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

  105. static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)

  106. {

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

  108.       chroma_pixels, i;

  109.   unsigned int bufsize;

  110. 

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

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

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

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

  115.   luma_pixels = luma_width * luma_height;

  116.   chroma_pixels = chroma_width * chroma_height;

  117. 

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

  119.     (chroma_pixels + chroma_width) * 4;

  120. 

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

  122.     return AVERROR(ENOMEM);

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

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

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

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

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

  128. 

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

  130.   i = luma_pixels + luma_width * 2;

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

  132.   i += (luma_pixels + luma_width);

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

  134.   i += (chroma_pixels + chroma_width);

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

  136.   i += (chroma_pixels + chroma_width);

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

  138.   i += (chroma_pixels + chroma_width);

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

  140. 

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

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

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

  144. 

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

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

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

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

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

  150.   }

  151. 

  152.   return 0;

  153. }

  154. 

  155. /* ---------------------------------------------------------------------- */

  156. static av_cold void iv_free_func(Indeo3DecodeContext *s)

  157. {

  158.       av_free(s->buf);

  159.   av_free(s->ModPred);

  160.   av_free(s->corrector_type);

  161. }

  162. 

  163. /* ---------------------------------------------------------------------- */

  164. static unsigned long iv_decode_frame(Indeo3DecodeContext *s,

  165.                                      const uint8_t *buf, int buf_size)

  166. {

  167.   unsigned int hdr_width, hdr_height,

  168.     chroma_width, chroma_height;

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

  170.   const uint8_t *hdr_pos, *buf_pos;

  171. 

  172.   buf_pos = buf;

  173.   buf_pos += 18;

  174. 

  175.   fflags1 = bytestream_get_le16(&buf_pos);

  176.   fflags3 = bytestream_get_le32(&buf_pos);

  177.   fflags2 = *buf_pos++;

  178.   buf_pos += 3;

  179.   hdr_height = bytestream_get_le16(&buf_pos);

  180.   hdr_width  = bytestream_get_le16(&buf_pos);

  181. 

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

  183.       return -1;

  184. 

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

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

  187.   offs1 = bytestream_get_le32(&buf_pos);

  188.   offs2 = bytestream_get_le32(&buf_pos);

  189.   offs3 = bytestream_get_le32(&buf_pos);

  190.   buf_pos += 4;

  191.   hdr_pos = buf_pos;

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

  193. 

  194.   if(fflags1 & 0x200) {

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

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

  197.   } else {

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

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

  200.   }

  201. 

  202.   buf_pos = buf + 16 + offs1;

  203.   offs = bytestream_get_le32(&buf_pos);

  204. 

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

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

  207.     FFMIN(hdr_width, 160));

  208. 

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

  210.   {

  211. 

  212.   buf_pos = buf + 16 + offs2;

  213.   offs = bytestream_get_le32(&buf_pos);

  214. 

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

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

  217.     FFMIN(chroma_width, 40));

  218. 

  219.   buf_pos = buf + 16 + offs3;

  220.   offs = bytestream_get_le32(&buf_pos);

  221. 

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

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

  224.     FFMIN(chroma_width, 40));

  225. 

  226.   }

  227. 

  228.   return 8;

  229. }

  230. 

  231. typedef struct {

  232.   long xpos;

  233.   long ypos;

  234.   long width;

  235.   long height;

  236.   long split_flag;

  237.   long split_direction;

  238.   long usl7;

  239. } ustr_t;

  240. 

  241. /* ---------------------------------------------------------------------- */

  242. 

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

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

  245.     if(rle_v3 != 0)         \

  246.       rle_v3 = 0;           \

  247.     else {                  \

  248.       rle_v3 = 1;           \

  249.       buf1 -= 2;            \

  250.     }                       \

  251.   }                         \

  252.   lp2 = 4;

  253. 

  254. 

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

  256.   if(rle_v3 == 0) {         \

  257.     rle_v2 = *buf1;         \

  258.     rle_v1 = 1;             \

  259.     if(rle_v2 > 32) {       \

  260.       rle_v2 -= 32;         \

  261.       rle_v1 = 0;           \

  262.     }                       \

  263.     rle_v3 = 1;             \

  264.   }                         \

  265.   buf1--;

  266. 

  267. 

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

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

  270.     rle_v3 = 0;           \

  271.   else {                  \

  272.     buf1--;               \

  273.     rle_v3 = 1;           \

  274.   }

  275. 

  276. 

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

  278.   rle_v2--;             \

  279.   if(rle_v2 == 0) {     \

  280.     rle_v3 = 0;         \

  281.     buf1 += 2;          \

  282.   }                     \

  283.   lp2 = 4;

  284. 

  285. static void iv_Decode_Chunk(Indeo3DecodeContext *s,

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

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

  288.   const uint8_t *buf2, int min_width_160)

  289. {

  290.   uint8_t bit_buf;

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

  292.   long *width_tbl, width_tbl_arr[10];

  293.   const signed char *ref_vectors;

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

  295.   uint32_t *cur_lp, *ref_lp;

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

  297.   uint8_t *correction_type_sp[2];

  298.   ustr_t strip_tbl[20], *strip;

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

  300.     rle_v1, rle_v2, rle_v3;

  301.   unsigned short res;

  302. 

  303.   bit_buf = 0;

  304.   ref_vectors = NULL;

  305. 

  306.   width_tbl = width_tbl_arr + 1;

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

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

  309.     width_tbl[j] = i * j;

  310. 

  311.   strip = strip_tbl;

  312. 

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

  314. 

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

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

  317.   strip->height = height;

  318.   strip->split_direction = 0;

  319.   strip->split_flag = 0;

  320.   strip->usl7 = 0;

  321. 

  322.   bit_pos = 0;

  323. 

  324.   rle_v1 = rle_v2 = rle_v3 = 0;

  325. 

  326.   while(strip >= strip_tbl) {

  327.     if(bit_pos <= 0) {

  328.       bit_pos = 8;

  329.       bit_buf = *buf1++;

  330.     }

  331. 

  332.     bit_pos -= 2;

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

  334. 

  335.     if(cmd == 0) {

  336.       strip++;

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

  338.       strip->split_flag = 1;

  339.       strip->split_direction = 0;

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

  341.       continue;

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

  343.       strip++;

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

  345.       strip->split_flag = 1;

  346.       strip->split_direction = 1;

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

  348.       continue;

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

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

  351.         strip->usl7 = 1;

  352.         ref_vectors = NULL;

  353.         continue;

  354.       }

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

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

  357.         strip->usl7 = 1;

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

  359.         buf1++;

  360.         continue;

  361.       }

  362.     }

  363. 

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

  365. 

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

  367.       blks_width += 3;

  368.     blks_width >>= 2;

  369.     blks_height = strip->height;

  370. 

  371.     if(ref_vectors != NULL) {

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

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

  374.     } else

  375.       ref_frm_pos = cur_frm_pos - width_tbl[4];

  376. 

  377.     if(cmd == 2) {

  378.       if(bit_pos <= 0) {

  379.         bit_pos = 8;

  380.         bit_buf = *buf1++;

  381.       }

  382. 

  383.       bit_pos -= 2;

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

  385. 

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

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

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

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

  390.           cur_frm_pos += 4;

  391.           ref_frm_pos += 4;

  392.         }

  393.       } else if(cmd != 1)

  394.         return;

  395.     } else {

  396.       k = *buf1 >> 4;

  397.       j = *buf1 & 0x0f;

  398.       buf1++;

  399.       lv = j + fflags2;

  400. 

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

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

  403.         cp = ref_frm_pos;

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

  405.             int v = *cp >> 1;

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

  407.         }

  408.       }

  409. 

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

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

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

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

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

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

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

  417.       } else {

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

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

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

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

  422.       }

  423. 

  424.       switch(k) {

  425.         case 1:

  426.         case 0:                    /********** CASE 0 **********/

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

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

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

  430.                 k = *buf1++;

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

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

  433. 

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

  435.                   case 0:

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

  437.                     lp2++;

  438.                     break;

  439.                   case 1:

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

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

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

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

  444.                     buf1++;

  445.                     lp2++;

  446.                     break;

  447.                   case 2:

  448.                     if(lp2 == 0) {

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

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

  451.                       lp2 += 2;

  452.                     }

  453.                     break;

  454.                   case 3:

  455.                     if(lp2 < 2) {

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

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

  458.                       lp2 = 3;

  459.                     }

  460.                     break;

  461.                   case 8:

  462.                     if(lp2 == 0) {

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

  464. 

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

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

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

  468.                       }

  469. 

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

  471.                       break;

  472.                     } else {

  473.                       rle_v1 = 1;

  474.                       rle_v2 = *buf1 - 1;

  475.                     }

  476.                   case 5:

  477.                       LP2_CHECK(buf1,rle_v3,lp2)

  478.                   case 4:

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

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

  481.                     lp2 = 4;

  482.                     break;

  483. 

  484.                   case 7:

  485.                     if(rle_v3 != 0)

  486.                       rle_v3 = 0;

  487.                     else {

  488.                       buf1--;

  489.                       rle_v3 = 1;

  490.                     }

  491.                   case 6:

  492.                     if(ref_vectors != NULL) {

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

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

  495.                     }

  496.                     lp2 = 4;

  497.                     break;

  498. 

  499.                   case 9:

  500.                     lv1 = *buf1++;

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

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

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

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

  505.                       cur_lp[j] = lv;

  506. 

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

  508.                     break;

  509.                   default:

  510.                     return;

  511.                 }

  512.               }

  513. 

  514.               cur_frm_pos += 4;

  515.               ref_frm_pos += 4;

  516.             }

  517. 

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

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

  520.           }

  521.           break;

  522. 

  523.         case 4:

  524.         case 3:                    /********** CASE 3 **********/

  525.           if(ref_vectors != NULL)

  526.             return;

  527.           flag1 = 1;

  528. 

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

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

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

  532.                 k = *buf1++;

  533. 

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

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

  536. 

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

  538.                   case 0:

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

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

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

  542.                     else

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

  544.                     lp2++;

  545.                     break;

  546. 

  547.                   case 1:

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

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

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

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

  552. 

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

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

  555.                     else

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

  557.                     buf1++;

  558.                     lp2++;

  559.                     break;

  560. 

  561.                   case 2:

  562.                     if(lp2 == 0) {

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

  564.                         cur_lp[j] = *ref_lp;

  565.                       lp2 += 2;

  566.                     }

  567.                     break;

  568. 

  569.                   case 3:

  570.                     if(lp2 < 2) {

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

  572.                         cur_lp[j] = *ref_lp;

  573.                       lp2 = 3;

  574.                     }

  575.                     break;

  576. 

  577.                   case 6:

  578.                     lp2 = 4;

  579.                     break;

  580. 

  581.                   case 7:

  582.                     if(rle_v3 != 0)

  583.                       rle_v3 = 0;

  584.                     else {

  585.                       buf1--;

  586.                       rle_v3 = 1;

  587.                     }

  588.                     lp2 = 4;

  589.                     break;

  590. 

  591.                   case 8:

  592.                     if(lp2 == 0) {

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

  594. 

  595.                       if(rle_v1 == 1) {

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

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

  598.                       }

  599. 

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

  601.                       break;

  602.                     } else {

  603.                       rle_v2 = (*buf1) - 1;

  604.                       rle_v1 = 1;

  605.                     }

  606.                   case 5:

  607.                       LP2_CHECK(buf1,rle_v3,lp2)

  608.                   case 4:

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

  610.                       cur_lp[j] = *ref_lp;

  611.                     lp2 = 4;

  612.                     break;

  613. 

  614.                   case 9:

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

  616.                     lv1 = *buf1++;

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

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

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

  620. 

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

  622.                       cur_lp[j] = lv;

  623. 

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

  625.                     break;

  626. 

  627.                   default:

  628.                     return;

  629.                 }

  630.               }

  631. 

  632.               cur_frm_pos += 4;

  633.             }

  634. 

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

  636.             flag1 = 0;

  637.           }

  638.           break;

  639. 

  640.         case 10:                    /********** CASE 10 **********/

  641.           if(ref_vectors == NULL) {

  642.             flag1 = 1;

  643. 

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

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

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

  647.                   k = *buf1++;

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

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

  650.                   lv1 = ref_lp[0];

  651.                   lv2 = ref_lp[1];

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

  653. #ifdef WORDS_BIGENDIAN

  654.                     lv1 = lv1 & 0xFF00FF00;

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

  656.                     lv2 = lv2 & 0xFF00FF00;

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

  658. #else

  659.                     lv1 = lv1 & 0x00FF00FF;

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

  661.                     lv2 = lv2 & 0x00FF00FF;

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

  663. #endif

  664.                   }

  665. 

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

  667.                     case 0:

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

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

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

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

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

  673.                       } else {

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

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

  676.                       }

  677.                       lp2++;

  678.                       break;

  679. 

  680.                     case 1:

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

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

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

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

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

  686.                       } else {

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

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

  689.                       }

  690.                       buf1++;

  691.                       lp2++;

  692.                       break;

  693. 

  694.                     case 2:

  695.                       if(lp2 == 0) {

  696.                         if(flag1 != 0) {

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

  698.                             cur_lp[j] = lv1;

  699.                             cur_lp[j+1] = lv2;

  700.                           }

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

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

  703.                         } else {

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

  705.                             cur_lp[j] = lv1;

  706.                             cur_lp[j+1] = lv2;

  707.                           }

  708.                         }

  709.                         lp2 += 2;

  710.                       }

  711.                       break;

  712. 

  713.                     case 3:

  714.                       if(lp2 < 2) {

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

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

  717.                             cur_lp[j] = lv1;

  718.                             cur_lp[j+1] = lv2;

  719.                           }

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

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

  722.                         } else {

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

  724.                             cur_lp[j] = lv1;

  725.                             cur_lp[j+1] = lv2;

  726.                           }

  727.                         }

  728.                         lp2 = 3;

  729.                       }

  730.                       break;

  731. 

  732.                     case 8:

  733.                       if(lp2 == 0) {

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

  735.                         if(rle_v1 == 1) {

  736.                           if(flag1 != 0) {

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

  738.                               cur_lp[j] = lv1;

  739.                               cur_lp[j+1] = lv2;

  740.                             }

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

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

  743.                           } else {

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

  745.                               cur_lp[j] = lv1;

  746.                               cur_lp[j+1] = lv2;

  747.                             }

  748.                           }

  749.                         }

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

  751.                         break;

  752.                       } else {

  753.                         rle_v1 = 1;

  754.                         rle_v2 = (*buf1) - 1;

  755.                       }

  756.                     case 5:

  757.                         LP2_CHECK(buf1,rle_v3,lp2)

  758.                     case 4:

  759.                       if(lp2 == 0 && 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 - (lp2 * 2); i++, j += width_tbl[1]) {

  768.                           cur_lp[j] = lv1;

  769.                           cur_lp[j+1] = lv2;

  770.                         }

  771.                       }

  772.                       lp2 = 4;

  773.                       break;

  774. 

  775.                     case 6:

  776.                       lp2 = 4;

  777.                       break;

  778. 

  779.                     case 7:

  780.                       if(lp2 == 0) {

  781.                         if(rle_v3 != 0)

  782.                           rle_v3 = 0;

  783.                         else {

  784.                           buf1--;

  785.                           rle_v3 = 1;

  786.                         }

  787.                         lp2 = 4;

  788.                       }

  789.                       break;

  790. 

  791.                     case 9:

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

  793.                       lv1 = *buf1;

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

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

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

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

  798.                         cur_lp[j] = lv;

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

  800.                       break;

  801. 

  802.                     default:

  803.                       return;

  804.                   }

  805.                 }

  806. 

  807.                 cur_frm_pos += 8;

  808.               }

  809. 

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

  811.               flag1 = 0;

  812.             }

  813.           } else {

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

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

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

  817.                   k = *buf1++;

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

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

  820. 

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

  822.                     case 0:

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

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

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

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

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

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

  829.                       lp2++;

  830.                       break;

  831. 

  832.                     case 1:

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

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

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

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

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

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

  839.                       lp2++;

  840.                       break;

  841. 

  842.                     case 2:

  843.                       if(lp2 == 0) {

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

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

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

  847.                         }

  848.                         lp2 += 2;

  849.                       }

  850.                       break;

  851. 

  852.                     case 3:

  853.                       if(lp2 < 2) {

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

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

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

  857.                         }

  858.                         lp2 = 3;

  859.                       }

  860.                       break;

  861. 

  862.                     case 8:

  863.                       if(lp2 == 0) {

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

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

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

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

  868.                         }

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

  870.                         break;

  871.                       } else {

  872.                         rle_v1 = 1;

  873.                         rle_v2 = (*buf1) - 1;

  874.                       }

  875.                     case 5:

  876.                     case 7:

  877.                         LP2_CHECK(buf1,rle_v3,lp2)

  878.                     case 6:

  879.                     case 4:

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

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

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

  883.                       }

  884.                       lp2 = 4;

  885.                       break;

  886. 

  887.                     case 9:

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

  889.                       lv1 = *buf1;

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

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

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

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

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

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

  896.                       break;

  897. 

  898.                     default:

  899.                       return;

  900.                   }

  901.                 }

  902. 

  903.                 cur_frm_pos += 8;

  904.                 ref_frm_pos += 8;

  905.               }

  906. 

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

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

  909.             }

  910.           }

  911.           break;

  912. 

  913.         case 11:                    /********** CASE 11 **********/

  914.           if(ref_vectors == NULL)

  915.             return;

  916. 

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

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

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

  920.                 k = *buf1++;

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

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

  923. 

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

  925.                   case 0:

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

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

  928.                     lp2++;

  929.                     break;

  930. 

  931.                   case 1:

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

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

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

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

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

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

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

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

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

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

  942.                     lp2++;

  943.                     break;

  944. 

  945.                   case 2:

  946.                     if(lp2 == 0) {

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

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

  949.                       lp2 += 2;

  950.                     }

  951.                     break;

  952. 

  953.                   case 3:

  954.                     if(lp2 < 2) {

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

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

  957.                       lp2 = 3;

  958.                     }

  959.                     break;

  960. 

  961.                   case 8:

  962.                     if(lp2 == 0) {

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

  964. 

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

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

  967. 

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

  969.                       break;

  970.                     } else {

  971.                       rle_v1 = 1;

  972.                       rle_v2 = (*buf1) - 1;

  973.                     }

  974.                   case 5:

  975.                   case 7:

  976.                       LP2_CHECK(buf1,rle_v3,lp2)

  977.                   case 4:

  978.                   case 6:

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

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

  981.                     lp2 = 4;

  982.                     break;

  983. 

  984.                 case 9:

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

  986.                   lv1 = *buf1++;

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

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

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

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

  991.                     cur_lp[j] = lv;

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

  993.                   break;

  994. 

  995.                   default:

  996.                     return;

  997.                 }

  998.               }

  999. 

  1000.               cur_frm_pos += 4;

  1001.               ref_frm_pos += 4;

  1002.             }

  1003. 

  1004.             cur_frm_pos += (((width * 2) - blks_width) * 4);

  1005.             ref_frm_pos += (((width * 2) - blks_width) * 4);

  1006.           }

  1007.           break;

  1008. 

  1009.         default:

  1010.           return;

  1011.       }

  1012.     }

  1013. 

  1014.     if(strip < strip_tbl)

  1015.       return;

  1016. 

  1017.     for( ; strip >= strip_tbl; strip--) {

  1018.       if(strip->split_flag != 0) {

  1019.         strip->split_flag = 0;

  1020.         strip->usl7 = (strip-1)->usl7;

  1021. 

  1022.         if(strip->split_direction) {

  1023.           strip->xpos += strip->width;

  1024.           strip->width = (strip-1)->width - strip->width;

  1025.           if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)

  1026.             strip->width = width - strip->xpos;

  1027.         } else {

  1028.           strip->ypos += strip->height;

  1029.           strip->height = (strip-1)->height - strip->height;

  1030.         }

  1031.         break;

  1032.       }

  1033.     }

  1034.   }

  1035. }

  1036. 

  1037. static av_cold int indeo3_decode_init(AVCodecContext *avctx)

  1038. {

  1039.     Indeo3DecodeContext *s = avctx->priv_data;

  1040.     int ret = 0;

  1041. 

  1042.     s->avctx = avctx;

  1043.     s->width = avctx->width;

  1044.     s->height = avctx->height;

  1045.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1046. 

  1047.     if (!(ret = build_modpred(s)))

  1048.       ret = iv_alloc_frames(s);

  1049.     if (ret)

  1050.       iv_free_func(s);

  1051. 

  1052.     return ret;

  1053. }

  1054. 

  1055. static int indeo3_decode_frame(AVCodecContext *avctx,

  1056.                                void *data, int *data_size,

  1057.                                const uint8_t *buf, int buf_size)

  1058. {

  1059.     Indeo3DecodeContext *s=avctx->priv_data;

  1060.     uint8_t *src, *dest;

  1061.     int y;

  1062. 

  1063.     iv_decode_frame(s, buf, buf_size);

  1064. 

  1065.     if(s->frame.data[0])

  1066.         avctx->release_buffer(avctx, &s->frame);

  1067. 

  1068.     s->frame.reference = 0;

  1069.     if(avctx->get_buffer(avctx, &s->frame) < 0) {

  1070.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1071.         return -1;

  1072.     }

  1073. 

  1074.     src = s->cur_frame->Ybuf;

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

  1076.     for (y = 0; y < s->height; y++) {

  1077.       memcpy(dest, src, s->cur_frame->y_w);

  1078.       src += s->cur_frame->y_w;

  1079.       dest += s->frame.linesize[0];

  1080.     }

  1081. 

  1082.     if (!(s->avctx->flags & CODEC_FLAG_GRAY))

  1083.     {

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

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

  1086.     for (y = 0; y < s->height / 4; y++) {

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

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

  1089.       dest += s->frame.linesize[1];

  1090.     }

  1091. 

  1092.     src = s->cur_frame->Vbuf;

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

  1094.     for (y = 0; y < s->height / 4; y++) {

  1095.       memcpy(dest, src, s->cur_frame->uv_w);

  1096.       src += s->cur_frame->uv_w;

  1097.       dest += s->frame.linesize[2];

  1098.     }

  1099.     }

  1100. 

  1101.     *data_size=sizeof(AVFrame);

  1102.     *(AVFrame*)data= s->frame;

  1103. 

  1104.     return buf_size;

  1105. }

  1106. 

  1107. static av_cold int indeo3_decode_end(AVCodecContext *avctx)

  1108. {

  1109.     Indeo3DecodeContext *s = avctx->priv_data;

  1110. 

  1111.     iv_free_func(s);

  1112. 

  1113.     return 0;

  1114. }

  1115. 

  1116. AVCodec indeo3_decoder = {

  1117.     "indeo3",

  1118.     CODEC_TYPE_VIDEO,

  1119.     CODEC_ID_INDEO3,

  1120.     sizeof(Indeo3DecodeContext),

  1121.     indeo3_decode_init,

  1122.     NULL,

  1123.     indeo3_decode_end,

  1124.     indeo3_decode_frame,

  1125.     0,

  1126.     NULL,

  1127.     .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),

  1128. };