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-rw-r--r--libavcodec/adxdec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/adxdec.c b/libavcodec/adxdec.c
index 1801c47ac8..c5a30b2b4e 100644
--- a/libavcodec/adxdec.c
+++ b/libavcodec/adxdec.c
@@ -90,9 +90,9 @@ static int adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,
ADXContext *c = avctx->priv_data;
int offset;
- if (buf[0] != 0x80)
+ if (AV_RB16(buf) != 0x8000)
return AVERROR_INVALIDDATA;
- offset = (AV_RB32(buf) ^ 0x80000000) + 4;
+ offset = AV_RB16(buf + 2) + 4;
if (bufsize < offset || memcmp(buf + offset - 6, "(c)CRI", 6))
return AVERROR_INVALIDDATA;