[FFmpeg-devel] [PATCH 0/2] Remove chained ogg stream header packets from demuxer.

[Romain Beauxis <romain.beauxis@gmail.com>]

These patches remove the ogg header packets from secondary chainged ogg
streams from the demuxer.

First, a test utility is added to track what is currently happening with
chained streams.

Then the changes are introduced: the packet demuxing function is used to
explicitely tell the demuxer to skip header packets.

Also, the packet demuxing functions are adapted to properly copy extra
data from the new chained streams so that decoding can keep happening.

The diff from the test output makes it possible to follow what the
changes do to the extracted streams.

Test samples are available at: https://www.dropbox.com/scl/fo/xrtrna2rxr1j354hrtymq/AGwemlxHYecBLNmQ8Fsy--4?rlkey=lzilr4m9w4gfdqygoe172vvy8&dl=0

Romain Beauxis (2):
  tests: Add stream dump test API util, use it to dump stream data for
    chained ogg/{vorbis,opus,flac} streams.
  ogg/{vorbis,flac,opus}: Remove header packets from subsequent ogg
    streams from the demuxer output.

 libavformat/oggdec.c                       |  26 +--
 libavformat/oggdec.h                       |   6 +
 libavformat/oggparseflac.c                 |  28 +++-
 libavformat/oggparseopus.c                 |  12 ++
 libavformat/oggparsevorbis.c               |   4 +-
 tests/Makefile                             |   4 +
 tests/api/Makefile                         |   2 +-
 tests/api/api-dump-stream-meta-test.c      | 177 +++++++++++++++++++++
 tests/fate/ogg-flac.mak                    |  11 ++
 tests/fate/ogg-opus.mak                    |  11 ++
 tests/fate/ogg-vorbis.mak                  |  11 ++
 tests/ref/fate/ogg-flac-chained-meta.txt   |  10 ++
 tests/ref/fate/ogg-opus-chained-meta.txt   |  26 +++
 tests/ref/fate/ogg-vorbis-chained-meta.txt |  14 ++
 14 files changed, 326 insertions(+), 16 deletions(-)
 create mode 100644 tests/api/api-dump-stream-meta-test.c
 create mode 100644 tests/fate/ogg-flac.mak
 create mode 100644 tests/fate/ogg-opus.mak
 create mode 100644 tests/fate/ogg-vorbis.mak
 create mode 100644 tests/ref/fate/ogg-flac-chained-meta.txt
 create mode 100644 tests/ref/fate/ogg-opus-chained-meta.txt
 create mode 100644 tests/ref/fate/ogg-vorbis-chained-meta.txt

-- 
2.39.5 (Apple Git-154)

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