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

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

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

  400.         uint16_t component;

  401. 

  402.         switch(swap) {

  403.         case 3:

  404.             if (alpha) {

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

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

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

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

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

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

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

  412.                     *dest++ = 0xffff;

  413.                 }

  414.             } else {

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

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

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

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

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

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

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

  422.                 }

  423.             }

  424.             break;

  425.         case 2:

  426.             if (alpha) {

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

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

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

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

  431.                     *dest++ = 0xffff;

  432.                 }

  433.             } else {

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

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

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

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

  438.                 }

  439.             }

  440.             break;

  441.         case 1:

  442.             if (alpha) {

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

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

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

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

  447.                     *dest++ = 0xffff;

  448.                 }

  449.             } else {

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

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

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

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

  454.                 }

  455.             }

  456.             break;

  457.         default:

  458.             if (alpha) {

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

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

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

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

  463.                     *dest++ = 0xffff;

  464.                 }

  465.             } else {

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

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

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

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

  470.                 }

  471.             }

  472.         }

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

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

  475.     }

  476. }

  477. 

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

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

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

  481. {

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

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

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

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

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

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

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

  489.     int swap = 0;

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

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

  492.         swap++;

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

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

  495.         swap += 2;

  496. 

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

  498.         (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) {

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

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

  501.         return srcSliceH;

  502.     }

  503.     switch (c->dstFormat) {

  504.     case AV_PIX_FMT_BGR48LE:

  505.     case AV_PIX_FMT_BGR48BE:

  506.         gbr16ptopacked16(src102, stride102,

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

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

  509.         break;

  510.     case AV_PIX_FMT_RGB48LE:

  511.     case AV_PIX_FMT_RGB48BE:

  512.         gbr16ptopacked16(src201, stride201,

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

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

  515.         break;

  516.     case AV_PIX_FMT_RGBA64LE:

  517.     case AV_PIX_FMT_RGBA64BE:

  518.          gbr16ptopacked16(src201, stride201,

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

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

  521.         break;

  522.     case AV_PIX_FMT_BGRA64LE:

  523.     case AV_PIX_FMT_BGRA64BE:

  524.         gbr16ptopacked16(src102, stride102,

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

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

  527.         break;

  528.     default:

  529.         av_log(c, AV_LOG_ERROR,

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

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

  532.     }

  533. 

  534.     return srcSliceH;

  535. }

  536. 

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

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

  539.                              int width)

  540. {

  541.     int x, h, i;

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

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

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

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

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

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

  548.         }

  549. 

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

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

  552.     }

  553. }

  554. 

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

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

  557.                              int alpha_first, int width)

  558. {

  559.     int x, h, i;

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

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

  562. 

  563.         if (alpha_first) {

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

  565.                 *dest++ = 0xff;

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

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

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

  569.             }

  570.         } else {

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

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

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

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

  575.                 *dest++ = 0xff;

  576.             }

  577.         }

  578. 

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

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

  581.     }

  582. }

  583. 

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

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

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

  587. {

  588.     int alpha_first = 0;

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

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

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

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

  593. 

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

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

  596.                av_get_pix_fmt_name(c->srcFormat),

  597.                av_get_pix_fmt_name(c->dstFormat));

  598.         return srcSliceH;

  599.     }

  600. 

  601.     switch (c->dstFormat) {

  602.     case AV_PIX_FMT_BGR24:

  603.         gbr24ptopacked24(src102, stride102,

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

  605.                          srcSliceH, c->srcW);

  606.         break;

  607. 

  608.     case AV_PIX_FMT_RGB24:

  609.         gbr24ptopacked24(src201, stride201,

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

  611.                          srcSliceH, c->srcW);

  612.         break;

  613. 

  614.     case AV_PIX_FMT_ARGB:

  615.         alpha_first = 1;

  616.     case AV_PIX_FMT_RGBA:

  617.         gbr24ptopacked32(src201, stride201,

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

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

  620.         break;

  621. 

  622.     case AV_PIX_FMT_ABGR:

  623.         alpha_first = 1;

  624.     case AV_PIX_FMT_BGRA:

  625.         gbr24ptopacked32(src102, stride102,

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

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

  628.         break;

  629. 

  630.     default:

  631.         av_log(c, AV_LOG_ERROR,

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

  633.                av_get_pix_fmt_name(c->srcFormat),

  634.                av_get_pix_fmt_name(c->dstFormat));

  635.     }

  636. 

  637.     return srcSliceH;

  638. }

  639. 

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

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

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

  643. {

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

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

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

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

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

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

  650.     if (dst[3])

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

  652. 

  653.     return srcSliceH;

  654. }

  655. 

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

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

  658.                            int alpha_first, int inc_size, int width)

  659. {

  660.     uint8_t *dest[3];

  661.     int x, h;

  662. 

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

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

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

  666. 

  667.     if (alpha_first)

  668.         src++;

  669. 

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

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

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

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

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

  675. 

  676.             src += inc_size;

  677.         }

  678.         src     += srcStride - width * inc_size;

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

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

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

  682.     }

  683. }

  684. 

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

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

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

  688. {

  689.     int alpha_first = 0;

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

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

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

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

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

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

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

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

  698. 

  699.     switch (c->srcFormat) {

  700.     case AV_PIX_FMT_RGB24:

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

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

  703.         break;

  704.     case AV_PIX_FMT_BGR24:

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

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

  707.         break;

  708.     case AV_PIX_FMT_ARGB:

  709.         alpha_first = 1;

  710.     case AV_PIX_FMT_RGBA:

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

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

  713.         break;

  714.     case AV_PIX_FMT_ABGR:

  715.         alpha_first = 1;

  716.     case AV_PIX_FMT_BGRA:

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

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

  719.         break;

  720.     default:

  721.         av_log(c, AV_LOG_ERROR,

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

  723.                av_get_pix_fmt_name(c->srcFormat),

  724.                av_get_pix_fmt_name(c->dstFormat));

  725.     }

  726. 

  727.     return srcSliceH;

  728. }

  729. 

  730. #define isRGBA32(x) (            \

  731.            (x) == AV_PIX_FMT_ARGB   \

  732.         || (x) == AV_PIX_FMT_RGBA   \

  733.         || (x) == AV_PIX_FMT_BGRA   \

  734.         || (x) == AV_PIX_FMT_ABGR   \

  735.         )

  736. 

  737. #define isRGBA64(x) (                \

  738.            (x) == AV_PIX_FMT_RGBA64LE   \

  739.         || (x) == AV_PIX_FMT_RGBA64BE   \

  740.         || (x) == AV_PIX_FMT_BGRA64LE   \

  741.         || (x) == AV_PIX_FMT_BGRA64BE   \

  742.         )

  743. 

  744. #define isRGB48(x) (                \

  745.            (x) == AV_PIX_FMT_RGB48LE   \

  746.         || (x) == AV_PIX_FMT_RGB48BE   \

  747.         || (x) == AV_PIX_FMT_BGR48LE   \

  748.         || (x) == AV_PIX_FMT_BGR48BE   \

  749.         )

  750. 

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

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

  753. static rgbConvFn findRgbConvFn(SwsContext *c)

  754. {

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

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

  757.     const int srcId = c->srcFormatBpp;

  758.     const int dstId = c->dstFormatBpp;

  759.     rgbConvFn conv = NULL;

  760. 

  761. #define IS_NOT_NE(bpp, desc) \

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

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

  764. 

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

  766. 

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

  768.         if (     CONV_IS(ABGR, RGBA)

  769.               || CONV_IS(ARGB, BGRA)

  770.               || CONV_IS(BGRA, ARGB)

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

  772.         else if (CONV_IS(ABGR, ARGB)

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

  774.         else if (CONV_IS(ABGR, BGRA)

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

  776.         else if (CONV_IS(BGRA, RGBA)

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

  778.         else if (CONV_IS(BGRA, ABGR)

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

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

  781.         if      (CONV_IS(RGB48LE, BGR48LE)

  782.               || CONV_IS(BGR48LE, RGB48LE)

  783.               || CONV_IS(RGB48BE, BGR48BE)

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

  785.         else if (CONV_IS(RGB48LE, BGR48BE)

  786.               || CONV_IS(BGR48LE, RGB48BE)

  787.               || CONV_IS(RGB48BE, BGR48LE)

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

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

  790.         if      (CONV_IS(RGBA64LE, BGR48LE)

  791.               || CONV_IS(BGRA64LE, RGB48LE)

  792.               || CONV_IS(RGBA64BE, BGR48BE)

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

  794.         else if (CONV_IS(RGBA64LE, BGR48BE)

  795.               || CONV_IS(BGRA64LE, RGB48BE)

  796.               || CONV_IS(RGBA64BE, BGR48LE)

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

  798.         else if (CONV_IS(RGBA64LE, RGB48LE)

  799.               || CONV_IS(BGRA64LE, BGR48LE)

  800.               || CONV_IS(RGBA64BE, RGB48BE)

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

  802.         else if (CONV_IS(RGBA64LE, RGB48BE)

  803.               || CONV_IS(BGRA64LE, BGR48BE)

  804.               || CONV_IS(RGBA64BE, RGB48LE)

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

  806.     } else

  807.     /* BGR -> BGR */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  824.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  844.         }

  845.     }

  846. 

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

  848.         return NULL;

  849. 

  850.     return conv;

  851. }

  852. 

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

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

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

  856.                            int dstStride[])

  857. 

  858. {

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

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

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

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

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

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

  865.     rgbConvFn conv = findRgbConvFn(c);

  866. 

  867.     if (!conv) {

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

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

  870.     } else {

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

  872.               uint8_t *dstPtr = dst[0];

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

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

  875. 

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

  877.             !isRGBA32(dstFormat))

  878.             srcPtr += ALT32_CORR;

  879. 

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

  881.             !isRGBA32(srcFormat))

  882.             dstPtr += ALT32_CORR;

  883. 

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

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

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

  887.                  srcSliceH * srcStride[0]);

  888.         else {

  889.             int i, j;

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

  891. 

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

  893.                 if(src_bswap) {

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

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

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

  897.                 }else

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

  899.                 if(dst_bswap)

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

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

  902.                 srcPtr += srcStride[0];

  903.                 dstPtr += dstStride[0];

  904.             }

  905.         }

  906.     }

  907.     return srcSliceH;

  908. }

  909. 

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

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

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

  913. {

  914.     ff_rgb24toyv12(

  915.         src[0],

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

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

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

  919.         c->srcW, srcSliceH,

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

  921.         c->input_rgb2yuv_table);

  922.     if (dst[3])

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

  924.     return srcSliceH;

  925. }

  926. 

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

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

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

  930. {

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

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

  933. 

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

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

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

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

  938.     if (dst[3])

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

  940.     return srcSliceH;

  941. }

  942. 

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

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

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

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

  947. {

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

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

  950.     else {

  951.         int i;

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

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

  954.         int length = 0;

  955. 

  956.         /* universal length finder */

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

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

  959.             length += c->srcW;

  960.         av_assert1(length != 0);

  961. 

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

  963.             memcpy(dstPtr, srcPtr, length);

  964.             srcPtr += srcStride[0];

  965.             dstPtr += dstStride[0];

  966.         }

  967.     }

  968.     return srcSliceH;

  969. }

  970. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  985.         }\

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

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

  988.         dst += dstStride;\

  989.         src += srcStride;\

  990.     }

  991. 

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

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

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

  995. {

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

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

  998.     int plane, i, j;

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

  1000.         int length = (plane == 0 || plane == 3) ? c->srcW  : FF_CEIL_RSHIFT(c->srcW,   c->chrDstHSubSample);

  1001.         int y =      (plane == 0 || plane == 3) ? srcSliceY: FF_CEIL_RSHIFT(srcSliceY, c->chrDstVSubSample);

  1002.         int height = (plane == 0 || plane == 3) ? srcSliceH: FF_CEIL_RSHIFT(srcSliceH, c->chrDstVSubSample);

  1003.         const uint8_t *srcPtr = src[plane];

  1004.         uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;

  1005.         int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);

  1006. 

  1007.         if (!dst[plane])

  1008.             continue;

  1009.         // ignore palette for GRAY8

  1010.         if (plane == 1 && !dst[2]) continue;

  1011.         if (!src[plane] || (plane == 1 && !src[2])) {

  1012.             if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {

  1013.                 fillPlane16(dst[plane], dstStride[plane], length, height, y,

  1014.                         plane == 3, desc_dst->comp[plane].depth_minus1,

  1015.                         isBE(c->dstFormat));

  1016.             } else {

  1017.                 fillPlane(dst[plane], dstStride[plane], length, height, y,

  1018.                         (plane == 3) ? 255 : 128);

  1019.             }

  1020.         } else {

  1021.             if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)

  1022.                || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))

  1023.             ) {

  1024.                 const int src_depth = desc_src->comp[plane].depth_minus1 + 1;

  1025.                 const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;

  1026.                 const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;

  1027.                 uint16_t *dstPtr2 = (uint16_t*)dstPtr;

  1028. 

  1029.                 if (dst_depth == 8) {

  1030.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1031.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )

  1032.                     } else {

  1033.                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )

  1034.                     }

  1035.                 } else if (src_depth == 8) {

  1036.                     for (i = 0; i < height; i++) {

  1037.                         #define COPY816(w)\

  1038.                         if(shiftonly){\

  1039.                             for (j = 0; j < length; j++)\

  1040.                                 w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\

  1041.                         }else{\

  1042.                             for (j = 0; j < length; j++)\

  1043.                                 w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\

  1044.                                                (srcPtr[j]>>(2*8-dst_depth)));\

  1045.                         }

  1046.                         if(isBE(c->dstFormat)){

  1047.                             COPY816(AV_WB16)

  1048.                         } else {

  1049.                             COPY816(AV_WL16)

  1050.                         }

  1051.                         dstPtr2 += dstStride[plane]/2;

  1052.                         srcPtr  += srcStride[plane];

  1053.                     }

  1054.                 } else if (src_depth <= dst_depth) {

  1055.                     int orig_length = length;

  1056.                     for (i = 0; i < height; i++) {

  1057.                         if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&

  1058.                            isBE(c->dstFormat) == HAVE_BIGENDIAN &&

  1059.                            shiftonly) {

  1060.                              unsigned shift = dst_depth - src_depth;

  1061.                              length = orig_length;

  1062. #if HAVE_FAST_64BIT

  1063. #define FAST_COPY_UP(shift) \

  1064.     for (j = 0; j < length - 3; j += 4) { \

  1065.         uint64_t v = AV_RN64A(srcPtr2 + j); \

  1066.         AV_WN64A(dstPtr2 + j, v << shift); \

  1067.     } \

  1068.     length &= 3;

  1069. #else

  1070. #define FAST_COPY_UP(shift) \

  1071.     for (j = 0; j < length - 1; j += 2) { \

  1072.         uint32_t v = AV_RN32A(srcPtr2 + j); \

  1073.         AV_WN32A(dstPtr2 + j, v << shift); \

  1074.     } \

  1075.     length &= 1;

  1076. #endif

  1077.                              switch (shift)

  1078.                              {

  1079.                              case 6: FAST_COPY_UP(6); break;

  1080.                              case 7: FAST_COPY_UP(7); break;

  1081.                              }

  1082.                         }

  1083. #define COPY_UP(r,w) \

  1084.     if(shiftonly){\

  1085.         for (j = 0; j < length; j++){ \

  1086.             unsigned int v= r(&srcPtr2[j]);\

  1087.             w(&dstPtr2[j], v<<(dst_depth-src_depth));\

  1088.         }\

  1089.     }else{\

  1090.         for (j = 0; j < length; j++){ \

  1091.             unsigned int v= r(&srcPtr2[j]);\

  1092.             w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \

  1093.                         (v>>(2*src_depth-dst_depth)));\

  1094.         }\

  1095.     }

  1096.                         if(isBE(c->srcFormat)){

  1097.                             if(isBE(c->dstFormat)){

  1098.                                 COPY_UP(AV_RB16, AV_WB16)

  1099.                             } else {

  1100.                                 COPY_UP(AV_RB16, AV_WL16)

  1101.                             }

  1102.                         } else {

  1103.                             if(isBE(c->dstFormat)){

  1104.                                 COPY_UP(AV_RL16, AV_WB16)

  1105.                             } else {

  1106.                                 COPY_UP(AV_RL16, AV_WL16)

  1107.                             }

  1108.                         }

  1109.                         dstPtr2 += dstStride[plane]/2;

  1110.                         srcPtr2 += srcStride[plane]/2;

  1111.                     }

  1112.                 } else {

  1113.                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){

  1114.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1115.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )

  1116.                         } else {

  1117.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)

  1118.                         }

  1119.                     }else{

  1120.                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){

  1121.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )

  1122.                         } else {

  1123.                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)

  1124.                         }

  1125.                     }

  1126.                 }

  1127.             } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&

  1128.                       isBE(c->srcFormat) != isBE(c->dstFormat)) {

  1129. 

  1130.                 for (i = 0; i < height; i++) {

  1131.                     for (j = 0; j < length; j++)

  1132.                         ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);

  1133.                     srcPtr += srcStride[plane];

  1134.                     dstPtr += dstStride[plane];

  1135.                 }

  1136.             } else if (dstStride[plane] == srcStride[plane] &&

  1137.                        srcStride[plane] > 0 && srcStride[plane] == length) {

  1138.                 memcpy(dst[plane] + dstStride[plane] * y, src[plane],

  1139.                        height * dstStride[plane]);

  1140.             } else {

  1141.                 if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  1142.                     length *= 2;

  1143.                 else if (!desc_src->comp[0].depth_minus1)

  1144.                     length >>= 3; // monowhite/black

  1145.                 for (i = 0; i < height; i++) {

  1146.                     memcpy(dstPtr, srcPtr, length);

  1147.                     srcPtr += srcStride[plane];

  1148.                     dstPtr += dstStride[plane];

  1149.                 }

  1150.             }

  1151.         }

  1152.     }

  1153.     return srcSliceH;

  1154. }

  1155. 

  1156. 

  1157. #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt)          \

  1158.     ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) ||     \

  1159.      (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))

  1160. 

  1161. 

  1162. void ff_get_unscaled_swscale(SwsContext *c)

  1163. {

  1164.     const enum AVPixelFormat srcFormat = c->srcFormat;

  1165.     const enum AVPixelFormat dstFormat = c->dstFormat;

  1166.     const int flags = c->flags;

  1167.     const int dstH = c->dstH;

  1168.     int needsDither;

  1169. 

  1170.     needsDither = isAnyRGB(dstFormat) &&

  1171.             c->dstFormatBpp < 24 &&

  1172.            (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));

  1173. 

  1174.     /* yv12_to_nv12 */

  1175.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&

  1176.         (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {

  1177.         c->swScale = planarToNv12Wrapper;

  1178.     }

  1179.     /* yuv2bgr */

  1180.     if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||

  1181.          srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&

  1182.         !(flags & (SWS_ACCURATE_RND|SWS_ERROR_DIFFUSION)) && !(dstH & 1)) {

  1183.         c->swScale = ff_yuv2rgb_get_func_ptr(c);

  1184.     }

  1185. 

  1186.     if (srcFormat == AV_PIX_FMT_YUV410P &&

  1187.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1188.         !(flags & SWS_BITEXACT)) {

  1189.         c->swScale = yvu9ToYv12Wrapper;

  1190.     }

  1191. 

  1192.     /* bgr24toYV12 */

  1193.     if (srcFormat == AV_PIX_FMT_BGR24 &&

  1194.         (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&

  1195.         !(flags & SWS_ACCURATE_RND))

  1196.         c->swScale = bgr24ToYv12Wrapper;

  1197. 

  1198.     /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  1199.     if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)

  1200.         && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  1201.         c->swScale= rgbToRgbWrapper;

  1202. 

  1203.     if ((srcFormat == AV_PIX_FMT_GBRP && dstFormat == AV_PIX_FMT_GBRAP) ||

  1204.         (srcFormat == AV_PIX_FMT_GBRAP && dstFormat == AV_PIX_FMT_GBRP))

  1205.         c->swScale = planarRgbToplanarRgbWrapper;

  1206. 

  1207. #define isByteRGB(f) (             \

  1208.         f == AV_PIX_FMT_RGB32   || \

  1209.         f == AV_PIX_FMT_RGB32_1 || \

  1210.         f == AV_PIX_FMT_RGB24   || \

  1211.         f == AV_PIX_FMT_BGR32   || \

  1212.         f == AV_PIX_FMT_BGR32_1 || \

  1213.         f == AV_PIX_FMT_BGR24)

  1214. 

  1215.     if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))

  1216.         c->swScale = planarRgbToRgbWrapper;

  1217. 

  1218.     if ((srcFormat == AV_PIX_FMT_GBRP9LE  || srcFormat == AV_PIX_FMT_GBRP9BE  ||

  1219.          srcFormat == AV_PIX_FMT_GBRP16LE || srcFormat == AV_PIX_FMT_GBRP16BE ||

  1220.          srcFormat == AV_PIX_FMT_GBRP10LE || srcFormat == AV_PIX_FMT_GBRP10BE ||

  1221.          srcFormat == AV_PIX_FMT_GBRP12LE || srcFormat == AV_PIX_FMT_GBRP12BE ||

  1222.          srcFormat == AV_PIX_FMT_GBRP14LE || srcFormat == AV_PIX_FMT_GBRP14BE) &&

  1223.         (dstFormat == AV_PIX_FMT_RGB48LE  || dstFormat == AV_PIX_FMT_RGB48BE  ||

  1224.          dstFormat == AV_PIX_FMT_BGR48LE  || dstFormat == AV_PIX_FMT_BGR48BE  ||

  1225.          dstFormat == AV_PIX_FMT_RGBA64LE || dstFormat == AV_PIX_FMT_RGBA64BE ||

  1226.          dstFormat == AV_PIX_FMT_BGRA64LE || dstFormat == AV_PIX_FMT_BGRA64BE))

  1227.         c->swScale = planarRgb16ToRgb16Wrapper;

  1228. 

  1229.     if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&

  1230.         isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)

  1231.         c->swScale = rgbToPlanarRgbWrapper;

  1232. 

  1233.     /* bswap 16 bits per pixel/component packed formats */

  1234.     if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||

  1235.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48)  ||

  1236.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||

  1237.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||

  1238.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||

  1239.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||

  1240.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP9)  ||

  1241.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP10) ||

  1242.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP12) ||

  1243.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP14) ||

  1244.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP16) ||

  1245.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRAP16) ||

  1246.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||

  1247.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48)  ||

  1248.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||

  1249.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||

  1250.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565) ||

  1251.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_XYZ12)  ||

  1252.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P9)  ||

  1253.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P10) ||

  1254.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P12) ||

  1255.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P14) ||

  1256.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P16) ||

  1257.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P9)  ||

  1258.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P10) ||

  1259.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P12) ||

  1260.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P14) ||

  1261.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P16) ||

  1262.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P9)  ||

  1263.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P10) ||

  1264.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P12) ||

  1265.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P14) ||

  1266.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P16))

  1267.         c->swScale = packed_16bpc_bswap;

  1268. 

  1269.     if (usePal(srcFormat) && isByteRGB(dstFormat))

  1270.         c->swScale = palToRgbWrapper;

  1271. 

  1272.     if (srcFormat == AV_PIX_FMT_YUV422P) {

  1273.         if (dstFormat == AV_PIX_FMT_YUYV422)

  1274.             c->swScale = yuv422pToYuy2Wrapper;

  1275.         else if (dstFormat == AV_PIX_FMT_UYVY422)

  1276.             c->swScale = yuv422pToUyvyWrapper;

  1277.     }

  1278. 

  1279.     /* LQ converters if -sws 0 or -sws 4*/

  1280.     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  1281.         /* yv12_to_yuy2 */

  1282.         if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {

  1283.             if (dstFormat == AV_PIX_FMT_YUYV422)

  1284.                 c->swScale = planarToYuy2Wrapper;

  1285.             else if (dstFormat == AV_PIX_FMT_UYVY422)

  1286.                 c->swScale = planarToUyvyWrapper;

  1287.         }

  1288.     }

  1289.     if (srcFormat == AV_PIX_FMT_YUYV422 &&

  1290.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1291.         c->swScale = yuyvToYuv420Wrapper;

  1292.     if (srcFormat == AV_PIX_FMT_UYVY422 &&

  1293.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1294.         c->swScale = uyvyToYuv420Wrapper;

  1295.     if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)

  1296.         c->swScale = yuyvToYuv422Wrapper;

  1297.     if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)

  1298.         c->swScale = uyvyToYuv422Wrapper;

  1299. 

  1300. #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)

  1301.     /* simple copy */

  1302.     if ( srcFormat == dstFormat ||

  1303.         (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||

  1304.         (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||

  1305.         (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||

  1306.         (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||

  1307.         (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||

  1308.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

  1309.          c->chrDstHSubSample == c->chrSrcHSubSample &&

  1310.          c->chrDstVSubSample == c->chrSrcVSubSample &&

  1311.          dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&

  1312.          srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))

  1313.     {

  1314.         if (isPacked(c->srcFormat))

  1315.             c->swScale = packedCopyWrapper;

  1316.         else /* Planar YUV or gray */

  1317.             c->swScale = planarCopyWrapper;

  1318.     }

  1319. 

  1320.     if (ARCH_BFIN)

  1321.         ff_bfin_get_unscaled_swscale(c);

  1322.     if (HAVE_ALTIVEC)

  1323.         ff_swscale_get_unscaled_altivec(c);

  1324. }

  1325. 

  1326. /* Convert the palette to the same packed 32-bit format as the palette */

  1327. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1328.                                    int num_pixels, const uint8_t *palette)

  1329. {

  1330.     int i;

  1331. 

  1332.     for (i = 0; i < num_pixels; i++)

  1333.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1334. }

  1335. 

  1336. /* Palette format: ABCD -> dst format: ABC */

  1337. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1338.                                    int num_pixels, const uint8_t *palette)

  1339. {

  1340.     int i;

  1341. 

  1342.     for (i = 0; i < num_pixels; i++) {

  1343.         //FIXME slow?

  1344.         dst[0] = palette[src[i] * 4 + 0];

  1345.         dst[1] = palette[src[i] * 4 + 1];

  1346.         dst[2] = palette[src[i] * 4 + 2];

  1347.         dst += 3;

  1348.     }

  1349. }