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Diffstat (limited to 'Documentation/userspace-api/media/v4l/control.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/control.rst | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/userspace-api/media/v4l/control.rst b/Documentation/userspace-api/media/v4l/control.rst index 4463fce694b0..19372bb32c4b 100644 --- a/Documentation/userspace-api/media/v4l/control.rst +++ b/Documentation/userspace-api/media/v4l/control.rst @@ -1,4 +1,5 @@ .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L .. _control: @@ -143,9 +144,13 @@ Control IDs recognise the difference between digital and analogue gain use controls ``V4L2_CID_DIGITAL_GAIN`` and ``V4L2_CID_ANALOGUE_GAIN``. +.. _v4l2-cid-hflip: + ``V4L2_CID_HFLIP`` ``(boolean)`` Mirror the picture horizontally. +.. _v4l2-cid-vflip: + ``V4L2_CID_VFLIP`` ``(boolean)`` Mirror the picture vertically. @@ -286,13 +291,15 @@ Control IDs This is a read-only control that can be read by the application and used as a hint to determine the number of CAPTURE buffers to pass to REQBUFS. The value is the minimum number of CAPTURE buffers that is - necessary for hardware to work. + necessary for hardware to work. This control is required for stateful + decoders. ``V4L2_CID_MIN_BUFFERS_FOR_OUTPUT`` ``(integer)`` This is a read-only control that can be read by the application and used as a hint to determine the number of OUTPUT buffers to pass to REQBUFS. The value is the minimum number of OUTPUT buffers that is - necessary for hardware to work. + necessary for hardware to work. This control is required for stateful + encoders. .. _v4l2-alpha-component: |