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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-select-source.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-select-source.rst')
-rw-r--r-- | Documentation/userspace-api/media/dvb/video-select-source.rst | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/dvb/video-select-source.rst b/Documentation/userspace-api/media/dvb/video-select-source.rst new file mode 100644 index 000000000..929a20985 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/video-select-source.rst @@ -0,0 +1,76 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.video + +.. _VIDEO_SELECT_SOURCE: + +=================== +VIDEO_SELECT_SOURCE +=================== + +Name +---- + +VIDEO_SELECT_SOURCE + +.. attention:: This ioctl is deprecated. + +Synopsis +-------- + +.. c:macro:: VIDEO_SELECT_SOURCE + +``int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source)`` + +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_SELECT_SOURCE for this command. + + - .. row 3 + + - video_stream_source_t source + + - Indicates which source shall be used for the Video stream. + +Description +----------- + +This ioctl is for Digital TV devices only. This ioctl was also supported by the +V4L2 ivtv driver, but that has been replaced by the ivtv-specific +``IVTV_IOC_PASSTHROUGH_MODE`` ioctl. + +This ioctl call informs the video device which source shall be used for +the input data. The possible sources are demux or memory. If memory is +selected, the data is fed to the video device through the write command. + +.. c:type:: video_stream_source_t + +.. code-block:: c + + typedef enum { + VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */ + VIDEO_SOURCE_MEMORY /* If this source is selected, the stream + comes from the user through the write + system call */ + } video_stream_source_t; + +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. |