From ab31b46b89362041a8e37cb0aac67cf3b53c2524 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sat, 24 Dec 2016 10:26:27 +0100 Subject: [PATCH] avcodec/pixlet: avoid some overflows Signed-off-by: Paul B Mahol --- libavcodec/pixlet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index 1755fb81fb..e78b666359 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -246,7 +246,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i value = 0; } else { xflag &= 1u; - tmp = c * ((yflag + 1) >> 1) + (c >> 1); + tmp = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1); value = xflag + (tmp ^ -xflag); } @@ -256,7 +256,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i j = 0; dst += stride; } - state += d * yflag - (d * state >> 8); + state += (int64_t)d * yflag - (d * state >> 8); flag = 0;