[FFmpeg-cvslog] avcodec/escape124: Fix segfault with negative linesizes
Andreas Rheinhardt
git at videolan.org
Wed Oct 5 15:49:44 EEST 2022
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Fri Sep 30 18:25:04 2022 +0200| [fcfa6965e5e398a850d87a276b0deb5dc5d1525e] | committer: Andreas Rheinhardt
avcodec/escape124: Fix segfault with negative linesizes
Use ptrdiff_t instead of unsigned for linesizes.
Fixes the armovie-escape124 FATE test with negative linesizes.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fcfa6965e5e398a850d87a276b0deb5dc5d1525e
---
libavcodec/escape124.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libavcodec/escape124.c b/libavcodec/escape124.c
index eeeb9bb0f7..024eec59ce 100644
--- a/libavcodec/escape124.c
+++ b/libavcodec/escape124.c
@@ -178,8 +178,8 @@ static void insert_mb_into_sb(SuperBlock* sb, MacroBlock mb, unsigned index) {
dst[4] = mb.pixels32[1];
}
-static void copy_superblock(uint16_t* dest, unsigned dest_stride,
- uint16_t* src, unsigned src_stride)
+static void copy_superblock(uint16_t* dest, ptrdiff_t dest_stride,
+ uint16_t* src, ptrdiff_t src_stride)
{
unsigned y;
if (src)
@@ -211,7 +211,7 @@ static int escape124_decode_frame(AVCodecContext *avctx, AVFrame *frame,
superblocks_per_row = avctx->width / 8, skip = -1;
uint16_t* old_frame_data, *new_frame_data;
- unsigned old_stride, new_stride;
+ ptrdiff_t old_stride, new_stride;
int ret;
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