• Paul Kocialkowski's avatar
    media: v4l: Add definitions for HEVC stateless decoding · 256fa392
    Paul Kocialkowski authored
    This introduces the required definitions for HEVC decoding support with
    stateless VPUs. The controls associated to the HEVC slice format provide
    the required meta-data for decoding slices extracted from the bitstream.
    
    They are not exported to the public V4L2 API since reworking this API
    will likely be needed for covering various use-cases and new hardware.
    
    Multi-slice decoding is exposed as a valid decoding mode to match current
    H.264 support but it is not yet implemented.
    
    The interface comes with the following limitations:
    * No custom quantization matrices (scaling lists);
    * Support for a single temporal layer only;
    * No slice entry point offsets support;
    * No conformance window support;
    * No VUI parameters support;
    * No support for SPS extensions: range, multilayer, 3d, scc, 4 bits;
    * No support for PPS extensions: range, multilayer, 3d, scc, 4 bits.
    Signed-off-by: default avatarPaul Kocialkowski <paul.kocialkowski@bootlin.com>
    [hverkuil-cisco@xs4all.nl: use 1ULL in flags defines in hevc-ctrls.h]
    Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
    256fa392
videodev2.h.rst.exceptions 24.8 KB