[FFmpeg-devel] [PATCH v3 2/3] avcodec/jpeg2000dec: Add support for placeholder passes

[WATANABE Osamu]

Placeholder pass is a coding pass having zero length. It is necessary to keep pass boundaries of layers for the transcoding from HT to non HT codestream. It is defined in the spec of HTJ2K.

A detaled explanation is available at https://ds.jpeg.org/documents/jpeg2000/wg1n100680-101-COM-Guideline_on_Placeholder_Passes_and_Multiple_HT_Sets_in_HTJ2K_codestreams.zip


> 2024/06/24 18:34、Andreas Rheinhardt <andreas.rheinhardt at outlook.com>のメール:
> 
> ?Osamu Watanabe:
>> This commit adds support for placeholder pass parsing
>> 
> 
> What is a placeholder pass?
> 
>> Signed-off-by: Osamu Watanabe <owatanab at es.takushoku-u.ac.jp>
>> ---
>> libavcodec/jpeg2000.h      |   2 +
>> libavcodec/jpeg2000dec.c   | 292 +++++++++++++++++++++++++++++++------
>> libavcodec/jpeg2000htdec.c |  18 +--
>> 3 files changed, 257 insertions(+), 55 deletions(-)
>> 
> 
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