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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 "common.h"

  28. #include "avcodec.h"

  29. #include "dsputil.h"

  30. #include "mpegvideo.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 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 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, unsigned char *buf1,

  97.   long fflags2, unsigned char *hdr,

  98.   unsigned char *buf2, int min_width_160);

  99. 

  100. #ifndef min

  101. #define min(a,b) ((a) < (b) ? (a) : (b))

  102. #endif

  103. 

  104. /* ---------------------------------------------------------------------- */

  105. static void iv_alloc_frames(Indeo3DecodeContext *s)

  106. {

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

  108.       chroma_pixels, i;

  109.   unsigned int bufsize;

  110. 

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

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

  113. 

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

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

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

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

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

  119. 

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

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

  122.   luma_pixels = luma_width * luma_height;

  123.   chroma_pixels = chroma_width * chroma_height;

  124. 

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

  126.     (chroma_pixels + chroma_width) * 4;

  127. 

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

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

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

  131.     return;

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

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

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

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

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

  137. 

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

  139.   i = luma_pixels + luma_width * 2;

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

  141.   i += (luma_pixels + luma_width);

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

  143.   i += (chroma_pixels + chroma_width);

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

  145.   i += (chroma_pixels + chroma_width);

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

  147.   i += (chroma_pixels + chroma_width);

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

  149. 

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

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

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

  153. 

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

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

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

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

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

  159.   }

  160. }

  161. 

  162. /* ---------------------------------------------------------------------- */

  163. static void iv_free_func(Indeo3DecodeContext *s)

  164. {

  165.   int i;

  166. 

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

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

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

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

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

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

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

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

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

  176.   }

  177. 

  178.   av_free(s->ModPred);

  179.   av_free(s->corrector_type);

  180. }

  181. 

  182. /* ---------------------------------------------------------------------- */

  183. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  184.                                      unsigned char *buf, int buf_size)

  185. {

  186.   unsigned int hdr_width, hdr_height,

  187.     chroma_width, chroma_height;

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

  189.   unsigned char *hdr_pos, *buf_pos;

  190. 

  191.   buf_pos = buf;

  192.   buf_pos += 18;

  193. 

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

  195.   buf_pos += 2;

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

  197.   buf_pos += 4;

  198.   fflags2 = *buf_pos++;

  199.   buf_pos += 3;

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

  201.   buf_pos += 2;

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

  203. 

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

  205.       return -1;

  206. 

  207.   buf_pos += 2;

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

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

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

  211.   buf_pos += 4;

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

  213.   buf_pos += 4;

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

  215.   buf_pos += 8;

  216.   hdr_pos = buf_pos;

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

  218. 

  219.   if(fflags1 & 0x200) {

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

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

  222.   } else {

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

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

  225.   }

  226. 

  227.   buf_pos = buf + 16 + offs1;

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

  229.   buf_pos += 4;

  230. 

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

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

  233.     min(hdr_width, 160));

  234. 

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

  236.   {

  237. 

  238.   buf_pos = buf + 16 + offs2;

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

  240.   buf_pos += 4;

  241. 

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

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

  244.     min(chroma_width, 40));

  245. 

  246.   buf_pos = buf + 16 + offs3;

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

  248.   buf_pos += 4;

  249. 

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

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

  252.     min(chroma_width, 40));

  253. 

  254.   }

  255. 

  256.   return 8;

  257. }

  258. 

  259. typedef struct {

  260.   long xpos;

  261.   long ypos;

  262.   long width;

  263.   long height;

  264.   long split_flag;

  265.   long split_direction;

  266.   long usl7;

  267. } ustr_t;

  268. 

  269. /* ---------------------------------------------------------------------- */

  270. 

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

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

  273.     if(rle_v3 != 0)         \

  274.       rle_v3 = 0;           \

  275.     else {                  \

  276.       rle_v3 = 1;           \

  277.       buf1 -= 2;            \

  278.     }                       \

  279.   }                         \

  280.   lp2 = 4;

  281. 

  282. 

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

  284.   if(rle_v3 == 0) {         \

  285.     rle_v2 = *buf1;         \

  286.     rle_v1 = 1;             \

  287.     if(rle_v2 > 32) {       \

  288.       rle_v2 -= 32;         \

  289.       rle_v1 = 0;           \

  290.     }                       \

  291.     rle_v3 = 1;             \

  292.   }                         \

  293.   buf1--;

  294. 

  295. 

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

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

  298.     rle_v3 = 0;           \

  299.   else {                  \

  300.     buf1--;               \

  301.     rle_v3 = 1;           \

  302.   }

  303. 

  304. 

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

  306.   rle_v2--;             \

  307.   if(rle_v2 == 0) {     \

  308.     rle_v3 = 0;         \

  309.     buf1 += 2;          \

  310.   }                     \

  311.   lp2 = 4;

  312. 

  313. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  316.   unsigned char *buf2, int min_width_160)

  317. {

  318.   unsigned char bit_buf;

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

  320.   long *width_tbl, width_tbl_arr[10];

  321.   signed char *ref_vectors;

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

  323.   uint32_t *cur_lp, *ref_lp;

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

  325.   unsigned short *correction_type_sp[2];

  326.   ustr_t strip_tbl[20], *strip;

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

  328.     rle_v1, rle_v2, rle_v3;

  329.   unsigned short res;

  330. 

  331.   bit_buf = 0;

  332.   ref_vectors = NULL;

  333. 

  334.   width_tbl = width_tbl_arr + 1;

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

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

  337.     width_tbl[j] = i * j;

  338. 

  339.   strip = strip_tbl;

  340. 

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

  342. 

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

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

  345.   strip->height = height;

  346.   strip->split_direction = 0;

  347.   strip->split_flag = 0;

  348.   strip->usl7 = 0;

  349. 

  350.   bit_pos = 0;

  351. 

  352.   rle_v1 = rle_v2 = rle_v3 = 0;

  353. 

  354.   while(strip >= strip_tbl) {

  355.     if(bit_pos <= 0) {

  356.       bit_pos = 8;

  357.       bit_buf = *buf1++;

  358.     }

  359. 

  360.     bit_pos -= 2;

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

  362. 

  363.     if(cmd == 0) {

  364.       strip++;

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

  366.       strip->split_flag = 1;

  367.       strip->split_direction = 0;

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

  369.       continue;

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

  371.       strip++;

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

  373.       strip->split_flag = 1;

  374.       strip->split_direction = 1;

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

  376.       continue;

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

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

  379.         strip->usl7 = 1;

  380.         ref_vectors = NULL;

  381.         continue;

  382.       }

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

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

  385.         strip->usl7 = 1;

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

  387.         buf1++;

  388.         continue;

  389.       }

  390.     }

  391. 

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

  393. 

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

  395.       blks_width += 3;

  396.     blks_width >>= 2;

  397.     blks_height = strip->height;

  398. 

  399.     if(ref_vectors != NULL) {

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

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

  402.     } else

  403.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  404. 

  405.     if(cmd == 2) {

  406.       if(bit_pos <= 0) {

  407.         bit_pos = 8;

  408.         bit_buf = *buf1++;

  409.       }

  410. 

  411.       bit_pos -= 2;

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

  413. 

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

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

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

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

  418.           cur_frm_pos += 4;

  419.           ref_frm_pos += 4;

  420.         }

  421.       } else if(cmd != 1)

  422.         return;

  423.     } else {

  424.       k = *buf1 >> 4;

  425.       j = *buf1 & 0x0f;

  426.       buf1++;

  427.       lv = j + fflags2;

  428. 

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

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

  431.         cp = ref_frm_pos;

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

  433.             int v = *cp >> 1;

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

  435.         }

  436.       }

  437. 

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

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

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

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

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

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

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

  445.       } else {

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

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

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

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

  450.       }

  451. 

  452.       switch(k) {

  453.         case 1:

  454.         case 0:                    /********** CASE 0 **********/

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

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

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

  458.                 k = *buf1++;

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

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

  461. 

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

  463.                   case 0:

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

  465.                     lp2++;

  466.                     break;

  467.                   case 1:

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

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

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

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

  472.                     buf1++;

  473.                     lp2++;

  474.                     break;

  475.                   case 2:

  476.                     if(lp2 == 0) {

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

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

  479.                       lp2 += 2;

  480.                     }

  481.                     break;

  482.                   case 3:

  483.                     if(lp2 < 2) {

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

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

  486.                       lp2 = 3;

  487.                     }

  488.                     break;

  489.                   case 8:

  490.                     if(lp2 == 0) {

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

  492. 

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

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

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

  496.                       }

  497. 

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

  499.                       break;

  500.                     } else {

  501.                       rle_v1 = 1;

  502.                       rle_v2 = *buf1 - 1;

  503.                     }

  504.                   case 5:

  505.                       LP2_CHECK(buf1,rle_v3,lp2)

  506.                   case 4:

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

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

  509.                     lp2 = 4;

  510.                     break;

  511. 

  512.                   case 7:

  513.                     if(rle_v3 != 0)

  514.                       rle_v3 = 0;

  515.                     else {

  516.                       buf1--;

  517.                       rle_v3 = 1;

  518.                     }

  519.                   case 6:

  520.                     if(ref_vectors != NULL) {

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

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

  523.                     }

  524.                     lp2 = 4;

  525.                     break;

  526. 

  527.                   case 9:

  528.                     lv1 = *buf1++;

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

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

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

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

  533.                       cur_lp[j] = lv;

  534. 

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

  536.                     break;

  537.                   default:

  538.                     return;

  539.                 }

  540.               }

  541. 

  542.               cur_frm_pos += 4;

  543.               ref_frm_pos += 4;

  544.             }

  545. 

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

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

  548.           }

  549.           break;

  550. 

  551.         case 4:

  552.         case 3:                    /********** CASE 3 **********/

  553.           if(ref_vectors != NULL)

  554.             return;

  555.           flag1 = 1;

  556. 

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

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

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

  560.                 k = *buf1++;

  561. 

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

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

  564. 

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

  566.                   case 0:

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

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

  572.                     lp2++;

  573.                     break;

  574. 

  575.                   case 1:

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

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

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

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

  580. 

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

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

  583.                     else

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

  585.                     buf1++;

  586.                     lp2++;

  587.                     break;

  588. 

  589.                   case 2:

  590.                     if(lp2 == 0) {

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

  592.                         cur_lp[j] = *ref_lp;

  593.                       lp2 += 2;

  594.                     }

  595.                     break;

  596. 

  597.                   case 3:

  598.                     if(lp2 < 2) {

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

  600.                         cur_lp[j] = *ref_lp;

  601.                       lp2 = 3;

  602.                     }

  603.                     break;

  604. 

  605.                   case 6:

  606.                     lp2 = 4;

  607.                     break;

  608. 

  609.                   case 7:

  610.                     if(rle_v3 != 0)

  611.                       rle_v3 = 0;

  612.                     else {

  613.                       buf1--;

  614.                       rle_v3 = 1;

  615.                     }

  616.                     lp2 = 4;

  617.                     break;

  618. 

  619.                   case 8:

  620.                     if(lp2 == 0) {

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

  622. 

  623.                       if(rle_v1 == 1) {

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

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

  626.                       }

  627. 

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

  629.                       break;

  630.                     } else {

  631.                       rle_v2 = (*buf1) - 1;

  632.                       rle_v1 = 1;

  633.                     }

  634.                   case 5:

  635.                       LP2_CHECK(buf1,rle_v3,lp2)

  636.                   case 4:

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

  638.                       cur_lp[j] = *ref_lp;

  639.                     lp2 = 4;

  640.                     break;

  641. 

  642.                   case 9:

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

  644.                     lv1 = *buf1++;

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

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

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

  648. 

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

  650.                       cur_lp[j] = lv;

  651. 

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

  653.                     break;

  654. 

  655.                   default:

  656.                     return;

  657.                 }

  658.               }

  659. 

  660.               cur_frm_pos += 4;

  661.             }

  662. 

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

  664.             flag1 = 0;

  665.           }

  666.           break;

  667. 

  668.         case 10:                    /********** CASE 10 **********/

  669.           if(ref_vectors == NULL) {

  670.             flag1 = 1;

  671. 

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

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

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

  675.                   k = *buf1++;

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

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

  678.                   lv1 = ref_lp[0];

  679.                   lv2 = ref_lp[1];

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

  681. #ifdef WORDS_BIGENDIAN

  682.                     lv1 = lv1 & 0xFF00FF00;

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

  684.                     lv2 = lv2 & 0xFF00FF00;

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

  686. #else

  687.                     lv1 = lv1 & 0x00FF00FF;

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

  689.                     lv2 = lv2 & 0x00FF00FF;

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

  691. #endif

  692.                   }

  693. 

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

  695.                     case 0:

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

  697.                       cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_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.                       lp2++;

  706.                       break;

  707. 

  708.                     case 1:

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

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

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

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

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

  714.                       } else {

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

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

  717.                       }

  718.                       buf1++;

  719.                       lp2++;

  720.                       break;

  721. 

  722.                     case 2:

  723.                       if(lp2 == 0) {

  724.                         if(flag1 != 0) {

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

  726.                             cur_lp[j] = lv1;

  727.                             cur_lp[j+1] = lv2;

  728.                           }

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

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

  731.                         } else {

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

  733.                             cur_lp[j] = lv1;

  734.                             cur_lp[j+1] = lv2;

  735.                           }

  736.                         }

  737.                         lp2 += 2;

  738.                       }

  739.                       break;

  740. 

  741.                     case 3:

  742.                       if(lp2 < 2) {

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

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

  745.                             cur_lp[j] = lv1;

  746.                             cur_lp[j+1] = lv2;

  747.                           }

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

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

  750.                         } else {

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

  752.                             cur_lp[j] = lv1;

  753.                             cur_lp[j+1] = lv2;

  754.                           }

  755.                         }

  756.                         lp2 = 3;

  757.                       }

  758.                       break;

  759. 

  760.                     case 8:

  761.                       if(lp2 == 0) {

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

  763.                         if(rle_v1 == 1) {

  764.                           if(flag1 != 0) {

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

  766.                               cur_lp[j] = lv1;

  767.                               cur_lp[j+1] = lv2;

  768.                             }

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

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

  771.                           } else {

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

  773.                               cur_lp[j] = lv1;

  774.                               cur_lp[j+1] = lv2;

  775.                             }

  776.                           }

  777.                         }

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

  779.                         break;

  780.                       } else {

  781.                         rle_v1 = 1;

  782.                         rle_v2 = (*buf1) - 1;

  783.                       }

  784.                     case 5:

  785.                         LP2_CHECK(buf1,rle_v3,lp2)

  786.                     case 4:

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

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

  789.                           cur_lp[j] = lv1;

  790.                           cur_lp[j+1] = lv2;

  791.                         }

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

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

  794.                       } else {

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

  796.                           cur_lp[j] = lv1;

  797.                           cur_lp[j+1] = lv2;

  798.                         }

  799.                       }

  800.                       lp2 = 4;

  801.                       break;

  802. 

  803.                     case 6:

  804.                       lp2 = 4;

  805.                       break;

  806. 

  807.                     case 7:

  808.                       if(lp2 == 0) {

  809.                         if(rle_v3 != 0)

  810.                           rle_v3 = 0;

  811.                         else {

  812.                           buf1--;

  813.                           rle_v3 = 1;

  814.                         }

  815.                         lp2 = 4;

  816.                       }

  817.                       break;

  818. 

  819.                     case 9:

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

  821.                       lv1 = *buf1;

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

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

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

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

  826.                         cur_lp[j] = lv;

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

  828.                       break;

  829. 

  830.                     default:

  831.                       return;

  832.                   }

  833.                 }

  834. 

  835.                 cur_frm_pos += 8;

  836.               }

  837. 

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

  839.               flag1 = 0;

  840.             }

  841.           } else {

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

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

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

  845.                   k = *buf1++;

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

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

  848. 

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

  850.                     case 0:

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

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

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

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

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

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

  857.                       lp2++;

  858.                       break;

  859. 

  860.                     case 1:

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

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

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

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

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

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

  867.                       lp2++;

  868.                       break;

  869. 

  870.                     case 2:

  871.                       if(lp2 == 0) {

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

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

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

  875.                         }

  876.                         lp2 += 2;

  877.                       }

  878.                       break;

  879. 

  880.                     case 3:

  881.                       if(lp2 < 2) {

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

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

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

  885.                         }

  886.                         lp2 = 3;

  887.                       }

  888.                       break;

  889. 

  890.                     case 8:

  891.                       if(lp2 == 0) {

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

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

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

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

  896.                         }

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

  898.                         break;

  899.                       } else {

  900.                         rle_v1 = 1;

  901.                         rle_v2 = (*buf1) - 1;

  902.                       }

  903.                     case 5:

  904.                     case 7:

  905.                         LP2_CHECK(buf1,rle_v3,lp2)

  906.                     case 6:

  907.                     case 4:

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

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

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

  911.                       }

  912.                       lp2 = 4;

  913.                       break;

  914. 

  915.                     case 9:

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

  917.                       lv1 = *buf1;

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

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

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

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

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

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

  924.                       break;

  925. 

  926.                     default:

  927.                       return;

  928.                   }

  929.                 }

  930. 

  931.                 cur_frm_pos += 8;

  932.                 ref_frm_pos += 8;

  933.               }

  934. 

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

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

  937.             }

  938.           }

  939.           break;

  940. 

  941.         case 11:                    /********** CASE 11 **********/

  942.           if(ref_vectors == NULL)

  943.             return;

  944. 

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

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

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

  948.                 k = *buf1++;

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

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

  951. 

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

  953.                   case 0:

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

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

  956.                     lp2++;

  957.                     break;

  958. 

  959.                   case 1:

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

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

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

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

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

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

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

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

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

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

  970.                     lp2++;

  971.                     break;

  972. 

  973.                   case 2:

  974.                     if(lp2 == 0) {

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

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

  977.                       lp2 += 2;

  978.                     }

  979.                     break;

  980. 

  981.                   case 3:

  982.                     if(lp2 < 2) {

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

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

  985.                       lp2 = 3;

  986.                     }

  987.                     break;

  988. 

  989.                   case 8:

  990.                     if(lp2 == 0) {

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

  992. 

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

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

  995. 

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

  997.                       break;

  998.                     } else {

  999.                       rle_v1 = 1;

  1000.                       rle_v2 = (*buf1) - 1;

  1001.                     }

  1002.                   case 5:

  1003.                   case 7:

  1004.                       LP2_CHECK(buf1,rle_v3,lp2)

  1005.                   case 4:

  1006.                   case 6:

  1007.                     for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])

  1008.                       cur_lp[j] = ref_lp[j];

  1009.                     lp2 = 4;

  1010.                     break;

  1011. 

  1012.                 case 9:

  1013.                   av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");

  1014.                   lv1 = *buf1++;

  1015.                   lv = (lv1 & 0x7F) << 1;

  1016.                   lv += (lv << 8);

  1017.                   lv += (lv << 16);

  1018.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  1019.                     cur_lp[j] = lv;

  1020.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1021.                   break;

  1022. 

  1023.                   default:

  1024.                     return;

  1025.                 }

  1026.               }

  1027. 

  1028.               cur_frm_pos += 4;

  1029.               ref_frm_pos += 4;

  1030.             }

  1031. 

  1032.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1033.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1034.           }

  1035.           break;

  1036. 

  1037.         default:

  1038.           return;

  1039.       }

  1040.     }

  1041. 

  1042.     if(strip < strip_tbl)

  1043.       return;

  1044. 

  1045.     for( ; strip >= strip_tbl; strip--) {

  1046.       if(strip->split_flag != 0) {

  1047.         strip->split_flag = 0;

  1048.         strip->usl7 = (strip-1)->usl7;

  1049. 

  1050.         if(strip->split_direction) {

  1051.           strip->xpos += strip->width;

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

  1053.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1054.             strip->width = width - strip->xpos;

  1055.         } else {

  1056.           strip->ypos += strip->height;

  1057.           strip->height = (strip-1)->height - strip->height;

  1058.         }

  1059.         break;

  1060.       }

  1061.     }

  1062.   }

  1063. }

  1064. 

  1065. static int indeo3_decode_init(AVCodecContext *avctx)

  1066. {

  1067.     Indeo3DecodeContext *s = avctx->priv_data;

  1068. 

  1069.     s->avctx = avctx;

  1070.     s->width = avctx->width;

  1071.     s->height = avctx->height;

  1072.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1073.     avctx->has_b_frames = 0;

  1074. 

  1075.     build_modpred(s);

  1076.     iv_alloc_frames(s);

  1077. 

  1078.     return 0;

  1079. }

  1080. 

  1081. static int indeo3_decode_frame(AVCodecContext *avctx,

  1082.                                void *data, int *data_size,

  1083.                                unsigned char *buf, int buf_size)

  1084. {

  1085.     Indeo3DecodeContext *s=avctx->priv_data;

  1086.     unsigned char *src, *dest;

  1087.     int y;

  1088. 

  1089.     iv_decode_frame(s, buf, buf_size);

  1090. 

  1091.     if(s->frame.data[0])

  1092.         avctx->release_buffer(avctx, &s->frame);

  1093. 

  1094.     s->frame.reference = 0;

  1095.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1096.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1097.         return -1;

  1098.     }

  1099. 

  1100.     src = s->cur_frame->Ybuf;

  1101.     dest = s->frame.data[0];

  1102.     for (y = 0; y < s->height; y++) {

  1103.       memcpy(dest, src, s->cur_frame->y_w);

  1104.       src += s->cur_frame->y_w;

  1105.       dest += s->frame.linesize[0];

  1106.     }

  1107. 

  1108.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1109.     {

  1110.     src = s->cur_frame->Ubuf;

  1111.     dest = s->frame.data[1];

  1112.     for (y = 0; y < s->height / 4; y++) {

  1113.       memcpy(dest, src, s->cur_frame->uv_w);

  1114.       src += s->cur_frame->uv_w;

  1115.       dest += s->frame.linesize[1];

  1116.     }

  1117. 

  1118.     src = s->cur_frame->Vbuf;

  1119.     dest = s->frame.data[2];

  1120.     for (y = 0; y < s->height / 4; y++) {

  1121.       memcpy(dest, src, s->cur_frame->uv_w);

  1122.       src += s->cur_frame->uv_w;

  1123.       dest += s->frame.linesize[2];

  1124.     }

  1125.     }

  1126. 

  1127.     *data_size=sizeof(AVFrame);

  1128.     *(AVFrame*)data= s->frame;

  1129. 

  1130.     return buf_size;

  1131. }

  1132. 

  1133. static int indeo3_decode_end(AVCodecContext *avctx)

  1134. {

  1135.     Indeo3DecodeContext *s = avctx->priv_data;

  1136. 

  1137.     iv_free_func(s);

  1138. 

  1139.     return 0;

  1140. }

  1141. 

  1142. AVCodec indeo3_decoder = {

  1143.     "indeo3",

  1144.     CODEC_TYPE_VIDEO,

  1145.     CODEC_ID_INDEO3,

  1146.     sizeof(Indeo3DecodeContext),

  1147.     indeo3_decode_init,

  1148.     NULL,

  1149.     indeo3_decode_end,

  1150.     indeo3_decode_frame,

  1151.     0,

  1152.     NULL

  1153. };