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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 "bytestream.h"

  30. 

  31. #include "indeo3data.h"

  32. 

  33. typedef struct

  34. {

  35.   uint8_t *Ybuf;

  36.   uint8_t *Ubuf;

  37.   uint8_t *Vbuf;

  38.   uint8_t *the_buf;

  39.   unsigned int the_buf_size;

  40.   unsigned short y_w, y_h;

  41.   unsigned short uv_w, uv_h;

  42. } YUVBufs;

  43. 

  44. typedef struct Indeo3DecodeContext {

  45.     AVCodecContext *avctx;

  46.     int width, height;

  47.     AVFrame frame;

  48. 

  49.     YUVBufs iv_frame[2];

  50.     YUVBufs *cur_frame;

  51.     YUVBufs *ref_frame;

  52. 

  53.     uint8_t *ModPred;

  54.     uint8_t *corrector_type;

  55. } Indeo3DecodeContext;

  56. 

  57. static const uint8_t corrector_type_0[24] = {

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

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

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

  61. };

  62. 

  63. static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };

  64. 

  65. static av_cold void build_modpred(Indeo3DecodeContext *s)

  66. {

  67.   int i, j;

  68. 

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

  70. 

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

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

  73.     s->ModPred[i+1*128] = i ==   7 ?  20 :

  74.                           i == 119 ||

  75.                           i == 120 ? 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 = av_malloc(24 * 256);

  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]          ? 1 :

  89.                                    j < 248 || (i == 16 && j == 248) ? 0 :

  90.                                    corrector_type_2[j - 248];

  91.     }

  92.   }

  93. }

  94. 

  95. static void iv_Decode_Chunk(Indeo3DecodeContext *s, uint8_t *cur,

  96.   uint8_t *ref, int width, int height, const uint8_t *buf1,

  97.   long fflags2, const uint8_t *hdr,

  98.   const uint8_t *buf2, int min_width_160);

  99. 

  100. /* ---------------------------------------------------------------------- */

  101. static av_cold 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 = av_malloc(bufsize)))

  125.     return;

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

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

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

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

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

  131. 

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

  133.   i = luma_pixels + luma_width * 2;

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

  135.   i += (luma_pixels + luma_width);

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

  137.   i += (chroma_pixels + chroma_width);

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

  139.   i += (chroma_pixels + chroma_width);

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

  141.   i += (chroma_pixels + chroma_width);

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

  143. 

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

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

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

  147. 

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

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

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

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

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

  153.   }

  154. }

  155. 

  156. /* ---------------------------------------------------------------------- */

  157. static av_cold void iv_free_func(Indeo3DecodeContext *s)

  158. {

  159.   int i;

  160. 

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

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

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

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

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

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

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

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

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

  170.   }

  171. 

  172.   av_free(s->ModPred);

  173.   av_free(s->corrector_type);

  174. }

  175. 

  176. /* ---------------------------------------------------------------------- */

  177. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  178.                                      const uint8_t *buf, int buf_size)

  179. {

  180.   unsigned int hdr_width, hdr_height,

  181.     chroma_width, chroma_height;

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

  183.   const uint8_t *hdr_pos, *buf_pos;

  184. 

  185.   buf_pos = buf;

  186.   buf_pos += 18;

  187. 

  188.   fflags1 = bytestream_get_le16(&buf_pos);

  189.   fflags3 = bytestream_get_le32(&buf_pos);

  190.   fflags2 = *buf_pos++;

  191.   buf_pos += 3;

  192.   hdr_height = bytestream_get_le16(&buf_pos);

  193.   hdr_width  = bytestream_get_le16(&buf_pos);

  194. 

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

  196.       return -1;

  197. 

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

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

  200.   offs1 = bytestream_get_le32(&buf_pos);

  201.   offs2 = bytestream_get_le32(&buf_pos);

  202.   offs3 = bytestream_get_le32(&buf_pos);

  203.   buf_pos += 4;

  204.   hdr_pos = buf_pos;

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

  206. 

  207.   if(fflags1 & 0x200) {

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

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

  210.   } else {

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

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

  213.   }

  214. 

  215.   buf_pos = buf + 16 + offs1;

  216.   offs = bytestream_get_le32(&buf_pos);

  217. 

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

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

  220.     FFMIN(hdr_width, 160));

  221. 

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

  223.   {

  224. 

  225.   buf_pos = buf + 16 + offs2;

  226.   offs = bytestream_get_le32(&buf_pos);

  227. 

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

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

  230.     FFMIN(chroma_width, 40));

  231. 

  232.   buf_pos = buf + 16 + offs3;

  233.   offs = bytestream_get_le32(&buf_pos);

  234. 

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

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

  237.     FFMIN(chroma_width, 40));

  238. 

  239.   }

  240. 

  241.   return 8;

  242. }

  243. 

  244. typedef struct {

  245.   long xpos;

  246.   long ypos;

  247.   long width;

  248.   long height;

  249.   long split_flag;

  250.   long split_direction;

  251.   long usl7;

  252. } ustr_t;

  253. 

  254. /* ---------------------------------------------------------------------- */

  255. 

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

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

  258.     if(rle_v3 != 0)         \

  259.       rle_v3 = 0;           \

  260.     else {                  \

  261.       rle_v3 = 1;           \

  262.       buf1 -= 2;            \

  263.     }                       \

  264.   }                         \

  265.   lp2 = 4;

  266. 

  267. 

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

  269.   if(rle_v3 == 0) {         \

  270.     rle_v2 = *buf1;         \

  271.     rle_v1 = 1;             \

  272.     if(rle_v2 > 32) {       \

  273.       rle_v2 -= 32;         \

  274.       rle_v1 = 0;           \

  275.     }                       \

  276.     rle_v3 = 1;             \

  277.   }                         \

  278.   buf1--;

  279. 

  280. 

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

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

  283.     rle_v3 = 0;           \

  284.   else {                  \

  285.     buf1--;               \

  286.     rle_v3 = 1;           \

  287.   }

  288. 

  289. 

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

  291.   rle_v2--;             \

  292.   if(rle_v2 == 0) {     \

  293.     rle_v3 = 0;         \

  294.     buf1 += 2;          \

  295.   }                     \

  296.   lp2 = 4;

  297. 

  298. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

  299.   uint8_t *cur, uint8_t *ref, int width, int height,

  300.   const uint8_t *buf1, long fflags2, const uint8_t *hdr,

  301.   const uint8_t *buf2, int min_width_160)

  302. {

  303.   uint8_t bit_buf;

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

  305.   long *width_tbl, width_tbl_arr[10];

  306.   const signed char *ref_vectors;

  307.   uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;

  308.   uint32_t *cur_lp, *ref_lp;

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

  310.   uint8_t *correction_type_sp[2];

  311.   ustr_t strip_tbl[20], *strip;

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

  313.     rle_v1, rle_v2, rle_v3;

  314.   unsigned short res;

  315. 

  316.   bit_buf = 0;

  317.   ref_vectors = NULL;

  318. 

  319.   width_tbl = width_tbl_arr + 1;

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

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

  322.     width_tbl[j] = i * j;

  323. 

  324.   strip = strip_tbl;

  325. 

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

  327. 

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

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

  330.   strip->height = height;

  331.   strip->split_direction = 0;

  332.   strip->split_flag = 0;

  333.   strip->usl7 = 0;

  334. 

  335.   bit_pos = 0;

  336. 

  337.   rle_v1 = rle_v2 = rle_v3 = 0;

  338. 

  339.   while(strip >= strip_tbl) {

  340.     if(bit_pos <= 0) {

  341.       bit_pos = 8;

  342.       bit_buf = *buf1++;

  343.     }

  344. 

  345.     bit_pos -= 2;

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

  347. 

  348.     if(cmd == 0) {

  349.       strip++;

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

  351.       strip->split_flag = 1;

  352.       strip->split_direction = 0;

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

  354.       continue;

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

  356.       strip++;

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

  358.       strip->split_flag = 1;

  359.       strip->split_direction = 1;

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

  361.       continue;

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

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

  364.         strip->usl7 = 1;

  365.         ref_vectors = NULL;

  366.         continue;

  367.       }

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

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

  370.         strip->usl7 = 1;

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

  372.         buf1++;

  373.         continue;

  374.       }

  375.     }

  376. 

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

  378. 

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

  380.       blks_width += 3;

  381.     blks_width >>= 2;

  382.     blks_height = strip->height;

  383. 

  384.     if(ref_vectors != NULL) {

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

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

  387.     } else

  388.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  389. 

  390.     if(cmd == 2) {

  391.       if(bit_pos <= 0) {

  392.         bit_pos = 8;

  393.         bit_buf = *buf1++;

  394.       }

  395. 

  396.       bit_pos -= 2;

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

  398. 

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

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

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

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

  403.           cur_frm_pos += 4;

  404.           ref_frm_pos += 4;

  405.         }

  406.       } else if(cmd != 1)

  407.         return;

  408.     } else {

  409.       k = *buf1 >> 4;

  410.       j = *buf1 & 0x0f;

  411.       buf1++;

  412.       lv = j + fflags2;

  413. 

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

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

  416.         cp = ref_frm_pos;

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

  418.             int v = *cp >> 1;

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

  420.         }

  421.       }

  422. 

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

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

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

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

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

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

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

  430.       } else {

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

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

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

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

  435.       }

  436. 

  437.       switch(k) {

  438.         case 1:

  439.         case 0:                    /********** CASE 0 **********/

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

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

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

  443.                 k = *buf1++;

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

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

  446. 

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

  448.                   case 0:

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

  450.                     lp2++;

  451.                     break;

  452.                   case 1:

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

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

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

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

  457.                     buf1++;

  458.                     lp2++;

  459.                     break;

  460.                   case 2:

  461.                     if(lp2 == 0) {

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

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

  464.                       lp2 += 2;

  465.                     }

  466.                     break;

  467.                   case 3:

  468.                     if(lp2 < 2) {

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

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

  471.                       lp2 = 3;

  472.                     }

  473.                     break;

  474.                   case 8:

  475.                     if(lp2 == 0) {

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

  477. 

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

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

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

  481.                       }

  482. 

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

  484.                       break;

  485.                     } else {

  486.                       rle_v1 = 1;

  487.                       rle_v2 = *buf1 - 1;

  488.                     }

  489.                   case 5:

  490.                       LP2_CHECK(buf1,rle_v3,lp2)

  491.                   case 4:

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

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

  494.                     lp2 = 4;

  495.                     break;

  496. 

  497.                   case 7:

  498.                     if(rle_v3 != 0)

  499.                       rle_v3 = 0;

  500.                     else {

  501.                       buf1--;

  502.                       rle_v3 = 1;

  503.                     }

  504.                   case 6:

  505.                     if(ref_vectors != NULL) {

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

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

  508.                     }

  509.                     lp2 = 4;

  510.                     break;

  511. 

  512.                   case 9:

  513.                     lv1 = *buf1++;

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

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

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

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

  518.                       cur_lp[j] = lv;

  519. 

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

  521.                     break;

  522.                   default:

  523.                     return;

  524.                 }

  525.               }

  526. 

  527.               cur_frm_pos += 4;

  528.               ref_frm_pos += 4;

  529.             }

  530. 

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

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

  533.           }

  534.           break;

  535. 

  536.         case 4:

  537.         case 3:                    /********** CASE 3 **********/

  538.           if(ref_vectors != NULL)

  539.             return;

  540.           flag1 = 1;

  541. 

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

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

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

  545.                 k = *buf1++;

  546. 

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

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

  549. 

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

  551.                   case 0:

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

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

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

  555.                     else

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

  557.                     lp2++;

  558.                     break;

  559. 

  560.                   case 1:

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

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

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

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

  565. 

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

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

  568.                     else

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

  570.                     buf1++;

  571.                     lp2++;

  572.                     break;

  573. 

  574.                   case 2:

  575.                     if(lp2 == 0) {

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

  577.                         cur_lp[j] = *ref_lp;

  578.                       lp2 += 2;

  579.                     }

  580.                     break;

  581. 

  582.                   case 3:

  583.                     if(lp2 < 2) {

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

  585.                         cur_lp[j] = *ref_lp;

  586.                       lp2 = 3;

  587.                     }

  588.                     break;

  589. 

  590.                   case 6:

  591.                     lp2 = 4;

  592.                     break;

  593. 

  594.                   case 7:

  595.                     if(rle_v3 != 0)

  596.                       rle_v3 = 0;

  597.                     else {

  598.                       buf1--;

  599.                       rle_v3 = 1;

  600.                     }

  601.                     lp2 = 4;

  602.                     break;

  603. 

  604.                   case 8:

  605.                     if(lp2 == 0) {

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

  607. 

  608.                       if(rle_v1 == 1) {

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

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

  611.                       }

  612. 

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

  614.                       break;

  615.                     } else {

  616.                       rle_v2 = (*buf1) - 1;

  617.                       rle_v1 = 1;

  618.                     }

  619.                   case 5:

  620.                       LP2_CHECK(buf1,rle_v3,lp2)

  621.                   case 4:

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

  623.                       cur_lp[j] = *ref_lp;

  624.                     lp2 = 4;

  625.                     break;

  626. 

  627.                   case 9:

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

  629.                     lv1 = *buf1++;

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

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

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

  633. 

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

  635.                       cur_lp[j] = lv;

  636. 

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

  638.                     break;

  639. 

  640.                   default:

  641.                     return;

  642.                 }

  643.               }

  644. 

  645.               cur_frm_pos += 4;

  646.             }

  647. 

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

  649.             flag1 = 0;

  650.           }

  651.           break;

  652. 

  653.         case 10:                    /********** CASE 10 **********/

  654.           if(ref_vectors == NULL) {

  655.             flag1 = 1;

  656. 

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

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

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

  660.                   k = *buf1++;

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

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

  663.                   lv1 = ref_lp[0];

  664.                   lv2 = ref_lp[1];

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

  666. #ifdef WORDS_BIGENDIAN

  667.                     lv1 = lv1 & 0xFF00FF00;

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

  669.                     lv2 = lv2 & 0xFF00FF00;

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

  671. #else

  672.                     lv1 = lv1 & 0x00FF00FF;

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

  674.                     lv2 = lv2 & 0x00FF00FF;

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

  676. #endif

  677.                   }

  678. 

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

  680.                     case 0:

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

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

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

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

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

  686.                       } else {

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

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

  689.                       }

  690.                       lp2++;

  691.                       break;

  692. 

  693.                     case 1:

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

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

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

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

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

  699.                       } else {

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

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

  702.                       }

  703.                       buf1++;

  704.                       lp2++;

  705.                       break;

  706. 

  707.                     case 2:

  708.                       if(lp2 == 0) {

  709.                         if(flag1 != 0) {

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

  711.                             cur_lp[j] = lv1;

  712.                             cur_lp[j+1] = lv2;

  713.                           }

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

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

  716.                         } else {

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

  718.                             cur_lp[j] = lv1;

  719.                             cur_lp[j+1] = lv2;

  720.                           }

  721.                         }

  722.                         lp2 += 2;

  723.                       }

  724.                       break;

  725. 

  726.                     case 3:

  727.                       if(lp2 < 2) {

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

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

  730.                             cur_lp[j] = lv1;

  731.                             cur_lp[j+1] = lv2;

  732.                           }

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

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

  735.                         } else {

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

  737.                             cur_lp[j] = lv1;

  738.                             cur_lp[j+1] = lv2;

  739.                           }

  740.                         }

  741.                         lp2 = 3;

  742.                       }

  743.                       break;

  744. 

  745.                     case 8:

  746.                       if(lp2 == 0) {

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

  748.                         if(rle_v1 == 1) {

  749.                           if(flag1 != 0) {

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

  751.                               cur_lp[j] = lv1;

  752.                               cur_lp[j+1] = lv2;

  753.                             }

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

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

  756.                           } else {

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

  758.                               cur_lp[j] = lv1;

  759.                               cur_lp[j+1] = lv2;

  760.                             }

  761.                           }

  762.                         }

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

  764.                         break;

  765.                       } else {

  766.                         rle_v1 = 1;

  767.                         rle_v2 = (*buf1) - 1;

  768.                       }

  769.                     case 5:

  770.                         LP2_CHECK(buf1,rle_v3,lp2)

  771.                     case 4:

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

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

  774.                           cur_lp[j] = lv1;

  775.                           cur_lp[j+1] = lv2;

  776.                         }

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

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

  779.                       } else {

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

  781.                           cur_lp[j] = lv1;

  782.                           cur_lp[j+1] = lv2;

  783.                         }

  784.                       }

  785.                       lp2 = 4;

  786.                       break;

  787. 

  788.                     case 6:

  789.                       lp2 = 4;

  790.                       break;

  791. 

  792.                     case 7:

  793.                       if(lp2 == 0) {

  794.                         if(rle_v3 != 0)

  795.                           rle_v3 = 0;

  796.                         else {

  797.                           buf1--;

  798.                           rle_v3 = 1;

  799.                         }

  800.                         lp2 = 4;

  801.                       }

  802.                       break;

  803. 

  804.                     case 9:

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

  806.                       lv1 = *buf1;

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

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

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

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

  811.                         cur_lp[j] = lv;

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

  813.                       break;

  814. 

  815.                     default:

  816.                       return;

  817.                   }

  818.                 }

  819. 

  820.                 cur_frm_pos += 8;

  821.               }

  822. 

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

  824.               flag1 = 0;

  825.             }

  826.           } else {

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

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

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

  830.                   k = *buf1++;

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

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

  833. 

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

  835.                     case 0:

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

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

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

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

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

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

  842.                       lp2++;

  843.                       break;

  844. 

  845.                     case 1:

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

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

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

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

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

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

  852.                       lp2++;

  853.                       break;

  854. 

  855.                     case 2:

  856.                       if(lp2 == 0) {

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

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

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

  860.                         }

  861.                         lp2 += 2;

  862.                       }

  863.                       break;

  864. 

  865.                     case 3:

  866.                       if(lp2 < 2) {

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

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

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

  870.                         }

  871.                         lp2 = 3;

  872.                       }

  873.                       break;

  874. 

  875.                     case 8:

  876.                       if(lp2 == 0) {

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

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

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

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

  881.                         }

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

  883.                         break;

  884.                       } else {

  885.                         rle_v1 = 1;

  886.                         rle_v2 = (*buf1) - 1;

  887.                       }

  888.                     case 5:

  889.                     case 7:

  890.                         LP2_CHECK(buf1,rle_v3,lp2)

  891.                     case 6:

  892.                     case 4:

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

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

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

  896.                       }

  897.                       lp2 = 4;

  898.                       break;

  899. 

  900.                     case 9:

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

  902.                       lv1 = *buf1;

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

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

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

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

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

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

  909.                       break;

  910. 

  911.                     default:

  912.                       return;

  913.                   }

  914.                 }

  915. 

  916.                 cur_frm_pos += 8;

  917.                 ref_frm_pos += 8;

  918.               }

  919. 

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

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

  922.             }

  923.           }

  924.           break;

  925. 

  926.         case 11:                    /********** CASE 11 **********/

  927.           if(ref_vectors == NULL)

  928.             return;

  929. 

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

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

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

  933.                 k = *buf1++;

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

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

  936. 

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

  938.                   case 0:

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

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

  941.                     lp2++;

  942.                     break;

  943. 

  944.                   case 1:

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

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

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

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

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

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

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

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

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

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

  955.                     lp2++;

  956.                     break;

  957. 

  958.                   case 2:

  959.                     if(lp2 == 0) {

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

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

  962.                       lp2 += 2;

  963.                     }

  964.                     break;

  965. 

  966.                   case 3:

  967.                     if(lp2 < 2) {

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

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

  970.                       lp2 = 3;

  971.                     }

  972.                     break;

  973. 

  974.                   case 8:

  975.                     if(lp2 == 0) {

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

  977. 

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

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

  980. 

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

  982.                       break;

  983.                     } else {

  984.                       rle_v1 = 1;

  985.                       rle_v2 = (*buf1) - 1;

  986.                     }

  987.                   case 5:

  988.                   case 7:

  989.                       LP2_CHECK(buf1,rle_v3,lp2)

  990.                   case 4:

  991.                   case 6:

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

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

  994.                     lp2 = 4;

  995.                     break;

  996. 

  997.                 case 9:

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

  999.                   lv1 = *buf1++;

  1000.                   lv = (lv1 & 0x7F) << 1;

  1001.                   lv += (lv << 8);

  1002.                   lv += (lv << 16);

  1003.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  1004.                     cur_lp[j] = lv;

  1005.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1006.                   break;

  1007. 

  1008.                   default:

  1009.                     return;

  1010.                 }

  1011.               }

  1012. 

  1013.               cur_frm_pos += 4;

  1014.               ref_frm_pos += 4;

  1015.             }

  1016. 

  1017.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1018.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1019.           }

  1020.           break;

  1021. 

  1022.         default:

  1023.           return;

  1024.       }

  1025.     }

  1026. 

  1027.     if(strip < strip_tbl)

  1028.       return;

  1029. 

  1030.     for( ; strip >= strip_tbl; strip--) {

  1031.       if(strip->split_flag != 0) {

  1032.         strip->split_flag = 0;

  1033.         strip->usl7 = (strip-1)->usl7;

  1034. 

  1035.         if(strip->split_direction) {

  1036.           strip->xpos += strip->width;

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

  1038.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1039.             strip->width = width - strip->xpos;

  1040.         } else {

  1041.           strip->ypos += strip->height;

  1042.           strip->height = (strip-1)->height - strip->height;

  1043.         }

  1044.         break;

  1045.       }

  1046.     }

  1047.   }

  1048. }

  1049. 

  1050. static av_cold int indeo3_decode_init(AVCodecContext *avctx)

  1051. {

  1052.     Indeo3DecodeContext *s = avctx->priv_data;

  1053. 

  1054.     s->avctx = avctx;

  1055.     s->width = avctx->width;

  1056.     s->height = avctx->height;

  1057.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1058. 

  1059.     build_modpred(s);

  1060.     iv_alloc_frames(s);

  1061. 

  1062.     return 0;

  1063. }

  1064. 

  1065. static int indeo3_decode_frame(AVCodecContext *avctx,

  1066.                                void *data, int *data_size,

  1067.                                const uint8_t *buf, int buf_size)

  1068. {

  1069.     Indeo3DecodeContext *s=avctx->priv_data;

  1070.     uint8_t *src, *dest;

  1071.     int y;

  1072. 

  1073.     iv_decode_frame(s, buf, buf_size);

  1074. 

  1075.     if(s->frame.data[0])

  1076.         avctx->release_buffer(avctx, &s->frame);

  1077. 

  1078.     s->frame.reference = 0;

  1079.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1080.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1081.         return -1;

  1082.     }

  1083. 

  1084.     src = s->cur_frame->Ybuf;

  1085.     dest = s->frame.data[0];

  1086.     for (y = 0; y < s->height; y++) {

  1087.       memcpy(dest, src, s->cur_frame->y_w);

  1088.       src += s->cur_frame->y_w;

  1089.       dest += s->frame.linesize[0];

  1090.     }

  1091. 

  1092.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1093.     {

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

  1095.     dest = s->frame.data[1];

  1096.     for (y = 0; y < s->height / 4; y++) {

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

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

  1099.       dest += s->frame.linesize[1];

  1100.     }

  1101. 

  1102.     src = s->cur_frame->Vbuf;

  1103.     dest = s->frame.data[2];

  1104.     for (y = 0; y < s->height / 4; y++) {

  1105.       memcpy(dest, src, s->cur_frame->uv_w);

  1106.       src += s->cur_frame->uv_w;

  1107.       dest += s->frame.linesize[2];

  1108.     }

  1109.     }

  1110. 

  1111.     *data_size=sizeof(AVFrame);

  1112.     *(AVFrame*)data= s->frame;

  1113. 

  1114.     return buf_size;

  1115. }

  1116. 

  1117. static av_cold int indeo3_decode_end(AVCodecContext *avctx)

  1118. {

  1119.     Indeo3DecodeContext *s = avctx->priv_data;

  1120. 

  1121.     iv_free_func(s);

  1122. 

  1123.     return 0;

  1124. }

  1125. 

  1126. AVCodec indeo3_decoder = {

  1127.     "indeo3",

  1128.     CODEC_TYPE_VIDEO,

  1129.     CODEC_ID_INDEO3,

  1130.     sizeof(Indeo3DecodeContext),

  1131.     indeo3_decode_init,

  1132.     NULL,

  1133.     indeo3_decode_end,

  1134.     indeo3_decode_frame,

  1135.     0,

  1136.     NULL,

  1137.     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),

  1138. };