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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;

  325.     int srcstr = srcStride[0] >> 1;

  326.     int dststr = dstStride[0] >> 1;

  327.     uint16_t       *dstPtr =       (uint16_t *) dst[0];

  328.     const uint16_t *srcPtr = (const uint16_t *) src[0];

  329.     int min_stride         = FFMIN(srcstr, dststr);

  330. 

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

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

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

  334.         }

  335.         srcPtr += srcstr;

  336.         dstPtr += dststr;

  337.     }

  338. 

  339.     return srcSliceH;

  340. }

  341. 

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

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

  344.                            int dstStride[])

  345. {

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

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

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

  349.                  const uint8_t *palette) = NULL;

  350.     int i;

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

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

  353. 

  354.     if (srcFormat == AV_PIX_FMT_GRAY8A) {

  355.         switch (dstFormat) {

  356.         case AV_PIX_FMT_RGB32  : conv = gray8aToPacked32; break;

  357.         case AV_PIX_FMT_BGR32  : conv = gray8aToPacked32; break;

  358.         case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;

  359.         case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;

  360.         case AV_PIX_FMT_RGB24  : conv = gray8aToPacked24; break;

  361.         case AV_PIX_FMT_BGR24  : conv = gray8aToPacked24; break;

  362.         }

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

  364.         switch (dstFormat) {

  365.         case AV_PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;

  366.         case AV_PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;

  367.         case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;

  368.         case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;

  369.         case AV_PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;

  370.         case AV_PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;

  371.         }

  372.     }

  373. 

  374.     if (!conv)

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

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

  377.     else {

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

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

  380.             srcPtr += srcStride[0];

  381.             dstPtr += dstStride[0];

  382.         }

  383.     }

  384. 

  385.     return srcSliceH;

  386. }

  387. 

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

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

  390.                              int width)

  391. {

  392.     int x, h, i;

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

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

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

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

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

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

  399.         }

  400. 

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

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

  403.     }

  404. }

  405. 

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

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

  408.                              int alpha_first, int width)

  409. {

  410.     int x, h, i;

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

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

  413. 

  414.         if (alpha_first) {

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

  416.                 *dest++ = 0xff;

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

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

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

  420.             }

  421.         } else {

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

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

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

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

  426.                 *dest++ = 0xff;

  427.             }

  428.         }

  429. 

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

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

  432.     }

  433. }

  434. 

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

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

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

  438. {

  439.     int alpha_first = 0;

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

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

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

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

  444. 

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

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

  447.                av_get_pix_fmt_name(c->srcFormat),

  448.                av_get_pix_fmt_name(c->dstFormat));

  449.         return srcSliceH;

  450.     }

  451. 

  452.     switch (c->dstFormat) {

  453.     case AV_PIX_FMT_BGR24:

  454.         gbr24ptopacked24(src102, stride102,

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

  456.                          srcSliceH, c->srcW);

  457.         break;

  458. 

  459.     case AV_PIX_FMT_RGB24:

  460.         gbr24ptopacked24(src201, stride201,

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

  462.                          srcSliceH, c->srcW);

  463.         break;

  464. 

  465.     case AV_PIX_FMT_ARGB:

  466.         alpha_first = 1;

  467.     case AV_PIX_FMT_RGBA:

  468.         gbr24ptopacked32(src201, stride201,

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

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

  471.         break;

  472. 

  473.     case AV_PIX_FMT_ABGR:

  474.         alpha_first = 1;

  475.     case AV_PIX_FMT_BGRA:

  476.         gbr24ptopacked32(src102, stride102,

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

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

  479.         break;

  480. 

  481.     default:

  482.         av_log(c, AV_LOG_ERROR,

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

  484.                av_get_pix_fmt_name(c->srcFormat),

  485.                av_get_pix_fmt_name(c->dstFormat));

  486.     }

  487. 

  488.     return srcSliceH;

  489. }

  490. 

  491. #define isRGBA32(x) (            \

  492.            (x) == AV_PIX_FMT_ARGB   \

  493.         || (x) == AV_PIX_FMT_RGBA   \

  494.         || (x) == AV_PIX_FMT_BGRA   \

  495.         || (x) == AV_PIX_FMT_ABGR   \

  496.         )

  497. 

  498. #define isRGBA64(x) (                \

  499.            (x) == AV_PIX_FMT_RGBA64LE   \

  500.         || (x) == AV_PIX_FMT_RGBA64BE   \

  501.         || (x) == AV_PIX_FMT_BGRA64LE   \

  502.         || (x) == AV_PIX_FMT_BGRA64BE   \

  503.         )

  504. 

  505. #define isRGB48(x) (                \

  506.            (x) == AV_PIX_FMT_RGB48LE   \

  507.         || (x) == AV_PIX_FMT_RGB48BE   \

  508.         || (x) == AV_PIX_FMT_BGR48LE   \

  509.         || (x) == AV_PIX_FMT_BGR48BE   \

  510.         )

  511. 

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

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

  514. static rgbConvFn findRgbConvFn(SwsContext *c)

  515. {

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

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

  518.     const int srcId = c->srcFormatBpp;

  519.     const int dstId = c->dstFormatBpp;

  520.     rgbConvFn conv = NULL;

  521. 

  522. #define IS_NOT_NE(bpp, desc) \

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

  524.      (!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))

  525. 

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

  527. 

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

  529.         if (     CONV_IS(ABGR, RGBA)

  530.               || CONV_IS(ARGB, BGRA)

  531.               || CONV_IS(BGRA, ARGB)

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

  533.         else if (CONV_IS(ABGR, ARGB)

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

  535.         else if (CONV_IS(ABGR, BGRA)

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

  537.         else if (CONV_IS(BGRA, RGBA)

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

  539.         else if (CONV_IS(BGRA, ABGR)

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

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

  542.         if      (CONV_IS(RGB48LE, BGR48LE)

  543.               || CONV_IS(BGR48LE, RGB48LE)

  544.               || CONV_IS(RGB48BE, BGR48BE)

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

  546.         else if (CONV_IS(RGB48LE, BGR48BE)

  547.               || CONV_IS(BGR48LE, RGB48BE)

  548.               || CONV_IS(RGB48BE, BGR48LE)

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

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

  551.         if      (CONV_IS(RGBA64LE, BGR48LE)

  552.               || CONV_IS(BGRA64LE, RGB48LE)

  553.               || CONV_IS(RGBA64BE, BGR48BE)

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

  555.         else if (CONV_IS(RGBA64LE, BGR48BE)

  556.               || CONV_IS(BGRA64LE, RGB48BE)

  557.               || CONV_IS(RGBA64BE, BGR48LE)

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

  559.         else if (CONV_IS(RGBA64LE, RGB48LE)

  560.               || CONV_IS(BGRA64LE, BGR48LE)

  561.               || CONV_IS(RGBA64BE, RGB48BE)

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

  563.         else if (CONV_IS(RGBA64LE, RGB48BE)

  564.               || CONV_IS(BGRA64LE, BGR48BE)

  565.               || CONV_IS(RGBA64BE, RGB48LE)

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

  567.     } else

  568.     /* BGR -> BGR */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  585.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  605.         }

  606.     }

  607. 

  608.     return conv;

  609. }

  610. 

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

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

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

  614.                            int dstStride[])

  615. 

  616. {

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

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

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

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

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

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

  623.     rgbConvFn conv = findRgbConvFn(c);

  624. 

  625.     if (!conv) {

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

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

  628.     } else {

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

  630.               uint8_t *dstPtr = dst[0];

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

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

  633. 

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

  635.             !isRGBA32(dstFormat))

  636.             srcPtr += ALT32_CORR;

  637. 

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

  639.             !isRGBA32(srcFormat))

  640.             dstPtr += ALT32_CORR;

  641. 

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

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

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

  645.                  srcSliceH * srcStride[0]);

  646.         else {

  647.             int i, j;

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

  649. 

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

  651.                 if(src_bswap) {

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

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

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

  655.                 }else

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

  657.                 if(dst_bswap)

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

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

  660.                 srcPtr += srcStride[0];

  661.                 dstPtr += dstStride[0];

  662.             }

  663.         }

  664.     }

  665.     return srcSliceH;

  666. }

  667. 

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

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

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

  671. {

  672.     rgb24toyv12(

  673.         src[0],

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

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

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

  677.         c->srcW, srcSliceH,

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

  679.     if (dst[3])

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

  681.     return srcSliceH;

  682. }

  683. 

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

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

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

  687. {

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

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

  690. 

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

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

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

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

  695.     if (dst[3])

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

  697.     return srcSliceH;

  698. }

  699. 

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

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

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

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

  704. {

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

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

  707.     else {

  708.         int i;

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

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

  711.         int length = 0;

  712. 

  713.         /* universal length finder */

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

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

  716.             length += c->srcW;

  717.         av_assert1(length != 0);

  718. 

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

  720.             memcpy(dstPtr, srcPtr, length);

  721.             srcPtr += srcStride[0];

  722.             dstPtr += dstStride[0];

  723.         }

  724.     }

  725.     return srcSliceH;

  726. }

  727. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  742.         }\

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

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

  745.         dst += dstStride;\

  746.         src += srcStride;\

  747.     }

  748. 

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

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

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

  752. {

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

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

  755.     int plane, i, j;

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

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

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

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

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

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

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

  763. 

  764.         if (!dst[plane])

  765.             continue;

  766.         // ignore palette for GRAY8

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

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

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

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

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

  772.                         isBE(c->dstFormat));

  773.             } else {

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

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

  776.             }

  777.         } else {

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

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

  780.             ) {

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

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

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

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

  785. 

  786.                 if (dst_depth == 8) {

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

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

  789.                     } else {

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

  791.                     }

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

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

  794.                         #define COPY816(w)\

  795.                         if(shiftonly){\

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

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

  798.                         }else{\

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

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

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

  802.                         }

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

  804.                             COPY816(AV_WB16)

  805.                         } else {

  806.                             COPY816(AV_WL16)

  807.                         }

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

  809.                         srcPtr  += srcStride[plane];

  810.                     }

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

  812.                     int orig_length = length;

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

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

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

  816.                            shiftonly) {

  817.                              unsigned shift = dst_depth - src_depth;

  818.                              length = orig_length;

  819. #if HAVE_FAST_64BIT

  820. #define FAST_COPY_UP(shift) \

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

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

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

  824.     } \

  825.     length &= 3;

  826. #else

  827. #define FAST_COPY_UP(shift) \

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

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

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

  831.     } \

  832.     length &= 1;

  833. #endif

  834.                              switch (shift)

  835.                              {

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

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

  838.                              }

  839.                         }

  840. #define COPY_UP(r,w) \

  841.     if(shiftonly){\

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

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

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

  845.         }\

  846.     }else{\

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

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

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

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

  851.         }\

  852.     }

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

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

  855.                                 COPY_UP(AV_RB16, AV_WB16)

  856.                             } else {

  857.                                 COPY_UP(AV_RB16, AV_WL16)

  858.                             }

  859.                         } else {

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

  861.                                 COPY_UP(AV_RL16, AV_WB16)

  862.                             } else {

  863.                                 COPY_UP(AV_RL16, AV_WL16)

  864.                             }

  865.                         }

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

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

  868.                     }

  869.                 } else {

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

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

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

  873.                         } else {

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

  875.                         }

  876.                     }else{

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

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

  879.                         } else {

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

  881.                         }

  882.                     }

  883.                 }

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

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

  886. 

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

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

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

  890.                     srcPtr += srcStride[plane];

  891.                     dstPtr += dstStride[plane];

  892.                 }

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

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

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

  896.                        height * dstStride[plane]);

  897.             } else {

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

  899.                     length *= 2;

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

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

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

  903.                     memcpy(dstPtr, srcPtr, length);

  904.                     srcPtr += srcStride[plane];

  905.                     dstPtr += dstStride[plane];

  906.                 }

  907.             }

  908.         }

  909.     }

  910.     return srcSliceH;

  911. }

  912. 

  913. 

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

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

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

  917. 

  918. 

  919. void ff_get_unscaled_swscale(SwsContext *c)

  920. {

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

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

  923.     const int flags = c->flags;

  924.     const int dstH = c->dstH;

  925.     int needsDither;

  926. 

  927.     needsDither = isAnyRGB(dstFormat) &&

  928.             c->dstFormatBpp < 24 &&

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

  930. 

  931.     /* yv12_to_nv12 */

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

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

  934.         c->swScale = planarToNv12Wrapper;

  935.     }

  936.     /* yuv2bgr */

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

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

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

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

  941.     }

  942. 

  943.     if (srcFormat == AV_PIX_FMT_YUV410P &&

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

  945.         !(flags & SWS_BITEXACT)) {

  946.         c->swScale = yvu9ToYv12Wrapper;

  947.     }

  948. 

  949.     /* bgr24toYV12 */

  950.     if (srcFormat == AV_PIX_FMT_BGR24 &&

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

  952.         !(flags & SWS_ACCURATE_RND))

  953.         c->swScale = bgr24ToYv12Wrapper;

  954. 

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

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

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

  958.         c->swScale= rgbToRgbWrapper;

  959. 

  960. #define isByteRGB(f) (\

  961.         f == AV_PIX_FMT_RGB32   ||\

  962.         f == AV_PIX_FMT_RGB32_1 ||\

  963.         f == AV_PIX_FMT_RGB24   ||\

  964.         f == AV_PIX_FMT_BGR32   ||\

  965.         f == AV_PIX_FMT_BGR32_1 ||\

  966.         f == AV_PIX_FMT_BGR24)

  967. 

  968.     if (srcFormat == AV_PIX_FMT_GBR24P && isPlanar(srcFormat) && isByteRGB(dstFormat))

  969.         c->swScale = planarRgbToRgbWrapper;

  970. 

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

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

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

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

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

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

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

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

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

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

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

  982.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))

  983.         c->swScale = packed_16bpc_bswap;

  984. 

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

  986.         c->swScale = palToRgbWrapper;

  987. 

  988.     if (srcFormat == AV_PIX_FMT_YUV422P) {

  989.         if (dstFormat == AV_PIX_FMT_YUYV422)

  990.             c->swScale = yuv422pToYuy2Wrapper;

  991.         else if (dstFormat == AV_PIX_FMT_UYVY422)

  992.             c->swScale = yuv422pToUyvyWrapper;

  993.     }

  994. 

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

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

  997.         /* yv12_to_yuy2 */

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

  999.             if (dstFormat == AV_PIX_FMT_YUYV422)

  1000.                 c->swScale = planarToYuy2Wrapper;

  1001.             else if (dstFormat == AV_PIX_FMT_UYVY422)

  1002.                 c->swScale = planarToUyvyWrapper;

  1003.         }

  1004.     }

  1005.     if (srcFormat == AV_PIX_FMT_YUYV422 &&

  1006.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1007.         c->swScale = yuyvToYuv420Wrapper;

  1008.     if (srcFormat == AV_PIX_FMT_UYVY422 &&

  1009.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1010.         c->swScale = uyvyToYuv420Wrapper;

  1011.     if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)

  1012.         c->swScale = yuyvToYuv422Wrapper;

  1013.     if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)

  1014.         c->swScale = uyvyToYuv422Wrapper;

  1015. 

  1016. #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)

  1017.     /* simple copy */

  1018.     if ( srcFormat == dstFormat ||

  1019.         (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||

  1020.         (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||

  1021.         (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||

  1022.         (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||

  1023.         (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||

  1024.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

  1025.          c->chrDstHSubSample == c->chrSrcHSubSample &&

  1026.          c->chrDstVSubSample == c->chrSrcVSubSample &&

  1027.          dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&

  1028.          srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))

  1029.     {

  1030.         if (isPacked(c->srcFormat))

  1031.             c->swScale = packedCopyWrapper;

  1032.         else /* Planar YUV or gray */

  1033.             c->swScale = planarCopyWrapper;

  1034.     }

  1035. 

  1036.     if (ARCH_BFIN)

  1037.         ff_bfin_get_unscaled_swscale(c);

  1038.     if (HAVE_ALTIVEC)

  1039.         ff_swscale_get_unscaled_altivec(c);

  1040. }

  1041. 

  1042. /* Convert the palette to the same packed 32-bit format as the palette */

  1043. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1044.                                    int num_pixels, const uint8_t *palette)

  1045. {

  1046.     int i;

  1047. 

  1048.     for (i = 0; i < num_pixels; i++)

  1049.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1050. }

  1051. 

  1052. /* Palette format: ABCD -> dst format: ABC */

  1053. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1054.                                    int num_pixels, const uint8_t *palette)

  1055. {

  1056.     int i;

  1057. 

  1058.     for (i = 0; i < num_pixels; i++) {

  1059.         //FIXME slow?

  1060.         dst[0] = palette[src[i] * 4 + 0];

  1061.         dst[1] = palette[src[i] * 4 + 1];

  1062.         dst[2] = palette[src[i] * 4 + 2];

  1063.         dst += 3;

  1064.     }

  1065. }