ZVBI Library 0.2.44
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Program Identification. More...
#include <pdc.h>
Data Fields | |
vbi_pid_channel | channel |
vbi_cni_type | cni_type |
unsigned int | cni |
vbi_pil | pil |
vbi_bool | luf |
vbi_bool | mi |
vbi_bool | prf |
vbi_pcs_audio | pcs_audio |
unsigned int | pty |
vbi_bool | tape_delayed |
void * | _reserved2 [2] |
int | _reserved3 [4] |
Program Identification.
This structure contains a Program ID received via Teletext packet 8/30 format 2, VPS, a DVB PDC descriptor or an XDS Current/Future Program ID packet. When the source does not provide all this information, libzvbi initializes the respective fields with an appropriate value.
vbi_pid_channel vbi_program_id::channel |
Source of this PID.
Referenced by vbi_decode_dvb_pdc_descriptor(), vbi_decode_teletext_8302_pdc(), and vbi_decode_vps_pdc().
vbi_cni_type vbi_program_id::cni_type |
Network identifier type, one of
VBI_CNI_TYPE_NONE
,VBI_CNI_TYPE_8302
orVBI_CNI_TYPE_VPS
. Referenced by vbi_decode_teletext_8302_pdc(), and vbi_decode_vps_pdc().
unsigned int vbi_program_id::cni |
Country and Network Identifier provided by Teletext packet 8/30 format 2 and VPS. Note when the source is Teletext and the LUF flag is set, this CNI may refer to a different network than the one transmitting the PID.
Referenced by vbi_decode_teletext_8302_pdc(), vbi_decode_vps_pdc(), and vbi_encode_vps_pdc().
vbi_pil vbi_program_id::pil |
Program Identification Label. This is the only information available from all PID sources.
Referenced by vbi_decode_dvb_pdc_descriptor(), vbi_decode_teletext_8302_pdc(), vbi_decode_vps_pdc(), vbi_encode_dvb_pdc_descriptor(), and vbi_encode_vps_pdc().
vbi_bool vbi_program_id::luf |
PDC Label Update Flag (only transmitted in Teletext packets). When this flag is set, the PID is intended to update VCR memory, it does not refer to the current program. According to the examples in EN 300 231 Annex E.3 however VCRs should probably also handle the PID as if a VBI_PIL_INHIBIT_TERMINATE
service code was transmitted.
This flag is used to announce a new PIL for the current program. The CNI may refer to a different network than the one transmitting the PID, for example when a program is about to overrun and will continue on a different network. If a program is postponed and no transmission time has been decided yet the new PIL may contain an arbitrary or unreal time.
Referenced by vbi_decode_teletext_8302_pdc().
vbi_bool vbi_program_id::mi |
PDC Mode Identifier (Teletext). When TRUE
the end of transmission of this PIL coincides exactly with the end of the program. When FALSE
the program ends 30 seconds after the PIL is no longer transmitted. Note the flag applies to all valid PILs as well as the VBI_PIL_INHIBIT_TERMINATE
and VBI_PIL_INTERRUPTION
service codes.
Referenced by vbi_decode_dvb_pdc_descriptor(), vbi_decode_teletext_8302_pdc(), and vbi_decode_vps_pdc().
vbi_bool vbi_program_id::prf |
PDC Prepare to Record Flag (Teletext). When TRUE
the program identified by this PID is about to start. A transition to FALSE
indicates the immediate start of the program, regardless of the state of the MI flag.
Referenced by vbi_decode_teletext_8302_pdc().
vbi_pcs_audio vbi_program_id::pcs_audio |
PDC Program Control Status - Audio (Teletext and VPS).
Referenced by vbi_decode_teletext_8302_pdc(), vbi_decode_vps_pdc(), and vbi_encode_vps_pdc().
unsigned int vbi_program_id::pty |
PDC Program Type code (Teletext and VPS), can be 0 or 0xFF if none or unknown.
Referenced by vbi_decode_teletext_8302_pdc(), vbi_decode_vps_pdc(), and vbi_encode_vps_pdc().
vbi_bool vbi_program_id::tape_delayed |
XDS T flag. TRUE
if a program is routinely tape delayed (for mountain and pacific time zones). FALSE
if not or this is unknown.
This flag is used to determine if an offset is necessary because of local station tape delays. The amount of tape delay used for a given time zone is transmitted in a XDS Channel Tape Delay packet.