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The usage of the term "DVB" at the dvb API docs is confusing, as, right now, it can refer to either the European digital TV standard or to the subsystem. So, prefer calling it as "Digital TV" on most places, to avoid ambiguity. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
78 lines
1.6 KiB
ReStructuredText
78 lines
1.6 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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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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