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FFmpeg/libavcodec/indeo3.c

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  1. /*

  2.  * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg

  3.  * written, produced, and directed by Alan Smithee

  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. 

  20. #include <stdio.h>

  21. #include <stdlib.h>

  22. #include <string.h>

  23. #include <unistd.h>

  24. 

  25. #include "common.h"

  26. #include "avcodec.h"

  27. #include "dsputil.h"

  28. #include "mpegvideo.h"

  29. 

  30. #include "indeo3data.h"

  31. 

  32. typedef struct

  33. {

  34.   unsigned char *Ybuf;

  35.   unsigned char *Ubuf;

  36.   unsigned char *Vbuf;

  37.   unsigned char *the_buf;

  38.   unsigned int the_buf_size;

  39.   unsigned short y_w, y_h;

  40.   unsigned short uv_w, uv_h;

  41. } YUVBufs;

  42. 

  43. typedef struct Indeo3DecodeContext {

  44.     AVCodecContext *avctx;

  45.     int width, height;

  46.     AVFrame frame;

  47. 

  48.     YUVBufs iv_frame[2];

  49.     YUVBufs *cur_frame;

  50.     YUVBufs *ref_frame;

  51. 

  52.     unsigned char *ModPred;

  53.     unsigned short *corrector_type;

  54. } Indeo3DecodeContext;

  55. 

  56. static int corrector_type_0[24] = {

  57.   195, 159, 133, 115, 101,  93,  87,  77,

  58.   195, 159, 133, 115, 101,  93,  87,  77,

  59.   128,  79,  79,  79,  79,  79,  79,  79

  60. };

  61. 

  62. static int corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };

  63. 

  64. static void build_modpred(Indeo3DecodeContext *s) 

  65. {

  66.   int i, j;

  67. 

  68.   s->ModPred = (unsigned char *) av_malloc (8 * 128);

  69. 

  70.   for (i=0; i < 128; ++i) {

  71.     s->ModPred[i+0*128] = (i > 126) ? 254 : 2*((i + 1) - ((i + 1) % 2));

  72.     s->ModPred[i+1*128] = (i == 7)  ?  20 : ((i == 119 || i == 120)

  73. 				 ? 236 : 2*((i + 2) - ((i + 1) % 3)));

  74.     s->ModPred[i+2*128] = (i > 125) ? 248 : 2*((i + 2) - ((i + 2) % 4));

  75.     s->ModPred[i+3*128] =			 2*((i + 1) - ((i - 3) % 5));

  76.     s->ModPred[i+4*128] = (i == 8)  ?  20 : 2*((i + 1) - ((i - 3) % 6));

  77.     s->ModPred[i+5*128] =			 2*((i + 4) - ((i + 3) % 7));

  78.     s->ModPred[i+6*128] = (i > 123) ? 240 : 2*((i + 4) - ((i + 4) % 8));

  79.     s->ModPred[i+7*128] =			 2*((i + 5) - ((i + 4) % 9));

  80.   }

  81. 

  82.   s->corrector_type = (unsigned short *) av_malloc (24 * 256 * sizeof(unsigned short));

  83. 

  84.   for (i=0; i < 24; ++i) {

  85.     for (j=0; j < 256; ++j) {

  86.       s->corrector_type[i*256+j] = (j < corrector_type_0[i])

  87. 				? 1 : ((j < 248 || (i == 16 && j == 248))

  88. 				       ? 0 : corrector_type_2[j - 248]);

  89.     }

  90.   }

  91. }

  92. 

  93. static void iv_Decode_Chunk(Indeo3DecodeContext *s, unsigned char *cur, 

  94.   unsigned char *ref, int width, int height, unsigned char *buf1, 

  95.   long fflags2, unsigned char *hdr,

  96.   unsigned char *buf2, int min_width_160);

  97. 

  98. #define min(a,b) ((a) < (b) ? (a) : (b))

  99. 

  100. /* ---------------------------------------------------------------------- */

  101. static void iv_alloc_frames(Indeo3DecodeContext *s) 

  102. {

  103.   int luma_width, luma_height, luma_pixels, chroma_width, chroma_height,

  104.     chroma_pixels, bufsize, i;

  105. 

  106.   luma_width = (s->width + 15) & -0x10;

  107.   luma_height = (s->height + 15) & -0x10;

  108. 

  109.   s->iv_frame[0].y_w = s->iv_frame[0].y_h = 

  110.     s->iv_frame[0].the_buf_size = 0;

  111.   s->iv_frame[1].y_w = s->iv_frame[1].y_h = 

  112.     s->iv_frame[1].the_buf_size = 0;

  113.   s->iv_frame[1].the_buf = NULL;

  114. 

  115.   chroma_width = luma_width >> 2;

  116.   chroma_height = luma_height >> 2;

  117.   luma_pixels = luma_width * luma_height;

  118.   chroma_pixels = chroma_width * chroma_height;

  119. 

  120.   bufsize = luma_pixels * 2 + luma_width * 3 + 

  121.     (chroma_pixels + chroma_width) * 4;

  122. 

  123.   if((s->iv_frame[0].the_buf = 

  124.     (s->iv_frame[0].the_buf_size == 0 ? av_malloc(bufsize) : 

  125.       av_realloc(s->iv_frame[0].the_buf, bufsize))) == NULL)

  126.     return;

  127.   s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;

  128.   s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;

  129.   s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;

  130.   s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;

  131.   s->iv_frame[0].the_buf_size = bufsize;

  132. 

  133.   s->iv_frame[0].Ybuf = s->iv_frame[0].the_buf + luma_width;

  134.   i = luma_pixels + luma_width * 2;

  135.   s->iv_frame[1].Ybuf = s->iv_frame[0].the_buf + i;

  136.   i += (luma_pixels + luma_width);

  137.   s->iv_frame[0].Ubuf = s->iv_frame[0].the_buf + i;

  138.   i += (chroma_pixels + chroma_width);

  139.   s->iv_frame[1].Ubuf = s->iv_frame[0].the_buf + i;

  140.   i += (chroma_pixels + chroma_width);

  141.   s->iv_frame[0].Vbuf = s->iv_frame[0].the_buf + i;

  142.   i += (chroma_pixels + chroma_width);

  143.   s->iv_frame[1].Vbuf = s->iv_frame[0].the_buf + i;

  144. 

  145.   for(i = 1; i <= luma_width; i++)

  146.     s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] = 

  147.       s->iv_frame[0].Ubuf[-i] = 0x80;

  148. 

  149.   for(i = 1; i <= chroma_width; i++) {

  150.     s->iv_frame[1].Ubuf[-i] = 0x80;

  151.     s->iv_frame[0].Vbuf[-i] = 0x80;

  152.     s->iv_frame[1].Vbuf[-i] = 0x80;

  153.     s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;

  154.   }

  155. }

  156. 

  157. /* ---------------------------------------------------------------------- */

  158. static void iv_free_func(Indeo3DecodeContext *s) 

  159. {

  160.   int i;

  161. 

  162.   for(i = 0 ; i < 2 ; i++) {

  163.     if(s->iv_frame[i].the_buf != NULL) 

  164.       av_free(s->iv_frame[i].the_buf);

  165.     s->iv_frame[i].Ybuf = s->iv_frame[i].Ubuf = 

  166.       s->iv_frame[i].Vbuf = NULL;

  167.     s->iv_frame[i].the_buf = NULL;

  168.     s->iv_frame[i].the_buf_size = 0;

  169.     s->iv_frame[i].y_w = s->iv_frame[i].y_h = 0;

  170.     s->iv_frame[i].uv_w = s->iv_frame[i].uv_h = 0;

  171.   }

  172. 

  173.   av_free(s->ModPred);

  174.   av_free(s->corrector_type);

  175. }

  176. 

  177. /* ---------------------------------------------------------------------- */

  178. static unsigned long iv_decode_frame(Indeo3DecodeContext *s, 

  179.                                      unsigned char *buf, int buf_size) 

  180. {

  181.   unsigned int hdr_width, hdr_height,

  182.     chroma_width, chroma_height;

  183.   unsigned long fflags1, fflags2, fflags3, offs1, offs2, offs3, offs;

  184.   unsigned char *hdr_pos, *buf_pos;

  185. 

  186.   buf_pos = buf;

  187.   buf_pos += 18;

  188. 

  189.   fflags1 = le2me_16(*(uint16_t *)buf_pos);

  190.   buf_pos += 2;

  191.   fflags3 = le2me_32(*(uint32_t *)buf_pos);

  192.   buf_pos += 4;

  193.   fflags2 = *buf_pos++;

  194.   buf_pos += 3;

  195.   hdr_height = le2me_16(*(uint16_t *)buf_pos);

  196.   buf_pos += 2;

  197.   hdr_width = le2me_16(*(uint16_t *)buf_pos);

  198.   buf_pos += 2;

  199.   chroma_height = ((hdr_height >> 2) + 3) & 0x7ffc;

  200.   chroma_width = ((hdr_width >> 2) + 3) & 0x7ffc;

  201.   offs1 = le2me_32(*(uint32_t *)buf_pos);

  202.   buf_pos += 4;

  203.   offs2 = le2me_32(*(uint32_t *)buf_pos);

  204.   buf_pos += 4;

  205.   offs3 = le2me_32(*(uint32_t *)buf_pos);

  206.   buf_pos += 8;

  207.   hdr_pos = buf_pos;

  208.   if(fflags3 == 0x80) return 4;

  209. 

  210.   if(fflags1 & 0x200) {

  211.     s->cur_frame = s->iv_frame + 1;

  212.     s->ref_frame = s->iv_frame;

  213.   } else {

  214.     s->cur_frame = s->iv_frame;

  215.     s->ref_frame = s->iv_frame + 1;

  216.   }

  217. 

  218.   buf_pos = buf + 16 + offs1;

  219.   offs = le2me_32(*(uint32_t *)buf_pos);

  220.   buf_pos += 4;

  221. 

  222.   iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, hdr_width, 

  223.     hdr_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos, 

  224.     min(hdr_width, 160));

  225. 

  226.   buf_pos = buf + 16 + offs2;

  227.   offs = le2me_32(*(uint32_t *)buf_pos);

  228.   buf_pos += 4;

  229. 

  230.   iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width, 

  231.     chroma_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos, 

  232.     min(chroma_width, 40));

  233. 

  234.   buf_pos = buf + 16 + offs3;

  235.   offs = le2me_32(*(uint32_t *)buf_pos);

  236.   buf_pos += 4;

  237. 

  238.   iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width, 

  239.     chroma_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos, 

  240.     min(chroma_width, 40));

  241. 

  242.   return 8;

  243. }

  244. 

  245. typedef struct {

  246.   long xpos;

  247.   long ypos;

  248.   long width;

  249.   long height;

  250.   long split_flag;

  251.   long split_direction;

  252.   long usl7;

  253. } ustr_t;

  254. 

  255. /* ---------------------------------------------------------------------- */

  256. 

  257. #define LV1_CHECK(buf1,rle_v3,lv1,lp2)  \

  258.   if((lv1 & 0x80) != 0) {   \

  259.     if(rle_v3 != 0)         \

  260.       rle_v3 = 0;           \

  261.     else {                  \

  262.       rle_v3 = 1;           \

  263.       buf1 -= 2;            \

  264.     }                       \

  265.   }                         \

  266.   lp2 = 4;

  267. 

  268. 

  269. #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)  \

  270.   if(rle_v3 == 0) {         \

  271.     rle_v2 = *buf1;         \

  272.     rle_v1 = 1;             \

  273.     if(rle_v2 > 32) {       \

  274.       rle_v2 -= 32;         \

  275.       rle_v1 = 0;           \

  276.     }                       \

  277.     rle_v3 = 1;             \

  278.   }                         \

  279.   buf1--;

  280. 

  281. 

  282. #define LP2_CHECK(buf1,rle_v3,lp2)  \

  283.   if(lp2 == 0 && rle_v3 != 0)     \

  284.     rle_v3 = 0;           \

  285.   else {                  \

  286.     buf1--;               \

  287.     rle_v3 = 1;           \

  288.   }

  289. 

  290. 

  291. #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \

  292.   rle_v2--;             \

  293.   if(rle_v2 == 0) {     \

  294.     rle_v3 = 0;         \

  295.     buf1 += 2;          \

  296.   }                     \

  297.   lp2 = 4;

  298. 

  299. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

  300.   unsigned char *cur, unsigned char *ref, int width, int height, 

  301.   unsigned char *buf1, long fflags2, unsigned char *hdr,

  302.   unsigned char *buf2, int min_width_160)

  303. {

  304.   unsigned char bit_buf;

  305.   unsigned long bit_pos, lv, lv1, lv2;

  306.   long *width_tbl, width_tbl_arr[10];

  307.   char *ref_vectors;

  308.   unsigned char *cur_frm_pos, *ref_frm_pos, *cp, *cp2;

  309.   unsigned long *cur_lp, *ref_lp, *correction_lp[2], *correctionloworder_lp[2],

  310.     *correctionhighorder_lp[2];

  311.   unsigned short *correction_type_sp[2];

  312.   ustr_t strip_tbl[20], *strip;

  313.   int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,

  314.     rle_v1, rle_v2, rle_v3;

  315. 

  316.   bit_buf = 0;

  317.   ref_vectors = NULL;

  318. 

  319.   width_tbl = width_tbl_arr + 1;

  320.   i = (width < 0 ? width + 3 : width)/4;

  321.   for(j = -1; j < 8; j++) 

  322.     width_tbl[j] = i * j;

  323. 

  324.   strip = strip_tbl;

  325. 

  326.   for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);

  327. 

  328.   strip->ypos = strip->xpos = 0;

  329.   for(strip->width = min_width_160; width > strip->width; strip->width *= 2);

  330.   strip->height = height;

  331.   strip->split_direction = 0;

  332.   strip->split_flag = 0;

  333.   strip->usl7 = 0;

  334. 

  335.   bit_pos = 0;

  336. 

  337.   rle_v1 = rle_v2 = rle_v3 = 0;

  338. 

  339.   while(strip >= strip_tbl) {

  340.     if(bit_pos <= 0) {

  341.       bit_pos = 8;

  342.       bit_buf = *buf1++;

  343.     }

  344. 

  345.     bit_pos -= 2;

  346.     cmd = (bit_buf >> bit_pos) & 0x03;

  347. 

  348.     if(cmd == 0) {

  349.       strip++;

  350.       memcpy(strip, strip-1, sizeof(ustr_t));

  351.       strip->split_flag = 1;

  352.       strip->split_direction = 0;

  353.       strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);

  354.       continue;

  355.     } else if(cmd == 1) {

  356.       strip++;

  357.       memcpy(strip, strip-1, sizeof(ustr_t));

  358.       strip->split_flag = 1;

  359.       strip->split_direction = 1;

  360.       strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);

  361.       continue;

  362.     } else if(cmd == 2) {

  363.       if(strip->usl7 == 0) {

  364.         strip->usl7 = 1;

  365.         ref_vectors = NULL;

  366.         continue;

  367.       }

  368.     } else if(cmd == 3) {

  369.       if(strip->usl7 == 0) {

  370.         strip->usl7 = 1;

  371.         ref_vectors = buf2 + (*buf1 * 2);

  372.         buf1++;

  373.         continue;

  374.       }

  375.     }

  376. 

  377.     cur_frm_pos = cur + width * strip->ypos + strip->xpos;

  378. 

  379.     if((blks_width = strip->width) < 0) 

  380.       blks_width += 3;

  381.     blks_width >>= 2;

  382.     blks_height = strip->height;

  383. 

  384.     if(ref_vectors != NULL) {

  385.       ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +

  386.         ref_vectors[1] + strip->xpos;

  387.     } else 

  388.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  389. 

  390.     if(cmd == 2) {

  391.       if(bit_pos <= 0) {

  392.         bit_pos = 8;

  393.         bit_buf = *buf1++;

  394.       }

  395. 

  396.       bit_pos -= 2;

  397.       cmd = (bit_buf >> bit_pos) & 0x03;

  398. 

  399.       if(cmd == 0 || ref_vectors != NULL) {

  400.         for(lp1 = 0; lp1 < blks_width; lp1++) {

  401.           for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])

  402.             ((unsigned long *)cur_frm_pos)[j] = ((unsigned long *)ref_frm_pos)[j];

  403.           cur_frm_pos += 4;

  404.           ref_frm_pos += 4;

  405.         }

  406.       } else if(cmd != 1) 

  407.         return;

  408.     } else {

  409.       k = *buf1 >> 4;

  410.       j = *buf1 & 0x0f;

  411.       buf1++;

  412.       lv = j + fflags2;

  413. 

  414.       if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {

  415.         cp2 = s->ModPred + ((lv - 8) << 7);

  416.         cp = ref_frm_pos;

  417.         for(i = 0; i < blks_width << 2; i++) { *(cp++) = cp2[*cp >> 1]; }

  418.       }

  419. 

  420.       if(k == 1 || k == 4) {

  421.         lv = (hdr[j] & 0xf) + fflags2;

  422.         correction_type_sp[0] = s->corrector_type + (lv << 8);

  423.         correction_lp[0] = correction + (lv << 8);

  424.         lv = (hdr[j] >> 4) + fflags2;

  425.         correction_lp[1] = correction + (lv << 8);

  426.         correction_type_sp[1] = s->corrector_type + (lv << 8);

  427.       } else {

  428.         correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);

  429.         correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);

  430.         correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);

  431.         correction_lp[0] = correction_lp[1] = correction + (lv << 8);

  432.       }

  433. 

  434.       switch(k) {

  435.         case 1:

  436.         case 0:                    /********** CASE 0 **********/

  437.           for( ; blks_height > 0; blks_height -= 4) {

  438.             for(lp1 = 0; lp1 < blks_width; lp1++) {

  439.               for(lp2 = 0; lp2 < 4; ) {

  440.                 k = *buf1++;

  441.                 cur_lp = ((unsigned long *)cur_frm_pos) + width_tbl[lp2];

  442.                 ref_lp = ((unsigned long *)ref_frm_pos) + width_tbl[lp2];

  443. 

  444.                 switch(correction_type_sp[0][k]) {

  445.                   case 0:

  446.                     *cur_lp = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  447.                     lp2++;

  448.                     break;

  449.                   case 1:

  450.                     ((unsigned short *)cur_lp)[0] = ((((unsigned short *)(ref_lp))[0] >> 1)

  451.                       + correction_lp[lp2 & 0x01][*buf1++]) << 1;

  452.                     ((unsigned short *)cur_lp)[1] = ((((unsigned short *)(ref_lp))[1] >> 1)

  453.                       + correction_lp[lp2 & 0x01][k]) << 1;

  454.                     lp2++;

  455.                     break;

  456.                   case 2:

  457.                     if(lp2 == 0) {

  458.                       for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])

  459.                         cur_lp[j] = ref_lp[j];

  460.                       lp2 += 2;

  461.                     }

  462.                     break;

  463.                   case 3:

  464.                     if(lp2 < 2) {

  465.                       for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])

  466.                         cur_lp[j] = ref_lp[j];

  467.                       lp2 = 3;

  468.                     }

  469.                     break;

  470.                   case 8:

  471.                     if(lp2 == 0) {

  472.                       RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)

  473. 

  474.                       if(rle_v1 == 1 || ref_vectors != NULL) {

  475.                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  476.                           cur_lp[j] = ref_lp[j];

  477.                       }

  478. 

  479.                       RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)

  480.                       break;

  481.                     } else {

  482.                       rle_v1 = 1;

  483.                       rle_v2 = *buf1 - 1;

  484.                     }

  485.                   case 5:

  486.                       LP2_CHECK(buf1,rle_v3,lp2)

  487.                   case 4:

  488.                     for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])

  489.                       cur_lp[j] = ref_lp[j];

  490.                     lp2 = 4;

  491.                     break;

  492. 

  493.                   case 7:

  494.                     if(rle_v3 != 0) 

  495.                       rle_v3 = 0;

  496.                     else {

  497.                       buf1--;

  498.                       rle_v3 = 1;

  499.                     }

  500.                   case 6:

  501.                     if(ref_vectors != NULL) {

  502.                       for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  503.                         cur_lp[j] = ref_lp[j];

  504.                     }

  505.                     lp2 = 4;

  506.                     break;

  507. 

  508.                   case 9:

  509.                     lv1 = *buf1++;

  510.                     lv = (lv1 & 0x7F) << 1;

  511.                     lv += (lv << 8);

  512.                     lv += (lv << 16);

  513.                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  514.                       cur_lp[j] = lv;

  515. 

  516.                     LV1_CHECK(buf1,rle_v3,lv1,lp2)

  517.                     break;

  518.                   default: 

  519.                     return;

  520.                 }

  521.               }

  522. 

  523.               cur_frm_pos += 4;

  524.               ref_frm_pos += 4;

  525.             }

  526. 

  527.             cur_frm_pos += ((width - blks_width) * 4);

  528.             ref_frm_pos += ((width - blks_width) * 4);

  529.           }

  530.           break;

  531. 

  532.         case 4:

  533.         case 3:                    /********** CASE 3 **********/

  534.           if(ref_vectors != NULL) 

  535.             return;

  536.           flag1 = 1;

  537. 

  538.           for( ; blks_height > 0; blks_height -= 8) {

  539.             for(lp1 = 0; lp1 < blks_width; lp1++) {

  540.               for(lp2 = 0; lp2 < 4; ) {

  541.                 k = *buf1++;

  542. 

  543.                 cur_lp = ((unsigned long *)cur_frm_pos) + width_tbl[lp2 * 2];

  544.                 ref_lp = ((unsigned long *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];

  545. 

  546.                 switch(correction_type_sp[lp2 & 0x01][k]) {

  547.                   case 0:

  548.                     cur_lp[width_tbl[1]] = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  549.                     if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)

  550.                       cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  551.                     else

  552.                       cur_lp[0] = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  553.                     lp2++;

  554.                     break;

  555. 

  556.                   case 1:

  557.                     ((unsigned short *)cur_lp)[width_tbl[2]] =

  558.                       ((((unsigned short *)ref_lp)[0] >> 1) + correction_lp[lp2 & 0x01][*buf1++]) << 1;

  559.                     ((unsigned short *)cur_lp)[width_tbl[2]+1] =

  560.                       ((((unsigned short *)ref_lp)[1] >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  561.                     if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)

  562.                       cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  563.                     else

  564.                       cur_lp[0] = cur_lp[width_tbl[1]];

  565.                     lp2++;

  566.                     break;

  567. 

  568.                   case 2:

  569.                     if(lp2 == 0) {

  570.                       for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  571.                         cur_lp[j] = *ref_lp;

  572.                       lp2 += 2;

  573.                     }

  574.                     break;

  575. 

  576.                   case 3:

  577.                     if(lp2 < 2) {

  578.                       for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])

  579.                         cur_lp[j] = *ref_lp;

  580.                       lp2 = 3;

  581.                     }

  582.                     break;

  583. 

  584.                   case 6:

  585.                     lp2 = 4;

  586.                     break;

  587. 

  588.                   case 7:

  589.                     if(rle_v3 != 0) 

  590.                       rle_v3 = 0;

  591.                     else {

  592.                       buf1--;

  593.                       rle_v3 = 1;

  594.                     }

  595.                     lp2 = 4;

  596.                     break;

  597. 

  598.                   case 8:

  599.                     if(lp2 == 0) {

  600.                       RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)

  601. 

  602.                       if(rle_v1 == 1) {

  603.                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])

  604.                           cur_lp[j] = ref_lp[j];

  605.                       }

  606. 

  607.                       RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)

  608.                       break;

  609.                     } else {

  610.                       rle_v2 = (*buf1) - 1;

  611.                       rle_v1 = 1;

  612.                     }

  613.                   case 5:

  614.                       LP2_CHECK(buf1,rle_v3,lp2)

  615.                   case 4:

  616.                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])

  617.                       cur_lp[j] = *ref_lp;

  618.                     lp2 = 4;

  619.                     break;

  620. 

  621.                   case 9:

  622.                     fprintf(stderr, "UNTESTED.\n");

  623.                     lv1 = *buf1++;

  624.                     lv = (lv1 & 0x7F) << 1;

  625.                     lv += (lv << 8);

  626.                     lv += (lv << 16);

  627. 

  628.                     for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  629.                       cur_lp[j] = lv;

  630. 

  631.                     LV1_CHECK(buf1,rle_v3,lv1,lp2)

  632.                     break;

  633. 

  634.                   default: 

  635.                     return;

  636.                 }

  637.               }

  638. 

  639.               cur_frm_pos += 4;

  640.             }

  641. 

  642.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  643.             flag1 = 0;

  644.           }

  645.           break;

  646. 

  647.         case 10:                    /********** CASE 10 **********/

  648.           if(ref_vectors == NULL) {

  649.             flag1 = 1;

  650. 

  651.             for( ; blks_height > 0; blks_height -= 8) {

  652.               for(lp1 = 0; lp1 < blks_width; lp1 += 2) {

  653.                 for(lp2 = 0; lp2 < 4; ) {

  654.                   k = *buf1++;

  655.                   cur_lp = ((unsigned long *)cur_frm_pos) + width_tbl[lp2 * 2];

  656.                   ref_lp = ((unsigned long *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];

  657.                   lv1 = ref_lp[0];

  658.                   lv2 = ref_lp[1];

  659.                   if(lp2 == 0 && flag1 != 0) {

  660.                     lv1 = lv1 & 0x00FF00FF;

  661.                     lv1 = (lv1 << 8) | lv1;

  662.                     lv2 = lv2 & 0x00FF00FF;

  663.                     lv2 = (lv2 << 8) | lv2;

  664.                   }

  665. 

  666.                   switch(correction_type_sp[lp2 & 0x01][k]) {

  667.                     case 0:

  668.                       cur_lp[width_tbl[1]] = ((lv1 >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1;

  669.                       cur_lp[width_tbl[1]+1] = ((lv2 >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1;

  670.                       if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {

  671.                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  672.                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  673.                       } else {

  674.                         cur_lp[0] = cur_lp[width_tbl[1]];

  675.                         cur_lp[1] = cur_lp[width_tbl[1]+1];

  676.                       }

  677.                       lp2++;

  678.                       break;

  679. 

  680.                     case 1:

  681.                       cur_lp[width_tbl[1]] = ((lv1 >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1++]) << 1;

  682.                       cur_lp[width_tbl[1]+1] = ((lv2 >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1;

  683.                       if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {

  684.                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  685.                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  686.                       } else {

  687.                         cur_lp[0] = cur_lp[width_tbl[1]];

  688.                         cur_lp[1] = cur_lp[width_tbl[1]+1];

  689.                       }

  690.                       lp2++;

  691.                       break;

  692. 

  693.                     case 2:

  694.                       if(lp2 == 0) {

  695.                         if(flag1 != 0) {

  696.                           for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {

  697.                             cur_lp[j] = lv1;

  698.                             cur_lp[j+1] = lv2;

  699.                           }

  700.                           cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  701.                           cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  702.                         } else {

  703.                           for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {

  704.                             cur_lp[j] = lv1;

  705.                             cur_lp[j+1] = lv2;

  706.                           }

  707.                         }

  708.                         lp2 += 2;

  709.                       }

  710.                       break;

  711. 

  712.                     case 3:

  713.                       if(lp2 < 2) {

  714.                         if(lp2 == 0 && flag1 != 0) {

  715.                           for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {

  716.                             cur_lp[j] = lv1;

  717.                             cur_lp[j+1] = lv2;

  718.                           }

  719.                           cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  720.                           cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  721.                         } else {

  722.                           for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {

  723.                             cur_lp[j] = lv1;

  724.                             cur_lp[j+1] = lv2;

  725.                           }

  726.                         }

  727.                         lp2 = 3;

  728.                       }

  729.                       break;

  730. 

  731.                     case 8:

  732.                       if(lp2 == 0) {

  733.                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)

  734.                         if(rle_v1 == 1) {

  735.                           if(flag1 != 0) {

  736.                             for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {

  737.                               cur_lp[j] = lv1;

  738.                               cur_lp[j+1] = lv2;

  739.                             }

  740.                             cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  741.                             cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  742.                           } else {

  743.                             for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {

  744.                               cur_lp[j] = lv1;

  745.                               cur_lp[j+1] = lv2;

  746.                             }

  747.                           }

  748.                         }

  749.                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)

  750.                         break;

  751.                       } else {

  752.                         rle_v1 = 1;

  753.                         rle_v2 = (*buf1) - 1;

  754.                       }

  755.                     case 5:

  756.                         LP2_CHECK(buf1,rle_v3,lp2)

  757.                     case 4:

  758.                       if(lp2 == 0 && flag1 != 0) {

  759.                         for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {

  760.                           cur_lp[j] = lv1;

  761.                           cur_lp[j+1] = lv2;

  762.                         }

  763.                         cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;

  764.                         cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;

  765.                       } else {

  766.                         for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {

  767.                           cur_lp[j] = lv1;

  768.                           cur_lp[j+1] = lv2;

  769.                         }

  770.                       }

  771.                       lp2 = 4;

  772.                       break;

  773. 

  774.                     case 6:

  775.                       lp2 = 4;

  776.                       break;

  777. 

  778.                     case 7:

  779.                       if(lp2 == 0) {

  780.                         if(rle_v3 != 0) 

  781.                           rle_v3 = 0;

  782.                         else {

  783.                           buf1--;

  784.                           rle_v3 = 1;

  785.                         }

  786.                         lp2 = 4;

  787.                       }

  788.                       break;

  789. 

  790.                     case 9:

  791.                       fprintf(stderr, "UNTESTED.\n");

  792.                       lv1 = *buf1;

  793.                       lv = (lv1 & 0x7F) << 1;

  794.                       lv += (lv << 8);

  795.                       lv += (lv << 16);

  796.                       for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])

  797.                         cur_lp[j] = lv;

  798.                       LV1_CHECK(buf1,rle_v3,lv1,lp2)

  799.                       break;

  800. 

  801.                     default: 

  802.                       return;

  803.                   }

  804.                 }

  805. 

  806.                 cur_frm_pos += 8;

  807.               }

  808. 

  809.               cur_frm_pos += (((width * 2) - blks_width) * 4);

  810.               flag1 = 0;

  811.             }

  812.           } else {

  813.             for( ; blks_height > 0; blks_height -= 8) {

  814.               for(lp1 = 0; lp1 < blks_width; lp1 += 2) {

  815.                 for(lp2 = 0; lp2 < 4; ) {

  816.                   k = *buf1++;

  817.                   cur_lp = ((unsigned long *)cur_frm_pos) + width_tbl[lp2 * 2];

  818.                   ref_lp = ((unsigned long *)ref_frm_pos) + width_tbl[lp2 * 2];

  819. 

  820.                   switch(correction_type_sp[lp2 & 0x01][k]) {

  821.                     case 0:

  822.                       lv1 = correctionloworder_lp[lp2 & 0x01][k];

  823.                       lv2 = correctionhighorder_lp[lp2 & 0x01][k];

  824.                       cur_lp[0] = ((ref_lp[0] >> 1) + lv1) << 1;

  825.                       cur_lp[1] = ((ref_lp[1] >> 1) + lv2) << 1;

  826.                       cur_lp[width_tbl[1]] = ((ref_lp[width_tbl[1]] >> 1) + lv1) << 1;

  827.                       cur_lp[width_tbl[1]+1] = ((ref_lp[width_tbl[1]+1] >> 1) + lv2) << 1;

  828.                       lp2++;

  829.                       break;

  830. 

  831.                     case 1:

  832.                       lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];

  833.                       lv2 = correctionloworder_lp[lp2 & 0x01][k];

  834.                       cur_lp[0] = ((ref_lp[0] >> 1) + lv1) << 1;

  835.                       cur_lp[1] = ((ref_lp[1] >> 1) + lv2) << 1;

  836.                       cur_lp[width_tbl[1]] = ((ref_lp[width_tbl[1]] >> 1) + lv1) << 1;

  837.                       cur_lp[width_tbl[1]+1] = ((ref_lp[width_tbl[1]+1] >> 1) + lv2) << 1;

  838.                       lp2++;

  839.                       break;

  840. 

  841.                     case 2:

  842.                       if(lp2 == 0) {

  843.                         for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {

  844.                           cur_lp[j] = ref_lp[j];

  845.                           cur_lp[j+1] = ref_lp[j+1];

  846.                         }

  847.                         lp2 += 2;

  848.                       }

  849.                       break;

  850. 

  851.                     case 3:

  852.                       if(lp2 < 2) {

  853.                         for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {

  854.                           cur_lp[j] = ref_lp[j];

  855.                           cur_lp[j+1] = ref_lp[j+1];

  856.                         }

  857.                         lp2 = 3;

  858.                       }

  859.                       break;

  860. 

  861.                     case 8:

  862.                       if(lp2 == 0) {

  863.                         RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)

  864.                         for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {

  865.                           ((unsigned long *)cur_frm_pos)[j] = ((unsigned long *)ref_frm_pos)[j];

  866.                           ((unsigned long *)cur_frm_pos)[j+1] = ((unsigned long *)ref_frm_pos)[j+1];

  867.                         }

  868.                         RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)

  869.                         break;

  870.                       } else {

  871.                         rle_v1 = 1;

  872.                         rle_v2 = (*buf1) - 1;

  873.                       }

  874.                     case 5:

  875.                     case 7:

  876.                         LP2_CHECK(buf1,rle_v3,lp2)

  877.                     case 6:

  878.                     case 4:

  879.                       for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {

  880.                         cur_lp[j] = ref_lp[j];

  881.                         cur_lp[j+1] = ref_lp[j+1];

  882.                       }

  883.                       lp2 = 4;

  884.                       break;

  885. 

  886.                     case 9:

  887.                       fprintf(stderr, "UNTESTED.\n");

  888.                       lv1 = *buf1;

  889.                       lv = (lv1 & 0x7F) << 1;

  890.                       lv += (lv << 8);

  891.                       lv += (lv << 16);

  892.                       for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])

  893.                         ((unsigned long *)cur_frm_pos)[j] = ((unsigned long *)cur_frm_pos)[j+1] = lv;

  894.                       LV1_CHECK(buf1,rle_v3,lv1,lp2)

  895.                       break;

  896. 

  897.                     default: 

  898.                       return;

  899.                   }

  900.                 }

  901. 

  902.                 cur_frm_pos += 8;

  903.                 ref_frm_pos += 8;

  904.               }

  905. 

  906.               cur_frm_pos += (((width * 2) - blks_width) * 4);

  907.               ref_frm_pos += (((width * 2) - blks_width) * 4);

  908.             }

  909.           }

  910.           break;

  911. 

  912.         case 11:                    /********** CASE 11 **********/

  913.           if(ref_vectors == NULL) 

  914.             return;

  915. 

  916.           for( ; blks_height > 0; blks_height -= 8) {

  917.             for(lp1 = 0; lp1 < blks_width; lp1++) {

  918.               for(lp2 = 0; lp2 < 4; ) {

  919.                 k = *buf1++;

  920.                 cur_lp = ((unsigned long *)cur_frm_pos) + width_tbl[lp2 * 2];

  921.                 ref_lp = ((unsigned long *)ref_frm_pos) + width_tbl[lp2 * 2];

  922. 

  923.                 switch(correction_type_sp[lp2 & 0x01][k]) {

  924.                   case 0:

  925.                     cur_lp[0] = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  926.                     cur_lp[width_tbl[1]] = ((ref_lp[width_tbl[1]] >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  927.                     lp2++;

  928.                     break;

  929. 

  930.                   case 1:

  931.                     lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);

  932.                     lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);

  933.                     ((unsigned short *)cur_lp)[0] = ((((unsigned short *)ref_lp)[0] >> 1) + lv1) << 1;

  934.                     ((unsigned short *)cur_lp)[1] = ((((unsigned short *)ref_lp)[1] >> 1) + lv2) << 1;

  935.                     ((unsigned short *)cur_lp)[width_tbl[2]] = ((((unsigned short *)ref_lp)[width_tbl[2]] >> 1) + lv1) << 1;

  936.                     ((unsigned short *)cur_lp)[width_tbl[2]+1] = ((((unsigned short *)ref_lp)[width_tbl[2]+1] >> 1) + lv2) << 1;

  937.                     lp2++;

  938.                     break;

  939. 

  940.                   case 2:

  941.                     if(lp2 == 0) {

  942.                       for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  943.                         cur_lp[j] = ref_lp[j];

  944.                       lp2 += 2;

  945.                     }

  946.                     break;

  947. 

  948.                   case 3:

  949.                     if(lp2 < 2) {

  950.                       for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])

  951.                         cur_lp[j] = ref_lp[j];

  952.                       lp2 = 3;

  953.                     }

  954.                     break;

  955. 

  956.                   case 8:

  957.                     if(lp2 == 0) {

  958.                       RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)

  959. 

  960.                       for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])

  961.                         cur_lp[j] = ref_lp[j];

  962. 

  963.                       RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)

  964.                       break;

  965.                     } else {

  966.                       rle_v1 = 1;

  967.                       rle_v2 = (*buf1) - 1;

  968.                     }

  969.                   case 5:

  970.                   case 7:

  971.                       LP2_CHECK(buf1,rle_v3,lp2)

  972.                   case 4:

  973.                   case 6:

  974.                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])

  975.                       cur_lp[j] = ref_lp[j];

  976.                     lp2 = 4;

  977.                     break;

  978. 

  979.                 case 9:

  980.                   fprintf(stderr, "UNTESTED.\n");

  981.                   lv1 = *buf1++;

  982.                   lv = (lv1 & 0x7F) << 1;

  983.                   lv += (lv << 8);

  984.                   lv += (lv << 16);

  985.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  986.                     cur_lp[j] = lv;

  987.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  988.                   break;

  989. 

  990.                   default: 

  991.                     return;

  992.                 }

  993.               }

  994. 

  995.               cur_frm_pos += 4;

  996.               ref_frm_pos += 4;

  997.             }

  998. 

  999.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1000.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1001.           }

  1002.           break;

  1003. 

  1004.         default: 

  1005.           return;

  1006.       }

  1007.     }

  1008. 

  1009.     if(strip < strip_tbl) 

  1010.       return;

  1011. 

  1012.     for( ; strip >= strip_tbl; strip--) {

  1013.       if(strip->split_flag != 0) {

  1014.         strip->split_flag = 0;

  1015.         strip->usl7 = (strip-1)->usl7;

  1016. 

  1017.         if(strip->split_direction) {

  1018.           strip->xpos += strip->width;

  1019.           strip->width = (strip-1)->width - strip->width;

  1020.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1021.             strip->width = width - strip->xpos;

  1022.         } else {

  1023.           strip->ypos += strip->height;

  1024.           strip->height = (strip-1)->height - strip->height;

  1025.         }

  1026.         break;

  1027.       }

  1028.     }

  1029.   }

  1030. }

  1031. 

  1032. static int indeo3_decode_init(AVCodecContext *avctx)

  1033. {

  1034.     Indeo3DecodeContext *s = avctx->priv_data;

  1035. 

  1036.     s->avctx = avctx;

  1037.     s->width = avctx->width;

  1038.     s->height = avctx->height;

  1039.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1040.     avctx->has_b_frames = 0;

  1041. 

  1042.     build_modpred(s);

  1043.     iv_alloc_frames(s);

  1044. 

  1045.     return 0;

  1046. }

  1047. 

  1048. static int indeo3_decode_frame(AVCodecContext *avctx,

  1049.                                void *data, int *data_size,

  1050.                                unsigned char *buf, int buf_size)

  1051. {

  1052.     Indeo3DecodeContext *s=avctx->priv_data;

  1053.     unsigned char *src, *dest;

  1054.     int y;

  1055. 

  1056.     iv_decode_frame(s, buf, buf_size);

  1057. 

  1058.     if(s->frame.data[0])

  1059.         avctx->release_buffer(avctx, &s->frame);

  1060. 

  1061.     s->frame.reference = 0;

  1062.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1063.         fprintf(stderr, "get_buffer() failed\n");

  1064.         return -1;

  1065.     }

  1066. 

  1067.     src = s->cur_frame->Ybuf;

  1068.     dest = s->frame.data[0];

  1069.     for (y = 0; y < s->height; y++) {

  1070.       memcpy(dest, src, s->cur_frame->y_w);

  1071.       src += s->cur_frame->y_w;

  1072.       dest += s->frame.linesize[0];

  1073.     }

  1074. 

  1075.     src = s->cur_frame->Ubuf;

  1076.     dest = s->frame.data[1];

  1077.     for (y = 0; y < s->height / 4; y++) {

  1078.       memcpy(dest, src, s->cur_frame->uv_w);

  1079.       src += s->cur_frame->uv_w;

  1080.       dest += s->frame.linesize[1];

  1081.     }

  1082. 

  1083.     src = s->cur_frame->Vbuf;

  1084.     dest = s->frame.data[2];

  1085.     for (y = 0; y < s->height / 4; y++) {

  1086.       memcpy(dest, src, s->cur_frame->uv_w);

  1087.       src += s->cur_frame->uv_w;

  1088.       dest += s->frame.linesize[2];

  1089.     }

  1090. 

  1091.     *data_size=sizeof(AVFrame);

  1092.     *(AVFrame*)data= s->frame;

  1093. 

  1094.     return buf_size;

  1095. }

  1096. 

  1097. static int indeo3_decode_end(AVCodecContext *avctx)

  1098. {

  1099.     Indeo3DecodeContext *s = avctx->priv_data;

  1100. 

  1101.     iv_free_func(s);

  1102. 

  1103.     return 0;

  1104. }

  1105. 

  1106. AVCodec indeo3_decoder = {

  1107.     "indeo3",

  1108.     CODEC_TYPE_VIDEO,

  1109.     CODEC_ID_INDEO3,

  1110.     sizeof(Indeo3DecodeContext),

  1111.     indeo3_decode_init,

  1112.     NULL,

  1113.     indeo3_decode_end,

  1114.     indeo3_decode_frame,

  1115.     0,

  1116.     NULL

  1117. };