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AAC: hoist dependent gain lookup out of the loop 

Originally committed as revision 17835 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2009-03-05 23:10:22 +00:00
parent 6a7d2c3d3a
commit cfd937b081
1 changed files with 2 additions and 1 deletions
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3
libavcodec/aac.c
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@ -1434,10 +1434,11 @@ static void apply_dependent_coupling(AACContext * ac, SingleChannelElement * tar
for (g = 0; g < ics->num_window_groups; g++) { for (g = 0; g < ics->num_window_groups; g++) {
for (i = 0; i < ics->max_sfb; i++, idx++) { for (i = 0; i < ics->max_sfb; i++, idx++) {
if (cce->ch[0].band_type[idx] != ZERO_BT) { if (cce->ch[0].band_type[idx] != ZERO_BT) {
const float gain = cce->coup.gain[index][idx];
for (group = 0; group < ics->group_len[g]; group++) { for (group = 0; group < ics->group_len[g]; group++) {
for (k = offsets[i]; k < offsets[i+1]; k++) { for (k = offsets[i]; k < offsets[i+1]; k++) {
// XXX dsputil-ize // XXX dsputil-ize
dest[group*128+k] += cce->coup.gain[index][idx] * src[group*128+k]; dest[group*128+k] += gain * src[group*128+k];
} }
} }
} }