| .. 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| V4L2 ivtv driver, but that has been replaced by the ivtv-specific | |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. |