/* * Multicasted IPTV Input * Copyright (C) 2007 Andreas Öman * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include "tvhead.h" #include "psi.h" #include "transports.h" #include "dvb/dvb_support.h" #include "tsdemux.h" #include "parsers.h" int psi_section_reassemble(psi_section_t *ps, uint8_t *data, int len, int start, int chkcrc) { int remain, a, tsize; if(start) ps->ps_offset = 0; if(ps->ps_offset < 0) return -1; remain = PSI_SECTION_SIZE - ps->ps_offset; a = FFMAX(0, FFMIN(remain, len)); memcpy(ps->ps_data + ps->ps_offset, data, a); ps->ps_offset += a; tsize = 3 + (((ps->ps_data[1] & 0xf) << 8) | ps->ps_data[2]); if(ps->ps_offset < tsize) return -1; if(chkcrc && psi_crc32(ps->ps_data, tsize)) return -1; ps->ps_offset = tsize - (chkcrc ? 4 : 0); return 0; } /** * PAT parser, from ISO 13818-1 */ int psi_parse_pat(th_transport_t *t, uint8_t *ptr, int len, pid_section_callback_t *pmt_callback) { uint16_t prognum; uint16_t pid; th_stream_t *st; lock_assert(&t->tht_stream_mutex); if(len < 5) return -1; ptr += 5; len -= 5; while(len >= 4) { prognum = ptr[0] << 8 | ptr[1]; pid = (ptr[2] & 0x1f) << 8 | ptr[3]; if(prognum != 0) { st = transport_add_stream(t, pid, SCT_PMT); st->st_section_docrc = 1; st->st_got_section = pmt_callback; } ptr += 4; len -= 4; } return 0; } /** * Append CRC */ static int psi_append_crc32(uint8_t *buf, int offset, int maxlen) { uint32_t crc; if(offset + 4 > maxlen) return -1; crc = psi_crc32(buf, offset); buf[offset + 0] = crc >> 24; buf[offset + 1] = crc >> 16; buf[offset + 2] = crc >> 8; buf[offset + 3] = crc; assert(psi_crc32(buf, offset + 4) == 0); return offset + 4; } /** * PAT generator */ int psi_build_pat(th_transport_t *t, uint8_t *buf, int maxlen, int pmtpid) { if(maxlen < 12) return -1; buf[0] = 0; buf[1] = 0xb0; /* reserved */ buf[2] = 12 + 4 - 3; /* Length */ buf[3] = 0x00; /* transport stream id */ buf[4] = 0x01; buf[5] = 0xc1; /* reserved + current_next_indicator + version */ buf[6] = 0; buf[7] = 0; buf[8] = 0; /* Program number, we only have one program */ buf[9] = 1; buf[10] = 0xe0 | (pmtpid >> 8); buf[11] = pmtpid; return psi_append_crc32(buf, 12, maxlen); } /** * PMT parser, from ISO 13818-1 and ETSI EN 300 468 */ int psi_parse_pmt(th_transport_t *t, uint8_t *ptr, int len, int chksvcid) { uint16_t pcr_pid, pid; uint8_t estype; int dllen; uint8_t dtag, dlen; uint16_t sid; streaming_component_type_t hts_stream_type; th_stream_t *st; char lang[4]; int frameduration; if(len < 9) return -1; lock_assert(&t->tht_stream_mutex); sid = ptr[0] << 8 | ptr[1]; pcr_pid = (ptr[5] & 0x1f) << 8 | ptr[6]; dllen = (ptr[7] & 0xf) << 8 | ptr[8]; t->tht_pcr_pid = pcr_pid; ptr += 9; len -= 9; if(chksvcid && sid != t->tht_dvb_service_id) return -1; while(dllen > 1) { dtag = ptr[0]; dlen = ptr[1]; len -= 2; ptr += 2; dllen -= 2; if(dlen > len) break; switch(dtag) { case DVB_DESC_CA: st = transport_add_stream(t, (ptr[2] & 0x1f) << 8 | ptr[3], SCT_CA); st->st_caid = (ptr[0] << 8) | ptr[1]; break; default: break; } len -= dlen; ptr += dlen; dllen -= dlen; } while(len >= 5) { estype = ptr[0]; pid = (ptr[1] & 0x1f) << 8 | ptr[2]; dllen = (ptr[3] & 0xf) << 8 | ptr[4]; ptr += 5; len -= 5; frameduration = 0; hts_stream_type = 0; switch(estype) { case 0x01: case 0x02: hts_stream_type = SCT_MPEG2VIDEO; break; case 0x03: case 0x04: case 0x81: hts_stream_type = SCT_MPEG2AUDIO; break; case 0x1b: hts_stream_type = SCT_H264; break; } memset(lang, 0, 4); while(dllen > 1) { dtag = ptr[0]; dlen = ptr[1]; len -= 2; ptr += 2; dllen -= 2; if(dlen > len) break; switch(dtag) { case DVB_DESC_VIDEO_STREAM: frameduration = mpeg2video_framedurations[(ptr[0] >> 3) & 0xf]; break; case DVB_DESC_LANGUAGE: memcpy(lang, ptr, 3); break; case DVB_DESC_TELETEXT: if(estype == 0x06) hts_stream_type = SCT_TELETEXT; break; case DVB_DESC_AC3: if(estype == 0x06 || estype == 0x81) hts_stream_type = SCT_AC3; break; default: break; } len -= dlen; ptr += dlen; dllen -= dlen; } if(hts_stream_type != 0) { st = transport_add_stream(t, pid, hts_stream_type); st->st_tb = (AVRational){1, 90000}; memcpy(st->st_sc.sc_lang, lang, 4); if(st->st_frame_duration == 0) st->st_frame_duration = frameduration; } } if(t->tht_pmt_seen == 0) t->tht_config_change(t); t->tht_pmt_seen = 1; return 0; } /** * PAT generator */ #if 0 int psi_build_pmt(th_muxer_t *tm, uint8_t *buf0, int maxlen, int pcrpid) { th_stream_t *st; th_muxstream_t *tms; int c, tlen, dlen, l; uint8_t *buf, *buf1; buf = buf0; if(maxlen < 12) return -1; buf[0] = 2; /* table id, always 2 */ buf[3] = 0x00; /* program id */ buf[4] = 0x01; buf[5] = 0xc1; /* current_next_indicator + version */ buf[6] = 0; buf[7] = 0; buf[8] = 0xe0 | (pcrpid >> 8); buf[9] = pcrpid; buf[10] = 0xf0; /* Program info length */ buf[11] = 0x00; /* We dont have any such things atm */ buf += 12; tlen = 12; LIST_FOREACH(tms, &tm->tm_streams, tms_muxer_link0) { st = tms->tms_stream; if(tms->tms_index == 0) continue; switch(st->st_type) { case SCT_MPEG2VIDEO: c = 0x02; break; case SCT_MPEG2AUDIO: c = 0x03; break; case SCT_H264: c = 0x1b; break; case SCT_AC3: c = 0x06; break; default: continue; } buf[0] = c; buf[1] = 0xe0 | (tms->tms_index >> 8); buf[2] = tms->tms_index; buf1 = &buf[3]; tlen += 5; buf += 5; dlen = 0; switch(st->st_type) { case SCT_AC3: buf[0] = DVB_DESC_AC3; buf[1] = 1; buf[2] = 0; /* XXX: generate real AC3 desc */ dlen = 3; break; default: break; } tlen += dlen; buf += dlen; buf1[0] = 0xf0 | (dlen >> 8); buf1[1] = dlen; } l = tlen - 3 + 4; buf0[1] = 0xb0 | (l >> 8); buf0[2] = l; return psi_append_crc32(buf0, tlen, maxlen); } #endif /* * CRC32 */ static uint32_t crc_tab[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 psi_crc32(uint8_t *data, size_t datalen) { uint32_t crc = 0xffffffff; while(datalen--) crc = (crc << 8) ^ crc_tab[((crc >> 24) ^ *data++) & 0xff]; return crc; } static struct strtab caidnametab[] = { { "Seca", 0x0100 }, { "CCETT", 0x0200 }, { "Deutsche Telecom", 0x0300 }, { "Eurodec", 0x0400 }, { "Viaccess", 0x0500 }, { "Irdeto", 0x0600 }, { "Irdeto", 0x0602 }, { "Irdeto", 0x0604 }, { "Jerroldgi", 0x0700 }, { "Matra", 0x0800 }, { "NDS", 0x0900 }, { "Nokia", 0x0A00 }, { "Conax", 0x0B00 }, { "NTL", 0x0C00 }, { "CryptoWorks", 0x0D00 }, { "PowerVu", 0x0E00 }, { "Sony", 0x0F00 }, { "Tandberg", 0x1000 }, { "Thompson", 0x1100 }, { "TV-Com", 0x1200 }, { "HPT", 0x1300 }, { "HRT", 0x1400 }, { "IBM", 0x1500 }, { "Nera", 0x1600 }, { "BetaCrypt", 0x1700 }, { "BetaCrypt", 0x1702 }, { "BetaCrypt", 0x1722 }, { "BetaCrypt", 0x1762 }, { "NagraVision", 0x1800 }, { "Titan", 0x1900 }, { "Telefonica", 0x2000 }, { "Stentor", 0x2100 }, { "Tadiran Scopus", 0x2200 }, { "BARCO AS", 0x2300 }, { "StarGuide", 0x2400 }, { "Mentor", 0x2500 }, { "EBU", 0x2600 }, { "GI", 0x4700 }, { "Telemann", 0x4800 } }; const char * psi_caid2name(uint16_t caid) { const char *s = val2str(caid, caidnametab); static char buf[20]; if(s != NULL) return s; snprintf(buf, sizeof(buf), "0x%x", caid); return buf; } /** * */ static struct strtab streamtypetab[] = { { "MPEG2VIDEO", SCT_MPEG2VIDEO }, { "MPEG2AUDIO", SCT_MPEG2AUDIO }, { "H264", SCT_H264 }, { "AC3", SCT_AC3 }, { "TELETEXT", SCT_TELETEXT }, { "SUBTITLES", SCT_SUBTITLES }, { "CA", SCT_CA }, { "PMT", SCT_PMT }, { "PAT", SCT_PAT }, }; const char * streaming_component_type2txt(streaming_component_type_t s) { return val2str(s, streamtypetab) ?: "INVALID"; } /** * Store transport settings into message */ void psi_save_transport_settings(htsmsg_t *m, th_transport_t *t) { streaming_pad_t *sp = &t->tht_streaming_pad; streaming_component_t *sc; th_stream_t *st; htsmsg_t *sub; htsmsg_add_u32(m, "pcr", t->tht_pcr_pid); htsmsg_add_u32(m, "disabled", !!t->tht_disabled); lock_assert(&t->tht_stream_mutex); LIST_FOREACH(sc, &sp->sp_components, sc_link) { st = (th_stream_t *)sc; sub = htsmsg_create(); htsmsg_add_u32(sub, "pid", st->st_pid); htsmsg_add_str(sub, "type", val2str(sc->sc_type, streamtypetab) ?: "?"); if(sc->sc_lang[0]) htsmsg_add_str(sub, "language", sc->sc_lang); if(sc->sc_type == SCT_CA) htsmsg_add_str(sub, "caid", psi_caid2name(st->st_caid)); if(st->st_frame_duration) htsmsg_add_u32(sub, "frameduration", st->st_frame_duration); htsmsg_add_msg(m, "stream", sub); } } /** * Load transport info from htsmsg */ void psi_load_transport_settings(htsmsg_t *m, th_transport_t *t) { htsmsg_t *c; htsmsg_field_t *f; uint32_t u32; th_stream_t *st; streaming_component_type_t type; const char *v; uint32_t pid, i; if(!htsmsg_get_u32(m, "pcr", &u32)) t->tht_pcr_pid = u32; if(!htsmsg_get_u32(m, "disabled", &u32)) t->tht_disabled = u32; HTSMSG_FOREACH(f, m) { if(strcmp(f->hmf_name, "stream")) continue; if((c = htsmsg_get_msg_by_field(f)) == NULL) continue; if((v = htsmsg_get_str(c, "type")) == NULL) continue; type = str2val(v, streamtypetab); if(type == -1) continue; if(htsmsg_get_u32(c, "pid", &pid)) continue; st = transport_add_stream(t, pid, type); st->st_tb = (AVRational){1, 90000}; if((v = htsmsg_get_str(c, "language")) != NULL) av_strlcpy(st->st_sc.sc_lang, v, 4); if(!htsmsg_get_u32(c, "frameduration", &u32)) st->st_frame_duration = u32; if((v = htsmsg_get_str(c, "caid")) != NULL) { i = str2val(v, caidnametab); st->st_caid = i < 0 ? strtol(v, NULL, 0) : i; } } }