static inline uint16_t seclen(const uint8_t *buf) { return 3+((buf[1]&0x0f)<<8)+buf[2]; } static inline uint16_t tspid(const uint8_t *buf) { return ((buf[1]&0x1f)<<8)+buf[2]; } static inline int tspayload(const uint8_t *tsp) { if (!(tsp[3] & 0x10)) return 0; if (tsp[3] & 0x20) return (tsp[4] > 183) ? 0 : (183 - tsp[4]); return 184; } static inline int tspaystart(const uint8_t *tsp) { if (!(tsp[3]&0x10)) return 188; if (tsp[3]&0x20) return (tsp[4] >= 184) ? 188 : tsp[4]+5; return 4; } static uint32_t dvb_crc_table[256] = { 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec, 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4}; uint32_t dvb_crc32(uint8_t *data, int len) { int i; uint32_t crc=0xffffffff; for (i = 0; i < len; i++) crc = (crc << 8) ^ dvb_crc_table[((crc >> 24) ^ *data++) & 0xff]; return crc; } struct dvbf_pid { uint16_t pid; uint8_t cc; uint16_t bufp; uint16_t len; uint8_t buf[4096]; }; static inline void pidf_reset(struct dvbf_pid *pidf) { pidf->bufp = pidf->len = 0; } void dvbf_init_pid(struct dvbf_pid *pidf, uint16_t pid) { pidf->pid = pid; pidf->cc = 0xff; pidf_reset(pidf); } static inline void write_secbuf(struct dvbf_pid *p, uint8_t *tsp, int n) { memcpy(p->buf+p->bufp, tsp, n); p->bufp += n; } static inline int validcc(struct dvbf_pid *p, uint8_t *tsp) { uint8_t newcc; int valid; newcc = tsp[3] & 0x0f; if (p->cc == 0xff) valid=1; else valid = (((p->cc + 1) & 0x0f) == newcc) ? 1 : 0; p->cc = newcc; if (!valid) pidf_reset(p); return valid; } void dump(FILE *fp, uint8_t *b, int l) { int i, j; for (j = 0; j < l; j += 16, b += 16) { for (i = 0; i < 16; i++) if (i + j < l) fprintf(fp, "%02x ", b[i]); else fprintf(fp, " "); fprintf(fp, " | "); for (i = 0; i < 16; i++) if (i + j < l) fprintf(fp, "%c", (b[i] > 31 && b[i] < 127) ? b[i] : '.'); fprintf(fp, "\n"); } } static void pidf_section(struct dvbf_pid *p) { dump(stderr, p->buf, p->len); } static int proc_pidf(struct dvbf_pid *p, uint8_t *tsp) { int pusoff, todo, off; if (tspid(tsp) != p->pid) return 0; if (!(tsp[3] & 0x10)) //no payload return 0; todo = (tsp[3] & 0x20) ? // AF? ((tsp[4] > 183) ? 0 : (183 - tsp[4])) : 184; if (!todo) return 0; off = 188 - todo; pusoff = (tsp[1] & 0x40) ? tsp[off++] : todo; if (pusoff + off > 188) goto error; if (validcc(p, tsp) && pusoff && p->bufp) { int rlen = pusoff; if (p->len) { if (p->bufp + rlen > p->len) rlen = p->len - p->bufp; } else if (p->bufp + rlen > 4096) rlen = 4096 - p->bufp; write_secbuf(p, tsp + off, rlen); if (!p->len && p->bufp >= 3 && (p->len = seclen(p->buf)) > 4096) pidf_reset(p); else return 1;//pidf_section(p); } off += pusoff; while ((todo = 188 - off) > 0 && tsp[off] != 0xff) { pidf_reset(p); if (todo < 3 || (p->len = seclen(tsp+off)) > todo) { if (p->len > 4096) goto error; write_secbuf(p, tsp+off, todo); off+=todo; } else { write_secbuf(p, tsp+off, p->len); off+=p->len; return 2;//pidf_section(p); } } return 0; error: pidf_reset(p); return -1; }