Re: [FFmpeg-devel] [PATCH v7 0/5] JPEG XL Parser (and bug fixes)

[Leo Izen <leo.izen@gmail.com>]

On 8/2/23 16:33, Leo Izen wrote:
> Changes from v6:
> - Added dummy stub libavformat/jpegxl_parse.c to fix shared builds
> 
> Changes from v5:
> - Attached an extra commit to fix existing bug with libjxldec
> - Made various changes based on comments by Andreas Reinhardt
> -- removed jpegxl_parse.c from avformat, and jpegxl_parse.o from avformat/Makefile/OBJS
> -- checked for failure in init_vlc_lengths
> -- used a macro to initialize VLCElem structs
> -- used heap allocations for a buffer of size 250k, instead of stack
> -- renamed "code" to "len"
> - Fix demuxer to avoid using avio_size, breaking piped input
> - Fix some parser bugs discovered during more extensive testing
> 
> Changes from v4:
> - Added an entropy decoder and full parser, which finds the
>      boundaries between files correctly
> - Removed unnecessary logging in libjxldec
> 
> Changes from v3:
> 
> - Don't remove AV_CODEC_CAP_DR1 from libjxldec
> - jpegxl_parse.o added to STLIBOBJS in avcodec/Makefile
> - add pipe demuxer to avformat/Makefile's SHLIBOBJS
> 
> Changes from v2:
> 
> - Fix libjxldec to work with packets that are smaller than one frame
> - Change how code is shared between libavcodec and libavformat to be more sensible.
> - Fix the parser to work with large headers that proceed the codestream in a container format
>      (for example, if several-KB Exif boxes preceed the codestream.)
> - Modify the parser to set width/height instead of avctx
>    Note: avctx->pix_fmt and s->format are both set, because otherwise the CLI tools won't print
>      the pixel format without libjxl enabled.
> - Update the fate test based on the new parser's packetization
> 
> This test relies on FATE samples that haven't been uploaded yet. To test, unzip
> the following zipfile[1] in the FATE_SAMPLES directory, placing the test images in jxl/.
> 
> [1]: https://buzo.us/y.zip
> 
> sha256sum: 43a2eeb0dfdf471b47a9fdfb1653974fa156ceceb776891cc137569a8ebf0e75
> signature: https://buzo.us/R.asc
> 
> Leo Izen (5):
>    avcodec/libjxldec: fix errors when decoding grayscale after rgb
>    avcodec/libjxldec: use internal AVFrame as buffered space
>    avcodec/jpegxl_parser: add JPEG XL parser
>    avformat/jpegxl: remove jpegxl_probe, instead call
>      avcodec/jpegxl_parse
>    fate/jpegxl_anim: add demuxer fate test for jpegxl_anim
> 
>   libavcodec/Makefile                           |    3 +
>   libavcodec/jpegxl.h                           |   94 ++
>   libavcodec/jpegxl_parse.c                     |  520 ++++++
>   libavcodec/jpegxl_parse.h                     |   72 +
>   libavcodec/jpegxl_parser.c                    | 1477 +++++++++++++++++
>   libavcodec/libjxldec.c                        |   41 +-
>   libavcodec/parsers.c                          |    1 +
>   libavcodec/version.h                          |    2 +-
>   libavformat/Makefile                          |    6 +-
>   libavformat/img2dec.c                         |    4 +-
>   libavformat/jpegxl_anim_dec.c                 |  132 +-
>   .../{jpegxl_probe.h => jpegxl_parse.c}        |   21 +-
>   libavformat/jpegxl_probe.c                    |  412 -----
>   libavformat/version.h                         |    2 +-
>   tests/Makefile                                |    1 +
>   tests/fate/jxl.mak                            |   16 +
>   tests/ref/fate/jxl-anim-demux-belgium         |    6 +
>   tests/ref/fate/jxl-anim-demux-icos4d          |    6 +
>   tests/ref/fate/jxl-anim-demux-lenna256        |    6 +
>   tests/ref/fate/jxl-anim-demux-newton          |    6 +
>   20 files changed, 2273 insertions(+), 555 deletions(-)
>   create mode 100644 libavcodec/jpegxl.h
>   create mode 100644 libavcodec/jpegxl_parse.c
>   create mode 100644 libavcodec/jpegxl_parse.h
>   create mode 100644 libavcodec/jpegxl_parser.c
>   rename libavformat/{jpegxl_probe.h => jpegxl_parse.c} (55%)
>   delete mode 100644 libavformat/jpegxl_probe.c
>   create mode 100644 tests/fate/jxl.mak
>   create mode 100644 tests/ref/fate/jxl-anim-demux-belgium
>   create mode 100644 tests/ref/fate/jxl-anim-demux-icos4d
>   create mode 100644 tests/ref/fate/jxl-anim-demux-lenna256
>   create mode 100644 tests/ref/fate/jxl-anim-demux-newton
> 

Merging tomorrow as this has been through several review cycles.

- Leo Izen
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