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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.   buf_pos += 2;

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

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

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

  203.   buf_pos += 4;

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

  205.   buf_pos += 4;

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

  207.   buf_pos += 8;

  208.   hdr_pos = buf_pos;

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

  210. 

  211.   if(fflags1 & 0x200) {

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

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

  214.   } else {

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

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

  217.   }

  218. 

  219.   buf_pos = buf + 16 + offs1;

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

  221.   buf_pos += 4;

  222. 

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

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

  225.     min(hdr_width, 160));

  226. 

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

  228.   {

  229. 

  230.   buf_pos = buf + 16 + offs2;

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

  232.   buf_pos += 4;

  233. 

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

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

  236.     min(chroma_width, 40));

  237. 

  238.   buf_pos = buf + 16 + offs3;

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

  240.   buf_pos += 4;

  241. 

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

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

  244.     min(chroma_width, 40));

  245. 

  246.   }

  247. 

  248.   return 8;

  249. }

  250. 

  251. typedef struct {

  252.   long xpos;

  253.   long ypos;

  254.   long width;

  255.   long height;

  256.   long split_flag;

  257.   long split_direction;

  258.   long usl7;

  259. } ustr_t;

  260. 

  261. /* ---------------------------------------------------------------------- */

  262. 

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

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

  265.     if(rle_v3 != 0)         \

  266.       rle_v3 = 0;           \

  267.     else {                  \

  268.       rle_v3 = 1;           \

  269.       buf1 -= 2;            \

  270.     }                       \

  271.   }                         \

  272.   lp2 = 4;

  273. 

  274. 

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

  276.   if(rle_v3 == 0) {         \

  277.     rle_v2 = *buf1;         \

  278.     rle_v1 = 1;             \

  279.     if(rle_v2 > 32) {       \

  280.       rle_v2 -= 32;         \

  281.       rle_v1 = 0;           \

  282.     }                       \

  283.     rle_v3 = 1;             \

  284.   }                         \

  285.   buf1--;

  286. 

  287. 

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

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

  290.     rle_v3 = 0;           \

  291.   else {                  \

  292.     buf1--;               \

  293.     rle_v3 = 1;           \

  294.   }

  295. 

  296. 

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

  298.   rle_v2--;             \

  299.   if(rle_v2 == 0) {     \

  300.     rle_v3 = 0;         \

  301.     buf1 += 2;          \

  302.   }                     \

  303.   lp2 = 4;

  304. 

  305. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  308.   unsigned char *buf2, int min_width_160)

  309. {

  310.   unsigned char bit_buf;

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

  312.   long *width_tbl, width_tbl_arr[10];

  313.   char *ref_vectors;

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

  315.   uint32_t *cur_lp, *ref_lp;

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

  317.   unsigned short *correction_type_sp[2];

  318.   ustr_t strip_tbl[20], *strip;

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

  320.     rle_v1, rle_v2, rle_v3;

  321. 

  322.   bit_buf = 0;

  323.   ref_vectors = NULL;

  324. 

  325.   width_tbl = width_tbl_arr + 1;

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

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

  328.     width_tbl[j] = i * j;

  329. 

  330.   strip = strip_tbl;

  331. 

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

  333. 

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

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

  336.   strip->height = height;

  337.   strip->split_direction = 0;

  338.   strip->split_flag = 0;

  339.   strip->usl7 = 0;

  340. 

  341.   bit_pos = 0;

  342. 

  343.   rle_v1 = rle_v2 = rle_v3 = 0;

  344. 

  345.   while(strip >= strip_tbl) {

  346.     if(bit_pos <= 0) {

  347.       bit_pos = 8;

  348.       bit_buf = *buf1++;

  349.     }

  350. 

  351.     bit_pos -= 2;

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

  353. 

  354.     if(cmd == 0) {

  355.       strip++;

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

  357.       strip->split_flag = 1;

  358.       strip->split_direction = 0;

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

  360.       continue;

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

  362.       strip++;

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

  364.       strip->split_flag = 1;

  365.       strip->split_direction = 1;

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

  367.       continue;

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

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

  370.         strip->usl7 = 1;

  371.         ref_vectors = NULL;

  372.         continue;

  373.       }

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

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

  376.         strip->usl7 = 1;

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

  378.         buf1++;

  379.         continue;

  380.       }

  381.     }

  382. 

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

  384. 

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

  386.       blks_width += 3;

  387.     blks_width >>= 2;

  388.     blks_height = strip->height;

  389. 

  390.     if(ref_vectors != NULL) {

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

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

  393.     } else 

  394.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  395. 

  396.     if(cmd == 2) {

  397.       if(bit_pos <= 0) {

  398.         bit_pos = 8;

  399.         bit_buf = *buf1++;

  400.       }

  401. 

  402.       bit_pos -= 2;

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

  404. 

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

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

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

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

  409.           cur_frm_pos += 4;

  410.           ref_frm_pos += 4;

  411.         }

  412.       } else if(cmd != 1) 

  413.         return;

  414.     } else {

  415.       k = *buf1 >> 4;

  416.       j = *buf1 & 0x0f;

  417.       buf1++;

  418.       lv = j + fflags2;

  419. 

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

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

  422.         cp = ref_frm_pos;

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

  424.             int v = *cp >> 1;

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

  426.         }

  427.       }

  428. 

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

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

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

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

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

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

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

  436.       } else {

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

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

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

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

  441.       }

  442. 

  443.       switch(k) {

  444.         case 1:

  445.         case 0:                    /********** CASE 0 **********/

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

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

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

  449.                 k = *buf1++;

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

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

  452. 

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

  454.                   case 0:

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

  456.                     lp2++;

  457.                     break;

  458.                   case 1:

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

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

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

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

  463.                     lp2++;

  464.                     break;

  465.                   case 2:

  466.                     if(lp2 == 0) {

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

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

  469.                       lp2 += 2;

  470.                     }

  471.                     break;

  472.                   case 3:

  473.                     if(lp2 < 2) {

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

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

  476.                       lp2 = 3;

  477.                     }

  478.                     break;

  479.                   case 8:

  480.                     if(lp2 == 0) {

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

  482. 

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

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

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

  486.                       }

  487. 

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

  489.                       break;

  490.                     } else {

  491.                       rle_v1 = 1;

  492.                       rle_v2 = *buf1 - 1;

  493.                     }

  494.                   case 5:

  495.                       LP2_CHECK(buf1,rle_v3,lp2)

  496.                   case 4:

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

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

  499.                     lp2 = 4;

  500.                     break;

  501. 

  502.                   case 7:

  503.                     if(rle_v3 != 0) 

  504.                       rle_v3 = 0;

  505.                     else {

  506.                       buf1--;

  507.                       rle_v3 = 1;

  508.                     }

  509.                   case 6:

  510.                     if(ref_vectors != NULL) {

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

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

  513.                     }

  514.                     lp2 = 4;

  515.                     break;

  516. 

  517.                   case 9:

  518.                     lv1 = *buf1++;

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

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

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

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

  523.                       cur_lp[j] = lv;

  524. 

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

  526.                     break;

  527.                   default: 

  528.                     return;

  529.                 }

  530.               }

  531. 

  532.               cur_frm_pos += 4;

  533.               ref_frm_pos += 4;

  534.             }

  535. 

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

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

  538.           }

  539.           break;

  540. 

  541.         case 4:

  542.         case 3:                    /********** CASE 3 **********/

  543.           if(ref_vectors != NULL) 

  544.             return;

  545.           flag1 = 1;

  546. 

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

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

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

  550.                 k = *buf1++;

  551. 

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

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

  554. 

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

  556.                   case 0:

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

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

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

  560.                     else

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

  562.                     lp2++;

  563.                     break;

  564. 

  565.                   case 1:

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

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

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

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

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

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

  572.                     else

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

  574.                     lp2++;

  575.                     break;

  576. 

  577.                   case 2:

  578.                     if(lp2 == 0) {

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

  580.                         cur_lp[j] = *ref_lp;

  581.                       lp2 += 2;

  582.                     }

  583.                     break;

  584. 

  585.                   case 3:

  586.                     if(lp2 < 2) {

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

  588.                         cur_lp[j] = *ref_lp;

  589.                       lp2 = 3;

  590.                     }

  591.                     break;

  592. 

  593.                   case 6:

  594.                     lp2 = 4;

  595.                     break;

  596. 

  597.                   case 7:

  598.                     if(rle_v3 != 0) 

  599.                       rle_v3 = 0;

  600.                     else {

  601.                       buf1--;

  602.                       rle_v3 = 1;

  603.                     }

  604.                     lp2 = 4;

  605.                     break;

  606. 

  607.                   case 8:

  608.                     if(lp2 == 0) {

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

  610. 

  611.                       if(rle_v1 == 1) {

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

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

  614.                       }

  615. 

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

  617.                       break;

  618.                     } else {

  619.                       rle_v2 = (*buf1) - 1;

  620.                       rle_v1 = 1;

  621.                     }

  622.                   case 5:

  623.                       LP2_CHECK(buf1,rle_v3,lp2)

  624.                   case 4:

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

  626.                       cur_lp[j] = *ref_lp;

  627.                     lp2 = 4;

  628.                     break;

  629. 

  630.                   case 9:

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

  632.                     lv1 = *buf1++;

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

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

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

  636. 

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

  638.                       cur_lp[j] = lv;

  639. 

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

  641.                     break;

  642. 

  643.                   default: 

  644.                     return;

  645.                 }

  646.               }

  647. 

  648.               cur_frm_pos += 4;

  649.             }

  650. 

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

  652.             flag1 = 0;

  653.           }

  654.           break;

  655. 

  656.         case 10:                    /********** CASE 10 **********/

  657.           if(ref_vectors == NULL) {

  658.             flag1 = 1;

  659. 

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

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

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

  663.                   k = *buf1++;

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

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

  666.                   lv1 = ref_lp[0];

  667.                   lv2 = ref_lp[1];

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

  669.                     lv1 = lv1 & 0x00FF00FF;

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

  671.                     lv2 = lv2 & 0x00FF00FF;

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

  673.                   }

  674. 

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

  676.                     case 0:

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

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

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

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

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

  682.                       } else {

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

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

  685.                       }

  686.                       lp2++;

  687.                       break;

  688. 

  689.                     case 1:

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

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

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

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

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

  695.                       } else {

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

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

  698.                       }

  699.                       lp2++;

  700.                       break;

  701. 

  702.                     case 2:

  703.                       if(lp2 == 0) {

  704.                         if(flag1 != 0) {

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

  706.                             cur_lp[j] = lv1;

  707.                             cur_lp[j+1] = lv2;

  708.                           }

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

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

  711.                         } else {

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

  713.                             cur_lp[j] = lv1;

  714.                             cur_lp[j+1] = lv2;

  715.                           }

  716.                         }

  717.                         lp2 += 2;

  718.                       }

  719.                       break;

  720. 

  721.                     case 3:

  722.                       if(lp2 < 2) {

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

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

  725.                             cur_lp[j] = lv1;

  726.                             cur_lp[j+1] = lv2;

  727.                           }

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

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

  730.                         } else {

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

  732.                             cur_lp[j] = lv1;

  733.                             cur_lp[j+1] = lv2;

  734.                           }

  735.                         }

  736.                         lp2 = 3;

  737.                       }

  738.                       break;

  739. 

  740.                     case 8:

  741.                       if(lp2 == 0) {

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

  743.                         if(rle_v1 == 1) {

  744.                           if(flag1 != 0) {

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

  746.                               cur_lp[j] = lv1;

  747.                               cur_lp[j+1] = lv2;

  748.                             }

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

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

  751.                           } else {

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

  753.                               cur_lp[j] = lv1;

  754.                               cur_lp[j+1] = lv2;

  755.                             }

  756.                           }

  757.                         }

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

  759.                         break;

  760.                       } else {

  761.                         rle_v1 = 1;

  762.                         rle_v2 = (*buf1) - 1;

  763.                       }

  764.                     case 5:

  765.                         LP2_CHECK(buf1,rle_v3,lp2)

  766.                     case 4:

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

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

  769.                           cur_lp[j] = lv1;

  770.                           cur_lp[j+1] = lv2;

  771.                         }

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

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

  774.                       } else {

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

  776.                           cur_lp[j] = lv1;

  777.                           cur_lp[j+1] = lv2;

  778.                         }

  779.                       }

  780.                       lp2 = 4;

  781.                       break;

  782. 

  783.                     case 6:

  784.                       lp2 = 4;

  785.                       break;

  786. 

  787.                     case 7:

  788.                       if(lp2 == 0) {

  789.                         if(rle_v3 != 0) 

  790.                           rle_v3 = 0;

  791.                         else {

  792.                           buf1--;

  793.                           rle_v3 = 1;

  794.                         }

  795.                         lp2 = 4;

  796.                       }

  797.                       break;

  798. 

  799.                     case 9:

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

  801.                       lv1 = *buf1;

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

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

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

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

  806.                         cur_lp[j] = lv;

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

  808.                       break;

  809. 

  810.                     default: 

  811.                       return;

  812.                   }

  813.                 }

  814. 

  815.                 cur_frm_pos += 8;

  816.               }

  817. 

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

  819.               flag1 = 0;

  820.             }

  821.           } else {

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

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

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

  825.                   k = *buf1++;

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

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

  828. 

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

  830.                     case 0:

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

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

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

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

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

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

  837.                       lp2++;

  838.                       break;

  839. 

  840.                     case 1:

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

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

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

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

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

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

  847.                       lp2++;

  848.                       break;

  849. 

  850.                     case 2:

  851.                       if(lp2 == 0) {

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

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

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

  855.                         }

  856.                         lp2 += 2;

  857.                       }

  858.                       break;

  859. 

  860.                     case 3:

  861.                       if(lp2 < 2) {

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

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

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

  865.                         }

  866.                         lp2 = 3;

  867.                       }

  868.                       break;

  869. 

  870.                     case 8:

  871.                       if(lp2 == 0) {

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

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

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

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

  876.                         }

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

  878.                         break;

  879.                       } else {

  880.                         rle_v1 = 1;

  881.                         rle_v2 = (*buf1) - 1;

  882.                       }

  883.                     case 5:

  884.                     case 7:

  885.                         LP2_CHECK(buf1,rle_v3,lp2)

  886.                     case 6:

  887.                     case 4:

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

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

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

  891.                       }

  892.                       lp2 = 4;

  893.                       break;

  894. 

  895.                     case 9:

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

  897.                       lv1 = *buf1;

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

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

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

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

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

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

  904.                       break;

  905. 

  906.                     default: 

  907.                       return;

  908.                   }

  909.                 }

  910. 

  911.                 cur_frm_pos += 8;

  912.                 ref_frm_pos += 8;

  913.               }

  914. 

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

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

  917.             }

  918.           }

  919.           break;

  920. 

  921.         case 11:                    /********** CASE 11 **********/

  922.           if(ref_vectors == NULL) 

  923.             return;

  924. 

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

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

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

  928.                 k = *buf1++;

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

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

  931. 

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

  933.                   case 0:

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

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

  936.                     lp2++;

  937.                     break;

  938. 

  939.                   case 1:

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

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

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

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

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

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

  946.                     lp2++;

  947.                     break;

  948. 

  949.                   case 2:

  950.                     if(lp2 == 0) {

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

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

  953.                       lp2 += 2;

  954.                     }

  955.                     break;

  956. 

  957.                   case 3:

  958.                     if(lp2 < 2) {

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

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

  961.                       lp2 = 3;

  962.                     }

  963.                     break;

  964. 

  965.                   case 8:

  966.                     if(lp2 == 0) {

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

  968. 

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

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

  971. 

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

  973.                       break;

  974.                     } else {

  975.                       rle_v1 = 1;

  976.                       rle_v2 = (*buf1) - 1;

  977.                     }

  978.                   case 5:

  979.                   case 7:

  980.                       LP2_CHECK(buf1,rle_v3,lp2)

  981.                   case 4:

  982.                   case 6:

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

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

  985.                     lp2 = 4;

  986.                     break;

  987. 

  988.                 case 9:

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

  990.                   lv1 = *buf1++;

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

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

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

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

  995.                     cur_lp[j] = lv;

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

  997.                   break;

  998. 

  999.                   default: 

  1000.                     return;

  1001.                 }

  1002.               }

  1003. 

  1004.               cur_frm_pos += 4;

  1005.               ref_frm_pos += 4;

  1006.             }

  1007. 

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

  1009.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1010.           }

  1011.           break;

  1012. 

  1013.         default: 

  1014.           return;

  1015.       }

  1016.     }

  1017. 

  1018.     if(strip < strip_tbl) 

  1019.       return;

  1020. 

  1021.     for( ; strip >= strip_tbl; strip--) {

  1022.       if(strip->split_flag != 0) {

  1023.         strip->split_flag = 0;

  1024.         strip->usl7 = (strip-1)->usl7;

  1025. 

  1026.         if(strip->split_direction) {

  1027.           strip->xpos += strip->width;

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

  1029.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1030.             strip->width = width - strip->xpos;

  1031.         } else {

  1032.           strip->ypos += strip->height;

  1033.           strip->height = (strip-1)->height - strip->height;

  1034.         }

  1035.         break;

  1036.       }

  1037.     }

  1038.   }

  1039. }

  1040. 

  1041. static int indeo3_decode_init(AVCodecContext *avctx)

  1042. {

  1043.     Indeo3DecodeContext *s = avctx->priv_data;

  1044. 

  1045.     s->avctx = avctx;

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

  1047.     s->height = avctx->height;

  1048.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1049.     avctx->has_b_frames = 0;

  1050. 

  1051.     build_modpred(s);

  1052.     iv_alloc_frames(s);

  1053. 

  1054.     return 0;

  1055. }

  1056. 

  1057. static int indeo3_decode_frame(AVCodecContext *avctx,

  1058.                                void *data, int *data_size,

  1059.                                unsigned char *buf, int buf_size)

  1060. {

  1061.     Indeo3DecodeContext *s=avctx->priv_data;

  1062.     unsigned char *src, *dest;

  1063.     int y;

  1064. 

  1065.     /* no supplementary picture */

  1066.     if (buf_size == 0) {

  1067.         return 0;

  1068.     }

  1069. 

  1070.     iv_decode_frame(s, buf, buf_size);

  1071. 

  1072.     if(s->frame.data[0])

  1073.         avctx->release_buffer(avctx, &s->frame);

  1074. 

  1075.     s->frame.reference = 0;

  1076.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1077.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1078.         return -1;

  1079.     }

  1080. 

  1081.     src = s->cur_frame->Ybuf;

  1082.     dest = s->frame.data[0];

  1083.     for (y = 0; y < s->height; y++) {

  1084.       memcpy(dest, src, s->cur_frame->y_w);

  1085.       src += s->cur_frame->y_w;

  1086.       dest += s->frame.linesize[0];

  1087.     }

  1088. 

  1089.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1090.     {

  1091.     src = s->cur_frame->Ubuf;

  1092.     dest = s->frame.data[1];

  1093.     for (y = 0; y < s->height / 4; y++) {

  1094.       memcpy(dest, src, s->cur_frame->uv_w);

  1095.       src += s->cur_frame->uv_w;

  1096.       dest += s->frame.linesize[1];

  1097.     }

  1098. 

  1099.     src = s->cur_frame->Vbuf;

  1100.     dest = s->frame.data[2];

  1101.     for (y = 0; y < s->height / 4; y++) {

  1102.       memcpy(dest, src, s->cur_frame->uv_w);

  1103.       src += s->cur_frame->uv_w;

  1104.       dest += s->frame.linesize[2];

  1105.     }

  1106.     }

  1107. 

  1108.     *data_size=sizeof(AVFrame);

  1109.     *(AVFrame*)data= s->frame;

  1110. 

  1111.     return buf_size;

  1112. }

  1113. 

  1114. static int indeo3_decode_end(AVCodecContext *avctx)

  1115. {

  1116.     Indeo3DecodeContext *s = avctx->priv_data;

  1117. 

  1118.     iv_free_func(s);

  1119. 

  1120.     return 0;

  1121. }

  1122. 

  1123. AVCodec indeo3_decoder = {

  1124.     "indeo3",

  1125.     CODEC_TYPE_VIDEO,

  1126.     CODEC_ID_INDEO3,

  1127.     sizeof(Indeo3DecodeContext),

  1128.     indeo3_decode_init,

  1129.     NULL,

  1130.     indeo3_decode_end,

  1131.     indeo3_decode_frame,

  1132.     0,

  1133.     NULL

  1134. };