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FFmpeg/libavcodec/indeo3.c

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  1. /*

  2.  * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg

  3.  * written, produced, and directed by Alan Smithee

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

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

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

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

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

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

  15.  * Lesser General Public License for more details.

  16.  *

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

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. #include <stdio.h>

  23. #include <stdlib.h>

  24. #include <string.h>

  25. #include <unistd.h>

  26. 

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "bytestream.h"

  30. 

  31. #include "indeo3data.h"

  32. 

  33. typedef struct

  34. {

  35.     uint8_t *Ybuf;

  36.     uint8_t *Ubuf;

  37.     uint8_t *Vbuf;

  38.     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.     uint8_t *buf;

  49.     YUVBufs iv_frame[2];

  50.     YUVBufs *cur_frame;

  51.     YUVBufs *ref_frame;

  52. 

  53.     uint8_t *ModPred;

  54.     uint8_t *corrector_type;

  55. } Indeo3DecodeContext;

  56. 

  57. static const uint8_t corrector_type_0[24] = {

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

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

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

  61. };

  62. 

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

  64. 

  65. static av_cold int build_modpred(Indeo3DecodeContext *s)

  66. {

  67.     int i, j;

  68. 

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

  70.         return AVERROR(ENOMEM);

  71. 

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

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

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

  75.                               i == 119 ||

  76.                               i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));

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

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

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

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

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

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

  83.     }

  84. 

  85.     if (!(s->corrector_type = av_malloc(24 * 256)))

  86.         return AVERROR(ENOMEM);

  87. 

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

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

  90.             s->corrector_type[i*256+j] = j < corrector_type_0[i]          ? 1 :

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

  92.                                          corrector_type_2[j - 248];

  93.         }

  94.     }

  95. 

  96.   return 0;

  97. }

  98. 

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

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

  101.         long fflags2, const uint8_t *hdr,

  102.         const uint8_t *buf2, int min_width_160);

  103. 

  104. static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)

  105. {

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

  107.         chroma_pixels, i;

  108.     unsigned int bufsize;

  109. 

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

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

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

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

  114.     luma_pixels = luma_width * luma_height;

  115.     chroma_pixels = chroma_width * chroma_height;

  116. 

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

  118.         (chroma_pixels + chroma_width) * 4;

  119. 

  120.     if(!(s->buf = av_malloc(bufsize)))

  121.         return AVERROR(ENOMEM);

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

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

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

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

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

  127. 

  128.     s->iv_frame[0].Ybuf = s->buf + luma_width;

  129.     i = luma_pixels + luma_width * 2;

  130.     s->iv_frame[1].Ybuf = s->buf + i;

  131.     i += (luma_pixels + luma_width);

  132.     s->iv_frame[0].Ubuf = s->buf + i;

  133.     i += (chroma_pixels + chroma_width);

  134.     s->iv_frame[1].Ubuf = s->buf + i;

  135.     i += (chroma_pixels + chroma_width);

  136.     s->iv_frame[0].Vbuf = s->buf + i;

  137.     i += (chroma_pixels + chroma_width);

  138.     s->iv_frame[1].Vbuf = s->buf + i;

  139. 

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

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

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

  143. 

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

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

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

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

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

  149.     }

  150. 

  151.     return 0;

  152. }

  153. 

  154. static av_cold void iv_free_func(Indeo3DecodeContext *s)

  155. {

  156.     av_free(s->buf);

  157.     av_free(s->ModPred);

  158.     av_free(s->corrector_type);

  159. }

  160. 

  161. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  162.                                      const uint8_t *buf, int buf_size)

  163. {

  164.     unsigned int hdr_width, hdr_height,

  165.                  chroma_width, chroma_height;

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

  167.     const uint8_t *hdr_pos, *buf_pos;

  168. 

  169.     buf_pos = buf;

  170.     buf_pos += 18;

  171. 

  172.     fflags1 = bytestream_get_le16(&buf_pos);

  173.     fflags3 = bytestream_get_le32(&buf_pos);

  174.     fflags2 = *buf_pos++;

  175.     buf_pos += 3;

  176.     hdr_height = bytestream_get_le16(&buf_pos);

  177.     hdr_width  = bytestream_get_le16(&buf_pos);

  178. 

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

  180.         return -1;

  181. 

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

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

  184.     offs1 = bytestream_get_le32(&buf_pos);

  185.     offs2 = bytestream_get_le32(&buf_pos);

  186.     offs3 = bytestream_get_le32(&buf_pos);

  187.     buf_pos += 4;

  188.     hdr_pos = buf_pos;

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

  190. 

  191.     if(fflags1 & 0x200) {

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

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

  194.     } else {

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

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

  197.     }

  198. 

  199.     buf_pos = buf + 16 + offs1;

  200.     offs = bytestream_get_le32(&buf_pos);

  201. 

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

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

  204.                     FFMIN(hdr_width, 160));

  205. 

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

  207.     {

  208. 

  209.         buf_pos = buf + 16 + offs2;

  210.         offs = bytestream_get_le32(&buf_pos);

  211. 

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

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

  214.                 FFMIN(chroma_width, 40));

  215. 

  216.         buf_pos = buf + 16 + offs3;

  217.         offs = bytestream_get_le32(&buf_pos);

  218. 

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

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

  221.                 FFMIN(chroma_width, 40));

  222. 

  223.     }

  224. 

  225.     return 8;

  226. }

  227. 

  228. typedef struct {

  229.     long xpos;

  230.     long ypos;

  231.     long width;

  232.     long height;

  233.     long split_flag;

  234.     long split_direction;

  235.     long usl7;

  236. } ustr_t;

  237. 

  238. 

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

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

  241.         if(rle_v3 != 0)                 \

  242.             rle_v3 = 0;                 \

  243.         else {                          \

  244.             rle_v3 = 1;                 \

  245.             buf1 -= 2;                  \

  246.         }                               \

  247.     }                                   \

  248.     lp2 = 4;

  249. 

  250. 

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

  252.     if(rle_v3 == 0) {                            \

  253.         rle_v2 = *buf1;                          \

  254.         rle_v1 = 1;                              \

  255.         if(rle_v2 > 32) {                        \

  256.             rle_v2 -= 32;                        \

  257.             rle_v1 = 0;                          \

  258.         }                                        \

  259.         rle_v3 = 1;                              \

  260.     }                                            \

  261.     buf1--;

  262. 

  263. 

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

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

  266.         rle_v3 = 0;                 \

  267.     else {                          \

  268.         buf1--;                     \

  269.         rle_v3 = 1;                 \

  270.     }

  271. 

  272. 

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

  274.     rle_v2--;                                 \

  275.     if(rle_v2 == 0) {                         \

  276.         rle_v3 = 0;                           \

  277.         buf1 += 2;                            \

  278.     }                                         \

  279.     lp2 = 4;

  280. 

  281. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  284.         const uint8_t *buf2, int min_width_160)

  285. {

  286.     uint8_t bit_buf;

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

  288.     long *width_tbl, width_tbl_arr[10];

  289.     const signed char *ref_vectors;

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

  291.     uint32_t *cur_lp, *ref_lp;

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

  293.     uint8_t *correction_type_sp[2];

  294.     ustr_t strip_tbl[20], *strip;

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

  296.         rle_v1, rle_v2, rle_v3;

  297.     unsigned short res;

  298. 

  299.     bit_buf = 0;

  300.     ref_vectors = NULL;

  301. 

  302.     width_tbl = width_tbl_arr + 1;

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

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

  305.         width_tbl[j] = i * j;

  306. 

  307.     strip = strip_tbl;

  308. 

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

  310. 

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

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

  313.     strip->height = height;

  314.     strip->split_direction = 0;

  315.     strip->split_flag = 0;

  316.     strip->usl7 = 0;

  317. 

  318.     bit_pos = 0;

  319. 

  320.     rle_v1 = rle_v2 = rle_v3 = 0;

  321. 

  322.     while(strip >= strip_tbl) {

  323.         if(bit_pos <= 0) {

  324.             bit_pos = 8;

  325.             bit_buf = *buf1++;

  326.         }

  327. 

  328.         bit_pos -= 2;

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

  330. 

  331.         if(cmd == 0) {

  332.             strip++;

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

  334.             strip->split_flag = 1;

  335.             strip->split_direction = 0;

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

  337.             continue;

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

  339.             strip++;

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

  341.             strip->split_flag = 1;

  342.             strip->split_direction = 1;

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

  344.             continue;

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

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

  347.                 strip->usl7 = 1;

  348.                 ref_vectors = NULL;

  349.                 continue;

  350.             }

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

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

  353.                 strip->usl7 = 1;

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

  355.                 buf1++;

  356.                 continue;

  357.             }

  358.         }

  359. 

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

  361. 

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

  363.             blks_width += 3;

  364.         blks_width >>= 2;

  365.         blks_height = strip->height;

  366. 

  367.         if(ref_vectors != NULL) {

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

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

  370.         } else

  371.             ref_frm_pos = cur_frm_pos - width_tbl[4];

  372. 

  373.         if(cmd == 2) {

  374.             if(bit_pos <= 0) {

  375.                 bit_pos = 8;

  376.                 bit_buf = *buf1++;

  377.             }

  378. 

  379.             bit_pos -= 2;

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

  381. 

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

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

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

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

  386.                     cur_frm_pos += 4;

  387.                     ref_frm_pos += 4;

  388.                 }

  389.             } else if(cmd != 1)

  390.                 return;

  391.         } else {

  392.             k = *buf1 >> 4;

  393.             j = *buf1 & 0x0f;

  394.             buf1++;

  395.             lv = j + fflags2;

  396. 

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

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

  399.                 cp = ref_frm_pos;

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

  401.                     int v = *cp >> 1;

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

  403.                 }

  404.             }

  405. 

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

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

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

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

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

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

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

  413.             } else {

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

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

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

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

  418.             }

  419. 

  420.             switch(k) {

  421.             case 1:

  422.             case 0:                    /********** CASE 0 **********/

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

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

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

  426.                             k = *buf1++;

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

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

  429. 

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

  431.                             case 0:

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

  433.                                 lp2++;

  434.                                 break;

  435.                             case 1:

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

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

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

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

  440.                                 buf1++;

  441.                                 lp2++;

  442.                                 break;

  443.                             case 2:

  444.                                 if(lp2 == 0) {

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

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

  447.                                     lp2 += 2;

  448.                                 }

  449.                                 break;

  450.                             case 3:

  451.                                 if(lp2 < 2) {

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

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

  454.                                     lp2 = 3;

  455.                                 }

  456.                                 break;

  457.                             case 8:

  458.                                 if(lp2 == 0) {

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

  460. 

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

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

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

  464.                                         }

  465. 

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

  467.                                         break;

  468.                                 } else {

  469.                                     rle_v1 = 1;

  470.                                     rle_v2 = *buf1 - 1;

  471.                                 }

  472.                             case 5:

  473.                                 LP2_CHECK(buf1,rle_v3,lp2)

  474.                             case 4:

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

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

  477.                                 lp2 = 4;

  478.                                 break;

  479. 

  480.                             case 7:

  481.                                 if(rle_v3 != 0)

  482.                                     rle_v3 = 0;

  483.                                 else {

  484.                                     buf1--;

  485.                                     rle_v3 = 1;

  486.                                 }

  487.                             case 6:

  488.                                 if(ref_vectors != NULL) {

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

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

  491.                                 }

  492.                                 lp2 = 4;

  493.                                 break;

  494. 

  495.                             case 9:

  496.                                 lv1 = *buf1++;

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

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

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

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

  501.                                     cur_lp[j] = lv;

  502. 

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

  504.                                     break;

  505.                             default:

  506.                                 return;

  507.                             }

  508.                         }

  509. 

  510.                         cur_frm_pos += 4;

  511.                         ref_frm_pos += 4;

  512.                     }

  513. 

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

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

  516.                 }

  517.                 break;

  518. 

  519.             case 4:

  520.             case 3:                    /********** CASE 3 **********/

  521.                 if(ref_vectors != NULL)

  522.                     return;

  523.                 flag1 = 1;

  524. 

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

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

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

  528.                             k = *buf1++;

  529. 

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

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

  532. 

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

  534.                             case 0:

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

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

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

  538.                                 else

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

  540.                                 lp2++;

  541.                                 break;

  542. 

  543.                             case 1:

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

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

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

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

  548. 

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

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

  551.                                 else

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

  553.                                 buf1++;

  554.                                 lp2++;

  555.                                 break;

  556. 

  557.                             case 2:

  558.                                 if(lp2 == 0) {

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

  560.                                         cur_lp[j] = *ref_lp;

  561.                                     lp2 += 2;

  562.                                 }

  563.                                 break;

  564. 

  565.                             case 3:

  566.                                 if(lp2 < 2) {

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

  568.                                         cur_lp[j] = *ref_lp;

  569.                                     lp2 = 3;

  570.                                 }

  571.                                 break;

  572. 

  573.                             case 6:

  574.                                 lp2 = 4;

  575.                                 break;

  576. 

  577.                             case 7:

  578.                                 if(rle_v3 != 0)

  579.                                     rle_v3 = 0;

  580.                                 else {

  581.                                     buf1--;

  582.                                     rle_v3 = 1;

  583.                                 }

  584.                                 lp2 = 4;

  585.                                 break;

  586. 

  587.                             case 8:

  588.                                 if(lp2 == 0) {

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

  590. 

  591.                                     if(rle_v1 == 1) {

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

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

  594.                                     }

  595. 

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

  597.                                     break;

  598.                                 } else {

  599.                                     rle_v2 = (*buf1) - 1;

  600.                                     rle_v1 = 1;

  601.                                 }

  602.                             case 5:

  603.                                 LP2_CHECK(buf1,rle_v3,lp2)

  604.                             case 4:

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

  606.                                     cur_lp[j] = *ref_lp;

  607.                                 lp2 = 4;

  608.                                 break;

  609. 

  610.                             case 9:

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

  612.                                 lv1 = *buf1++;

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

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

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

  616. 

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

  618.                                     cur_lp[j] = lv;

  619. 

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

  621.                                 break;

  622. 

  623.                             default:

  624.                                 return;

  625.                             }

  626.                         }

  627. 

  628.                         cur_frm_pos += 4;

  629.                     }

  630. 

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

  632.                     flag1 = 0;

  633.                 }

  634.                 break;

  635. 

  636.             case 10:                    /********** CASE 10 **********/

  637.                 if(ref_vectors == NULL) {

  638.                     flag1 = 1;

  639. 

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

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

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

  643.                                 k = *buf1++;

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

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

  646.                                 lv1 = ref_lp[0];

  647.                                 lv2 = ref_lp[1];

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

  649. #ifdef WORDS_BIGENDIAN

  650.                                     lv1 = lv1 & 0xFF00FF00;

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

  652.                                     lv2 = lv2 & 0xFF00FF00;

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

  654. #else

  655.                                     lv1 = lv1 & 0x00FF00FF;

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

  657.                                     lv2 = lv2 & 0x00FF00FF;

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

  659. #endif

  660.                                 }

  661. 

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

  663.                                 case 0:

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

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

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

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

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

  669.                                     } else {

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

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

  672.                                     }

  673.                                     lp2++;

  674.                                     break;

  675. 

  676.                                 case 1:

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

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

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

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

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

  682.                                     } else {

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

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

  685.                                     }

  686.                                     buf1++;

  687.                                     lp2++;

  688.                                     break;

  689. 

  690.                                 case 2:

  691.                                     if(lp2 == 0) {

  692.                                         if(flag1 != 0) {

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

  694.                                                 cur_lp[j] = lv1;

  695.                                                 cur_lp[j+1] = lv2;

  696.                                             }

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

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

  699.                                         } else {

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

  701.                                                 cur_lp[j] = lv1;

  702.                                                 cur_lp[j+1] = lv2;

  703.                                             }

  704.                                         }

  705.                                         lp2 += 2;

  706.                                     }

  707.                                     break;

  708. 

  709.                                 case 3:

  710.                                     if(lp2 < 2) {

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

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

  713.                                                 cur_lp[j] = lv1;

  714.                                                 cur_lp[j+1] = lv2;

  715.                                             }

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

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

  718.                                         } else {

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

  720.                                                 cur_lp[j] = lv1;

  721.                                                 cur_lp[j+1] = lv2;

  722.                                             }

  723.                                         }

  724.                                         lp2 = 3;

  725.                                     }

  726.                                     break;

  727. 

  728.                                 case 8:

  729.                                     if(lp2 == 0) {

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

  731.                                         if(rle_v1 == 1) {

  732.                                             if(flag1 != 0) {

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

  734.                                                     cur_lp[j] = lv1;

  735.                                                     cur_lp[j+1] = lv2;

  736.                                                 }

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

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

  739.                                             } else {

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

  741.                                                     cur_lp[j] = lv1;

  742.                                                     cur_lp[j+1] = lv2;

  743.                                                 }

  744.                                             }

  745.                                         }

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

  747.                                         break;

  748.                                     } else {

  749.                                         rle_v1 = 1;

  750.                                         rle_v2 = (*buf1) - 1;

  751.                                     }

  752.                                 case 5:

  753.                                     LP2_CHECK(buf1,rle_v3,lp2)

  754.                                 case 4:

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

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

  757.                                             cur_lp[j] = lv1;

  758.                                             cur_lp[j+1] = lv2;

  759.                                         }

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

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

  762.                                     } else {

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

  764.                                             cur_lp[j] = lv1;

  765.                                             cur_lp[j+1] = lv2;

  766.                                         }

  767.                                     }

  768.                                     lp2 = 4;

  769.                                     break;

  770. 

  771.                                 case 6:

  772.                                     lp2 = 4;

  773.                                     break;

  774. 

  775.                                 case 7:

  776.                                     if(lp2 == 0) {

  777.                                         if(rle_v3 != 0)

  778.                                             rle_v3 = 0;

  779.                                         else {

  780.                                             buf1--;

  781.                                             rle_v3 = 1;

  782.                                         }

  783.                                         lp2 = 4;

  784.                                     }

  785.                                     break;

  786. 

  787.                                 case 9:

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

  789.                                     lv1 = *buf1;

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

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

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

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

  794.                                         cur_lp[j] = lv;

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

  796.                                     break;

  797. 

  798.                                 default:

  799.                                     return;

  800.                                 }

  801.                             }

  802. 

  803.                             cur_frm_pos += 8;

  804.                         }

  805. 

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

  807.                         flag1 = 0;

  808.                     }

  809.                 } else {

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

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

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

  813.                                 k = *buf1++;

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

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

  816. 

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

  818.                                 case 0:

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

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

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

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

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

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

  825.                                     lp2++;

  826.                                     break;

  827. 

  828.                                 case 1:

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

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

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

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

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

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

  835.                                     lp2++;

  836.                                     break;

  837. 

  838.                                 case 2:

  839.                                     if(lp2 == 0) {

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

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

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

  843.                                         }

  844.                                         lp2 += 2;

  845.                                     }

  846.                                     break;

  847. 

  848.                                 case 3:

  849.                                     if(lp2 < 2) {

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

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

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

  853.                                         }

  854.                                         lp2 = 3;

  855.                                     }

  856.                                     break;

  857. 

  858.                                 case 8:

  859.                                     if(lp2 == 0) {

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

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

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

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

  864.                                         }

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

  866.                                         break;

  867.                                     } else {

  868.                                         rle_v1 = 1;

  869.                                         rle_v2 = (*buf1) - 1;

  870.                                     }

  871.                                 case 5:

  872.                                 case 7:

  873.                                     LP2_CHECK(buf1,rle_v3,lp2)

  874.                                 case 6:

  875.                                 case 4:

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

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

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

  879.                                     }

  880.                                     lp2 = 4;

  881.                                     break;

  882. 

  883.                                 case 9:

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

  885.                                     lv1 = *buf1;

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

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

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

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

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

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

  892.                                     break;

  893. 

  894.                                 default:

  895.                                     return;

  896.                                 }

  897.                             }

  898. 

  899.                             cur_frm_pos += 8;

  900.                             ref_frm_pos += 8;

  901.                         }

  902. 

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

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

  905.                     }

  906.                 }

  907.                 break;

  908. 

  909.             case 11:                    /********** CASE 11 **********/

  910.                 if(ref_vectors == NULL)

  911.                     return;

  912. 

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

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

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

  916.                             k = *buf1++;

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

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

  919. 

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

  921.                             case 0:

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

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

  924.                                 lp2++;

  925.                                 break;

  926. 

  927.                             case 1:

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

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

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

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

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

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

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

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

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

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

  938.                                 lp2++;

  939.                                 break;

  940. 

  941.                             case 2:

  942.                                 if(lp2 == 0) {

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

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

  945.                                     lp2 += 2;

  946.                                 }

  947.                                 break;

  948. 

  949.                             case 3:

  950.                                 if(lp2 < 2) {

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

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

  953.                                     lp2 = 3;

  954.                                 }

  955.                                 break;

  956. 

  957.                             case 8:

  958.                                 if(lp2 == 0) {

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

  960. 

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

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

  963. 

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

  965.                                     break;

  966.                                 } else {

  967.                                     rle_v1 = 1;

  968.                                     rle_v2 = (*buf1) - 1;

  969.                                 }

  970.                             case 5:

  971.                             case 7:

  972.                                 LP2_CHECK(buf1,rle_v3,lp2)

  973.                             case 4:

  974.                             case 6:

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

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

  977.                                 lp2 = 4;

  978.                                 break;

  979. 

  980.                             case 9:

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

  982.                                 lv1 = *buf1++;

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

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

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

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

  987.                                     cur_lp[j] = lv;

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

  989.                                 break;

  990. 

  991.                             default:

  992.                                 return;

  993.                             }

  994.                         }

  995. 

  996.                         cur_frm_pos += 4;

  997.                         ref_frm_pos += 4;

  998.                     }

  999. 

  1000.                     cur_frm_pos += (((width * 2) - blks_width) * 4);

  1001.                     ref_frm_pos += (((width * 2) - blks_width) * 4);

  1002.                 }

  1003.                 break;

  1004. 

  1005.             default:

  1006.                 return;

  1007.             }

  1008.         }

  1009. 

  1010.         if(strip < strip_tbl)

  1011.             return;

  1012. 

  1013.         for( ; strip >= strip_tbl; strip--) {

  1014.             if(strip->split_flag != 0) {

  1015.                 strip->split_flag = 0;

  1016.                 strip->usl7 = (strip-1)->usl7;

  1017. 

  1018.                 if(strip->split_direction) {

  1019.                     strip->xpos += strip->width;

  1020.                     strip->width = (strip-1)->width - strip->width;

  1021.                     if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1022.                         strip->width = width - strip->xpos;

  1023.                 } else {

  1024.                     strip->ypos += strip->height;

  1025.                     strip->height = (strip-1)->height - strip->height;

  1026.                 }

  1027.                 break;

  1028.             }

  1029.         }

  1030.     }

  1031. }

  1032. 

  1033. static av_cold int indeo3_decode_init(AVCodecContext *avctx)

  1034. {

  1035.     Indeo3DecodeContext *s = avctx->priv_data;

  1036.     int ret = 0;

  1037. 

  1038.     s->avctx = avctx;

  1039.     s->width = avctx->width;

  1040.     s->height = avctx->height;

  1041.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1042. 

  1043.     if (!(ret = build_modpred(s)))

  1044.         ret = iv_alloc_frames(s);

  1045.     if (ret)

  1046.         iv_free_func(s);

  1047. 

  1048.     return ret;

  1049. }

  1050. 

  1051. static int indeo3_decode_frame(AVCodecContext *avctx,

  1052.                                void *data, int *data_size,

  1053.                                const uint8_t *buf, int buf_size)

  1054. {

  1055.     Indeo3DecodeContext *s=avctx->priv_data;

  1056.     uint8_t *src, *dest;

  1057.     int y;

  1058. 

  1059.     iv_decode_frame(s, buf, buf_size);

  1060. 

  1061.     if(s->frame.data[0])

  1062.         avctx->release_buffer(avctx, &s->frame);

  1063. 

  1064.     s->frame.reference = 0;

  1065.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1066.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1067.         return -1;

  1068.     }

  1069. 

  1070.     src = s->cur_frame->Ybuf;

  1071.     dest = s->frame.data[0];

  1072.     for (y = 0; y < s->height; y++) {

  1073.         memcpy(dest, src, s->cur_frame->y_w);

  1074.         src += s->cur_frame->y_w;

  1075.         dest += s->frame.linesize[0];

  1076.     }

  1077. 

  1078.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1079.     {

  1080.         src = s->cur_frame->Ubuf;

  1081.         dest = s->frame.data[1];

  1082.         for (y = 0; y < s->height / 4; y++) {

  1083.             memcpy(dest, src, s->cur_frame->uv_w);

  1084.             src += s->cur_frame->uv_w;

  1085.             dest += s->frame.linesize[1];

  1086.         }

  1087. 

  1088.         src = s->cur_frame->Vbuf;

  1089.         dest = s->frame.data[2];

  1090.         for (y = 0; y < s->height / 4; y++) {

  1091.             memcpy(dest, src, s->cur_frame->uv_w);

  1092.             src += s->cur_frame->uv_w;

  1093.             dest += s->frame.linesize[2];

  1094.         }

  1095.     }

  1096. 

  1097.     *data_size=sizeof(AVFrame);

  1098.     *(AVFrame*)data= s->frame;

  1099. 

  1100.     return buf_size;

  1101. }

  1102. 

  1103. static av_cold int indeo3_decode_end(AVCodecContext *avctx)

  1104. {

  1105.     Indeo3DecodeContext *s = avctx->priv_data;

  1106. 

  1107.     iv_free_func(s);

  1108. 

  1109.     return 0;

  1110. }

  1111. 

  1112. AVCodec indeo3_decoder = {

  1113.     "indeo3",

  1114.     CODEC_TYPE_VIDEO,

  1115.     CODEC_ID_INDEO3,

  1116.     sizeof(Indeo3DecodeContext),

  1117.     indeo3_decode_init,

  1118.     NULL,

  1119.     indeo3_decode_end,

  1120.     indeo3_decode_frame,

  1121.     0,

  1122.     NULL,

  1123.     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),

  1124. };