2 |
#define _VLC_CODES_H_ |
#define _VLC_CODES_H_ |
3 |
|
|
4 |
#include "../portab.h" |
#include "../portab.h" |
5 |
|
#include "mbcoding.h" |
6 |
|
|
7 |
#define VLC_ERROR (-1) |
#define VLC_ERROR (-1) |
8 |
|
#define ESCAPE 7167 |
9 |
|
|
10 |
typedef struct |
typedef struct |
11 |
{ |
{ |
13 |
int8_t len; |
int8_t len; |
14 |
} VLC; |
} VLC; |
15 |
|
|
16 |
|
static VLC *DCT3D[2]; |
17 |
|
|
18 |
|
|
19 |
/****************************************************************** |
/****************************************************************** |
20 |
/* common tables between encoder/decoder * |
* common tables between encoder/decoder * |
21 |
/******************************************************************/ |
******************************************************************/ |
22 |
|
|
23 |
/* constants taken from momusys/vm_common/inlcude/max_level.h */ |
/* constants taken from momusys/vm_common/inlcude/max_level.h */ |
24 |
static char max_level[4][64] = { |
static char max_level[4][64] = { |
211 |
|
|
212 |
|
|
213 |
/****************************************************************** |
/****************************************************************** |
214 |
/* encoder tables * |
* encoder tables * |
215 |
/******************************************************************/ |
******************************************************************/ |
216 |
|
|
217 |
/* DCT coefficients. Four tables, two for last = 0, two for last = 1. |
/* DCT coefficients. Four tables, two for last = 0, two for last = 1. |
218 |
the sign bit must be added afterwards. */ |
the sign bit must be added afterwards. */ |
347 |
/* rest of coeffs for last = 1. indexing by [run-2] */ |
/* rest of coeffs for last = 1. indexing by [run-2] */ |
348 |
|
|
349 |
static VLC coeff_tab3[40][1] = { |
static VLC coeff_tab3[40][1] = { |
350 |
{0x0e, 6}, {0x0d, 6}, {0x0c, 6}, |
{{0x0e, 6}}, {{0x0d, 6}}, {{0x0c, 6}}, |
351 |
{0x13, 7}, {0x12, 7}, {0x11, 7}, {0x10, 7}, |
{{0x13, 7}}, {{0x12, 7}}, {{0x11, 7}}, {{0x10, 7}}, |
352 |
{0x1a, 8}, {0x19, 8}, {0x18, 8}, {0x17, 8}, |
{{0x1a, 8}}, {{0x19, 8}}, {{0x18, 8}}, {{0x17, 8}}, |
353 |
{0x16, 8}, {0x15, 8}, {0x14, 8}, {0x13, 8}, |
{{0x16, 8}}, {{0x15, 8}}, {{0x14, 8}}, {{0x13, 8}}, |
354 |
{0x18, 9}, {0x17, 9}, {0x16, 9}, {0x15, 9}, |
{{0x18, 9}}, {{0x17, 9}}, {{0x16, 9}}, {{0x15, 9}}, |
355 |
{0x14, 9}, {0x13, 9}, {0x12, 9}, {0x11, 9}, |
{{0x14, 9}}, {{0x13, 9}}, {{0x12, 9}}, {{0x11, 9}}, |
356 |
{0x07, 10}, {0x06, 10}, {0x05, 10}, {0x04, 10}, |
{{0x07, 10}}, {{0x06, 10}}, {{0x05, 10}}, {{0x04, 10}}, |
357 |
{0x24, 11}, {0x25, 11}, {0x26, 11}, {0x27, 11}, |
{{0x24, 11}}, {{0x25, 11}}, {{0x26, 11}}, {{0x27, 11}}, |
358 |
{0x58, 12}, {0x59, 12}, {0x5a, 12}, {0x5b, 12}, |
{{0x58, 12}}, {{0x59, 12}}, {{0x5a, 12}}, {{0x5b, 12}}, |
359 |
{0x5c, 12}, {0x5d, 12}, {0x5e, 12}, {0x5f, 12}, |
{{0x5c, 12}}, {{0x5d, 12}}, {{0x5e, 12}}, {{0x5f, 12}}, |
360 |
{0x00, 0} |
{{0x00, 0}} |
361 |
}; |
}; |
362 |
|
|
363 |
/* New tables for Intra luminance coefficients. Same codewords, |
/* New tables for Intra luminance coefficients. Same codewords, |
450 |
/* Coeffs for last = 0, run = 10 -> 14. Indexed by [run-10] */ |
/* Coeffs for last = 0, run = 10 -> 14. Indexed by [run-10] */ |
451 |
|
|
452 |
static VLC coeff_tab7[5][1] = { |
static VLC coeff_tab7[5][1] = { |
453 |
{0x17, 8}, {0x19, 9}, {0x18, 9}, {0x07, 10}, |
{{0x17, 8}}, {{0x19, 9}}, {{0x18, 9}}, {{0x07, 10}}, |
454 |
{0x58, 12} |
{{0x58, 12}} |
455 |
}; |
}; |
456 |
|
|
457 |
/* Coeffs for last = 1, run = 0. Indexed by [level-1] */ |
/* Coeffs for last = 1, run = 0. Indexed by [level-1] */ |
505 |
/* Coeffs for last = 1, run = 7 -> 20. Indexed by [run-7] */ |
/* Coeffs for last = 1, run = 7 -> 20. Indexed by [run-7] */ |
506 |
|
|
507 |
static VLC coeff_tab10[14][1] = { |
static VLC coeff_tab10[14][1] = { |
508 |
{0x14, 8}, {0x13, 8}, {0x1a, 8}, {0x15, 9}, |
{{0x14, 8}}, {{0x13, 8}}, {{0x1a, 8}}, {{0x15, 9}}, |
509 |
{0x14, 9}, {0x13, 9}, {0x12, 9}, {0x11, 9}, |
{{0x14, 9}}, {{0x13, 9}}, {{0x12, 9}}, {{0x11, 9}}, |
510 |
{0x26, 11}, {0x27, 11}, {0x5c, 12}, {0x5d, 12}, |
{{0x26, 11}}, {{0x27, 11}}, {{0x5c, 12}}, {{0x5d, 12}}, |
511 |
{0x5e, 12}, {0x5f, 12} |
{{0x5e, 12}}, {{0x5f, 12}} |
512 |
}; |
}; |
513 |
|
|
514 |
|
|
636 |
coeff_inter_last1, |
coeff_inter_last1, |
637 |
}; |
}; |
638 |
|
|
639 |
static const VLC mcbpc_I[4] = { |
/* MCBPC Indexing by cbpc in first two bits, mode in last two. |
640 |
{1, 1}, {1, 3}, {2, 3}, {3, 3} |
CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10. |
641 |
}; |
Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */ |
642 |
|
|
643 |
static const VLC mcbpc_P_intra[4] = { |
static VLC mcbpc_intra_tab[15] = { |
644 |
{3, 5}, {4, 8}, {3, 8}, {3, 7} |
{0x01, 9}, {0x01, 1}, {0x01, 4}, {0x00, 0}, |
645 |
}; |
{0x00, 0}, {0x01, 3}, {0x01, 6}, {0x00, 0}, |
646 |
|
{0x00, 0}, {0x02, 3}, {0x02, 6}, {0x00, 0}, |
647 |
static const VLC mcbpc_P_inter[4] = { |
{0x00, 0}, {0x03, 3}, {0x03, 6} |
648 |
{1, 1}, {3, 4}, {2, 4}, {5, 6} |
}; |
649 |
}; |
|
650 |
|
/* MCBPC inter. |
651 |
static const VLC mcbpc_P_inter4v[4] = { |
Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */ |
652 |
{2, 3}, {5, 7}, {4, 7}, {5, 8} |
|
653 |
|
static VLC mcbpc_inter_tab[29] = { |
654 |
|
{1, 1}, {3, 3}, {2, 3}, {3, 5}, {4, 6}, {1, 9}, {0, 0}, {0, 0}, |
655 |
|
{3, 4}, {7, 7}, {5, 7}, {4, 8}, {4, 9}, {0, 0}, {0, 0}, {0, 0}, |
656 |
|
{2, 4}, {6, 7}, {4, 7}, {3, 8}, {3, 9}, {0, 0}, {0, 0}, {0, 0}, |
657 |
|
{5, 6}, {5, 9}, {5, 8}, {3, 7}, {2, 9} |
658 |
}; |
}; |
659 |
|
|
660 |
static const VLC cbpy_tab[16] = { |
static const VLC cbpy_tab[16] = { |
942 |
{0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11}, |
{0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11}, |
943 |
{0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12}, |
{0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12}, |
944 |
{0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13}, |
{0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13}, |
945 |
{0x04, 13}, |
{0x04, 13} |
946 |
}; |
}; |
947 |
|
|
948 |
|
|
949 |
/****************************************************************** |
/****************************************************************** |
950 |
/* decoder tables * |
* decoder tables * |
951 |
/******************************************************************/ |
******************************************************************/ |
952 |
|
|
953 |
static const VLC mcbpc_intra_table[64] = { |
static const VLC mcbpc_intra_table[64] = { |
954 |
{-1,0}, |
{-1,0}, |
963 |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
964 |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
965 |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
{3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, |
966 |
{3, 1}, |
{3, 1} |
967 |
}; |
}; |
968 |
|
|
969 |
|
|
997 |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
998 |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
999 |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, |
1000 |
{1,3}, {1,3}, {1,3}, {0,1}, |
{1,3}, {1,3}, {1,3}, {0,1} |
1001 |
}; |
}; |
1002 |
|
|
1003 |
static const VLC cbpy_table[64] = |
static const VLC cbpy_table[64] = |
1010 |
{11,4}, {11,4}, {11,4}, {11,4}, {7,4}, {7,4}, {7,4}, {7,4}, |
{11,4}, {11,4}, {11,4}, {11,4}, {7,4}, {7,4}, {7,4}, {7,4}, |
1011 |
{15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, |
{15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, |
1012 |
{15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, |
{15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, |
1013 |
{15, 2}, {15, 2}, |
{15, 2}, {15, 2} |
1014 |
}; |
}; |
1015 |
|
|
1016 |
|
|
1071 |
{17,3}, {17,3}, {17,3}, {17,3}, {17,3}, {17,3}, |
{17,3}, {17,3}, {17,3}, {17,3}, {17,3}, {17,3}, |
1072 |
{33,4}, {33,4}, {33,4}, {33,4}, {33,4}, {33,4}, |
{33,4}, {33,4}, {33,4}, {33,4}, {33,4}, {33,4}, |
1073 |
{33,4}, {33,4}, {2,4}, {2,4},{2,4},{2,4}, |
{33,4}, {33,4}, {2,4}, {2,4},{2,4},{2,4}, |
1074 |
{2,4}, {2,4},{2,4},{2,4}, |
{2,4}, {2,4},{2,4},{2,4} |
1075 |
}; |
}; |
1076 |
|
|
1077 |
|
|
1091 |
{4241,8}, {4241,8}, {4241,8}, {4241,8}, {225,8}, {225,8}, |
{4241,8}, {4241,8}, {4241,8}, {4241,8}, {225,8}, {225,8}, |
1092 |
{225,8}, {225,8}, {209,8}, {209,8}, {209,8}, {209,8}, |
{225,8}, {225,8}, {209,8}, {209,8}, {209,8}, {209,8}, |
1093 |
{34,8}, {34,8}, {34,8}, {34,8}, {19,8}, {19,8}, |
{34,8}, {34,8}, {34,8}, {34,8}, {19,8}, {19,8}, |
1094 |
{19,8}, {19,8}, {5,8}, {5,8}, {5,8}, {5,8}, |
{19,8}, {19,8}, {5,8}, {5,8}, {5,8}, {5,8} |
1095 |
}; |
}; |
1096 |
|
|
1097 |
VLC DCT3Dtab2[] = { |
VLC DCT3Dtab2[] = { |
1115 |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
1116 |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
1117 |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
{7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, {7167,7}, |
1118 |
{7167,7}, }; |
{7167,7} |
1119 |
|
}; |
1120 |
|
|
1121 |
|
|
1122 |
/* New tables for Intra luminance blocks */ |
/* New tables for Intra luminance blocks */ |
1149 |
{0x00101, 4}, {0x00101, 4}, {0x00101, 4}, {0x00101, 4}, |
{0x00101, 4}, {0x00101, 4}, {0x00101, 4}, {0x00101, 4}, |
1150 |
{0x00101, 4}, {0x00101, 4}, {0x00101, 4}, {0x00101, 4}, |
{0x00101, 4}, {0x00101, 4}, {0x00101, 4}, {0x00101, 4}, |
1151 |
{0x00003, 4}, {0x00003, 4}, {0x00003, 4}, {0x00003, 4}, |
{0x00003, 4}, {0x00003, 4}, {0x00003, 4}, {0x00003, 4}, |
1152 |
{0x00003, 4}, {0x00003, 4}, {0x00003, 4}, {0x00003, 4}, |
{0x00003, 4}, {0x00003, 4}, {0x00003, 4}, {0x00003, 4} |
1153 |
}; |
}; |
1154 |
|
|
1155 |
|
|
1177 |
{0x00104, 8}, {0x00104, 8}, {0x00104, 8}, {0x00104, 8}, |
{0x00104, 8}, {0x00104, 8}, {0x00104, 8}, {0x00104, 8}, |
1178 |
{0x0000c, 8}, {0x0000c, 8}, {0x0000c, 8}, {0x0000c, 8}, |
{0x0000c, 8}, {0x0000c, 8}, {0x0000c, 8}, {0x0000c, 8}, |
1179 |
{0x0000b, 8}, {0x0000b, 8}, {0x0000b, 8}, {0x0000b, 8}, |
{0x0000b, 8}, {0x0000b, 8}, {0x0000b, 8}, {0x0000b, 8}, |
1180 |
{0x0000a, 8}, {0x0000a, 8}, {0x0000a, 8}, {0x0000a, 8}, |
{0x0000a, 8}, {0x0000a, 8}, {0x0000a, 8}, {0x0000a, 8} |
1181 |
}; |
}; |
1182 |
|
|
1183 |
VLC DCT3Dtab5[] = { |
VLC DCT3Dtab5[] = { |
1210 |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
1211 |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
1212 |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
1213 |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, |
{0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7}, {0x01bff, 7} |
1214 |
}; |
}; |
1215 |
|
|
1216 |
VLC ERRtab[] = { |
VLC ERRtab[] = { |
1218 |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
1219 |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
1220 |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
1221 |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0}, |
{VLC_ERROR, 0}, {VLC_ERROR, 0}, {VLC_ERROR, 0} |
1222 |
}; |
}; |
1223 |
|
|
1224 |
static const VLC dc_lum_tab[] = { |
static const VLC dc_lum_tab[] = { |
1227 |
{2, 2}, {2, 2}, {1, 2}, {1, 2}, |
{2, 2}, {2, 2}, {1, 2}, {1, 2}, |
1228 |
}; |
}; |
1229 |
|
|
1230 |
|
static __inline int get_coeff(Bitstream * bs, int *run, int *last, |
1231 |
|
int intra, int short_video_header) |
1232 |
|
{ |
1233 |
|
|
1234 |
|
uint32_t mode; |
1235 |
|
const VLC *tab; |
1236 |
|
int32_t level; |
1237 |
|
|
1238 |
|
if(short_video_header) // inter-VLCs will be used for both intra and inter blocks |
1239 |
|
intra = 0; |
1240 |
|
|
1241 |
|
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
1242 |
|
|
1243 |
|
if(tab->code == -1) |
1244 |
|
goto error; |
1245 |
|
|
1246 |
|
BitstreamSkip(bs, tab->len); |
1247 |
|
|
1248 |
|
if(tab->code != ESCAPE) { |
1249 |
|
if(!intra) |
1250 |
|
{ |
1251 |
|
*run = (tab->code >> 4) & 255; |
1252 |
|
level = tab->code & 15; |
1253 |
|
*last = (tab->code >> 12) & 1; |
1254 |
|
} |
1255 |
|
else |
1256 |
|
{ |
1257 |
|
*run = (tab->code >> 8) & 255; |
1258 |
|
level = tab->code & 255; |
1259 |
|
*last = (tab->code >> 16) & 1; |
1260 |
|
} |
1261 |
|
return BitstreamGetBit(bs) ? -level : level; |
1262 |
|
} |
1263 |
|
|
1264 |
|
if(short_video_header) |
1265 |
|
{ |
1266 |
|
// escape mode 4 - H.263 type, only used if short_video_header = 1 |
1267 |
|
*last = BitstreamGetBit(bs); |
1268 |
|
*run = BitstreamGetBits(bs, 6); |
1269 |
|
level = BitstreamGetBits(bs, 8); |
1270 |
|
|
1271 |
|
if (level == 0 || level == 128) |
1272 |
|
DEBUG1("Illegal LEVEL for ESCAPE mode 4:", level); |
1273 |
|
|
1274 |
|
return (level >= 128 ? -(256 - level) : level); |
1275 |
|
} |
1276 |
|
|
1277 |
|
mode = BitstreamShowBits(bs, 2); |
1278 |
|
|
1279 |
|
if(mode < 3) { |
1280 |
|
BitstreamSkip(bs, (mode == 2) ? 2 : 1); |
1281 |
|
|
1282 |
|
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
1283 |
|
if (tab->code == -1) |
1284 |
|
goto error; |
1285 |
|
|
1286 |
|
BitstreamSkip(bs, tab->len); |
1287 |
|
|
1288 |
|
if (!intra) { |
1289 |
|
*run = (tab->code >> 4) & 255; |
1290 |
|
level = tab->code & 15; |
1291 |
|
*last = (tab->code >> 12) & 1; |
1292 |
|
} |
1293 |
|
else |
1294 |
|
{ |
1295 |
|
*run = (tab->code >> 8) & 255; |
1296 |
|
level = tab->code & 255; |
1297 |
|
*last = (tab->code >> 16) & 1; |
1298 |
|
} |
1299 |
|
|
1300 |
|
if(mode < 2) // first escape mode, level is offset |
1301 |
|
level += max_level[*last + (!intra<<1)][*run]; // need to add back the max level |
1302 |
|
else if(mode == 2) // second escape mode, run is offset |
1303 |
|
*run += max_run[*last + (!intra<<1)][level] + 1; |
1304 |
|
|
1305 |
|
return BitstreamGetBit(bs) ? -level : level; |
1306 |
|
} |
1307 |
|
|
1308 |
|
// third escape mode - fixed length codes |
1309 |
|
BitstreamSkip(bs, 2); |
1310 |
|
*last = BitstreamGetBits(bs, 1); |
1311 |
|
*run = BitstreamGetBits(bs, 6); |
1312 |
|
BitstreamSkip(bs, 1); // marker |
1313 |
|
level = BitstreamGetBits(bs, 12); |
1314 |
|
BitstreamSkip(bs, 1); // marker |
1315 |
|
|
1316 |
|
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
1317 |
|
|
1318 |
|
error: |
1319 |
|
*run = VLC_ERROR; |
1320 |
|
return 0; |
1321 |
|
|
1322 |
|
} |
1323 |
|
|
1324 |
#endif /* _VLC_CODES_H */ |
#endif /* _VLC_CODES_H */ |