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FFmpeg/libavcodec/imgconvert.c

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  1. /*

  2.  * Misc image convertion routines

  3.  * Copyright (c) 2001, 2002 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. #include "avcodec.h"

  20. #include "dsputil.h"

  21. 

  22. #ifdef USE_FASTMEMCPY

  23. #include "fastmemcpy.h"

  24. #endif

  25. /* XXX: totally non optimized */

  26. 

  27. static void yuv422_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,

  28.                               UINT8 *src, int width, int height)

  29. {

  30.     int x, y;

  31.     UINT8 *p = src;

  32. 

  33.     for(y=0;y<height;y+=2) {

  34.         for(x=0;x<width;x+=2) {

  35.             lum[0] = p[0];

  36.             cb[0] = p[1];

  37.             lum[1] = p[2];

  38.             cr[0] = p[3];

  39.             p += 4;

  40.             lum += 2;

  41.             cb++;

  42.             cr++;

  43.         }

  44.         for(x=0;x<width;x+=2) {

  45.             lum[0] = p[0];

  46.             lum[1] = p[2];

  47.             p += 4;

  48.             lum += 2;

  49.         }

  50.     }

  51. }

  52. 

  53. #define SCALEBITS 8

  54. #define ONE_HALF  (1 << (SCALEBITS - 1))

  55. #define FIX(x)		((int) ((x) * (1L<<SCALEBITS) + 0.5))

  56. 

  57. static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,

  58.                               UINT8 *src, int width, int height)

  59. {

  60.     int wrap, wrap3, x, y;

  61.     int r, g, b, r1, g1, b1;

  62.     UINT8 *p;

  63. 

  64.     wrap = width;

  65.     wrap3 = width * 3;

  66.     p = src;

  67.     for(y=0;y<height;y+=2) {

  68.         for(x=0;x<width;x+=2) {

  69.             r = p[0];

  70.             g = p[1];

  71.             b = p[2];

  72.             r1 = r;

  73.             g1 = g;

  74.             b1 = b;

  75.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  76.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  77.             r = p[3];

  78.             g = p[4];

  79.             b = p[5];

  80.             r1 += r;

  81.             g1 += g;

  82.             b1 += b;

  83.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  84.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  85.             p += wrap3;

  86.             lum += wrap;

  87. 

  88.             r = p[0];

  89.             g = p[1];

  90.             b = p[2];

  91.             r1 += r;

  92.             g1 += g;

  93.             b1 += b;

  94.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  95.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  96.             r = p[3];

  97.             g = p[4];

  98.             b = p[5];

  99.             r1 += r;

  100.             g1 += g;

  101.             b1 += b;

  102.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  103.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  104.             

  105.             cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + 

  106.                       FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  107.             cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - 

  108.                      FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  109. 

  110.             cb++;

  111.             cr++;

  112.             p += -wrap3 + 2 * 3;

  113.             lum += -wrap + 2;

  114.         }

  115.         p += wrap3;

  116.         lum += wrap;

  117.     }

  118. }

  119. 

  120. static void rgba32_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,

  121.                               UINT8 *src, int width, int height)

  122. {

  123.     int wrap, wrap4, x, y;

  124.     int r, g, b, r1, g1, b1;

  125.     UINT8 *p;

  126. 

  127.     wrap = width;

  128.     wrap4 = width * 4;

  129.     p = src;

  130.     for(y=0;y<height;y+=2) {

  131.         for(x=0;x<width;x+=2) {

  132.             r = p[0];

  133.             g = p[1];

  134.             b = p[2];

  135.             r1 = r;

  136.             g1 = g;

  137.             b1 = b;

  138.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  139.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  140.             r = p[4];

  141.             g = p[5];

  142.             b = p[6];

  143.             r1 += r;

  144.             g1 += g;

  145.             b1 += b;

  146.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  147.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  148.             p += wrap4;

  149.             lum += wrap;

  150. 

  151.             r = p[0];

  152.             g = p[1];

  153.             b = p[2];

  154.             r1 += r;

  155.             g1 += g;

  156.             b1 += b;

  157.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  158.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  159.             r = p[4];

  160.             g = p[5];

  161.             b = p[6];

  162.             r1 += r;

  163.             g1 += g;

  164.             b1 += b;

  165.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  166.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  167.             

  168.             cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + 

  169.                       FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  170.             cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - 

  171.                      FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  172. 

  173.             cb++;

  174.             cr++;

  175.             p += -wrap4 + 2 * 4;

  176.             lum += -wrap + 2;

  177.         }

  178.         p += wrap4;

  179.         lum += wrap;

  180.     }

  181. }

  182. 

  183. static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,

  184.                               UINT8 *src, int width, int height)

  185. {

  186.     int wrap, wrap3, x, y;

  187.     int r, g, b, r1, g1, b1;

  188.     UINT8 *p;

  189. 

  190.     wrap = width;

  191.     wrap3 = width * 3;

  192.     p = src;

  193.     for(y=0;y<height;y+=2) {

  194.         for(x=0;x<width;x+=2) {

  195.             b = p[0];

  196.             g = p[1];

  197.             r = p[2];

  198.             r1 = r;

  199.             g1 = g;

  200.             b1 = b;

  201.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  202.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  203.             b = p[3];

  204.             g = p[4];

  205.             r = p[5];

  206.             r1 += r;

  207.             g1 += g;

  208.             b1 += b;

  209.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  210.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  211.             p += wrap3;

  212.             lum += wrap;

  213. 

  214.             b = p[0];

  215.             g = p[1];

  216.             r = p[2];

  217.             r1 += r;

  218.             g1 += g;

  219.             b1 += b;

  220.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  221.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  222.             b = p[3];

  223.             g = p[4];

  224.             r = p[5];

  225.             r1 += r;

  226.             g1 += g;

  227.             b1 += b;

  228.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  229.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  230.             

  231.             cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + 

  232.                       FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  233.             cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - 

  234.                      FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  235. 

  236.             cb++;

  237.             cr++;

  238.             p += -wrap3 + 2 * 3;

  239.             lum += -wrap + 2;

  240.         }

  241.         p += wrap3;

  242.         lum += wrap;

  243.     }

  244. }

  245. 

  246. static void bgra32_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,

  247.                               UINT8 *src, int width, int height)

  248. {

  249.     int wrap, wrap4, x, y;

  250.     int r, g, b, r1, g1, b1;

  251.     UINT8 *p;

  252. 

  253.     wrap = width;

  254.     wrap4 = width * 4;

  255.     p = src;

  256.     for(y=0;y<height;y+=2) {

  257.         for(x=0;x<width;x+=2) {

  258.             b = p[0];

  259.             g = p[1];

  260.             r = p[2];

  261.             r1 = r;

  262.             g1 = g;

  263.             b1 = b;

  264.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  265.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  266.             b = p[4];

  267.             g = p[5];

  268.             r = p[6];

  269.             r1 += r;

  270.             g1 += g;

  271.             b1 += b;

  272.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  273.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  274.             p += wrap4;

  275.             lum += wrap;

  276. 

  277.             b = p[0];

  278.             g = p[1];

  279.             r = p[2];

  280.             r1 += r;

  281.             g1 += g;

  282.             b1 += b;

  283.             lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  284.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  285.             b = p[4];

  286.             g = p[5];

  287.             r = p[6];

  288.             r1 += r;

  289.             g1 += g;

  290.             b1 += b;

  291.             lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 

  292.                       FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;

  293.             

  294.             cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + 

  295.                       FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  296.             cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - 

  297.                      FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;

  298. 

  299.             cb++;

  300.             cr++;

  301.             p += -wrap4 + 2 * 4;

  302.             lum += -wrap + 2;

  303.         }

  304.         p += wrap4;

  305.         lum += wrap;

  306.     }

  307. }

  308. 

  309. /* XXX: use generic filter ? */

  310. /* 1x2 -> 1x1 */

  311. static void shrink2(UINT8 *dst, int dst_wrap, 

  312.                     UINT8 *src, int src_wrap,

  313.                     int width, int height)

  314. {

  315.     int w;

  316.     UINT8 *s1, *s2, *d;

  317. 

  318.     for(;height > 0; height--) {

  319.         s1 = src;

  320.         s2 = s1 + src_wrap;

  321.         d = dst;

  322.         for(w = width;w >= 4; w-=4) {

  323.             d[0] = (s1[0] + s2[0]) >> 1;

  324.             d[1] = (s1[1] + s2[1]) >> 1;

  325.             d[2] = (s1[2] + s2[2]) >> 1;

  326.             d[3] = (s1[3] + s2[3]) >> 1;

  327.             s1 += 4;

  328.             s2 += 4;

  329.             d += 4;

  330.         }

  331.         for(;w > 0; w--) {

  332.             d[0] = (s1[0] + s2[0]) >> 1;

  333.             s1++;

  334.             s2++;

  335.             d++;

  336.         }

  337.         src += 2 * src_wrap;

  338.         dst += dst_wrap;

  339.     }

  340. }

  341. 

  342. /* 2x2 -> 1x1 */

  343. static void shrink22(UINT8 *dst, int dst_wrap, 

  344.                      UINT8 *src, int src_wrap,

  345.                      int width, int height)

  346. {

  347.     int w;

  348.     UINT8 *s1, *s2, *d;

  349. 

  350.     for(;height > 0; height--) {

  351.         s1 = src;

  352.         s2 = s1 + src_wrap;

  353.         d = dst;

  354.         for(w = width;w >= 4; w-=4) {

  355.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;

  356.             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 1;

  357.             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 1;

  358.             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 1;

  359.             s1 += 8;

  360.             s2 += 8;

  361.             d += 4;

  362.         }

  363.         for(;w > 0; w--) {

  364.             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;

  365.             s1 += 2;

  366.             s2 += 2;

  367.             d++;

  368.         }

  369.         src += 2 * src_wrap;

  370.         dst += dst_wrap;

  371.     }

  372. }

  373. 

  374. /* 1x1 -> 2x2 */

  375. static void grow22(UINT8 *dst, int dst_wrap,

  376.                      UINT8 *src, int src_wrap,

  377.                      int width, int height)

  378. {

  379.     int w;

  380.     UINT8 *s1, *d;

  381. 

  382.     for(;height > 0; height--) {

  383.         s1 = src;

  384.         d = dst;

  385.         for(w = width;w >= 4; w-=4) {

  386.             d[1] = d[0] = s1[0];

  387.             d[3] = d[2] = s1[1];

  388.             s1 += 2;

  389.             d += 4;

  390.         }

  391.         for(;w > 0; w--) {

  392.             d[0] = s1[0];

  393.             s1 ++;

  394.             d++;

  395.         }

  396.         if (height%2)

  397.             src += src_wrap;

  398.         dst += dst_wrap;

  399.     }

  400. }

  401. 

  402. static void img_copy(UINT8 *dst, int dst_wrap, 

  403.                      UINT8 *src, int src_wrap,

  404.                      int width, int height)

  405. {

  406.     for(;height > 0; height--) {

  407.         memcpy(dst, src, width);

  408.         dst += dst_wrap;

  409.         src += src_wrap;

  410.     }

  411. }

  412. 

  413. #define SCALE_BITS 10

  414. 

  415. #define C_Y  (76309 >> (16 - SCALE_BITS))

  416. #define C_RV (117504 >> (16 - SCALE_BITS))

  417. #define C_BU (138453 >> (16 - SCALE_BITS))

  418. #define C_GU (13954 >> (16 - SCALE_BITS))

  419. #define C_GV (34903 >> (16 - SCALE_BITS))

  420. 

  421. #define RGBOUT(r, g, b, y1)\

  422. {\

  423.     y = (y1 - 16) * C_Y;\

  424.     r = cm[(y + r_add) >> SCALE_BITS];\

  425.     g = cm[(y + g_add) >> SCALE_BITS];\

  426.     b = cm[(y + b_add) >> SCALE_BITS];\

  427. }

  428. 

  429. /* XXX: no chroma interpolating is done */

  430. static void yuv420p_to_bgra32(AVPicture *dst, AVPicture *src, 

  431.                              int width, int height)

  432. {

  433.     UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;

  434.     int w, y, cb, cr, r_add, g_add, b_add, width2;

  435.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  436. 

  437.     d = dst->data[0];

  438.     y1_ptr = src->data[0];

  439.     cb_ptr = src->data[1];

  440.     cr_ptr = src->data[2];

  441.     width2 = width >> 1;

  442.     for(;height > 0; height -= 2) {

  443.         d1 = d;

  444.         d2 = d + dst->linesize[0];

  445.         y2_ptr = y1_ptr + src->linesize[0];

  446.         for(w = width2; w > 0; w --) {

  447.             cb = cb_ptr[0] - 128;

  448.             cr = cr_ptr[0] - 128;

  449.             r_add = C_RV * cr + (1 << (SCALE_BITS - 1));

  450.             g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));

  451.             b_add = C_BU * cb + (1 << (SCALE_BITS - 1));

  452.             

  453.             /* output 4 pixels */

  454.             RGBOUT(d1[2], d1[1], d1[0], y1_ptr[0]);

  455.             RGBOUT(d1[6], d1[5], d1[4], y1_ptr[1]);

  456.             RGBOUT(d2[2], d2[1], d2[0], y2_ptr[0]);

  457.             RGBOUT(d2[6], d2[5], d2[4], y2_ptr[1]);

  458. 

  459.             d1[3] = d1[7] = d2[3] = d2[7] = 255;

  460. 

  461.             d1 += 8;

  462.             d2 += 8;

  463.             y1_ptr += 2;

  464.             y2_ptr += 2;

  465.             cb_ptr++;

  466.             cr_ptr++;

  467.         }

  468.         d += 2 * dst->linesize[0];

  469.         y1_ptr += 2 * src->linesize[0] - width;

  470.         cb_ptr += src->linesize[1] - width2;

  471.         cr_ptr += src->linesize[2] - width2;

  472.     }

  473. }

  474. 

  475. /* XXX: no chroma interpolating is done */

  476. static void yuv420p_to_rgba32(AVPicture *dst, AVPicture *src, 

  477.                              int width, int height)

  478. {

  479.     UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;

  480.     int w, y, cb, cr, r_add, g_add, b_add, width2;

  481.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  482. 

  483.     d = dst->data[0];

  484.     y1_ptr = src->data[0];

  485.     cb_ptr = src->data[1];

  486.     cr_ptr = src->data[2];

  487.     width2 = width >> 1;

  488.     for(;height > 0; height -= 2) {

  489.         d1 = d;

  490.         d2 = d + dst->linesize[0];

  491.         y2_ptr = y1_ptr + src->linesize[0];

  492.         for(w = width2; w > 0; w --) {

  493.             cb = cb_ptr[0] - 128;

  494.             cr = cr_ptr[0] - 128;

  495.             r_add = C_RV * cr + (1 << (SCALE_BITS - 1));

  496.             g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));

  497.             b_add = C_BU * cb + (1 << (SCALE_BITS - 1));

  498.             

  499.             /* output 4 pixels */

  500.             RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);

  501.             RGBOUT(d1[4], d1[5], d1[6], y1_ptr[1]);

  502.             RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);

  503.             RGBOUT(d2[4], d2[5], d2[6], y2_ptr[1]);

  504. 

  505.             d1[3] = d1[7] = d2[3] = d2[7] = 255;

  506. 

  507.             d1 += 8;

  508.             d2 += 8;

  509.             y1_ptr += 2;

  510.             y2_ptr += 2;

  511.             cb_ptr++;

  512.             cr_ptr++;

  513.         }

  514.         d += 2 * dst->linesize[0];

  515.         y1_ptr += 2 * src->linesize[0] - width;

  516.         cb_ptr += src->linesize[1] - width2;

  517.         cr_ptr += src->linesize[2] - width2;

  518.     }

  519. }

  520. 

  521. /* XXX: no chroma interpolating is done */

  522. static void yuv420p_to_rgb24(AVPicture *dst, AVPicture *src, 

  523.                              int width, int height)

  524. {

  525.     UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;

  526.     int w, y, cb, cr, r_add, g_add, b_add, width2;

  527.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  528. 

  529.     d = dst->data[0];

  530.     y1_ptr = src->data[0];

  531.     cb_ptr = src->data[1];

  532.     cr_ptr = src->data[2];

  533.     width2 = width >> 1;

  534.     for(;height > 0; height -= 2) {

  535.         d1 = d;

  536.         d2 = d + dst->linesize[0];

  537.         y2_ptr = y1_ptr + src->linesize[0];

  538.         for(w = width2; w > 0; w --) {

  539.             cb = cb_ptr[0] - 128;

  540.             cr = cr_ptr[0] - 128;

  541.             r_add = C_RV * cr + (1 << (SCALE_BITS - 1));

  542.             g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));

  543.             b_add = C_BU * cb + (1 << (SCALE_BITS - 1));

  544.             

  545.             /* output 4 pixels */

  546.             RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);

  547.             RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);

  548.             RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);

  549.             RGBOUT(d2[3], d2[4], d2[5], y2_ptr[1]);

  550. 

  551.             d1 += 6;

  552.             d2 += 6;

  553.             y1_ptr += 2;

  554.             y2_ptr += 2;

  555.             cb_ptr++;

  556.             cr_ptr++;

  557.         }

  558.         d += 2 * dst->linesize[0];

  559.         y1_ptr += 2 * src->linesize[0] - width;

  560.         cb_ptr += src->linesize[1] - width2;

  561.         cr_ptr += src->linesize[2] - width2;

  562.     }

  563. }

  564. 

  565. /* XXX: no chroma interpolating is done */

  566. static void yuv422p_to_rgb24(AVPicture *dst, AVPicture *src, 

  567.                              int width, int height)

  568. {

  569.     UINT8 *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;

  570.     int w, y, cb, cr, r_add, g_add, b_add, width2;

  571.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  572. 

  573.     d = dst->data[0];

  574.     y1_ptr = src->data[0];

  575.     cb_ptr = src->data[1];

  576.     cr_ptr = src->data[2];

  577.     width2 = width >> 1;

  578.     for(;height > 0; height --) {

  579.         d1 = d;

  580.         for(w = width2; w > 0; w --) {

  581.             cb = cb_ptr[0] - 128;

  582.             cr = cr_ptr[0] - 128;

  583.             r_add = C_RV * cr + (1 << (SCALE_BITS - 1));

  584.             g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));

  585.             b_add = C_BU * cb + (1 << (SCALE_BITS - 1));

  586.             

  587.             /* output 2 pixels */

  588.             RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);

  589.             RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);

  590. 

  591.             d1 += 6;

  592.             y1_ptr += 2;

  593.             cb_ptr++;

  594.             cr_ptr++;

  595.         }

  596.         d += dst->linesize[0];

  597.         y1_ptr += src->linesize[0] - width;

  598.         cb_ptr += src->linesize[1] - width2;

  599.         cr_ptr += src->linesize[2] - width2;

  600.     }

  601. }

  602. 

  603. /* XXX: always use linesize. Return -1 if not supported */

  604. int img_convert(AVPicture *dst, int dst_pix_fmt,

  605.                 AVPicture *src, int pix_fmt, 

  606.                 int width, int height)

  607. {

  608.     int i;

  609. 

  610.     assert(pix_fmt != PIX_FMT_ANY && dst_pix_fmt != PIX_FMT_ANY);

  611. 

  612.     if (dst_pix_fmt == pix_fmt) {

  613.         switch(pix_fmt) {

  614.         case PIX_FMT_YUV420P:

  615.             for(i=0;i<3;i++) {

  616.                 if (i == 1) {

  617.                     width >>= 1;

  618.                     height >>= 1;

  619.                 }

  620.                 img_copy(dst->data[i], dst->linesize[i],

  621.                          src->data[i], src->linesize[i],

  622.                          width, height);

  623.             }

  624.             break;

  625.         default:

  626.             return -1;

  627.         }

  628.     } else if (dst_pix_fmt == PIX_FMT_YUV420P) {

  629.         

  630.         switch(pix_fmt) {

  631.         case PIX_FMT_YUV410P:

  632.             img_copy(dst->data[0], dst->linesize[0],

  633.                      src->data[0], src->linesize[0],

  634.                      width, height);

  635.             grow22(dst->data[1], dst->linesize[1],

  636.                      src->data[1], src->linesize[1],

  637.                      width/2, height/2);

  638.             grow22(dst->data[2], dst->linesize[2],

  639.                      src->data[2], src->linesize[2],

  640.                      width/2, height/2);

  641.             break;

  642.         case PIX_FMT_YUV420P:

  643.             for(i=0;i<3;i++) {

  644.                 img_copy(dst->data[i], dst->linesize[i],

  645.                          src->data[i], src->linesize[i],

  646.                          width, height);

  647.             }

  648.             break;

  649.         case PIX_FMT_YUV422P:

  650.             img_copy(dst->data[0], dst->linesize[0],

  651.                      src->data[0], src->linesize[0],

  652.                      width, height);

  653.             width >>= 1;

  654.             height >>= 1;

  655.             for(i=1;i<3;i++) {

  656.                 shrink2(dst->data[i], dst->linesize[i],

  657.                         src->data[i], src->linesize[i],

  658.                         width, height);

  659.             }

  660.             break;

  661.         case PIX_FMT_YUV444P:

  662.             img_copy(dst->data[0], dst->linesize[0],

  663.                      src->data[0], src->linesize[0],

  664.                      width, height);

  665.             width >>= 1;

  666.             height >>= 1;

  667.             for(i=1;i<3;i++) {

  668.                 shrink22(dst->data[i], dst->linesize[i],

  669.                          src->data[i], src->linesize[i],

  670.                          width, height);

  671.             }

  672.             break;

  673.         case PIX_FMT_YUV422:

  674.             yuv422_to_yuv420p(dst->data[0], dst->data[1], dst->data[2], 

  675.                               src->data[0], width, height);

  676.             break;

  677.         case PIX_FMT_RGB24:

  678.             rgb24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2], 

  679.                              src->data[0], width, height);

  680.             break;

  681.         case PIX_FMT_RGBA32:

  682.             rgba32_to_yuv420p(dst->data[0], dst->data[1], dst->data[2], 

  683.                              src->data[0], width, height);

  684.             break;

  685.         case PIX_FMT_BGR24:

  686.             bgr24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2], 

  687.                              src->data[0], width, height);

  688.             break;

  689.         case PIX_FMT_BGRA32:

  690.             bgra32_to_yuv420p(dst->data[0], dst->data[1], dst->data[2], 

  691.                              src->data[0], width, height);

  692.             break;

  693.         default:

  694.             return -1;

  695.         }

  696.     } else if (dst_pix_fmt == PIX_FMT_RGB24) {

  697.         switch(pix_fmt) {

  698.         case PIX_FMT_YUV420P:

  699.             yuv420p_to_rgb24(dst, src, width, height);

  700.             break;

  701.         case PIX_FMT_YUV422P:

  702.             yuv422p_to_rgb24(dst, src, width, height);

  703.             break;

  704.         default:

  705.             return -1;

  706.         }

  707.     } else if (dst_pix_fmt == PIX_FMT_RGBA32) {

  708.         switch(pix_fmt) {

  709.         case PIX_FMT_YUV420P:

  710.             yuv420p_to_rgba32(dst, src, width, height);

  711.             break;

  712.         default:

  713.             return -1;

  714.         }

  715.     } else if (dst_pix_fmt == PIX_FMT_BGRA32) {

  716.         switch(pix_fmt) {

  717.         case PIX_FMT_YUV420P:

  718.             yuv420p_to_bgra32(dst, src, width, height);

  719.             break;

  720.         default:

  721.             return -1;

  722.         }

  723.     } else {

  724.         return -1;

  725.     }

  726.     return 0;

  727. }

  728. 

  729. /* filter parameters: [-1 4 2 4 -1] // 8 */

  730. static void deinterlace_line(UINT8 *dst, UINT8 *src, int src_wrap,

  731.                              int size)

  732. {

  733.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  734.     int sum;

  735.     UINT8 *s;

  736. 

  737.     for(;size > 0;size--) {

  738.         s = src;

  739.         sum = -s[0];

  740.         s += src_wrap;

  741.         sum += s[0] << 2;

  742.         s += src_wrap;

  743.         sum += s[0] << 1;

  744.         s += src_wrap;

  745.         sum += s[0] << 2;

  746.         s += src_wrap;

  747.         sum += -s[0];

  748.         dst[0] = cm[(sum + 4) >> 3];

  749.         dst++;

  750.         src++;

  751.     }

  752. }

  753. 

  754. /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The

  755.    top field is copied as is, but the bottom field is deinterlaced

  756.    against the top field. */

  757. static void deinterlace_bottom_field(UINT8 *dst, int dst_wrap,

  758.                                      UINT8 *src1, int src_wrap,

  759.                                      int width, int height)

  760. {

  761.     UINT8 *src, *ptr;

  762.     int y, y1, i;

  763.     UINT8 *buf;

  764. 

  765.     buf = (UINT8*)av_malloc(5 * width);

  766. 

  767.     src = src1;

  768.     for(y=0;y<height;y+=2) {

  769.         /* copy top field line */

  770.         memcpy(dst, src, width);

  771.         dst += dst_wrap;

  772.         src += (1 - 2) * src_wrap;

  773.         y1 = y - 2;

  774.         if (y1 >= 0 && (y1 + 4) < height) {

  775.             /* fast case : no edges */

  776.             deinterlace_line(dst, src, src_wrap, width);

  777.         } else {

  778.             /* in order to use the same function, we use an intermediate buffer */

  779.             ptr = buf;

  780.             for(i=0;i<5;i++) {

  781.                 if (y1 < 0)

  782.                     memcpy(ptr, src1, width);

  783.                 else if (y1 >= height) 

  784.                     memcpy(ptr, src1 + (height - 1) * src_wrap, width);

  785.                 else

  786.                     memcpy(ptr, src1 + y1 * src_wrap, width);

  787.                 y1++;

  788.                 ptr += width;

  789.             }

  790.             deinterlace_line(dst, buf, width, width);

  791.         }

  792.         dst += dst_wrap;

  793.         src += (2 + 1) * src_wrap;

  794.     }

  795.     av_free(buf);

  796. }

  797. 

  798. 

  799. /* deinterlace, return -1 if format not handled */

  800. int avpicture_deinterlace(AVPicture *dst, AVPicture *src,

  801.                           int pix_fmt, int width, int height)

  802. {

  803.     int i;

  804. 

  805.     if (pix_fmt != PIX_FMT_YUV420P &&

  806.         pix_fmt != PIX_FMT_YUV422P &&

  807.         pix_fmt != PIX_FMT_YUV444P)

  808.         return -1;

  809.     if ((width & 1) != 0 || (height & 3) != 0)

  810.         return -1;

  811.     

  812.     for(i=0;i<3;i++) {

  813.         if (i == 1) {

  814.             switch(pix_fmt) {

  815.             case PIX_FMT_YUV420P:

  816.                 width >>= 1;

  817.                 height >>= 1;

  818.                 break;

  819.             case PIX_FMT_YUV422P:

  820.                 width >>= 1;

  821.                 break;

  822.             default:

  823.                 break;

  824.             }

  825.         }

  826.         deinterlace_bottom_field(dst->data[i], dst->linesize[i],

  827.                                  src->data[i], src->linesize[i],

  828.                                  width, height);

  829.     }

  830.     return 0;

  831. }

  832. 

  833. #undef FIX