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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 file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. #include <stdio.h>

  23. #include <stdlib.h>

  24. #include <string.h>

  25. #include <unistd.h>

  26. 

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "mpegvideo.h"

  30. 

  31. #include "indeo3data.h"

  32. 

  33. typedef struct

  34. {

  35.   unsigned char *Ybuf;

  36.   unsigned char *Ubuf;

  37.   unsigned char *Vbuf;

  38.   unsigned char *the_buf;

  39.   unsigned int the_buf_size;

  40.   unsigned short y_w, y_h;

  41.   unsigned short uv_w, uv_h;

  42. } YUVBufs;

  43. 

  44. typedef struct Indeo3DecodeContext {

  45.     AVCodecContext *avctx;

  46.     int width, height;

  47.     AVFrame frame;

  48. 

  49.     YUVBufs iv_frame[2];

  50.     YUVBufs *cur_frame;

  51.     YUVBufs *ref_frame;

  52. 

  53.     unsigned char *ModPred;

  54.     unsigned short *corrector_type;

  55. } Indeo3DecodeContext;

  56. 

  57. static int corrector_type_0[24] = {

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

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

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

  61. };

  62. 

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

  64. 

  65. static void build_modpred(Indeo3DecodeContext *s)

  66. {

  67.   int i, j;

  68. 

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

  70. 

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

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

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

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

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

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

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

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

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

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

  81.   }

  82. 

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

  84. 

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

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

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

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

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

  90.     }

  91.   }

  92. }

  93. 

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

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

  96.   long fflags2, unsigned char *hdr,

  97.   unsigned char *buf2, int min_width_160);

  98. 

  99. /* ---------------------------------------------------------------------- */

  100. static void iv_alloc_frames(Indeo3DecodeContext *s)

  101. {

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

  103.       chroma_pixels, i;

  104.   unsigned int bufsize;

  105. 

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

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

  108. 

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

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

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

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

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

  114. 

  115.   chroma_width  = ((luma_width >> 2) + 3) & (~3);

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

  117.   luma_pixels = luma_width * luma_height;

  118.   chroma_pixels = chroma_width * chroma_height;

  119. 

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

  121.     (chroma_pixels + chroma_width) * 4;

  122. 

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

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

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

  126.     return;

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

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

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

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

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

  132. 

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

  134.   i = luma_pixels + luma_width * 2;

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

  136.   i += (luma_pixels + luma_width);

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

  138.   i += (chroma_pixels + chroma_width);

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

  140.   i += (chroma_pixels + chroma_width);

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

  142.   i += (chroma_pixels + chroma_width);

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

  144. 

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

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

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

  148. 

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

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

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

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

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

  154.   }

  155. }

  156. 

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

  158. static void iv_free_func(Indeo3DecodeContext *s)

  159. {

  160.   int i;

  161. 

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

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

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

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

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

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

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

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

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

  171.   }

  172. 

  173.   av_free(s->ModPred);

  174.   av_free(s->corrector_type);

  175. }

  176. 

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

  178. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  179.                                      unsigned char *buf, int buf_size)

  180. {

  181.   unsigned int hdr_width, hdr_height,

  182.     chroma_width, chroma_height;

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

  184.   unsigned char *hdr_pos, *buf_pos;

  185. 

  186.   buf_pos = buf;

  187.   buf_pos += 18;

  188. 

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

  190.   buf_pos += 2;

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

  192.   buf_pos += 4;

  193.   fflags2 = *buf_pos++;

  194.   buf_pos += 3;

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

  196.   buf_pos += 2;

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

  198. 

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

  200.       return -1;

  201. 

  202.   buf_pos += 2;

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

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

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

  206.   buf_pos += 4;

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

  208.   buf_pos += 4;

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

  210.   buf_pos += 8;

  211.   hdr_pos = buf_pos;

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

  213. 

  214.   if(fflags1 & 0x200) {

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

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

  217.   } else {

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

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

  220.   }

  221. 

  222.   buf_pos = buf + 16 + offs1;

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

  224.   buf_pos += 4;

  225. 

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

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

  228.     FFMIN(hdr_width, 160));

  229. 

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

  231.   {

  232. 

  233.   buf_pos = buf + 16 + offs2;

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

  235.   buf_pos += 4;

  236. 

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

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

  239.     FFMIN(chroma_width, 40));

  240. 

  241.   buf_pos = buf + 16 + offs3;

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

  243.   buf_pos += 4;

  244. 

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

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

  247.     FFMIN(chroma_width, 40));

  248. 

  249.   }

  250. 

  251.   return 8;

  252. }

  253. 

  254. typedef struct {

  255.   long xpos;

  256.   long ypos;

  257.   long width;

  258.   long height;

  259.   long split_flag;

  260.   long split_direction;

  261.   long usl7;

  262. } ustr_t;

  263. 

  264. /* ---------------------------------------------------------------------- */

  265. 

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

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

  268.     if(rle_v3 != 0)         \

  269.       rle_v3 = 0;           \

  270.     else {                  \

  271.       rle_v3 = 1;           \

  272.       buf1 -= 2;            \

  273.     }                       \

  274.   }                         \

  275.   lp2 = 4;

  276. 

  277. 

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

  279.   if(rle_v3 == 0) {         \

  280.     rle_v2 = *buf1;         \

  281.     rle_v1 = 1;             \

  282.     if(rle_v2 > 32) {       \

  283.       rle_v2 -= 32;         \

  284.       rle_v1 = 0;           \

  285.     }                       \

  286.     rle_v3 = 1;             \

  287.   }                         \

  288.   buf1--;

  289. 

  290. 

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

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

  293.     rle_v3 = 0;           \

  294.   else {                  \

  295.     buf1--;               \

  296.     rle_v3 = 1;           \

  297.   }

  298. 

  299. 

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

  301.   rle_v2--;             \

  302.   if(rle_v2 == 0) {     \

  303.     rle_v3 = 0;         \

  304.     buf1 += 2;          \

  305.   }                     \

  306.   lp2 = 4;

  307. 

  308. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  311.   unsigned char *buf2, int min_width_160)

  312. {

  313.   unsigned char bit_buf;

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

  315.   long *width_tbl, width_tbl_arr[10];

  316.   signed char *ref_vectors;

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

  318.   uint32_t *cur_lp, *ref_lp;

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

  320.   unsigned short *correction_type_sp[2];

  321.   ustr_t strip_tbl[20], *strip;

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

  323.     rle_v1, rle_v2, rle_v3;

  324.   unsigned short res;

  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 = (signed char*)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 = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);

  460.                     lp2++;

  461.                     break;

  462.                   case 1:

  463.                     res = ((le2me_16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;

  464.                     ((unsigned short *)cur_lp)[0] = le2me_16(res);

  465.                     res = ((le2me_16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  466.                     ((unsigned short *)cur_lp)[1] = le2me_16(res);

  467.                     buf1++;

  468.                     lp2++;

  469.                     break;

  470.                   case 2:

  471.                     if(lp2 == 0) {

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

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

  474.                       lp2 += 2;

  475.                     }

  476.                     break;

  477.                   case 3:

  478.                     if(lp2 < 2) {

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

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

  481.                       lp2 = 3;

  482.                     }

  483.                     break;

  484.                   case 8:

  485.                     if(lp2 == 0) {

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

  487. 

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

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

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

  491.                       }

  492. 

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

  494.                       break;

  495.                     } else {

  496.                       rle_v1 = 1;

  497.                       rle_v2 = *buf1 - 1;

  498.                     }

  499.                   case 5:

  500.                       LP2_CHECK(buf1,rle_v3,lp2)

  501.                   case 4:

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

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

  504.                     lp2 = 4;

  505.                     break;

  506. 

  507.                   case 7:

  508.                     if(rle_v3 != 0)

  509.                       rle_v3 = 0;

  510.                     else {

  511.                       buf1--;

  512.                       rle_v3 = 1;

  513.                     }

  514.                   case 6:

  515.                     if(ref_vectors != NULL) {

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

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

  518.                     }

  519.                     lp2 = 4;

  520.                     break;

  521. 

  522.                   case 9:

  523.                     lv1 = *buf1++;

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

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

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

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

  528.                       cur_lp[j] = lv;

  529. 

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

  531.                     break;

  532.                   default:

  533.                     return;

  534.                 }

  535.               }

  536. 

  537.               cur_frm_pos += 4;

  538.               ref_frm_pos += 4;

  539.             }

  540. 

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

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

  543.           }

  544.           break;

  545. 

  546.         case 4:

  547.         case 3:                    /********** CASE 3 **********/

  548.           if(ref_vectors != NULL)

  549.             return;

  550.           flag1 = 1;

  551. 

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

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

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

  555.                 k = *buf1++;

  556. 

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

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

  559. 

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

  561.                   case 0:

  562.                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);

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

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

  565.                     else

  566.                       cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);

  567.                     lp2++;

  568.                     break;

  569. 

  570.                   case 1:

  571.                     res = ((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;

  572.                     ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);

  573.                     res = ((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;

  574.                     ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);

  575. 

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

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

  578.                     else

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

  580.                     buf1++;

  581.                     lp2++;

  582.                     break;

  583. 

  584.                   case 2:

  585.                     if(lp2 == 0) {

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

  587.                         cur_lp[j] = *ref_lp;

  588.                       lp2 += 2;

  589.                     }

  590.                     break;

  591. 

  592.                   case 3:

  593.                     if(lp2 < 2) {

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

  595.                         cur_lp[j] = *ref_lp;

  596.                       lp2 = 3;

  597.                     }

  598.                     break;

  599. 

  600.                   case 6:

  601.                     lp2 = 4;

  602.                     break;

  603. 

  604.                   case 7:

  605.                     if(rle_v3 != 0)

  606.                       rle_v3 = 0;

  607.                     else {

  608.                       buf1--;

  609.                       rle_v3 = 1;

  610.                     }

  611.                     lp2 = 4;

  612.                     break;

  613. 

  614.                   case 8:

  615.                     if(lp2 == 0) {

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

  617. 

  618.                       if(rle_v1 == 1) {

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

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

  621.                       }

  622. 

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

  624.                       break;

  625.                     } else {

  626.                       rle_v2 = (*buf1) - 1;

  627.                       rle_v1 = 1;

  628.                     }

  629.                   case 5:

  630.                       LP2_CHECK(buf1,rle_v3,lp2)

  631.                   case 4:

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

  633.                       cur_lp[j] = *ref_lp;

  634.                     lp2 = 4;

  635.                     break;

  636. 

  637.                   case 9:

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

  639.                     lv1 = *buf1++;

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

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

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

  643. 

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

  645.                       cur_lp[j] = lv;

  646. 

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

  648.                     break;

  649. 

  650.                   default:

  651.                     return;

  652.                 }

  653.               }

  654. 

  655.               cur_frm_pos += 4;

  656.             }

  657. 

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

  659.             flag1 = 0;

  660.           }

  661.           break;

  662. 

  663.         case 10:                    /********** CASE 10 **********/

  664.           if(ref_vectors == NULL) {

  665.             flag1 = 1;

  666. 

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

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

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

  670.                   k = *buf1++;

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

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

  673.                   lv1 = ref_lp[0];

  674.                   lv2 = ref_lp[1];

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

  676. #ifdef WORDS_BIGENDIAN

  677.                     lv1 = lv1 & 0xFF00FF00;

  678.                     lv1 = (lv1 >> 8) | lv1;

  679.                     lv2 = lv2 & 0xFF00FF00;

  680.                     lv2 = (lv2 >> 8) | lv2;

  681. #else

  682.                     lv1 = lv1 & 0x00FF00FF;

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

  684.                     lv2 = lv2 & 0x00FF00FF;

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

  686. #endif

  687.                   }

  688. 

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

  690.                     case 0:

  691.                       cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);

  692.                       cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);

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

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

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

  696.                       } else {

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

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

  699.                       }

  700.                       lp2++;

  701.                       break;

  702. 

  703.                     case 1:

  704.                       cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);

  705.                       cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);

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

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

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

  709.                       } else {

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

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

  712.                       }

  713.                       buf1++;

  714.                       lp2++;

  715.                       break;

  716. 

  717.                     case 2:

  718.                       if(lp2 == 0) {

  719.                         if(flag1 != 0) {

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

  721.                             cur_lp[j] = lv1;

  722.                             cur_lp[j+1] = lv2;

  723.                           }

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

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

  726.                         } else {

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

  728.                             cur_lp[j] = lv1;

  729.                             cur_lp[j+1] = lv2;

  730.                           }

  731.                         }

  732.                         lp2 += 2;

  733.                       }

  734.                       break;

  735. 

  736.                     case 3:

  737.                       if(lp2 < 2) {

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

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

  740.                             cur_lp[j] = lv1;

  741.                             cur_lp[j+1] = lv2;

  742.                           }

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

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

  745.                         } else {

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

  747.                             cur_lp[j] = lv1;

  748.                             cur_lp[j+1] = lv2;

  749.                           }

  750.                         }

  751.                         lp2 = 3;

  752.                       }

  753.                       break;

  754. 

  755.                     case 8:

  756.                       if(lp2 == 0) {

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

  758.                         if(rle_v1 == 1) {

  759.                           if(flag1 != 0) {

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

  761.                               cur_lp[j] = lv1;

  762.                               cur_lp[j+1] = lv2;

  763.                             }

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

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

  766.                           } else {

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

  768.                               cur_lp[j] = lv1;

  769.                               cur_lp[j+1] = lv2;

  770.                             }

  771.                           }

  772.                         }

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

  774.                         break;

  775.                       } else {

  776.                         rle_v1 = 1;

  777.                         rle_v2 = (*buf1) - 1;

  778.                       }

  779.                     case 5:

  780.                         LP2_CHECK(buf1,rle_v3,lp2)

  781.                     case 4:

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

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

  784.                           cur_lp[j] = lv1;

  785.                           cur_lp[j+1] = lv2;

  786.                         }

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

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

  789.                       } else {

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

  791.                           cur_lp[j] = lv1;

  792.                           cur_lp[j+1] = lv2;

  793.                         }

  794.                       }

  795.                       lp2 = 4;

  796.                       break;

  797. 

  798.                     case 6:

  799.                       lp2 = 4;

  800.                       break;

  801. 

  802.                     case 7:

  803.                       if(lp2 == 0) {

  804.                         if(rle_v3 != 0)

  805.                           rle_v3 = 0;

  806.                         else {

  807.                           buf1--;

  808.                           rle_v3 = 1;

  809.                         }

  810.                         lp2 = 4;

  811.                       }

  812.                       break;

  813. 

  814.                     case 9:

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

  816.                       lv1 = *buf1;

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

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

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

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

  821.                         cur_lp[j] = lv;

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

  823.                       break;

  824. 

  825.                     default:

  826.                       return;

  827.                   }

  828.                 }

  829. 

  830.                 cur_frm_pos += 8;

  831.               }

  832. 

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

  834.               flag1 = 0;

  835.             }

  836.           } else {

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

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

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

  840.                   k = *buf1++;

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

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

  843. 

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

  845.                     case 0:

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

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

  848.                       cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);

  849.                       cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);

  850.                       cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);

  851.                       cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);

  852.                       lp2++;

  853.                       break;

  854. 

  855.                     case 1:

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

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

  858.                       cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);

  859.                       cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);

  860.                       cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);

  861.                       cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);

  862.                       lp2++;

  863.                       break;

  864. 

  865.                     case 2:

  866.                       if(lp2 == 0) {

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

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

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

  870.                         }

  871.                         lp2 += 2;

  872.                       }

  873.                       break;

  874. 

  875.                     case 3:

  876.                       if(lp2 < 2) {

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

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

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

  880.                         }

  881.                         lp2 = 3;

  882.                       }

  883.                       break;

  884. 

  885.                     case 8:

  886.                       if(lp2 == 0) {

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

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

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

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

  891.                         }

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

  893.                         break;

  894.                       } else {

  895.                         rle_v1 = 1;

  896.                         rle_v2 = (*buf1) - 1;

  897.                       }

  898.                     case 5:

  899.                     case 7:

  900.                         LP2_CHECK(buf1,rle_v3,lp2)

  901.                     case 6:

  902.                     case 4:

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

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

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

  906.                       }

  907.                       lp2 = 4;

  908.                       break;

  909. 

  910.                     case 9:

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

  912.                       lv1 = *buf1;

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

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

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

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

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

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

  919.                       break;

  920. 

  921.                     default:

  922.                       return;

  923.                   }

  924.                 }

  925. 

  926.                 cur_frm_pos += 8;

  927.                 ref_frm_pos += 8;

  928.               }

  929. 

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

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

  932.             }

  933.           }

  934.           break;

  935. 

  936.         case 11:                    /********** CASE 11 **********/

  937.           if(ref_vectors == NULL)

  938.             return;

  939. 

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

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

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

  943.                 k = *buf1++;

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

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

  946. 

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

  948.                   case 0:

  949.                     cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);

  950.                     cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);

  951.                     lp2++;

  952.                     break;

  953. 

  954.                   case 1:

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

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

  957.                     res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);

  958.                     ((unsigned short *)cur_lp)[0] = le2me_16(res);

  959.                     res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);

  960.                     ((unsigned short *)cur_lp)[1] = le2me_16(res);

  961.                     res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);

  962.                     ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);

  963.                     res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);

  964.                     ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);

  965.                     lp2++;

  966.                     break;

  967. 

  968.                   case 2:

  969.                     if(lp2 == 0) {

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

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

  972.                       lp2 += 2;

  973.                     }

  974.                     break;

  975. 

  976.                   case 3:

  977.                     if(lp2 < 2) {

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

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

  980.                       lp2 = 3;

  981.                     }

  982.                     break;

  983. 

  984.                   case 8:

  985.                     if(lp2 == 0) {

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

  987. 

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

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

  990. 

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

  992.                       break;

  993.                     } else {

  994.                       rle_v1 = 1;

  995.                       rle_v2 = (*buf1) - 1;

  996.                     }

  997.                   case 5:

  998.                   case 7:

  999.                       LP2_CHECK(buf1,rle_v3,lp2)

  1000.                   case 4:

  1001.                   case 6:

  1002.                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])

  1003.                       cur_lp[j] = ref_lp[j];

  1004.                     lp2 = 4;

  1005.                     break;

  1006. 

  1007.                 case 9:

  1008.                   av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  1009.                   lv1 = *buf1++;

  1010.                   lv = (lv1 & 0x7F) << 1;

  1011.                   lv += (lv << 8);

  1012.                   lv += (lv << 16);

  1013.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  1014.                     cur_lp[j] = lv;

  1015.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1016.                   break;

  1017. 

  1018.                   default:

  1019.                     return;

  1020.                 }

  1021.               }

  1022. 

  1023.               cur_frm_pos += 4;

  1024.               ref_frm_pos += 4;

  1025.             }

  1026. 

  1027.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1028.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1029.           }

  1030.           break;

  1031. 

  1032.         default:

  1033.           return;

  1034.       }

  1035.     }

  1036. 

  1037.     if(strip < strip_tbl)

  1038.       return;

  1039. 

  1040.     for( ; strip >= strip_tbl; strip--) {

  1041.       if(strip->split_flag != 0) {

  1042.         strip->split_flag = 0;

  1043.         strip->usl7 = (strip-1)->usl7;

  1044. 

  1045.         if(strip->split_direction) {

  1046.           strip->xpos += strip->width;

  1047.           strip->width = (strip-1)->width - strip->width;

  1048.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1049.             strip->width = width - strip->xpos;

  1050.         } else {

  1051.           strip->ypos += strip->height;

  1052.           strip->height = (strip-1)->height - strip->height;

  1053.         }

  1054.         break;

  1055.       }

  1056.     }

  1057.   }

  1058. }

  1059. 

  1060. static int indeo3_decode_init(AVCodecContext *avctx)

  1061. {

  1062.     Indeo3DecodeContext *s = avctx->priv_data;

  1063. 

  1064.     s->avctx = avctx;

  1065.     s->width = avctx->width;

  1066.     s->height = avctx->height;

  1067.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1068. 

  1069.     build_modpred(s);

  1070.     iv_alloc_frames(s);

  1071. 

  1072.     return 0;

  1073. }

  1074. 

  1075. static int indeo3_decode_frame(AVCodecContext *avctx,

  1076.                                void *data, int *data_size,

  1077.                                unsigned char *buf, int buf_size)

  1078. {

  1079.     Indeo3DecodeContext *s=avctx->priv_data;

  1080.     unsigned char *src, *dest;

  1081.     int y;

  1082. 

  1083.     iv_decode_frame(s, buf, buf_size);

  1084. 

  1085.     if(s->frame.data[0])

  1086.         avctx->release_buffer(avctx, &s->frame);

  1087. 

  1088.     s->frame.reference = 0;

  1089.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1090.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1091.         return -1;

  1092.     }

  1093. 

  1094.     src = s->cur_frame->Ybuf;

  1095.     dest = s->frame.data[0];

  1096.     for (y = 0; y < s->height; y++) {

  1097.       memcpy(dest, src, s->cur_frame->y_w);

  1098.       src += s->cur_frame->y_w;

  1099.       dest += s->frame.linesize[0];

  1100.     }

  1101. 

  1102.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1103.     {

  1104.     src = s->cur_frame->Ubuf;

  1105.     dest = s->frame.data[1];

  1106.     for (y = 0; y < s->height / 4; y++) {

  1107.       memcpy(dest, src, s->cur_frame->uv_w);

  1108.       src += s->cur_frame->uv_w;

  1109.       dest += s->frame.linesize[1];

  1110.     }

  1111. 

  1112.     src = s->cur_frame->Vbuf;

  1113.     dest = s->frame.data[2];

  1114.     for (y = 0; y < s->height / 4; y++) {

  1115.       memcpy(dest, src, s->cur_frame->uv_w);

  1116.       src += s->cur_frame->uv_w;

  1117.       dest += s->frame.linesize[2];

  1118.     }

  1119.     }

  1120. 

  1121.     *data_size=sizeof(AVFrame);

  1122.     *(AVFrame*)data= s->frame;

  1123. 

  1124.     return buf_size;

  1125. }

  1126. 

  1127. static int indeo3_decode_end(AVCodecContext *avctx)

  1128. {

  1129.     Indeo3DecodeContext *s = avctx->priv_data;

  1130. 

  1131.     iv_free_func(s);

  1132. 

  1133.     return 0;

  1134. }

  1135. 

  1136. AVCodec indeo3_decoder = {

  1137.     "indeo3",

  1138.     CODEC_TYPE_VIDEO,

  1139.     CODEC_ID_INDEO3,

  1140.     sizeof(Indeo3DecodeContext),

  1141.     indeo3_decode_init,

  1142.     NULL,

  1143.     indeo3_decode_end,

  1144.     indeo3_decode_frame,

  1145.     0,

  1146.     NULL

  1147. };