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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 library is free software; you can redistribute it and/or

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

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

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. 

  20. #include <stdio.h>

  21. #include <stdlib.h>

  22. #include <string.h>

  23. #include <unistd.h>

  24. 

  25. #include "common.h"

  26. #include "avcodec.h"

  27. #include "dsputil.h"

  28. #include "mpegvideo.h"

  29. 

  30. #include "indeo3data.h"

  31. 

  32. typedef struct

  33. {

  34.   unsigned char *Ybuf;

  35.   unsigned char *Ubuf;

  36.   unsigned char *Vbuf;

  37.   unsigned char *the_buf;

  38.   unsigned int the_buf_size;

  39.   unsigned short y_w, y_h;

  40.   unsigned short uv_w, uv_h;

  41. } YUVBufs;

  42. 

  43. typedef struct Indeo3DecodeContext {

  44.     AVCodecContext *avctx;

  45.     int width, height;

  46.     AVFrame frame;

  47. 

  48.     YUVBufs iv_frame[2];

  49.     YUVBufs *cur_frame;

  50.     YUVBufs *ref_frame;

  51. 

  52.     unsigned char *ModPred;

  53.     unsigned short *corrector_type;

  54. } Indeo3DecodeContext;

  55. 

  56. static int corrector_type_0[24] = {

  57.   195, 159, 133, 115, 101,  93,  87,  77,

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

  59.   128,  79,  79,  79,  79,  79,  79,  79

  60. };

  61. 

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

  63. 

  64. static void build_modpred(Indeo3DecodeContext *s) 

  65. {

  66.   int i, j;

  67. 

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

  69. 

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

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

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

  73. 				 ? 236 : 2*((i + 2) - ((i + 1) % 3)));

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

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

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

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

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

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

  80.   }

  81. 

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

  83. 

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

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

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

  87. 				? 1 : ((j < 248 || (i == 16 && j == 248))

  88. 				       ? 0 : corrector_type_2[j - 248]);

  89.     }

  90.   }

  91. }

  92. 

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

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

  95.   long fflags2, unsigned char *hdr,

  96.   unsigned char *buf2, int min_width_160);

  97. 

  98. #ifndef min

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

  100. #endif

  101. 

  102. /* ---------------------------------------------------------------------- */

  103. static void iv_alloc_frames(Indeo3DecodeContext *s) 

  104. {

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

  106.       chroma_pixels, i;

  107.   unsigned int bufsize;

  108. 

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

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

  111. 

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

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

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

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

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

  117. 

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

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

  120.   luma_pixels = luma_width * luma_height;

  121.   chroma_pixels = chroma_width * chroma_height;

  122. 

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

  124.     (chroma_pixels + chroma_width) * 4;

  125. 

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

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

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

  129.     return;

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

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

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

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

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

  135. 

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

  137.   i = luma_pixels + luma_width * 2;

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

  139.   i += (luma_pixels + luma_width);

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

  141.   i += (chroma_pixels + chroma_width);

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

  143.   i += (chroma_pixels + chroma_width);

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

  145.   i += (chroma_pixels + chroma_width);

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

  147. 

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

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

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

  151. 

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

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

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

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

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

  157.   }

  158. }

  159. 

  160. /* ---------------------------------------------------------------------- */

  161. static void iv_free_func(Indeo3DecodeContext *s) 

  162. {

  163.   int i;

  164. 

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

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

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

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

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

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

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

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

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

  174.   }

  175. 

  176.   av_free(s->ModPred);

  177.   av_free(s->corrector_type);

  178. }

  179. 

  180. /* ---------------------------------------------------------------------- */

  181. static unsigned long iv_decode_frame(Indeo3DecodeContext *s, 

  182.                                      unsigned char *buf, int buf_size) 

  183. {

  184.   unsigned int hdr_width, hdr_height,

  185.     chroma_width, chroma_height;

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

  187.   unsigned char *hdr_pos, *buf_pos;

  188. 

  189.   buf_pos = buf;

  190.   buf_pos += 18;

  191. 

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

  193.   buf_pos += 2;

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

  195.   buf_pos += 4;

  196.   fflags2 = *buf_pos++;

  197.   buf_pos += 3;

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

  199.   buf_pos += 2;

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

  201.   

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

  203.       return -1;

  204.   

  205.   buf_pos += 2;

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

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

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

  209.   buf_pos += 4;

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

  211.   buf_pos += 4;

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

  213.   buf_pos += 8;

  214.   hdr_pos = buf_pos;

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

  216. 

  217.   if(fflags1 & 0x200) {

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

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

  220.   } else {

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

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

  223.   }

  224. 

  225.   buf_pos = buf + 16 + offs1;

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

  227.   buf_pos += 4;

  228. 

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

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

  231.     min(hdr_width, 160));

  232. 

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

  234.   {

  235. 

  236.   buf_pos = buf + 16 + offs2;

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

  238.   buf_pos += 4;

  239. 

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

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

  242.     min(chroma_width, 40));

  243. 

  244.   buf_pos = buf + 16 + offs3;

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

  246.   buf_pos += 4;

  247. 

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

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

  250.     min(chroma_width, 40));

  251. 

  252.   }

  253. 

  254.   return 8;

  255. }

  256. 

  257. typedef struct {

  258.   long xpos;

  259.   long ypos;

  260.   long width;

  261.   long height;

  262.   long split_flag;

  263.   long split_direction;

  264.   long usl7;

  265. } ustr_t;

  266. 

  267. /* ---------------------------------------------------------------------- */

  268. 

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

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

  271.     if(rle_v3 != 0)         \

  272.       rle_v3 = 0;           \

  273.     else {                  \

  274.       rle_v3 = 1;           \

  275.       buf1 -= 2;            \

  276.     }                       \

  277.   }                         \

  278.   lp2 = 4;

  279. 

  280. 

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

  282.   if(rle_v3 == 0) {         \

  283.     rle_v2 = *buf1;         \

  284.     rle_v1 = 1;             \

  285.     if(rle_v2 > 32) {       \

  286.       rle_v2 -= 32;         \

  287.       rle_v1 = 0;           \

  288.     }                       \

  289.     rle_v3 = 1;             \

  290.   }                         \

  291.   buf1--;

  292. 

  293. 

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

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

  296.     rle_v3 = 0;           \

  297.   else {                  \

  298.     buf1--;               \

  299.     rle_v3 = 1;           \

  300.   }

  301. 

  302. 

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

  304.   rle_v2--;             \

  305.   if(rle_v2 == 0) {     \

  306.     rle_v3 = 0;         \

  307.     buf1 += 2;          \

  308.   }                     \

  309.   lp2 = 4;

  310. 

  311. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  314.   unsigned char *buf2, int min_width_160)

  315. {

  316.   unsigned char bit_buf;

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

  318.   long *width_tbl, width_tbl_arr[10];

  319.   signed char *ref_vectors;

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

  321.   uint32_t *cur_lp, *ref_lp;

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

  323.   unsigned short *correction_type_sp[2];

  324.   ustr_t strip_tbl[20], *strip;

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

  326.     rle_v1, rle_v2, rle_v3;

  327.   unsigned short res;

  328. 

  329.   bit_buf = 0;

  330.   ref_vectors = NULL;

  331. 

  332.   width_tbl = width_tbl_arr + 1;

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

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

  335.     width_tbl[j] = i * j;

  336. 

  337.   strip = strip_tbl;

  338. 

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

  340. 

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

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

  343.   strip->height = height;

  344.   strip->split_direction = 0;

  345.   strip->split_flag = 0;

  346.   strip->usl7 = 0;

  347. 

  348.   bit_pos = 0;

  349. 

  350.   rle_v1 = rle_v2 = rle_v3 = 0;

  351. 

  352.   while(strip >= strip_tbl) {

  353.     if(bit_pos <= 0) {

  354.       bit_pos = 8;

  355.       bit_buf = *buf1++;

  356.     }

  357. 

  358.     bit_pos -= 2;

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

  360. 

  361.     if(cmd == 0) {

  362.       strip++;

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

  364.       strip->split_flag = 1;

  365.       strip->split_direction = 0;

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

  367.       continue;

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

  369.       strip++;

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

  371.       strip->split_flag = 1;

  372.       strip->split_direction = 1;

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

  374.       continue;

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

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

  377.         strip->usl7 = 1;

  378.         ref_vectors = NULL;

  379.         continue;

  380.       }

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

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

  383.         strip->usl7 = 1;

  384.         ref_vectors = buf2 + (*buf1 * 2);

  385.         buf1++;

  386.         continue;

  387.       }

  388.     }

  389. 

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

  391. 

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

  393.       blks_width += 3;

  394.     blks_width >>= 2;

  395.     blks_height = strip->height;

  396. 

  397.     if(ref_vectors != NULL) {

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

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

  400.     } else 

  401.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  402. 

  403.     if(cmd == 2) {

  404.       if(bit_pos <= 0) {

  405.         bit_pos = 8;

  406.         bit_buf = *buf1++;

  407.       }

  408. 

  409.       bit_pos -= 2;

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

  411. 

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

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

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

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

  416.           cur_frm_pos += 4;

  417.           ref_frm_pos += 4;

  418.         }

  419.       } else if(cmd != 1) 

  420.         return;

  421.     } else {

  422.       k = *buf1 >> 4;

  423.       j = *buf1 & 0x0f;

  424.       buf1++;

  425.       lv = j + fflags2;

  426. 

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

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

  429.         cp = ref_frm_pos;

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

  431.             int v = *cp >> 1;

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

  433.         }

  434.       }

  435. 

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

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

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

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

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

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

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

  443.       } else {

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

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

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

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

  448.       }

  449. 

  450.       switch(k) {

  451.         case 1:

  452.         case 0:                    /********** CASE 0 **********/

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

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

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

  456.                 k = *buf1++;

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

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

  459. 

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

  461.                   case 0:

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

  463.                     lp2++;

  464.                     break;

  465.                   case 1:

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

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

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

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

  470.                     lp2++;

  471.                     break;

  472.                   case 2:

  473.                     if(lp2 == 0) {

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

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

  476.                       lp2 += 2;

  477.                     }

  478.                     break;

  479.                   case 3:

  480.                     if(lp2 < 2) {

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

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

  483.                       lp2 = 3;

  484.                     }

  485.                     break;

  486.                   case 8:

  487.                     if(lp2 == 0) {

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

  489. 

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

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

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

  493.                       }

  494. 

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

  496.                       break;

  497.                     } else {

  498.                       rle_v1 = 1;

  499.                       rle_v2 = *buf1 - 1;

  500.                     }

  501.                   case 5:

  502.                       LP2_CHECK(buf1,rle_v3,lp2)

  503.                   case 4:

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

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

  506.                     lp2 = 4;

  507.                     break;

  508. 

  509.                   case 7:

  510.                     if(rle_v3 != 0) 

  511.                       rle_v3 = 0;

  512.                     else {

  513.                       buf1--;

  514.                       rle_v3 = 1;

  515.                     }

  516.                   case 6:

  517.                     if(ref_vectors != NULL) {

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

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

  520.                     }

  521.                     lp2 = 4;

  522.                     break;

  523. 

  524.                   case 9:

  525.                     lv1 = *buf1++;

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

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

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

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

  530.                       cur_lp[j] = lv;

  531. 

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

  533.                     break;

  534.                   default: 

  535.                     return;

  536.                 }

  537.               }

  538. 

  539.               cur_frm_pos += 4;

  540.               ref_frm_pos += 4;

  541.             }

  542. 

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

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

  545.           }

  546.           break;

  547. 

  548.         case 4:

  549.         case 3:                    /********** CASE 3 **********/

  550.           if(ref_vectors != NULL) 

  551.             return;

  552.           flag1 = 1;

  553. 

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

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

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

  557.                 k = *buf1++;

  558. 

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

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

  561. 

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

  563.                   case 0:

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

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

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

  567.                     else

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

  569.                     lp2++;

  570.                     break;

  571. 

  572.                   case 1:

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

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

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

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

  577. 

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

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

  580.                     else

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

  582.                     lp2++;

  583.                     break;

  584. 

  585.                   case 2:

  586.                     if(lp2 == 0) {

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

  588.                         cur_lp[j] = *ref_lp;

  589.                       lp2 += 2;

  590.                     }

  591.                     break;

  592. 

  593.                   case 3:

  594.                     if(lp2 < 2) {

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

  596.                         cur_lp[j] = *ref_lp;

  597.                       lp2 = 3;

  598.                     }

  599.                     break;

  600. 

  601.                   case 6:

  602.                     lp2 = 4;

  603.                     break;

  604. 

  605.                   case 7:

  606.                     if(rle_v3 != 0) 

  607.                       rle_v3 = 0;

  608.                     else {

  609.                       buf1--;

  610.                       rle_v3 = 1;

  611.                     }

  612.                     lp2 = 4;

  613.                     break;

  614. 

  615.                   case 8:

  616.                     if(lp2 == 0) {

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

  618. 

  619.                       if(rle_v1 == 1) {

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

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

  622.                       }

  623. 

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

  625.                       break;

  626.                     } else {

  627.                       rle_v2 = (*buf1) - 1;

  628.                       rle_v1 = 1;

  629.                     }

  630.                   case 5:

  631.                       LP2_CHECK(buf1,rle_v3,lp2)

  632.                   case 4:

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

  634.                       cur_lp[j] = *ref_lp;

  635.                     lp2 = 4;

  636.                     break;

  637. 

  638.                   case 9:

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

  640.                     lv1 = *buf1++;

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

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

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

  644. 

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

  646.                       cur_lp[j] = lv;

  647. 

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

  649.                     break;

  650. 

  651.                   default: 

  652.                     return;

  653.                 }

  654.               }

  655. 

  656.               cur_frm_pos += 4;

  657.             }

  658. 

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

  660.             flag1 = 0;

  661.           }

  662.           break;

  663. 

  664.         case 10:                    /********** CASE 10 **********/

  665.           if(ref_vectors == NULL) {

  666.             flag1 = 1;

  667. 

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

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

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

  671.                   k = *buf1++;

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

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

  674.                   lv1 = ref_lp[0];

  675.                   lv2 = ref_lp[1];

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

  677. #ifdef WORDS_BIGENDIAN

  678.                     lv1 = lv1 & 0xFF00FF00;

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

  680.                     lv2 = lv2 & 0xFF00FF00;

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

  682. #else

  683.                     lv1 = lv1 & 0x00FF00FF;

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

  685.                     lv2 = lv2 & 0x00FF00FF;

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

  687. #endif

  688.                   }

  689. 

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

  691.                     case 0:

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

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

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

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

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

  697.                       } else {

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

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

  700.                       }

  701.                       lp2++;

  702.                       break;

  703. 

  704.                     case 1:

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

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

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

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

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

  710.                       } else {

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

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

  713.                       }

  714.                       lp2++;

  715.                       break;

  716. 

  717.                     case 2:

  718.                       if(lp2 == 0) {

  719.                         if(flag1 != 0) {

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

  721.                             cur_lp[j] = lv1;

  722.                             cur_lp[j+1] = lv2;

  723.                           }

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

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

  726.                         } else {

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

  728.                             cur_lp[j] = lv1;

  729.                             cur_lp[j+1] = lv2;

  730.                           }

  731.                         }

  732.                         lp2 += 2;

  733.                       }

  734.                       break;

  735. 

  736.                     case 3:

  737.                       if(lp2 < 2) {

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

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

  740.                             cur_lp[j] = lv1;

  741.                             cur_lp[j+1] = lv2;

  742.                           }

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

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

  745.                         } else {

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

  747.                             cur_lp[j] = lv1;

  748.                             cur_lp[j+1] = lv2;

  749.                           }

  750.                         }

  751.                         lp2 = 3;

  752.                       }

  753.                       break;

  754. 

  755.                     case 8:

  756.                       if(lp2 == 0) {

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

  758.                         if(rle_v1 == 1) {

  759.                           if(flag1 != 0) {

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

  761.                               cur_lp[j] = lv1;

  762.                               cur_lp[j+1] = lv2;

  763.                             }

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

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

  766.                           } else {

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

  768.                               cur_lp[j] = lv1;

  769.                               cur_lp[j+1] = lv2;

  770.                             }

  771.                           }

  772.                         }

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

  774.                         break;

  775.                       } else {

  776.                         rle_v1 = 1;

  777.                         rle_v2 = (*buf1) - 1;

  778.                       }

  779.                     case 5:

  780.                         LP2_CHECK(buf1,rle_v3,lp2)

  781.                     case 4:

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

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

  784.                           cur_lp[j] = lv1;

  785.                           cur_lp[j+1] = lv2;

  786.                         }

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

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

  789.                       } else {

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

  791.                           cur_lp[j] = lv1;

  792.                           cur_lp[j+1] = lv2;

  793.                         }

  794.                       }

  795.                       lp2 = 4;

  796.                       break;

  797. 

  798.                     case 6:

  799.                       lp2 = 4;

  800.                       break;

  801. 

  802.                     case 7:

  803.                       if(lp2 == 0) {

  804.                         if(rle_v3 != 0) 

  805.                           rle_v3 = 0;

  806.                         else {

  807.                           buf1--;

  808.                           rle_v3 = 1;

  809.                         }

  810.                         lp2 = 4;

  811.                       }

  812.                       break;

  813. 

  814.                     case 9:

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

  816.                       lv1 = *buf1;

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

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

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

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

  821.                         cur_lp[j] = lv;

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

  823.                       break;

  824. 

  825.                     default: 

  826.                       return;

  827.                   }

  828.                 }

  829. 

  830.                 cur_frm_pos += 8;

  831.               }

  832. 

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

  834.               flag1 = 0;

  835.             }

  836.           } else {

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

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

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

  840.                   k = *buf1++;

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

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

  843. 

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

  845.                     case 0:

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

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

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

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

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

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

  852.                       lp2++;

  853.                       break;

  854. 

  855.                     case 1:

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

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

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

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

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

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

  862.                       lp2++;

  863.                       break;

  864. 

  865.                     case 2:

  866.                       if(lp2 == 0) {

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

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

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

  870.                         }

  871.                         lp2 += 2;

  872.                       }

  873.                       break;

  874. 

  875.                     case 3:

  876.                       if(lp2 < 2) {

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

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

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

  880.                         }

  881.                         lp2 = 3;

  882.                       }

  883.                       break;

  884. 

  885.                     case 8:

  886.                       if(lp2 == 0) {

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

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

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

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

  891.                         }

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

  893.                         break;

  894.                       } else {

  895.                         rle_v1 = 1;

  896.                         rle_v2 = (*buf1) - 1;

  897.                       }

  898.                     case 5:

  899.                     case 7:

  900.                         LP2_CHECK(buf1,rle_v3,lp2)

  901.                     case 6:

  902.                     case 4:

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

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

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

  906.                       }

  907.                       lp2 = 4;

  908.                       break;

  909. 

  910.                     case 9:

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

  912.                       lv1 = *buf1;

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

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

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

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

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

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

  919.                       break;

  920. 

  921.                     default: 

  922.                       return;

  923.                   }

  924.                 }

  925. 

  926.                 cur_frm_pos += 8;

  927.                 ref_frm_pos += 8;

  928.               }

  929. 

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

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

  932.             }

  933.           }

  934.           break;

  935. 

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

  937.           if(ref_vectors == NULL) 

  938.             return;

  939. 

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

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

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

  943.                 k = *buf1++;

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

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

  946. 

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

  948.                   case 0:

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

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

  951.                     lp2++;

  952.                     break;

  953. 

  954.                   case 1:

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

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

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

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

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

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

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

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

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

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

  965.                     lp2++;

  966.                     break;

  967. 

  968.                   case 2:

  969.                     if(lp2 == 0) {

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

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

  972.                       lp2 += 2;

  973.                     }

  974.                     break;

  975. 

  976.                   case 3:

  977.                     if(lp2 < 2) {

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

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

  980.                       lp2 = 3;

  981.                     }

  982.                     break;

  983. 

  984.                   case 8:

  985.                     if(lp2 == 0) {

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

  987. 

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

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

  990. 

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

  992.                       break;

  993.                     } else {

  994.                       rle_v1 = 1;

  995.                       rle_v2 = (*buf1) - 1;

  996.                     }

  997.                   case 5:

  998.                   case 7:

  999.                       LP2_CHECK(buf1,rle_v3,lp2)

  1000.                   case 4:

  1001.                   case 6:

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

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

  1004.                     lp2 = 4;

  1005.                     break;

  1006. 

  1007.                 case 9:

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

  1009.                   lv1 = *buf1++;

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

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

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

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

  1014.                     cur_lp[j] = lv;

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

  1016.                   break;

  1017. 

  1018.                   default: 

  1019.                     return;

  1020.                 }

  1021.               }

  1022. 

  1023.               cur_frm_pos += 4;

  1024.               ref_frm_pos += 4;

  1025.             }

  1026. 

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

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

  1029.           }

  1030.           break;

  1031. 

  1032.         default: 

  1033.           return;

  1034.       }

  1035.     }

  1036. 

  1037.     if(strip < strip_tbl) 

  1038.       return;

  1039. 

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

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

  1042.         strip->split_flag = 0;

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

  1044. 

  1045.         if(strip->split_direction) {

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

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

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

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

  1050.         } else {

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

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

  1053.         }

  1054.         break;

  1055.       }

  1056.     }

  1057.   }

  1058. }

  1059. 

  1060. static int indeo3_decode_init(AVCodecContext *avctx)

  1061. {

  1062.     Indeo3DecodeContext *s = avctx->priv_data;

  1063. 

  1064.     s->avctx = avctx;

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

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

  1067.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1068.     avctx->has_b_frames = 0;

  1069. 

  1070.     build_modpred(s);

  1071.     iv_alloc_frames(s);

  1072. 

  1073.     return 0;

  1074. }

  1075. 

  1076. static int indeo3_decode_frame(AVCodecContext *avctx,

  1077.                                void *data, int *data_size,

  1078.                                unsigned char *buf, int buf_size)

  1079. {

  1080.     Indeo3DecodeContext *s=avctx->priv_data;

  1081.     unsigned char *src, *dest;

  1082.     int y;

  1083. 

  1084.     iv_decode_frame(s, buf, buf_size);

  1085. 

  1086.     if(s->frame.data[0])

  1087.         avctx->release_buffer(avctx, &s->frame);

  1088. 

  1089.     s->frame.reference = 0;

  1090.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1091.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1092.         return -1;

  1093.     }

  1094. 

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

  1096.     dest = s->frame.data[0];

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

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

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

  1100.       dest += s->frame.linesize[0];

  1101.     }

  1102. 

  1103.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1104.     {

  1105.     src = s->cur_frame->Ubuf;

  1106.     dest = s->frame.data[1];

  1107.     for (y = 0; y < s->height / 4; y++) {

  1108.       memcpy(dest, src, s->cur_frame->uv_w);

  1109.       src += s->cur_frame->uv_w;

  1110.       dest += s->frame.linesize[1];

  1111.     }

  1112. 

  1113.     src = s->cur_frame->Vbuf;

  1114.     dest = s->frame.data[2];

  1115.     for (y = 0; y < s->height / 4; y++) {

  1116.       memcpy(dest, src, s->cur_frame->uv_w);

  1117.       src += s->cur_frame->uv_w;

  1118.       dest += s->frame.linesize[2];

  1119.     }

  1120.     }

  1121. 

  1122.     *data_size=sizeof(AVFrame);

  1123.     *(AVFrame*)data= s->frame;

  1124. 

  1125.     return buf_size;

  1126. }

  1127. 

  1128. static int indeo3_decode_end(AVCodecContext *avctx)

  1129. {

  1130.     Indeo3DecodeContext *s = avctx->priv_data;

  1131. 

  1132.     iv_free_func(s);

  1133. 

  1134.     return 0;

  1135. }

  1136. 

  1137. AVCodec indeo3_decoder = {

  1138.     "indeo3",

  1139.     CODEC_TYPE_VIDEO,

  1140.     CODEC_ID_INDEO3,

  1141.     sizeof(Indeo3DecodeContext),

  1142.     indeo3_decode_init,

  1143.     NULL,

  1144.     indeo3_decode_end,

  1145.     indeo3_decode_frame,

  1146.     0,

  1147.     NULL

  1148. };