Lines Matching +full:on +full:- +full:the +full:- +full:fly

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_QUERYSTD - VIDIOC_SUBDEV_QUERYSTD - Sense the video standard received by the current input
38 The hardware may be able to detect the current video standard
40 pointer to a :ref:`v4l2_std_id <v4l2-std-id>` type. The driver
42 supported standards if for example the hardware can only distinguish
43 between 50 and 60 Hz systems. If no signal was detected, then the driver
45 the set must contain all standards supported by the current video input
50    Drivers shall *not* switch the video standard
52    should send the ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support
54    :ref:`VIDIOC_QUERYSTD`. The reason is that a new video standard can mean
55    different buffer sizes as well, and you cannot change buffer sizes on
56    the fly. In general, applications that receive the Source Change event
57    will have to call :ref:`VIDIOC_QUERYSTD`, and if the detected video
58    standard is valid they will have to stop streaming, set the new
64 On success 0 is returned, on error -1 and the ``errno`` variable is set
65 appropriately. The generic error codes are described at the
66 :ref:`Generic Error Codes <gen-errors>` chapter.