[PATCH v3 0/3] Add WebP support to hantro decoder

[Hugues FRUCHET]

Hi all,

The corresponding GStreamer code has been pushed here (v4l2slwebpdec):
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7939

BR,
Hugues.

On 11/21/24 14:19, Hugues Fruchet wrote:
> Add WebP image decoding support to stateless V4L2 VP8 decoder.
> 
> This have been tested on STM32MP257-EV board using GStreamer.
> 
> Simple basic test:
> $> wget https://www.gstatic.com/webp/gallery/1.webp
> $> gst-launch-1.0 filesrc location= 1.webp ! typefind ! v4l2slwebpdec ! imagefreeze num-buffers=20 ! waylandsink fullscreen=true
> 
> Slideshow of a set of WebP pictures and WebM video files:
> $> wget https://www.gstatic.com/webp/gallery/2.webp
> $> wget https://www.gstatic.com/webp/gallery/3.webp
> $> wget https://www.gstatic.com/webp/gallery/4.webp
> $> wget https://www.gstatic.com/webp/gallery/5.webp
> $> wget https://samplemedia.linaro.org/VP8/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM
> $> gst-play-1.0 *.webp *.webm *.WebM --wait-on-eos
> <hit key ">" to display next file >
> 
> Large WebP image > 16777215 (size > 2^24)
> $> gst-launch-1.0 fakesrc num-buffers=1 format=4 do-timestamp=true filltype=3 sizetype=2 sizemax=25165824 blocksize=25165824 ! video/x-raw, format=I420, width=4096, height=3072, framerate=1/1 ! webpenc quality=100 ! filesink location=4096x3072_HQ_random.webp
> $> ls -l 4096x3072_HQ_random.webp
> [...] 16877404 Nov 20 11:40 4096x3072_HQ_random.webp
> $> gst-launch-1.0 filesrc location= 4096x3072_HQ_random.webp blocksize=16876610 ! image/webp, width=1, height=1, framerate=0/1 ! v4l2slwebpdec ! imagefreeze num-buffers=20 ! waylandsink fullscreen=true
> 
> Large WebP image decoding using post-processor is untested because of lack
> of hardware support on this platform, nevertheless support is provided in
> this serie for further testing on another platform having post-processor
> support.
> 
> ===========
> = history =
> ===========
> version 3:
>     - Fix remarks from Nicolas Dufresne:
>      - Document constraint about key frame only for WebP
>      - Fix rebase issue
>     - Fix typo detected by Diederik de Haas
> 
> version 2:
>     - Fix remarks from Nicolas Dufresne:
>      - Use bytesperline helper to compute chroma size
>      - Introduce a new explicit WEBP frame compressed format
>        instead of relying on VP8 + WebP flag
>      - 4K support in both decoder and post-proc
> 
> version 1:
>    - Initial submission
> 
> Hugues Fruchet (3):
>    media: uapi: add WebP uAPI
>    media: verisilicon: add WebP decoding support
>    media: verisilicon: postproc: 4K support
> 
>   .../userspace-api/media/v4l/biblio.rst          |  9 +++++++++
>   .../media/v4l/pixfmt-compressed.rst             | 17 +++++++++++++++++
>   drivers/media/platform/verisilicon/hantro.h     |  2 ++
>   .../media/platform/verisilicon/hantro_g1_regs.h |  3 ++-
>   .../platform/verisilicon/hantro_g1_vp8_dec.c    | 14 ++++++++++++++
>   .../platform/verisilicon/hantro_postproc.c      |  6 +++++-
>   .../media/platform/verisilicon/hantro_v4l2.c    |  2 ++
>   .../platform/verisilicon/stm32mp25_vpu_hw.c     | 17 +++++++++++++++--
>   drivers/media/v4l2-core/v4l2-ioctl.c            |  1 +
>   include/uapi/linux/videodev2.h                  |  1 +
>   10 files changed, 68 insertions(+), 4 deletions(-)
>