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aac_ltp: actually signal LTP as off during EIGHT_SHORT windows 

This hugely reduces the echo which was introduced with the previous
commit (though likely because previously everything was broken).
Makes LTP actually worthwhile now.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
This commit is contained in:
Rostislav Pehlivanov 2015-11-26 18:20:42 +00:00
parent 1e5dbb3409
commit f5b7a29ae8
1 changed files with 3 additions and 1 deletions
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4
libavcodec/aacenc_ltp.c
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@ -135,8 +135,10 @@ void ff_aac_adjust_common_ltp(AACEncContext *s, ChannelElement *cpe)
if (!cpe->common_window ||
sce0->ics.window_sequence[0] == EIGHT_SHORT_SEQUENCE ||
sce1->ics.window_sequence[0] == EIGHT_SHORT_SEQUENCE)
sce1->ics.window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
sce0->ics.ltp.present = 0;
return;
}
for (sfb = 0; sfb < FFMIN(sce0->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++) {
int sum = sce0->ics.ltp.used[sfb] + sce1->ics.ltp.used[sfb];