Commit 2b770bee authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

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: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: default avatarPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: default avatarAlexandre Courbot <acourbot@chromium.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent 76032793

Documentation/media/uapi/v4l/vidioc-enum-fmt.rst

+8 −0
Original line number Diff line number Diff line
@@ -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

Documentation/media/videodev2.h.rst.exceptions

+1 −0
Original line number Diff line number Diff line
@@ -180,6 +180,7 @@ replace define V4L2_PIX_FMT_FLAG_PREMUL_ALPHA reserved-formats 
# V4L2 format flags

replace define V4L2_FMT_FLAG_COMPRESSED fmtdesc-flags

replace define V4L2_FMT_FLAG_EMULATED fmtdesc-flags

replace define V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM fmtdesc-flags



# V4L2 timecode types

replace define V4L2_TC_TYPE_24FPS timecode-type

include/uapi/linux/videodev2.h

+3 −2
Original line number Diff line number Diff line
@@ -776,6 +776,7 @@ struct v4l2_fmtdesc { 


#define V4L2_FMT_FLAG_COMPRESSED		0x0001

#define V4L2_FMT_FLAG_EMULATED			0x0002

#define V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM	0x0004



	/* Frame Size and frame rate enumeration */

/*

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