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FFmpeg/libavcodec/rv10.c

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  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. 

  20. /**

  21.  * @file rv10.c

  22.  * RV10 codec.

  23.  */

  24.  

  25. #include "avcodec.h"

  26. #include "dsputil.h"

  27. #include "mpegvideo.h"

  28. 

  29. //#define DEBUG

  30. 

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

  32. 

  33. static const uint16_t rv_lum_code[256] =

  34. {

  35.  0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,

  36.  0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,

  37.  0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,

  38.  0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,

  39.  0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,

  40.  0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,

  41.  0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,

  42.  0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,

  43.  0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,

  44.  0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,

  45.  0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,

  46.  0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,

  47.  0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,

  48.  0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,

  49.  0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,

  50.  0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,

  51.  0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,

  52.  0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,

  53.  0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,

  54.  0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,

  55.  0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,

  56.  0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,

  57.  0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,

  58.  0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,

  59.  0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,

  60.  0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,

  61.  0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,

  62.  0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,

  63.  0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,

  64.  0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,

  65.  0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,

  66.  0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,

  67. };

  68. 

  69. static const uint8_t rv_lum_bits[256] = 

  70. {

  71.  14, 12, 12, 12, 12, 12, 12, 12,

  72.  12, 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, 10, 10, 10, 10, 10, 10, 10,

  80.  10, 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,  8,  8,  8,  8,  8,  8,  8,

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

  85.   8,  7,  7,  7,  7,  7,  7,  7,

  86.   7,  6,  6,  6,  6,  5,  5,  4,

  87.   2,  4,  5,  5,  6,  6,  6,  6,

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

  89.   8,  8,  8,  8,  8,  8,  8,  8,

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

  91.  10, 10, 10, 10, 10, 10, 10, 10,

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

  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. };

  104. 

  105. static const uint16_t rv_chrom_code[256] =

  106. {

  107.  0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,

  108.  0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,

  109.  0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,

  110.  0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,

  111.  0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,

  112.  0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,

  113.  0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,

  114.  0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,

  115.  0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,

  116.  0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,

  117.  0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,

  118.  0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,

  119.  0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,

  120.  0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,

  121.  0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,

  122.  0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,

  123.  0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,

  124.  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,

  125.  0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,

  126.  0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,

  127.  0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,

  128.  0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,

  129.  0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,

  130.  0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,

  131.  0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,

  132.  0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,

  133.  0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,

  134.  0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,

  135.  0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,

  136.  0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,

  137.  0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,

  138.  0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,

  139. };

  140. 

  141. static const uint8_t rv_chrom_bits[256] =

  142. {

  143.  16, 14, 14, 14, 14, 14, 14, 14,

  144.  14, 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, 12, 12, 12, 12, 12, 12, 12,

  152.  12, 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, 10, 10, 10, 10, 10, 10, 10,

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

  157.  10,  8,  8,  8,  8,  8,  8,  8,

  158.   8,  6,  6,  6,  6,  4,  4,  3,

  159.   2,  3,  4,  4,  6,  6,  6,  6,

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

  161.  10, 10, 10, 10, 10, 10, 10, 10,

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

  163.  12, 12, 12, 12, 12, 12, 12, 12,

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

  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. };

  176. 

  177. static VLC rv_dc_lum, rv_dc_chrom;

  178. 

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

  180. {

  181.     int code;

  182. 

  183.     if (n < 4) {

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

  185.         if (code < 0) {

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

  187.                necessary. The following code would be completely useless

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

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

  190.             if (code == 0x7c) {

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

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

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

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

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

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

  197.                 else

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

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

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

  201.                 code = 1;

  202.             }

  203.         } else {

  204.             code -= 128;

  205.         }

  206.     } else {

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

  208.         /* same remark */

  209.         if (code < 0) {

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

  211.             if (code == 0x1fc) {

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

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

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

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

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

  217.                 code = 1;

  218.             } else {

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

  220.                 return 0xffff;

  221.             }

  222.         } else {

  223.             code -= 128;

  224.         }

  225.     }

  226.     return -code;

  227. }

  228. 

  229. #ifdef CONFIG_ENCODERS

  230. 

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

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

  233. {

  234.     int full_frame= 0;

  235. 

  236.     align_put_bits(&s->pb);

  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. #endif //CONFIG_ENCODERS

  274. 

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

  276. static int rv10_decode_picture_header(MpegEncContext *s)

  277. {

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

  279.     

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

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

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

  283. 

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

  285.         s->pict_type = P_TYPE;

  286.     else

  287.         s->pict_type = I_TYPE;

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

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

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

  291. 

  292. #ifdef DEBUG

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

  294. #endif

  295.     

  296.     if (pb_frame){

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

  298.         return -1;

  299.     }

  300. 

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

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

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

  304.         return -1;

  305.     }

  306. 

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

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

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

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

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

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

  313. #ifdef DEBUG

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

  315.                    s->last_dc[0],

  316.                    s->last_dc[1],

  317.                    s->last_dc[2]);

  318. #endif

  319.         }

  320.     }

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

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

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

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

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

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

  327.     } else {

  328.         s->mb_x = 0;

  329.         s->mb_y = 0;

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

  331.     }

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

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

  334.     s->f_code = 1;

  335.     s->unrestricted_mv = 1;

  336. 

  337.     return mb_count;

  338. }

  339. 

  340. static int rv20_decode_picture_header(MpegEncContext *s)

  341. {

  342.     int seq, mb_pos, i;

  343. 

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

  345.     switch(i){

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

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

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

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

  350.     default: 

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

  352.         return -1;

  353.     }

  354.     

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

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

  357.         return -1;

  358.     }

  359. 

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

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

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

  363.         return -1;

  364.     }

  365. 

  366.     if(s->avctx->sub_id == 0x20200002)

  367.         seq= get_bits(&s->gb, 16);

  368.     else

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

  370. 

  371.     for(i=0; i<6; i++){

  372.         if(s->mb_width*s->mb_height < ff_mba_max[i]) break;

  373.     }

  374.     mb_pos= get_bits(&s->gb, ff_mba_length[i]);

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

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

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

  378.     

  379.     s->f_code = 1;

  380.     s->unrestricted_mv = 1;

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

  382. //    s->alt_inter_vlc=1;

  383. //    s->obmc=1;

  384. //    s->umvplus=1;

  385. //    s->modified_quant=1;

  386.     

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

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

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

  390.     }

  391. 

  392.     if (s->pict_type == B_TYPE){

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

  394.         return -1;

  395.     }

  396. 

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

  398. }

  399. 

  400. static int rv10_decode_init(AVCodecContext *avctx)

  401. {

  402.     MpegEncContext *s = avctx->priv_data;

  403.     static int done=0;

  404. 

  405.     s->avctx= avctx;

  406.     s->out_format = FMT_H263;

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

  408. 

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

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

  411. 

  412.     switch(avctx->sub_id){

  413.     case 0x10000000:

  414.         s->rv10_version= 0;

  415.         s->h263_long_vectors=0;

  416.         break;

  417.     case 0x10003000:

  418.         s->rv10_version= 3;

  419.         s->h263_long_vectors=1;

  420.         break;

  421.     case 0x10003001:

  422.         s->rv10_version= 3;

  423.         s->h263_long_vectors=0;

  424.         break;

  425.     case 0x20001000:

  426.     case 0x20100001: //ok

  427.     case 0x20200002:

  428.     case 0x20101001: //ok

  429.     default:

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

  431.     }

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

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

  434. 

  435.     if (MPV_common_init(s) < 0)

  436.         return -1;

  437. 

  438.     h263_decode_init_vlc(s);

  439. 

  440.     s->progressive_sequence=1;

  441. 

  442.     /* init rv vlc */

  443.     if (!done) {

  444.         init_vlc(&rv_dc_lum, DC_VLC_BITS, 256, 

  445.                  rv_lum_bits, 1, 1,

  446.                  rv_lum_code, 2, 2);

  447.         init_vlc(&rv_dc_chrom, DC_VLC_BITS, 256, 

  448.                  rv_chrom_bits, 1, 1,

  449.                  rv_chrom_code, 2, 2);

  450.         done = 1;

  451.     }

  452.     

  453.     avctx->pix_fmt = PIX_FMT_YUV420P;

  454. 

  455.     return 0;

  456. }

  457. 

  458. static int rv10_decode_end(AVCodecContext *avctx)

  459. {

  460.     MpegEncContext *s = avctx->priv_data;

  461. 

  462.     MPV_common_end(s);

  463.     return 0;

  464. }

  465. 

  466. static int rv10_decode_packet(AVCodecContext *avctx, 

  467.                              uint8_t *buf, int buf_size)

  468. {

  469.     MpegEncContext *s = avctx->priv_data;

  470.     int i, mb_count, mb_pos, left;

  471. 

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

  473. #if 0

  474.     for(i=0; i<buf_size*8 && i<100; i++)

  475.         printf("%d", get_bits1(&s->gb));

  476.     printf("\n");

  477.     return 0;

  478. #endif

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

  480.         mb_count = rv10_decode_picture_header(s);

  481.     else

  482.         mb_count = rv20_decode_picture_header(s);

  483.     if (mb_count < 0) {

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

  485.         return -1;

  486.     }

  487.     

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

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

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

  491.         return -1;

  492.     }

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

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

  495.     if (mb_count > left) {

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

  497.         return -1;

  498.     }

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

  500. 

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

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

  503.             return -1;

  504.     }

  505. 

  506. #ifdef DEBUG

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

  508. #endif

  509. 

  510.     /* default quantization values */

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

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

  513.     }else{

  514.         s->first_slice_line=1;    

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

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

  517.     }

  518.     if(s->h263_aic){

  519.         s->y_dc_scale_table= 

  520.         s->c_dc_scale_table= ff_aic_dc_scale_table;

  521.     }else{

  522.         s->y_dc_scale_table=

  523.         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;

  524.     }

  525.     s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];

  526.     s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];

  527.     

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

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

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

  531. 

  532.     s->block_wrap[0]=

  533.     s->block_wrap[1]=

  534.     s->block_wrap[2]=

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

  536.     s->block_wrap[4]=

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

  538.     ff_init_block_index(s);

  539.     /* decode each macroblock */

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

  541.         int ret;

  542.         ff_update_block_index(s);

  543. #ifdef DEBUG

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

  545. #endif

  546.         

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

  548.         s->mv_dir = MV_DIR_FORWARD;

  549.         s->mv_type = MV_TYPE_16X16; 

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

  551. 

  552.         if (ret == SLICE_ERROR) {

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

  554.             return -1;

  555.         }

  556.         ff_h263_update_motion_val(s);

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

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

  559.             s->mb_x = 0;

  560.             s->mb_y++;

  561.             ff_init_block_index(s);

  562.         }

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

  564.             s->first_slice_line=0;

  565.         if(ret == SLICE_END) break;

  566.     }

  567. 

  568.     return buf_size;

  569. }

  570. 

  571. static int rv10_decode_frame(AVCodecContext *avctx, 

  572.                              void *data, int *data_size,

  573.                              uint8_t *buf, int buf_size)

  574. {

  575.     MpegEncContext *s = avctx->priv_data;

  576.     int i;

  577.     AVFrame *pict = data; 

  578. 

  579. #ifdef DEBUG

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

  581. #endif

  582. 

  583.     /* no supplementary picture */

  584.     if (buf_size == 0) {

  585.         *data_size = 0;

  586.         return 0;

  587.     }

  588.     

  589.     if(avctx->slice_count){

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

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

  592.             int size;

  593.             

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

  595.                 size= buf_size - offset;

  596.             else

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

  598. 

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

  600.                 return -1;

  601.         }

  602.     }else{

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

  604.             return -1;

  605.     }

  606. 

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

  608.         MPV_frame_end(s);

  609.         

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

  611.     

  612.         *data_size = sizeof(AVFrame);

  613.     }else{

  614.         *data_size = 0;

  615.     }

  616. 

  617.     return buf_size;

  618. }

  619. 

  620. AVCodec rv10_decoder = {

  621.     "rv10",

  622.     CODEC_TYPE_VIDEO,

  623.     CODEC_ID_RV10,

  624.     sizeof(MpegEncContext),

  625.     rv10_decode_init,

  626.     NULL,

  627.     rv10_decode_end,

  628.     rv10_decode_frame,

  629.     CODEC_CAP_DR1

  630. };

  631. 

  632. AVCodec rv20_decoder = {

  633.     "rv20",

  634.     CODEC_TYPE_VIDEO,

  635.     CODEC_ID_RV20,

  636.     sizeof(MpegEncContext),

  637.     rv10_decode_init,

  638.     NULL,

  639.     rv10_decode_end,

  640.     rv10_decode_frame,

  641.     CODEC_CAP_DR1

  642. };