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vdr/libdtv/libsi/si_parser.c

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//////////////////////////////////////////////////////////////
/// ///
/// si_parser.c: main parsing functions of libsi ///
/// ///
//////////////////////////////////////////////////////////////
// $Revision: 1.8 $
// $Date: 2003/02/04 18:45:35 $
// $Author: hakenes $
//
// (C) 2001-03 Rolf Hakenes <hakenes@hippomi.de>, under the
// GNU GPL with contribution of Oleg Assovski,
// www.satmania.com
//
// 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 <string.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;
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 LIST *siParseCAT (u_char *Buffer)
{
cat_t *Cat;
u_char *Ptr;
int SectionLength;
int TransportStreamID;
int CatVersion;
struct Descriptor *Descriptor;
struct LIST *DescriptorList = NULL;
if (!Buffer) return NULL;
Cat = (cat_t *) Buffer; Ptr = Buffer;
if (Cat->table_id != TID_CAT) {
// fprintf (stderr, "CAT: wrong TID %d\n", Cat->table_id);
return NULL;
}
SectionLength = HILO (Cat->section_length) + 3 - CAT_LEN - 4;
if (crc32 (Ptr, HILO (Cat->section_length) + 3)) return (NULL);
CatVersion = Cat->version_number;
Ptr += CAT_LEN;
if (SectionLength >= 0)
{
DescriptorList = xNewList (NULL);
siParseDescriptors (DescriptorList, Ptr, SectionLength, Cat->table_id);
}
return (DescriptorList);
}
struct Pid *siParsePMT (u_char *Buffer)
{
pmt_t *Pmt;
pmt_info_t *PmtInfo;
u_char *Ptr;
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);
if (StreamLength >= 0) 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 *siParseNIT (u_char *Buffer)
{
nit_t *Nit;
nit_mid_t *NitMid;
nit_ts_t *TSDesc;
u_char *Ptr;
int SectionLength, LoopLength, Loop2Length;
int TransportStreamID;
int NitVersion;
int NetworkID;
struct TransportStream *TransportStream;
struct LIST *TSList = NULL;
struct LIST *Networks;
struct NetworkInfo *Network;
if (!Buffer) return NULL;
Nit = (nit_t *) Buffer;
Ptr = Buffer;
if (Nit->table_id != TID_NIT_ACT && Nit->table_id != TID_NIT_OTH && Nit->table_id != TID_BAT) {
return NULL;
}
SectionLength = HILO (Nit->section_length) + 3 - NIT_LEN - 4;
if (crc32 (Ptr, HILO (Nit->section_length) + 3)) return (NULL);
NitVersion = Nit->version_number;
NetworkID = HILO (Nit->network_id);
if (NetworkID == 65535)
NetworkID = 0;
CreateNetworkInfo (Network, NetworkID);
Networks = xNewList (NULL);
xAddTail (Networks, Network);
Ptr += NIT_LEN;
LoopLength = HILO (Nit->network_descriptor_length);
// fprintf (stderr, "table 0x%X, SectionLen = %d, LoopLen = %d\n",
// Nit->table_id, SectionLength, LoopLength);
if (LoopLength > SectionLength - SDT_DESCR_LEN)
return (Networks);
if (LoopLength <= SectionLength) {
if (SectionLength >= 0) siParseDescriptors (Network->Descriptors, Ptr, LoopLength, Nit->table_id);
SectionLength -= LoopLength;
Ptr += LoopLength;
NitMid = (nit_mid_t *) Ptr;
LoopLength = HILO (NitMid->transport_stream_loop_length);
// fprintf (stderr, "table 0x%X, TS LoopLen = %d\n",
// Nit->table_id, LoopLength);
if ((SectionLength > 0) && (LoopLength <= SectionLength)) {
SectionLength -= SIZE_NIT_MID;
Ptr += SIZE_NIT_MID;
while (LoopLength > 0) {
TSDesc = (nit_ts_t *) Ptr;
CreateTransportStream (TransportStream, HILO(TSDesc->transport_stream_id), HILO(TSDesc->original_network_id));
if (TransportStream->TransportStreamID == 65535)
TransportStream->TransportStreamID = 0;
if (TransportStream->OriginalNetworkID == 65535)
TransportStream->OriginalNetworkID = 0;
Loop2Length = HILO (TSDesc->transport_descriptors_length);
// fprintf (stderr, "table 0x%X, TSdesc LoopLen = %d\n",
// Nit->table_id, Loop2Length);
Ptr += NIT_TS_LEN;
if (Loop2Length <= LoopLength) {
if (LoopLength >= 0) siParseDescriptors (TransportStream->Descriptors, Ptr, Loop2Length, Nit->table_id);
}
if (!Network->TransportStreams)
Network->TransportStreams = xNewList (NULL);
xAddTail (Network->TransportStreams, TransportStream);
LoopLength -= Loop2Length + NIT_TS_LEN;
SectionLength -= Loop2Length + NIT_TS_LEN;
Ptr += Loop2Length;
}
}
}
return (Networks);
}
struct LIST *siParseSDT (u_char *Buffer)
{
sdt_t *Sdt;
sdt_descr_t *SdtDescriptor;
u_char *Ptr;
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);
if (LoopLength > SectionLength - SDT_DESCR_LEN)
return (ServiceList);
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;
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);
if (LoopLength > SectionLength - EIT_EVENT_LEN)
return (EventList);
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;
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);
}
struct Tot *siParseTOT (u_char *Buffer)
{
tot_t *Tot;
u_char *Ptr;
int SectionLength, LoopLength;
struct Tot *table;
time_t CurrentTime;
if (!Buffer) return NULL;
Tot = (tot_t *) Buffer;
Ptr = Buffer;
if (Tot->table_id != TID_TOT) {
return NULL;
}
if (crc32 (Ptr, HILO (Tot->section_length) + 3)) return (NULL);
// SectionLength = HILO (Tot->section_length) + 3 - TOT_LEN - 4;
CurrentTime = MjdToEpochTime (Tot->utc_mjd) +
BcdTimeToSeconds (Tot->utc_time);
LoopLength = HILO (Tot->descriptors_loop_length);
if (!LoopLength)
return NULL;
CreateTot (table, CurrentTime);
Ptr += TOT_LEN;
siParseDescriptors (table->Descriptors, Ptr, LoopLength, Tot->table_id);
// fprintf (stderr, "TOT Bias: %d\n", table->Bias);
return (table);
}
static u_char TempTableID = 0;
void siParseDescriptors (struct LIST *Descriptors, u_char *Buffer,
int Length, u_char TableID)
{
int DescriptorLength;
u_char *Ptr;
DescriptorLength = 0;
Ptr = Buffer;
TempTableID = TableID;
while (DescriptorLength < Length)
{
if ((GetDescriptorLength (Ptr) > Length - DescriptorLength) ||
(GetDescriptorLength (Ptr) <= 0)) return;
switch (TableID)
{
case TID_NIT_ACT: case TID_NIT_OTH:
switch (GetDescriptorTag(Ptr))
{
case DESCR_SAT_DEL_SYS:
case DESCR_CABLE_DEL_SYS:
case DESCR_SERVICE_LIST:
case DESCR_PRIV_DATA_SPEC:
// fprintf (stderr, "Got descriptor with tag = 0x%X\n", GetDescriptorTag(Ptr));
// siDumpDescriptor (Ptr);
case DESCR_NW_NAME:
case DESCR_STUFFING:
case DESCR_LINKAGE:
case DESCR_TERR_DEL_SYS:
case DESCR_ML_NW_NAME:
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:
// fprintf (stderr, "Got descriptor with tag = 0x%X\n", GetDescriptorTag(Ptr));
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;
case TID_CAT:
switch (GetDescriptorTag(Ptr))
{
case DESCR_CA_SYSTEM:
case DESCR_CA:
case DESCR_CA_IDENT:
siParseDescriptor (Descriptors, Ptr);
break;
default:
// fprintf (stderr, "forbidden descriptor 0x%x in CAT\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;
// fprintf (stderr, "Got descriptor with tag = 0x%X\n", GetDescriptorTag(Buffer));
switch (GetDescriptorTag(Buffer))
{
case DESCR_ANCILLARY_DATA:
CreateAncillaryDataDescriptor (Descriptor,
CastAncillaryDataDescriptor(Buffer)->ancillary_data_identifier);
break;
case DESCR_NW_NAME:
case DESCR_BOUQUET_NAME:
Text = siGetDescriptorName (Buffer + DESCR_BOUQUET_NAME_LEN,
GetDescriptorLength (Buffer) - DESCR_BOUQUET_NAME_LEN);
// fprintf (stderr, "Got descriptor with tag = 0x%X, text = '%s'\n", GetDescriptorTag(Buffer), Text);
CreateBouquetNameDescriptor (Descriptor, Text, GetDescriptorTag(Buffer));
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);
break;
case DESCR_SERVICE:
Text = siGetDescriptorName (Buffer + DESCR_SERVICE_LEN,
CastServiceDescriptor(Buffer)->provider_name_length);
Text2 = siGetDescriptorName (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);
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 = siGetDescriptorName (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);
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);
Length = CastExtendedEventDescriptor(Buffer)->length_of_items;
Ptr += DESCR_EXTENDED_EVENT_LEN;
// printf ("EEDesc #%d, %s\n", CastExtendedEventDescriptor(Buffer)->descriptor_number, Text);
while ((Length > 0) && (Length < GetDescriptorLength (Buffer)))
{
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)));
// printf ("EEItem #%d, %s, %s\n", CastExtendedEventDescriptor(Buffer)->descriptor_number, Text, Text2);
AddExtendedEventItem (Descriptor, Text2, Text);
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:
Length = GetDescriptorLength (Buffer) - DESCR_CA_IDENTIFIER_LEN;
CreateCaIdentifierDescriptor (Descriptor, Length / 2);
Ptr += DESCR_CA_IDENTIFIER_LEN; i = 0;
while (Length > 0)
{ SetCaIdentifierID(Descriptor, i, ((*((u_char *) Ptr)<<8) + *((u_char *) (Ptr+1))));
Length -= 2; Ptr += 2; i++; }
break;
case DESCR_CA:
{
struct CaDescriptor *CD;
Length = GetDescriptorLength (Buffer) - DESCR_CA_LEN;
CreateCaDescriptor (Descriptor,
HILO(CastCaDescriptor(Buffer)->CA_type),
HILO(CastCaDescriptor(Buffer)->CA_PID), Length);
Ptr += DESCR_CA_LEN; i = 0;
while (Length > 0)
{ SetCaData(Descriptor, i, *Ptr);
Length --; Ptr ++; i++; }
/*
* The following analyses are more or less directly copied from
* MultiDec 8.4b Sources. Thanx to Espresso for his great work !!
*/
CD = (struct CaDescriptor *) Descriptor;
// fprintf (stderr, "TableID: %02x - CA - Type: 0x%04x, PID: %d\n", TempTableID, CD->CA_type, CD->CA_PID);
if ((CD->CA_type >> 8) == 0x01) /* SECA */
{
CD->ProviderID = (GetCaData (CD, 0) << 8) | GetCaData (CD, 1);
}
else if ((CD->CA_type >> 8) == 0x05) /* Viaccess ? (France Telecom) */
{
i=0;
while (i < CD->DataLength)
{
if ((GetCaData (CD, i) == 0x14) && (GetCaData (CD, i+1) == 0x03))
{
CD->ProviderID = (GetCaData (CD, i+2) << 16) |
(GetCaData (CD, i+3) << 8) |
(GetCaData (CD, i+4) & 0xf0);
i = CD->DataLength;
}
i++;
}
}
if (CD->CA_type==0x0100) /* SECA 1 */
{
/* bptr=MyPtr+19;
i=19;
while ( i+4 < ca_info->len ) {
if ( (*bptr&0xE0) == 0xE0 ) {
CA_ECM=(( *bptr&0x1f)<<8)+*(bptr+1);
Prov_Ident = ( *(bptr+2)<<8) | *(bptr+3);
j=0;
while ( j < ProgrammNeu[ProgrammNummer].CA_Anzahl ) {
if (( ProgrammNeu[ProgrammNummer].CA_System[j].CA_Typ == CA_Typ )
&& ( ProgrammNeu[ProgrammNummer].CA_System[j].ECM == CA_ECM )) break;
j++;
};
if ( j < MAX_CA_SYSTEMS ) {
if ( j >= ProgrammNeu[ProgrammNummer].CA_Anzahl )
ProgrammNeu[ProgrammNummer].CA_Anzahl++;
ProgrammNeu[ProgrammNummer].CA_System[j].CA_Typ =CA_Typ;
ProgrammNeu[ProgrammNummer].CA_System[j].ECM =CA_ECM ;
ProgrammNeu[ProgrammNummer].CA_System[j].Provider_Id = Prov_Ident;
};
}
i+=0x0f;
bptr+=0x0f;
}; */
}
}
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_TELETEXT:
CreateTeletextDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_TELETEXT_LEN;
Ptr += DESCR_TELETEXT_LEN;
while (Length > 0)
{
AddTeletextItem (Descriptor,
CastTeletextItem(Ptr)->type,
CastTeletextItem(Ptr)->magazine_number,
CastTeletextItem(Ptr)->page_number,
CastTeletextItem(Ptr)->lang_code1,
CastTeletextItem(Ptr)->lang_code2,
CastTeletextItem(Ptr)->lang_code3);
Length -= ITEM_TELETEXT_LEN;
Ptr += ITEM_TELETEXT_LEN;
}
break;
case DESCR_AC3:
CreateAc3Descriptor (Descriptor);
Length = GetDescriptorLength (Buffer);
if (CastAc3Descriptor(Buffer)->ac3_type_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
AC3_TYPE_FLAG, CastAc3Descriptor(Buffer)->ac3_type); }
if (CastAc3Descriptor(Buffer)->bsid_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
BS_ID_FLAG, CastAc3Descriptor(Buffer)->bsid); }
if (CastAc3Descriptor(Buffer)->mainid_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
MAIN_ID_FLAG, CastAc3Descriptor(Buffer)->mainid); }
if (CastAc3Descriptor(Buffer)->asvc_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
ASVC_FLAG, CastAc3Descriptor(Buffer)->asvc); }
Length -= DESCR_AC3_LEN;
Ptr += DESCR_AC3_LEN;
if (Length > 0) AddAc3AdditionalData (Descriptor, Ptr, Length);
break;
case DESCR_SUBTITLING:
CreateSubtitlingDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_SUBTITLING_LEN;
Ptr += DESCR_SUBTITLING_LEN;
while (Length > 0)
{
AddSubtitlingItem (Descriptor,
CastSubtitlingItem(Ptr)->subtitling_type,
HILO (CastSubtitlingItem(Ptr)->composition_page_id),
HILO (CastSubtitlingItem(Ptr)->ancillary_page_id),
CastSubtitlingItem(Ptr)->lang_code1,
CastSubtitlingItem(Ptr)->lang_code2,
CastSubtitlingItem(Ptr)->lang_code3);
Length -= ITEM_SUBTITLING_LEN;
Ptr += ITEM_SUBTITLING_LEN;
}
break;
case DESCR_SAT_DEL_SYS:
// fprintf (stderr, "got descriptor 0x%x\n", GetDescriptorTag(Buffer));
{
descr_satellite_delivery_system_t *sds;
sds = (descr_satellite_delivery_system_t *) Ptr;
if (CheckBcdChar (sds->frequency1) && CheckBcdChar (sds->frequency2) &&
CheckBcdChar (sds->frequency3) && CheckBcdChar (sds->frequency4) &&
CheckBcdChar (sds->orbital_position1) &&
CheckBcdChar (sds->orbital_position2) &&
CheckBcdChar (sds->symbol_rate1) && CheckBcdChar (sds->symbol_rate1) &&
CheckBcdChar (sds->symbol_rate3) && (sds->fec_inner != 0) && (sds->modulation == 1))
{
CreateSatelliteDeliverySystemDescriptor (Descriptor,
BcdCharToInt (sds->frequency1) * 10 * 1000 * 1000 +
BcdCharToInt (sds->frequency2) * 100 * 1000 +
BcdCharToInt (sds->frequency3) * 1000 +
BcdCharToInt (sds->frequency4) * 10,
(sds->west_east_flag ? 1 : -1) *
(BcdCharToInt (sds->orbital_position1) * 100 +
BcdCharToInt (sds->orbital_position2)),
sds->modulation,
sds->polarization,
BcdCharToInt (sds->symbol_rate1) * 10 * 1000 +
BcdCharToInt (sds->symbol_rate2) * 100 +
BcdCharToInt (sds->symbol_rate3),
sds->fec_inner);
}
/* else
{
fprintf (stderr, "Illegal sds descriptor\n");
siDumpDescriptor (Buffer);
} */
}
break;
case DESCR_CABLE_DEL_SYS:
// fprintf (stderr, "got descriptor 0x%x\n", GetDescriptorTag(Buffer));
{
descr_cable_delivery_system_t *cds;
cds = (descr_cable_delivery_system_t *) Ptr;
if (CheckBcdChar (cds->frequency1) && CheckBcdChar (cds->frequency2) &&
CheckBcdChar (cds->frequency3) && CheckBcdChar (cds->frequency4) &&
CheckBcdChar (cds->symbol_rate1) && CheckBcdChar (cds->symbol_rate1) &&
CheckBcdChar (cds->symbol_rate3) && (cds->fec_inner != 0))
{
CreateCableDeliverySystemDescriptor (Descriptor,
BcdCharToInt (cds->frequency1) * 100 * 1000 * 1000 +
BcdCharToInt (cds->frequency2) * 1000 * 1000 +
BcdCharToInt (cds->frequency3) * 10 * 1000 +
BcdCharToInt (cds->frequency4) * 100,
BcdCharToInt (cds->symbol_rate1) * 10 * 1000 +
BcdCharToInt (cds->symbol_rate2) * 100 +
BcdCharToInt (cds->symbol_rate3),
cds->fec_outer,
cds->fec_inner,
cds->modulation
);
}
/* else
{
fprintf (stderr, "Illegal cds descriptor\n");
siDumpDescriptor (Buffer);
} */
}
break;
case DESCR_TERR_DEL_SYS:
// fprintf (stderr, "got descriptor 0x%x\n", GetDescriptorTag(Buffer));
{
descr_terrestrial_delivery_system_t *tds;
tds = (descr_terrestrial_delivery_system_t *) Ptr;
if (CheckBcdChar (tds->frequency1) && CheckBcdChar (tds->frequency2) &&
CheckBcdChar (tds->frequency3) && CheckBcdChar (tds->frequency4))
{
CreateTerrestrialDeliverySystemDescriptor (Descriptor,
BcdCharToInt (tds->frequency1) * 100 * 1000 * 1000 +
BcdCharToInt (tds->frequency2) * 1000 * 1000 +
BcdCharToInt (tds->frequency3) * 10 * 1000 +
BcdCharToInt (tds->frequency4) * 100,
tds->bandwidth,
tds->constellation,
tds->hierarchy,
tds->code_rate_HP,
tds->code_rate_LP,
tds->guard_interval,
tds->transmission_mode,
tds->other_frequency_flag
);
}
/* else
{
fprintf (stderr, "Illegal cds descriptor\n");
siDumpDescriptor (Buffer);
} */
}
break;
case DESCR_SERVICE_LIST:
// fprintf (stderr, "got descriptor 0x%x\n", GetDescriptorTag(Buffer));
CreateServiceListDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_SERVICE_LIST_LEN;
Ptr += DESCR_SERVICE_LIST_LEN;
while (Length > 0)
{
AddServiceListEntry (Descriptor,
HILO (CastServiceListDescriptorLoop(Ptr)->service_id),
CastServiceListDescriptorLoop(Ptr)->service_type);
Length -= DESCR_SERVICE_LIST_LEN;
Ptr += DESCR_SERVICE_LIST_LEN;
}
break;
case DESCR_LOCAL_TIME_OFF:
CreateLocalTimeOffsetDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_LOCAL_TIME_OFFSET_LEN;
Ptr += DESCR_LOCAL_TIME_OFFSET_LEN;
while (Length > 0)
{
time_t ct, co, no;
ct = MjdToEpochTime (CastLocalTimeOffsetEntry(Ptr)->time_of_change_mjd) +
BcdTimeToSeconds (CastLocalTimeOffsetEntry(Ptr)->time_of_change_time);
co = (BcdCharToInt(CastLocalTimeOffsetEntry(Ptr)->local_time_offset_h) * 3600 +
BcdCharToInt(CastLocalTimeOffsetEntry(Ptr)->local_time_offset_m) * 60) *
((CastLocalTimeOffsetEntry(Ptr)->local_time_offset_polarity) ? -1 : 1);
no = (BcdCharToInt(CastLocalTimeOffsetEntry(Ptr)->next_time_offset_h) * 3600 +
BcdCharToInt(CastLocalTimeOffsetEntry(Ptr)->next_time_offset_m) * 60) *
((CastLocalTimeOffsetEntry(Ptr)->local_time_offset_polarity) ? -1 : 1);
AddLocalTimeOffsetEntry (Descriptor,
CastLocalTimeOffsetEntry(Ptr)->country_code1,
CastLocalTimeOffsetEntry(Ptr)->country_code2,
CastLocalTimeOffsetEntry(Ptr)->country_code3,
CastLocalTimeOffsetEntry(Ptr)->country_region_id, co, ct, no);
Length -= LOCAL_TIME_OFFSET_ENTRY_LEN;
Ptr += LOCAL_TIME_OFFSET_ENTRY_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_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_VBI_DATA:
case DESCR_VBI_TELETEXT:
case DESCR_MOSAIC:
case DESCR_TELEPHONE:
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_CELL_LIST:
case DESCR_CELL_FREQ_LINK:
case DESCR_ANNOUNCEMENT_SUPPORT:
default:
// fprintf (stderr, "Unsupported descriptor with tag = 0x%02X\n", GetDescriptorTag(Ptr));
// siDumpDescriptor (Buffer);
/* fprintf (stderr, "unsupported descriptor 0x%x\n",
GetDescriptorTag(Buffer)); */
break;
}
if (Descriptor) xAddTail (Descriptors, Descriptor);
return;
}
/*
* ToDo: ETSI conformal text definition
*/
#define GDT_TEXT_DESCRIPTOR 0
#define GDT_NAME_DESCRIPTOR 1
char *siGetDescriptorTextHandler (u_char *, int , int );
char *siGetDescriptorTextHandler (u_char *Buffer, int Length, int type)
{
char *tmp, *result;
int i;
if ((Length < 0) || (Length > 4095))
return (xSetText ("text error"));
/* ASSENIZATION: removing coding detection - suppose they are all ANSI */
// 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 == '\n') ||
(*Buffer >= 0xa0 && *Buffer <= 0xff)) *tmp++ = *Buffer;
if (*Buffer == 0x8A) *tmp++ = '\n';
if ((*Buffer == 0x86 || *Buffer == 0x87) && !(GDT_NAME_DESCRIPTOR & type)) *tmp++ = ' ';
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);
}
char *siGetDescriptorText (u_char *Buffer, int Length)
{
return siGetDescriptorTextHandler (Buffer, Length, GDT_TEXT_DESCRIPTOR);
}
char *siGetDescriptorName (u_char *Buffer, int Length)
{
return siGetDescriptorTextHandler (Buffer, Length, GDT_NAME_DESCRIPTOR);
}
// 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;
}
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