Dne petek, 27. september 2019 ob 16:34:08 CEST je Paul Kocialkowski napisal(a): > HEVC/H.265 stateless support for V4L2 and Cedrus > > This is early support for HEVC/H.265 stateless decoding in V4L2, > including both definitions and driver support for the Cedrus VPU > driver, which concerns Allwinner devices. > > A specific pixel format is introduced for the HEVC slice format and > controls are provided to pass the bitstream metadata to the decoder. > Some bitstream extensions are intentionally not supported at this point. > > Since this is the first proposal for stateless HEVC/H.265 support in > V4L2, reviews and comments about the controls definitions are > particularly welcome. > > On the Cedrus side, the H.265 implementation covers frame pictures > with both uni-directional and bi-direction prediction modes (P/B > slices). Field pictures (interleaved), scaling lists and 10-bit output > are not supported at this point. Whole series is: Reviewed-by: Jernej Skrabec <jernej.skrabec@xxxxxxxx> Hopefully this can be merged soon. Best regards, Jernej > > Changes since v7: > * Rebased on latest media tree; > * Fixed holes in structures for cacheline alignment; > * Added decode mode and start code controls > (only per-slice and no start code is supported at this point). > > Changes since v6: > * Rebased on latest media tree from Hans; > * Reordered some fields to avoid holes and multi-padding; > * Updated the documentation. > > Changes since v5: > * Rebased atop latest next media tree; > * Moved to flags instead of u8 fields; > * Added padding to ensure 64-bit alignment > (tested with GDB on 32 and 64-bit architectures); > * Reworked cedrus H.265 driver support a bit for flags; > * Split off codec-specific control validation and init; > * Added HEVC controls fields cleanup at std_validate to allow reliable > control comparison with memcmp; > * Fixed various misc reported mistakes. > > Changes since v4: > * Rebased atop latest H.254 series. > > Changes since v3: > * Updated commit messages; > * Updated CID base to avoid conflicts; > * Used cpu_to_le32 for packed le32 data; > * Fixed misc minor issues in the drive code; > * Made it clear in the docs that the API will evolve; > * Made the pixfmt private and split commits about it. > > Changes since v2: > * Moved headers to non-public API; > * Added H265 capability for A64 and H5; > * Moved docs to ext-ctrls-codec.rst; > * Mentionned sections of the spec in the docs; > * Added padding to control structures for 32-bit alignment; > * Made write function use void/size in bytes; > * Reduced the number of arguments to helpers when possible; > * Removed PHYS_OFFSET since we already set PFN_OFFSET; > * Added comments where suggested; > * Moved to timestamp for references instead of index; > * Fixed some style issues reported by checkpatch. > > Changes since v1: > * Added a H.265 capability to whitelist relevant platforms; > * Switched over to tags instead of buffer indices in the DPB > * Declared variable in their reduced scope as suggested; > * Added the H.265/HEVC spec to the biblio; > * Used in-doc references to the spec and the required APIs; > * Removed debugging leftovers. > > Cheers! > > Paul Kocialkowski (3): > media: v4l: Add definitions for HEVC stateless decoding > media: pixfmt: Document the HEVC slice pixel format > media: cedrus: Add HEVC/H.265 decoding support > > Documentation/media/uapi/v4l/biblio.rst | 9 + > .../media/uapi/v4l/ext-ctrls-codec.rst | 553 +++++++++++++++- > .../media/uapi/v4l/pixfmt-compressed.rst | 23 + > .../media/uapi/v4l/vidioc-queryctrl.rst | 18 + > .../media/videodev2.h.rst.exceptions | 3 + > drivers/media/v4l2-core/v4l2-ctrls.c | 108 ++- > drivers/media/v4l2-core/v4l2-ioctl.c | 1 + > drivers/staging/media/sunxi/cedrus/Makefile | 2 +- > drivers/staging/media/sunxi/cedrus/cedrus.c | 52 +- > drivers/staging/media/sunxi/cedrus/cedrus.h | 18 + > .../staging/media/sunxi/cedrus/cedrus_dec.c | 9 + > .../staging/media/sunxi/cedrus/cedrus_h265.c | 616 ++++++++++++++++++ > .../staging/media/sunxi/cedrus/cedrus_hw.c | 4 + > .../staging/media/sunxi/cedrus/cedrus_regs.h | 271 ++++++++ > .../staging/media/sunxi/cedrus/cedrus_video.c | 10 + > include/media/hevc-ctrls.h | 212 ++++++ > include/media/v4l2-ctrls.h | 7 + > 17 files changed, 1907 insertions(+), 9 deletions(-) > create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_h265.c > create mode 100644 include/media/hevc-ctrls.h
