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| author | Maxime Jourdan <mjourdan@baylibre.com> | 2019-08-15 17:44:46 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-19 20:56:31 +0300 |
| commit | 60a039eb27f921abaef4778999db510dd75d5e48 (patch) | |
| tree | 713d1d840068b8b71b96ecd6acea035d2b98c09f /Documentation/media/uapi | |
| parent | 2b770bee787daec66ed86baf4fc83275f949c8ac (diff) | |
| download | linux-60a039eb27f921abaef4778999db510dd75d5e48.tar.xz | |
media: videodev2.h: add V4L2_FMT_FLAG_DYN_RESOLUTION
Add an enum_fmt format flag to specifically tag coded formats where
dynamic resolution switching is supported by the device.
This is useful for some codec drivers that can support dynamic
resolution switching for one or more of their listed coded formats. It
allows userspace to know whether it should extract the video parameters
itself, or if it can rely on the device to send V4L2_EVENT_SOURCE_CHANGE
when such changes are detected.
Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Acked-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation/media/uapi')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-enum-fmt.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst index ebc05ce74bdf..399ef1062bac 100644 --- a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst +++ b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst @@ -135,6 +135,14 @@ one until ``EINVAL`` is returned. between frames/fields. This flag can only be used in combination with the ``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to compressed formats only. This flag is valid for stateful decoders only. + * - ``V4L2_FMT_FLAG_DYN_RESOLUTION`` + - 0x0008 + - Dynamic resolution switching is supported by the device for this + compressed bytestream format (aka coded format). It will notify the user + via the event ``V4L2_EVENT_SOURCE_CHANGE`` when changes in the video + parameters are detected. This flag can only be used in combination + with the ``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to + compressed formats only. It is also only applies to stateful codecs. Return Value |