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Fix Theora decoding bug if loopfilter is completely disabled 

Bug caused by the fact that get_bits(gb, 0) is undefined.
Doesn't affect any streams generated by the official Theora encoder, but such
streams are nevertheless valid.

Fixes decoding of CELT-933dd833-nmr-bandt.ogv.

Originally committed as revision 25573 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jason Garrett-Glaser 2010-10-26 07:29:00 +00:00
parent 313b52fbff
commit 1a48a57071
1 changed files with 2 additions and 0 deletions
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2
libavcodec/vp3.c
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@ -2052,6 +2052,7 @@ static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
if (s->theora >= 0x030200) {
n = get_bits(gb, 3);
/* loop filter limit values table */
if (n) {
for (i = 0; i < 64; i++) {
s->filter_limit_values[i] = get_bits(gb, n);
if (s->filter_limit_values[i] > 127) {
@ -2059,6 +2060,7 @@ static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
s->filter_limit_values[i] = 127;
}
}
}
}
if (s->theora >= 0x030200)