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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/userspace-api/media/dvb/video-command.rst | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/userspace-api/media/dvb/video-command.rst')
-rw-r--r-- | Documentation/userspace-api/media/dvb/video-command.rst | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/dvb/video-command.rst b/Documentation/userspace-api/media/dvb/video-command.rst new file mode 100644 index 000000000..cae9445eb --- /dev/null +++ b/Documentation/userspace-api/media/dvb/video-command.rst @@ -0,0 +1,96 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.video + +.. _VIDEO_COMMAND: + +============= +VIDEO_COMMAND +============= + +Name +---- + +VIDEO_COMMAND + +.. attention:: This ioctl is deprecated. + +Synopsis +-------- + +.. c:macro:: VIDEO_COMMAND + +``int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd)`` + +Arguments +--------- + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - int request + + - Equals VIDEO_COMMAND for this command. + + - .. row 3 + + - struct video_command \*cmd + + - Commands the decoder. + +Description +----------- + +This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders +this ioctl has been replaced by the +:ref:`VIDIOC_DECODER_CMD` ioctl. + +This ioctl commands the decoder. The ``video_command`` struct is a +subset of the ``v4l2_decoder_cmd`` struct, so refer to the +:ref:`VIDIOC_DECODER_CMD` documentation for +more information. + +.. c:type:: video_command + +.. code-block:: c + + /* The structure must be zeroed before use by the application + This ensures it can be extended safely in the future. */ + struct video_command { + __u32 cmd; + __u32 flags; + union { + struct { + __u64 pts; + } stop; + + struct { + /* 0 or 1000 specifies normal speed, + 1 specifies forward single stepping, + -1 specifies backward single stepping, + >1: playback at speed/1000 of the normal speed, + <-1: reverse playback at (-speed/1000) of the normal speed. */ + __s32 speed; + __u32 format; + } play; + + struct { + __u32 data[16]; + } raw; + }; + }; + +Return Value +------------ + +On success 0 is returned, on error -1 and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes <gen-errors>` chapter. |