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85 lines
2.0 KiB
ReStructuredText
85 lines
2.0 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _VIDEO_SELECT_SOURCE:
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===================
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VIDEO_SELECT_SOURCE
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===================
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Name
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----
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VIDEO_SELECT_SOURCE
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.. attention:: This ioctl is deprecated.
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Synopsis
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--------
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.. c:function:: int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source)
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:name: VIDEO_SELECT_SOURCE
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Arguments
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---------
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- int fd
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- File descriptor returned by a previous call to open().
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- .. row 2
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- int request
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- Equals VIDEO_SELECT_SOURCE for this command.
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- .. row 3
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- video_stream_source_t source
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- Indicates which source shall be used for the Video stream.
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Description
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-----------
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This ioctl is for Digital TV devices only. This ioctl was also supported by the
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V4L2 ivtv driver, but that has been replaced by the ivtv-specific
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``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
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This ioctl call informs the video device which source shall be used for
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the input data. The possible sources are demux or memory. If memory is
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selected, the data is fed to the video device through the write command.
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.. c:type:: video_stream_source_t
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.. code-block:: c
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typedef enum {
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VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
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VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
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comes from the user through the write
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system call */
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} video_stream_source_t;
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Return Value
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------------
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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