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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch b/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch new file mode 100644 index 0000000000..7398807782 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0502-media-pixfmt-Document-the-HEVC-slice-pixel-format.patch @@ -0,0 +1,50 @@ +From 662256810630f6ac6d06ee0cdc5f4660b25f7e98 Mon Sep 17 00:00:00 2001 +From: Paul Kocialkowski <paul.kocialkowski@bootlin.com> +Date: Tue, 22 Oct 2019 12:26:53 -0300 +Subject: [PATCH] media: pixfmt: Document the HEVC slice pixel format + +Commit de06f289283298e2938445019999cec46435375c upstream. + +Document the current state of the HEVC slice pixel format. +The format will need to evolve in the future, which is why it is +not part of the public API. + +Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> +Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> +Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> +--- + .../media/uapi/v4l/pixfmt-compressed.rst | 23 +++++++++++++++++++ + 1 file changed, 23 insertions(+) + +--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst ++++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst +@@ -188,6 +188,29 @@ Compressed Formats + If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` + then the decoder has no requirements since it can parse all the + information from the raw bytestream. ++ * .. _V4L2-PIX-FMT-HEVC-SLICE: ++ ++ - ``V4L2_PIX_FMT_HEVC_SLICE`` ++ - 'S265' ++ - HEVC parsed slice data, as extracted from the HEVC bitstream. ++ This format is adapted for stateless video decoders that implement a ++ HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). ++ This pixelformat has two modifiers that must be set at least once ++ through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE`` ++ and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls. ++ Metadata associated with the frame to decode is required to be passed ++ through the following controls : ++ * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS`` ++ * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS`` ++ * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS`` ++ See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`. ++ Buffers associated with this pixel format must contain the appropriate ++ number of macroblocks to decode a full corresponding frame. ++ ++ .. note:: ++ ++ This format is not yet part of the public kernel API and it ++ is expected to change. + * .. _V4L2-PIX-FMT-FWHT: + + - ``V4L2_PIX_FMT_FWHT`` |