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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. #include "bytestream.h"

  31. 

  32. #include "indeo3data.h"

  33. 

  34. typedef struct

  35. {

  36.   unsigned char *Ybuf;

  37.   unsigned char *Ubuf;

  38.   unsigned char *Vbuf;

  39.   unsigned char *the_buf;

  40.   unsigned int the_buf_size;

  41.   unsigned short y_w, y_h;

  42.   unsigned short uv_w, uv_h;

  43. } YUVBufs;

  44. 

  45. typedef struct Indeo3DecodeContext {

  46.     AVCodecContext *avctx;

  47.     int width, height;

  48.     AVFrame frame;

  49. 

  50.     YUVBufs iv_frame[2];

  51.     YUVBufs *cur_frame;

  52.     YUVBufs *ref_frame;

  53. 

  54.     unsigned char *ModPred;

  55.     unsigned short *corrector_type;

  56. } Indeo3DecodeContext;

  57. 

  58. static const int corrector_type_0[24] = {

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

  60.   195, 159, 133, 115, 101,  93,  87,  77,

  61.   128,  79,  79,  79,  79,  79,  79,  79

  62. };

  63. 

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

  65. 

  66. static void build_modpred(Indeo3DecodeContext *s)

  67. {

  68.   int i, j;

  69. 

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

  71. 

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

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

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

  75.                                  ? 236 : 2*((i + 2) - ((i + 1) % 3)));

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

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

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

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

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

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

  82.   }

  83. 

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

  85. 

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

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

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

  89.                                 ? 1 : ((j < 248 || (i == 16 && j == 248))

  90.                                        ? 0 : corrector_type_2[j - 248]);

  91.     }

  92.   }

  93. }

  94. 

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

  96.   unsigned char *ref, int width, int height, const unsigned char *buf1,

  97.   long fflags2, const unsigned char *hdr,

  98.   const unsigned char *buf2, int min_width_160);

  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.                                      const 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.   const unsigned char *hdr_pos, *buf_pos;

  186. 

  187.   buf_pos = buf;

  188.   buf_pos += 18;

  189. 

  190.   fflags1 = bytestream_get_le16(&buf_pos);

  191.   fflags3 = bytestream_get_le32(&buf_pos);

  192.   fflags2 = *buf_pos++;

  193.   buf_pos += 3;

  194.   hdr_height = bytestream_get_le16(&buf_pos);

  195.   hdr_width  = bytestream_get_le16(&buf_pos);

  196. 

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

  198.       return -1;

  199. 

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

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

  202.   offs1 = bytestream_get_le32(&buf_pos);

  203.   offs2 = bytestream_get_le32(&buf_pos);

  204.   offs3 = bytestream_get_le32(&buf_pos);

  205.   buf_pos += 4;

  206.   hdr_pos = buf_pos;

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

  208. 

  209.   if(fflags1 & 0x200) {

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

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

  212.   } else {

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

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

  215.   }

  216. 

  217.   buf_pos = buf + 16 + offs1;

  218.   offs = bytestream_get_le32(&buf_pos);

  219. 

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

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

  222.     FFMIN(hdr_width, 160));

  223. 

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

  225.   {

  226. 

  227.   buf_pos = buf + 16 + offs2;

  228.   offs = bytestream_get_le32(&buf_pos);

  229. 

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

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

  232.     FFMIN(chroma_width, 40));

  233. 

  234.   buf_pos = buf + 16 + offs3;

  235.   offs = bytestream_get_le32(&buf_pos);

  236. 

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

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

  239.     FFMIN(chroma_width, 40));

  240. 

  241.   }

  242. 

  243.   return 8;

  244. }

  245. 

  246. typedef struct {

  247.   long xpos;

  248.   long ypos;

  249.   long width;

  250.   long height;

  251.   long split_flag;

  252.   long split_direction;

  253.   long usl7;

  254. } ustr_t;

  255. 

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

  257. 

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

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

  260.     if(rle_v3 != 0)         \

  261.       rle_v3 = 0;           \

  262.     else {                  \

  263.       rle_v3 = 1;           \

  264.       buf1 -= 2;            \

  265.     }                       \

  266.   }                         \

  267.   lp2 = 4;

  268. 

  269. 

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

  271.   if(rle_v3 == 0) {         \

  272.     rle_v2 = *buf1;         \

  273.     rle_v1 = 1;             \

  274.     if(rle_v2 > 32) {       \

  275.       rle_v2 -= 32;         \

  276.       rle_v1 = 0;           \

  277.     }                       \

  278.     rle_v3 = 1;             \

  279.   }                         \

  280.   buf1--;

  281. 

  282. 

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

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

  285.     rle_v3 = 0;           \

  286.   else {                  \

  287.     buf1--;               \

  288.     rle_v3 = 1;           \

  289.   }

  290. 

  291. 

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

  293.   rle_v2--;             \

  294.   if(rle_v2 == 0) {     \

  295.     rle_v3 = 0;         \

  296.     buf1 += 2;          \

  297.   }                     \

  298.   lp2 = 4;

  299. 

  300. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  303.   const unsigned char *buf2, int min_width_160)

  304. {

  305.   unsigned char bit_buf;

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

  307.   long *width_tbl, width_tbl_arr[10];

  308.   const signed char *ref_vectors;

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

  310.   uint32_t *cur_lp, *ref_lp;

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

  312.   unsigned short *correction_type_sp[2];

  313.   ustr_t strip_tbl[20], *strip;

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

  315.     rle_v1, rle_v2, rle_v3;

  316.   unsigned short res;

  317. 

  318.   bit_buf = 0;

  319.   ref_vectors = NULL;

  320. 

  321.   width_tbl = width_tbl_arr + 1;

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

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

  324.     width_tbl[j] = i * j;

  325. 

  326.   strip = strip_tbl;

  327. 

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

  329. 

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

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

  332.   strip->height = height;

  333.   strip->split_direction = 0;

  334.   strip->split_flag = 0;

  335.   strip->usl7 = 0;

  336. 

  337.   bit_pos = 0;

  338. 

  339.   rle_v1 = rle_v2 = rle_v3 = 0;

  340. 

  341.   while(strip >= strip_tbl) {

  342.     if(bit_pos <= 0) {

  343.       bit_pos = 8;

  344.       bit_buf = *buf1++;

  345.     }

  346. 

  347.     bit_pos -= 2;

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

  349. 

  350.     if(cmd == 0) {

  351.       strip++;

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

  353.       strip->split_flag = 1;

  354.       strip->split_direction = 0;

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

  356.       continue;

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

  358.       strip++;

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

  360.       strip->split_flag = 1;

  361.       strip->split_direction = 1;

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

  363.       continue;

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

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

  366.         strip->usl7 = 1;

  367.         ref_vectors = NULL;

  368.         continue;

  369.       }

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

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

  372.         strip->usl7 = 1;

  373.         ref_vectors = (const signed char*)buf2 + (*buf1 * 2);

  374.         buf1++;

  375.         continue;

  376.       }

  377.     }

  378. 

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

  380. 

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

  382.       blks_width += 3;

  383.     blks_width >>= 2;

  384.     blks_height = strip->height;

  385. 

  386.     if(ref_vectors != NULL) {

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

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

  389.     } else

  390.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  391. 

  392.     if(cmd == 2) {

  393.       if(bit_pos <= 0) {

  394.         bit_pos = 8;

  395.         bit_buf = *buf1++;

  396.       }

  397. 

  398.       bit_pos -= 2;

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

  400. 

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

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

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

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

  405.           cur_frm_pos += 4;

  406.           ref_frm_pos += 4;

  407.         }

  408.       } else if(cmd != 1)

  409.         return;

  410.     } else {

  411.       k = *buf1 >> 4;

  412.       j = *buf1 & 0x0f;

  413.       buf1++;

  414.       lv = j + fflags2;

  415. 

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

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

  418.         cp = ref_frm_pos;

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

  420.             int v = *cp >> 1;

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

  422.         }

  423.       }

  424. 

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

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

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

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

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

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

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

  432.       } else {

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

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

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

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

  437.       }

  438. 

  439.       switch(k) {

  440.         case 1:

  441.         case 0:                    /********** CASE 0 **********/

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

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

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

  445.                 k = *buf1++;

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

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

  448. 

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

  450.                   case 0:

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

  452.                     lp2++;

  453.                     break;

  454.                   case 1:

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

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

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

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

  459.                     buf1++;

  460.                     lp2++;

  461.                     break;

  462.                   case 2:

  463.                     if(lp2 == 0) {

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

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

  466.                       lp2 += 2;

  467.                     }

  468.                     break;

  469.                   case 3:

  470.                     if(lp2 < 2) {

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

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

  473.                       lp2 = 3;

  474.                     }

  475.                     break;

  476.                   case 8:

  477.                     if(lp2 == 0) {

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

  479. 

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

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

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

  483.                       }

  484. 

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

  486.                       break;

  487.                     } else {

  488.                       rle_v1 = 1;

  489.                       rle_v2 = *buf1 - 1;

  490.                     }

  491.                   case 5:

  492.                       LP2_CHECK(buf1,rle_v3,lp2)

  493.                   case 4:

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

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

  496.                     lp2 = 4;

  497.                     break;

  498. 

  499.                   case 7:

  500.                     if(rle_v3 != 0)

  501.                       rle_v3 = 0;

  502.                     else {

  503.                       buf1--;

  504.                       rle_v3 = 1;

  505.                     }

  506.                   case 6:

  507.                     if(ref_vectors != NULL) {

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

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

  510.                     }

  511.                     lp2 = 4;

  512.                     break;

  513. 

  514.                   case 9:

  515.                     lv1 = *buf1++;

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

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

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

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

  520.                       cur_lp[j] = lv;

  521. 

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

  523.                     break;

  524.                   default:

  525.                     return;

  526.                 }

  527.               }

  528. 

  529.               cur_frm_pos += 4;

  530.               ref_frm_pos += 4;

  531.             }

  532. 

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

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

  535.           }

  536.           break;

  537. 

  538.         case 4:

  539.         case 3:                    /********** CASE 3 **********/

  540.           if(ref_vectors != NULL)

  541.             return;

  542.           flag1 = 1;

  543. 

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

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

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

  547.                 k = *buf1++;

  548. 

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

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

  551. 

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

  553.                   case 0:

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

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

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

  557.                     else

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

  559.                     lp2++;

  560.                     break;

  561. 

  562.                   case 1:

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

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

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

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

  567. 

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

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

  570.                     else

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

  572.                     buf1++;

  573.                     lp2++;

  574.                     break;

  575. 

  576.                   case 2:

  577.                     if(lp2 == 0) {

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

  579.                         cur_lp[j] = *ref_lp;

  580.                       lp2 += 2;

  581.                     }

  582.                     break;

  583. 

  584.                   case 3:

  585.                     if(lp2 < 2) {

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

  587.                         cur_lp[j] = *ref_lp;

  588.                       lp2 = 3;

  589.                     }

  590.                     break;

  591. 

  592.                   case 6:

  593.                     lp2 = 4;

  594.                     break;

  595. 

  596.                   case 7:

  597.                     if(rle_v3 != 0)

  598.                       rle_v3 = 0;

  599.                     else {

  600.                       buf1--;

  601.                       rle_v3 = 1;

  602.                     }

  603.                     lp2 = 4;

  604.                     break;

  605. 

  606.                   case 8:

  607.                     if(lp2 == 0) {

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

  609. 

  610.                       if(rle_v1 == 1) {

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

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

  613.                       }

  614. 

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

  616.                       break;

  617.                     } else {

  618.                       rle_v2 = (*buf1) - 1;

  619.                       rle_v1 = 1;

  620.                     }

  621.                   case 5:

  622.                       LP2_CHECK(buf1,rle_v3,lp2)

  623.                   case 4:

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

  625.                       cur_lp[j] = *ref_lp;

  626.                     lp2 = 4;

  627.                     break;

  628. 

  629.                   case 9:

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

  631.                     lv1 = *buf1++;

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

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

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

  635. 

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

  637.                       cur_lp[j] = lv;

  638. 

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

  640.                     break;

  641. 

  642.                   default:

  643.                     return;

  644.                 }

  645.               }

  646. 

  647.               cur_frm_pos += 4;

  648.             }

  649. 

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

  651.             flag1 = 0;

  652.           }

  653.           break;

  654. 

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

  656.           if(ref_vectors == NULL) {

  657.             flag1 = 1;

  658. 

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

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

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

  662.                   k = *buf1++;

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

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

  665.                   lv1 = ref_lp[0];

  666.                   lv2 = ref_lp[1];

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

  668. #ifdef WORDS_BIGENDIAN

  669.                     lv1 = lv1 & 0xFF00FF00;

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

  671.                     lv2 = lv2 & 0xFF00FF00;

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

  673. #else

  674.                     lv1 = lv1 & 0x00FF00FF;

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

  676.                     lv2 = lv2 & 0x00FF00FF;

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

  678. #endif

  679.                   }

  680. 

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

  682.                     case 0:

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

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

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

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

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

  688.                       } else {

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

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

  691.                       }

  692.                       lp2++;

  693.                       break;

  694. 

  695.                     case 1:

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

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

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

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

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

  701.                       } else {

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

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

  704.                       }

  705.                       buf1++;

  706.                       lp2++;

  707.                       break;

  708. 

  709.                     case 2:

  710.                       if(lp2 == 0) {

  711.                         if(flag1 != 0) {

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

  713.                             cur_lp[j] = lv1;

  714.                             cur_lp[j+1] = lv2;

  715.                           }

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

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

  718.                         } else {

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

  720.                             cur_lp[j] = lv1;

  721.                             cur_lp[j+1] = lv2;

  722.                           }

  723.                         }

  724.                         lp2 += 2;

  725.                       }

  726.                       break;

  727. 

  728.                     case 3:

  729.                       if(lp2 < 2) {

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

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

  732.                             cur_lp[j] = lv1;

  733.                             cur_lp[j+1] = lv2;

  734.                           }

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

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

  737.                         } else {

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

  739.                             cur_lp[j] = lv1;

  740.                             cur_lp[j+1] = lv2;

  741.                           }

  742.                         }

  743.                         lp2 = 3;

  744.                       }

  745.                       break;

  746. 

  747.                     case 8:

  748.                       if(lp2 == 0) {

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

  750.                         if(rle_v1 == 1) {

  751.                           if(flag1 != 0) {

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

  753.                               cur_lp[j] = lv1;

  754.                               cur_lp[j+1] = lv2;

  755.                             }

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

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

  758.                           } else {

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

  760.                               cur_lp[j] = lv1;

  761.                               cur_lp[j+1] = lv2;

  762.                             }

  763.                           }

  764.                         }

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

  766.                         break;

  767.                       } else {

  768.                         rle_v1 = 1;

  769.                         rle_v2 = (*buf1) - 1;

  770.                       }

  771.                     case 5:

  772.                         LP2_CHECK(buf1,rle_v3,lp2)

  773.                     case 4:

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

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

  776.                           cur_lp[j] = lv1;

  777.                           cur_lp[j+1] = lv2;

  778.                         }

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

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

  781.                       } else {

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

  783.                           cur_lp[j] = lv1;

  784.                           cur_lp[j+1] = lv2;

  785.                         }

  786.                       }

  787.                       lp2 = 4;

  788.                       break;

  789. 

  790.                     case 6:

  791.                       lp2 = 4;

  792.                       break;

  793. 

  794.                     case 7:

  795.                       if(lp2 == 0) {

  796.                         if(rle_v3 != 0)

  797.                           rle_v3 = 0;

  798.                         else {

  799.                           buf1--;

  800.                           rle_v3 = 1;

  801.                         }

  802.                         lp2 = 4;

  803.                       }

  804.                       break;

  805. 

  806.                     case 9:

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

  808.                       lv1 = *buf1;

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

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

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

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

  813.                         cur_lp[j] = lv;

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

  815.                       break;

  816. 

  817.                     default:

  818.                       return;

  819.                   }

  820.                 }

  821. 

  822.                 cur_frm_pos += 8;

  823.               }

  824. 

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

  826.               flag1 = 0;

  827.             }

  828.           } else {

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

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

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

  832.                   k = *buf1++;

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

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

  835. 

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

  837.                     case 0:

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

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

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

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

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

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

  844.                       lp2++;

  845.                       break;

  846. 

  847.                     case 1:

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

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

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

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

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

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

  854.                       lp2++;

  855.                       break;

  856. 

  857.                     case 2:

  858.                       if(lp2 == 0) {

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

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

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

  862.                         }

  863.                         lp2 += 2;

  864.                       }

  865.                       break;

  866. 

  867.                     case 3:

  868.                       if(lp2 < 2) {

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

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

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

  872.                         }

  873.                         lp2 = 3;

  874.                       }

  875.                       break;

  876. 

  877.                     case 8:

  878.                       if(lp2 == 0) {

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

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

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

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

  883.                         }

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

  885.                         break;

  886.                       } else {

  887.                         rle_v1 = 1;

  888.                         rle_v2 = (*buf1) - 1;

  889.                       }

  890.                     case 5:

  891.                     case 7:

  892.                         LP2_CHECK(buf1,rle_v3,lp2)

  893.                     case 6:

  894.                     case 4:

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

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

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

  898.                       }

  899.                       lp2 = 4;

  900.                       break;

  901. 

  902.                     case 9:

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

  904.                       lv1 = *buf1;

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

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

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

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

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

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

  911.                       break;

  912. 

  913.                     default:

  914.                       return;

  915.                   }

  916.                 }

  917. 

  918.                 cur_frm_pos += 8;

  919.                 ref_frm_pos += 8;

  920.               }

  921. 

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

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

  924.             }

  925.           }

  926.           break;

  927. 

  928.         case 11:                    /********** CASE 11 **********/

  929.           if(ref_vectors == NULL)

  930.             return;

  931. 

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

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

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

  935.                 k = *buf1++;

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

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

  938. 

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

  940.                   case 0:

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

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

  943.                     lp2++;

  944.                     break;

  945. 

  946.                   case 1:

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

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

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

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

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

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

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

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

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

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

  957.                     lp2++;

  958.                     break;

  959. 

  960.                   case 2:

  961.                     if(lp2 == 0) {

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

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

  964.                       lp2 += 2;

  965.                     }

  966.                     break;

  967. 

  968.                   case 3:

  969.                     if(lp2 < 2) {

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

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

  972.                       lp2 = 3;

  973.                     }

  974.                     break;

  975. 

  976.                   case 8:

  977.                     if(lp2 == 0) {

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

  979. 

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

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

  982. 

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

  984.                       break;

  985.                     } else {

  986.                       rle_v1 = 1;

  987.                       rle_v2 = (*buf1) - 1;

  988.                     }

  989.                   case 5:

  990.                   case 7:

  991.                       LP2_CHECK(buf1,rle_v3,lp2)

  992.                   case 4:

  993.                   case 6:

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

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

  996.                     lp2 = 4;

  997.                     break;

  998. 

  999.                 case 9:

  1000.                   av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  1001.                   lv1 = *buf1++;

  1002.                   lv = (lv1 & 0x7F) << 1;

  1003.                   lv += (lv << 8);

  1004.                   lv += (lv << 16);

  1005.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  1006.                     cur_lp[j] = lv;

  1007.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1008.                   break;

  1009. 

  1010.                   default:

  1011.                     return;

  1012.                 }

  1013.               }

  1014. 

  1015.               cur_frm_pos += 4;

  1016.               ref_frm_pos += 4;

  1017.             }

  1018. 

  1019.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1020.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1021.           }

  1022.           break;

  1023. 

  1024.         default:

  1025.           return;

  1026.       }

  1027.     }

  1028. 

  1029.     if(strip < strip_tbl)

  1030.       return;

  1031. 

  1032.     for( ; strip >= strip_tbl; strip--) {

  1033.       if(strip->split_flag != 0) {

  1034.         strip->split_flag = 0;

  1035.         strip->usl7 = (strip-1)->usl7;

  1036. 

  1037.         if(strip->split_direction) {

  1038.           strip->xpos += strip->width;

  1039.           strip->width = (strip-1)->width - strip->width;

  1040.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1041.             strip->width = width - strip->xpos;

  1042.         } else {

  1043.           strip->ypos += strip->height;

  1044.           strip->height = (strip-1)->height - strip->height;

  1045.         }

  1046.         break;

  1047.       }

  1048.     }

  1049.   }

  1050. }

  1051. 

  1052. static int indeo3_decode_init(AVCodecContext *avctx)

  1053. {

  1054.     Indeo3DecodeContext *s = avctx->priv_data;

  1055. 

  1056.     s->avctx = avctx;

  1057.     s->width = avctx->width;

  1058.     s->height = avctx->height;

  1059.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1060. 

  1061.     build_modpred(s);

  1062.     iv_alloc_frames(s);

  1063. 

  1064.     return 0;

  1065. }

  1066. 

  1067. static int indeo3_decode_frame(AVCodecContext *avctx,

  1068.                                void *data, int *data_size,

  1069.                                const unsigned char *buf, int buf_size)

  1070. {

  1071.     Indeo3DecodeContext *s=avctx->priv_data;

  1072.     unsigned char *src, *dest;

  1073.     int y;

  1074. 

  1075.     iv_decode_frame(s, buf, buf_size);

  1076. 

  1077.     if(s->frame.data[0])

  1078.         avctx->release_buffer(avctx, &s->frame);

  1079. 

  1080.     s->frame.reference = 0;

  1081.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1082.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1083.         return -1;

  1084.     }

  1085. 

  1086.     src = s->cur_frame->Ybuf;

  1087.     dest = s->frame.data[0];

  1088.     for (y = 0; y < s->height; y++) {

  1089.       memcpy(dest, src, s->cur_frame->y_w);

  1090.       src += s->cur_frame->y_w;

  1091.       dest += s->frame.linesize[0];

  1092.     }

  1093. 

  1094.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1095.     {

  1096.     src = s->cur_frame->Ubuf;

  1097.     dest = s->frame.data[1];

  1098.     for (y = 0; y < s->height / 4; y++) {

  1099.       memcpy(dest, src, s->cur_frame->uv_w);

  1100.       src += s->cur_frame->uv_w;

  1101.       dest += s->frame.linesize[1];

  1102.     }

  1103. 

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

  1105.     dest = s->frame.data[2];

  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[2];

  1110.     }

  1111.     }

  1112. 

  1113.     *data_size=sizeof(AVFrame);

  1114.     *(AVFrame*)data= s->frame;

  1115. 

  1116.     return buf_size;

  1117. }

  1118. 

  1119. static int indeo3_decode_end(AVCodecContext *avctx)

  1120. {

  1121.     Indeo3DecodeContext *s = avctx->priv_data;

  1122. 

  1123.     iv_free_func(s);

  1124. 

  1125.     return 0;

  1126. }

  1127. 

  1128. AVCodec indeo3_decoder = {

  1129.     "indeo3",

  1130.     CODEC_TYPE_VIDEO,

  1131.     CODEC_ID_INDEO3,

  1132.     sizeof(Indeo3DecodeContext),

  1133.     indeo3_decode_init,

  1134.     NULL,

  1135.     indeo3_decode_end,

  1136.     indeo3_decode_frame,

  1137.     0,

  1138.     NULL

  1139. };