forked from Minki/linux
848d10314b
Trivially fix those broken references, by copying the structs fron the header, just like other API documentation at the DVB side. This doesn't have the level of quality used at the V4L2 side of the API, but, as this documents a deprecated API, used only by av7110 driver, it doesn't make much sense to invest time making it better. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
99 lines
1.8 KiB
ReStructuredText
99 lines
1.8 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _VIDEO_COMMAND:
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=============
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VIDEO_COMMAND
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=============
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Name
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----
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VIDEO_COMMAND
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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(int fd, VIDEO_COMMAND, struct video_command *cmd)
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:name: VIDEO_COMMAND
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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_COMMAND for this command.
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- .. row 3
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- struct video_command \*cmd
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- Commands the decoder.
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Description
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-----------
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This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
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this ioctl has been replaced by the
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:ref:`VIDIOC_DECODER_CMD` ioctl.
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This ioctl commands the decoder. The ``video_command`` struct is a
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subset of the ``v4l2_decoder_cmd`` struct, so refer to the
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:ref:`VIDIOC_DECODER_CMD` documentation for
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more information.
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.. c:type:: struct video_command
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.. code-block:: c
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/* The structure must be zeroed before use by the application
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This ensures it can be extended safely in the future. */
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struct video_command {
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__u32 cmd;
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__u32 flags;
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union {
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struct {
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__u64 pts;
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} stop;
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struct {
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/* 0 or 1000 specifies normal speed,
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1 specifies forward single stepping,
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-1 specifies backward single stepping,
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>1: playback at speed/1000 of the normal speed,
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<-1: reverse playback at (-speed/1000) of the normal speed. */
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__s32 speed;
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__u32 format;
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} play;
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struct {
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__u32 data[16];
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} raw;
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};
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};
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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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