diff options
Diffstat (limited to 'libdtv/libsi/si_parser.c')
| -rw-r--r-- | libdtv/libsi/si_parser.c | 881 |
1 files changed, 881 insertions, 0 deletions
diff --git a/libdtv/libsi/si_parser.c b/libdtv/libsi/si_parser.c new file mode 100644 index 0000000..acafa7b --- /dev/null +++ b/libdtv/libsi/si_parser.c @@ -0,0 +1,881 @@ +////////////////////////////////////////////////////////////// +/// /// +/// si_parser.c: main parsing functions of libsi /// +/// /// +////////////////////////////////////////////////////////////// + +// $Revision: 1.1 $ +// $Date: 2001/08/15 14:41:45 $ +// $Author: kls $ +// +// (C) 2001 Rolf Hakenes <hakenes@hippomi.de>, under the GNU GPL. +// +// libsi 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 2, or (at your option) +// any later version. +// +// libsi 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 may have received a copy of the GNU General Public License +// along with libsi; see the file COPYING. If not, write to the +// Free Software Foundation, Inc., 59 Temple Place - Suite 330, +// Boston, MA 02111-1307, USA. + +#include <stdio.h> +#include <math.h> +#include <time.h> + +#include "../liblx/liblx.h" +#include "libsi.h" +#include "si_tables.h" + + + +struct LIST *siParsePAT (u_char *Buffer) +{ + pat_t *Pat; + pat_prog_t *PatProgram; + u_char *Ptr; + u_int SectionLength; + int TransportStreamID; + int PatVersion; + struct Program *Program; + struct LIST *ProgramList = NULL; + + if (!Buffer) return NULL; + + Pat = (pat_t *) Buffer; Ptr = Buffer; + + if (Pat->table_id != TID_PAT) { +// fprintf (stderr, "PAT: wrong TID %d\n", Pat->table_id); + return NULL; + } + + SectionLength = HILO (Pat->section_length) + 3 - PAT_LEN - 4; + + if (crc32 (Ptr, HILO (Pat->section_length) + 3)) return (NULL); + + TransportStreamID = HILO (Pat->transport_stream_id); + PatVersion = Pat->version_number; + + Ptr += PAT_LEN; + + while (SectionLength > 0) + { + PatProgram = (pat_prog_t *) Ptr; + + CreateProgram (Program, HILO (PatProgram->program_number), + TransportStreamID, HILO (PatProgram->network_pid), PatVersion); + + if (!ProgramList) ProgramList = xNewList (NULL); + xAddTail (ProgramList, Program); + + SectionLength -= PAT_PROG_LEN; + Ptr += PAT_PROG_LEN; + } + + return (ProgramList); +} + + +struct Pid *siParsePMT (u_char *Buffer) +{ + pmt_t *Pmt; + pmt_info_t *PmtInfo; + u_char *Ptr; + u_int SectionLength, ProgramInfoLength, + StreamLength, LoopLength; + int ProgramID; + int PcrID; + int PmtVersion; + struct Pid *Pid; + struct PidInfo *PidInfo; + + if (!Buffer) return NULL; + + Pmt = (pmt_t *) Buffer; Ptr = Buffer; + + if (Pmt->table_id != TID_PMT) { +// fprintf (stderr, "PMT: wrong TID %d\n", Pmt->table_id); + return NULL; + } + + SectionLength = HILO (Pmt->section_length) + 3 - 4; + + if (crc32 (Ptr, HILO (Pmt->section_length) + 3)) return (NULL); + + ProgramInfoLength = HILO (Pmt->program_info_length); + StreamLength = SectionLength - ProgramInfoLength - PMT_LEN; + + ProgramID = HILO (Pmt->program_number); + PmtVersion = Pmt->version_number; + PcrID = HILO (Pmt->PCR_PID); + + Ptr += PMT_LEN; + + CreatePid (Pid, ProgramID, PcrID, PmtVersion); + + siParseDescriptors (Pid->Descriptors, Ptr, ProgramInfoLength, Pmt->table_id); + + Ptr += ProgramInfoLength; + + while (StreamLength > 0) + { + PmtInfo = (pmt_info_t *) Ptr; + + CreatePidInfo (PidInfo, PmtInfo->stream_type, + HILO (PmtInfo->elementary_PID)); + + LoopLength = HILO (PmtInfo->ES_info_length); + Ptr += PMT_INFO_LEN; + + siParseDescriptors (PidInfo->Descriptors, Ptr, LoopLength, Pmt->table_id); + + xAddTail (Pid->InfoList, PidInfo); + + StreamLength -= LoopLength + PMT_INFO_LEN; + Ptr += LoopLength; + } + + return (Pid); +} + + +struct LIST *siParseSDT (u_char *Buffer) +{ + sdt_t *Sdt; + sdt_descr_t *SdtDescriptor; + u_char *Ptr; + u_int SectionLength, LoopLength; + int TransportStreamID; + int SdtVersion; + int OriginalNetworkID; + struct Service *Service; + struct LIST *ServiceList = NULL; + + if (!Buffer) return NULL; + + Sdt = (sdt_t *) Buffer; Ptr = Buffer; + + if (Sdt->table_id != TID_SDT_ACT && Sdt->table_id != TID_SDT_OTH) { +// fprintf (stderr, "SDT: wrong TID %d\n", Sdt->table_id); + return NULL; + } + + SectionLength = HILO (Sdt->section_length) + 3 - SDT_LEN - 4; + + if (crc32 (Ptr, HILO (Sdt->section_length) + 3)) return (NULL); + + TransportStreamID = HILO (Sdt->transport_stream_id); + SdtVersion = Sdt->version_number; + OriginalNetworkID = HILO (Sdt->original_network_id); + + Ptr += SDT_LEN; + + while (SectionLength > 0) + { + SdtDescriptor = (sdt_descr_t *) Ptr; + + CreateService (Service, HILO (SdtDescriptor->service_id), + TransportStreamID, OriginalNetworkID, SdtVersion, + SdtDescriptor->free_ca_mode ? CONDITIONAL_ACCESS : FREE_TO_AIR); + + switch (SdtDescriptor->running_status) + { + case 0x01: + SetRunningStatus (Service->Status, RUNNING_STATUS_NOT_RUNNING); + break; + + case 0x02: + SetRunningStatus (Service->Status, RUNNING_STATUS_AWAITING); + break; + + case 0x03: + SetRunningStatus (Service->Status, RUNNING_STATUS_PAUSING); + break; + + case 0x04: + default: + SetRunningStatus (Service->Status, RUNNING_STATUS_RUNNING); + break; + } + if (SdtDescriptor->eit_schedule_flag) + SetScheduleFlag (Service->Status); + if (SdtDescriptor->eit_present_following_flag) + SetPresentFollowing (Service->Status); + + LoopLength = HILO (SdtDescriptor->descriptors_loop_length); + Ptr += SDT_DESCR_LEN; + + siParseDescriptors (Service->Descriptors, Ptr, LoopLength, Sdt->table_id); + + if (!ServiceList) ServiceList = xNewList (NULL); + xAddTail (ServiceList, Service); + + SectionLength -= LoopLength + SDT_DESCR_LEN; + Ptr += LoopLength; + } + + return (ServiceList); +} + + +struct LIST *siParseEIT (u_char *Buffer) +{ + eit_t *Eit; + eit_event_t *EitEvent; + u_char *Ptr; + u_int SectionLength, LoopLength; + int ServiceID; + int EitVersion; + int TransportStreamID; + int OriginalNetworkID; + struct Event *Event; + struct LIST *EventList = NULL; + + if (!Buffer) return NULL; + + Eit = (eit_t *) Buffer; Ptr = Buffer; + + if (Eit->table_id != TID_EIT_ACT && Eit->table_id != TID_EIT_OTH && + !(Eit->table_id >= TID_EIT_ACT_SCH && + Eit->table_id <= TID_EIT_ACT_SCH + 0x0F) && + !(Eit->table_id >= TID_EIT_OTH_SCH && + Eit->table_id <= TID_EIT_OTH_SCH + 0x0F)) { +// fprintf (stderr, "EIT: wrong TID %d\n", Eit->table_id); + return NULL; + } + + SectionLength = HILO (Eit->section_length) + 3 - EIT_LEN - 4; + + if (crc32 (Ptr, HILO (Eit->section_length) + 3)) return (NULL); + + ServiceID = HILO (Eit->service_id); + TransportStreamID = HILO (Eit->transport_stream_id); + EitVersion = Eit->version_number; + OriginalNetworkID = HILO (Eit->original_network_id); + + Ptr += EIT_LEN; + + while (SectionLength > 0) + { + struct tm thisTime; + int year, month, day; + double mjd; + + EitEvent = (eit_event_t *) Ptr; + + CreateEvent (Event, HILO (EitEvent->event_id), ServiceID, + TransportStreamID, OriginalNetworkID, EitVersion, + EitEvent->free_ca_mode ? CONDITIONAL_ACCESS : FREE_TO_AIR); + + switch (EitEvent->running_status) + { + case 0x01: + SetRunningStatus (Event->Status, RUNNING_STATUS_NOT_RUNNING); + break; + + case 0x02: + SetRunningStatus (Event->Status, RUNNING_STATUS_AWAITING); + break; + + case 0x03: + SetRunningStatus (Event->Status, RUNNING_STATUS_PAUSING); + break; + + case 0x04: + default: + SetRunningStatus (Event->Status, RUNNING_STATUS_RUNNING); + break; + } + Event->StartTime = MjdToEpochTime (EitEvent->mjd) + + BcdTimeToSeconds (EitEvent->start_time); + Event->Duration = BcdTimeToSeconds (EitEvent->duration); + + LoopLength = HILO (EitEvent->descriptors_loop_length); + Ptr += EIT_EVENT_LEN; + + siParseDescriptors (Event->Descriptors, Ptr, LoopLength, Eit->table_id); + + if (!EventList) EventList = xNewList (NULL); + xAddTail (EventList, Event); + + SectionLength -= LoopLength + EIT_EVENT_LEN; + Ptr += LoopLength; + } + + return (EventList); +} + + +time_t siParseTDT (u_char *Buffer) +{ + tdt_t *Tdt; + u_char *Ptr; + u_int SectionLength; + int TdtVersion; + time_t CurrentTime; + + if (!Buffer) return 0; + + Tdt = (tdt_t *) Buffer; Ptr = Buffer; + + if (Tdt->table_id != TID_TDT) { +// fprintf (stderr, "TDT: wrong TID %d\n", Tdt->table_id); + return 0; + } + + SectionLength = HILO (Tdt->section_length) + 3; /* no CRC ?! */ + + CurrentTime = MjdToEpochTime (Tdt->utc_mjd) + + BcdTimeToSeconds (Tdt->utc_time); + + return (CurrentTime); +} + + +void siParseDescriptors (struct LIST *Descriptors, u_char *Buffer, + u_int Length, u_char TableID) +{ + u_int DescriptorLength; + u_char *Ptr; + + DescriptorLength = 0; + Ptr = Buffer; + + while (DescriptorLength < Length) + { + switch (TableID) + { + case TID_NIT_ACT: case TID_NIT_OTH: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_NW_NAME: + case DESCR_SERVICE_LIST: + case DESCR_STUFFING: + case DESCR_SAT_DEL_SYS: + case DESCR_CABLE_DEL_SYS: + case DESCR_LINKAGE: + case DESCR_TERR_DEL_SYS: + case DESCR_ML_NW_NAME: + case DESCR_PRIV_DATA_SPEC: + case DESCR_CELL_LIST: + case DESCR_CELL_FREQ_LINK: + case DESCR_ANNOUNCEMENT_SUPPORT: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /* fprintf (stderr, "forbidden descriptor 0x%x in NIT\n", + GetDescriptorTag(Ptr));*/ + break; + } + break; + + case TID_BAT: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_SERVICE_LIST: + case DESCR_STUFFING: + case DESCR_BOUQUET_NAME: + case DESCR_SERVICE: + case DESCR_COUNTRY_AVAIL: + case DESCR_LINKAGE: + case DESCR_CA_IDENT: + case DESCR_ML_BQ_NAME: + case DESCR_PRIV_DATA_SPEC: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /*fprintf (stderr, "forbidden descriptor 0x%x in BAT\n", + GetDescriptorTag(Ptr));*/ + break; + } + break; + + case TID_SDT_ACT: case TID_SDT_OTH: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_STUFFING: + case DESCR_BOUQUET_NAME: + case DESCR_SERVICE: + case DESCR_COUNTRY_AVAIL: + case DESCR_LINKAGE: + case DESCR_NVOD_REF: + case DESCR_TIME_SHIFTED_SERVICE: + case DESCR_MOSAIC: + case DESCR_CA_IDENT: + case DESCR_TELEPHONE: + case DESCR_ML_SERVICE_NAME: + case DESCR_PRIV_DATA_SPEC: + case DESCR_DATA_BROADCAST: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /* fprintf (stderr, "forbidden descriptor 0x%x in SDT\n", + GetDescriptorTag(Ptr)); */ + break; + } + break; + + case TID_EIT_ACT: case TID_EIT_OTH: + case TID_EIT_ACT_SCH: case TID_EIT_OTH_SCH: + case TID_EIT_ACT_SCH+1: case TID_EIT_OTH_SCH+1: + case TID_EIT_ACT_SCH+2: case TID_EIT_OTH_SCH+2: + case TID_EIT_ACT_SCH+3: case TID_EIT_OTH_SCH+3: + case TID_EIT_ACT_SCH+4: case TID_EIT_OTH_SCH+4: + case TID_EIT_ACT_SCH+5: case TID_EIT_OTH_SCH+5: + case TID_EIT_ACT_SCH+6: case TID_EIT_OTH_SCH+6: + case TID_EIT_ACT_SCH+7: case TID_EIT_OTH_SCH+7: + case TID_EIT_ACT_SCH+8: case TID_EIT_OTH_SCH+8: + case TID_EIT_ACT_SCH+9: case TID_EIT_OTH_SCH+9: + case TID_EIT_ACT_SCH+10: case TID_EIT_OTH_SCH+10: + case TID_EIT_ACT_SCH+11: case TID_EIT_OTH_SCH+11: + case TID_EIT_ACT_SCH+12: case TID_EIT_OTH_SCH+12: + case TID_EIT_ACT_SCH+13: case TID_EIT_OTH_SCH+13: + case TID_EIT_ACT_SCH+14: case TID_EIT_OTH_SCH+14: + case TID_EIT_ACT_SCH+15: case TID_EIT_OTH_SCH+15: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_STUFFING: + case DESCR_LINKAGE: + case DESCR_SHORT_EVENT: + case DESCR_EXTENDED_EVENT: + case DESCR_TIME_SHIFTED_EVENT: + case DESCR_COMPONENT: + case DESCR_CA_IDENT: + case DESCR_CONTENT: + case DESCR_PARENTAL_RATING: + case DESCR_TELEPHONE: + case DESCR_ML_COMPONENT: + case DESCR_PRIV_DATA_SPEC: + case DESCR_SHORT_SMOOTH_BUF: + case DESCR_DATA_BROADCAST: + case DESCR_PDC: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /*fprintf (stderr, "forbidden descriptor 0x%x in EIT\n", + GetDescriptorTag(Ptr));*/ + break; + } + break; + + case TID_TOT: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_LOCAL_TIME_OFF: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /*fprintf (stderr, "forbidden descriptor 0x%x in TOT\n", + GetDescriptorTag(Ptr));*/ + break; + } + break; + + case TID_PMT: + switch (GetDescriptorTag(Ptr)) + { + case DESCR_VBI_DATA: + case DESCR_VBI_TELETEXT: + case DESCR_MOSAIC: + case DESCR_STREAM_ID: + case DESCR_TELETEXT: + case DESCR_SUBTITLING: + case DESCR_PRIV_DATA_SPEC: + case DESCR_SERVICE_MOVE: + case DESCR_CA_SYSTEM: + case DESCR_DATA_BROADCAST_ID: + case DESCR_AC3: + case DESCR_ANCILLARY_DATA: + case DESCR_VIDEO_STREAM: + case DESCR_AUDIO_STREAM: + case DESCR_HIERARCHY: + case DESCR_REGISTRATION: + case DESCR_DATA_STREAM_ALIGN: + case DESCR_TARGET_BACKGRID: + case DESCR_VIDEO_WINDOW: + case DESCR_CA: + case DESCR_ISO_639_LANGUAGE: + case DESCR_SYSTEM_CLOCK: + case DESCR_MULTIPLEX_BUFFER_UTIL: + case DESCR_COPYRIGHT: + case DESCR_MAXIMUM_BITRATE: + siParseDescriptor (Descriptors, Ptr); + break; + + default: + /* fprintf (stderr, "forbidden descriptor 0x%x in PMT\n", + GetDescriptorTag(Ptr)); */ + break; + } + break; + + default: + fprintf (stderr, "descriptor 0x%x in unsupported table 0x%x\n", + GetDescriptorTag(Ptr), TableID); + break; + } + DescriptorLength += GetDescriptorLength (Ptr); + Ptr += GetDescriptorLength (Ptr); + } + return; +} + + +void siParseDescriptor (struct LIST *Descriptors, u_char *Buffer) +{ + struct NODE *Descriptor = NULL; + char *Text , *Text2; + u_char *Ptr; + int Length, i; + + if (!Descriptors || !Buffer) return; + + Ptr = Buffer; + + switch (GetDescriptorTag(Buffer)) + { + case DESCR_ANCILLARY_DATA: + CreateAncillaryDataDescriptor (Descriptor, + CastAncillaryDataDescriptor(Buffer)->ancillary_data_identifier); + break; + + case DESCR_BOUQUET_NAME: + Text = siGetDescriptorText (Buffer + DESCR_BOUQUET_NAME_LEN, + GetDescriptorLength (Buffer) - DESCR_BOUQUET_NAME_LEN); + CreateBouquetNameDescriptor (Descriptor, Text); +// xMemFree (Text); + break; + + case DESCR_COMPONENT: + Text = siGetDescriptorText (Buffer + DESCR_COMPONENT_LEN, + GetDescriptorLength (Buffer) - DESCR_COMPONENT_LEN); + CreateComponentDescriptor (Descriptor, + CastComponentDescriptor(Buffer)->stream_content, + CastComponentDescriptor(Buffer)->component_type, + CastComponentDescriptor(Buffer)->component_tag, + CastComponentDescriptor(Buffer)->lang_code1, + CastComponentDescriptor(Buffer)->lang_code2, + CastComponentDescriptor(Buffer)->lang_code3, Text); +// xMemFree (Text); + break; + + case DESCR_SERVICE: + Text = siGetDescriptorText (Buffer + DESCR_SERVICE_LEN, + CastServiceDescriptor(Buffer)->provider_name_length); + Text2 = siGetDescriptorText (Buffer + DESCR_SERVICE_LEN + + CastServiceDescriptor(Buffer)->provider_name_length + 1, + *((u_char *)(Buffer + DESCR_SERVICE_LEN + + CastServiceDescriptor(Buffer)->provider_name_length))); + CreateServiceDescriptor (Descriptor, + CastServiceDescriptor(Buffer)->service_type, Text, Text2); +// xMemFree (Text2); + break; + + case DESCR_COUNTRY_AVAIL: + CreateCountryAvailabilityDescriptor (Descriptor, + CastCountryAvailabilityDescriptor(Buffer)->country_availability_flag); + Length = GetDescriptorLength (Buffer) - DESCR_COUNTRY_AVAILABILITY_LEN; + Ptr += DESCR_COUNTRY_AVAILABILITY_LEN; + while (Length > 0) + { AddCountryAvailabilityCode(Descriptor, + Ptr[0], Ptr[1], Ptr[2]); Ptr += 3; Length -= 3; } + break; + + case DESCR_SHORT_EVENT: + Text = siGetDescriptorText (Buffer + DESCR_SHORT_EVENT_LEN, + CastShortEventDescriptor(Buffer)->event_name_length); + Text2 = siGetDescriptorText (Buffer + DESCR_SHORT_EVENT_LEN + + CastShortEventDescriptor(Buffer)->event_name_length + 1, + *((u_char *)(Buffer + DESCR_SHORT_EVENT_LEN + + CastShortEventDescriptor(Buffer)->event_name_length))); + CreateShortEventDescriptor (Descriptor, Text, + CastShortEventDescriptor(Buffer)->lang_code1, + CastShortEventDescriptor(Buffer)->lang_code2, + CastShortEventDescriptor(Buffer)->lang_code3, Text2); +// xMemFree (Text); + break; + + case DESCR_EXTENDED_EVENT: + Text = siGetDescriptorText (Buffer + DESCR_EXTENDED_EVENT_LEN + + CastExtendedEventDescriptor(Buffer)->length_of_items + 1, + *((u_char *)(Buffer + DESCR_EXTENDED_EVENT_LEN + + CastExtendedEventDescriptor(Buffer)->length_of_items))); + CreateExtendedEventDescriptor (Descriptor, + CastExtendedEventDescriptor(Buffer)->descriptor_number, + CastExtendedEventDescriptor(Buffer)->last_descriptor_number, + CastExtendedEventDescriptor(Buffer)->lang_code1, + CastExtendedEventDescriptor(Buffer)->lang_code2, + CastExtendedEventDescriptor(Buffer)->lang_code3, Text); +// xMemFree (Text); + Length = CastExtendedEventDescriptor(Buffer)->length_of_items; + Ptr += DESCR_EXTENDED_EVENT_LEN; + while (Length > 0) + { + Text = siGetDescriptorText (Ptr + ITEM_EXTENDED_EVENT_LEN, + CastExtendedEventItem(Ptr)->item_description_length); + Text2 = siGetDescriptorText (Ptr + ITEM_EXTENDED_EVENT_LEN + + CastExtendedEventItem(Ptr)->item_description_length + 1, + *((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN + + CastExtendedEventItem(Ptr)->item_description_length))); + AddExtendedEventItem (Descriptor, Text2, Text); +// xMemFree (Text2); + Length -= ITEM_EXTENDED_EVENT_LEN + CastExtendedEventItem(Ptr)->item_description_length + + *((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN + + CastExtendedEventItem(Ptr)->item_description_length)) + 1; + Ptr += ITEM_EXTENDED_EVENT_LEN + CastExtendedEventItem(Ptr)->item_description_length + + *((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN + + CastExtendedEventItem(Ptr)->item_description_length)) + 1; + } + break; + + case DESCR_CA_IDENT: + CreateCaIdentifierDescriptor (Descriptor, + (GetDescriptorLength(Buffer) - DESCR_CA_IDENTIFIER_LEN) / 2); + Length = GetDescriptorLength (Buffer) - DESCR_CA_IDENTIFIER_LEN; + Ptr += DESCR_CA_IDENTIFIER_LEN; i = 0; + while (Length > 0) + { SetCaIdentifierID(Descriptor, i, *((u_short *) Ptr)); + Length -= 2; Ptr += 2; i++; } + break; + + case DESCR_CONTENT: + CreateContentDescriptor (Descriptor, + (GetDescriptorLength(Buffer) - DESCR_CONTENT_LEN) / 2); + Length = GetDescriptorLength (Buffer) - DESCR_CONTENT_LEN; + Ptr += DESCR_CONTENT_LEN; i = 0; + while (Length > 0) + { SetContentID(Descriptor, i, CastContentNibble(Ptr)->content_nibble_level_1, + CastContentNibble(Ptr)->content_nibble_level_2, + CastContentNibble(Ptr)->user_nibble_1, + CastContentNibble(Ptr)->user_nibble_2); + Length -= 2; Ptr += 2; i++; } + break; + + case DESCR_STUFFING: + /* intentionally ignored */ + break; + + case DESCR_PARENTAL_RATING: + CreateParentalRatingDescriptor (Descriptor); + Length = GetDescriptorLength (Buffer) - DESCR_PARENTAL_RATING_LEN; + Ptr += DESCR_PARENTAL_RATING_LEN; i = 0; + while (Length > 0) + { AddParentalRating (Descriptor, CastParentalRating(Ptr)->lang_code1, + CastParentalRating(Ptr)->lang_code2, CastParentalRating(Ptr)->lang_code3, + CastParentalRating(Ptr)->rating); + Length -= PARENTAL_RATING_LEN; Ptr += PARENTAL_RATING_LEN; i++; } + break; + + case DESCR_NVOD_REF: + CreateNvodReferenceDescriptor (Descriptor); + Length = GetDescriptorLength (Buffer) - DESCR_NVOD_REFERENCE_LEN; + Ptr += DESCR_NVOD_REFERENCE_LEN; + while (Length > 0) + { + AddNvodReferenceItem (Descriptor, + HILO (CastNvodReferenceItem(Ptr)->transport_stream_id), + HILO (CastNvodReferenceItem(Ptr)->original_network_id), + HILO (CastNvodReferenceItem(Ptr)->service_id)); + Length -= ITEM_NVOD_REFERENCE_LEN; + Ptr += ITEM_NVOD_REFERENCE_LEN; + } + break; + + case DESCR_TIME_SHIFTED_SERVICE: + CreateTimeShiftedServiceDescriptor (Descriptor, + HILO (CastTimeShiftedServiceDescriptor(Ptr)->reference_service_id)); + break; + + case DESCR_TIME_SHIFTED_EVENT: + CreateTimeShiftedEventDescriptor (Descriptor, + HILO (CastTimeShiftedEventDescriptor(Ptr)->reference_service_id), + HILO (CastTimeShiftedEventDescriptor(Ptr)->reference_event_id)); + break; + + case DESCR_ISO_639_LANGUAGE: + CreateIso639LanguageDescriptor (Descriptor, + CastIso639LanguageDescriptor(Buffer)->lang_code1, + CastIso639LanguageDescriptor(Buffer)->lang_code2, + CastIso639LanguageDescriptor(Buffer)->lang_code3); + break; + + case DESCR_STREAM_ID: + CreateStreamIdentifierDescriptor (Descriptor, + CastStreamIdentifierDescriptor(Ptr)->component_tag); + break; + + case DESCR_LINKAGE: + CreateLinkageDescriptor (Descriptor, + HILO (CastLinkageDescriptor(Ptr)->transport_stream_id), + HILO (CastLinkageDescriptor(Ptr)->original_network_id), + HILO (CastLinkageDescriptor(Ptr)->service_id), + CastLinkageDescriptor(Ptr)->linkage_type, + GetDescriptorLength (Ptr) - DESCR_LINKAGE_LEN, + Ptr + DESCR_LINKAGE_LEN); + break; + + case DESCR_VIDEO_STREAM: + case DESCR_AUDIO_STREAM: + case DESCR_HIERARCHY: + case DESCR_REGISTRATION: + case DESCR_DATA_STREAM_ALIGN: + case DESCR_TARGET_BACKGRID: + case DESCR_VIDEO_WINDOW: + case DESCR_CA: + case DESCR_SYSTEM_CLOCK: + case DESCR_MULTIPLEX_BUFFER_UTIL: + case DESCR_COPYRIGHT: + case DESCR_MAXIMUM_BITRATE: + case DESCR_PRIVATE_DATA_IND: + case DESCR_SMOOTHING_BUFFER: + case DESCR_STD: + case DESCR_IBP: + case DESCR_NW_NAME: + case DESCR_SERVICE_LIST: + case DESCR_SAT_DEL_SYS: + case DESCR_CABLE_DEL_SYS: + case DESCR_VBI_DATA: + case DESCR_VBI_TELETEXT: + case DESCR_MOSAIC: + case DESCR_TELETEXT: + case DESCR_TELEPHONE: + case DESCR_LOCAL_TIME_OFF: + case DESCR_SUBTITLING: + case DESCR_TERR_DEL_SYS: + case DESCR_ML_NW_NAME: + case DESCR_ML_BQ_NAME: + case DESCR_ML_SERVICE_NAME: + case DESCR_ML_COMPONENT: + case DESCR_PRIV_DATA_SPEC: + case DESCR_SERVICE_MOVE: + case DESCR_SHORT_SMOOTH_BUF: + case DESCR_FREQUENCY_LIST: + case DESCR_PARTIAL_TP_STREAM: + case DESCR_DATA_BROADCAST: + case DESCR_CA_SYSTEM: + case DESCR_DATA_BROADCAST_ID: + case DESCR_TRANSPORT_STREAM: + case DESCR_DSNG: + case DESCR_PDC: + case DESCR_AC3: + case DESCR_CELL_LIST: + case DESCR_CELL_FREQ_LINK: + case DESCR_ANNOUNCEMENT_SUPPORT: + default: + /* fprintf (stderr, "unsupported descriptor 0x%x\n", + GetDescriptorTag(Buffer)); */ + break; + } + if (Descriptor) xAddTail (Descriptors, Descriptor); + return; +} + + +/* + * ToDo: ETSI conformal text definition + */ +char *siGetDescriptorText (u_char *Buffer, u_int Length) +{ + char *tmp, *result; + int i; + + if (*Buffer == 0x05 || (*Buffer >= 0x20 && *Buffer <= 0xff)) + { + xMemAlloc (Length+1, &result); + tmp = result; + for (i = 0; i < Length; i++) + { + if (*Buffer == 0) break; + + if ((*Buffer >= ' ' && *Buffer <= '~') || + (*Buffer >= 0xa0 && *Buffer <= 0xff)) *tmp++ = *Buffer++; + else Buffer++; + } + *tmp = '\0'; + } + else + { + switch (*Buffer) + { + case 0x01: result = xSetText ("Coding according to character table 1"); break; + case 0x02: result = xSetText ("Coding according to character table 2"); break; + case 0x03: result = xSetText ("Coding according to character table 3"); break; + case 0x04: result = xSetText ("Coding according to character table 4"); break; + case 0x10: result = xSetText ("Coding according to ISO/IEC 8859"); break; + case 0x11: result = xSetText ("Coding according to ISO/IEC 10646"); break; + case 0x12: result = xSetText ("Coding according to KSC 5601"); break; + default: result = xSetText ("Unknown coding"); break; + } + } + + return (result); +} + +// CRC32 lookup table for polynomial 0x04c11db7 + +static u_long 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}; + +u_long crc32 (char *data, int len) +{ + register int i; + u_long crc = 0xffffffff; + + for (i=0; i<len; i++) + crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *data++) & 0xff]; + + return crc; +} |