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avcodec/smcenc: make sure ny/nx are >= 0

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This commit is contained in:
Paul B Mahol 2024-06-18 09:41:37 +02:00
parent 8d12c7ab72
commit 5ad38785e7
1 changed files with 2 additions and 2 deletions
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4
libavcodec/smcenc.c
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@ -184,8 +184,8 @@ static void smc_encode_stream(SMCContext *s, const AVFrame *frame,
const ptrdiff_t offset = xpixel_ptr - src_pixels;
const int sy = offset / stride;
const int sx = offset % stride;
const int ny = sx < 4 ? sy - 4 : sy;
const int nx = sx < 4 ? width - 4 + (width & 3) : sx - 4;
const int ny = sx < 4 ? FFMAX(sy - 4, 0) : sy;
const int nx = sx < 4 ? FFMAX(width - 4 + (width & 3), 0) : sx - 4;
const uint8_t *old_pixel_ptr = src_pixels + nx + ny * stride;
int compare = 0;