* [FFmpeg-devel] [PATCH] lavc/j2kdec: Do not ignore colour association for packed formats (PR #21092)
@ 2025-12-03 15:42 Valerii Zapodovnikov via ffmpeg-devel
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From: Valerii Zapodovnikov via ffmpeg-devel @ 2025-12-03 15:42 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: Valerii Zapodovnikov
PR #21092 opened by Valerii Zapodovnikov (Balling)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21092
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21092.patch
Fixes ticket #9468.
Easy to see of you
ffplay https://trac.ffmpeg.org/raw-attachment/ticket/9468/dg2img-3f096fe9d00296bc3734ac4f01b5bf60.j2k
>From 2f802a6b6463066aea6a7514bac9a4e5231542a6 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffmpeg@gmail.com>
Date: Wed, 3 Dec 2025 18:39:12 +0300
Subject: [PATCH] lavc/j2kdec: Do not ignore colour association for packed
formats
Fixes ticket #9468.
---
libavcodec/jpeg2000dec.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index de1a73b92b..203b0f6cb7 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -2360,7 +2360,8 @@ static inline int tile_codeblocks(const Jpeg2000DecoderContext *s, Jpeg2000Tile
\
x = tile->comp[compno].coord[0][0] - \
ff_jpeg2000_ceildiv(s->image_offset_x, s->cdx[compno]); \
- dst = line + x * pixelsize + compno*!planar; \
+ dst = line + x * pixelsize + \
+ (s->cdef[compno] ? s->cdef[compno] - 1 : compno) * !planar; \
\
if (codsty->transform == FF_DWT97) { \
for (; x < w; x++) { \
--
2.49.1
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2025-12-03 15:42 [FFmpeg-devel] [PATCH] lavc/j2kdec: Do not ignore colour association for packed formats (PR #21092) Valerii Zapodovnikov via ffmpeg-devel
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