diff options
| -rw-r--r-- | Documentation/media/uapi/dvb/dmx-get-pes-pids.rst | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst b/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst index 20288c11d279..fbdbc12869d1 100644 --- a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst +++ b/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst @@ -25,13 +25,31 @@ Arguments File descriptor returned by :c:func:`open() <dvb-dmx-open>`. ``pids`` - Undocumented. + Array used to store 5 Program IDs. Description ----------- -.. note:: This ioctl is undocumented. Documentation is welcome. +This ioctl allows to query a DVB device to return the first PID used +by audio, video, textext, subtitle and PCR programs on a given service. +They're stored as: + +======================= ======== ======================================= +PID element position content +======================= ======== ======================================= +pids[DMX_PES_AUDIO] 0 first audio PID +pids[DMX_PES_VIDEO] 1 first video PID +pids[DMX_PES_TELETEXT] 2 first teletext PID +pids[DMX_PES_SUBTITLE] 3 first subtitle PID +pids[DMX_PES_PCR] 4 first Program Clock Reference PID +======================= ======== ======================================= + + +.. note:: + + A value equal to 0xffff means that the PID was not filled by the + Kernel. Return Value |