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aac: Simplify decode_mid_side_stereo 

Might spare few cycles if the compiler is naive and
makes the function more readable.
This commit is contained in:
Luca Barbato 2014-11-21 12:57:36 +00:00 committed by Vittorio Giovara
parent e4a77dc204
commit 7464e98f74
1 changed files with 3 additions and 4 deletions
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7
libavcodec/aacdec.c
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@ -1419,13 +1419,12 @@ static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
int ms_present)
{
int idx;
int max_idx = cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
if (ms_present == 1) {
for (idx = 0;
idx < cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
idx++)
for (idx = 0; idx < max_idx; idx++)
cpe->ms_mask[idx] = get_bits1(gb);
} else if (ms_present == 2) {
memset(cpe->ms_mask, 1, cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb * sizeof(cpe->ms_mask[0]));
memset(cpe->ms_mask, 1, max_idx * sizeof(cpe->ms_mask[0]));
}
}