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WMA: fix loop unrolling in decode_exp_vlc()

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The count can be a non-multiple of 4 after all.

Originally committed as revision 20081 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-09-29 12:48:24 +00:00
parent a7adcf29cf
commit 0e71841b05
1 changed files with 12 additions and 12 deletions
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24
libavcodec/wmadec.c
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@ -330,12 +330,12 @@ static int decode_exp_vlc(WMACodecContext *s, int ch)
iv = iptab[last_exp];
max_scale = v;
n = *ptr++;
do {
*q++ = iv;
*q++ = iv;
*q++ = iv;
*q++ = iv;
} while (n -= 4);
switch (n & 3) do {
case 0: *q++ = iv;
case 3: *q++ = iv;
case 2: *q++ = iv;
case 1: *q++ = iv;
} while ((n -= 4) > 0);
}else
last_exp = 36;
@ -352,12 +352,12 @@ static int decode_exp_vlc(WMACodecContext *s, int ch)
if (v > max_scale)
max_scale = v;
n = *ptr++;
do {
*q++ = iv;
*q++ = iv;
*q++ = iv;
*q++ = iv;
} while (n -= 4);
switch (n & 3) do {
case 0: *q++ = iv;
case 3: *q++ = iv;
case 2: *q++ = iv;
case 1: *q++ = iv;
} while ((n -= 4) > 0);
}
s->max_exponent[ch] = max_scale;
return 0;