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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.   unsigned char *Ybuf;

  36.   unsigned char *Ubuf;

  37.   unsigned char *Vbuf;

  38.   unsigned char *the_buf;

  39.   unsigned int the_buf_size;

  40.   unsigned short y_w, y_h;

  41.   unsigned short uv_w, uv_h;

  42. } YUVBufs;

  43. 

  44. typedef struct Indeo3DecodeContext {

  45.     AVCodecContext *avctx;

  46.     int width, height;

  47.     AVFrame frame;

  48. 

  49.     YUVBufs iv_frame[2];

  50.     YUVBufs *cur_frame;

  51.     YUVBufs *ref_frame;

  52. 

  53.     unsigned char *ModPred;

  54.     unsigned short *corrector_type;

  55. } Indeo3DecodeContext;

  56. 

  57. static const int corrector_type_0[24] = {

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

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

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

  61. };

  62. 

  63. static const int 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 = (unsigned char *) av_malloc (8 * 128);

  70. 

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

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

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

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

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

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

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

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

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

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

  81.   }

  82. 

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

  84. 

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

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

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

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

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

  90.     }

  91.   }

  92. }

  93. 

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

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

  96.   long fflags2, const unsigned char *hdr,

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

  98. 

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

  100. static av_cold void iv_alloc_frames(Indeo3DecodeContext *s)

  101. {

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

  103.       chroma_pixels, i;

  104.   unsigned int bufsize;

  105. 

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

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

  108. 

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

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

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

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

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

  114. 

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

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

  117.   luma_pixels = luma_width * luma_height;

  118.   chroma_pixels = chroma_width * chroma_height;

  119. 

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

  121.     (chroma_pixels + chroma_width) * 4;

  122. 

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

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

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

  126.     return;

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

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

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

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

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

  132. 

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

  134.   i = luma_pixels + luma_width * 2;

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

  136.   i += (luma_pixels + luma_width);

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

  138.   i += (chroma_pixels + chroma_width);

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

  140.   i += (chroma_pixels + chroma_width);

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

  142.   i += (chroma_pixels + chroma_width);

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

  144. 

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

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

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

  148. 

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

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

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

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

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

  154.   }

  155. }

  156. 

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

  158. static av_cold void iv_free_func(Indeo3DecodeContext *s)

  159. {

  160.   int i;

  161. 

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

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

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

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

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

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

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

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

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

  171.   }

  172. 

  173.   av_free(s->ModPred);

  174.   av_free(s->corrector_type);

  175. }

  176. 

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

  178. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  179.                                      const unsigned char *buf, int buf_size)

  180. {

  181.   unsigned int hdr_width, hdr_height,

  182.     chroma_width, chroma_height;

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

  184.   const unsigned char *hdr_pos, *buf_pos;

  185. 

  186.   buf_pos = buf;

  187.   buf_pos += 18;

  188. 

  189.   fflags1 = bytestream_get_le16(&buf_pos);

  190.   fflags3 = bytestream_get_le32(&buf_pos);

  191.   fflags2 = *buf_pos++;

  192.   buf_pos += 3;

  193.   hdr_height = bytestream_get_le16(&buf_pos);

  194.   hdr_width  = bytestream_get_le16(&buf_pos);

  195. 

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

  197.       return -1;

  198. 

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

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

  201.   offs1 = bytestream_get_le32(&buf_pos);

  202.   offs2 = bytestream_get_le32(&buf_pos);

  203.   offs3 = bytestream_get_le32(&buf_pos);

  204.   buf_pos += 4;

  205.   hdr_pos = buf_pos;

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

  207. 

  208.   if(fflags1 & 0x200) {

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

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

  211.   } else {

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

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

  214.   }

  215. 

  216.   buf_pos = buf + 16 + offs1;

  217.   offs = bytestream_get_le32(&buf_pos);

  218. 

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

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

  221.     FFMIN(hdr_width, 160));

  222. 

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

  224.   {

  225. 

  226.   buf_pos = buf + 16 + offs2;

  227.   offs = bytestream_get_le32(&buf_pos);

  228. 

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

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

  231.     FFMIN(chroma_width, 40));

  232. 

  233.   buf_pos = buf + 16 + offs3;

  234.   offs = bytestream_get_le32(&buf_pos);

  235. 

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

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

  238.     FFMIN(chroma_width, 40));

  239. 

  240.   }

  241. 

  242.   return 8;

  243. }

  244. 

  245. typedef struct {

  246.   long xpos;

  247.   long ypos;

  248.   long width;

  249.   long height;

  250.   long split_flag;

  251.   long split_direction;

  252.   long usl7;

  253. } ustr_t;

  254. 

  255. /* ---------------------------------------------------------------------- */

  256. 

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

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

  259.     if(rle_v3 != 0)         \

  260.       rle_v3 = 0;           \

  261.     else {                  \

  262.       rle_v3 = 1;           \

  263.       buf1 -= 2;            \

  264.     }                       \

  265.   }                         \

  266.   lp2 = 4;

  267. 

  268. 

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

  270.   if(rle_v3 == 0) {         \

  271.     rle_v2 = *buf1;         \

  272.     rle_v1 = 1;             \

  273.     if(rle_v2 > 32) {       \

  274.       rle_v2 -= 32;         \

  275.       rle_v1 = 0;           \

  276.     }                       \

  277.     rle_v3 = 1;             \

  278.   }                         \

  279.   buf1--;

  280. 

  281. 

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

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

  284.     rle_v3 = 0;           \

  285.   else {                  \

  286.     buf1--;               \

  287.     rle_v3 = 1;           \

  288.   }

  289. 

  290. 

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

  292.   rle_v2--;             \

  293.   if(rle_v2 == 0) {     \

  294.     rle_v3 = 0;         \

  295.     buf1 += 2;          \

  296.   }                     \

  297.   lp2 = 4;

  298. 

  299. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  302.   const unsigned char *buf2, int min_width_160)

  303. {

  304.   unsigned char bit_buf;

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

  306.   long *width_tbl, width_tbl_arr[10];

  307.   const signed char *ref_vectors;

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

  309.   uint32_t *cur_lp, *ref_lp;

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

  311.   unsigned short *correction_type_sp[2];

  312.   ustr_t strip_tbl[20], *strip;

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

  314.     rle_v1, rle_v2, rle_v3;

  315.   unsigned short res;

  316. 

  317.   bit_buf = 0;

  318.   ref_vectors = NULL;

  319. 

  320.   width_tbl = width_tbl_arr + 1;

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

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

  323.     width_tbl[j] = i * j;

  324. 

  325.   strip = strip_tbl;

  326. 

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

  328. 

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

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

  331.   strip->height = height;

  332.   strip->split_direction = 0;

  333.   strip->split_flag = 0;

  334.   strip->usl7 = 0;

  335. 

  336.   bit_pos = 0;

  337. 

  338.   rle_v1 = rle_v2 = rle_v3 = 0;

  339. 

  340.   while(strip >= strip_tbl) {

  341.     if(bit_pos <= 0) {

  342.       bit_pos = 8;

  343.       bit_buf = *buf1++;

  344.     }

  345. 

  346.     bit_pos -= 2;

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

  348. 

  349.     if(cmd == 0) {

  350.       strip++;

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

  352.       strip->split_flag = 1;

  353.       strip->split_direction = 0;

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

  355.       continue;

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

  357.       strip++;

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

  359.       strip->split_flag = 1;

  360.       strip->split_direction = 1;

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

  362.       continue;

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

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

  365.         strip->usl7 = 1;

  366.         ref_vectors = NULL;

  367.         continue;

  368.       }

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

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

  371.         strip->usl7 = 1;

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

  373.         buf1++;

  374.         continue;

  375.       }

  376.     }

  377. 

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

  379. 

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

  381.       blks_width += 3;

  382.     blks_width >>= 2;

  383.     blks_height = strip->height;

  384. 

  385.     if(ref_vectors != NULL) {

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

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

  388.     } else

  389.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  390. 

  391.     if(cmd == 2) {

  392.       if(bit_pos <= 0) {

  393.         bit_pos = 8;

  394.         bit_buf = *buf1++;

  395.       }

  396. 

  397.       bit_pos -= 2;

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

  399. 

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

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

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

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

  404.           cur_frm_pos += 4;

  405.           ref_frm_pos += 4;

  406.         }

  407.       } else if(cmd != 1)

  408.         return;

  409.     } else {

  410.       k = *buf1 >> 4;

  411.       j = *buf1 & 0x0f;

  412.       buf1++;

  413.       lv = j + fflags2;

  414. 

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

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

  417.         cp = ref_frm_pos;

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

  419.             int v = *cp >> 1;

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

  421.         }

  422.       }

  423. 

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

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

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

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

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

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

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

  431.       } else {

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

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

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

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

  436.       }

  437. 

  438.       switch(k) {

  439.         case 1:

  440.         case 0:                    /********** CASE 0 **********/

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

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

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

  444.                 k = *buf1++;

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

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

  447. 

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

  449.                   case 0:

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

  451.                     lp2++;

  452.                     break;

  453.                   case 1:

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

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

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

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

  458.                     buf1++;

  459.                     lp2++;

  460.                     break;

  461.                   case 2:

  462.                     if(lp2 == 0) {

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

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

  465.                       lp2 += 2;

  466.                     }

  467.                     break;

  468.                   case 3:

  469.                     if(lp2 < 2) {

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

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

  472.                       lp2 = 3;

  473.                     }

  474.                     break;

  475.                   case 8:

  476.                     if(lp2 == 0) {

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

  478. 

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

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

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

  482.                       }

  483. 

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

  485.                       break;

  486.                     } else {

  487.                       rle_v1 = 1;

  488.                       rle_v2 = *buf1 - 1;

  489.                     }

  490.                   case 5:

  491.                       LP2_CHECK(buf1,rle_v3,lp2)

  492.                   case 4:

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

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

  495.                     lp2 = 4;

  496.                     break;

  497. 

  498.                   case 7:

  499.                     if(rle_v3 != 0)

  500.                       rle_v3 = 0;

  501.                     else {

  502.                       buf1--;

  503.                       rle_v3 = 1;

  504.                     }

  505.                   case 6:

  506.                     if(ref_vectors != NULL) {

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

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

  509.                     }

  510.                     lp2 = 4;

  511.                     break;

  512. 

  513.                   case 9:

  514.                     lv1 = *buf1++;

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

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

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

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

  519.                       cur_lp[j] = lv;

  520. 

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

  522.                     break;

  523.                   default:

  524.                     return;

  525.                 }

  526.               }

  527. 

  528.               cur_frm_pos += 4;

  529.               ref_frm_pos += 4;

  530.             }

  531. 

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

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

  534.           }

  535.           break;

  536. 

  537.         case 4:

  538.         case 3:                    /********** CASE 3 **********/

  539.           if(ref_vectors != NULL)

  540.             return;

  541.           flag1 = 1;

  542. 

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

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

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

  546.                 k = *buf1++;

  547. 

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

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

  550. 

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

  552.                   case 0:

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

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

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

  556.                     else

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

  558.                     lp2++;

  559.                     break;

  560. 

  561.                   case 1:

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

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

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

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

  566. 

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

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

  569.                     else

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

  571.                     buf1++;

  572.                     lp2++;

  573.                     break;

  574. 

  575.                   case 2:

  576.                     if(lp2 == 0) {

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

  578.                         cur_lp[j] = *ref_lp;

  579.                       lp2 += 2;

  580.                     }

  581.                     break;

  582. 

  583.                   case 3:

  584.                     if(lp2 < 2) {

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

  586.                         cur_lp[j] = *ref_lp;

  587.                       lp2 = 3;

  588.                     }

  589.                     break;

  590. 

  591.                   case 6:

  592.                     lp2 = 4;

  593.                     break;

  594. 

  595.                   case 7:

  596.                     if(rle_v3 != 0)

  597.                       rle_v3 = 0;

  598.                     else {

  599.                       buf1--;

  600.                       rle_v3 = 1;

  601.                     }

  602.                     lp2 = 4;

  603.                     break;

  604. 

  605.                   case 8:

  606.                     if(lp2 == 0) {

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

  608. 

  609.                       if(rle_v1 == 1) {

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

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

  612.                       }

  613. 

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

  615.                       break;

  616.                     } else {

  617.                       rle_v2 = (*buf1) - 1;

  618.                       rle_v1 = 1;

  619.                     }

  620.                   case 5:

  621.                       LP2_CHECK(buf1,rle_v3,lp2)

  622.                   case 4:

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

  624.                       cur_lp[j] = *ref_lp;

  625.                     lp2 = 4;

  626.                     break;

  627. 

  628.                   case 9:

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

  630.                     lv1 = *buf1++;

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

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

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

  634. 

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

  636.                       cur_lp[j] = lv;

  637. 

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

  639.                     break;

  640. 

  641.                   default:

  642.                     return;

  643.                 }

  644.               }

  645. 

  646.               cur_frm_pos += 4;

  647.             }

  648. 

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

  650.             flag1 = 0;

  651.           }

  652.           break;

  653. 

  654.         case 10:                    /********** CASE 10 **********/

  655.           if(ref_vectors == NULL) {

  656.             flag1 = 1;

  657. 

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

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

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

  661.                   k = *buf1++;

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

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

  664.                   lv1 = ref_lp[0];

  665.                   lv2 = ref_lp[1];

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

  667. #ifdef WORDS_BIGENDIAN

  668.                     lv1 = lv1 & 0xFF00FF00;

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

  670.                     lv2 = lv2 & 0xFF00FF00;

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

  672. #else

  673.                     lv1 = lv1 & 0x00FF00FF;

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

  675.                     lv2 = lv2 & 0x00FF00FF;

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

  677. #endif

  678.                   }

  679. 

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

  681.                     case 0:

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

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

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

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

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

  687.                       } else {

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

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

  690.                       }

  691.                       lp2++;

  692.                       break;

  693. 

  694.                     case 1:

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

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

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

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

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

  700.                       } else {

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

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

  703.                       }

  704.                       buf1++;

  705.                       lp2++;

  706.                       break;

  707. 

  708.                     case 2:

  709.                       if(lp2 == 0) {

  710.                         if(flag1 != 0) {

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

  712.                             cur_lp[j] = lv1;

  713.                             cur_lp[j+1] = lv2;

  714.                           }

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

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

  717.                         } else {

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

  719.                             cur_lp[j] = lv1;

  720.                             cur_lp[j+1] = lv2;

  721.                           }

  722.                         }

  723.                         lp2 += 2;

  724.                       }

  725.                       break;

  726. 

  727.                     case 3:

  728.                       if(lp2 < 2) {

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

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

  731.                             cur_lp[j] = lv1;

  732.                             cur_lp[j+1] = lv2;

  733.                           }

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

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

  736.                         } else {

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

  738.                             cur_lp[j] = lv1;

  739.                             cur_lp[j+1] = lv2;

  740.                           }

  741.                         }

  742.                         lp2 = 3;

  743.                       }

  744.                       break;

  745. 

  746.                     case 8:

  747.                       if(lp2 == 0) {

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

  749.                         if(rle_v1 == 1) {

  750.                           if(flag1 != 0) {

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

  752.                               cur_lp[j] = lv1;

  753.                               cur_lp[j+1] = lv2;

  754.                             }

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

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

  757.                           } else {

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

  759.                               cur_lp[j] = lv1;

  760.                               cur_lp[j+1] = lv2;

  761.                             }

  762.                           }

  763.                         }

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

  765.                         break;

  766.                       } else {

  767.                         rle_v1 = 1;

  768.                         rle_v2 = (*buf1) - 1;

  769.                       }

  770.                     case 5:

  771.                         LP2_CHECK(buf1,rle_v3,lp2)

  772.                     case 4:

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

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

  775.                           cur_lp[j] = lv1;

  776.                           cur_lp[j+1] = lv2;

  777.                         }

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

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

  780.                       } else {

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

  782.                           cur_lp[j] = lv1;

  783.                           cur_lp[j+1] = lv2;

  784.                         }

  785.                       }

  786.                       lp2 = 4;

  787.                       break;

  788. 

  789.                     case 6:

  790.                       lp2 = 4;

  791.                       break;

  792. 

  793.                     case 7:

  794.                       if(lp2 == 0) {

  795.                         if(rle_v3 != 0)

  796.                           rle_v3 = 0;

  797.                         else {

  798.                           buf1--;

  799.                           rle_v3 = 1;

  800.                         }

  801.                         lp2 = 4;

  802.                       }

  803.                       break;

  804. 

  805.                     case 9:

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

  807.                       lv1 = *buf1;

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

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

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

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

  812.                         cur_lp[j] = lv;

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

  814.                       break;

  815. 

  816.                     default:

  817.                       return;

  818.                   }

  819.                 }

  820. 

  821.                 cur_frm_pos += 8;

  822.               }

  823. 

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

  825.               flag1 = 0;

  826.             }

  827.           } else {

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

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

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

  831.                   k = *buf1++;

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

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

  834. 

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

  836.                     case 0:

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

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

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

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

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

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

  843.                       lp2++;

  844.                       break;

  845. 

  846.                     case 1:

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

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

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

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

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

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

  853.                       lp2++;

  854.                       break;

  855. 

  856.                     case 2:

  857.                       if(lp2 == 0) {

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

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

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

  861.                         }

  862.                         lp2 += 2;

  863.                       }

  864.                       break;

  865. 

  866.                     case 3:

  867.                       if(lp2 < 2) {

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

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

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

  871.                         }

  872.                         lp2 = 3;

  873.                       }

  874.                       break;

  875. 

  876.                     case 8:

  877.                       if(lp2 == 0) {

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

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

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

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

  882.                         }

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

  884.                         break;

  885.                       } else {

  886.                         rle_v1 = 1;

  887.                         rle_v2 = (*buf1) - 1;

  888.                       }

  889.                     case 5:

  890.                     case 7:

  891.                         LP2_CHECK(buf1,rle_v3,lp2)

  892.                     case 6:

  893.                     case 4:

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

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

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

  897.                       }

  898.                       lp2 = 4;

  899.                       break;

  900. 

  901.                     case 9:

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

  903.                       lv1 = *buf1;

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

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

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

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

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

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

  910.                       break;

  911. 

  912.                     default:

  913.                       return;

  914.                   }

  915.                 }

  916. 

  917.                 cur_frm_pos += 8;

  918.                 ref_frm_pos += 8;

  919.               }

  920. 

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

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

  923.             }

  924.           }

  925.           break;

  926. 

  927.         case 11:                    /********** CASE 11 **********/

  928.           if(ref_vectors == NULL)

  929.             return;

  930. 

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

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

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

  934.                 k = *buf1++;

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

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

  937. 

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

  939.                   case 0:

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

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

  942.                     lp2++;

  943.                     break;

  944. 

  945.                   case 1:

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

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

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

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

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

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

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

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

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

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

  956.                     lp2++;

  957.                     break;

  958. 

  959.                   case 2:

  960.                     if(lp2 == 0) {

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

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

  963.                       lp2 += 2;

  964.                     }

  965.                     break;

  966. 

  967.                   case 3:

  968.                     if(lp2 < 2) {

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

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

  971.                       lp2 = 3;

  972.                     }

  973.                     break;

  974. 

  975.                   case 8:

  976.                     if(lp2 == 0) {

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

  978. 

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

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

  981. 

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

  983.                       break;

  984.                     } else {

  985.                       rle_v1 = 1;

  986.                       rle_v2 = (*buf1) - 1;

  987.                     }

  988.                   case 5:

  989.                   case 7:

  990.                       LP2_CHECK(buf1,rle_v3,lp2)

  991.                   case 4:

  992.                   case 6:

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

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

  995.                     lp2 = 4;

  996.                     break;

  997. 

  998.                 case 9:

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

  1000.                   lv1 = *buf1++;

  1001.                   lv = (lv1 & 0x7F) << 1;

  1002.                   lv += (lv << 8);

  1003.                   lv += (lv << 16);

  1004.                   for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])

  1005.                     cur_lp[j] = lv;

  1006.                   LV1_CHECK(buf1,rle_v3,lv1,lp2)

  1007.                   break;

  1008. 

  1009.                   default:

  1010.                     return;

  1011.                 }

  1012.               }

  1013. 

  1014.               cur_frm_pos += 4;

  1015.               ref_frm_pos += 4;

  1016.             }

  1017. 

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

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

  1020.           }

  1021.           break;

  1022. 

  1023.         default:

  1024.           return;

  1025.       }

  1026.     }

  1027. 

  1028.     if(strip < strip_tbl)

  1029.       return;

  1030. 

  1031.     for( ; strip >= strip_tbl; strip--) {

  1032.       if(strip->split_flag != 0) {

  1033.         strip->split_flag = 0;

  1034.         strip->usl7 = (strip-1)->usl7;

  1035. 

  1036.         if(strip->split_direction) {

  1037.           strip->xpos += strip->width;

  1038.           strip->width = (strip-1)->width - strip->width;

  1039.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1040.             strip->width = width - strip->xpos;

  1041.         } else {

  1042.           strip->ypos += strip->height;

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

  1044.         }

  1045.         break;

  1046.       }

  1047.     }

  1048.   }

  1049. }

  1050. 

  1051. static av_cold int indeo3_decode_init(AVCodecContext *avctx)

  1052. {

  1053.     Indeo3DecodeContext *s = avctx->priv_data;

  1054. 

  1055.     s->avctx = avctx;

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

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

  1058.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1059. 

  1060.     build_modpred(s);

  1061.     iv_alloc_frames(s);

  1062. 

  1063.     return 0;

  1064. }

  1065. 

  1066. static int indeo3_decode_frame(AVCodecContext *avctx,

  1067.                                void *data, int *data_size,

  1068.                                const unsigned char *buf, int buf_size)

  1069. {

  1070.     Indeo3DecodeContext *s=avctx->priv_data;

  1071.     unsigned char *src, *dest;

  1072.     int y;

  1073. 

  1074.     iv_decode_frame(s, buf, buf_size);

  1075. 

  1076.     if(s->frame.data[0])

  1077.         avctx->release_buffer(avctx, &s->frame);

  1078. 

  1079.     s->frame.reference = 0;

  1080.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1081.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1082.         return -1;

  1083.     }

  1084. 

  1085.     src = s->cur_frame->Ybuf;

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

  1087.     for (y = 0; y < s->height; y++) {

  1088.       memcpy(dest, src, s->cur_frame->y_w);

  1089.       src += s->cur_frame->y_w;

  1090.       dest += s->frame.linesize[0];

  1091.     }

  1092. 

  1093.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1094.     {

  1095.     src = s->cur_frame->Ubuf;

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

  1097.     for (y = 0; y < s->height / 4; y++) {

  1098.       memcpy(dest, src, s->cur_frame->uv_w);

  1099.       src += s->cur_frame->uv_w;

  1100.       dest += s->frame.linesize[1];

  1101.     }

  1102. 

  1103.     src = s->cur_frame->Vbuf;

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

  1105.     for (y = 0; y < s->height / 4; y++) {

  1106.       memcpy(dest, src, s->cur_frame->uv_w);

  1107.       src += s->cur_frame->uv_w;

  1108.       dest += s->frame.linesize[2];

  1109.     }

  1110.     }

  1111. 

  1112.     *data_size=sizeof(AVFrame);

  1113.     *(AVFrame*)data= s->frame;

  1114. 

  1115.     return buf_size;

  1116. }

  1117. 

  1118. static av_cold int indeo3_decode_end(AVCodecContext *avctx)

  1119. {

  1120.     Indeo3DecodeContext *s = avctx->priv_data;

  1121. 

  1122.     iv_free_func(s);

  1123. 

  1124.     return 0;

  1125. }

  1126. 

  1127. AVCodec indeo3_decoder = {

  1128.     "indeo3",

  1129.     CODEC_TYPE_VIDEO,

  1130.     CODEC_ID_INDEO3,

  1131.     sizeof(Indeo3DecodeContext),

  1132.     indeo3_decode_init,

  1133.     NULL,

  1134.     indeo3_decode_end,

  1135.     indeo3_decode_frame,

  1136.     0,

  1137.     NULL

  1138. };