palette */

  1367. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1368.                                    int num_pixels, const uint8_t *palette)

  1369. {

  1370.     int i;

  1371. 

  1372.     for (i = 0; i < num_pixels; i++)

  1373.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1374. }

  1375. 

  1376. /* Palette format: ABCD -> dst format: ABC */

  1377. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1378.                                    int num_pixels, const uint8_t *palette)

  1379. {

  1380.     int i;

  1381. 

  1382.     for (i = 0; i < num_pixels; i++) {

  1383.         //FIXME slow?

  1384.         dst[0] = palette[src[i] * 4 + 0];

  1385.         dst[1] = palette[src[i] * 4 + 1];

  1386.         dst[2] = palette[src[i] * 4 + 2];

  1387.         dst += 3;

  1388.     }

  1389. }