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.
3964 Commits
32 Branches
836MB
Tree: 35ef76b51c
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '35ef76b51c'
${ noResults }
FFmpeg/libavcodec/rv10.c

720 lines
22KB
Raw Blame History 

  1. /*

  2.  * RV10 codec

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

  4.  * Copyright (c) 2002-2004 Michael Niedermayer

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

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

  19.  */

  20. 

  21. /**

  22.  * @file rv10.c

  23.  * RV10 codec.

  24.  */

  25.  

  26. #include "avcodec.h"

  27. #include "dsputil.h"

  28. #include "mpegvideo.h"

  29. 

  30. //#define DEBUG

  31. 

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

  33. 

  34. static const uint16_t rv_lum_code[256] =

  35. {

  36.  0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,

  37.  0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,

  38.  0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,

  39.  0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,

  40.  0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,

  41.  0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,

  42.  0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,

  43.  0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,

  44.  0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,

  45.  0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,

  46.  0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,

  47.  0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,

  48.  0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,

  49.  0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,

  50.  0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,

  51.  0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,

  52.  0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,

  53.  0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,

  54.  0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,

  55.  0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,

  56.  0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,

  57.  0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,

  58.  0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,

  59.  0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,

  60.  0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,

  61.  0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,

  62.  0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,

  63.  0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,

  64.  0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,

  65.  0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,

  66.  0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,

  67.  0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,

  68. };

  69. 

  70. static const uint8_t rv_lum_bits[256] = 

  71. {

  72.  14, 12, 12, 12, 12, 12, 12, 12,

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

  74.  12, 12, 12, 12, 12, 12, 12, 12,

  75.  12, 12, 12, 12, 12, 12, 12, 12,

  76.  12, 12, 12, 12, 12, 12, 12, 12,

  77.  12, 12, 12, 12, 12, 12, 12, 12,

  78.  12, 12, 12, 12, 12, 12, 12, 12,

  79.  12, 12, 12, 12, 12, 12, 12, 12,

  80.  12, 10, 10, 10, 10, 10, 10, 10,

  81.  10, 10, 10, 10, 10, 10, 10, 10,

  82.  10, 10, 10, 10, 10, 10, 10, 10,

  83.  10, 10, 10, 10, 10, 10, 10, 10,

  84.  10,  8,  8,  8,  8,  8,  8,  8,

  85.   8,  8,  8,  8,  8,  8,  8,  8,

  86.   8,  7,  7,  7,  7,  7,  7,  7,

  87.   7,  6,  6,  6,  6,  5,  5,  4,

  88.   2,  4,  5,  5,  6,  6,  6,  6,

  89.   7,  7,  7,  7,  7,  7,  7,  7,

  90.   8,  8,  8,  8,  8,  8,  8,  8,

  91.   8,  8,  8,  8,  8,  8,  8,  8,

  92.  10, 10, 10, 10, 10, 10, 10, 10,

  93.  10, 10, 10, 10, 10, 10, 10, 10,

  94.  10, 10, 10, 10, 10, 10, 10, 10,

  95.  10, 10, 10, 10, 10, 10, 10, 10,

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

  97.  12, 12, 12, 12, 12, 12, 12, 12,

  98.  12, 12, 12, 12, 12, 12, 12, 12,

  99.  12, 12, 12, 12, 12, 12, 12, 12,

  100.  12, 12, 12, 12, 12, 12, 12, 12,

  101.  12, 12, 12, 12, 12, 12, 12, 12,

  102.  12, 12, 12, 12, 12, 12, 12, 12,

  103.  12, 12, 12, 12, 12, 12, 12, 12,

  104. };

  105. 

  106. static const uint16_t rv_chrom_code[256] =

  107. {

  108.  0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,

  109.  0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,

  110.  0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,

  111.  0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,

  112.  0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,

  113.  0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,

  114.  0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,

  115.  0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,

  116.  0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,

  117.  0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,

  118.  0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,

  119.  0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,

  120.  0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,

  121.  0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,

  122.  0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,

  123.  0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,

  124.  0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,

  125.  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,

  126.  0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,

  127.  0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,

  128.  0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,

  129.  0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,

  130.  0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,

  131.  0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,

  132.  0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,

  133.  0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,

  134.  0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,

  135.  0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,

  136.  0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,

  137.  0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,

  138.  0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,

  139.  0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,

  140. };

  141. 

  142. static const uint8_t rv_chrom_bits[256] =

  143. {

  144.  16, 14, 14, 14, 14, 14, 14, 14,

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

  146.  14, 14, 14, 14, 14, 14, 14, 14,

  147.  14, 14, 14, 14, 14, 14, 14, 14,

  148.  14, 14, 14, 14, 14, 14, 14, 14,

  149.  14, 14, 14, 14, 14, 14, 14, 14,

  150.  14, 14, 14, 14, 14, 14, 14, 14,

  151.  14, 14, 14, 14, 14, 14, 14, 14,

  152.  14, 12, 12, 12, 12, 12, 12, 12,

  153.  12, 12, 12, 12, 12, 12, 12, 12,

  154.  12, 12, 12, 12, 12, 12, 12, 12,

  155.  12, 12, 12, 12, 12, 12, 12, 12,

  156.  12, 10, 10, 10, 10, 10, 10, 10,

  157.  10, 10, 10, 10, 10, 10, 10, 10,

  158.  10,  8,  8,  8,  8,  8,  8,  8,

  159.   8,  6,  6,  6,  6,  4,  4,  3,

  160.   2,  3,  4,  4,  6,  6,  6,  6,

  161.   8,  8,  8,  8,  8,  8,  8,  8,

  162.  10, 10, 10, 10, 10, 10, 10, 10,

  163.  10, 10, 10, 10, 10, 10, 10, 10,

  164.  12, 12, 12, 12, 12, 12, 12, 12,

  165.  12, 12, 12, 12, 12, 12, 12, 12,

  166.  12, 12, 12, 12, 12, 12, 12, 12,

  167.  12, 12, 12, 12, 12, 12, 12, 12,

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

  169.  14, 14, 14, 14, 14, 14, 14, 14,

  170.  14, 14, 14, 14, 14, 14, 14, 14,

  171.  14, 14, 14, 14, 14, 14, 14, 14,

  172.  14, 14, 14, 14, 14, 14, 14, 14,

  173.  14, 14, 14, 14, 14, 14, 14, 14,

  174.  14, 14, 14, 14, 14, 14, 14, 14,

  175.  14, 14, 14, 14, 14, 14, 14, 14,

  176. };

  177. 

  178. static VLC rv_dc_lum, rv_dc_chrom;

  179. 

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

  181. {

  182.     int code;

  183. 

  184.     if (n < 4) {

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

  186.         if (code < 0) {

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

  188.                necessary. The following code would be completely useless

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

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

  191.             if (code == 0x7c) {

  192.                 code = (int8_t)(get_bits(&s->gb, 7) + 1);

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

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

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

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

  197.                     code = (int8_t)(get_bits(&s->gb, 8) + 1);

  198.                 else

  199.                     code = (int8_t)(get_bits(&s->gb, 8));

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

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

  202.                 code = 1;

  203.             }

  204.         } else {

  205.             code -= 128;

  206.         }

  207.     } else {

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

  209.         /* same remark */

  210.         if (code < 0) {

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

  212.             if (code == 0x1fc) {

  213.                 code = (int8_t)(get_bits(&s->gb, 7) + 1);

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

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

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

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

  218.                 code = 1;

  219.             } else {

  220.                 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");

  221.                 return 0xffff;

  222.             }

  223.         } else {

  224.             code -= 128;

  225.         }

  226.     }

  227.     return -code;

  228. }

  229. 

  230. #ifdef CONFIG_ENCODERS

  231. 

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

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

  234. {

  235.     int full_frame= 0;

  236. 

  237.     align_put_bits(&s->pb);

  238.     

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

  240. 

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

  242. 

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

  244. 

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

  246. 

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

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

  249.     }

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

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

  252.     if(!full_frame){

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

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

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

  256.     }

  257. 

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

  259. }

  260. 

  261. static int get_num(GetBitContext *gb)

  262. {

  263.     int n, n1;

  264. 

  265.     n = get_bits(gb, 16);

  266.     if (n >= 0x4000) {

  267.         return n - 0x4000;

  268.     } else {

  269.         n1 = get_bits(gb, 16);

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

  271.     }

  272. }

  273. 

  274. #endif //CONFIG_ENCODERS

  275. 

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

  277. static int rv10_decode_picture_header(MpegEncContext *s)

  278. {

  279.     int mb_count, pb_frame, marker, full_frame, unk;

  280.     

  281.     full_frame= s->avctx->slice_count==1;

  282. //printf("ff:%d\n", full_frame);

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

  284. 

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

  286.         s->pict_type = P_TYPE;

  287.     else

  288.         s->pict_type = I_TYPE;

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

  290.     if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");

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

  292. 

  293. #ifdef DEBUG

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

  295. #endif

  296.     

  297.     if (pb_frame){

  298.         av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");

  299.         return -1;

  300.     }

  301. 

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

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

  304.         av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");

  305.         return -1;

  306.     }

  307. 

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

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

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

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

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

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

  314. #ifdef DEBUG

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

  316.                    s->last_dc[0],

  317.                    s->last_dc[1],

  318.                    s->last_dc[2]);

  319. #endif

  320.         }

  321.     }

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

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

  324.     if ((!full_frame) || show_bits(&s->gb, 12)==0) {

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

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

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

  328.     } else {

  329.         s->mb_x = 0;

  330.         s->mb_y = 0;

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

  332.     }

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

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

  335.     s->f_code = 1;

  336.     s->unrestricted_mv = 1;

  337. 

  338.     return mb_count;

  339. }

  340. 

  341. static int rv20_decode_picture_header(MpegEncContext *s)

  342. {

  343.     int seq, mb_pos, i;

  344.     

  345. #if 0

  346.     GetBitContext gb= s->gb;

  347.     for(i=0; i<64; i++){

  348.         av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&gb));

  349.         if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");

  350.     }

  351.     av_log(s->avctx, AV_LOG_DEBUG, "\n");

  352. #endif

  353.     

  354.     if(s->avctx->sub_id == 0x30202002 || s->avctx->sub_id == 0x30203002){

  355.         if (get_bits(&s->gb, 3)){

  356.             av_log(s->avctx, AV_LOG_ERROR, "unknown triplet set\n");

  357.             return -1;

  358.         } 

  359.     }   

  360. 

  361.     i= get_bits(&s->gb, 2);

  362.     switch(i){

  363.     case 0: s->pict_type= I_TYPE; break;

  364.     case 1: s->pict_type= I_TYPE; break; //hmm ...

  365.     case 2: s->pict_type= P_TYPE; break;

  366.     case 3: s->pict_type= B_TYPE; break;

  367.     default: 

  368.         av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");

  369.         return -1;

  370.     }

  371.     

  372.     if(s->last_picture_ptr==NULL && s->pict_type==B_TYPE){

  373.         av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");

  374.         return -1;

  375.     }

  376.     

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

  378.         av_log(s->avctx, AV_LOG_ERROR, "unknown bit set\n");

  379.         return -1;

  380.     }

  381. 

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

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

  384.         av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");

  385.         return -1;

  386.     }

  387.     if(s->avctx->sub_id == 0x30203002){

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

  389.             av_log(s->avctx, AV_LOG_ERROR, "unknown bit2 set\n");

  390.             return -1;

  391.         }

  392.     }

  393.         

  394.     if(s->avctx->has_b_frames){

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

  396. //            av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");

  397. //            return -1;

  398.         }

  399.         seq= get_bits(&s->gb, 15);

  400.         if (s->avctx->sub_id == 0x20201002 && 0 && get_bits(&s->gb, 1)){

  401.             av_log(s->avctx, AV_LOG_ERROR, "unknown bit4 set\n");

  402. //            return -1;

  403.         }

  404.         mb_pos= get_bits(&s->gb, av_log2(s->mb_num-1)+1);

  405.         s->mb_x= mb_pos % s->mb_width;

  406.         s->mb_y= mb_pos / s->mb_width;

  407.     }else{

  408.         seq= get_bits(&s->gb, 8)*128;

  409.         mb_pos= ff_h263_decode_mba(s);

  410.     }

  411. //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);

  412.     seq |= s->time &~0x7FFF;

  413.     if(seq - s->time >  0x4000) seq -= 0x8000;

  414.     if(seq - s->time < -0x4000) seq += 0x8000;

  415.     if(seq != s->time){  

  416.         if(s->pict_type!=B_TYPE){

  417.             s->time= seq;

  418.             s->pp_time= s->time - s->last_non_b_time;

  419.             s->last_non_b_time= s->time;

  420.         }else{

  421.             s->time= seq;

  422.             s->pb_time= s->pp_time - (s->last_non_b_time - s->time);

  423.             if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){

  424.                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, seeking?, skiping current b frame\n");

  425.                 return FRAME_SKIPED;

  426.             }

  427.         }

  428.     }

  429. //    printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);

  430. /*for(i=0; i<32; i++){

  431.     av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));

  432. }

  433. av_log(s->avctx, AV_LOG_DEBUG, "\n");*/

  434.     s->no_rounding= get_bits1(&s->gb);

  435.     

  436.     s->f_code = 1;

  437.     s->unrestricted_mv = 1;

  438.     s->h263_aic= s->pict_type == I_TYPE;

  439. //    s->alt_inter_vlc=1;

  440. //    s->obmc=1;

  441. //    s->umvplus=1;

  442.     s->modified_quant=1;

  443.     s->loop_filter=1;

  444.     

  445.     if(s->avctx->debug & FF_DEBUG_PICT_INFO){

  446.             av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n", 

  447.                    seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);

  448.     }

  449. 

  450.     assert(s->pict_type != B_TYPE || !s->low_delay);

  451. 

  452.     return s->mb_width*s->mb_height - mb_pos;

  453. }

  454. 

  455. static int rv10_decode_init(AVCodecContext *avctx)

  456. {

  457.     MpegEncContext *s = avctx->priv_data;

  458.     static int done=0;

  459. 

  460.     MPV_decode_defaults(s);

  461.     

  462.     s->avctx= avctx;

  463.     s->out_format = FMT_H263;

  464.     s->codec_id= avctx->codec_id;

  465. 

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

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

  468. 

  469.     switch(avctx->sub_id){

  470.     case 0x10000000:

  471.         s->rv10_version= 0;

  472.         s->h263_long_vectors=0;

  473.         s->low_delay=1;

  474.         break;

  475.     case 0x10002000:

  476.         s->rv10_version= 3;

  477.         s->h263_long_vectors=1;

  478.         s->low_delay=1;

  479.         s->obmc=1;

  480.         break;

  481.     case 0x10003000:

  482.         s->rv10_version= 3;

  483.         s->h263_long_vectors=1;

  484.         s->low_delay=1;

  485.         break;

  486.     case 0x10003001:

  487.         s->rv10_version= 3;

  488.         s->h263_long_vectors=0;

  489.         s->low_delay=1;

  490.         break;

  491.     case 0x20001000:

  492.     case 0x20100001:

  493.     case 0x20101001:

  494.     case 0x20103001:

  495.         s->low_delay=1;

  496.         break;

  497.     case 0x20200002:

  498.     case 0x20201002:

  499.     case 0x30202002:

  500.     case 0x30203002:

  501.         s->low_delay=0;

  502.         s->avctx->has_b_frames=1;

  503.         break;

  504.     default:

  505.         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);

  506.     }

  507. //printf("ver:%X\n", avctx->sub_id);

  508.     if (MPV_common_init(s) < 0)

  509.         return -1;

  510. 

  511.     h263_decode_init_vlc(s);

  512. 

  513.     /* init rv vlc */

  514.     if (!done) {

  515.         init_vlc(&rv_dc_lum, DC_VLC_BITS, 256, 

  516.                  rv_lum_bits, 1, 1,

  517.                  rv_lum_code, 2, 2);

  518.         init_vlc(&rv_dc_chrom, DC_VLC_BITS, 256, 

  519.                  rv_chrom_bits, 1, 1,

  520.                  rv_chrom_code, 2, 2);

  521.         done = 1;

  522.     }

  523.     

  524.     avctx->pix_fmt = PIX_FMT_YUV420P;

  525. 

  526.     return 0;

  527. }

  528. 

  529. static int rv10_decode_end(AVCodecContext *avctx)

  530. {

  531.     MpegEncContext *s = avctx->priv_data;

  532. 

  533.     MPV_common_end(s);

  534.     return 0;

  535. }

  536. 

  537. static int rv10_decode_packet(AVCodecContext *avctx, 

  538.                              uint8_t *buf, int buf_size)

  539. {

  540.     MpegEncContext *s = avctx->priv_data;

  541.     int mb_count, mb_pos, left;

  542. 

  543.     init_get_bits(&s->gb, buf, buf_size*8);

  544.     if(s->codec_id ==CODEC_ID_RV10)

  545.         mb_count = rv10_decode_picture_header(s);

  546.     else

  547.         mb_count = rv20_decode_picture_header(s);

  548.     if (mb_count < 0) {

  549.         av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");

  550.         return -1;

  551.     }

  552.     

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

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

  555.         av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);

  556.         return -1;

  557.     }

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

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

  560.     if (mb_count > left) {

  561.         av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");

  562.         return -1;

  563.     }

  564. //if(s->pict_type == P_TYPE) return 0;

  565. 

  566.     if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {

  567.         if(MPV_frame_start(s, avctx) < 0)

  568.             return -1;

  569.     }

  570. 

  571. #ifdef DEBUG

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

  573. #endif

  574. 

  575.     /* default quantization values */

  576.     if(s->codec_id== CODEC_ID_RV10){

  577.         if(s->mb_y==0) s->first_slice_line=1;

  578.     }else{

  579.         s->first_slice_line=1;    

  580.         s->resync_mb_x= s->mb_x;

  581.         s->resync_mb_y= s->mb_y;

  582.     }

  583.     if(s->h263_aic){

  584.         s->y_dc_scale_table= 

  585.         s->c_dc_scale_table= ff_aic_dc_scale_table;

  586.     }else{

  587.         s->y_dc_scale_table=

  588.         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;

  589.     }

  590. 

  591.     if(s->modified_quant)

  592.         s->chroma_qscale_table= ff_h263_chroma_qscale_table;

  593.         

  594.     ff_set_qscale(s, s->qscale);

  595. 

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

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

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

  599. //printf("%d %X %X\n", s->pict_type, s->current_picture.motion_val[0], s->current_picture.motion_val[1]);

  600.     s->block_wrap[0]=

  601.     s->block_wrap[1]=

  602.     s->block_wrap[2]=

  603.     s->block_wrap[3]= s->b8_stride;

  604.     s->block_wrap[4]=

  605.     s->block_wrap[5]= s->mb_stride;

  606.     ff_init_block_index(s);

  607.     /* decode each macroblock */

  608. 

  609.     for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {

  610.         int ret;

  611.         ff_update_block_index(s);

  612. #ifdef DEBUG

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

  614. #endif

  615. 

  616. 	s->dsp.clear_blocks(s->block[0]);

  617.         s->mv_dir = MV_DIR_FORWARD;

  618.         s->mv_type = MV_TYPE_16X16; 

  619.         ret=ff_h263_decode_mb(s, s->block);

  620. 

  621.         if (ret == SLICE_ERROR) {

  622.             av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);

  623.             return -1;

  624.         }

  625.         if(s->pict_type != B_TYPE)

  626.             ff_h263_update_motion_val(s);

  627.         MPV_decode_mb(s, s->block);

  628.         if(s->loop_filter)

  629.             ff_h263_loop_filter(s);

  630. 

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

  632.             s->mb_x = 0;

  633.             s->mb_y++;

  634.             ff_init_block_index(s);

  635.         }

  636.         if(s->mb_x == s->resync_mb_x)

  637.             s->first_slice_line=0;

  638.         if(ret == SLICE_END) break;

  639.     }

  640. 

  641.     return buf_size;

  642. }

  643. 

  644. static int rv10_decode_frame(AVCodecContext *avctx, 

  645.                              void *data, int *data_size,

  646.                              uint8_t *buf, int buf_size)

  647. {

  648.     MpegEncContext *s = avctx->priv_data;

  649.     int i;

  650.     AVFrame *pict = data; 

  651. 

  652. #ifdef DEBUG

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

  654. #endif

  655. 

  656.     /* no supplementary picture */

  657.     if (buf_size == 0) {

  658.         return 0;

  659.     }

  660. 

  661.     if(avctx->slice_count){

  662.         for(i=0; i<avctx->slice_count; i++){

  663.             int offset= avctx->slice_offset[i];

  664.             int size;

  665.             

  666.             if(i+1 == avctx->slice_count)

  667.                 size= buf_size - offset;

  668.             else

  669.                 size= avctx->slice_offset[i+1] - offset;

  670. 

  671.             if( rv10_decode_packet(avctx, buf+offset, size) < 0 )

  672.                 return -1;

  673.         }

  674.     }else{

  675.         if( rv10_decode_packet(avctx, buf, buf_size) < 0 )

  676.             return -1;

  677.     }

  678.     

  679.     if(s->mb_y>=s->mb_height){

  680.         MPV_frame_end(s);

  681.     

  682.         if(s->pict_type==B_TYPE || s->low_delay){

  683.             *pict= *(AVFrame*)&s->current_picture;

  684.             ff_print_debug_info(s, pict);

  685.         } else {

  686.             *pict= *(AVFrame*)&s->last_picture;

  687.             ff_print_debug_info(s, pict);

  688.         }

  689.         

  690.         *data_size = sizeof(AVFrame);

  691.     }

  692. 

  693.     return buf_size;

  694. }

  695. 

  696. AVCodec rv10_decoder = {

  697.     "rv10",

  698.     CODEC_TYPE_VIDEO,

  699.     CODEC_ID_RV10,

  700.     sizeof(MpegEncContext),

  701.     rv10_decode_init,

  702.     NULL,

  703.     rv10_decode_end,

  704.     rv10_decode_frame,

  705.     CODEC_CAP_DR1

  706. };

  707. 

  708. AVCodec rv20_decoder = {

  709.     "rv20",

  710.     CODEC_TYPE_VIDEO,

  711.     CODEC_ID_RV20,

  712.     sizeof(MpegEncContext),

  713.     rv10_decode_init,

  714.     NULL,

  715.     rv10_decode_end,

  716.     rv10_decode_frame,

  717.     CODEC_CAP_DR1

  718. };