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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. /* 1x2 -> 2x1. width and height are given for the source picture */

  403. static void conv411(UINT8 *dst, int dst_wrap, 

  404.                     UINT8 *src, int src_wrap,

  405.                     int width, int height)

  406. {

  407.     int w, c;

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

  409. 

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

  411.         s1 = src;

  412.         s2 = src + src_wrap;

  413.         d = dst;

  414.         for(w = width;w > 0; w--) {

  415.             c = (s1[0] + s2[0]) >> 1;

  416.             d[0] = c;

  417.             d[1] = c;

  418.             s1++;

  419.             s2++;

  420.             d += 2;

  421.         }

  422.         src += src_wrap * 2;

  423.         dst += dst_wrap;

  424.     }

  425. }

  426. 

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

  428.                      UINT8 *src, int src_wrap,

  429.                      int width, int height)

  430. {

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

  432.         memcpy(dst, src, width);

  433.         dst += dst_wrap;

  434.         src += src_wrap;

  435.     }

  436. }

  437. 

  438. #define SCALE_BITS 10

  439. 

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

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

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

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

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

  445. 

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

  447. {\

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

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

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

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

  452. }

  453. 

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

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

  456.                              int width, int height)

  457. {

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

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

  460.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  461. 

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

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

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

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

  466.     width2 = width >> 1;

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

  468.         d1 = d;

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

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

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

  472.             cb = cb_ptr[0] - 128;

  473.             cr = cr_ptr[0] - 128;

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

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

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

  477.             

  478.             /* output 4 pixels */

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

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

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

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

  483. 

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

  485. 

  486.             d1 += 8;

  487.             d2 += 8;

  488.             y1_ptr += 2;

  489.             y2_ptr += 2;

  490.             cb_ptr++;

  491.             cr_ptr++;

  492.         }

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

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

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

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

  497.     }

  498. }

  499. 

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

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

  502.                              int width, int height)

  503. {

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

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

  506.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  507. 

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

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

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

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

  512.     width2 = width >> 1;

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

  514.         d1 = d;

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

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

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

  518.             cb = cb_ptr[0] - 128;

  519.             cr = cr_ptr[0] - 128;

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

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

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

  523.             

  524.             /* output 4 pixels */

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

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

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

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

  529. 

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

  531. 

  532.             d1 += 8;

  533.             d2 += 8;

  534.             y1_ptr += 2;

  535.             y2_ptr += 2;

  536.             cb_ptr++;

  537.             cr_ptr++;

  538.         }

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

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

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

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

  543.     }

  544. }

  545. 

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

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

  548.                              int width, int height)

  549. {

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

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

  552.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  553. 

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

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

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

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

  558.     width2 = width >> 1;

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

  560.         d1 = d;

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

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

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

  564.             cb = cb_ptr[0] - 128;

  565.             cr = cr_ptr[0] - 128;

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

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

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

  569.             

  570.             /* output 4 pixels */

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

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

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

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

  575. 

  576.             d1 += 6;

  577.             d2 += 6;

  578.             y1_ptr += 2;

  579.             y2_ptr += 2;

  580.             cb_ptr++;

  581.             cr_ptr++;

  582.         }

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

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

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

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

  587.     }

  588. }

  589. 

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

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

  592.                              int width, int height)

  593. {

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

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

  596.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  597. 

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

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

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

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

  602.     width2 = width >> 1;

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

  604.         d1 = d;

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

  606.             cb = cb_ptr[0] - 128;

  607.             cr = cr_ptr[0] - 128;

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

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

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

  611.             

  612.             /* output 2 pixels */

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

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

  615. 

  616.             d1 += 6;

  617.             y1_ptr += 2;

  618.             cb_ptr++;

  619.             cr_ptr++;

  620.         }

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

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

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

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

  625.     }

  626. }

  627. 

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

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

  630.                 AVPicture *src, int pix_fmt, 

  631.                 int width, int height)

  632. {

  633.     int i;

  634. 

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

  636. 

  637.     if (dst_pix_fmt == pix_fmt) {

  638.         switch(pix_fmt) {

  639.         case PIX_FMT_YUV420P:

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

  641.                 if (i == 1) {

  642.                     width >>= 1;

  643.                     height >>= 1;

  644.                 }

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

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

  647.                          width, height);

  648.             }

  649.             break;

  650.         default:

  651.             return -1;

  652.         }

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

  654.         

  655.         switch(pix_fmt) {

  656.         case PIX_FMT_YUV411P:

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

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

  659.                      width, height);

  660.             conv411(dst->data[1], dst->linesize[1],

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

  662.                     width / 4, height);

  663.             conv411(dst->data[2], dst->linesize[2],

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

  665.                     width / 4, height);

  666.             break;

  667.         case PIX_FMT_YUV410P:

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

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

  670.                      width, height);

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

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

  673.                      width/2, height/2);

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

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

  676.                      width/2, height/2);

  677.             break;

  678.         case PIX_FMT_YUV420P:

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

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

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

  682.                          width, height);

  683.             }

  684.             break;

  685.         case PIX_FMT_YUV422P:

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

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

  688.                      width, height);

  689.             width >>= 1;

  690.             height >>= 1;

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

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

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

  694.                         width, height);

  695.             }

  696.             break;

  697.         case PIX_FMT_YUV444P:

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

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

  700.                      width, height);

  701.             width >>= 1;

  702.             height >>= 1;

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

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

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

  706.                          width, height);

  707.             }

  708.             break;

  709.         case PIX_FMT_YUV422:

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

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

  712.             break;

  713.         case PIX_FMT_RGB24:

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

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

  716.             break;

  717.         case PIX_FMT_RGBA32:

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

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

  720.             break;

  721.         case PIX_FMT_BGR24:

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

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

  724.             break;

  725.         case PIX_FMT_BGRA32:

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

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

  728.             break;

  729.         default:

  730.             return -1;

  731.         }

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

  733.         switch(pix_fmt) {

  734.         case PIX_FMT_YUV420P:

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

  736.             break;

  737.         case PIX_FMT_YUV422P:

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

  739.             break;

  740.         default:

  741.             return -1;

  742.         }

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

  744.         switch(pix_fmt) {

  745.         case PIX_FMT_YUV420P:

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

  747.             break;

  748.         default:

  749.             return -1;

  750.         }

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

  752.         switch(pix_fmt) {

  753.         case PIX_FMT_YUV420P:

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

  755.             break;

  756.         default:

  757.             return -1;

  758.         }

  759.     } else {

  760.         return -1;

  761.     }

  762.     return 0;

  763. }

  764. 

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

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

  767.                              int size)

  768. {

  769.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  770.     int sum;

  771.     UINT8 *s;

  772. 

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

  774.         s = src;

  775.         sum = -s[0];

  776.         s += src_wrap;

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

  778.         s += src_wrap;

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

  780.         s += src_wrap;

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

  782.         s += src_wrap;

  783.         sum += -s[0];

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

  785.         dst++;

  786.         src++;

  787.     }

  788. }

  789. 

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

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

  792.    against the top field. */

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

  794.                                      UINT8 *src1, int src_wrap,

  795.                                      int width, int height)

  796. {

  797.     UINT8 *src, *ptr;

  798.     int y, y1, i;

  799.     UINT8 *buf;

  800. 

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

  802. 

  803.     src = src1;

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

  805.         /* copy top field line */

  806.         memcpy(dst, src, width);

  807.         dst += dst_wrap;

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

  809.         y1 = y - 2;

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

  811.             /* fast case : no edges */

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

  813.         } else {

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

  815.             ptr = buf;

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

  817.                 if (y1 < 0)

  818.                     memcpy(ptr, src1, width);

  819.                 else if (y1 >= height) 

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

  821.                 else

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

  823.                 y1++;

  824.                 ptr += width;

  825.             }

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

  827.         }

  828.         dst += dst_wrap;

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

  830.     }

  831.     av_free(buf);

  832. }

  833. 

  834. 

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

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

  837.                           int pix_fmt, int width, int height)

  838. {

  839.     int i;

  840. 

  841.     if (pix_fmt != PIX_FMT_YUV420P &&

  842.         pix_fmt != PIX_FMT_YUV422P &&

  843.         pix_fmt != PIX_FMT_YUV444P)

  844.         return -1;

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

  846.         return -1;

  847.     

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

  849.         if (i == 1) {

  850.             switch(pix_fmt) {

  851.             case PIX_FMT_YUV420P:

  852.                 width >>= 1;

  853.                 height >>= 1;

  854.                 break;

  855.             case PIX_FMT_YUV422P:

  856.                 width >>= 1;

  857.                 break;

  858.             default:

  859.                 break;

  860.             }

  861.         }

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

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

  864.                                  width, height);

  865.     }

  866.     return 0;

  867. }

  868. 

  869. #undef FIX