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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 fillPlane16(uint8_t *plane, int stride, int width, int height, int y,

  143.                       int alpha, int bits)

  144. {

  145.     int i, j;

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

  147.     int v = alpha ? -1 : (1<<bits);

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

  149.         for (j = 0; j < width; j++) {

  150.             AV_WN16(ptr+2*j, v);

  151.         }

  152.         ptr += stride;

  153.     }

  154. }

  155. 

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

  157.                       int srcSliceY, int srcSliceH, int width,

  158.                       uint8_t *dst, int dstStride)

  159. {

  160.     dst += dstStride * srcSliceY;

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

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

  163.     } else {

  164.         int i;

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

  166.             memcpy(dst, src, width);

  167.             src += srcStride;

  168.             dst += dstStride;

  169.         }

  170.     }

  171. }

  172. 

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

  174.                                int srcStride[], int srcSliceY,

  175.                                int srcSliceH, uint8_t *dstParam[],

  176.                                int dstStride[])

  177. {

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

  179. 

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

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

  182. 

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

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

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

  186.     else

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

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

  189. 

  190.     return srcSliceH;

  191. }

  192. 

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

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

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

  196. {

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

  198. 

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

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

  201. 

  202.     return srcSliceH;

  203. }

  204. 

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

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

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

  208. {

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

  210. 

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

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

  213. 

  214.     return srcSliceH;

  215. }

  216. 

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

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

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

  220. {

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

  222. 

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

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

  225. 

  226.     return srcSliceH;

  227. }

  228. 

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

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

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

  232. {

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

  234. 

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

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

  237. 

  238.     return srcSliceH;

  239. }

  240. 

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

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

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

  244. {

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

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

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

  248. 

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

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

  251. 

  252.     if (dstParam[3])

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

  254. 

  255.     return srcSliceH;

  256. }

  257. 

  258. static int yuyvToYuv422Wrapper(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;

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

  265. 

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

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

  268. 

  269.     return srcSliceH;

  270. }

  271. 

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

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

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

  275. {

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

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

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

  279. 

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

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

  282. 

  283.     if (dstParam[3])

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

  285. 

  286.     return srcSliceH;

  287. }

  288. 

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

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

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

  292. {

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

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

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

  296. 

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

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

  299. 

  300.     return srcSliceH;

  301. }

  302. 

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

  304.                              const uint8_t *palette)

  305. {

  306.     int i;

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

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

  309. }

  310. 

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

  312.                                const uint8_t *palette)

  313. {

  314.     int i;

  315. 

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

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

  318. }

  319. 

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

  321.                              const uint8_t *palette)

  322. {

  323.     int i;

  324. 

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

  326.         //FIXME slow?

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

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

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

  330.         dst += 3;

  331.     }

  332. }

  333. 

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

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

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

  337. {

  338.     int i, j;

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

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

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

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

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

  344. 

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

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

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

  348.         }

  349.         srcPtr += srcstr;

  350.         dstPtr += dststr;

  351.     }

  352. 

  353.     return srcSliceH;

  354. }

  355. 

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

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

  358.                            int dstStride[])

  359. {

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

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

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

  363.                  const uint8_t *palette) = NULL;

  364.     int i;

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

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

  367. 

  368.     if (srcFormat == AV_PIX_FMT_GRAY8A) {

  369.         switch (dstFormat) {

  370.         case AV_PIX_FMT_RGB32  : conv = gray8aToPacked32; break;

  371.         case AV_PIX_FMT_BGR32  : conv = gray8aToPacked32; break;

  372.         case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;

  373.         case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;

  374.         case AV_PIX_FMT_RGB24  : conv = gray8aToPacked24; break;

  375.         case AV_PIX_FMT_BGR24  : conv = gray8aToPacked24; break;

  376.         }

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

  378.         switch (dstFormat) {

  379.         case AV_PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;

  380.         case AV_PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;

  381.         case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;

  382.         case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;

  383.         case AV_PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;

  384.         case AV_PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;

  385.         }

  386.     }

  387. 

  388.     if (!conv)

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

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

  391.     else {

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

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

  394.             srcPtr += srcStride[0];

  395.             dstPtr += dstStride[0];

  396.         }

  397.     }

  398. 

  399.     return srcSliceH;

  400. }

  401. 

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

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

  404.                              int width)

  405. {

  406.     int x, h, i;

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

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

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

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

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

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

  413.         }

  414. 

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

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

  417.     }

  418. }

  419. 

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

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

  422.                              int alpha_first, int width)

  423. {

  424.     int x, h, i;

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

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

  427. 

  428.         if (alpha_first) {

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

  430.                 *dest++ = 0xff;

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

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

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

  434.             }

  435.         } else {

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

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

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

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

  440.                 *dest++ = 0xff;

  441.             }

  442.         }

  443. 

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

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

  446.     }

  447. }

  448. 

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

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

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

  452. {

  453.     int alpha_first = 0;

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

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

  456.                av_get_pix_fmt_name(c->srcFormat),

  457.                av_get_pix_fmt_name(c->dstFormat));

  458.         return srcSliceH;

  459.     }

  460. 

  461.     switch (c->dstFormat) {

  462.     case AV_PIX_FMT_BGR24:

  463.         gbr24ptopacked24((const uint8_t *[]) { src[1], src[0], src[2] },

  464.                          (int []) { srcStride[1], srcStride[0], srcStride[2] },

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

  466.                          srcSliceH, c->srcW);

  467.         break;

  468. 

  469.     case AV_PIX_FMT_RGB24:

  470.         gbr24ptopacked24((const uint8_t *[]) { src[2], src[0], src[1] },

  471.                          (int []) { srcStride[2], srcStride[0], srcStride[1] },

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

  473.                          srcSliceH, c->srcW);

  474.         break;

  475. 

  476.     case AV_PIX_FMT_ARGB:

  477.         alpha_first = 1;

  478.     case AV_PIX_FMT_RGBA:

  479.         gbr24ptopacked32((const uint8_t *[]) { src[2], src[0], src[1] },

  480.                          (int []) { srcStride[2], srcStride[0], srcStride[1] },

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

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

  483.         break;

  484. 

  485.     case AV_PIX_FMT_ABGR:

  486.         alpha_first = 1;

  487.     case AV_PIX_FMT_BGRA:

  488.         gbr24ptopacked32((const uint8_t *[]) { src[1], src[0], src[2] },

  489.                          (int []) { srcStride[1], srcStride[0], srcStride[2] },

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

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

  492.         break;

  493. 

  494.     default:

  495.         av_log(c, AV_LOG_ERROR,

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

  497.                av_get_pix_fmt_name(c->srcFormat),

  498.                av_get_pix_fmt_name(c->dstFormat));

  499.     }

  500. 

  501.     return srcSliceH;

  502. }

  503. 

  504. #define isRGBA32(x) (            \

  505.            (x) == AV_PIX_FMT_ARGB   \

  506.         || (x) == AV_PIX_FMT_RGBA   \

  507.         || (x) == AV_PIX_FMT_BGRA   \

  508.         || (x) == AV_PIX_FMT_ABGR   \

  509.         )

  510. 

  511. #define isRGBA64(x) (                \

  512.            (x) == AV_PIX_FMT_RGBA64LE   \

  513.         || (x) == AV_PIX_FMT_RGBA64BE   \

  514.         || (x) == AV_PIX_FMT_BGRA64LE   \

  515.         || (x) == AV_PIX_FMT_BGRA64BE   \

  516.         )

  517. 

  518. #define isRGB48(x) (                \

  519.            (x) == AV_PIX_FMT_RGB48LE   \

  520.         || (x) == AV_PIX_FMT_RGB48BE   \

  521.         || (x) == AV_PIX_FMT_BGR48LE   \

  522.         || (x) == AV_PIX_FMT_BGR48BE   \

  523.         )

  524. 

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

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

  527. static rgbConvFn findRgbConvFn(SwsContext *c)

  528. {

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

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

  531.     const int srcId = c->srcFormatBpp;

  532.     const int dstId = c->dstFormatBpp;

  533.     rgbConvFn conv = NULL;

  534.     const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(srcFormat);

  535.     const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(dstFormat);

  536. 

  537. #define IS_NOT_NE(bpp, desc) \

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

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

  540. 

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

  542. 

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

  544.         if (     CONV_IS(ABGR, RGBA)

  545.               || CONV_IS(ARGB, BGRA)

  546.               || CONV_IS(BGRA, ARGB)

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

  548.         else if (CONV_IS(ABGR, ARGB)

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

  550.         else if (CONV_IS(ABGR, BGRA)

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

  552.         else if (CONV_IS(BGRA, RGBA)

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

  554.         else if (CONV_IS(BGRA, ABGR)

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

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

  557.         if      (CONV_IS(RGB48LE, BGR48LE)

  558.               || CONV_IS(BGR48LE, RGB48LE)

  559.               || CONV_IS(RGB48BE, BGR48BE)

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

  561.         else if (CONV_IS(RGB48LE, BGR48BE)

  562.               || CONV_IS(BGR48LE, RGB48BE)

  563.               || CONV_IS(RGB48BE, BGR48LE)

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

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

  566.         if      (CONV_IS(RGBA64LE, BGR48LE)

  567.               || CONV_IS(BGRA64LE, RGB48LE)

  568.               || CONV_IS(RGBA64BE, BGR48BE)

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

  570.         else if (CONV_IS(RGBA64LE, BGR48BE)

  571.               || CONV_IS(BGRA64LE, RGB48BE)

  572.               || CONV_IS(RGBA64BE, BGR48LE)

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

  574.         else if (CONV_IS(RGBA64LE, RGB48LE)

  575.               || CONV_IS(BGRA64LE, BGR48LE)

  576.               || CONV_IS(RGBA64BE, RGB48BE)

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

  578.         else if (CONV_IS(RGBA64LE, RGB48BE)

  579.               || CONV_IS(BGRA64LE, BGR48BE)

  580.               || CONV_IS(RGBA64BE, RGB48LE)

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

  582.     } else

  583.     /* BGR -> BGR */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  600.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  620.         }

  621.     }

  622. 

  623.     return conv;

  624. }

  625. 

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

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

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

  629.                            int dstStride[])

  630. 

  631. {

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

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

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

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

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

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

  638.     rgbConvFn conv = findRgbConvFn(c);

  639. 

  640.     if (!conv) {

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

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

  643.     } else {

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

  645.               uint8_t *dstPtr = dst[0];

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

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

  648. 

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

  650.             !isRGBA32(dstFormat))

  651.             srcPtr += ALT32_CORR;

  652. 

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

  654.             !isRGBA32(srcFormat))

  655.             dstPtr += ALT32_CORR;

  656. 

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

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

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

  660.                  srcSliceH * srcStride[0]);

  661.         else {

  662.             int i, j;

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

  664. 

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

  666.                 if(src_bswap) {

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

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

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

  670.                 }else

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

  672.                 if(dst_bswap)

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

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

  675.                 srcPtr += srcStride[0];

  676.                 dstPtr += dstStride[0];

  677.             }

  678.         }

  679.     }

  680.     return srcSliceH;

  681. }

  682. 

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

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

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

  686. {

  687.     rgb24toyv12(

  688.         src[0],

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

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

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

  692.         c->srcW, srcSliceH,

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

  694.     if (dst[3])

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

  696.     return srcSliceH;

  697. }

  698. 

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

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

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

  702. {

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

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

  705. 

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

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

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

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

  710.     if (dst[3])

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

  712.     return srcSliceH;

  713. }

  714. 

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

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

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

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

  719. {

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

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

  722.     else {

  723.         int i;

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

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

  726.         int length = 0;

  727. 

  728.         /* universal length finder */

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

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

  731.             length += c->srcW;

  732.         av_assert1(length != 0);

  733. 

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

  735.             memcpy(dstPtr, srcPtr, length);

  736.             srcPtr += srcStride[0];

  737.             dstPtr += dstStride[0];

  738.         }

  739.     }

  740.     return srcSliceH;

  741. }

  742. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  757.         }\

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

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

  760.         dst += dstStride;\

  761.         src += srcStride;\

  762.     }

  763. 

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

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

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

  767. {

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

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

  770.     int plane, i, j;

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

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

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

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

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

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

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

  778. 

  779.         if (!dst[plane])

  780.             continue;

  781.         // ignore palette for GRAY8

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

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

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

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

  786.                         plane == 3, desc_dst->comp[plane].depth_minus1);

  787.             } else {

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

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

  790.             }

  791.         } else {

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

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

  794.             ) {

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

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

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

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

  799. 

  800.                 if (dst_depth == 8) {

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

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

  803.                     } else {

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

  805.                     }

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

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

  808.                         #define COPY816(w)\

  809.                         if(shiftonly){\

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

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

  812.                         }else{\

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

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

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

  816.                         }

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

  818.                             COPY816(AV_WB16)

  819.                         } else {

  820.                             COPY816(AV_WL16)

  821.                         }

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

  823.                         srcPtr  += srcStride[plane];

  824.                     }

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

  826.                     int orig_length = length;

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

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

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

  830.                            shiftonly) {

  831.                              unsigned shift = dst_depth - src_depth;

  832.                              length = orig_length;

  833. #if HAVE_FAST_64BIT

  834. #define FAST_COPY_UP(shift) \

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

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

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

  838.     } \

  839.     length &= 3;

  840. #else

  841. #define FAST_COPY_UP(shift) \

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

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

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

  845.     } \

  846.     length &= 1;

  847. #endif

  848.                              switch (shift)

  849.                              {

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

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

  852.                              }

  853.                         }

  854. #define COPY_UP(r,w) \

  855.     if(shiftonly){\

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

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

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

  859.         }\

  860.     }else{\

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

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

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

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

  865.         }\

  866.     }

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

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

  869.                                 COPY_UP(AV_RB16, AV_WB16)

  870.                             } else {

  871.                                 COPY_UP(AV_RB16, AV_WL16)

  872.                             }

  873.                         } else {

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

  875.                                 COPY_UP(AV_RL16, AV_WB16)

  876.                             } else {

  877.                                 COPY_UP(AV_RL16, AV_WL16)

  878.                             }

  879.                         }

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

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

  882.                     }

  883.                 } else {

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

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

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

  887.                         } else {

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

  889.                         }

  890.                     }else{

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

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

  893.                         } else {

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

  895.                         }

  896.                     }

  897.                 }

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

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

  900. 

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

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

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

  904.                     srcPtr += srcStride[plane];

  905.                     dstPtr += dstStride[plane];

  906.                 }

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

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

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

  910.                        height * dstStride[plane]);

  911.             } else {

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

  913.                     length *= 2;

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

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

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

  917.                     memcpy(dstPtr, srcPtr, length);

  918.                     srcPtr += srcStride[plane];

  919.                     dstPtr += dstStride[plane];

  920.                 }

  921.             }

  922.         }

  923.     }

  924.     return srcSliceH;

  925. }

  926. 

  927. 

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

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

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

  931. 

  932. 

  933. void ff_get_unscaled_swscale(SwsContext *c)

  934. {

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

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

  937.     const int flags = c->flags;

  938.     const int dstH = c->dstH;

  939.     int needsDither;

  940. 

  941.     needsDither = isAnyRGB(dstFormat) &&

  942.             c->dstFormatBpp < 24 &&

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

  944. 

  945.     /* yv12_to_nv12 */

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

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

  948.         c->swScale = planarToNv12Wrapper;

  949.     }

  950.     /* yuv2bgr */

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

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

  953.         !(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {

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

  955.     }

  956. 

  957.     if (srcFormat == AV_PIX_FMT_YUV410P &&

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

  959.         !(flags & SWS_BITEXACT)) {

  960.         c->swScale = yvu9ToYv12Wrapper;

  961.     }

  962. 

  963.     /* bgr24toYV12 */

  964.     if (srcFormat == AV_PIX_FMT_BGR24 &&

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

  966.         !(flags & SWS_ACCURATE_RND))

  967.         c->swScale = bgr24ToYv12Wrapper;

  968. 

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

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

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

  972.         c->swScale= rgbToRgbWrapper;

  973. 

  974. #define isByteRGB(f) (\

  975.         f == AV_PIX_FMT_RGB32   ||\

  976.         f == AV_PIX_FMT_RGB32_1 ||\

  977.         f == AV_PIX_FMT_RGB24   ||\

  978.         f == AV_PIX_FMT_BGR32   ||\

  979.         f == AV_PIX_FMT_BGR32_1 ||\

  980.         f == AV_PIX_FMT_BGR24)

  981. 

  982.     if (isAnyRGB(srcFormat) && isPlanar(srcFormat) && isByteRGB(dstFormat))

  983.         c->swScale = planarRgbToRgbWrapper;

  984. 

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

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

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

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

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

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

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

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

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

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

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

  996.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))

  997.         c->swScale = packed_16bpc_bswap;

  998. 

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

  1000.         c->swScale = palToRgbWrapper;

  1001. 

  1002.     if (srcFormat == AV_PIX_FMT_YUV422P) {

  1003.         if (dstFormat == AV_PIX_FMT_YUYV422)

  1004.             c->swScale = yuv422pToYuy2Wrapper;

  1005.         else if (dstFormat == AV_PIX_FMT_UYVY422)

  1006.             c->swScale = yuv422pToUyvyWrapper;

  1007.     }

  1008. 

  1009.     /* LQ converters if -sws 0 or -sws 4*/

  1010.     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  1011.         /* yv12_to_yuy2 */

  1012.         if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {

  1013.             if (dstFormat == AV_PIX_FMT_YUYV422)

  1014.                 c->swScale = planarToYuy2Wrapper;

  1015.             else if (dstFormat == AV_PIX_FMT_UYVY422)

  1016.                 c->swScale = planarToUyvyWrapper;

  1017.         }

  1018.     }

  1019.     if (srcFormat == AV_PIX_FMT_YUYV422 &&

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

  1021.         c->swScale = yuyvToYuv420Wrapper;

  1022.     if (srcFormat == AV_PIX_FMT_UYVY422 &&

  1023.        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))

  1024.         c->swScale = uyvyToYuv420Wrapper;

  1025.     if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)

  1026.         c->swScale = yuyvToYuv422Wrapper;

  1027.     if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)

  1028.         c->swScale = uyvyToYuv422Wrapper;

  1029. 

  1030. #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)

  1031.     /* simple copy */

  1032.     if ( srcFormat == dstFormat ||

  1033.         (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||

  1034.         (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||

  1035.         (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||

  1036.         (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||

  1037.         (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||

  1038.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

  1039.          c->chrDstHSubSample == c->chrSrcHSubSample &&

  1040.          c->chrDstVSubSample == c->chrSrcVSubSample &&

  1041.          dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&

  1042.          srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))

  1043.     {

  1044.         if (isPacked(c->srcFormat))

  1045.             c->swScale = packedCopyWrapper;

  1046.         else /* Planar YUV or gray */

  1047.             c->swScale = planarCopyWrapper;

  1048.     }

  1049. 

  1050.     if (ARCH_BFIN)

  1051.         ff_bfin_get_unscaled_swscale(c);

  1052.     if (HAVE_ALTIVEC)

  1053.         ff_swscale_get_unscaled_altivec(c);

  1054. }

  1055. 

  1056. /* Convert the palette to the same packed 32-bit format as the palette */

  1057. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1058.                                    int num_pixels, const uint8_t *palette)

  1059. {

  1060.     int i;

  1061. 

  1062.     for (i = 0; i < num_pixels; i++)

  1063.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1064. }

  1065. 

  1066. /* Palette format: ABCD -> dst format: ABC */

  1067. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1068.                                    int num_pixels, const uint8_t *palette)

  1069. {

  1070.     int i;

  1071. 

  1072.     for (i = 0; i < num_pixels; i++) {

  1073.         //FIXME slow?

  1074.         dst[0] = palette[src[i] * 4 + 0];

  1075.         dst[1] = palette[src[i] * 4 + 1];

  1076.         dst[2] = palette[src[i] * 4 + 2];

  1077.         dst += 3;

  1078.     }

  1079. }