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avcodec/rangecoder: Test for invalid corner case
[ffmpeg.git]
/
libavcodec
/
rangecoder.c
diff --git
a/libavcodec/rangecoder.c
b/libavcodec/rangecoder.c
index
9c6ef75
..
d7a2774
100644
(file)
--- a/
libavcodec/rangecoder.c
+++ b/
libavcodec/rangecoder.c
@@
-58,6
+58,10
@@
av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf,
c->low = AV_RB16(c->bytestream);
c->bytestream += 2;
+ if (c->low >= 0xFF00) {
+ c->low = 0xFF00;
+ c->bytestream_end = c->bytestream + 2;
+ }
}
void ff_build_rac_states(RangeCoder *c, int factor, int max_p)