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FFmpeg/libavcodec/rv10.c

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  1. /*

  2.  * RV10 codec

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file libavcodec/rv10.c

  25.  * RV10 codec.

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "dsputil.h"

  30. #include "mpegvideo.h"

  31. 

  32. //#define DEBUG

  33. 

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

  35. 

  36. static const uint16_t rv_lum_code[256] =

  37. {

  38.  0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,

  39.  0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,

  40.  0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,

  41.  0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,

  42.  0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,

  43.  0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,

  44.  0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,

  45.  0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,

  46.  0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,

  47.  0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,

  48.  0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,

  49.  0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,

  50.  0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,

  51.  0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,

  52.  0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,

  53.  0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,

  54.  0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,

  55.  0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,

  56.  0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,

  57.  0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,

  58.  0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,

  59.  0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,

  60.  0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,

  61.  0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,

  62.  0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,

  63.  0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,

  64.  0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,

  65.  0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,

  66.  0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,

  67.  0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,

  68.  0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,

  69.  0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,

  70. };

  71. 

  72. static const uint8_t rv_lum_bits[256] =

  73. {

  74.  14, 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, 12, 12, 12, 12, 12, 12, 12,

  81.  12, 12, 12, 12, 12, 12, 12, 12,

  82.  12, 10, 10, 10, 10, 10, 10, 10,

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

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

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

  86.  10,  8,  8,  8,  8,  8,  8,  8,

  87.   8,  8,  8,  8,  8,  8,  8,  8,

  88.   8,  7,  7,  7,  7,  7,  7,  7,

  89.   7,  6,  6,  6,  6,  5,  5,  4,

  90.   2,  4,  5,  5,  6,  6,  6,  6,

  91.   7,  7,  7,  7,  7,  7,  7,  7,

  92.   8,  8,  8,  8,  8,  8,  8,  8,

  93.   8,  8,  8,  8,  8,  8,  8,  8,

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

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

  96.  10, 10, 10, 10, 10, 10, 10, 10,

  97.  10, 10, 10, 10, 10, 10, 10, 10,

  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.  12, 12, 12, 12, 12, 12, 12, 12,

  105.  12, 12, 12, 12, 12, 12, 12, 12,

  106. };

  107. 

  108. static const uint16_t rv_chrom_code[256] =

  109. {

  110.  0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,

  111.  0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,

  112.  0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,

  113.  0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,

  114.  0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,

  115.  0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,

  116.  0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,

  117.  0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,

  118.  0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,

  119.  0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,

  120.  0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,

  121.  0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,

  122.  0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,

  123.  0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,

  124.  0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,

  125.  0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,

  126.  0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,

  127.  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,

  128.  0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,

  129.  0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,

  130.  0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,

  131.  0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,

  132.  0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,

  133.  0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,

  134.  0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,

  135.  0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,

  136.  0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,

  137.  0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,

  138.  0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,

  139.  0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,

  140.  0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,

  141.  0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,

  142. };

  143. 

  144. static const uint8_t rv_chrom_bits[256] =

  145. {

  146.  16, 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, 14, 14, 14, 14, 14, 14, 14,

  153.  14, 14, 14, 14, 14, 14, 14, 14,

  154.  14, 12, 12, 12, 12, 12, 12, 12,

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

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

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

  158.  12, 10, 10, 10, 10, 10, 10, 10,

  159.  10, 10, 10, 10, 10, 10, 10, 10,

  160.  10,  8,  8,  8,  8,  8,  8,  8,

  161.   8,  6,  6,  6,  6,  4,  4,  3,

  162.   2,  3,  4,  4,  6,  6,  6,  6,

  163.   8,  8,  8,  8,  8,  8,  8,  8,

  164.  10, 10, 10, 10, 10, 10, 10, 10,

  165.  10, 10, 10, 10, 10, 10, 10, 10,

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

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

  168.  12, 12, 12, 12, 12, 12, 12, 12,

  169.  12, 12, 12, 12, 12, 12, 12, 12,

  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.  14, 14, 14, 14, 14, 14, 14, 14,

  177.  14, 14, 14, 14, 14, 14, 14, 14,

  178. };

  179. 

  180. static VLC rv_dc_lum, rv_dc_chrom;

  181. 

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

  183. {

  184.     int code;

  185. 

  186.     if (n < 4) {

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

  188.         if (code < 0) {

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

  190.                necessary. The following code would be completely useless

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

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

  193.             if (code == 0x7c) {

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

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

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

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

  198.                 if (get_bits1(&s->gb) == 0)

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

  200.                 else

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

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

  203.                 skip_bits(&s->gb, 11);

  204.                 code = 1;

  205.             }

  206.         } else {

  207.             code -= 128;

  208.         }

  209.     } else {

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

  211.         /* same remark */

  212.         if (code < 0) {

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

  214.             if (code == 0x1fc) {

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

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

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

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

  219.                 skip_bits(&s->gb, 9);

  220.                 code = 1;

  221.             } else {

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

  223.                 return 0xffff;

  224.             }

  225.         } else {

  226.             code -= 128;

  227.         }

  228.     }

  229.     return -code;

  230. }

  231. 

  232. 

  233. #if CONFIG_RV10_ENCODER || CONFIG_RV20_ENCODER

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

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

  236. {

  237.     int full_frame= 0;

  238. 

  239.     align_put_bits(&s->pb);

  240. 

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

  242. 

  243.     put_bits(&s->pb, 1, (s->pict_type == FF_P_TYPE));

  244. 

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

  246. 

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

  248. 

  249.     if (s->pict_type == FF_I_TYPE) {

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

  251.     }

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

  253.        to display the macroblocks is coded here */

  254.     if(!full_frame){

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

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

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

  258.     }

  259. 

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

  261. }

  262. 

  263. void rv20_encode_picture_header(MpegEncContext *s, int picture_number){

  264.     put_bits(&s->pb, 2, s->pict_type); //I 0 vs. 1 ?

  265.     put_bits(&s->pb, 1, 0);     /* unknown bit */

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

  267. 

  268.     put_sbits(&s->pb, 8, picture_number); //FIXME wrong, but correct is not known

  269.     s->mb_x= s->mb_y= 0;

  270.     ff_h263_encode_mba(s);

  271. 

  272.     put_bits(&s->pb, 1, s->no_rounding);

  273. 

  274.     assert(s->f_code == 1);

  275.     assert(s->unrestricted_mv == 1);

  276. //    assert(s->h263_aic== (s->pict_type == FF_I_TYPE));

  277.     assert(s->alt_inter_vlc == 0);

  278.     assert(s->umvplus == 0);

  279.     assert(s->modified_quant==1);

  280.     assert(s->loop_filter==1);

  281. 

  282.     s->h263_aic= s->pict_type == FF_I_TYPE;

  283.     if(s->h263_aic){

  284.         s->y_dc_scale_table=

  285.         s->c_dc_scale_table= ff_aic_dc_scale_table;

  286.     }else{

  287.         s->y_dc_scale_table=

  288.         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;

  289.     }

  290. }

  291. 

  292. #endif /* CONFIG_RV10_ENCODER || CONFIG_RV20_ENCODER */

  293. 

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

  295. static int rv10_decode_picture_header(MpegEncContext *s)

  296. {

  297.     int mb_count, pb_frame, marker, unk, mb_xy;

  298. 

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

  300.     marker = get_bits1(&s->gb);

  301. 

  302.     if (get_bits1(&s->gb))

  303.         s->pict_type = FF_P_TYPE;

  304.     else

  305.         s->pict_type = FF_I_TYPE;

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

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

  308.     pb_frame = get_bits1(&s->gb);

  309. 

  310. #ifdef DEBUG

  311.     av_log(s->avctx, AV_LOG_DEBUG, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);

  312. #endif

  313. 

  314.     if (pb_frame){

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

  316.         return -1;

  317.     }

  318. 

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

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

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

  322.         return -1;

  323.     }

  324. 

  325.     if (s->pict_type == FF_I_TYPE) {

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

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

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

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

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

  331. #ifdef DEBUG

  332.             av_log(s->avctx, AV_LOG_DEBUG, "DC:%d %d %d\n",

  333.                    s->last_dc[0],

  334.                    s->last_dc[1],

  335.                    s->last_dc[2]);

  336. #endif

  337.         }

  338.     }

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

  340.        to display the macroblocks is coded here */

  341. 

  342.     mb_xy= s->mb_x + s->mb_y*s->mb_width;

  343.     if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){

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

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

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

  347.     } else {

  348.         s->mb_x = 0;

  349.         s->mb_y = 0;

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

  351.     }

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

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

  354.     s->f_code = 1;

  355.     s->unrestricted_mv = 1;

  356. 

  357.     return mb_count;

  358. }

  359. 

  360. static int rv20_decode_picture_header(MpegEncContext *s)

  361. {

  362.     int seq, mb_pos, i;

  363. 

  364. #if 0

  365.     GetBitContext gb= s->gb;

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

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

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

  369.     }

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

  371. #endif

  372. #if 0

  373.     av_log(s->avctx, AV_LOG_DEBUG, "%3dx%03d/%02Xx%02X ", s->width, s->height, s->width/4, s->height/4);

  374.     for(i=0; i<s->avctx->extradata_size; i++){

  375.         av_log(s->avctx, AV_LOG_DEBUG, "%02X ", ((uint8_t*)s->avctx->extradata)[i]);

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

  377.     }

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

  379. #endif

  380. 

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

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

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

  384.             return -1;

  385.         }

  386.     }

  387. 

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

  389.     switch(i){

  390.     case 0: s->pict_type= FF_I_TYPE; break;

  391.     case 1: s->pict_type= FF_I_TYPE; break; //hmm ...

  392.     case 2: s->pict_type= FF_P_TYPE; break;

  393.     case 3: s->pict_type= FF_B_TYPE; break;

  394.     default:

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

  396.         return -1;

  397.     }

  398. 

  399.     if(s->last_picture_ptr==NULL && s->pict_type==FF_B_TYPE){

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

  401.         return -1;

  402.     }

  403. 

  404.     if (get_bits1(&s->gb)){

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

  406.         return -1;

  407.     }

  408. 

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

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

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

  412.         return -1;

  413.     }

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

  415.         if (get_bits1(&s->gb)){

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

  417.             return -1;

  418.         }

  419.     }

  420. 

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

  422.         int f, new_w, new_h;

  423.         int v= s->avctx->extradata_size >= 4 ? 7&((uint8_t*)s->avctx->extradata)[1] : 0;

  424. 

  425.         if (get_bits1(&s->gb)){

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

  427. //            return -1;

  428.         }

  429.         seq= get_bits(&s->gb, 13)<<2;

  430. 

  431.         f= get_bits(&s->gb, av_log2(v)+1);

  432. 

  433.         if(f){

  434.             new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];

  435.             new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];

  436.         }else{

  437.             new_w= s->width; //FIXME wrong we of course must save the original in the context

  438.             new_h= s->height;

  439.         }

  440.         if(new_w != s->width || new_h != s->height){

  441.             av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);

  442.             if (avcodec_check_dimensions(s->avctx, new_h, new_w) < 0)

  443.                 return -1;

  444.             MPV_common_end(s);

  445.             s->width  = s->avctx->width = new_w;

  446.             s->height = s->avctx->height= new_h;

  447.             if (MPV_common_init(s) < 0)

  448.                 return -1;

  449.         }

  450. 

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

  452.             av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, v);

  453.         }

  454.     }else{

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

  456.     }

  457. 

  458. //     if(s->avctx->sub_id <= 0x20201002){ //0x20201002 definitely needs this

  459.     mb_pos= ff_h263_decode_mba(s);

  460. /*    }else{

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

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

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

  464.     }*/

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

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

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

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

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

  470.         if(s->pict_type!=FF_B_TYPE){

  471.             s->time= seq;

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

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

  474.         }else{

  475.             s->time= seq;

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

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

  478.                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");

  479.                 return FRAME_SKIPPED;

  480.             }

  481.             ff_mpeg4_init_direct_mv(s);

  482.         }

  483.     }

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

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

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

  487. }

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

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

  490. 

  491.     s->f_code = 1;

  492.     s->unrestricted_mv = 1;

  493.     s->h263_aic= s->pict_type == FF_I_TYPE;

  494. //    s->alt_inter_vlc=1;

  495. //    s->obmc=1;

  496. //    s->umvplus=1;

  497.     s->modified_quant=1;

  498.     if(!s->avctx->lowres)

  499.         s->loop_filter=1;

  500. 

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

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

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

  504.     }

  505. 

  506.     assert(s->pict_type != FF_B_TYPE || !s->low_delay);

  507. 

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

  509. }

  510. 

  511. static av_cold int rv10_decode_init(AVCodecContext *avctx)

  512. {

  513.     MpegEncContext *s = avctx->priv_data;

  514.     static int done=0;

  515. 

  516.     if (avctx->extradata_size < 8) {

  517.         av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");

  518.         return -1;

  519.     }

  520. 

  521.     MPV_decode_defaults(s);

  522. 

  523.     s->avctx= avctx;

  524.     s->out_format = FMT_H263;

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

  526. 

  527.     s->width = avctx->coded_width;

  528.     s->height = avctx->coded_height;

  529. 

  530.     s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;

  531.     avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);

  532. 

  533.     if (avctx->sub_id == 0x10000000) {

  534.         s->rv10_version= 0;

  535.         s->low_delay=1;

  536.     } else if (avctx->sub_id == 0x10001000) {

  537.         s->rv10_version= 3;

  538.         s->low_delay=1;

  539.     } else if (avctx->sub_id == 0x10002000) {

  540.         s->rv10_version= 3;

  541.         s->low_delay=1;

  542.         s->obmc=1;

  543.     } else if (avctx->sub_id == 0x10003000) {

  544.         s->rv10_version= 3;

  545.         s->low_delay=1;

  546.     } else if (avctx->sub_id == 0x10003001) {

  547.         s->rv10_version= 3;

  548.         s->low_delay=1;

  549.     } else if (    avctx->sub_id == 0x20001000

  550.                || (avctx->sub_id >= 0x20100000 && avctx->sub_id < 0x201a0000)) {

  551.         s->low_delay=1;

  552.     } else if (    avctx->sub_id == 0x30202002

  553.                ||  avctx->sub_id == 0x30203002

  554.                || (avctx->sub_id >= 0x20200002 && avctx->sub_id < 0x20300000)) {

  555.         s->low_delay=0;

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

  557.     } else

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

  559. 

  560.     if(avctx->debug & FF_DEBUG_PICT_INFO){

  561.         av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);

  562.     }

  563. 

  564.     avctx->pix_fmt = PIX_FMT_YUV420P;

  565. 

  566.     if (MPV_common_init(s) < 0)

  567.         return -1;

  568. 

  569.     h263_decode_init_vlc(s);

  570. 

  571.     /* init rv vlc */

  572.     if (!done) {

  573.         INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,

  574.                  rv_lum_bits, 1, 1,

  575.                  rv_lum_code, 2, 2, 16384);

  576.         INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,

  577.                  rv_chrom_bits, 1, 1,

  578.                  rv_chrom_code, 2, 2, 16388);

  579.         done = 1;

  580.     }

  581. 

  582.     return 0;

  583. }

  584. 

  585. static av_cold int rv10_decode_end(AVCodecContext *avctx)

  586. {

  587.     MpegEncContext *s = avctx->priv_data;

  588. 

  589.     MPV_common_end(s);

  590.     return 0;

  591. }

  592. 

  593. static int rv10_decode_packet(AVCodecContext *avctx,

  594.                              const uint8_t *buf, int buf_size)

  595. {

  596.     MpegEncContext *s = avctx->priv_data;

  597.     int mb_count, mb_pos, left, start_mb_x;

  598. 

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

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

  601.         mb_count = rv10_decode_picture_header(s);

  602.     else

  603.         mb_count = rv20_decode_picture_header(s);

  604.     if (mb_count < 0) {

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

  606.         return -1;

  607.     }

  608. 

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

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

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

  612.         return -1;

  613.     }

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

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

  616.     if (mb_count > left) {

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

  618.         return -1;

  619.     }

  620. //if(s->pict_type == FF_P_TYPE) return 0;

  621. 

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

  623.         if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?

  624.             ff_er_frame_end(s);

  625.             MPV_frame_end(s);

  626.             s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;

  627.         }

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

  629.             return -1;

  630.         ff_er_frame_start(s);

  631.     }

  632. 

  633. #ifdef DEBUG

  634.     av_log(avctx, AV_LOG_DEBUG, "qscale=%d\n", s->qscale);

  635. #endif

  636. 

  637.     /* default quantization values */

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

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

  640.     }else{

  641.         s->first_slice_line=1;

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

  643.     }

  644.     start_mb_x= s->mb_x;

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

  646.     if(s->h263_aic){

  647.         s->y_dc_scale_table=

  648.         s->c_dc_scale_table= ff_aic_dc_scale_table;

  649.     }else{

  650.         s->y_dc_scale_table=

  651.         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;

  652.     }

  653. 

  654.     if(s->modified_quant)

  655.         s->chroma_qscale_table= ff_h263_chroma_qscale_table;

  656. 

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

  658. 

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

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

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

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

  663.     s->block_wrap[0]=

  664.     s->block_wrap[1]=

  665.     s->block_wrap[2]=

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

  667.     s->block_wrap[4]=

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

  669.     ff_init_block_index(s);

  670.     /* decode each macroblock */

  671. 

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

  673.         int ret;

  674.         ff_update_block_index(s);

  675. #ifdef DEBUG

  676.         av_log(avctx, AV_LOG_DEBUG, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);

  677. #endif

  678. 

  679.         s->mv_dir = MV_DIR_FORWARD;

  680.         s->mv_type = MV_TYPE_16X16;

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

  682. 

  683.         if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {

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

  685.             return -1;

  686.         }

  687.         if(s->pict_type != FF_B_TYPE)

  688.             ff_h263_update_motion_val(s);

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

  690.         if(s->loop_filter)

  691.             ff_h263_loop_filter(s);

  692. 

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

  694.             s->mb_x = 0;

  695.             s->mb_y++;

  696.             ff_init_block_index(s);

  697.         }

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

  699.             s->first_slice_line=0;

  700.         if(ret == SLICE_END) break;

  701.     }

  702. 

  703.     ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);

  704. 

  705.     return buf_size;

  706. }

  707. 

  708. static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)

  709. {

  710.     if(avctx->slice_count) return avctx->slice_offset[n];

  711.     else                   return AV_RL32(buf + n*8);

  712. }

  713. 

  714. static int rv10_decode_frame(AVCodecContext *avctx,

  715.                              void *data, int *data_size,

  716.                              AVPacket *avpkt)

  717. {

  718.     const uint8_t *buf = avpkt->data;

  719.     int buf_size = avpkt->size;

  720.     MpegEncContext *s = avctx->priv_data;

  721.     int i;

  722.     AVFrame *pict = data;

  723.     int slice_count;

  724.     const uint8_t *slices_hdr = NULL;

  725. 

  726. #ifdef DEBUG

  727.     av_log(avctx, AV_LOG_DEBUG, "*****frame %d size=%d\n", avctx->frame_number, buf_size);

  728. #endif

  729. 

  730.     /* no supplementary picture */

  731.     if (buf_size == 0) {

  732.         return 0;

  733.     }

  734. 

  735.     if(!avctx->slice_count){

  736.         slice_count = (*buf++) + 1;

  737.         slices_hdr = buf + 4;

  738.         buf += 8 * slice_count;

  739.     }else

  740.         slice_count = avctx->slice_count;

  741. 

  742.     for(i=0; i<slice_count; i++){

  743.         int offset= get_slice_offset(avctx, slices_hdr, i);

  744.         int size;

  745. 

  746.         if(i+1 == slice_count)

  747.             size= buf_size - offset;

  748.         else

  749.             size= get_slice_offset(avctx, slices_hdr, i+1) - offset;

  750. 

  751.         rv10_decode_packet(avctx, buf+offset, size);

  752.     }

  753. 

  754.     if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){

  755.         ff_er_frame_end(s);

  756.         MPV_frame_end(s);

  757. 

  758.         if (s->pict_type == FF_B_TYPE || s->low_delay) {

  759.             *pict= *(AVFrame*)s->current_picture_ptr;

  760.         } else if (s->last_picture_ptr != NULL) {

  761.             *pict= *(AVFrame*)s->last_picture_ptr;

  762.         }

  763. 

  764.         if(s->last_picture_ptr || s->low_delay){

  765.             *data_size = sizeof(AVFrame);

  766.             ff_print_debug_info(s, pict);

  767.         }

  768.         s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)

  769.     }

  770. 

  771.     return buf_size;

  772. }

  773. 

  774. AVCodec rv10_decoder = {

  775.     "rv10",

  776.     CODEC_TYPE_VIDEO,

  777.     CODEC_ID_RV10,

  778.     sizeof(MpegEncContext),

  779.     rv10_decode_init,

  780.     NULL,

  781.     rv10_decode_end,

  782.     rv10_decode_frame,

  783.     CODEC_CAP_DR1,

  784.     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),

  785.     .pix_fmts= ff_pixfmt_list_420,

  786. };

  787. 

  788. AVCodec rv20_decoder = {

  789.     "rv20",

  790.     CODEC_TYPE_VIDEO,

  791.     CODEC_ID_RV20,

  792.     sizeof(MpegEncContext),

  793.     rv10_decode_init,

  794.     NULL,

  795.     rv10_decode_end,

  796.     rv10_decode_frame,

  797.     CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  798.     .flush= ff_mpeg_flush,

  799.     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),

  800.     .pix_fmts= ff_pixfmt_list_420,

  801. };