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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2019-08-15 17:44:45 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-19 20:41:45 +0300 |
| commit | 2b770bee787daec66ed86baf4fc83275f949c8ac (patch) | |
| tree | 95b91f9db7577ea76939a0c9c3992441a1be43f8 /Documentation/media/uapi | |
| parent | 760327930e10f6108ce9e44854ec3b5ef30cdcbd (diff) | |
| download | linux-2b770bee787daec66ed86baf4fc83275f949c8ac.tar.xz | |
media: videodev2.h: add V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM
Add an enum_fmt format flag to specifically tag coded formats where
full bytestream parsing is supported by the device.
Some stateful decoders are capable of fully parsing a bytestream,
but others require that userspace pre-parses the bytestream into
frames or fields (see the corresponding pixelformat descriptions
for details).
If this flag is set, then this pre-parsing step is not required
(but still possible, of course).
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
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 822d6730e7d2..ebc05ce74bdf 100644 --- a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst +++ b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst @@ -127,6 +127,14 @@ one until ``EINVAL`` is returned. - This format is not native to the device but emulated through software (usually libv4l2), where possible try to use a native format instead for better performance. + * - ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` + - 0x0004 + - The hardware decoder for this compressed bytestream format (aka coded + format) is capable of parsing a continuous bytestream. Applications do + not need to parse the bytestream themselves to find the boundaries + 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. Return Value |