media: pixfmt: Add H264_SLICE_RAW format documentation
The H264_SLICE_RAW format introduced before is meant for stateless decoders that will need the H264 parsed slice data without the start code. Let's document it. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>alistair/sunxi64-5.4-dsi
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@ -52,6 +52,31 @@ Compressed Formats
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- ``V4L2_PIX_FMT_H264_MVC``
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- ``V4L2_PIX_FMT_H264_MVC``
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- 'M264'
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- 'M264'
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- H264 MVC video elementary stream.
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- H264 MVC video elementary stream.
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* .. _V4L2-PIX-FMT-H264-SLICE-RAW:
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- ``V4L2_PIX_FMT_H264_SLICE_RAW``
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- 'S264'
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- H264 parsed slice data, without the start code and as
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extracted from the H264 bitstream. This format is adapted for
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stateless video decoders that implement an H264 pipeline
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(using the :ref:`mem2mem` and :ref:`media-request-api`).
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Metadata associated with the frame to decode are required to
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be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
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``V4L2_CID_MPEG_VIDEO_H264_PPS``,
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``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``,
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``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and
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``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS`` controls. See the
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:ref:`associated Codec Control IDs <v4l2-mpeg-h264>`. Exactly
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one output and one capture buffer must be provided for use
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with this pixel format. The output buffer must contain the
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appropriate number of macroblocks to decode a full
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corresponding frame to the matching capture buffer.
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.. note::
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This format is not yet part of the public kernel API and it
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is expected to change.
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* .. _V4L2-PIX-FMT-H263:
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* .. _V4L2-PIX-FMT-H263:
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- ``V4L2_PIX_FMT_H263``
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- ``V4L2_PIX_FMT_H263``
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