| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
#include <sys/types.h> |
| 6 |
#include <unistd.h> |
| 7 |
#include <sys/mman.h> |
| 8 |
|
| 9 |
#include "../gppport.h" |
| 10 |
|
| 11 |
/* loosely based on the program vbidecode.cc by Ralph Metzler */ |
| 12 |
|
| 13 |
typedef unsigned int UI; |
| 14 |
typedef unsigned char u8; |
| 15 |
typedef U16 u16; |
| 16 |
|
| 17 |
/* calculates odd parity, medium-efficient */ |
| 18 |
static int |
| 19 |
parodd(U32 data) |
| 20 |
{ |
| 21 |
u8 p4[16] = { 0,1,1,0, 1,0,0,1, 1,0,0,1, 0,1,1,0 }; |
| 22 |
int parity = 1; |
| 23 |
|
| 24 |
do { |
| 25 |
parity ^= p4[data & 15]; |
| 26 |
data >>= 4; |
| 27 |
} while (data); |
| 28 |
|
| 29 |
return parity; |
| 30 |
} |
| 31 |
|
| 32 |
static u8 invtab[256] = { |
| 33 |
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, |
| 34 |
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, |
| 35 |
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, |
| 36 |
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, |
| 37 |
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, |
| 38 |
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, |
| 39 |
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, |
| 40 |
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, |
| 41 |
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, |
| 42 |
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, |
| 43 |
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, |
| 44 |
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, |
| 45 |
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, |
| 46 |
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, |
| 47 |
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, |
| 48 |
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, |
| 49 |
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, |
| 50 |
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, |
| 51 |
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, |
| 52 |
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, |
| 53 |
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, |
| 54 |
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, |
| 55 |
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, |
| 56 |
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, |
| 57 |
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, |
| 58 |
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, |
| 59 |
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, |
| 60 |
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, |
| 61 |
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, |
| 62 |
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, |
| 63 |
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, |
| 64 |
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, |
| 65 |
}; |
| 66 |
|
| 67 |
static u8 unhamtab[256] = { |
| 68 |
0x01, 0xff, 0x81, 0x01, 0xff, 0x00, 0x01, 0xff, |
| 69 |
0xff, 0x02, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x07, |
| 70 |
0xff, 0x00, 0x01, 0xff, 0x00, 0x80, 0xff, 0x00, |
| 71 |
0x06, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x03, 0xff, |
| 72 |
0xff, 0x0c, 0x01, 0xff, 0x04, 0xff, 0xff, 0x07, |
| 73 |
0x06, 0xff, 0xff, 0x07, 0xff, 0x07, 0x07, 0x87, |
| 74 |
0x06, 0xff, 0xff, 0x05, 0xff, 0x00, 0x0d, 0xff, |
| 75 |
0x86, 0x06, 0x06, 0xff, 0x06, 0xff, 0xff, 0x07, |
| 76 |
0xff, 0x02, 0x01, 0xff, 0x04, 0xff, 0xff, 0x09, |
| 77 |
0x02, 0x82, 0xff, 0x02, 0xff, 0x02, 0x03, 0xff, |
| 78 |
0x08, 0xff, 0xff, 0x05, 0xff, 0x00, 0x03, 0xff, |
| 79 |
0xff, 0x02, 0x03, 0xff, 0x03, 0xff, 0x83, 0x03, |
| 80 |
0x04, 0xff, 0xff, 0x05, 0x84, 0x04, 0x04, 0xff, |
| 81 |
0xff, 0x02, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x07, |
| 82 |
0xff, 0x05, 0x05, 0x85, 0x04, 0xff, 0xff, 0x05, |
| 83 |
0x06, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x03, 0xff, |
| 84 |
0xff, 0x0c, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x09, |
| 85 |
0x0a, 0xff, 0xff, 0x0b, 0x8a, 0x0a, 0x0a, 0xff, |
| 86 |
0x08, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x0d, 0xff, |
| 87 |
0xff, 0x0b, 0x0b, 0x8b, 0x0a, 0xff, 0xff, 0x0b, |
| 88 |
0x0c, 0x8c, 0xff, 0x0c, 0xff, 0x0c, 0x0d, 0xff, |
| 89 |
0xff, 0x0c, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x07, |
| 90 |
0xff, 0x0c, 0x0d, 0xff, 0x0d, 0xff, 0x8d, 0x0d, |
| 91 |
0x06, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x0d, 0xff, |
| 92 |
0x08, 0xff, 0xff, 0x09, 0xff, 0x09, 0x09, 0x89, |
| 93 |
0xff, 0x02, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x09, |
| 94 |
0x88, 0x08, 0x08, 0xff, 0x08, 0xff, 0xff, 0x09, |
| 95 |
0x08, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x03, 0xff, |
| 96 |
0xff, 0x0c, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x09, |
| 97 |
0x0f, 0xff, 0x8f, 0x0f, 0xff, 0x0e, 0x0f, 0xff, |
| 98 |
0x08, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x0d, 0xff, |
| 99 |
0xff, 0x0e, 0x0f, 0xff, 0x0e, 0x8e, 0xff, 0x0e, |
| 100 |
}; |
| 101 |
|
| 102 |
#define VBI_BPL 2048 |
| 103 |
|
| 104 |
#define FREQ_PAL 35.468950 |
| 105 |
#define FREQ_NTSC 28.636363 |
| 106 |
#define FREQ FREQ_PAL |
| 107 |
|
| 108 |
#define FREQ_VT_PAL 6.9375 |
| 109 |
#define FREQ_VT_NTSC 5.72725 |
| 110 |
#define FREQ_VT FREQ_VT_PAL /* Replace by FREQ_VT_NTSC and pray that it works */ |
| 111 |
/*#define FREQ_VT 6.165*/ /* teletext-like signal on france, 0xe7 instead of 0x27 */ |
| 112 |
#define FREQ_CRYPT 4.5 /* found on premiere */ |
| 113 |
#define FREQ_VPS 2.5 /* probably only pal */ |
| 114 |
#define FREQ_VDAT 2.0 /* videodat */ |
| 115 |
#define FREQ_VC 0.77 /* videocrypt, just ignore */ |
| 116 |
|
| 117 |
#define VBI_VT 0x0001 |
| 118 |
#define VBI_VPS 0x0002 |
| 119 |
#define VBI_VDAT 0x0004 |
| 120 |
#define VBI_VC 0x0008 |
| 121 |
#define VBI_OTHER 0x0010 |
| 122 |
#define VBI_EMPTY 0x8000 |
| 123 |
|
| 124 |
typedef long FP; |
| 125 |
|
| 126 |
#define FP_BITS 16 |
| 127 |
#define FP_0_5 D2FP(0.5) |
| 128 |
|
| 129 |
#define D2FP(d) ((FP)((d) * (1<<FP_BITS) + 0.5)) |
| 130 |
#define I2FP(i) ((FP)(i) << FP_BITS) |
| 131 |
#define FP2I(fp) (((fp) + FP_0_5) >> FP_BITS) |
| 132 |
|
| 133 |
#define VT_COLS 40 |
| 134 |
#define VT_LINES 36 |
| 135 |
|
| 136 |
typedef struct { |
| 137 |
UI types; /* required types */ |
| 138 |
|
| 139 |
int offset; /* signal offset */ |
| 140 |
int did_agc : 1; /* did we already do agc this frame? */ |
| 141 |
|
| 142 |
int y; /* the line number */ |
| 143 |
u8 *line; /* the current line */ |
| 144 |
FP step; /* the bit step */ |
| 145 |
FP pos; /* position */ |
| 146 |
} decoder; |
| 147 |
|
| 148 |
static void |
| 149 |
decoder_init (decoder *dec, UI types) |
| 150 |
{ |
| 151 |
dec->types = types; |
| 152 |
dec->did_agc = 0; |
| 153 |
} |
| 154 |
|
| 155 |
static void |
| 156 |
decoder_scan_start (decoder *dec, UI a, UI b) |
| 157 |
{ |
| 158 |
u8 *p = dec->line + a; |
| 159 |
UI med = 128 - dec->offset; |
| 160 |
do |
| 161 |
{ |
| 162 |
if (*p >= med) |
| 163 |
break; |
| 164 |
} |
| 165 |
while (++p < dec->line + b); |
| 166 |
|
| 167 |
/* find maximum */ |
| 168 |
while (p[1] > p[0]) |
| 169 |
p++; |
| 170 |
|
| 171 |
dec->pos = I2FP (p - dec->line); |
| 172 |
} |
| 173 |
|
| 174 |
|
| 175 |
static u8 |
| 176 |
get_byte (decoder *dec) |
| 177 |
{ |
| 178 |
u8 byte; |
| 179 |
int bit = 8; |
| 180 |
|
| 181 |
/* if the next bit is a one bit, try to re-center the decoder on it */ |
| 182 |
if ((dec->offset + dec->line[FP2I(dec->pos)]) & 0x80) |
| 183 |
{ |
| 184 |
/*if (dec->line[FP2I(dec->pos)] < dec->line[FP2I(dec->pos)+1]) |
| 185 |
dec->pos += I2FP(1);*/ /* why is this casuing checksum errors? */ |
| 186 |
/*if (dec->line[FP2I(dec->pos)] < dec->line[FP2I(dec->pos)-1]) |
| 187 |
dec->pos -= I2FP(1);*/ |
| 188 |
} |
| 189 |
|
| 190 |
byte=0; |
| 191 |
do |
| 192 |
{ |
| 193 |
byte >>= 1; |
| 194 |
byte |= ((dec->offset + dec->line[FP2I(dec->pos)]) & 0x80); |
| 195 |
dec->pos += dec->step; |
| 196 |
} |
| 197 |
while (--bit); |
| 198 |
|
| 199 |
return byte; |
| 200 |
} |
| 201 |
|
| 202 |
/* get shift-encoded byte */ |
| 203 |
static u8 |
| 204 |
get_byte_SE (decoder *dec) |
| 205 |
{ |
| 206 |
u8 byte; |
| 207 |
int bit = 8; |
| 208 |
|
| 209 |
do |
| 210 |
{ |
| 211 |
byte >>= 1; |
| 212 |
byte |= (dec->line[FP2I(dec->pos)] |
| 213 |
> dec->line[FP2I(dec->pos + dec->step/2)]) << 7; |
| 214 |
dec->pos += dec->step; |
| 215 |
} |
| 216 |
while (--bit); |
| 217 |
|
| 218 |
/* if the next bit is a one bit, try to re-center the decoder on it */ |
| 219 |
if (dec->line[FP2I(dec->pos)] > 128-dec->offset) |
| 220 |
{ |
| 221 |
if (dec->line[FP2I(dec->pos)] > dec->line[FP2I(dec->pos)+1]) |
| 222 |
dec->pos += I2FP(1); |
| 223 |
if (dec->line[FP2I(dec->pos)] < dec->line[FP2I(dec->pos)-1]) |
| 224 |
dec->pos -= I2FP(1); |
| 225 |
} |
| 226 |
|
| 227 |
return byte; |
| 228 |
} |
| 229 |
|
| 230 |
static u8 |
| 231 |
unham4(u8 a) |
| 232 |
{ |
| 233 |
return unhamtab[a] & 15; |
| 234 |
} |
| 235 |
|
| 236 |
static u8 |
| 237 |
unham8(u8 a, u8 b) |
| 238 |
{ |
| 239 |
u8 c1 = unhamtab[a]; |
| 240 |
u8 c2 = unhamtab[b]; |
| 241 |
|
| 242 |
if ( (c1|c2) & 0x40) |
| 243 |
/* 2 bit error */; |
| 244 |
|
| 245 |
return (c1 & 15) |
| 246 |
| (c2 << 4); |
| 247 |
} |
| 248 |
|
| 249 |
static u16 unham16(u8 a, u8 b, u8 c) |
| 250 |
{ |
| 251 |
U32 d = (((c << 8) | b) << 8) | c; |
| 252 |
int A = parodd (d & 0x555555); |
| 253 |
int B = parodd (d & 0x666666); |
| 254 |
int C = parodd (d & 0x787878); |
| 255 |
int D = parodd (d & 0x007f80); |
| 256 |
int E = parodd (d & 0x7f8000); |
| 257 |
int F = parodd (d & 0xffffff); |
| 258 |
int bit; |
| 259 |
|
| 260 |
d = (((d >> 16) & 0x7f) << 11) |
| 261 |
| (((d >> 8) & 0x7f) << 4) |
| 262 |
| (((d >> 4) & 0x07) << 1) |
| 263 |
| (((d >> 2) & 0x01) ); |
| 264 |
|
| 265 |
if (A&B&C&D&E) |
| 266 |
return d; |
| 267 |
if (F) |
| 268 |
return -1; /* double bit error */ |
| 269 |
|
| 270 |
/* correct the single bit error */ |
| 271 |
return d ^ (1 << (31 - 16*E + 8*D + 4*C + 2*B + A)); |
| 272 |
} |
| 273 |
|
| 274 |
#define rev(byte) (invtab [(u8)(byte)]) |
| 275 |
|
| 276 |
static SV * |
| 277 |
decode_vps (u8 *data) |
| 278 |
{ |
| 279 |
AV *av = newAV (); |
| 280 |
|
| 281 |
char name = rev (data[3]); |
| 282 |
|
| 283 |
av_push (av, newSViv (VBI_VPS)); |
| 284 |
av_push (av, newSVpvn (&name, 1)); |
| 285 |
av_push (av, newSViv (data[4] & 3)); /* "unknown", "stereo ", "mono ", "dual " */ |
| 286 |
/* ch, day, mon, hour, min */ |
| 287 |
av_push (av, newSViv (data[ 4] <<12 & 0xf000 |
| 288 |
| data[10] & 0x00c0 |
| 289 |
| data[12] <<10 & 0x0c00 |
| 290 |
| data[13] << 2 & 0x0300 |
| 291 |
| data[13] & 0x003f)); |
| 292 |
av_push (av, newSViv (rev (data[10]) >> 1 & 31)); |
| 293 |
av_push (av, newSViv (rev (data[10]) << 3 & 8 | rev (data[11]) >> 5)); |
| 294 |
av_push (av, newSViv (rev (data[11]) & 31)); |
| 295 |
av_push (av, newSViv (rev (data[12]) >> 2)); |
| 296 |
av_push (av, newSViv (rev (data[14]))); |
| 297 |
|
| 298 |
return newRV_noinc ((SV*)av); |
| 299 |
} |
| 300 |
|
| 301 |
static SV * |
| 302 |
decode_vt (u8 *data) |
| 303 |
{ |
| 304 |
AV *av = newAV (); |
| 305 |
u8 mpag = unham8 (data[3], data[4]); |
| 306 |
u8 mag = mpag & 7; |
| 307 |
u8 pack = (mpag & 0xf8) >> 3; |
| 308 |
|
| 309 |
av_push (av, newSViv (VBI_VT)); |
| 310 |
av_push (av, newSViv (mag)); |
| 311 |
av_push (av, newSViv (pack)); |
| 312 |
|
| 313 |
switch (pack) |
| 314 |
{ |
| 315 |
/* ets300-706 */ |
| 316 |
case 0: |
| 317 |
av_push (av, newSVpvn (data+5, 40)); |
| 318 |
av_push (av, newSViv (unham8 (data[5], data[6]) | (mag << 8))); |
| 319 |
av_push (av, newSViv (unham8 (data[7], data[8]) |
| 320 |
| (unham8 (data[9], data[10]) << 8) |
| 321 |
| (unham8 (data[11], data[12]) << 16))); |
| 322 |
break; |
| 323 |
case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9: case 10: |
| 324 |
case 11: case 12: case 13: case 14: case 15: case 16: case 17: case 18: case 19: case 20: |
| 325 |
case 21: case 22: case 23: case 24: case 25: |
| 326 |
av_push (av, newSVpvn (data+5, 40)); |
| 327 |
break; |
| 328 |
case 26: case 27: case 28: case 29: /* enhancement packets */ |
| 329 |
av_push (av, newSViv (unham4 (data[5]))); |
| 330 |
av_push (av, newSViv (unham16 (data[ 6], data[ 7], data[ 8]))); |
| 331 |
av_push (av, newSViv (unham16 (data[ 9], data[10], data[11]))); |
| 332 |
av_push (av, newSViv (unham16 (data[12], data[13], data[14]))); |
| 333 |
av_push (av, newSViv (unham16 (data[15], data[16], data[17]))); |
| 334 |
av_push (av, newSViv (unham16 (data[18], data[19], data[20]))); |
| 335 |
av_push (av, newSViv (unham16 (data[21], data[22], data[23]))); |
| 336 |
av_push (av, newSViv (unham16 (data[24], data[25], data[26]))); |
| 337 |
av_push (av, newSViv (unham16 (data[27], data[28], data[29]))); |
| 338 |
av_push (av, newSViv (unham16 (data[30], data[31], data[32]))); |
| 339 |
av_push (av, newSViv (unham16 (data[33], data[34], data[35]))); |
| 340 |
av_push (av, newSViv (unham16 (data[36], data[37], data[38]))); |
| 341 |
av_push (av, newSViv (unham16 (data[39], data[40], data[41]))); |
| 342 |
av_push (av, newSViv (unham16 (data[42], data[43], data[44]))); |
| 343 |
break; |
| 344 |
/* ets300-706 & ets300-231 */ |
| 345 |
case 30: |
| 346 |
{ |
| 347 |
UI dc = unham4 (data[5]); |
| 348 |
av_push (av, newSViv (dc)); |
| 349 |
if ((dc >> 1) == 0) |
| 350 |
{ |
| 351 |
av_push (av, newSViv (unham8 (data[6], data[7]) | (mag << 8))); |
| 352 |
av_push (av, newSViv (unham8 (data[8], data[9]) |
| 353 |
| unham8 (data[10], data[11]) << 8)); |
| 354 |
av_push (av, newSViv (rev (data[12]) << 8 | rev (data[13]))); |
| 355 |
} |
| 356 |
else if ((dc >> 1) == 8) |
| 357 |
{ |
| 358 |
/* pdc */ |
| 359 |
} |
| 360 |
} |
| 361 |
break; |
| 362 |
case 31: |
| 363 |
{ |
| 364 |
UI ft = unham4 (data[5]); |
| 365 |
UI al = unham4 (data[6]); |
| 366 |
UI i, addr = 0; |
| 367 |
|
| 368 |
/* ets300-708, IDL */ |
| 369 |
/* http://sunsite.cnlab-switch.ch/ftp/mirror/internet-drafts/draft-ietf-ipvbi-tv-signal-00.txt */ |
| 370 |
|
| 371 |
for(i=0; i<al&7; i++) |
| 372 |
addr = addr << 4 | unham4 (data[i+7]); |
| 373 |
|
| 374 |
av_push (av, newSViv (ft)); |
| 375 |
av_push (av, newSViv (addr)); |
| 376 |
break; |
| 377 |
} |
| 378 |
default: |
| 379 |
av_push (av, newSVpvn (data+5, 40)); |
| 380 |
} |
| 381 |
return newRV_noinc ((SV*)av); |
| 382 |
} |
| 383 |
|
| 384 |
static SV * |
| 385 |
decoder_decode_other (decoder *dec) |
| 386 |
{ |
| 387 |
AV *av = newAV (); |
| 388 |
FP pos = dec->pos; |
| 389 |
u8 data[6]; |
| 390 |
|
| 391 |
av_push (av, newSViv (VBI_OTHER)); |
| 392 |
|
| 393 |
dec->step = D2FP (FREQ / FREQ_CRYPT); /* found on premiere */ |
| 394 |
data [0] = get_byte (dec); |
| 395 |
data [1] = get_byte (dec); |
| 396 |
data [2] = get_byte (dec); |
| 397 |
if (data[0] == 0x55 && data[1] == 0xd0 && data[2] == 0x18) |
| 398 |
{ |
| 399 |
/* premiere */ |
| 400 |
av_push (av, newSViv (1)); |
| 401 |
} |
| 402 |
else |
| 403 |
av_push (av, newSViv (0)); |
| 404 |
|
| 405 |
return newRV_noinc ((SV*)av); |
| 406 |
} |
| 407 |
|
| 408 |
static SV * |
| 409 |
decode_empty () |
| 410 |
{ |
| 411 |
AV *av = newAV (); |
| 412 |
av_push (av, newSViv (VBI_EMPTY)); |
| 413 |
return newRV_noinc ((SV*)av); |
| 414 |
} |
| 415 |
|
| 416 |
static SV * |
| 417 |
decoder_decode (decoder *dec, UI y, u8 *line) |
| 418 |
{ |
| 419 |
UI type; |
| 420 |
u8 data[45]; /* 45 bytes per line are max. */ |
| 421 |
UI i; |
| 422 |
int did_agc; |
| 423 |
|
| 424 |
type = VBI_VT | VBI_EMPTY | VBI_OTHER | VBI_VC; /* can be everywhere */ |
| 425 |
if (y == 16 - 7) type |= VBI_VPS; |
| 426 |
if (y > 17 - 7) type |= VBI_VDAT; |
| 427 |
|
| 428 |
type &= dec->types; |
| 429 |
|
| 430 |
/* don't do anything unless we need to */ |
| 431 |
if (type) |
| 432 |
{ |
| 433 |
dec->line = line; |
| 434 |
dec->y = y; |
| 435 |
dec->pos = 0; |
| 436 |
|
| 437 |
did_agc = dec->did_agc; |
| 438 |
|
| 439 |
/* maybe do agc? */ |
| 440 |
if (!dec->did_agc || y == 20-7) |
| 441 |
{ |
| 442 |
u8 *n = line + 120; |
| 443 |
u8 max = 0, min = 255; |
| 444 |
do |
| 445 |
{ |
| 446 |
if (*n > max) max = *n; |
| 447 |
if (*n < min) min = *n; |
| 448 |
} |
| 449 |
while (++n < line + 300); |
| 450 |
|
| 451 |
if (max > min + 30) |
| 452 |
{ |
| 453 |
dec->offset = 128 - (((int)max + (int)min) >> 1); |
| 454 |
dec->did_agc = 1; |
| 455 |
} |
| 456 |
} |
| 457 |
|
| 458 |
if (dec->did_agc) |
| 459 |
{ |
| 460 |
if (type & VBI_VT) |
| 461 |
{ |
| 462 |
dec->step = D2FP (FREQ / FREQ_VT); |
| 463 |
decoder_scan_start (dec, 50, 350); |
| 464 |
|
| 465 |
data[0] = get_byte (dec); |
| 466 |
if ((data[0] & 0xfe) == 0x54) |
| 467 |
{ |
| 468 |
data[1] = get_byte (dec); |
| 469 |
switch (data[1]) |
| 470 |
{ |
| 471 |
case 0x27: |
| 472 |
dec->pos -= dec->step * 2; |
| 473 |
case 0x4e: |
| 474 |
dec->pos -= dec->step * 2; |
| 475 |
case 0x9d: |
| 476 |
dec->pos -= dec->step * 2; |
| 477 |
case 0x75: |
| 478 |
dec->pos -= dec->step * 2; |
| 479 |
case 0xd5: |
| 480 |
dec->pos -= dec->step * 2; |
| 481 |
data[1] = 0x55; |
| 482 |
case 0x55: |
| 483 |
break; |
| 484 |
default: |
| 485 |
; /* no teletext page */ |
| 486 |
} |
| 487 |
|
| 488 |
if (data[1] == 0x55) |
| 489 |
{ |
| 490 |
data[2] = get_byte (dec); |
| 491 |
if (data[2] == 0x27 || data[2] == 0xe7) |
| 492 |
{ |
| 493 |
for (i = 3; i < 45; i++) |
| 494 |
data[i] = get_byte (dec); |
| 495 |
return decode_vt (data); |
| 496 |
} |
| 497 |
} |
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
if (type & VBI_VPS) |
| 502 |
{ |
| 503 |
decoder_scan_start (dec, 150, 260); |
| 504 |
dec->step = D2FP (FREQ / FREQ_VPS); /* shift encoding, two "pixels"/bit (skip the 2nd) */ |
| 505 |
data[0] = get_byte_SE (dec); |
| 506 |
if (data[0] == 0xff) |
| 507 |
{ |
| 508 |
data[1] = get_byte_SE (dec); |
| 509 |
if (data[1] == 0x5d || data[1] == 0x5f) |
| 510 |
{ |
| 511 |
for (i = 2; i < 16; i++) |
| 512 |
data[i] = get_byte_SE (dec); |
| 513 |
return decode_vps (data); |
| 514 |
} |
| 515 |
} |
| 516 |
} |
| 517 |
|
| 518 |
#if 0 |
| 519 |
if (type & VBI_VDAT) |
| 520 |
{ |
| 521 |
dec->step = D2FP (FREQ / FREQ_VDAT); |
| 522 |
decoder_scan_start (dec, 150, 200); |
| 523 |
} |
| 524 |
|
| 525 |
if (type & VBI_VC) |
| 526 |
{ |
| 527 |
dec->step = D2FP (FREQ / FREQ_VC); |
| 528 |
decoder_scan_start (dec, 150, 200); |
| 529 |
} |
| 530 |
#endif |
| 531 |
|
| 532 |
/* watch out for empty lines, test signals etc.. */ |
| 533 |
if (type & VBI_OTHER) |
| 534 |
{ |
| 535 |
dec->did_agc = did_agc; /* other signals do not affect agc, yet */ |
| 536 |
|
| 537 |
dec->step = D2FP (FREQ); |
| 538 |
decoder_scan_start (dec, 100, 500); |
| 539 |
if (dec->pos < I2FP (450)) |
| 540 |
return decoder_decode_other (dec); |
| 541 |
} |
| 542 |
} |
| 543 |
|
| 544 |
dec->did_agc = did_agc; |
| 545 |
|
| 546 |
if (type & VBI_EMPTY) |
| 547 |
return decode_empty (); |
| 548 |
} |
| 549 |
|
| 550 |
return 0; |
| 551 |
} |
| 552 |
|
| 553 |
/* vtx decoding routines taken from videotext-0.6.971023, |
| 554 |
* Copyright (c) 1994-96 Martin Buck */ |
| 555 |
|
| 556 |
#define VTX_COLMASK 0x07 |
| 557 |
#define VTX_BGMASK (0x07 << 3) |
| 558 |
#define VTX_G1 (1 << 6) |
| 559 |
#define VTX_GRSEP (1 << 8) |
| 560 |
#define VTX_HIDDEN (1 << 9) |
| 561 |
#define VTX_BOX (1 << 10) |
| 562 |
#define VTX_FLASH (1 << 11) |
| 563 |
#define VTX_DOUBLE1 (1 << 12) |
| 564 |
#define VTX_DOUBLE2 (1 << 13) |
| 565 |
#define VTX_INVERT (1 << 14) |
| 566 |
#define VTX_DOUBLE (VTX_DOUBLE1 | VTX_DOUBLE2) |
| 567 |
|
| 568 |
static const u8 g0_to_iso_table[256] = |
| 569 |
" " |
| 570 |
" !\"#$%&'()*+,-./0123456789:;<=>?" |
| 571 |
"@ABCDEFGHIJKLMNOPQRSTUVWXYZAOU^#" |
| 572 |
"-abcdefghijklmnopqrstuvwxyzaous#" |
| 573 |
" " |
| 574 |
" " |
| 575 |
" " |
| 576 |
" "; |
| 577 |
|
| 578 |
/* one-to-one copy */ |
| 579 |
static int |
| 580 |
decode_vtpage (u8 *src, UI lines, u8 *chr, u16 *attr) |
| 581 |
{ |
| 582 |
UI line, col, pos, graphics, grhold, doubleht, nextattr = 0; |
| 583 |
u16 *lastattr, default_attrib = 7, next_attrib; |
| 584 |
u8 c, *lastchr, default_chr = ' '; |
| 585 |
UI lang; |
| 586 |
|
| 587 |
lang = 4; |
| 588 |
pos = 0; |
| 589 |
doubleht = 0; |
| 590 |
|
| 591 |
for (line = 0; line < lines; line++) { |
| 592 |
lastchr = &default_chr; |
| 593 |
lastattr = &default_attrib; |
| 594 |
graphics = grhold = 0; |
| 595 |
if (doubleht && pos > 40) { |
| 596 |
for (col = 0; col <= 39; col++) { |
| 597 |
if (attr[pos - 40] & VTX_DOUBLE1) { |
| 598 |
chr[pos] = chr[pos - 40]; |
| 599 |
chr[pos - 40] = ' '; |
| 600 |
attr[pos] = (attr[pos - 40] & ~VTX_DOUBLE1) | VTX_DOUBLE2; |
| 601 |
} else { |
| 602 |
chr[pos] = ' '; |
| 603 |
attr[pos] = attr[pos - 40]; |
| 604 |
} |
| 605 |
pos++; |
| 606 |
} |
| 607 |
doubleht = 0; |
| 608 |
} else { |
| 609 |
for (col = 0; col <= 39; col++) { |
| 610 |
c = src[pos]; |
| 611 |
if (parodd(c)) { |
| 612 |
chr[pos] = 254; /* Parity error */ |
| 613 |
attr[pos] = 7; |
| 614 |
/* return 0 */ /*?*/ |
| 615 |
} else if ((c & 0x7f) >= 32) { /* Normal character */ |
| 616 |
c &= 0x7f; |
| 617 |
if (!graphics || (c >= 64 && c <= 95)) { |
| 618 |
chr[pos] = g0_to_iso_table [c]; |
| 619 |
attr[pos] = *lastattr; |
| 620 |
} else { |
| 621 |
chr[pos] = c + (c >= 96 ? 64 : 96); |
| 622 |
attr[pos] = *lastattr | VTX_G1; |
| 623 |
} |
| 624 |
} else { |
| 625 |
c &= 0x7f; |
| 626 |
chr[pos] = ((grhold && graphics ) ? *lastchr : ' '); |
| 627 |
if (c <= 7) { /* Set alphanumerics-color */ |
| 628 |
attr[pos] = *lastattr; |
| 629 |
next_attrib = (*lastattr & ~(VTX_COLMASK | VTX_HIDDEN)) + c; |
| 630 |
nextattr = 1; |
| 631 |
graphics = 0; |
| 632 |
} else if (c == 8 || c == 9) { /* Flash on/off */ |
| 633 |
attr[pos] = (*lastattr & ~VTX_FLASH) + VTX_FLASH * (c == 8); |
| 634 |
} else if (c == 10 || c == 11) { /* End/start box */ |
| 635 |
attr[pos] = (*lastattr & ~VTX_BOX) + VTX_BOX * (c == 11); |
| 636 |
} else if (c == 12 || c == 13) { /* Normal/double height */ |
| 637 |
attr[pos] = (*lastattr & ~VTX_DOUBLE1) + VTX_DOUBLE1 * (c == 13); |
| 638 |
if (c == 13) |
| 639 |
doubleht = 1; |
| 640 |
} else if (c == 14 || c == 15 || c == 27) { /* SO, SI, ESC (ignored) */ |
| 641 |
attr[pos] = *lastattr; |
| 642 |
} else if (c >= 16 && c <= 23) { /* Set graphics-color */ |
| 643 |
attr[pos] = *lastattr; |
| 644 |
next_attrib = (*lastattr & ~(VTX_COLMASK | VTX_HIDDEN)) + c - 16; |
| 645 |
nextattr = 1; |
| 646 |
graphics = 1; |
| 647 |
} else if (c == 24) { /* Conceal display */ |
| 648 |
attr[pos] = *lastattr | VTX_HIDDEN; |
| 649 |
} else if (c == 25 || c == 26) { /* Contiguous/separated graphics */ |
| 650 |
attr[pos] = (*lastattr & ~VTX_GRSEP) + VTX_GRSEP * (c == 26); |
| 651 |
} else if (c == 28) { /* Black background */ |
| 652 |
attr[pos] = *lastattr & ~VTX_BGMASK; |
| 653 |
} else if (c == 29) { /* Set background */ |
| 654 |
attr[pos] = (*lastattr & ~VTX_BGMASK) + ((*lastattr & VTX_COLMASK) << 3); |
| 655 |
} else if (c == 30 || c == 31) { /* Hold/release graphics */ |
| 656 |
attr[pos] = *lastattr; |
| 657 |
grhold = (c == 30); |
| 658 |
if (grhold && graphics) |
| 659 |
chr[pos] = *lastchr; |
| 660 |
} else { |
| 661 |
return 0; |
| 662 |
} |
| 663 |
} |
| 664 |
lastchr = chr + pos; |
| 665 |
if (nextattr) { |
| 666 |
lastattr = &next_attrib; |
| 667 |
nextattr = 0; |
| 668 |
} else { |
| 669 |
lastattr = attr + pos; |
| 670 |
} |
| 671 |
pos++; |
| 672 |
} |
| 673 |
} |
| 674 |
} |
| 675 |
return 1; |
| 676 |
} |
| 677 |
|
| 678 |
static SV * |
| 679 |
decode_ansi (u8 *chr, u16 *atr) |
| 680 |
{ |
| 681 |
UI x; |
| 682 |
SV *sv = newSVpvn ("", 0); |
| 683 |
u16 o; |
| 684 |
|
| 685 |
for (x=0; x < VT_COLS; x++) |
| 686 |
{ |
| 687 |
u16 a = *atr++; |
| 688 |
if (x == 0 || (a & 0x07) != (o & 0x07)) |
| 689 |
sv_catpvf (sv, "\x1b[3%dm", a & 7); |
| 690 |
if (x == 0 || (a & 0x38) != (o & 0x38)) |
| 691 |
sv_catpvf (sv, "\x1b[4%dm", (o & 0x38)>>3); |
| 692 |
if (x == 0 || (a & VTX_FLASH) != (o & VTX_FLASH)) |
| 693 |
sv_catpvf (sv, "\x1b[%sm", a & VTX_FLASH ? "7" : ""); |
| 694 |
|
| 695 |
sv_catpvf (sv, "%c", a & VTX_G1 ? 'x' : *chr); |
| 696 |
|
| 697 |
chr++; |
| 698 |
o = a; |
| 699 |
} |
| 700 |
|
| 701 |
sv_catpv (sv, "\x1b[37;40;0m"); |
| 702 |
|
| 703 |
return sv; |
| 704 |
} |
| 705 |
|
| 706 |
#define valid_packet(sv) (SvPOK(packet) && SvCUR(packet) == 40) |
| 707 |
#define consume_byte(store) \ |
| 708 |
if (bp >= 39) \ |
| 709 |
{ \ |
| 710 |
SV **sv = av_fetch(stream, pi, 0); pi++; \ |
| 711 |
if (!sv) \ |
| 712 |
goto eostream; \ |
| 713 |
packet = *sv; \ |
| 714 |
if (!valid_packet (pascket)) \ |
| 715 |
goto skip; \ |
| 716 |
p = SvPV_nolen (packet); \ |
| 717 |
bp = 0; \ |
| 718 |
} \ |
| 719 |
(store) = p[++bp] |
| 720 |
|
| 721 |
static void |
| 722 |
decode_stream (AV *stream) |
| 723 |
{ |
| 724 |
dSP; |
| 725 |
|
| 726 |
while (av_len (stream) >= 0) |
| 727 |
{ |
| 728 |
UI pi = 1; |
| 729 |
SV *packet = *av_fetch(stream, 0, 1); |
| 730 |
|
| 731 |
if (valid_packet (packet)) |
| 732 |
{ |
| 733 |
u8 *p = SvPV_nolen(packet); |
| 734 |
u8 bp = p[0] == 0xff ? p[1] : unham4 (p[0])*3+1; |
| 735 |
|
| 736 |
if (bp <= 12*3+1 && p[bp] == 0xa1) |
| 737 |
{ |
| 738 |
u8 buf[4]; |
| 739 |
|
| 740 |
consume_byte (buf[0]); consume_byte (buf[1]); |
| 741 |
consume_byte (buf[2]); consume_byte (buf[3]); |
| 742 |
|
| 743 |
{ |
| 744 |
u16 sh = unham8 (buf[0], buf[1]) | unham8 (buf[2], buf[3]) << 8; |
| 745 |
u8 bt = sh & 0x1f; |
| 746 |
u16 bl = sh >> 5; |
| 747 |
SV *block = sv_2mortal (newSVpvn (&bt, 1)); |
| 748 |
|
| 749 |
while (bl--) |
| 750 |
{ |
| 751 |
consume_byte (buf[0]); |
| 752 |
sv_catpvn (block, buf, 1); |
| 753 |
} |
| 754 |
|
| 755 |
EXTEND (SP, 1); |
| 756 |
PUSHs (block); |
| 757 |
|
| 758 |
/* optimize, do only when still in first packet! */ |
| 759 |
do { |
| 760 |
if (bp >= 39) |
| 761 |
break; |
| 762 |
|
| 763 |
bp++; |
| 764 |
if (p[bp] == 0xa1) |
| 765 |
{ |
| 766 |
p[0] = 0xff; |
| 767 |
p[1] = bp; |
| 768 |
pi--; |
| 769 |
break; |
| 770 |
} |
| 771 |
} while (p[bp] = 0x5e); |
| 772 |
} |
| 773 |
} |
| 774 |
} |
| 775 |
|
| 776 |
skip: |
| 777 |
while (pi--) |
| 778 |
SvREFCNT_dec(av_shift(stream)); |
| 779 |
} |
| 780 |
eostream: |
| 781 |
|
| 782 |
PUTBACK; |
| 783 |
} |
| 784 |
|
| 785 |
static u8 * |
| 786 |
unham_block (u8 *src, UI len, u8 *dst, UI dlen) |
| 787 |
{ |
| 788 |
u16 sh = *src | (len-1)<<5; |
| 789 |
u8 sum = ( sh & 15) |
| 790 |
+ ((sh >> 4) & 15) |
| 791 |
+ ((sh >> 8) & 15) |
| 792 |
+ ((sh >> 12) & 15); |
| 793 |
|
| 794 |
if (len < 5) |
| 795 |
return 0; |
| 796 |
|
| 797 |
sum += unham8 (src[1], src[2]); |
| 798 |
src += 3; len -= 3; |
| 799 |
|
| 800 |
dlen--; |
| 801 |
|
| 802 |
if (len < dlen) |
| 803 |
return 0; |
| 804 |
|
| 805 |
while (dlen) |
| 806 |
{ |
| 807 |
*dst = unham8 (src[0], src[1]); |
| 808 |
sum += (*dst >> 4) + (*dst & 15); |
| 809 |
#if 0 |
| 810 |
printf ("%02x ", *dst); |
| 811 |
#endif |
| 812 |
dst++; src += 2; dlen--; |
| 813 |
} |
| 814 |
#if 0 |
| 815 |
printf ("\n"); |
| 816 |
printf ("sh = %04x, len = %02x, sum = %02x\n", sh, len, sum); |
| 817 |
#endif |
| 818 |
if (sum) |
| 819 |
return 0; |
| 820 |
|
| 821 |
return src; |
| 822 |
} |
| 823 |
|
| 824 |
/* must not be a macro, see nvec */ |
| 825 |
static U32 |
| 826 |
vec(u8 *d, UI bit, UI len) |
| 827 |
{ |
| 828 |
U32 word = bit >> 3; |
| 829 |
|
| 830 |
/*printf ("vec(%d,%d) %d (%d)\n",bit,len,(bit & 7) + len,(bit & 7) + len < 32);*/ |
| 831 |
assert ((bit & 7) + len < 32); |
| 832 |
|
| 833 |
word = (d[word] ) |
| 834 |
| (d[word+1] << 8) |
| 835 |
| (d[word+2] << 16) |
| 836 |
| (d[word+3] << 24); |
| 837 |
|
| 838 |
return (word >> (bit & 7)) & (((U32)1 << len) - 1); |
| 839 |
} |
| 840 |
|
| 841 |
#define hv_store_sv(name,value) hv_store (hv, #name, strlen(#name), (SV*)(value), 0) |
| 842 |
#define hv_store_iv(name,value) hv_store_sv (name, newSViv (value)) |
| 843 |
#define nvec(bits) vec (c, (ofs += (bits)) - (bits), (bits)) |
| 844 |
|
| 845 |
#define decode_escape_sequences(av) \ |
| 846 |
{ \ |
| 847 |
UI no_escapes = nvec (8); \ |
| 848 |
av = newAV (); \ |
| 849 |
while (no_escapes--) \ |
| 850 |
{ \ |
| 851 |
AV *esc = newAV (); \ |
| 852 |
av_push (esc, newSViv (nvec (10))); \ |
| 853 |
av_push (esc, newSViv (nvec (6))); \ |
| 854 |
av_push (esc, newSViv (nvec (8))); \ |
| 855 |
av_push (av, newRV_noinc((SV*)esc)); \ |
| 856 |
} \ |
| 857 |
} |
| 858 |
|
| 859 |
#define decode_transparent_string(sv, len) \ |
| 860 |
{ \ |
| 861 |
UI l = len; \ |
| 862 |
sv = newSVpvn (s, l); \ |
| 863 |
s += l; \ |
| 864 |
while (l--) \ |
| 865 |
SvPV_nolen (sv)[l] &= 0x7f; \ |
| 866 |
} |
| 867 |
|
| 868 |
#define decode_descriptor_loop(av, ll) \ |
| 869 |
av = newAV (); \ |
| 870 |
while (ll--) \ |
| 871 |
{ \ |
| 872 |
AV *desc = newAV (); \ |
| 873 |
av_push (desc, newSViv (nvec (6))); \ |
| 874 |
av_push (desc, newSViv (nvec (6))); \ |
| 875 |
av_push (desc, newSViv (nvec (8))); \ |
| 876 |
av_push (av, newRV_noinc((SV*)desc)); \ |
| 877 |
} |
| 878 |
|
| 879 |
static void |
| 880 |
decode_epg (HV *hv, UI appid, u8 *c, u8 *s) |
| 881 |
{ |
| 882 |
UI ofs = 16; |
| 883 |
UI len; |
| 884 |
AV *av; |
| 885 |
SV *sv; |
| 886 |
|
| 887 |
hv_store_iv (ca_mode, nvec(2)); |
| 888 |
hv_store_iv (_copyright, nvec(1)); |
| 889 |
|
| 890 |
ofs++; /* reserved */ |
| 891 |
|
| 892 |
switch (appid) |
| 893 |
{ |
| 894 |
case 1: |
| 895 |
{ |
| 896 |
hv_store_iv (epg_version, nvec( 6)); |
| 897 |
hv_store_iv (epg_version_swo, nvec( 6)); |
| 898 |
hv_store_iv (no_navigation, nvec(16)); |
| 899 |
hv_store_iv (no_osd, nvec(16)); |
| 900 |
hv_store_iv (no_message, nvec(16)); |
| 901 |
hv_store_iv (no_navigation_swo,nvec(16)); |
| 902 |
hv_store_iv (no_osd_swo, nvec(16)); |
| 903 |
hv_store_iv (no_message_swo, nvec(16)); |
| 904 |
len = nvec(8); |
| 905 |
hv_store_iv (this_network_op, nvec( 8)); |
| 906 |
decode_transparent_string (sv, nvec (5)); |
| 907 |
hv_store_sv (service_name, sv); |
| 908 |
hv_store_iv (no_updates, nvec( 1)); |
| 909 |
|
| 910 |
ofs += 2; |
| 911 |
|
| 912 |
av = newAV (); |
| 913 |
while (len--) |
| 914 |
{ |
| 915 |
HV *hv = newHV (); |
| 916 |
int LTO; |
| 917 |
hv_store_iv (cni, nvec (16)); |
| 918 |
LTO = nvec (7) * 15; |
| 919 |
if (nvec(1)) |
| 920 |
LTO = -LTO; |
| 921 |
hv_store_iv (lto, LTO); |
| 922 |
hv_store_iv (no_days, nvec( 5)); |
| 923 |
decode_transparent_string (sv, nvec( 5)); |
| 924 |
hv_store_sv (netwop_name, sv); |
| 925 |
hv_store_iv (default_alphabet, nvec( 7)); |
| 926 |
hv_store_iv (prog_start_no, nvec(16)); |
| 927 |
hv_store_iv (prog_stop_no, nvec(16)); |
| 928 |
hv_store_iv (prog_stop_no_swo, nvec(16)); |
| 929 |
hv_store_iv (network_add_info, nvec(11)); |
| 930 |
|
| 931 |
av_push (av, newRV_noinc ((SV*)hv)); |
| 932 |
} |
| 933 |
hv_store_sv (networks, newRV_noinc ((SV*)av)); |
| 934 |
break; |
| 935 |
} |
| 936 |
case 2: |
| 937 |
{ |
| 938 |
UI background_reuse; |
| 939 |
|
| 940 |
hv_store_iv (block_no, nvec(16)); |
| 941 |
hv_store_iv (audio_mode, vec(c, ofs, 12) & 3); |
| 942 |
hv_store_iv (feature_flags, nvec(12)); |
| 943 |
hv_store_iv (netwop_no, nvec( 8)); |
| 944 |
hv_store_iv (start_time, nvec(16)); |
| 945 |
hv_store_iv (start_date, nvec(16)); |
| 946 |
hv_store_iv (stop_time, nvec(16)); |
| 947 |
hv_store_iv (_pil, nvec(20)); |
| 948 |
hv_store_iv (parental_rating, nvec( 4)); |
| 949 |
hv_store_iv (editorial_rating,nvec( 3)); |
| 950 |
{ |
| 951 |
UI no_themes = nvec( 3); |
| 952 |
UI no_sortcrit = nvec( 3); |
| 953 |
UI descriptor_looplength = nvec( 6); |
| 954 |
background_reuse = nvec( 1); |
| 955 |
|
| 956 |
av = newAV (); |
| 957 |
while (no_themes--) |
| 958 |
av_push (av, newSViv (nvec (8))); |
| 959 |
hv_store_sv (themes, newRV_noinc((SV*)av)); |
| 960 |
|
| 961 |
av = newAV (); |
| 962 |
while (no_sortcrit--) |
| 963 |
av_push (av, newSViv (nvec (8))); |
| 964 |
hv_store_sv (sortcrits, newRV_noinc((SV*)av)); |
| 965 |
|
| 966 |
decode_descriptor_loop (av, descriptor_looplength); |
| 967 |
hv_store_sv (descriptors, newRV_noinc((SV*)av)); |
| 968 |
|
| 969 |
ofs = (ofs+7) & ~7; |
| 970 |
|
| 971 |
decode_escape_sequences (av); |
| 972 |
hv_store_sv (title_escape_sequences, newRV_noinc((SV*)av)); |
| 973 |
decode_transparent_string (sv, nvec (8)); |
| 974 |
hv_store_sv (title, sv); |
| 975 |
} |
| 976 |
|
| 977 |
if (background_reuse) |
| 978 |
hv_store_iv (title_length, nvec (16)); |
| 979 |
else |
| 980 |
{ |
| 981 |
decode_escape_sequences (av); |
| 982 |
hv_store_sv (shortinfo_escape_sequences, newRV_noinc((SV*)av)); |
| 983 |
decode_transparent_string (sv, nvec (8)); |
| 984 |
hv_store_sv (shortinfo, sv); |
| 985 |
|
| 986 |
len = nvec (3); |
| 987 |
ofs += 2; |
| 988 |
switch (len) |
| 989 |
{ |
| 990 |
case 0: |
| 991 |
decode_escape_sequences (av); |
| 992 |
hv_store_sv (longinfo_escape_sequences, newRV_noinc((SV*)av)); |
| 993 |
decode_transparent_string (sv, nvec (8)); |
| 994 |
hv_store_sv (longinfo, sv); |
| 995 |
break; |
| 996 |
case 1: |
| 997 |
decode_escape_sequences (av); |
| 998 |
hv_store_sv (longinfo_escape_sequences, newRV_noinc((SV*)av)); |
| 999 |
decode_transparent_string (sv, nvec (10)); |
| 1000 |
hv_store_sv (longinfo, sv); |
| 1001 |
break; |
| 1002 |
default: |
| 1003 |
printf ("UNKNOWN LONGINFO TYPE %d\n", len); |
| 1004 |
} |
| 1005 |
} |
| 1006 |
|
| 1007 |
break; |
| 1008 |
} |
| 1009 |
case 3: |
| 1010 |
{ |
| 1011 |
UI descriptor_ll; |
| 1012 |
hv_store_iv (block_no, nvec(16)); |
| 1013 |
hv_store_iv (header_size, nvec( 2)); |
| 1014 |
len = nvec(4); |
| 1015 |
hv_store_iv (message_size, nvec( 3)); |
| 1016 |
ofs++; |
| 1017 |
descriptor_ll = nvec(6); |
| 1018 |
decode_descriptor_loop (av, descriptor_ll); |
| 1019 |
hv_store_sv (descriptors, newRV_noinc((SV*)av)); |
| 1020 |
ofs = (ofs+7) & ~7; |
| 1021 |
|
| 1022 |
decode_escape_sequences (av); |
| 1023 |
hv_store_sv (header_escape_sequences, newRV_noinc((SV*)av)); |
| 1024 |
|
| 1025 |
decode_transparent_string (sv, nvec(8)); |
| 1026 |
hv_store_sv (header, sv); |
| 1027 |
|
| 1028 |
hv_store_iv (message_attribute,nvec(8)); |
| 1029 |
|
| 1030 |
av = newAV (); |
| 1031 |
while (len--) |
| 1032 |
{ |
| 1033 |
AV *av2; |
| 1034 |
UI len; |
| 1035 |
HV *hv = newHV (); |
| 1036 |
|
| 1037 |
hv_store_iv (next_id, nvec(16)); |
| 1038 |
hv_store_iv (next_type, nvec( 4)); |
| 1039 |
|
| 1040 |
len = nvec(4); |
| 1041 |
av2 = newAV (); |
| 1042 |
while (len--) |
| 1043 |
{ |
| 1044 |
UI kind = nvec(8); |
| 1045 |
av_push (av2, newSViv (kind)); |
| 1046 |
switch (kind) |
| 1047 |
{ |
| 1048 |
case 0x02: case 0x10: case 0x11: case 0x18: |
| 1049 |
case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x26: case 0x27: |
| 1050 |
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37: |
| 1051 |
case 0x40: case 0x41: |
| 1052 |
av_push (av2, newSViv (nvec ( 8))); |
| 1053 |
break; |
| 1054 |
|
| 1055 |
case 0x80: case 0x81: |
| 1056 |
av_push (av2, newSViv (nvec (16))); |
| 1057 |
break; |
| 1058 |
|
| 1059 |
case 0xc0: |
| 1060 |
av_push (av2, newSViv (nvec (12))); |
| 1061 |
av_push (av2, newSViv (nvec (12))); |
| 1062 |
break; |
| 1063 |
|
| 1064 |
case 0xc8: case 0xc9: |
| 1065 |
av_push (av2, newSViv (nvec (24))); |
| 1066 |
break; |
| 1067 |
|
| 1068 |
default: |
| 1069 |
abort (); |
| 1070 |
} |
| 1071 |
} |
| 1072 |
hv_store_sv (attributes, newRV_noinc((SV*)av2)); |
| 1073 |
|
| 1074 |
decode_escape_sequences (av2); |
| 1075 |
hv_store_sv (header_escape_sequences, newRV_noinc((SV*)av2)); |
| 1076 |
decode_transparent_string (sv, nvec(8)); |
| 1077 |
hv_store_sv (event, sv); |
| 1078 |
|
| 1079 |
av_push (av, newRV_noinc((SV*)hv)); |
| 1080 |
} |
| 1081 |
hv_store_sv (events, newRV_noinc((SV*)av)); |
| 1082 |
|
| 1083 |
break; |
| 1084 |
} |
| 1085 |
case 4: |
| 1086 |
{ |
| 1087 |
UI block_no = nvec (16); |
| 1088 |
UI descriptor_ll; |
| 1089 |
UI msg_len; |
| 1090 |
hv_store_iv (block_no, block_no); |
| 1091 |
hv_store_iv (message_attribute,nvec(8)); |
| 1092 |
hv_store_iv (header_size, nvec(3)); |
| 1093 |
hv_store_iv (message_size, nvec(3)); |
| 1094 |
descriptor_ll = nvec(6); |
| 1095 |
if (!block_no) |
| 1096 |
{ |
| 1097 |
decode_escape_sequences (av); |
| 1098 |
hv_store_sv (message_escape_sequences, newRV_noinc((SV*)av)); |
| 1099 |
msg_len = nvec(10); |
| 1100 |
ofs += 6; |
| 1101 |
} |
| 1102 |
|
| 1103 |
decode_escape_sequences (av); |
| 1104 |
hv_store_sv (header_escape_sequences, newRV_noinc((SV*)av)); |
| 1105 |
|
| 1106 |
decode_transparent_string (sv, nvec(8)); |
| 1107 |
hv_store_sv (header, sv); |
| 1108 |
|
| 1109 |
if (!block_no) |
| 1110 |
{ |
| 1111 |
decode_transparent_string (sv, msg_len); |
| 1112 |
hv_store_sv (message, sv); |
| 1113 |
} |
| 1114 |
|
| 1115 |
decode_descriptor_loop (av, descriptor_ll); |
| 1116 |
hv_store_sv (descriptors, newRV_noinc((SV*)av)); |
| 1117 |
break; |
| 1118 |
} |
| 1119 |
case 5: |
| 1120 |
{ |
| 1121 |
UI descriptor_ll; |
| 1122 |
hv_store_iv (block_no, nvec(16)); |
| 1123 |
descriptor_ll = nvec(6); |
| 1124 |
decode_descriptor_loop (av, descriptor_ll); |
| 1125 |
hv_store_sv (descriptors, newRV_noinc((SV*)av)); |
| 1126 |
ofs = (ofs+7) & ~7; |
| 1127 |
|
| 1128 |
decode_escape_sequences (av); |
| 1129 |
hv_store_sv (message_escape_sequences, newRV_noinc((SV*)av)); |
| 1130 |
|
| 1131 |
decode_transparent_string (sv, nvec(10)); |
| 1132 |
hv_store_sv (message, sv); |
| 1133 |
|
| 1134 |
break; |
| 1135 |
} |
| 1136 |
default: |
| 1137 |
printf ("UNKNOWN EPG DATATYPE ($%02x)\n", appid); |
| 1138 |
} |
| 1139 |
} |
| 1140 |
|
| 1141 |
static SV * |
| 1142 |
decode_block(u8 *b, UI len, AV *bi) |
| 1143 |
{ |
| 1144 |
dSP; |
| 1145 |
u8 ctrl[1024]; |
| 1146 |
u8 bt = *b; |
| 1147 |
|
| 1148 |
if (bt == 0) |
| 1149 |
{ |
| 1150 |
if ((b = unham_block (b, len, ctrl, (len-1)>>1 ))) |
| 1151 |
{ |
| 1152 |
UI app_no = ctrl[0]; |
| 1153 |
UI app; |
| 1154 |
av_clear (bi); |
| 1155 |
for (app=1; app<=app_no; app++) |
| 1156 |
av_store (bi, app, newSViv (vec (ctrl, app*16-8, 16))); |
| 1157 |
} |
| 1158 |
} |
| 1159 |
else if (len >= 5) |
| 1160 |
{ |
| 1161 |
if (bt <= av_len (bi) && SvOK(*av_fetch (bi, bt, 0))) |
| 1162 |
{ |
| 1163 |
u16 appid = SvIV (*av_fetch (bi, bt, 0)); |
| 1164 |
if (appid == 0) /* EPG */ |
| 1165 |
{ |
| 1166 |
if ((b = unham_block (b, len, ctrl, unham8 (b[3], b[4]) | (unham4 (b[5]) << 8) & 1023))) |
| 1167 |
{ |
| 1168 |
HV *hv = newHV (); |
| 1169 |
/* _now_ we have an epg structure. decode it */ |
| 1170 |
|
| 1171 |
appid = vec(ctrl,10,6); |
| 1172 |
EXTEND (SP, 2); |
| 1173 |
PUSHs (sv_2mortal (newSViv (appid))); |
| 1174 |
PUSHs (sv_2mortal (newRV_noinc ((SV*)hv))); |
| 1175 |
|
| 1176 |
decode_epg (hv, appid, ctrl, b); |
| 1177 |
} |
| 1178 |
else |
| 1179 |
printf ("checksum error found block %d, len %d, appid = %d (clen 0)\n", bt, len, appid); |
| 1180 |
} |
| 1181 |
else |
| 1182 |
/* other applications not defined (to my knowledge) */; |
| 1183 |
} |
| 1184 |
else |
| 1185 |
/* no bundle info: can't parse yet */; |
| 1186 |
} |
| 1187 |
|
| 1188 |
PUTBACK; |
| 1189 |
} |
| 1190 |
|
| 1191 |
MODULE = Video::Capture::VBI PACKAGE = Video::Capture::VBI |
| 1192 |
|
| 1193 |
PROTOTYPES: ENABLE |
| 1194 |
|
| 1195 |
int |
| 1196 |
unham4(data) |
| 1197 |
SV * data |
| 1198 |
CODE: |
| 1199 |
STRLEN len; |
| 1200 |
unsigned char *d = (unsigned char *)SvPV (data, len); |
| 1201 |
|
| 1202 |
if (len < 1) |
| 1203 |
croak ("unham4: length must be at least 1"); |
| 1204 |
|
| 1205 |
RETVAL = unham4 (*d); |
| 1206 |
OUTPUT: |
| 1207 |
RETVAL |
| 1208 |
|
| 1209 |
int |
| 1210 |
unham8(data) |
| 1211 |
SV * data |
| 1212 |
CODE: |
| 1213 |
STRLEN len; |
| 1214 |
unsigned char *d = (unsigned char *)SvPV (data, len); |
| 1215 |
|
| 1216 |
if (len < 2) |
| 1217 |
croak ("unham8: length must be at least 2"); |
| 1218 |
|
| 1219 |
RETVAL = unham8 (d[0], d[1]); |
| 1220 |
OUTPUT: |
| 1221 |
RETVAL |
| 1222 |
|
| 1223 |
void |
| 1224 |
decode_field(field, types) |
| 1225 |
SV * field |
| 1226 |
unsigned int types |
| 1227 |
PPCODE: |
| 1228 |
{ |
| 1229 |
UI lines = SvCUR(field) / VBI_BPL; |
| 1230 |
UI line; |
| 1231 |
decoder dec; |
| 1232 |
|
| 1233 |
decoder_init (&dec, types); |
| 1234 |
|
| 1235 |
EXTEND (SP, lines); |
| 1236 |
for (line = 0; line < lines; line++) |
| 1237 |
{ |
| 1238 |
SV *sv = decoder_decode (&dec, line, ((u8*)SvPV_nolen(field)) + line * VBI_BPL); |
| 1239 |
if (sv) |
| 1240 |
PUSHs (sv_2mortal (sv)); |
| 1241 |
} |
| 1242 |
} |
| 1243 |
|
| 1244 |
SV * |
| 1245 |
decode_vps(char *data) |
| 1246 |
|
| 1247 |
SV * |
| 1248 |
decode_vt(char *data) |
| 1249 |
|
| 1250 |
void |
| 1251 |
decode_vtpage(data) |
| 1252 |
SV * data |
| 1253 |
PPCODE: |
| 1254 |
{ |
| 1255 |
u8 chr[VT_COLS*VT_LINES]; |
| 1256 |
u16 atr[VT_COLS*VT_LINES]; |
| 1257 |
UI lines; |
| 1258 |
|
| 1259 |
if (!SvPOK(data)) |
| 1260 |
XSRETURN_EMPTY; |
| 1261 |
|
| 1262 |
lines = SvCUR(data) / VT_COLS; |
| 1263 |
|
| 1264 |
if (lines > VT_LINES) |
| 1265 |
croak ("videotext cannot have more than %d lines (argument has %d lines)\n", VT_LINES, lines); |
| 1266 |
|
| 1267 |
Zero(chr, VT_COLS*VT_LINES, u8); |
| 1268 |
Zero(atr, VT_COLS*VT_LINES, u16); |
| 1269 |
if (decode_vtpage (SvPV_nolen(data), lines, chr, atr)) |
| 1270 |
{ |
| 1271 |
AV *av = newAV (); |
| 1272 |
UI n; |
| 1273 |
|
| 1274 |
for (n = 0; n < VT_COLS*lines; n++) |
| 1275 |
av_push (av, newSViv (atr[n])); |
| 1276 |
|
| 1277 |
EXTEND (SP, 2); |
| 1278 |
PUSHs (sv_2mortal (newSVpvn (chr, VT_COLS*lines))); |
| 1279 |
PUSHs (sv_2mortal (newRV_noinc ((SV*)av))); |
| 1280 |
} |
| 1281 |
} |
| 1282 |
|
| 1283 |
PROTOTYPES: DISABLE |
| 1284 |
|
| 1285 |
void |
| 1286 |
decode_ansi(chr, atr) |
| 1287 |
SV * chr |
| 1288 |
SV * atr |
| 1289 |
PPCODE: |
| 1290 |
{ |
| 1291 |
UI lines = SvCUR(chr) / VT_COLS; |
| 1292 |
UI attr_i = 0; |
| 1293 |
u8 *_chr = SvPV_nolen (chr); |
| 1294 |
u16 _atr[VT_COLS]; |
| 1295 |
|
| 1296 |
EXTEND (SP, lines); |
| 1297 |
|
| 1298 |
while (lines--) |
| 1299 |
{ |
| 1300 |
UI attr_j; |
| 1301 |
for(attr_j = 0; attr_j < VT_COLS; attr_j++) |
| 1302 |
_atr[attr_j] = SvIV (*av_fetch ((AV*)SvRV (atr), attr_i+attr_j, 1)); |
| 1303 |
|
| 1304 |
PUSHs (sv_2mortal (decode_ansi (_chr, _atr))); |
| 1305 |
|
| 1306 |
_chr += VT_COLS; |
| 1307 |
attr_i += VT_COLS; |
| 1308 |
} |
| 1309 |
} |
| 1310 |
|
| 1311 |
unsigned int |
| 1312 |
bcd2dec(bcd) |
| 1313 |
unsigned int bcd |
| 1314 |
CODE: |
| 1315 |
{ |
| 1316 |
UI digit = 1; |
| 1317 |
RETVAL = 0; |
| 1318 |
while (bcd) |
| 1319 |
{ |
| 1320 |
if ((bcd & 15) > 9) |
| 1321 |
XSRETURN_EMPTY; |
| 1322 |
|
| 1323 |
RETVAL += (bcd & 15) * digit; |
| 1324 |
digit *= 10; |
| 1325 |
bcd >>= 4; |
| 1326 |
} |
| 1327 |
} |
| 1328 |
OUTPUT: |
| 1329 |
RETVAL |
| 1330 |
|
| 1331 |
PROTOTYPES: ENABLE |
| 1332 |
|
| 1333 |
MODULE = Video::Capture::VBI PACKAGE = Video::Capture::VBI::EPG |
| 1334 |
|
| 1335 |
void |
| 1336 |
decode_stream(stream) |
| 1337 |
SV * stream |
| 1338 |
PPCODE: |
| 1339 |
if (!SvROK(stream) || SvTYPE(SvRV(stream)) != SVt_PVAV) |
| 1340 |
croak ("decode_epg stream works on arrayrefs"); |
| 1341 |
|
| 1342 |
PUTBACK; |
| 1343 |
decode_stream ((AV*)SvRV(stream)); |
| 1344 |
SPAGAIN; |
| 1345 |
|
| 1346 |
SV * |
| 1347 |
decode_block(block, bundle) |
| 1348 |
SV * block |
| 1349 |
SV * bundle |
| 1350 |
PPCODE: |
| 1351 |
if (!SvROK(bundle) || SvTYPE(SvRV(bundle)) != SVt_PVAV) |
| 1352 |
croak ("bundle info must be arrayref"); |
| 1353 |
|
| 1354 |
PUTBACK; |
| 1355 |
decode_block (SvPV_nolen(block), SvCUR(block), (AV*)SvRV(bundle)); |
| 1356 |
SPAGAIN; |
| 1357 |
|
| 1358 |
BOOT: |
| 1359 |
{ |
| 1360 |
HV *stash = gv_stashpvn("Video::Capture::VBI", 19, TRUE); |
| 1361 |
|
| 1362 |
newCONSTSUB(stash,"VBI_VT", newSViv(VBI_VT)); |
| 1363 |
newCONSTSUB(stash,"VBI_VPS", newSViv(VBI_VPS)); |
| 1364 |
newCONSTSUB(stash,"VBI_VDAT", newSViv(VBI_VDAT)); |
| 1365 |
newCONSTSUB(stash,"VBI_VC", newSViv(VBI_VC)); |
| 1366 |
newCONSTSUB(stash,"VBI_EMPTY", newSViv(VBI_EMPTY)); |
| 1367 |
newCONSTSUB(stash,"VBI_OTHER", newSViv(VBI_OTHER)); |
| 1368 |
|
| 1369 |
newCONSTSUB(stash,"VTX_COLMASK",newSViv(VTX_COLMASK)); |
| 1370 |
newCONSTSUB(stash,"VTX_GRSEP", newSViv(VTX_GRSEP)); |
| 1371 |
newCONSTSUB(stash,"VTX_HIDDEN", newSViv(VTX_HIDDEN)); |
| 1372 |
newCONSTSUB(stash,"VTX_BOX", newSViv(VTX_BOX)); |
| 1373 |
newCONSTSUB(stash,"VTX_FLASH", newSViv(VTX_FLASH)); |
| 1374 |
newCONSTSUB(stash,"VTX_DOUBLE1",newSViv(VTX_DOUBLE1)); |
| 1375 |
newCONSTSUB(stash,"VTX_DOUBLE2",newSViv(VTX_DOUBLE2)); |
| 1376 |
newCONSTSUB(stash,"VTX_INVERT", newSViv(VTX_INVERT)); |
| 1377 |
newCONSTSUB(stash,"VTX_DOUBLE", newSViv(VTX_DOUBLE)); |
| 1378 |
} |
| 1379 |
|
