[FFmpeg-devel] [PATCH v4 00/13] encoder AVCodecContext configuration side data

From: "Jan Ekström" <jeebjp@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH v4 00/13] encoder AVCodecContext configuration side data
Date: Fri,  1 Sep 2023 23:38:10 +0300
Message-ID: <20230901203828.275197-1-jeebjp@gmail.com> (raw)

Differences to v3:
1. rebased on top of current master
2. limited libx264 HDR10 metadata FATE test to BUILD >=163
3. renamed the set variable to `frame_sd_set` as per request from James on IRC
4. adopted various things noted by Andreas in reviews for various patches
5. extended side data set FATE test to also test av_frame_side_data_set_extend

Comparison URL (mostly configure and wrappers, avutil/frame.c):
https://github.com/jeeb/ffmpeg/compare/avcodec_cll_mdcv_side_data_v3..avcodec_cll_mdcv_side_data_v4

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 (13):
  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: split side data removal out to non-AVFrame function
  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

 configure                       |   2 +
 fftools/ffmpeg_enc.c            |  13 +++
 libavcodec/avcodec.h            |   7 ++
 libavcodec/libsvtav1.c          |  67 ++++++++++++++
 libavcodec/libx264.c            |  78 ++++++++++++++++
 libavcodec/libx265.c            |  87 ++++++++++++++++++
 libavcodec/options.c            |   1 +
 libavutil/Makefile              |   1 +
 libavutil/frame.c               | 155 +++++++++++++++++++++++++-------
 libavutil/frame.h               |  63 +++++++++++++
 libavutil/tests/side_data_set.c | 113 +++++++++++++++++++++++
 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    |  21 +++++
 17 files changed, 642 insertions(+), 30 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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