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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  + 3) & (~3);

  107.   luma_height  = (s->height + 3) & (~3);

  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) + 3) & (~3);

  116.   chroma_height = ((luma_height>> 2) + 3) & (~3);

  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.   if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  227.   {

  228. 

  229.   buf_pos = buf + 16 + offs2;

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

  231.   buf_pos += 4;

  232. 

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

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

  235.     min(chroma_width, 40));

  236. 

  237.   buf_pos = buf + 16 + offs3;

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

  239.   buf_pos += 4;

  240. 

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

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

  243.     min(chroma_width, 40));

  244. 

  245.   }

  246. 

  247.   return 8;

  248. }

  249. 

  250. typedef struct {

  251.   long xpos;

  252.   long ypos;

  253.   long width;

  254.   long height;

  255.   long split_flag;

  256.   long split_direction;

  257.   long usl7;

  258. } ustr_t;

  259. 

  260. /* ---------------------------------------------------------------------- */

  261. 

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

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

  264.     if(rle_v3 != 0)         \

  265.       rle_v3 = 0;           \

  266.     else {                  \

  267.       rle_v3 = 1;           \

  268.       buf1 -= 2;            \

  269.     }                       \

  270.   }                         \

  271.   lp2 = 4;

  272. 

  273. 

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

  275.   if(rle_v3 == 0) {         \

  276.     rle_v2 = *buf1;         \

  277.     rle_v1 = 1;             \

  278.     if(rle_v2 > 32) {       \

  279.       rle_v2 -= 32;         \

  280.       rle_v1 = 0;           \

  281.     }                       \

  282.     rle_v3 = 1;             \

  283.   }                         \

  284.   buf1--;

  285. 

  286. 

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

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

  289.     rle_v3 = 0;           \

  290.   else {                  \

  291.     buf1--;               \

  292.     rle_v3 = 1;           \

  293.   }

  294. 

  295. 

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

  297.   rle_v2--;             \

  298.   if(rle_v2 == 0) {     \

  299.     rle_v3 = 0;         \

  300.     buf1 += 2;          \

  301.   }                     \

  302.   lp2 = 4;

  303. 

  304. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  307.   unsigned char *buf2, int min_width_160)

  308. {

  309.   unsigned char bit_buf;

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

  311.   long *width_tbl, width_tbl_arr[10];

  312.   char *ref_vectors;

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

  314.   uint32_t *cur_lp, *ref_lp;

  315.   const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];

  316.   unsigned short *correction_type_sp[2];

  317.   ustr_t strip_tbl[20], *strip;

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

  319.     rle_v1, rle_v2, rle_v3;

  320. 

  321.   bit_buf = 0;

  322.   ref_vectors = NULL;

  323. 

  324.   width_tbl = width_tbl_arr + 1;

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

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

  327.     width_tbl[j] = i * j;

  328. 

  329.   strip = strip_tbl;

  330. 

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

  332. 

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

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

  335.   strip->height = height;

  336.   strip->split_direction = 0;

  337.   strip->split_flag = 0;

  338.   strip->usl7 = 0;

  339. 

  340.   bit_pos = 0;

  341. 

  342.   rle_v1 = rle_v2 = rle_v3 = 0;

  343. 

  344.   while(strip >= strip_tbl) {

  345.     if(bit_pos <= 0) {

  346.       bit_pos = 8;

  347.       bit_buf = *buf1++;

  348.     }

  349. 

  350.     bit_pos -= 2;

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

  352. 

  353.     if(cmd == 0) {

  354.       strip++;

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

  356.       strip->split_flag = 1;

  357.       strip->split_direction = 0;

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

  359.       continue;

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

  361.       strip++;

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

  363.       strip->split_flag = 1;

  364.       strip->split_direction = 1;

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

  366.       continue;

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

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

  369.         strip->usl7 = 1;

  370.         ref_vectors = NULL;

  371.         continue;

  372.       }

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

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

  375.         strip->usl7 = 1;

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

  377.         buf1++;

  378.         continue;

  379.       }

  380.     }

  381. 

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

  383. 

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

  385.       blks_width += 3;

  386.     blks_width >>= 2;

  387.     blks_height = strip->height;

  388. 

  389.     if(ref_vectors != NULL) {

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

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

  392.     } else 

  393.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  394. 

  395.     if(cmd == 2) {

  396.       if(bit_pos <= 0) {

  397.         bit_pos = 8;

  398.         bit_buf = *buf1++;

  399.       }

  400. 

  401.       bit_pos -= 2;

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

  403. 

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

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

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

  407.             ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];

  408.           cur_frm_pos += 4;

  409.           ref_frm_pos += 4;

  410.         }

  411.       } else if(cmd != 1) 

  412.         return;

  413.     } else {

  414.       k = *buf1 >> 4;

  415.       j = *buf1 & 0x0f;

  416.       buf1++;

  417.       lv = j + fflags2;

  418. 

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

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

  421.         cp = ref_frm_pos;

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

  423.             int v = *cp >> 1;

  424.             *(cp++) = cp2[v]; 

  425.         }

  426.       }

  427. 

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

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

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

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

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

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

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

  435.       } else {

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

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

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

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

  440.       }

  441. 

  442.       switch(k) {

  443.         case 1:

  444.         case 0:                    /********** CASE 0 **********/

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

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

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

  448.                 k = *buf1++;

  449.                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];

  450.                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];

  451. 

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

  453.                   case 0:

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

  455.                     lp2++;

  456.                     break;

  457.                   case 1:

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

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

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

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

  462.                     lp2++;

  463.                     break;

  464.                   case 2:

  465.                     if(lp2 == 0) {

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

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

  468.                       lp2 += 2;

  469.                     }

  470.                     break;

  471.                   case 3:

  472.                     if(lp2 < 2) {

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

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

  475.                       lp2 = 3;

  476.                     }

  477.                     break;

  478.                   case 8:

  479.                     if(lp2 == 0) {

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

  481. 

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

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

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

  485.                       }

  486. 

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

  488.                       break;

  489.                     } else {

  490.                       rle_v1 = 1;

  491.                       rle_v2 = *buf1 - 1;

  492.                     }

  493.                   case 5:

  494.                       LP2_CHECK(buf1,rle_v3,lp2)

  495.                   case 4:

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

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

  498.                     lp2 = 4;

  499.                     break;

  500. 

  501.                   case 7:

  502.                     if(rle_v3 != 0) 

  503.                       rle_v3 = 0;

  504.                     else {

  505.                       buf1--;

  506.                       rle_v3 = 1;

  507.                     }

  508.                   case 6:

  509.                     if(ref_vectors != NULL) {

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

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

  512.                     }

  513.                     lp2 = 4;

  514.                     break;

  515. 

  516.                   case 9:

  517.                     lv1 = *buf1++;

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

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

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

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

  522.                       cur_lp[j] = lv;

  523. 

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

  525.                     break;

  526.                   default: 

  527.                     return;

  528.                 }

  529.               }

  530. 

  531.               cur_frm_pos += 4;

  532.               ref_frm_pos += 4;

  533.             }

  534. 

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

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

  537.           }

  538.           break;

  539. 

  540.         case 4:

  541.         case 3:                    /********** CASE 3 **********/

  542.           if(ref_vectors != NULL) 

  543.             return;

  544.           flag1 = 1;

  545. 

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

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

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

  549.                 k = *buf1++;

  550. 

  551.                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];

  552.                 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];

  553. 

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

  555.                   case 0:

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

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

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

  559.                     else

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

  561.                     lp2++;

  562.                     break;

  563. 

  564.                   case 1:

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

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

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

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

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

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

  571.                     else

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

  573.                     lp2++;

  574.                     break;

  575. 

  576.                   case 2:

  577.                     if(lp2 == 0) {

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

  579.                         cur_lp[j] = *ref_lp;

  580.                       lp2 += 2;

  581.                     }

  582.                     break;

  583. 

  584.                   case 3:

  585.                     if(lp2 < 2) {

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

  587.                         cur_lp[j] = *ref_lp;

  588.                       lp2 = 3;

  589.                     }

  590.                     break;

  591. 

  592.                   case 6:

  593.                     lp2 = 4;

  594.                     break;

  595. 

  596.                   case 7:

  597.                     if(rle_v3 != 0) 

  598.                       rle_v3 = 0;

  599.                     else {

  600.                       buf1--;

  601.                       rle_v3 = 1;

  602.                     }

  603.                     lp2 = 4;

  604.                     break;

  605. 

  606.                   case 8:

  607.                     if(lp2 == 0) {

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

  609. 

  610.                       if(rle_v1 == 1) {

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

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

  613.                       }

  614. 

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

  616.                       break;

  617.                     } else {

  618.                       rle_v2 = (*buf1) - 1;

  619.                       rle_v1 = 1;

  620.                     }

  621.                   case 5:

  622.                       LP2_CHECK(buf1,rle_v3,lp2)

  623.                   case 4:

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

  625.                       cur_lp[j] = *ref_lp;

  626.                     lp2 = 4;

  627.                     break;

  628. 

  629.                   case 9:

  630.                     av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  631.                     lv1 = *buf1++;

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

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

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

  635. 

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

  637.                       cur_lp[j] = lv;

  638. 

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

  640.                     break;

  641. 

  642.                   default: 

  643.                     return;

  644.                 }

  645.               }

  646. 

  647.               cur_frm_pos += 4;

  648.             }

  649. 

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

  651.             flag1 = 0;

  652.           }

  653.           break;

  654. 

  655.         case 10:                    /********** CASE 10 **********/

  656.           if(ref_vectors == NULL) {

  657.             flag1 = 1;

  658. 

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

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

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

  662.                   k = *buf1++;

  663.                   cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];

  664.                   ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];

  665.                   lv1 = ref_lp[0];

  666.                   lv2 = ref_lp[1];

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

  668.                     lv1 = lv1 & 0x00FF00FF;

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

  670.                     lv2 = lv2 & 0x00FF00FF;

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

  672.                   }

  673. 

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

  675.                     case 0:

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

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

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

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

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

  681.                       } else {

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

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

  684.                       }

  685.                       lp2++;

  686.                       break;

  687. 

  688.                     case 1:

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

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

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

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

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

  694.                       } else {

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

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

  697.                       }

  698.                       lp2++;

  699.                       break;

  700. 

  701.                     case 2:

  702.                       if(lp2 == 0) {

  703.                         if(flag1 != 0) {

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

  705.                             cur_lp[j] = lv1;

  706.                             cur_lp[j+1] = lv2;

  707.                           }

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

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

  710.                         } else {

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

  712.                             cur_lp[j] = lv1;

  713.                             cur_lp[j+1] = lv2;

  714.                           }

  715.                         }

  716.                         lp2 += 2;

  717.                       }

  718.                       break;

  719. 

  720.                     case 3:

  721.                       if(lp2 < 2) {

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

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

  724.                             cur_lp[j] = lv1;

  725.                             cur_lp[j+1] = lv2;

  726.                           }

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

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

  729.                         } else {

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

  731.                             cur_lp[j] = lv1;

  732.                             cur_lp[j+1] = lv2;

  733.                           }

  734.                         }

  735.                         lp2 = 3;

  736.                       }

  737.                       break;

  738. 

  739.                     case 8:

  740.                       if(lp2 == 0) {

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

  742.                         if(rle_v1 == 1) {

  743.                           if(flag1 != 0) {

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

  745.                               cur_lp[j] = lv1;

  746.                               cur_lp[j+1] = lv2;

  747.                             }

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

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

  750.                           } else {

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

  752.                               cur_lp[j] = lv1;

  753.                               cur_lp[j+1] = lv2;

  754.                             }

  755.                           }

  756.                         }

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

  758.                         break;

  759.                       } else {

  760.                         rle_v1 = 1;

  761.                         rle_v2 = (*buf1) - 1;

  762.                       }

  763.                     case 5:

  764.                         LP2_CHECK(buf1,rle_v3,lp2)

  765.                     case 4:

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

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

  768.                           cur_lp[j] = lv1;

  769.                           cur_lp[j+1] = lv2;

  770.                         }

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

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

  773.                       } else {

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

  775.                           cur_lp[j] = lv1;

  776.                           cur_lp[j+1] = lv2;

  777.                         }

  778.                       }

  779.                       lp2 = 4;

  780.                       break;

  781. 

  782.                     case 6:

  783.                       lp2 = 4;

  784.                       break;

  785. 

  786.                     case 7:

  787.                       if(lp2 == 0) {

  788.                         if(rle_v3 != 0) 

  789.                           rle_v3 = 0;

  790.                         else {

  791.                           buf1--;

  792.                           rle_v3 = 1;

  793.                         }

  794.                         lp2 = 4;

  795.                       }

  796.                       break;

  797. 

  798.                     case 9:

  799.                       av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  800.                       lv1 = *buf1;

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

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

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

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

  805.                         cur_lp[j] = lv;

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

  807.                       break;

  808. 

  809.                     default: 

  810.                       return;

  811.                   }

  812.                 }

  813. 

  814.                 cur_frm_pos += 8;

  815.               }

  816. 

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

  818.               flag1 = 0;

  819.             }

  820.           } else {

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

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

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

  824.                   k = *buf1++;

  825.                   cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];

  826.                   ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];

  827. 

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

  829.                     case 0:

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

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

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

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

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

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

  836.                       lp2++;

  837.                       break;

  838. 

  839.                     case 1:

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

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

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

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

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

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

  846.                       lp2++;

  847.                       break;

  848. 

  849.                     case 2:

  850.                       if(lp2 == 0) {

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

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

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

  854.                         }

  855.                         lp2 += 2;

  856.                       }

  857.                       break;

  858. 

  859.                     case 3:

  860.                       if(lp2 < 2) {

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

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

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

  864.                         }

  865.                         lp2 = 3;

  866.                       }

  867.                       break;

  868. 

  869.                     case 8:

  870.                       if(lp2 == 0) {

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

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

  873.                           ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];

  874.                           ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];

  875.                         }

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

  877.                         break;

  878.                       } else {

  879.                         rle_v1 = 1;

  880.                         rle_v2 = (*buf1) - 1;

  881.                       }

  882.                     case 5:

  883.                     case 7:

  884.                         LP2_CHECK(buf1,rle_v3,lp2)

  885.                     case 6:

  886.                     case 4:

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

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

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

  890.                       }

  891.                       lp2 = 4;

  892.                       break;

  893. 

  894.                     case 9:

  895.                       av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  896.                       lv1 = *buf1;

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

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

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

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

  901.                         ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;

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

  903.                       break;

  904. 

  905.                     default: 

  906.                       return;

  907.                   }

  908.                 }

  909. 

  910.                 cur_frm_pos += 8;

  911.                 ref_frm_pos += 8;

  912.               }

  913. 

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

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

  916.             }

  917.           }

  918.           break;

  919. 

  920.         case 11:                    /********** CASE 11 **********/

  921.           if(ref_vectors == NULL) 

  922.             return;

  923. 

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

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

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

  927.                 k = *buf1++;

  928.                 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];

  929.                 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];

  930. 

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

  932.                   case 0:

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

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

  935.                     lp2++;

  936.                     break;

  937. 

  938.                   case 1:

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

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

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

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

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

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

  945.                     lp2++;

  946.                     break;

  947. 

  948.                   case 2:

  949.                     if(lp2 == 0) {

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

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

  952.                       lp2 += 2;

  953.                     }

  954.                     break;

  955. 

  956.                   case 3:

  957.                     if(lp2 < 2) {

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

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

  960.                       lp2 = 3;

  961.                     }

  962.                     break;

  963. 

  964.                   case 8:

  965.                     if(lp2 == 0) {

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

  967. 

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

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

  970. 

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

  972.                       break;

  973.                     } else {

  974.                       rle_v1 = 1;

  975.                       rle_v2 = (*buf1) - 1;

  976.                     }

  977.                   case 5:

  978.                   case 7:

  979.                       LP2_CHECK(buf1,rle_v3,lp2)

  980.                   case 4:

  981.                   case 6:

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

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

  984.                     lp2 = 4;

  985.                     break;

  986. 

  987.                 case 9:

  988.                   av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  989.                   lv1 = *buf1++;

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

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

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

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

  994.                     cur_lp[j] = lv;

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

  996.                   break;

  997. 

  998.                   default: 

  999.                     return;

  1000.                 }

  1001.               }

  1002. 

  1003.               cur_frm_pos += 4;

  1004.               ref_frm_pos += 4;

  1005.             }

  1006. 

  1007.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1008.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1009.           }

  1010.           break;

  1011. 

  1012.         default: 

  1013.           return;

  1014.       }

  1015.     }

  1016. 

  1017.     if(strip < strip_tbl) 

  1018.       return;

  1019. 

  1020.     for( ; strip >= strip_tbl; strip--) {

  1021.       if(strip->split_flag != 0) {

  1022.         strip->split_flag = 0;

  1023.         strip->usl7 = (strip-1)->usl7;

  1024. 

  1025.         if(strip->split_direction) {

  1026.           strip->xpos += strip->width;

  1027.           strip->width = (strip-1)->width - strip->width;

  1028.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1029.             strip->width = width - strip->xpos;

  1030.         } else {

  1031.           strip->ypos += strip->height;

  1032.           strip->height = (strip-1)->height - strip->height;

  1033.         }

  1034.         break;

  1035.       }

  1036.     }

  1037.   }

  1038. }

  1039. 

  1040. static int indeo3_decode_init(AVCodecContext *avctx)

  1041. {

  1042.     Indeo3DecodeContext *s = avctx->priv_data;

  1043. 

  1044.     s->avctx = avctx;

  1045.     s->width = avctx->width;

  1046.     s->height = avctx->height;

  1047.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1048.     avctx->has_b_frames = 0;

  1049. 

  1050.     build_modpred(s);

  1051.     iv_alloc_frames(s);

  1052. 

  1053.     return 0;

  1054. }

  1055. 

  1056. static int indeo3_decode_frame(AVCodecContext *avctx,

  1057.                                void *data, int *data_size,

  1058.                                unsigned char *buf, int buf_size)

  1059. {

  1060.     Indeo3DecodeContext *s=avctx->priv_data;

  1061.     unsigned char *src, *dest;

  1062.     int y;

  1063. 

  1064.     /* no supplementary picture */

  1065.     if (buf_size == 0) {

  1066.         return 0;

  1067.     }

  1068. 

  1069.     iv_decode_frame(s, buf, buf_size);

  1070. 

  1071.     if(s->frame.data[0])

  1072.         avctx->release_buffer(avctx, &s->frame);

  1073. 

  1074.     s->frame.reference = 0;

  1075.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1076.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1077.         return -1;

  1078.     }

  1079. 

  1080.     src = s->cur_frame->Ybuf;

  1081.     dest = s->frame.data[0];

  1082.     for (y = 0; y < s->height; y++) {

  1083.       memcpy(dest, src, s->cur_frame->y_w);

  1084.       src += s->cur_frame->y_w;

  1085.       dest += s->frame.linesize[0];

  1086.     }

  1087. 

  1088.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1089.     {

  1090.     src = s->cur_frame->Ubuf;

  1091.     dest = s->frame.data[1];

  1092.     for (y = 0; y < s->height / 4; y++) {

  1093.       memcpy(dest, src, s->cur_frame->uv_w);

  1094.       src += s->cur_frame->uv_w;

  1095.       dest += s->frame.linesize[1];

  1096.     }

  1097. 

  1098.     src = s->cur_frame->Vbuf;

  1099.     dest = s->frame.data[2];

  1100.     for (y = 0; y < s->height / 4; y++) {

  1101.       memcpy(dest, src, s->cur_frame->uv_w);

  1102.       src += s->cur_frame->uv_w;

  1103.       dest += s->frame.linesize[2];

  1104.     }

  1105.     }

  1106. 

  1107.     *data_size=sizeof(AVFrame);

  1108.     *(AVFrame*)data= s->frame;

  1109. 

  1110.     return buf_size;

  1111. }

  1112. 

  1113. static int indeo3_decode_end(AVCodecContext *avctx)

  1114. {

  1115.     Indeo3DecodeContext *s = avctx->priv_data;

  1116. 

  1117.     iv_free_func(s);

  1118. 

  1119.     return 0;

  1120. }

  1121. 

  1122. AVCodec indeo3_decoder = {

  1123.     "indeo3",

  1124.     CODEC_TYPE_VIDEO,

  1125.     CODEC_ID_INDEO3,

  1126.     sizeof(Indeo3DecodeContext),

  1127.     indeo3_decode_init,

  1128.     NULL,

  1129.     indeo3_decode_end,

  1130.     indeo3_decode_frame,

  1131.     0,

  1132.     NULL

  1133. };