falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1155 Commits
32 Branches
940MB
Tree: d46aba2642
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'd46aba2642'
${ noResults }
FFmpeg/libavcodec/rv10.c

550 lines
18KB
Raw Blame History 

  1. /*

  2.  * RV10 codec

  3.  * Copyright (c) 2000,2001 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

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

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

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

  9.  *

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

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

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

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

  18.  */

  19. #include "avcodec.h"

  20. #include "dsputil.h"

  21. #include "mpegvideo.h"

  22. 

  23. //#define DEBUG

  24. 

  25. #define DC_VLC_BITS 14 //FIXME find a better solution

  26. 

  27. static const UINT16 rv_lum_code[256] =

  28. {

  29.  0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,

  30.  0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,

  31.  0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,

  32.  0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,

  33.  0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,

  34.  0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,

  35.  0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,

  36.  0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,

  37.  0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,

  38.  0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,

  39.  0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,

  40.  0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,

  41.  0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,

  42.  0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,

  43.  0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,

  44.  0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,

  45.  0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,

  46.  0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,

  47.  0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,

  48.  0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,

  49.  0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,

  50.  0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,

  51.  0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,

  52.  0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,

  53.  0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,

  54.  0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,

  55.  0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,

  56.  0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,

  57.  0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,

  58.  0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,

  59.  0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,

  60.  0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,

  61. };

  62. 

  63. static const UINT8 rv_lum_bits[256] = 

  64. {

  65.  14, 12, 12, 12, 12, 12, 12, 12,

  66.  12, 12, 12, 12, 12, 12, 12, 12,

  67.  12, 12, 12, 12, 12, 12, 12, 12,

  68.  12, 12, 12, 12, 12, 12, 12, 12,

  69.  12, 12, 12, 12, 12, 12, 12, 12,

  70.  12, 12, 12, 12, 12, 12, 12, 12,

  71.  12, 12, 12, 12, 12, 12, 12, 12,

  72.  12, 12, 12, 12, 12, 12, 12, 12,

  73.  12, 10, 10, 10, 10, 10, 10, 10,

  74.  10, 10, 10, 10, 10, 10, 10, 10,

  75.  10, 10, 10, 10, 10, 10, 10, 10,

  76.  10, 10, 10, 10, 10, 10, 10, 10,

  77.  10,  8,  8,  8,  8,  8,  8,  8,

  78.   8,  8,  8,  8,  8,  8,  8,  8,

  79.   8,  7,  7,  7,  7,  7,  7,  7,

  80.   7,  6,  6,  6,  6,  5,  5,  4,

  81.   2,  4,  5,  5,  6,  6,  6,  6,

  82.   7,  7,  7,  7,  7,  7,  7,  7,

  83.   8,  8,  8,  8,  8,  8,  8,  8,

  84.   8,  8,  8,  8,  8,  8,  8,  8,

  85.  10, 10, 10, 10, 10, 10, 10, 10,

  86.  10, 10, 10, 10, 10, 10, 10, 10,

  87.  10, 10, 10, 10, 10, 10, 10, 10,

  88.  10, 10, 10, 10, 10, 10, 10, 10,

  89.  12, 12, 12, 12, 12, 12, 12, 12,

  90.  12, 12, 12, 12, 12, 12, 12, 12,

  91.  12, 12, 12, 12, 12, 12, 12, 12,

  92.  12, 12, 12, 12, 12, 12, 12, 12,

  93.  12, 12, 12, 12, 12, 12, 12, 12,

  94.  12, 12, 12, 12, 12, 12, 12, 12,

  95.  12, 12, 12, 12, 12, 12, 12, 12,

  96.  12, 12, 12, 12, 12, 12, 12, 12,

  97. };

  98. 

  99. static const UINT16 rv_chrom_code[256] =

  100. {

  101.  0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,

  102.  0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,

  103.  0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,

  104.  0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,

  105.  0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,

  106.  0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,

  107.  0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,

  108.  0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,

  109.  0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,

  110.  0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,

  111.  0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,

  112.  0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,

  113.  0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,

  114.  0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,

  115.  0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,

  116.  0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,

  117.  0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,

  118.  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,

  119.  0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,

  120.  0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,

  121.  0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,

  122.  0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,

  123.  0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,

  124.  0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,

  125.  0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,

  126.  0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,

  127.  0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,

  128.  0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,

  129.  0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,

  130.  0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,

  131.  0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,

  132.  0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,

  133. };

  134. 

  135. static const UINT8 rv_chrom_bits[256] =

  136. {

  137.  16, 14, 14, 14, 14, 14, 14, 14,

  138.  14, 14, 14, 14, 14, 14, 14, 14,

  139.  14, 14, 14, 14, 14, 14, 14, 14,

  140.  14, 14, 14, 14, 14, 14, 14, 14,

  141.  14, 14, 14, 14, 14, 14, 14, 14,

  142.  14, 14, 14, 14, 14, 14, 14, 14,

  143.  14, 14, 14, 14, 14, 14, 14, 14,

  144.  14, 14, 14, 14, 14, 14, 14, 14,

  145.  14, 12, 12, 12, 12, 12, 12, 12,

  146.  12, 12, 12, 12, 12, 12, 12, 12,

  147.  12, 12, 12, 12, 12, 12, 12, 12,

  148.  12, 12, 12, 12, 12, 12, 12, 12,

  149.  12, 10, 10, 10, 10, 10, 10, 10,

  150.  10, 10, 10, 10, 10, 10, 10, 10,

  151.  10,  8,  8,  8,  8,  8,  8,  8,

  152.   8,  6,  6,  6,  6,  4,  4,  3,

  153.   2,  3,  4,  4,  6,  6,  6,  6,

  154.   8,  8,  8,  8,  8,  8,  8,  8,

  155.  10, 10, 10, 10, 10, 10, 10, 10,

  156.  10, 10, 10, 10, 10, 10, 10, 10,

  157.  12, 12, 12, 12, 12, 12, 12, 12,

  158.  12, 12, 12, 12, 12, 12, 12, 12,

  159.  12, 12, 12, 12, 12, 12, 12, 12,

  160.  12, 12, 12, 12, 12, 12, 12, 12,

  161.  14, 14, 14, 14, 14, 14, 14, 14,

  162.  14, 14, 14, 14, 14, 14, 14, 14,

  163.  14, 14, 14, 14, 14, 14, 14, 14,

  164.  14, 14, 14, 14, 14, 14, 14, 14,

  165.  14, 14, 14, 14, 14, 14, 14, 14,

  166.  14, 14, 14, 14, 14, 14, 14, 14,

  167.  14, 14, 14, 14, 14, 14, 14, 14,

  168.  14, 14, 14, 14, 14, 14, 14, 14,

  169. };

  170. 

  171. static VLC rv_dc_lum, rv_dc_chrom;

  172. 

  173. int rv_decode_dc(MpegEncContext *s, int n)

  174. {

  175.     int code;

  176. 

  177.     if (n < 4) {

  178.         code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);

  179.         if (code < 0) {

  180.             /* XXX: I don't understand why they use LONGER codes than

  181.                necessary. The following code would be completely useless

  182.                if they had thought about it !!! */

  183.             code = get_bits(&s->gb, 7);

  184.             if (code == 0x7c) {

  185.                 code = (INT8)(get_bits(&s->gb, 7) + 1);

  186.             } else if (code == 0x7d) {

  187.                 code = -128 + get_bits(&s->gb, 7);

  188.             } else if (code == 0x7e) {

  189.                 if (get_bits(&s->gb, 1) == 0)

  190.                     code = (INT8)(get_bits(&s->gb, 8) + 1);

  191.                 else

  192.                     code = (INT8)(get_bits(&s->gb, 8));

  193.             } else if (code == 0x7f) {

  194.                 get_bits(&s->gb, 11);

  195.                 code = 1;

  196.             }

  197.         } else {

  198.             code -= 128;

  199.         }

  200.     } else {

  201.         code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);

  202.         /* same remark */

  203.         if (code < 0) {

  204.             code = get_bits(&s->gb, 9);

  205.             if (code == 0x1fc) {

  206.                 code = (INT8)(get_bits(&s->gb, 7) + 1);

  207.             } else if (code == 0x1fd) {

  208.                 code = -128 + get_bits(&s->gb, 7);

  209.             } else if (code == 0x1fe) {

  210.                 get_bits(&s->gb, 9);

  211.                 code = 1;

  212.             } else {

  213.                 fprintf(stderr, "chroma dc error\n");

  214.                 return 0xffff;

  215.             }

  216.         } else {

  217.             code -= 128;

  218.         }

  219.     }

  220.     return -code;

  221. }

  222. 

  223. /* write RV 1.0 compatible frame header */

  224. void rv10_encode_picture_header(MpegEncContext *s, int picture_number)

  225. {

  226.     int full_frame= 1;

  227. 

  228.     align_put_bits(&s->pb);

  229.     

  230.     if(full_frame){

  231.         put_bits(&s->pb, 8, 0xc0);	/* packet header */

  232.         put_bits(&s->pb, 16, 0x4000);	/* len */

  233.         put_bits(&s->pb, 16, 0x4000);	/* pos */

  234.     }

  235. 

  236.     put_bits(&s->pb, 8, picture_number&0xFF);

  237.     

  238.     put_bits(&s->pb, 1, 1);	/* marker */

  239. 

  240.     put_bits(&s->pb, 1, (s->pict_type == P_TYPE));

  241. 

  242.     put_bits(&s->pb, 1, 0);	/* not PB frame */

  243. 

  244.     put_bits(&s->pb, 5, s->qscale);

  245. 

  246.     if (s->pict_type == I_TYPE) {

  247. 	/* specific MPEG like DC coding not used */

  248.     }

  249.     /* if multiple packets per frame are sent, the position at which

  250.        to display the macro blocks is coded here */

  251.     if(!full_frame){

  252.         put_bits(&s->pb, 6, 0);	/* mb_x */

  253.         put_bits(&s->pb, 6, 0);	/* mb_y */

  254.         put_bits(&s->pb, 12, s->mb_width * s->mb_height);

  255.     }

  256. 

  257.     put_bits(&s->pb, 3, 0);	/* ignored */

  258. }

  259. 

  260. static int get_num(GetBitContext *gb)

  261. {

  262.     int n, n1;

  263. 

  264.     n = get_bits(gb, 16);

  265.     if (n >= 0x4000) {

  266.         return n - 0x4000;

  267.     } else {

  268.         n1 = get_bits(gb, 16);

  269.         return (n << 16) | n1;

  270.     }

  271. }

  272. 

  273. /* read RV 1.0 compatible frame header */

  274. static int rv10_decode_picture_header(MpegEncContext *s)

  275. {

  276.     int mb_count, pb_frame, marker, h, full_frame;

  277.     int pic_num, unk;

  278.     

  279.     /* skip packet header */

  280.     h = get_bits(&s->gb, 8);

  281.     if ((h & 0xc0) == 0xc0) {

  282.         int len, pos;

  283.         full_frame = 1;

  284.         len = get_num(&s->gb);

  285.         pos = get_num(&s->gb);

  286. //printf("pos:%d\n",len);

  287.     } else {

  288.         int seq, frame_size, pos;

  289.         full_frame = 0;

  290.         seq = get_bits(&s->gb, 8);

  291.         frame_size = get_num(&s->gb);

  292.         pos = get_num(&s->gb);

  293. //printf("seq:%d, size:%d, pos:%d\n",seq,frame_size,pos);

  294.     }

  295.     /* picture number */

  296.     pic_num= get_bits(&s->gb, 8);

  297. 

  298.     marker = get_bits(&s->gb, 1);

  299. 

  300.     if (get_bits(&s->gb, 1))

  301.         s->pict_type = P_TYPE;

  302.     else

  303.         s->pict_type = I_TYPE;

  304. //printf("h:%d ver:%d\n",h,s->rv10_version);

  305.     if(!marker) printf("marker missing\n");

  306.     pb_frame = get_bits(&s->gb, 1);

  307. 

  308. #ifdef DEBUG

  309.     printf("pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);

  310. #endif

  311.     

  312.     if (pb_frame){

  313.         fprintf(stderr, "pb frame not supported\n");

  314.         return -1;

  315.     }

  316. 

  317.     s->qscale = get_bits(&s->gb, 5);

  318.     if(s->qscale==0){

  319.         fprintf(stderr, "error, qscale:0\n");

  320.         return -1;

  321.     }

  322. 

  323.     if (s->pict_type == I_TYPE) {

  324.         if (s->rv10_version == 3) {

  325.             /* specific MPEG like DC coding not used */

  326.             s->last_dc[0] = get_bits(&s->gb, 8);

  327.             s->last_dc[1] = get_bits(&s->gb, 8);

  328.             s->last_dc[2] = get_bits(&s->gb, 8);

  329. #ifdef DEBUG

  330.             printf("DC:%d %d %d\n",

  331.                    s->last_dc[0],

  332.                    s->last_dc[1],

  333.                    s->last_dc[2]);

  334. #endif

  335.         }

  336.     }

  337.     /* if multiple packets per frame are sent, the position at which

  338.        to display the macro blocks is coded here */

  339.     if (!full_frame) {

  340.         s->mb_x = get_bits(&s->gb, 6);	/* mb_x */

  341.         s->mb_y = get_bits(&s->gb, 6);	/* mb_y */

  342.         mb_count = get_bits(&s->gb, 12);

  343.     } else {

  344.         s->mb_x = 0;

  345.         s->mb_y = 0;

  346.         mb_count = s->mb_width * s->mb_height;

  347.     }

  348.     unk= get_bits(&s->gb, 3);	/* ignored */

  349. //printf("%d\n", unk);

  350.     s->f_code = 1;

  351.     s->unrestricted_mv = 1;

  352. 

  353.     return mb_count;

  354. }

  355. 

  356. static int rv10_decode_init(AVCodecContext *avctx)

  357. {

  358.     MpegEncContext *s = avctx->priv_data;

  359.     static int done;

  360. 

  361.     s->avctx= avctx;

  362.     s->out_format = FMT_H263;

  363. 

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

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

  366. 

  367.     s->h263_rv10 = 1;

  368.     if(avctx->extradata_size >= 8){

  369.         switch(((uint32_t*)avctx->extradata)[1]){

  370.         case 0x10000000:

  371.             s->rv10_version= 0;

  372.             s->h263_long_vectors=0;

  373.             break;

  374.         case 0x10003000:

  375.             s->rv10_version= 3;

  376.             s->h263_long_vectors=1;

  377.             break;

  378.         case 0x10003001:

  379.             s->rv10_version= 3;

  380.             s->h263_long_vectors=0;

  381.             break;

  382.         default:

  383.             fprintf(stderr, "unknown header %X\n", ((uint32_t*)avctx->extradata)[1]);

  384.         }

  385.     }else{

  386.     //  for backward compatibility 

  387.         s->rv10_version= avctx->sub_id;

  388.     }

  389.     

  390.     s->flags= avctx->flags;

  391. 

  392.     if (MPV_common_init(s) < 0)

  393.         return -1;

  394. 

  395.     h263_decode_init_vlc(s);

  396. 

  397.     s->y_dc_scale_table=

  398.     s->c_dc_scale_table= ff_mpeg1_dc_scale_table;

  399. 

  400.     /* init rv vlc */

  401.     if (!done) {

  402.         init_vlc(&rv_dc_lum, DC_VLC_BITS, 256, 

  403.                  rv_lum_bits, 1, 1,

  404.                  rv_lum_code, 2, 2);

  405.         init_vlc(&rv_dc_chrom, DC_VLC_BITS, 256, 

  406.                  rv_chrom_bits, 1, 1,

  407.                  rv_chrom_code, 2, 2);

  408.         done = 1;

  409.     }

  410. 

  411.     return 0;

  412. }

  413. 

  414. static int rv10_decode_end(AVCodecContext *avctx)

  415. {

  416.     MpegEncContext *s = avctx->priv_data;

  417. 

  418.     MPV_common_end(s);

  419.     return 0;

  420. }

  421. 

  422. static int rv10_decode_frame(AVCodecContext *avctx, 

  423.                              void *data, int *data_size,

  424.                              UINT8 *buf, int buf_size)

  425. {

  426.     MpegEncContext *s = avctx->priv_data;

  427.     int i, mb_count, mb_pos, left;

  428.     DCTELEM block[6][64];

  429.     AVPicture *pict = data; 

  430. 

  431. #ifdef DEBUG

  432.     printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);

  433. #endif

  434. 

  435.     /* no supplementary picture */

  436.     if (buf_size == 0) {

  437.         *data_size = 0;

  438.         return 0;

  439.     }

  440. 

  441.     init_get_bits(&s->gb, buf, buf_size);

  442. 

  443.     mb_count = rv10_decode_picture_header(s);

  444.     if (mb_count < 0) {

  445.         fprintf(stderr, "HEADER ERROR\n");

  446.         return -1;

  447.     }

  448.     

  449.     if (s->mb_x >= s->mb_width ||

  450.         s->mb_y >= s->mb_height) {

  451.         fprintf(stderr, "POS ERROR %d %d\n", s->mb_x, s->mb_y);

  452.         return -1;

  453.     }

  454.     mb_pos = s->mb_y * s->mb_width + s->mb_x;

  455.     left = s->mb_width * s->mb_height - mb_pos;

  456.     if (mb_count > left) {

  457.         fprintf(stderr, "COUNT ERROR\n");

  458.         return -1;

  459.     }

  460. 

  461.     if (s->mb_x == 0 && s->mb_y == 0) {

  462.         MPV_frame_start(s, avctx);

  463.     }

  464. 

  465. #ifdef DEBUG

  466.     printf("qscale=%d\n", s->qscale);

  467. #endif

  468. 

  469.     /* default quantization values */

  470.     s->y_dc_scale = 8;

  471.     s->c_dc_scale = 8;

  472.     s->rv10_first_dc_coded[0] = 0;

  473.     s->rv10_first_dc_coded[1] = 0;

  474.     s->rv10_first_dc_coded[2] = 0;

  475. 

  476.     s->block_wrap[0]=

  477.     s->block_wrap[1]=

  478.     s->block_wrap[2]=

  479.     s->block_wrap[3]= s->mb_width*2 + 2;

  480.     s->block_wrap[4]=

  481.     s->block_wrap[5]= s->mb_width + 2;

  482.     s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;

  483.     s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1)     + s->mb_x*2;

  484.     s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;

  485.     s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2)     + s->mb_x*2;

  486.     s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1)                    + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;

  487.     s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;

  488.     /* decode each macroblock */

  489.     for(i=0;i<mb_count;i++) {

  490.         s->block_index[0]+=2;

  491.         s->block_index[1]+=2;

  492.         s->block_index[2]+=2;

  493.         s->block_index[3]+=2;

  494.         s->block_index[4]++;

  495.         s->block_index[5]++;

  496. #ifdef DEBUG

  497.         printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);

  498. #endif

  499.         

  500.         memset(block, 0, sizeof(block));

  501.         s->mv_dir = MV_DIR_FORWARD;

  502.         s->mv_type = MV_TYPE_16X16; 

  503.         if (h263_decode_mb(s, block) < 0) {

  504.             fprintf(stderr, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);

  505.             return -1;

  506.         }

  507.         MPV_decode_mb(s, block);

  508.         if (++s->mb_x == s->mb_width) {

  509.             s->mb_x = 0;

  510.             s->mb_y++;

  511.             s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;

  512.             s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);

  513.             s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;

  514.             s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2);

  515.             s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1)                    + s->block_wrap[0]*(s->mb_height*2 + 2);

  516.             s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);

  517.         }

  518.     }

  519. 

  520.     if (s->mb_x == 0 &&

  521.         s->mb_y == s->mb_height) {

  522.         MPV_frame_end(s);

  523.         

  524.         pict->data[0] = s->current_picture[0];

  525.         pict->data[1] = s->current_picture[1];

  526.         pict->data[2] = s->current_picture[2];

  527.         pict->linesize[0] = s->linesize;

  528.         pict->linesize[1] = s->uvlinesize;

  529.         pict->linesize[2] = s->uvlinesize;

  530.         

  531.         avctx->quality = s->qscale;

  532.         *data_size = sizeof(AVPicture);

  533.     } else {

  534.         *data_size = 0;

  535.     }

  536.     return buf_size;

  537. }

  538. 

  539. AVCodec rv10_decoder = {

  540.     "rv10",

  541.     CODEC_TYPE_VIDEO,

  542.     CODEC_ID_RV10,

  543.     sizeof(MpegEncContext),

  544.     rv10_decode_init,

  545.     NULL,

  546.     rv10_decode_end,

  547.     rv10_decode_frame,

  548.     CODEC_CAP_DR1

  549. };