Re: [PATCH v6 0/6] Raspberry Pi HEVC decoder driver

[Jonas Karlman <jonas@kwiboo.se>]

Hi again,

[snip]

>> Testing is with a downstream patchset to FFmpeg. I'm told FFmpeg
>> currently has no stateless decode support, but we will be reviewing
>> works that have been in progress and our downstream patches to see
>> whether that can be pushed onwards.
> 
> Please see FFmpeg PR20847 "Add V4L2 Request API hwaccels for MPEG2,
> H.264, HEVC, VP8, VP9 and AV1" [1] for pending upstream FFmpeg work.
> 
> My 4l2request-v3-pixfmts branch [2] also contains extra commit to make
> it work with downstream rpi kernel version, using non-MT pixfmts.
> 
> I will give this a spin together with the FFmpeg PR, adding support for
> the MT based pixfmts should hopefully be easy.

My FFmpeg v4l2request-v3-pixfmts branch [2] got a small update that adds
support for this decoder and pix formats. Tested on a rpi5 using the
downstream rpi-6.18 kernel and kodi-gbm for visual playback confirmation.

  [AVHWFramesContext @ 0x7ffeb81abc50] Using V4L2 media driver rpi-hevc-dec (6.18.15) for S265
  [AVHWFramesContext @ 0x7ffeb81abc50] Using CAPTURE buffer format Nc12 (1920x1088)
  [V4L2RequestContext @ 0x7ffeb81abb00] frame-based decoder with SLICE_PARAMS=600, ENTRY_POINT_OFFSETS=0 and SCALING_MATRIX=1 controls

Will update the main FFmpeg PR (and backport branches) with the required
changes after some more testing.

Regards,
Jonas

> [1] https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20847
> [2] https://code.ffmpeg.org/Kwiboo/FFmpeg/commits/branch/v4l2request-v3-pixfmts
> 
> Regards,
> Jonas

[snip]