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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. #include "bswap.h"

  30. 

  31. #include "indeo3data.h"

  32. 

  33. typedef struct

  34. {

  35.   unsigned char *Ybuf;

  36.   unsigned char *Ubuf;

  37.   unsigned char *Vbuf;

  38.   unsigned char *the_buf;

  39.   unsigned int the_buf_size;

  40.   unsigned short y_w, y_h;

  41.   unsigned short uv_w, uv_h;

  42. } YUVBufs;

  43. 

  44. typedef struct Indeo3DecodeContext {

  45.     AVCodecContext *avctx;

  46.     int width, height;

  47.     AVFrame frame;

  48. 

  49.     YUVBufs iv_frame[2];

  50.     YUVBufs *cur_frame;

  51.     YUVBufs *ref_frame;

  52. 

  53.     unsigned char *ModPred;

  54.     unsigned short *corrector_type;

  55. } Indeo3DecodeContext;

  56. 

  57. static int corrector_type_0[24] = {

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

  59.   195, 159, 133, 115, 101,  93,  87,  77,

  60.   128,  79,  79,  79,  79,  79,  79,  79

  61. };

  62. 

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

  64. 

  65. static void build_modpred(Indeo3DecodeContext *s) 

  66. {

  67.   int i, j;

  68. 

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

  70. 

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

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

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

  74. 				 ? 236 : 2*((i + 2) - ((i + 1) % 3)));

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

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

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

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

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

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

  81.   }

  82. 

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

  84. 

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

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

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

  88. 				? 1 : ((j < 248 || (i == 16 && j == 248))

  89. 				       ? 0 : corrector_type_2[j - 248]);

  90.     }

  91.   }

  92. }

  93. 

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

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

  96.   long fflags2, unsigned char *hdr,

  97.   unsigned char *buf2, int min_width_160);

  98. 

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

  100. 

  101. /* ---------------------------------------------------------------------- */

  102. static void iv_alloc_frames(Indeo3DecodeContext *s) 

  103. {

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

  105.     chroma_pixels, bufsize, i;

  106. 

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

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

  109. 

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

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

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

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

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

  115. 

  116.   chroma_width = luma_width >> 2;

  117.   chroma_height = luma_height >> 2;

  118.   luma_pixels = luma_width * luma_height;

  119.   chroma_pixels = chroma_width * chroma_height;

  120. 

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

  122.     (chroma_pixels + chroma_width) * 4;

  123. 

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

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

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

  127.     return;

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

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

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

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

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

  133. 

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

  135.   i = luma_pixels + luma_width * 2;

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

  137.   i += (luma_pixels + luma_width);

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

  139.   i += (chroma_pixels + chroma_width);

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

  141.   i += (chroma_pixels + chroma_width);

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

  143.   i += (chroma_pixels + chroma_width);

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

  145. 

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

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

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

  149. 

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

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

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

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

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

  155.   }

  156. }

  157. 

  158. /* ---------------------------------------------------------------------- */

  159. static void iv_free_func(Indeo3DecodeContext *s) 

  160. {

  161.   int i;

  162. 

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

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

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

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

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

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

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

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

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

  172.   }

  173. 

  174.   av_free(s->ModPred);

  175.   av_free(s->corrector_type);

  176. }

  177. 

  178. /* ---------------------------------------------------------------------- */

  179. static unsigned long iv_decode_frame(Indeo3DecodeContext *s, 

  180.                                      unsigned char *buf, int buf_size) 

  181. {

  182.   unsigned int hdr_width, hdr_height,

  183.     chroma_width, chroma_height;

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

  185.   unsigned char *hdr_pos, *buf_pos;

  186. 

  187.   buf_pos = buf;

  188.   buf_pos += 18;

  189. 

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

  191.   buf_pos += 2;

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

  193.   buf_pos += 4;

  194.   fflags2 = *buf_pos++;

  195.   buf_pos += 3;

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

  197.   buf_pos += 2;

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

  199.   buf_pos += 2;

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

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

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

  203.   buf_pos += 4;

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

  205.   buf_pos += 4;

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

  207.   buf_pos += 8;

  208.   hdr_pos = buf_pos;

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

  210. 

  211.   if(fflags1 & 0x200) {

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

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

  214.   } else {

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

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

  217.   }

  218. 

  219.   buf_pos = buf + 16 + offs1;

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

  221.   buf_pos += 4;

  222. 

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

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

  225.     min(hdr_width, 160));

  226. 

  227.   buf_pos = buf + 16 + offs2;

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

  229.   buf_pos += 4;

  230. 

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

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

  233.     min(chroma_width, 40));

  234. 

  235.   buf_pos = buf + 16 + offs3;

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

  237.   buf_pos += 4;

  238. 

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

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

  241.     min(chroma_width, 40));

  242. 

  243.   return 8;

  244. }

  245. 

  246. typedef struct {

  247.   long xpos;

  248.   long ypos;

  249.   long width;

  250.   long height;

  251.   long split_flag;

  252.   long split_direction;

  253.   long usl7;

  254. } ustr_t;

  255. 

  256. /* ---------------------------------------------------------------------- */

  257. 

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

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

  260.     if(rle_v3 != 0)         \

  261.       rle_v3 = 0;           \

  262.     else {                  \

  263.       rle_v3 = 1;           \

  264.       buf1 -= 2;            \

  265.     }                       \

  266.   }                         \

  267.   lp2 = 4;

  268. 

  269. 

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

  271.   if(rle_v3 == 0) {         \

  272.     rle_v2 = *buf1;         \

  273.     rle_v1 = 1;             \

  274.     if(rle_v2 > 32) {       \

  275.       rle_v2 -= 32;         \

  276.       rle_v1 = 0;           \

  277.     }                       \

  278.     rle_v3 = 1;             \

  279.   }                         \

  280.   buf1--;

  281. 

  282. 

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

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

  285.     rle_v3 = 0;           \

  286.   else {                  \

  287.     buf1--;               \

  288.     rle_v3 = 1;           \

  289.   }

  290. 

  291. 

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

  293.   rle_v2--;             \

  294.   if(rle_v2 == 0) {     \

  295.     rle_v3 = 0;         \

  296.     buf1 += 2;          \

  297.   }                     \

  298.   lp2 = 4;

  299. 

  300. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  303.   unsigned char *buf2, int min_width_160)

  304. {

  305.   unsigned char bit_buf;

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

  307.   long *width_tbl, width_tbl_arr[10];

  308.   char *ref_vectors;

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

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

  311.     *correctionhighorder_lp[2];

  312.   unsigned short *correction_type_sp[2];

  313.   ustr_t strip_tbl[20], *strip;

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

  315.     rle_v1, rle_v2, rle_v3;

  316. 

  317.   bit_buf = 0;

  318.   ref_vectors = NULL;

  319. 

  320.   width_tbl = width_tbl_arr + 1;

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

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

  323.     width_tbl[j] = i * j;

  324. 

  325.   strip = strip_tbl;

  326. 

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

  328. 

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

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

  331.   strip->height = height;

  332.   strip->split_direction = 0;

  333.   strip->split_flag = 0;

  334.   strip->usl7 = 0;

  335. 

  336.   bit_pos = 0;

  337. 

  338.   rle_v1 = rle_v2 = rle_v3 = 0;

  339. 

  340.   while(strip >= strip_tbl) {

  341.     if(bit_pos <= 0) {

  342.       bit_pos = 8;

  343.       bit_buf = *buf1++;

  344.     }

  345. 

  346.     bit_pos -= 2;

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

  348. 

  349.     if(cmd == 0) {

  350.       strip++;

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

  352.       strip->split_flag = 1;

  353.       strip->split_direction = 0;

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

  355.       continue;

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

  357.       strip++;

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

  359.       strip->split_flag = 1;

  360.       strip->split_direction = 1;

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

  362.       continue;

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

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

  365.         strip->usl7 = 1;

  366.         ref_vectors = NULL;

  367.         continue;

  368.       }

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

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

  371.         strip->usl7 = 1;

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

  373.         buf1++;

  374.         continue;

  375.       }

  376.     }

  377. 

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

  379. 

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

  381.       blks_width += 3;

  382.     blks_width >>= 2;

  383.     blks_height = strip->height;

  384. 

  385.     if(ref_vectors != NULL) {

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

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

  388.     } else 

  389.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  390. 

  391.     if(cmd == 2) {

  392.       if(bit_pos <= 0) {

  393.         bit_pos = 8;

  394.         bit_buf = *buf1++;

  395.       }

  396. 

  397.       bit_pos -= 2;

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

  399. 

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

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

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

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

  404.           cur_frm_pos += 4;

  405.           ref_frm_pos += 4;

  406.         }

  407.       } else if(cmd != 1) 

  408.         return;

  409.     } else {

  410.       k = *buf1 >> 4;

  411.       j = *buf1 & 0x0f;

  412.       buf1++;

  413.       lv = j + fflags2;

  414. 

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

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

  417.         cp = ref_frm_pos;

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

  419.       }

  420. 

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

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

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

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

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

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

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

  428.       } else {

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

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

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

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

  433.       }

  434. 

  435.       switch(k) {

  436.         case 1:

  437.         case 0:                    /********** CASE 0 **********/

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

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

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

  441.                 k = *buf1++;

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

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

  444. 

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

  446.                   case 0:

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

  448.                     lp2++;

  449.                     break;

  450.                   case 1:

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

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

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

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

  455.                     lp2++;

  456.                     break;

  457.                   case 2:

  458.                     if(lp2 == 0) {

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

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

  461.                       lp2 += 2;

  462.                     }

  463.                     break;

  464.                   case 3:

  465.                     if(lp2 < 2) {

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

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

  468.                       lp2 = 3;

  469.                     }

  470.                     break;

  471.                   case 8:

  472.                     if(lp2 == 0) {

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

  474. 

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

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

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

  478.                       }

  479. 

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

  481.                       break;

  482.                     } else {

  483.                       rle_v1 = 1;

  484.                       rle_v2 = *buf1 - 1;

  485.                     }

  486.                   case 5:

  487.                       LP2_CHECK(buf1,rle_v3,lp2)

  488.                   case 4:

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

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

  491.                     lp2 = 4;

  492.                     break;

  493. 

  494.                   case 7:

  495.                     if(rle_v3 != 0) 

  496.                       rle_v3 = 0;

  497.                     else {

  498.                       buf1--;

  499.                       rle_v3 = 1;

  500.                     }

  501.                   case 6:

  502.                     if(ref_vectors != NULL) {

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

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

  505.                     }

  506.                     lp2 = 4;

  507.                     break;

  508. 

  509.                   case 9:

  510.                     lv1 = *buf1++;

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

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

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

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

  515.                       cur_lp[j] = lv;

  516. 

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

  518.                     break;

  519.                   default: 

  520.                     return;

  521.                 }

  522.               }

  523. 

  524.               cur_frm_pos += 4;

  525.               ref_frm_pos += 4;

  526.             }

  527. 

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

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

  530.           }

  531.           break;

  532. 

  533.         case 4:

  534.         case 3:                    /********** CASE 3 **********/

  535.           if(ref_vectors != NULL) 

  536.             return;

  537.           flag1 = 1;

  538. 

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

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

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

  542.                 k = *buf1++;

  543. 

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

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

  546. 

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

  548.                   case 0:

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

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

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

  552.                     else

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

  554.                     lp2++;

  555.                     break;

  556. 

  557.                   case 1:

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

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

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

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

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

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

  564.                     else

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

  566.                     lp2++;

  567.                     break;

  568. 

  569.                   case 2:

  570.                     if(lp2 == 0) {

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

  572.                         cur_lp[j] = *ref_lp;

  573.                       lp2 += 2;

  574.                     }

  575.                     break;

  576. 

  577.                   case 3:

  578.                     if(lp2 < 2) {

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

  580.                         cur_lp[j] = *ref_lp;

  581.                       lp2 = 3;

  582.                     }

  583.                     break;

  584. 

  585.                   case 6:

  586.                     lp2 = 4;

  587.                     break;

  588. 

  589.                   case 7:

  590.                     if(rle_v3 != 0) 

  591.                       rle_v3 = 0;

  592.                     else {

  593.                       buf1--;

  594.                       rle_v3 = 1;

  595.                     }

  596.                     lp2 = 4;

  597.                     break;

  598. 

  599.                   case 8:

  600.                     if(lp2 == 0) {

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

  602. 

  603.                       if(rle_v1 == 1) {

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

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

  606.                       }

  607. 

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

  609.                       break;

  610.                     } else {

  611.                       rle_v2 = (*buf1) - 1;

  612.                       rle_v1 = 1;

  613.                     }

  614.                   case 5:

  615.                       LP2_CHECK(buf1,rle_v3,lp2)

  616.                   case 4:

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

  618.                       cur_lp[j] = *ref_lp;

  619.                     lp2 = 4;

  620.                     break;

  621. 

  622.                   case 9:

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

  624.                     lv1 = *buf1++;

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

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

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

  628. 

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

  630.                       cur_lp[j] = lv;

  631. 

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

  633.                     break;

  634. 

  635.                   default: 

  636.                     return;

  637.                 }

  638.               }

  639. 

  640.               cur_frm_pos += 4;

  641.             }

  642. 

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

  644.             flag1 = 0;

  645.           }

  646.           break;

  647. 

  648.         case 10:                    /********** CASE 10 **********/

  649.           if(ref_vectors == NULL) {

  650.             flag1 = 1;

  651. 

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

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

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

  655.                   k = *buf1++;

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

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

  658.                   lv1 = ref_lp[0];

  659.                   lv2 = ref_lp[1];

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

  661.                     lv1 = lv1 & 0x00FF00FF;

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

  663.                     lv2 = lv2 & 0x00FF00FF;

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

  665.                   }

  666. 

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

  668.                     case 0:

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

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

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

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

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

  674.                       } else {

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

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

  677.                       }

  678.                       lp2++;

  679.                       break;

  680. 

  681.                     case 1:

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

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

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

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

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

  687.                       } else {

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

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

  690.                       }

  691.                       lp2++;

  692.                       break;

  693. 

  694.                     case 2:

  695.                       if(lp2 == 0) {

  696.                         if(flag1 != 0) {

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

  698.                             cur_lp[j] = lv1;

  699.                             cur_lp[j+1] = lv2;

  700.                           }

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

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

  703.                         } else {

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

  705.                             cur_lp[j] = lv1;

  706.                             cur_lp[j+1] = lv2;

  707.                           }

  708.                         }

  709.                         lp2 += 2;

  710.                       }

  711.                       break;

  712. 

  713.                     case 3:

  714.                       if(lp2 < 2) {

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

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

  717.                             cur_lp[j] = lv1;

  718.                             cur_lp[j+1] = lv2;

  719.                           }

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

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

  722.                         } else {

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

  724.                             cur_lp[j] = lv1;

  725.                             cur_lp[j+1] = lv2;

  726.                           }

  727.                         }

  728.                         lp2 = 3;

  729.                       }

  730.                       break;

  731. 

  732.                     case 8:

  733.                       if(lp2 == 0) {

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

  735.                         if(rle_v1 == 1) {

  736.                           if(flag1 != 0) {

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

  738.                               cur_lp[j] = lv1;

  739.                               cur_lp[j+1] = lv2;

  740.                             }

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

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

  743.                           } else {

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

  745.                               cur_lp[j] = lv1;

  746.                               cur_lp[j+1] = lv2;

  747.                             }

  748.                           }

  749.                         }

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

  751.                         break;

  752.                       } else {

  753.                         rle_v1 = 1;

  754.                         rle_v2 = (*buf1) - 1;

  755.                       }

  756.                     case 5:

  757.                         LP2_CHECK(buf1,rle_v3,lp2)

  758.                     case 4:

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

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

  761.                           cur_lp[j] = lv1;

  762.                           cur_lp[j+1] = lv2;

  763.                         }

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

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

  766.                       } else {

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

  768.                           cur_lp[j] = lv1;

  769.                           cur_lp[j+1] = lv2;

  770.                         }

  771.                       }

  772.                       lp2 = 4;

  773.                       break;

  774. 

  775.                     case 6:

  776.                       lp2 = 4;

  777.                       break;

  778. 

  779.                     case 7:

  780.                       if(lp2 == 0) {

  781.                         if(rle_v3 != 0) 

  782.                           rle_v3 = 0;

  783.                         else {

  784.                           buf1--;

  785.                           rle_v3 = 1;

  786.                         }

  787.                         lp2 = 4;

  788.                       }

  789.                       break;

  790. 

  791.                     case 9:

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

  793.                       lv1 = *buf1;

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

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

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

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

  798.                         cur_lp[j] = lv;

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

  800.                       break;

  801. 

  802.                     default: 

  803.                       return;

  804.                   }

  805.                 }

  806. 

  807.                 cur_frm_pos += 8;

  808.               }

  809. 

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

  811.               flag1 = 0;

  812.             }

  813.           } else {

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

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

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

  817.                   k = *buf1++;

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

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

  820. 

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

  822.                     case 0:

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

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

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

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

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

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

  829.                       lp2++;

  830.                       break;

  831. 

  832.                     case 1:

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

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

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

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

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

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

  839.                       lp2++;

  840.                       break;

  841. 

  842.                     case 2:

  843.                       if(lp2 == 0) {

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

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

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

  847.                         }

  848.                         lp2 += 2;

  849.                       }

  850.                       break;

  851. 

  852.                     case 3:

  853.                       if(lp2 < 2) {

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

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

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

  857.                         }

  858.                         lp2 = 3;

  859.                       }

  860.                       break;

  861. 

  862.                     case 8:

  863.                       if(lp2 == 0) {

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

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

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

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

  868.                         }

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

  870.                         break;

  871.                       } else {

  872.                         rle_v1 = 1;

  873.                         rle_v2 = (*buf1) - 1;

  874.                       }

  875.                     case 5:

  876.                     case 7:

  877.                         LP2_CHECK(buf1,rle_v3,lp2)

  878.                     case 6:

  879.                     case 4:

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

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

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

  883.                       }

  884.                       lp2 = 4;

  885.                       break;

  886. 

  887.                     case 9:

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

  889.                       lv1 = *buf1;

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

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

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

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

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

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

  896.                       break;

  897. 

  898.                     default: 

  899.                       return;

  900.                   }

  901.                 }

  902. 

  903.                 cur_frm_pos += 8;

  904.                 ref_frm_pos += 8;

  905.               }

  906. 

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

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

  909.             }

  910.           }

  911.           break;

  912. 

  913.         case 11:                    /********** CASE 11 **********/

  914.           if(ref_vectors == NULL) 

  915.             return;

  916. 

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

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

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

  920.                 k = *buf1++;

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

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

  923. 

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

  925.                   case 0:

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

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

  928.                     lp2++;

  929.                     break;

  930. 

  931.                   case 1:

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

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

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

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

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

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

  938.                     lp2++;

  939.                     break;

  940. 

  941.                   case 2:

  942.                     if(lp2 == 0) {

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

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

  945.                       lp2 += 2;

  946.                     }

  947.                     break;

  948. 

  949.                   case 3:

  950.                     if(lp2 < 2) {

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

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

  953.                       lp2 = 3;

  954.                     }

  955.                     break;

  956. 

  957.                   case 8:

  958.                     if(lp2 == 0) {

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

  960. 

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

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

  963. 

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

  965.                       break;

  966.                     } else {

  967.                       rle_v1 = 1;

  968.                       rle_v2 = (*buf1) - 1;

  969.                     }

  970.                   case 5:

  971.                   case 7:

  972.                       LP2_CHECK(buf1,rle_v3,lp2)

  973.                   case 4:

  974.                   case 6:

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

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

  977.                     lp2 = 4;

  978.                     break;

  979. 

  980.                 case 9:

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

  982.                   lv1 = *buf1++;

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

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

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

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

  987.                     cur_lp[j] = lv;

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

  989.                   break;

  990. 

  991.                   default: 

  992.                     return;

  993.                 }

  994.               }

  995. 

  996.               cur_frm_pos += 4;

  997.               ref_frm_pos += 4;

  998.             }

  999. 

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

  1001.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1002.           }

  1003.           break;

  1004. 

  1005.         default: 

  1006.           return;

  1007.       }

  1008.     }

  1009. 

  1010.     if(strip < strip_tbl) 

  1011.       return;

  1012. 

  1013.     for( ; strip >= strip_tbl; strip--) {

  1014.       if(strip->split_flag != 0) {

  1015.         strip->split_flag = 0;

  1016.         strip->usl7 = (strip-1)->usl7;

  1017. 

  1018.         if(strip->split_direction) {

  1019.           strip->xpos += strip->width;

  1020.           strip->width = (strip-1)->width - strip->width;

  1021.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1022.             strip->width = width - strip->xpos;

  1023.         } else {

  1024.           strip->ypos += strip->height;

  1025.           strip->height = (strip-1)->height - strip->height;

  1026.         }

  1027.         break;

  1028.       }

  1029.     }

  1030.   }

  1031. }

  1032. 

  1033. static int indeo3_decode_init(AVCodecContext *avctx)

  1034. {

  1035.     Indeo3DecodeContext *s = avctx->priv_data;

  1036. 

  1037.     s->avctx = avctx;

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

  1039.     s->height = avctx->height;

  1040.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1041.     avctx->has_b_frames = 0;

  1042. 

  1043.     build_modpred(s);

  1044.     iv_alloc_frames(s);

  1045. 

  1046.     return 0;

  1047. }

  1048. 

  1049. static int indeo3_decode_frame(AVCodecContext *avctx,

  1050.                                void *data, int *data_size,

  1051.                                unsigned char *buf, int buf_size)

  1052. {

  1053.     Indeo3DecodeContext *s=avctx->priv_data;

  1054.     unsigned char *src, *dest;

  1055.     int y;

  1056. 

  1057.     iv_decode_frame(s, buf, buf_size);

  1058. 

  1059.     if(s->frame.data[0])

  1060.         avctx->release_buffer(avctx, &s->frame);

  1061. 

  1062.     s->frame.reference = 0;

  1063.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1064.         fprintf(stderr, "get_buffer() failed\n");

  1065.         return -1;

  1066.     }

  1067. 

  1068.     src = s->cur_frame->Ybuf;

  1069.     dest = s->frame.data[0];

  1070.     for (y = 0; y < s->height; y++) {

  1071.       memcpy(dest, src, s->cur_frame->y_w);

  1072.       src += s->cur_frame->y_w;

  1073.       dest += s->frame.linesize[0];

  1074.     }

  1075. 

  1076.     src = s->cur_frame->Ubuf;

  1077.     dest = s->frame.data[1];

  1078.     for (y = 0; y < s->height / 4; y++) {

  1079.       memcpy(dest, src, s->cur_frame->uv_w);

  1080.       src += s->cur_frame->uv_w;

  1081.       dest += s->frame.linesize[1];

  1082.     }

  1083. 

  1084.     src = s->cur_frame->Vbuf;

  1085.     dest = s->frame.data[2];

  1086.     for (y = 0; y < s->height / 4; y++) {

  1087.       memcpy(dest, src, s->cur_frame->uv_w);

  1088.       src += s->cur_frame->uv_w;

  1089.       dest += s->frame.linesize[2];

  1090.     }

  1091. 

  1092.     *data_size=sizeof(AVFrame);

  1093.     *(AVFrame*)data= s->frame;

  1094. 

  1095.     return buf_size;

  1096. }

  1097. 

  1098. static int indeo3_decode_end(AVCodecContext *avctx)

  1099. {

  1100.     Indeo3DecodeContext *s = avctx->priv_data;

  1101. 

  1102.     iv_free_func(s);

  1103. 

  1104.     return 0;

  1105. }

  1106. 

  1107. AVCodec indeo3_decoder = {

  1108.     "indeo3",

  1109.     CODEC_TYPE_VIDEO,

  1110.     CODEC_ID_INDEO3,

  1111.     sizeof(Indeo3DecodeContext),

  1112.     indeo3_decode_init,

  1113.     NULL,

  1114.     indeo3_decode_end,

  1115.     indeo3_decode_frame,

  1116.     0,

  1117.     NULL

  1118. };