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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 <assert.h>

  27. #include "swscale.h"

  28. #include "swscale_internal.h"

  29. #include "rgb2rgb.h"

  30. #include "libavutil/intreadwrite.h"

  31. #include "libavutil/cpu.h"

  32. #include "libavutil/avutil.h"

  33. #include "libavutil/mathematics.h"

  34. #include "libavutil/bswap.h"

  35. #include "libavutil/pixdesc.h"

  36. 

  37. #define RGB2YUV_SHIFT 15

  38. #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  39. #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  40. #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  41. #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  42. #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  43. #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  44. #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  45. #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  46. #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

  47. 

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

  49. {

  50.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  51.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  52.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  53.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  54.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  55.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  56.   {   0,  1,  0,  1,  0,  1,  0,  1,},

  57.   {   1,  0,  1,  0,  1,  0,  1,  0,},

  58. },{

  59.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  60.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  61.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  62.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  63.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  64.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  65.   {   1,  2,  1,  2,  1,  2,  1,  2,},

  66.   {   3,  0,  3,  0,  3,  0,  3,  0,},

  67. },{

  68.   {   2,  4,  3,  5,  2,  4,  3,  5,},

  69.   {   6,  0,  7,  1,  6,  0,  7,  1,},

  70.   {   3,  5,  2,  4,  3,  5,  2,  4,},

  71.   {   7,  1,  6,  0,  7,  1,  6,  0,},

  72.   {   2,  4,  3,  5,  2,  4,  3,  5,},

  73.   {   6,  0,  7,  1,  6,  0,  7,  1,},

  74.   {   3,  5,  2,  4,  3,  5,  2,  4,},

  75.   {   7,  1,  6,  0,  7,  1,  6,  0,},

  76. },{

  77.   {   4,  8,  7, 11,  4,  8,  7, 11,},

  78.   {  12,  0, 15,  3, 12,  0, 15,  3,},

  79.   {   6, 10,  5,  9,  6, 10,  5,  9,},

  80.   {  14,  2, 13,  1, 14,  2, 13,  1,},

  81.   {   4,  8,  7, 11,  4,  8,  7, 11,},

  82.   {  12,  0, 15,  3, 12,  0, 15,  3,},

  83.   {   6, 10,  5,  9,  6, 10,  5,  9,},

  84.   {  14,  2, 13,  1, 14,  2, 13,  1,},

  85. },{

  86.   {   9, 17, 15, 23,  8, 16, 14, 22,},

  87.   {  25,  1, 31,  7, 24,  0, 30,  6,},

  88.   {  13, 21, 11, 19, 12, 20, 10, 18,},

  89.   {  29,  5, 27,  3, 28,  4, 26,  2,},

  90.   {   8, 16, 14, 22,  9, 17, 15, 23,},

  91.   {  24,  0, 30,  6, 25,  1, 31,  7,},

  92.   {  12, 20, 10, 18, 13, 21, 11, 19,},

  93.   {  28,  4, 26,  2, 29,  5, 27,  3,},

  94. },{

  95.   {  18, 34, 30, 46, 17, 33, 29, 45,},

  96.   {  50,  2, 62, 14, 49,  1, 61, 13,},

  97.   {  26, 42, 22, 38, 25, 41, 21, 37,},

  98.   {  58, 10, 54,  6, 57,  9, 53,  5,},

  99.   {  16, 32, 28, 44, 19, 35, 31, 47,},

  100.   {  48,  0, 60, 12, 51,  3, 63, 15,},

  101.   {  24, 40, 20, 36, 27, 43, 23, 39,},

  102.   {  56,  8, 52,  4, 59, 11, 55,  7,},

  103. },{

  104.   {  18, 34, 30, 46, 17, 33, 29, 45,},

  105.   {  50,  2, 62, 14, 49,  1, 61, 13,},

  106.   {  26, 42, 22, 38, 25, 41, 21, 37,},

  107.   {  58, 10, 54,  6, 57,  9, 53,  5,},

  108.   {  16, 32, 28, 44, 19, 35, 31, 47,},

  109.   {  48,  0, 60, 12, 51,  3, 63, 15,},

  110.   {  24, 40, 20, 36, 27, 43, 23, 39,},

  111.   {  56,  8, 52,  4, 59, 11, 55,  7,},

  112. },{

  113.   {  36, 68, 60, 92, 34, 66, 58, 90,},

  114.   { 100,  4,124, 28, 98,  2,122, 26,},

  115.   {  52, 84, 44, 76, 50, 82, 42, 74,},

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

  117.   {  32, 64, 56, 88, 38, 70, 62, 94,},

  118.   {  96,  0,120, 24,102,  6,126, 30,},

  119.   {  48, 80, 40, 72, 54, 86, 46, 78,},

  120.   { 112, 16,104,  8,118, 22,110, 14,},

  121. }};

  122. 

  123. static const uint8_t flat64[8]={64,64,64,64,64,64,64,64};

  124. 

  125. const uint16_t dither_scale[15][16]={

  126. {    2,    3,    3,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,},

  127. {    2,    3,    7,    7,   13,   13,   25,   25,   25,   25,   25,   25,   25,   25,   25,   25,},

  128. {    3,    3,    4,   15,   15,   29,   57,   57,   57,  113,  113,  113,  113,  113,  113,  113,},

  129. {    3,    4,    4,    5,   31,   31,   61,  121,  241,  241,  241,  241,  481,  481,  481,  481,},

  130. {    3,    4,    5,    5,    6,   63,   63,  125,  249,  497,  993,  993,  993,  993,  993, 1985,},

  131. {    3,    5,    6,    6,    6,    7,  127,  127,  253,  505, 1009, 2017, 4033, 4033, 4033, 4033,},

  132. {    3,    5,    6,    7,    7,    7,    8,  255,  255,  509, 1017, 2033, 4065, 8129,16257,16257,},

  133. {    3,    5,    6,    8,    8,    8,    8,    9,  511,  511, 1021, 2041, 4081, 8161,16321,32641,},

  134. {    3,    5,    7,    8,    9,    9,    9,    9,   10, 1023, 1023, 2045, 4089, 8177,16353,32705,},

  135. {    3,    5,    7,    8,   10,   10,   10,   10,   10,   11, 2047, 2047, 4093, 8185,16369,32737,},

  136. {    3,    5,    7,    8,   10,   11,   11,   11,   11,   11,   12, 4095, 4095, 8189,16377,32753,},

  137. {    3,    5,    7,    9,   10,   12,   12,   12,   12,   12,   12,   13, 8191, 8191,16381,32761,},

  138. {    3,    5,    7,    9,   10,   12,   13,   13,   13,   13,   13,   13,   14,16383,16383,32765,},

  139. {    3,    5,    7,    9,   10,   12,   14,   14,   14,   14,   14,   14,   14,   15,32767,32767,},

  140. {    3,    5,    7,    9,   11,   12,   14,   15,   15,   15,   15,   15,   15,   15,   16,65535,},

  141. };

  142. 

  143. 

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

  145.                       uint8_t val)

  146. {

  147.     int i;

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

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

  150.         memset(ptr, val, width);

  151.         ptr += stride;

  152.     }

  153. }

  154. 

  155. static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y,

  156.                       int alpha, int bits)

  157. {

  158.     int i, j;

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

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

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

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

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

  164.         }

  165.         ptr += stride;

  166.     }

  167. }

  168. 

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

  170.                       int srcSliceY, int srcSliceH, int width,

  171.                       uint8_t *dst, int dstStride)

  172. {

  173.     dst += dstStride * srcSliceY;

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

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

  176.     } else {

  177.         int i;

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

  179.             memcpy(dst, src, width);

  180.             src += srcStride;

  181.             dst += dstStride;

  182.         }

  183.     }

  184. }

  185. 

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

  187.                                int srcStride[], int srcSliceY,

  188.                                int srcSliceH, uint8_t *dstParam[],

  189.                                int dstStride[])

  190. {

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

  192. 

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

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

  195. 

  196.     if (c->dstFormat == PIX_FMT_NV12)

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

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

  199.     else

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

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

  202. 

  203.     return srcSliceH;

  204. }

  205. 

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

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

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

  209. {

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

  211. 

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

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

  214. 

  215.     return srcSliceH;

  216. }

  217. 

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

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

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

  221. {

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

  223. 

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

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

  226. 

  227.     return srcSliceH;

  228. }

  229. 

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

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

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

  233. {

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

  235. 

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

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

  238. 

  239.     return srcSliceH;

  240. }

  241. 

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

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

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

  245. {

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

  247. 

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

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

  250. 

  251.     return srcSliceH;

  252. }

  253. 

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

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

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

  257. {

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

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

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

  261. 

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

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

  264. 

  265.     if (dstParam[3])

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

  267. 

  268.     return srcSliceH;

  269. }

  270. 

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

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

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

  274. {

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

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

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

  278. 

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

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

  281. 

  282.     return srcSliceH;

  283. }

  284. 

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

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

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

  288. {

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

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

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

  292. 

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

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

  295. 

  296.     if (dstParam[3])

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

  298. 

  299.     return srcSliceH;

  300. }

  301. 

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

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

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

  305. {

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

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

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

  309. 

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

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

  312. 

  313.     return srcSliceH;

  314. }

  315. 

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

  317.                              const uint8_t *palette)

  318. {

  319.     int i;

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

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

  322. }

  323. 

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

  325.                                const uint8_t *palette)

  326. {

  327.     int i;

  328. 

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

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

  331. }

  332. 

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

  334.                              const uint8_t *palette)

  335. {

  336.     int i;

  337. 

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

  339.         //FIXME slow?

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

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

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

  343.         dst += 3;

  344.     }

  345. }

  346. 

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

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

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

  350. {

  351.     int i, j;

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

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

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

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

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

  357. 

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

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

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

  361.         }

  362.         srcPtr += srcstr;

  363.         dstPtr += dststr;

  364.     }

  365. 

  366.     return srcSliceH;

  367. }

  368. 

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

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

  371.                            int dstStride[])

  372. {

  373.     const enum PixelFormat srcFormat = c->srcFormat;

  374.     const enum PixelFormat dstFormat = c->dstFormat;

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

  376.                  const uint8_t *palette) = NULL;

  377.     int i;

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

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

  380. 

  381.     if (srcFormat == PIX_FMT_GRAY8A) {

  382.         switch (dstFormat) {

  383.         case PIX_FMT_RGB32  : conv = gray8aToPacked32; break;

  384.         case PIX_FMT_BGR32  : conv = gray8aToPacked32; break;

  385.         case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;

  386.         case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;

  387.         case PIX_FMT_RGB24  : conv = gray8aToPacked24; break;

  388.         case PIX_FMT_BGR24  : conv = gray8aToPacked24; break;

  389.         }

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

  391.         switch (dstFormat) {

  392.         case PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;

  393.         case PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;

  394.         case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;

  395.         case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;

  396.         case PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;

  397.         case PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;

  398.         }

  399.     }

  400. 

  401.     if (!conv)

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

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

  404.     else {

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

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

  407.             srcPtr += srcStride[0];

  408.             dstPtr += dstStride[0];

  409.         }

  410.     }

  411. 

  412.     return srcSliceH;

  413. }

  414. 

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

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

  417.                              int width)

  418. {

  419.     int x, h, i;

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

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

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

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

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

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

  426.         }

  427. 

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

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

  430.     }

  431. }

  432. 

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

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

  435.                              int alpha_first, int width)

  436. {

  437.     int x, h, i;

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

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

  440. 

  441.         if (alpha_first) {

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

  443.                 *dest++ = 0xff;

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

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

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

  447.             }

  448.         } else {

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

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

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

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

  453.                 *dest++ = 0xff;

  454.             }

  455.         }

  456. 

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

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

  459.     }

  460. }

  461. 

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

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

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

  465. {

  466.     int alpha_first = 0;

  467.     if (c->srcFormat != PIX_FMT_GBRP) {

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

  469.                av_get_pix_fmt_name(c->srcFormat),

  470.                av_get_pix_fmt_name(c->dstFormat));

  471.         return srcSliceH;

  472.     }

  473. 

  474.     switch (c->dstFormat) {

  475.     case PIX_FMT_BGR24:

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

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

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

  479.                          srcSliceH, c->srcW);

  480.         break;

  481. 

  482.     case PIX_FMT_RGB24:

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

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

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

  486.                          srcSliceH, c->srcW);

  487.         break;

  488. 

  489.     case PIX_FMT_ARGB:

  490.         alpha_first = 1;

  491.     case PIX_FMT_RGBA:

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

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

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

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

  496.         break;

  497. 

  498.     case PIX_FMT_ABGR:

  499.         alpha_first = 1;

  500.     case PIX_FMT_BGRA:

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

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

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

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

  505.         break;

  506. 

  507.     default:

  508.         av_log(c, AV_LOG_ERROR,

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

  510.                av_get_pix_fmt_name(c->srcFormat),

  511.                av_get_pix_fmt_name(c->dstFormat));

  512.     }

  513. 

  514.     return srcSliceH;

  515. }

  516. 

  517. #define isRGBA32(x) (            \

  518.            (x) == PIX_FMT_ARGB   \

  519.         || (x) == PIX_FMT_RGBA   \

  520.         || (x) == PIX_FMT_BGRA   \

  521.         || (x) == PIX_FMT_ABGR   \

  522.         )

  523. 

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

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

  526. static rgbConvFn findRgbConvFn(SwsContext *c)

  527. {

  528.     const enum PixelFormat srcFormat = c->srcFormat;

  529.     const enum PixelFormat dstFormat = c->dstFormat;

  530.     const int srcId = c->srcFormatBpp;

  531.     const int dstId = c->dstFormatBpp;

  532.     rgbConvFn conv = NULL;

  533. 

  534. #define IS_NOT_NE(bpp, fmt) \

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

  536.      (!(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))

  537. 

  538.     /* if this is non-native rgb444/555/565, don't handle it here. */

  539.     if (IS_NOT_NE(srcId, srcFormat) || IS_NOT_NE(dstId, dstFormat))

  540.         return NULL;

  541. 

  542. #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)

  543. 

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

  545.         if (     CONV_IS(ABGR, RGBA)

  546.               || CONV_IS(ARGB, BGRA)

  547.               || CONV_IS(BGRA, ARGB)

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

  549.         else if (CONV_IS(ABGR, ARGB)

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

  551.         else if (CONV_IS(ABGR, BGRA)

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

  553.         else if (CONV_IS(BGRA, RGBA)

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

  555.         else if (CONV_IS(BGRA, ABGR)

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

  557.     } else

  558.     /* BGR -> BGR */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  575.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  595.         }

  596.     }

  597. 

  598.     return conv;

  599. }

  600. 

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

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

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

  604.                            int dstStride[])

  605. 

  606. {

  607.     const enum PixelFormat srcFormat = c->srcFormat;

  608.     const enum PixelFormat dstFormat = c->dstFormat;

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

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

  611.     rgbConvFn conv = findRgbConvFn(c);

  612. 

  613.     if (!conv) {

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

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

  616.     } else {

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

  618.               uint8_t *dstPtr = dst[0];

  619.         if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) &&

  620.             !isRGBA32(dstFormat))

  621.             srcPtr += ALT32_CORR;

  622. 

  623.         if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) &&

  624.             !isRGBA32(srcFormat))

  625.             dstPtr += ALT32_CORR;

  626. 

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

  628.             !(srcStride[0] % srcBpp))

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

  630.                  srcSliceH * srcStride[0]);

  631.         else {

  632.             int i;

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

  634. 

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

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

  637.                 srcPtr += srcStride[0];

  638.                 dstPtr += dstStride[0];

  639.             }

  640.         }

  641.     }

  642.     return srcSliceH;

  643. }

  644. 

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

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

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

  648. {

  649.     rgb24toyv12(

  650.         src[0],

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

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

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

  654.         c->srcW, srcSliceH,

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

  656.     if (dst[3])

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

  658.     return srcSliceH;

  659. }

  660. 

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

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

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

  664. {

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

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

  667. 

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

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

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

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

  672.     if (dst[3])

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

  674.     return srcSliceH;

  675. }

  676. 

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

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

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

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

  681. {

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

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

  684.     else {

  685.         int i;

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

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

  688.         int length = 0;

  689. 

  690.         /* universal length finder */

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

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

  693.             length += c->srcW;

  694.         assert(length != 0);

  695. 

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

  697.             memcpy(dstPtr, srcPtr, length);

  698.             srcPtr += srcStride[0];

  699.             dstPtr += dstStride[0];

  700.         }

  701.     }

  702.     return srcSliceH;

  703. }

  704. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  719.         }\

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

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

  722.         dst += dstStride;\

  723.         src += srcStride;\

  724.     }

  725. 

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

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

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

  729. {

  730.     int plane, i, j;

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

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

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

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

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

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

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

  738. 

  739.         if (!dst[plane])

  740.             continue;

  741.         // ignore palette for GRAY8

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

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

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

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

  746.                         plane == 3, av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1);

  747.             } else {

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

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

  750.             }

  751.         } else {

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

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

  754.             ) {

  755.                 const int src_depth = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1 + 1;

  756.                 const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1 + 1;

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

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

  759. 

  760.                 if (dst_depth == 8) {

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

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

  763.                     } else {

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

  765.                     }

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

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

  768.                         #define COPY816(w)\

  769.                         if(shiftonly){\

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

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

  772.                         }else{\

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

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

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

  776.                         }

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

  778.                             COPY816(AV_WB16)

  779.                         } else {

  780.                             COPY816(AV_WL16)

  781.                         }

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

  783.                         srcPtr  += srcStride[plane];

  784.                     }

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

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

  787. #define COPY_UP(r,w) \

  788.     if(shiftonly){\

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

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

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

  792.         }\

  793.     }else{\

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

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

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

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

  798.         }\

  799.     }

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

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

  802.                                 COPY_UP(AV_RB16, AV_WB16)

  803.                             } else {

  804.                                 COPY_UP(AV_RB16, AV_WL16)

  805.                             }

  806.                         } else {

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

  808.                                 COPY_UP(AV_RL16, AV_WB16)

  809.                             } else {

  810.                                 COPY_UP(AV_RL16, AV_WL16)

  811.                             }

  812.                         }

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

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

  815.                     }

  816.                 } else {

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

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

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

  820.                         } else {

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

  822.                         }

  823.                     }else{

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

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

  826.                         } else {

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

  828.                         }

  829.                     }

  830.                 }

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

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

  833. 

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

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

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

  837.                     srcPtr += srcStride[plane];

  838.                     dstPtr += dstStride[plane];

  839.                 }

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

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

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

  843.                        height * dstStride[plane]);

  844.             } else {

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

  846.                     length *= 2;

  847.                 else if (!av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1)

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

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

  850.                     memcpy(dstPtr, srcPtr, length);

  851.                     srcPtr += srcStride[plane];

  852.                     dstPtr += dstStride[plane];

  853.                 }

  854.             }

  855.         }

  856.     }

  857.     return srcSliceH;

  858. }

  859. 

  860. 

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

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

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

  864. 

  865. 

  866. void ff_get_unscaled_swscale(SwsContext *c)

  867. {

  868.     const enum PixelFormat srcFormat = c->srcFormat;

  869.     const enum PixelFormat dstFormat = c->dstFormat;

  870.     const int flags = c->flags;

  871.     const int dstH = c->dstH;

  872.     int needsDither;

  873. 

  874.     needsDither = isAnyRGB(dstFormat) &&

  875.             c->dstFormatBpp < 24 &&

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

  877. 

  878.     /* yv12_to_nv12 */

  879.     if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) &&

  880.         (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {

  881.         c->swScale = planarToNv12Wrapper;

  882.     }

  883.     /* yuv2bgr */

  884.     if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUV422P ||

  885.          srcFormat == PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&

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

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

  888.     }

  889. 

  890.     if (srcFormat == PIX_FMT_YUV410P &&

  891.         (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&

  892.         !(flags & SWS_BITEXACT)) {

  893.         c->swScale = yvu9ToYv12Wrapper;

  894.     }

  895. 

  896.     /* bgr24toYV12 */

  897.     if (srcFormat == PIX_FMT_BGR24 &&

  898.         (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&

  899.         !(flags & SWS_ACCURATE_RND))

  900.         c->swScale = bgr24ToYv12Wrapper;

  901. 

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

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

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

  905.         c->swScale= rgbToRgbWrapper;

  906. 

  907. #define isByteRGB(f) (\

  908.         f == PIX_FMT_RGB32   ||\

  909.         f == PIX_FMT_RGB32_1 ||\

  910.         f == PIX_FMT_RGB24   ||\

  911.         f == PIX_FMT_BGR32   ||\

  912.         f == PIX_FMT_BGR32_1 ||\

  913.         f == PIX_FMT_BGR24)

  914. 

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

  916.         c->swScale = planarRgbToRgbWrapper;

  917. 

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

  919.     if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR444) ||

  920.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR48)  ||

  921.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR555) ||

  922.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR565) ||

  923.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_GRAY16) ||

  924.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB444) ||

  925.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB48)  ||

  926.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB555) ||

  927.         IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB565))

  928.         c->swScale = packed_16bpc_bswap;

  929. 

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

  931.         c->swScale = palToRgbWrapper;

  932. 

  933.     if (srcFormat == PIX_FMT_YUV422P) {

  934.         if (dstFormat == PIX_FMT_YUYV422)

  935.             c->swScale = yuv422pToYuy2Wrapper;

  936.         else if (dstFormat == PIX_FMT_UYVY422)

  937.             c->swScale = yuv422pToUyvyWrapper;

  938.     }

  939. 

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

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

  942.         /* yv12_to_yuy2 */

  943.         if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {

  944.             if (dstFormat == PIX_FMT_YUYV422)

  945.                 c->swScale = planarToYuy2Wrapper;

  946.             else if (dstFormat == PIX_FMT_UYVY422)

  947.                 c->swScale = planarToUyvyWrapper;

  948.         }

  949.     }

  950.     if (srcFormat == PIX_FMT_YUYV422 &&

  951.        (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  952.         c->swScale = yuyvToYuv420Wrapper;

  953.     if (srcFormat == PIX_FMT_UYVY422 &&

  954.        (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  955.         c->swScale = uyvyToYuv420Wrapper;

  956.     if (srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)

  957.         c->swScale = yuyvToYuv422Wrapper;

  958.     if (srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)

  959.         c->swScale = uyvyToYuv422Wrapper;

  960. 

  961. #define isPlanarGray(x) (isGray(x) && (x) != PIX_FMT_GRAY8A)

  962.     /* simple copy */

  963.     if ( srcFormat == dstFormat ||

  964.         (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P) ||

  965.         (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P) ||

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

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

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

  969.         (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&

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

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

  972.          dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21 &&

  973.          srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))

  974.     {

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

  976.             c->swScale = packedCopyWrapper;

  977.         else /* Planar YUV or gray */

  978.             c->swScale = planarCopyWrapper;

  979.     }

  980. 

  981.     if (ARCH_BFIN)

  982.         ff_bfin_get_unscaled_swscale(c);

  983.     if (HAVE_ALTIVEC)

  984.         ff_swscale_get_unscaled_altivec(c);

  985. }

  986. 

  987. static void reset_ptr(const uint8_t *src[], int format)

  988. {

  989.     if (!isALPHA(format))

  990.         src[3] = NULL;

  991.     if (!isPlanar(format)) {

  992.         src[3] = src[2] = NULL;

  993. 

  994.         if (!usePal(format))

  995.             src[1] = NULL;

  996.     }

  997. }

  998. 

  999. static int check_image_pointers(const uint8_t * const data[4], enum PixelFormat pix_fmt,

  1000.                                 const int linesizes[4])

  1001. {

  1002.     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];

  1003.     int i;

  1004. 

  1005.     for (i = 0; i < 4; i++) {

  1006.         int plane = desc->comp[i].plane;

  1007.         if (!data[plane] || !linesizes[plane])

  1008.             return 0;

  1009.     }

  1010. 

  1011.     return 1;

  1012. }

  1013. 

  1014. /**

  1015.  * swscale wrapper, so we don't need to export the SwsContext.

  1016.  * Assumes planar YUV to be in YUV order instead of YVU.

  1017.  */

  1018. int attribute_align_arg sws_scale(struct SwsContext *c,

  1019.                                   const uint8_t * const srcSlice[],

  1020.                                   const int srcStride[], int srcSliceY,

  1021.                                   int srcSliceH, uint8_t *const dst[],

  1022.                                   const int dstStride[])

  1023. {

  1024.     int i, ret;

  1025.     const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };

  1026.     uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };

  1027.     uint8_t *rgb0_tmp = NULL;

  1028. 

  1029.     // do not mess up sliceDir if we have a "trailing" 0-size slice

  1030.     if (srcSliceH == 0)

  1031.         return 0;

  1032. 

  1033.     if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {

  1034.         av_log(c, AV_LOG_ERROR, "bad src image pointers\n");

  1035.         return 0;

  1036.     }

  1037.     if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {

  1038.         av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");

  1039.         return 0;

  1040.     }

  1041. 

  1042.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  1043.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  1044.         return 0;

  1045.     }

  1046.     if (c->sliceDir == 0) {

  1047.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  1048.     }

  1049. 

  1050.     if (usePal(c->srcFormat)) {

  1051.         for (i = 0; i < 256; i++) {

  1052.             int p, r, g, b, y, u, v, a = 0xff;

  1053.             if (c->srcFormat == PIX_FMT_PAL8) {

  1054.                 p = ((const uint32_t *)(srcSlice[1]))[i];

  1055.                 a = (p >> 24) & 0xFF;

  1056.                 r = (p >> 16) & 0xFF;

  1057.                 g = (p >>  8) & 0xFF;

  1058.                 b =  p        & 0xFF;

  1059.             } else if (c->srcFormat == PIX_FMT_RGB8) {

  1060.                 r = ( i >> 5     ) * 36;

  1061.                 g = ((i >> 2) & 7) * 36;

  1062.                 b = ( i       & 3) * 85;

  1063.             } else if (c->srcFormat == PIX_FMT_BGR8) {

  1064.                 b = ( i >> 6     ) * 85;

  1065.                 g = ((i >> 3) & 7) * 36;

  1066.                 r = ( i       & 7) * 36;

  1067.             } else if (c->srcFormat == PIX_FMT_RGB4_BYTE) {

  1068.                 r = ( i >> 3     ) * 255;

  1069.                 g = ((i >> 1) & 3) * 85;

  1070.                 b = ( i       & 1) * 255;

  1071.             } else if (c->srcFormat == PIX_FMT_GRAY8 || c->srcFormat == PIX_FMT_GRAY8A) {

  1072.                 r = g = b = i;

  1073.             } else {

  1074.                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);

  1075.                 b = ( i >> 3     ) * 255;

  1076.                 g = ((i >> 1) & 3) * 85;

  1077.                 r = ( i       & 1) * 255;

  1078.             }

  1079.             y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

  1080.             u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

  1081.             v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);

  1082.             c->pal_yuv[i]= y + (u<<8) + (v<<16) + (a<<24);

  1083. 

  1084.             switch (c->dstFormat) {

  1085.             case PIX_FMT_BGR32:

  1086. #if !HAVE_BIGENDIAN

  1087.             case PIX_FMT_RGB24:

  1088. #endif

  1089.                 c->pal_rgb[i]=  r + (g<<8) + (b<<16) + (a<<24);

  1090.                 break;

  1091.             case PIX_FMT_BGR32_1:

  1092. #if HAVE_BIGENDIAN

  1093.             case PIX_FMT_BGR24:

  1094. #endif

  1095.                 c->pal_rgb[i]= a + (r<<8) + (g<<16) + (b<<24);

  1096.                 break;

  1097.             case PIX_FMT_RGB32_1:

  1098. #if HAVE_BIGENDIAN

  1099.             case PIX_FMT_RGB24:

  1100. #endif

  1101.                 c->pal_rgb[i]= a + (b<<8) + (g<<16) + (r<<24);

  1102.                 break;

  1103.             case PIX_FMT_RGB32:

  1104. #if !HAVE_BIGENDIAN

  1105.             case PIX_FMT_BGR24:

  1106. #endif

  1107.             default:

  1108.                 c->pal_rgb[i]=  b + (g<<8) + (r<<16) + (a<<24);

  1109.             }

  1110.         }

  1111.     }

  1112. 

  1113.     if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {

  1114.         uint8_t *base;

  1115.         int x,y;

  1116.         rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);

  1117.         base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;

  1118.         for (y=0; y<srcSliceH; y++){

  1119.             memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);

  1120.             for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {

  1121.                 base[ srcStride[0]*y + x] = 0xFF;

  1122.             }

  1123.         }

  1124.         src2[0] = base;

  1125.     }

  1126. 

  1127.     // copy strides, so they can safely be modified

  1128.     if (c->sliceDir == 1) {

  1129.         // slices go from top to bottom

  1130.         int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],

  1131.                               srcStride[3] };

  1132.         int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],

  1133.                               dstStride[3] };

  1134. 

  1135.         reset_ptr(src2, c->srcFormat);

  1136.         reset_ptr((void*)dst2, c->dstFormat);

  1137. 

  1138.         /* reset slice direction at end of frame */

  1139.         if (srcSliceY + srcSliceH == c->srcH)

  1140.             c->sliceDir = 0;

  1141. 

  1142.         ret = c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,

  1143.                           dstStride2);

  1144.     } else {

  1145.         // slices go from bottom to top => we flip the image internally

  1146.         int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],

  1147.                               -srcStride[3] };

  1148.         int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],

  1149.                               -dstStride[3] };

  1150. 

  1151.         src2[0] += (srcSliceH - 1) * srcStride[0];

  1152.         if (!usePal(c->srcFormat))

  1153.             src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];

  1154.         src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];

  1155.         src2[3] += (srcSliceH - 1) * srcStride[3];

  1156.         dst2[0] += ( c->dstH                         - 1) * dstStride[0];

  1157.         dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];

  1158.         dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];

  1159.         dst2[3] += ( c->dstH                         - 1) * dstStride[3];

  1160. 

  1161.         reset_ptr(src2, c->srcFormat);

  1162.         reset_ptr((void*)dst2, c->dstFormat);

  1163. 

  1164.         /* reset slice direction at end of frame */

  1165.         if (!srcSliceY)

  1166.             c->sliceDir = 0;

  1167. 

  1168.         ret = c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,

  1169.                           srcSliceH, dst2, dstStride2);

  1170.     }

  1171. 

  1172.     av_free(rgb0_tmp);

  1173.     return ret;

  1174. }

  1175. 

  1176. /* Convert the palette to the same packed 32-bit format as the palette */

  1177. void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,

  1178.                                    int num_pixels, const uint8_t *palette)

  1179. {

  1180.     int i;

  1181. 

  1182.     for (i = 0; i < num_pixels; i++)

  1183.         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];

  1184. }

  1185. 

  1186. /* Palette format: ABCD -> dst format: ABC */

  1187. void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,

  1188.                                    int num_pixels, const uint8_t *palette)

  1189. {

  1190.     int i;

  1191. 

  1192.     for (i = 0; i < num_pixels; i++) {

  1193.         //FIXME slow?

  1194.         dst[0] = palette[src[i] * 4 + 0];

  1195.         dst[1] = palette[src[i] * 4 + 1];

  1196.         dst[2] = palette[src[i] * 4 + 2];

  1197.         dst += 3;

  1198.     }

  1199. }