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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, i;

  105.   unsigned int bufsize;

  106. 

  107.   luma_width   = (s->width  + 3) & (~3);

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

  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) + 3) & (~3);

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

  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.   

  200.   if(avcodec_check_dimensions(NULL, hdr_width, hdr_height))

  201.       return -1;

  202.   

  203.   buf_pos += 2;

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

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

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

  207.   buf_pos += 4;

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

  209.   buf_pos += 4;

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

  211.   buf_pos += 8;

  212.   hdr_pos = buf_pos;

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

  214. 

  215.   if(fflags1 & 0x200) {

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

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

  218.   } else {

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

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

  221.   }

  222. 

  223.   buf_pos = buf + 16 + offs1;

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

  225.   buf_pos += 4;

  226. 

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

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

  229.     min(hdr_width, 160));

  230. 

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

  232.   {

  233. 

  234.   buf_pos = buf + 16 + offs2;

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

  236.   buf_pos += 4;

  237. 

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

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

  240.     min(chroma_width, 40));

  241. 

  242.   buf_pos = buf + 16 + offs3;

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

  244.   buf_pos += 4;

  245. 

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

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

  248.     min(chroma_width, 40));

  249. 

  250.   }

  251. 

  252.   return 8;

  253. }

  254. 

  255. typedef struct {

  256.   long xpos;

  257.   long ypos;

  258.   long width;

  259.   long height;

  260.   long split_flag;

  261.   long split_direction;

  262.   long usl7;

  263. } ustr_t;

  264. 

  265. /* ---------------------------------------------------------------------- */

  266. 

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

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

  269.     if(rle_v3 != 0)         \

  270.       rle_v3 = 0;           \

  271.     else {                  \

  272.       rle_v3 = 1;           \

  273.       buf1 -= 2;            \

  274.     }                       \

  275.   }                         \

  276.   lp2 = 4;

  277. 

  278. 

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

  280.   if(rle_v3 == 0) {         \

  281.     rle_v2 = *buf1;         \

  282.     rle_v1 = 1;             \

  283.     if(rle_v2 > 32) {       \

  284.       rle_v2 -= 32;         \

  285.       rle_v1 = 0;           \

  286.     }                       \

  287.     rle_v3 = 1;             \

  288.   }                         \

  289.   buf1--;

  290. 

  291. 

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

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

  294.     rle_v3 = 0;           \

  295.   else {                  \

  296.     buf1--;               \

  297.     rle_v3 = 1;           \

  298.   }

  299. 

  300. 

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

  302.   rle_v2--;             \

  303.   if(rle_v2 == 0) {     \

  304.     rle_v3 = 0;         \

  305.     buf1 += 2;          \

  306.   }                     \

  307.   lp2 = 4;

  308. 

  309. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  312.   unsigned char *buf2, int min_width_160)

  313. {

  314.   unsigned char bit_buf;

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

  316.   long *width_tbl, width_tbl_arr[10];

  317.   char *ref_vectors;

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

  319.   uint32_t *cur_lp, *ref_lp;

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

  321.   unsigned short *correction_type_sp[2];

  322.   ustr_t strip_tbl[20], *strip;

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

  324.     rle_v1, rle_v2, rle_v3;

  325. 

  326.   bit_buf = 0;

  327.   ref_vectors = NULL;

  328. 

  329.   width_tbl = width_tbl_arr + 1;

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

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

  332.     width_tbl[j] = i * j;

  333. 

  334.   strip = strip_tbl;

  335. 

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

  337. 

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

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

  340.   strip->height = height;

  341.   strip->split_direction = 0;

  342.   strip->split_flag = 0;

  343.   strip->usl7 = 0;

  344. 

  345.   bit_pos = 0;

  346. 

  347.   rle_v1 = rle_v2 = rle_v3 = 0;

  348. 

  349.   while(strip >= strip_tbl) {

  350.     if(bit_pos <= 0) {

  351.       bit_pos = 8;

  352.       bit_buf = *buf1++;

  353.     }

  354. 

  355.     bit_pos -= 2;

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

  357. 

  358.     if(cmd == 0) {

  359.       strip++;

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

  361.       strip->split_flag = 1;

  362.       strip->split_direction = 0;

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

  364.       continue;

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

  366.       strip++;

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

  368.       strip->split_flag = 1;

  369.       strip->split_direction = 1;

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

  371.       continue;

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

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

  374.         strip->usl7 = 1;

  375.         ref_vectors = NULL;

  376.         continue;

  377.       }

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

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

  380.         strip->usl7 = 1;

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

  382.         buf1++;

  383.         continue;

  384.       }

  385.     }

  386. 

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

  388. 

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

  390.       blks_width += 3;

  391.     blks_width >>= 2;

  392.     blks_height = strip->height;

  393. 

  394.     if(ref_vectors != NULL) {

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

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

  397.     } else 

  398.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  399. 

  400.     if(cmd == 2) {

  401.       if(bit_pos <= 0) {

  402.         bit_pos = 8;

  403.         bit_buf = *buf1++;

  404.       }

  405. 

  406.       bit_pos -= 2;

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

  408. 

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

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

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

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

  413.           cur_frm_pos += 4;

  414.           ref_frm_pos += 4;

  415.         }

  416.       } else if(cmd != 1) 

  417.         return;

  418.     } else {

  419.       k = *buf1 >> 4;

  420.       j = *buf1 & 0x0f;

  421.       buf1++;

  422.       lv = j + fflags2;

  423. 

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

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

  426.         cp = ref_frm_pos;

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

  428.             int v = *cp >> 1;

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

  430.         }

  431.       }

  432. 

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

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

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

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

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

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

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

  440.       } else {

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

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

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

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

  445.       }

  446. 

  447.       switch(k) {

  448.         case 1:

  449.         case 0:                    /********** CASE 0 **********/

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

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

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

  453.                 k = *buf1++;

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

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

  456. 

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

  458.                   case 0:

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

  460.                     lp2++;

  461.                     break;

  462.                   case 1:

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

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

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

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

  467.                     lp2++;

  468.                     break;

  469.                   case 2:

  470.                     if(lp2 == 0) {

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

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

  473.                       lp2 += 2;

  474.                     }

  475.                     break;

  476.                   case 3:

  477.                     if(lp2 < 2) {

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

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

  480.                       lp2 = 3;

  481.                     }

  482.                     break;

  483.                   case 8:

  484.                     if(lp2 == 0) {

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

  486. 

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

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

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

  490.                       }

  491. 

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

  493.                       break;

  494.                     } else {

  495.                       rle_v1 = 1;

  496.                       rle_v2 = *buf1 - 1;

  497.                     }

  498.                   case 5:

  499.                       LP2_CHECK(buf1,rle_v3,lp2)

  500.                   case 4:

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

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

  503.                     lp2 = 4;

  504.                     break;

  505. 

  506.                   case 7:

  507.                     if(rle_v3 != 0) 

  508.                       rle_v3 = 0;

  509.                     else {

  510.                       buf1--;

  511.                       rle_v3 = 1;

  512.                     }

  513.                   case 6:

  514.                     if(ref_vectors != NULL) {

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

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

  517.                     }

  518.                     lp2 = 4;

  519.                     break;

  520. 

  521.                   case 9:

  522.                     lv1 = *buf1++;

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

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

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

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

  527.                       cur_lp[j] = lv;

  528. 

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

  530.                     break;

  531.                   default: 

  532.                     return;

  533.                 }

  534.               }

  535. 

  536.               cur_frm_pos += 4;

  537.               ref_frm_pos += 4;

  538.             }

  539. 

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

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

  542.           }

  543.           break;

  544. 

  545.         case 4:

  546.         case 3:                    /********** CASE 3 **********/

  547.           if(ref_vectors != NULL) 

  548.             return;

  549.           flag1 = 1;

  550. 

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

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

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

  554.                 k = *buf1++;

  555. 

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

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

  558. 

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

  560.                   case 0:

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

  566.                     lp2++;

  567.                     break;

  568. 

  569.                   case 1:

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

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

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

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

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

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

  576.                     else

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

  578.                     lp2++;

  579.                     break;

  580. 

  581.                   case 2:

  582.                     if(lp2 == 0) {

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

  584.                         cur_lp[j] = *ref_lp;

  585.                       lp2 += 2;

  586.                     }

  587.                     break;

  588. 

  589.                   case 3:

  590.                     if(lp2 < 2) {

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

  592.                         cur_lp[j] = *ref_lp;

  593.                       lp2 = 3;

  594.                     }

  595.                     break;

  596. 

  597.                   case 6:

  598.                     lp2 = 4;

  599.                     break;

  600. 

  601.                   case 7:

  602.                     if(rle_v3 != 0) 

  603.                       rle_v3 = 0;

  604.                     else {

  605.                       buf1--;

  606.                       rle_v3 = 1;

  607.                     }

  608.                     lp2 = 4;

  609.                     break;

  610. 

  611.                   case 8:

  612.                     if(lp2 == 0) {

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

  614. 

  615.                       if(rle_v1 == 1) {

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

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

  618.                       }

  619. 

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

  621.                       break;

  622.                     } else {

  623.                       rle_v2 = (*buf1) - 1;

  624.                       rle_v1 = 1;

  625.                     }

  626.                   case 5:

  627.                       LP2_CHECK(buf1,rle_v3,lp2)

  628.                   case 4:

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

  630.                       cur_lp[j] = *ref_lp;

  631.                     lp2 = 4;

  632.                     break;

  633. 

  634.                   case 9:

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

  636.                     lv1 = *buf1++;

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

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

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

  640. 

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

  642.                       cur_lp[j] = lv;

  643. 

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

  645.                     break;

  646. 

  647.                   default: 

  648.                     return;

  649.                 }

  650.               }

  651. 

  652.               cur_frm_pos += 4;

  653.             }

  654. 

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

  656.             flag1 = 0;

  657.           }

  658.           break;

  659. 

  660.         case 10:                    /********** CASE 10 **********/

  661.           if(ref_vectors == NULL) {

  662.             flag1 = 1;

  663. 

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

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

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

  667.                   k = *buf1++;

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

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

  670.                   lv1 = ref_lp[0];

  671.                   lv2 = ref_lp[1];

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

  673.                     lv1 = lv1 & 0x00FF00FF;

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

  675.                     lv2 = lv2 & 0x00FF00FF;

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

  677.                   }

  678. 

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

  680.                     case 0:

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

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

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

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

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

  686.                       } else {

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

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

  689.                       }

  690.                       lp2++;

  691.                       break;

  692. 

  693.                     case 1:

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

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

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

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

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

  699.                       } else {

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

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

  702.                       }

  703.                       lp2++;

  704.                       break;

  705. 

  706.                     case 2:

  707.                       if(lp2 == 0) {

  708.                         if(flag1 != 0) {

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

  710.                             cur_lp[j] = lv1;

  711.                             cur_lp[j+1] = lv2;

  712.                           }

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

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

  715.                         } else {

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

  717.                             cur_lp[j] = lv1;

  718.                             cur_lp[j+1] = lv2;

  719.                           }

  720.                         }

  721.                         lp2 += 2;

  722.                       }

  723.                       break;

  724. 

  725.                     case 3:

  726.                       if(lp2 < 2) {

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

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

  729.                             cur_lp[j] = lv1;

  730.                             cur_lp[j+1] = lv2;

  731.                           }

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

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

  734.                         } else {

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

  736.                             cur_lp[j] = lv1;

  737.                             cur_lp[j+1] = lv2;

  738.                           }

  739.                         }

  740.                         lp2 = 3;

  741.                       }

  742.                       break;

  743. 

  744.                     case 8:

  745.                       if(lp2 == 0) {

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

  747.                         if(rle_v1 == 1) {

  748.                           if(flag1 != 0) {

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

  750.                               cur_lp[j] = lv1;

  751.                               cur_lp[j+1] = lv2;

  752.                             }

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

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

  755.                           } else {

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

  757.                               cur_lp[j] = lv1;

  758.                               cur_lp[j+1] = lv2;

  759.                             }

  760.                           }

  761.                         }

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

  763.                         break;

  764.                       } else {

  765.                         rle_v1 = 1;

  766.                         rle_v2 = (*buf1) - 1;

  767.                       }

  768.                     case 5:

  769.                         LP2_CHECK(buf1,rle_v3,lp2)

  770.                     case 4:

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

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

  773.                           cur_lp[j] = lv1;

  774.                           cur_lp[j+1] = lv2;

  775.                         }

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

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

  778.                       } else {

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

  780.                           cur_lp[j] = lv1;

  781.                           cur_lp[j+1] = lv2;

  782.                         }

  783.                       }

  784.                       lp2 = 4;

  785.                       break;

  786. 

  787.                     case 6:

  788.                       lp2 = 4;

  789.                       break;

  790. 

  791.                     case 7:

  792.                       if(lp2 == 0) {

  793.                         if(rle_v3 != 0) 

  794.                           rle_v3 = 0;

  795.                         else {

  796.                           buf1--;

  797.                           rle_v3 = 1;

  798.                         }

  799.                         lp2 = 4;

  800.                       }

  801.                       break;

  802. 

  803.                     case 9:

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

  805.                       lv1 = *buf1;

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

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

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

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

  810.                         cur_lp[j] = lv;

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

  812.                       break;

  813. 

  814.                     default: 

  815.                       return;

  816.                   }

  817.                 }

  818. 

  819.                 cur_frm_pos += 8;

  820.               }

  821. 

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

  823.               flag1 = 0;

  824.             }

  825.           } else {

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

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

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

  829.                   k = *buf1++;

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

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

  832. 

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

  834.                     case 0:

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

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

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

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

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

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

  841.                       lp2++;

  842.                       break;

  843. 

  844.                     case 1:

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

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

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

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

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

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

  851.                       lp2++;

  852.                       break;

  853. 

  854.                     case 2:

  855.                       if(lp2 == 0) {

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

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

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

  859.                         }

  860.                         lp2 += 2;

  861.                       }

  862.                       break;

  863. 

  864.                     case 3:

  865.                       if(lp2 < 2) {

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

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

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

  869.                         }

  870.                         lp2 = 3;

  871.                       }

  872.                       break;

  873. 

  874.                     case 8:

  875.                       if(lp2 == 0) {

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

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

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

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

  880.                         }

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

  882.                         break;

  883.                       } else {

  884.                         rle_v1 = 1;

  885.                         rle_v2 = (*buf1) - 1;

  886.                       }

  887.                     case 5:

  888.                     case 7:

  889.                         LP2_CHECK(buf1,rle_v3,lp2)

  890.                     case 6:

  891.                     case 4:

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

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

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

  895.                       }

  896.                       lp2 = 4;

  897.                       break;

  898. 

  899.                     case 9:

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

  901.                       lv1 = *buf1;

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

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

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

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

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

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

  908.                       break;

  909. 

  910.                     default: 

  911.                       return;

  912.                   }

  913.                 }

  914. 

  915.                 cur_frm_pos += 8;

  916.                 ref_frm_pos += 8;

  917.               }

  918. 

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

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

  921.             }

  922.           }

  923.           break;

  924. 

  925.         case 11:                    /********** CASE 11 **********/

  926.           if(ref_vectors == NULL) 

  927.             return;

  928. 

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

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

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

  932.                 k = *buf1++;

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

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

  935. 

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

  937.                   case 0:

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

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

  940.                     lp2++;

  941.                     break;

  942. 

  943.                   case 1:

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

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

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

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

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

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

  950.                     lp2++;

  951.                     break;

  952. 

  953.                   case 2:

  954.                     if(lp2 == 0) {

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

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

  957.                       lp2 += 2;

  958.                     }

  959.                     break;

  960. 

  961.                   case 3:

  962.                     if(lp2 < 2) {

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

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

  965.                       lp2 = 3;

  966.                     }

  967.                     break;

  968. 

  969.                   case 8:

  970.                     if(lp2 == 0) {

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

  972. 

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

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

  975. 

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

  977.                       break;

  978.                     } else {

  979.                       rle_v1 = 1;

  980.                       rle_v2 = (*buf1) - 1;

  981.                     }

  982.                   case 5:

  983.                   case 7:

  984.                       LP2_CHECK(buf1,rle_v3,lp2)

  985.                   case 4:

  986.                   case 6:

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

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

  989.                     lp2 = 4;

  990.                     break;

  991. 

  992.                 case 9:

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

  994.                   lv1 = *buf1++;

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

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

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

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

  999.                     cur_lp[j] = lv;

  1000.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1001.                   break;

  1002. 

  1003.                   default: 

  1004.                     return;

  1005.                 }

  1006.               }

  1007. 

  1008.               cur_frm_pos += 4;

  1009.               ref_frm_pos += 4;

  1010.             }

  1011. 

  1012.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1013.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1014.           }

  1015.           break;

  1016. 

  1017.         default: 

  1018.           return;

  1019.       }

  1020.     }

  1021. 

  1022.     if(strip < strip_tbl) 

  1023.       return;

  1024. 

  1025.     for( ; strip >= strip_tbl; strip--) {

  1026.       if(strip->split_flag != 0) {

  1027.         strip->split_flag = 0;

  1028.         strip->usl7 = (strip-1)->usl7;

  1029. 

  1030.         if(strip->split_direction) {

  1031.           strip->xpos += strip->width;

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

  1033.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1034.             strip->width = width - strip->xpos;

  1035.         } else {

  1036.           strip->ypos += strip->height;

  1037.           strip->height = (strip-1)->height - strip->height;

  1038.         }

  1039.         break;

  1040.       }

  1041.     }

  1042.   }

  1043. }

  1044. 

  1045. static int indeo3_decode_init(AVCodecContext *avctx)

  1046. {

  1047.     Indeo3DecodeContext *s = avctx->priv_data;

  1048. 

  1049.     s->avctx = avctx;

  1050.     s->width = avctx->width;

  1051.     s->height = avctx->height;

  1052.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1053.     avctx->has_b_frames = 0;

  1054. 

  1055.     build_modpred(s);

  1056.     iv_alloc_frames(s);

  1057. 

  1058.     return 0;

  1059. }

  1060. 

  1061. static int indeo3_decode_frame(AVCodecContext *avctx,

  1062.                                void *data, int *data_size,

  1063.                                unsigned char *buf, int buf_size)

  1064. {

  1065.     Indeo3DecodeContext *s=avctx->priv_data;

  1066.     unsigned char *src, *dest;

  1067.     int y;

  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. };