diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/vidioc-g-priority.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-g-priority.rst | 86 |
1 files changed, 31 insertions, 55 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-g-priority.rst b/Documentation/media/uapi/v4l/vidioc-g-priority.rst index 9f774ce400a4..a763988f64e4 100644 --- a/Documentation/media/uapi/v4l/vidioc-g-priority.rst +++ b/Documentation/media/uapi/v4l/vidioc-g-priority.rst @@ -15,9 +15,11 @@ VIDIOC_G_PRIORITY - VIDIOC_S_PRIORITY - Query or request the access priority ass Synopsis ======== -.. cpp:function:: int ioctl( int fd, int request, enum v4l2_priority *argp ) +.. c:function:: int ioctl( int fd, VIDIOC_G_PRIORITY, enum v4l2_priority *argp ) + :name: VIDIOC_G_PRIORITY -.. cpp:function:: int ioctl( int fd, int request, const enum v4l2_priority *argp ) +.. c:function:: int ioctl( int fd, VIDIOC_S_PRIORITY, const enum v4l2_priority *argp ) + :name: VIDIOC_S_PRIORITY Arguments @@ -26,9 +28,6 @@ Arguments ``fd`` File descriptor returned by :ref:`open() <func-open>`. -``request`` - VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY - ``argp`` Pointer to an enum v4l2_priority type. @@ -45,62 +44,39 @@ an enum v4l2_priority variable and call :ref:`VIDIOC_S_PRIORITY <VIDIOC_G_PRIORI with a pointer to this variable. -.. _v4l2-priority: +.. c:type:: v4l2_priority + +.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| .. flat-table:: enum v4l2_priority :header-rows: 0 :stub-columns: 0 :widths: 3 1 4 - - - .. row 1 - - - ``V4L2_PRIORITY_UNSET`` - - - 0 - - - - - - .. row 2 - - - ``V4L2_PRIORITY_BACKGROUND`` - - - 1 - - - Lowest priority, usually applications running in background, for - example monitoring VBI transmissions. A proxy application running - in user space will be necessary if multiple applications want to - read from a device at this priority. - - - .. row 3 - - - ``V4L2_PRIORITY_INTERACTIVE`` - - - 2 - - - - - - .. row 4 - - - ``V4L2_PRIORITY_DEFAULT`` - - - 2 - - - Medium priority, usually applications started and interactively - controlled by the user. For example TV viewers, Teletext browsers, - or just "panel" applications to change the channel or video - controls. This is the default priority unless an application - requests another. - - - .. row 5 - - - ``V4L2_PRIORITY_RECORD`` - - - 3 - - - Highest priority. Only one file descriptor can have this priority, - it blocks any other fd from changing device properties. Usually - applications which must not be interrupted, like video recording. + * - ``V4L2_PRIORITY_UNSET`` + - 0 + - + * - ``V4L2_PRIORITY_BACKGROUND`` + - 1 + - Lowest priority, usually applications running in background, for + example monitoring VBI transmissions. A proxy application running + in user space will be necessary if multiple applications want to + read from a device at this priority. + * - ``V4L2_PRIORITY_INTERACTIVE`` + - 2 + - + * - ``V4L2_PRIORITY_DEFAULT`` + - 2 + - Medium priority, usually applications started and interactively + controlled by the user. For example TV viewers, Teletext browsers, + or just "panel" applications to change the channel or video + controls. This is the default priority unless an application + requests another. + * - ``V4L2_PRIORITY_RECORD`` + - 3 + - Highest priority. Only one file descriptor can have this priority, + it blocks any other fd from changing device properties. Usually + applications which must not be interrupted, like video recording. Return Value |