[FFmpeg-devel] [PATCH v3 00/12] encoder AVCodecContext configuration side data

From: "Jan Ekström" <jeebjp@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH v3 00/12] encoder AVCodecContext configuration side data
Date: Fri, 18 Aug 2023 00:48:38 +0300
Message-ID: <20230817214858.184010-1-jeebjp@gmail.com> (raw)

Differences to v2:
1. rebased on top of current master
2. addition of external encoder tests as the attached side data can now be
   parsed from all formats after the movement of side data from being HEVC
   specific to the common h2645 SEI parsing.
3. Various miscellaneous fixups/updates.

This patch set I've now been working for a while since I felt like it was weird
we couldn't pass through information such as static HDR metadata to encoders
from decoded input. This initial version adds the necessary framework, as well
as adds static HDR metadata support for libsvtav1, libx264 as well as libx265
wrappers.

An alternative to this would be to make encoders only properly initialize when
they receive the first AVFrame, but that seems to be a bigger, nastier change
than introducing an AVFrameSideDataSet in avctx as everything seems to
presume that extradata etc are available after opening the encoder.

Note: Any opinions on whether FFCodec or AVCodec should have
      handled_side_data list, so that if format specific generic logic is
      added, it could be checked whether the codec itself handles this side
      data? This could also be utilized to list handled side data from f.ex.
      `ffmpeg -h encoder=libsvtav1`.

Jan

Jan Ekström (12):
  avutil/frame: add AVFrameSideDataSet for passing sets of side data
  avutil/frame: split side data list wiping out to non-AVFrame function
  avutil/frame: add helper for uninitializing side data sets
  avutil/frame: split side_data_from_buf to base and AVFrame func
  avutil/frame: add helper for adding side data to set
  avutil/frame: add helper for getting side data from set
  avutil/frame: add helper for extending a set of side data
  avcodec: add side data set to AVCodecContext
  ffmpeg: pass first video AVFrame's side data to encoder
  avcodec/libsvtav1: add support for writing out CLL and MDCV
  avcodec/libx264: add support for writing out CLL and MDCV
  avcodec/libx265: add support for writing out CLL and MDCV

 fftools/ffmpeg_enc.c            |  11 +++
 libavcodec/avcodec.h            |   7 ++
 libavcodec/libsvtav1.c          |  70 ++++++++++++++++
 libavcodec/libx264.c            |  79 ++++++++++++++++++
 libavcodec/libx265.c            |  82 +++++++++++++++++++
 libavcodec/options.c            |   1 +
 libavutil/Makefile              |   1 +
 libavutil/frame.c               | 138 +++++++++++++++++++++++++++-----
 libavutil/frame.h               |  62 ++++++++++++++
 libavutil/tests/side_data_set.c |  71 ++++++++++++++++
 tests/fate/enc_external.mak     |  15 ++++
 tests/fate/libavutil.mak        |   4 +
 tests/ref/fate/libsvtav1-hdr10  |  14 ++++
 tests/ref/fate/libx264-hdr10    |  15 ++++
 tests/ref/fate/libx265-hdr10    |  16 ++++
 tests/ref/fate/side_data_set    |   7 ++
 16 files changed, 571 insertions(+), 22 deletions(-)
 create mode 100644 libavutil/tests/side_data_set.c
 create mode 100644 tests/ref/fate/libsvtav1-hdr10
 create mode 100644 tests/ref/fate/libx264-hdr10
 create mode 100644 tests/ref/fate/libx265-hdr10
 create mode 100644 tests/ref/fate/side_data_set

-- 
2.41.0

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