[FFmpeg-devel] [PATCH 1/1] lavc/exr: decode_block() fails when input resolution not exactly divisable by 8

From: tonetechnician@gmail.com
To: ffmpeg-devel@ffmpeg.org
Cc: Sean Devonport <tonetechnician@gmail.com>
Subject: [FFmpeg-devel] [PATCH 1/1] lavc/exr: decode_block() fails when input resolution not exactly divisable by 8
Date: Fri, 26 Jul 2024 16:58:43 +0200
Message-ID: <20240726145843.68774-2-tonetechnician@gmail.com> (raw)
In-Reply-To: <20240726145843.68774-1-tonetechnician@gmail.com>

From: Sean Devonport <tonetechnician@gmail.com>

This stops decode_block() from failing when the .exr resolution is not divisable by 8 (e.g 108x192).
The dc_w and dc_h needs to be round up and not down.
---
 libavcodec/exr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index 4bac0be89b..5df2c55609 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -987,8 +987,8 @@ static int dwa_uncompress(const EXRContext *s, const uint8_t *src, int compresse
     int64_t version, lo_usize, lo_size;
     int64_t ac_size, dc_size, rle_usize, rle_csize, rle_raw_size;
     int64_t ac_count, dc_count, ac_compression;
-    const int dc_w = td->xsize >> 3;
-    const int dc_h = td->ysize >> 3;
+    const int dc_w = (td->xsize + 7) >> 3;
+    const int dc_h = (td->ysize + 7) >> 3;
     GetByteContext gb, agb;
     int skip, ret;
 
-- 
2.39.3 (Apple Git-146)

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