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avcodec/escape124: Fix segfault with negative linesizes

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Use ptrdiff_t instead of unsigned for linesizes.
Fixes the armovie-escape124 FATE test with negative linesizes.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2022-09-30 18:25:04 +02:00
parent fced3a17db
commit fcfa6965e5
1 changed files with 3 additions and 3 deletions
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6
libavcodec/escape124.c
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@@ -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;