private void processPair(
CPE cpe, FilterBank filterBank, int channel, Profile profile, SampleFrequency sf)
throws AACException {
final ICStream ics1 = cpe.getLeftChannel();
final ICStream ics2 = cpe.getRightChannel();
final ICSInfo info1 = ics1.getInfo();
final ICSInfo info2 = ics2.getInfo();
final LTPrediction ltp1 = info1.getLTPrediction1();
final LTPrediction ltp2 =
cpe.isCommonWindow() ? info1.getLTPrediction2() : info2.getLTPrediction1();
final int elementID = cpe.getElementInstanceTag();
// inverse quantization
final float[] iqData1 = ics1.getInvQuantData();
final float[] iqData2 = ics2.getInvQuantData();
// MS
if (cpe.isCommonWindow() && cpe.isMSMaskPresent()) MS.process(cpe, iqData1, iqData2);
// main prediction
if (profile.equals(Profile.AAC_MAIN)) {
if (info1.isICPredictionPresent()) info1.getICPrediction().process(ics1, iqData1, sf);
if (info2.isICPredictionPresent()) info2.getICPrediction().process(ics2, iqData2, sf);
}
// IS
IS.process(cpe, iqData1, iqData2);
// LTP
if (LTPrediction.isLTPProfile(profile)) {
if (info1.isLTPrediction1Present()) ltp1.process(ics1, iqData1, filterBank, sf);
if (cpe.isCommonWindow() && info1.isLTPrediction2Present())
ltp2.process(ics2, iqData2, filterBank, sf);
else if (info2.isLTPrediction1Present()) ltp2.process(ics2, iqData2, filterBank, sf);
}
// dependent coupling
processDependentCoupling(true, elementID, CCE.BEFORE_TNS, iqData1, iqData2);
// TNS
if (ics1.isTNSDataPresent()) ics1.getTNS().process(ics1, iqData1, sf, false);
if (ics2.isTNSDataPresent()) ics2.getTNS().process(ics2, iqData2, sf, false);
// dependent coupling
processDependentCoupling(true, elementID, CCE.AFTER_TNS, iqData1, iqData2);
// filterbank
filterBank.process(
info1.getWindowSequence(),
info1.getWindowShape(ICSInfo.CURRENT),
info1.getWindowShape(ICSInfo.PREVIOUS),
iqData1,
data[channel],
channel);
filterBank.process(
info2.getWindowSequence(),
info2.getWindowShape(ICSInfo.CURRENT),
info2.getWindowShape(ICSInfo.PREVIOUS),
iqData2,
data[channel + 1],
channel + 1);
if (LTPrediction.isLTPProfile(profile)) {
ltp1.updateState(data[channel], filterBank.getOverlap(channel), profile);
ltp2.updateState(data[channel + 1], filterBank.getOverlap(channel + 1), profile);
}
// independent coupling
processIndependentCoupling(true, elementID, data[channel], data[channel + 1]);
// gain control
if (ics1.isGainControlPresent())
ics1.getGainControl()
.process(
iqData1,
info1.getWindowShape(ICSInfo.CURRENT),
info1.getWindowShape(ICSInfo.PREVIOUS),
info1.getWindowSequence());
if (ics2.isGainControlPresent())
ics2.getGainControl()
.process(
iqData2,
info2.getWindowShape(ICSInfo.CURRENT),
info2.getWindowShape(ICSInfo.PREVIOUS),
info2.getWindowSequence());
// SBR
if (sbrPresent && config.isSBREnabled()) {
if (data[channel].length == config.getFrameLength())
LOGGER.log(Level.WARNING, "SBR data present, but buffer has normal size!");
cpe.getSBR().process(data[channel], data[channel + 1]);
}
}
private int processSingle(
SCE_LFE scelfe, FilterBank filterBank, int channel, Profile profile, SampleFrequency sf)
throws AACException {
final ICStream ics = scelfe.getICStream();
final ICSInfo info = ics.getInfo();
final LTPrediction ltp = info.getLTPrediction1();
final int elementID = scelfe.getElementInstanceTag();
// inverse quantization
final float[] iqData = ics.getInvQuantData();
// prediction
if (profile.equals(Profile.AAC_MAIN) && info.isICPredictionPresent())
info.getICPrediction().process(ics, iqData, sf);
if (LTPrediction.isLTPProfile(profile) && info.isLTPrediction1Present())
ltp.process(ics, iqData, filterBank, sf);
// dependent coupling
processDependentCoupling(false, elementID, CCE.BEFORE_TNS, iqData, null);
// TNS
if (ics.isTNSDataPresent()) ics.getTNS().process(ics, iqData, sf, false);
// dependent coupling
processDependentCoupling(false, elementID, CCE.AFTER_TNS, iqData, null);
// filterbank
filterBank.process(
info.getWindowSequence(),
info.getWindowShape(ICSInfo.CURRENT),
info.getWindowShape(ICSInfo.PREVIOUS),
iqData,
data[channel],
channel);
if (LTPrediction.isLTPProfile(profile))
ltp.updateState(data[channel], filterBank.getOverlap(channel), profile);
// dependent coupling
processIndependentCoupling(false, elementID, data[channel], null);
// gain control
if (ics.isGainControlPresent())
ics.getGainControl()
.process(
iqData,
info.getWindowShape(ICSInfo.CURRENT),
info.getWindowShape(ICSInfo.PREVIOUS),
info.getWindowSequence());
// SBR
int chs = 1;
if (sbrPresent && config.isSBREnabled()) {
if (data[channel].length == config.getFrameLength())
LOGGER.log(Level.WARNING, "SBR data present, but buffer has normal size!");
final SBR sbr = scelfe.getSBR();
if (sbr.isPSUsed()) {
chs = 2;
scelfe.getSBR().process(data[channel], data[channel + 1]);
} else scelfe.getSBR().process(data[channel], null);
}
return chs;
}