Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst
Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst- Extension
.rst- Size
- 1390 bytes
- Lines
- 63
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: DTV.dmx
.. _DMX_GET_PES_PIDS:
================
DMX_GET_PES_PIDS
================
Name
----
DMX_GET_PES_PIDS
Synopsis
--------
.. c:macro:: DMX_GET_PES_PIDS
``int ioctl(fd, DMX_GET_PES_PIDS, __u16 pids[5])``
Arguments
---------
``fd``
File descriptor returned by :c:func:`open()`.
``pids``
Array used to store 5 Program IDs.
Description
-----------
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
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.