public void process(FilterBank filterBank) throws AACException {
final Profile profile = config.getProfile();
final SampleFrequency sf = config.getSampleFrequency();
// final ChannelConfiguration channels = config.getChannelConfiguration();
int chs = config.getChannelConfiguration().getChannelCount();
if (chs == 1 && psPresent) chs++;
final int mult = sbrPresent ? 2 : 1;
// only reallocate if needed
if (data == null || chs != data.length || (mult * config.getFrameLength()) != data[0].length)
data = new float[chs][mult * config.getFrameLength()];
int channel = 0;
Element e;
SCE_LFE scelfe;
CPE cpe;
for (int i = 0; i < elements.length && channel < chs; i++) {
e = elements[i];
if (e == null) continue;
if (e instanceof SCE_LFE) {
scelfe = (SCE_LFE) e;
channel += processSingle(scelfe, filterBank, channel, profile, sf);
} else if (e instanceof CPE) {
cpe = (CPE) e;
processPair(cpe, filterBank, channel, profile, sf);
channel += 2;
} else if (e instanceof CCE) {
// applies invquant and save the result in the CCE
((CCE) e).process();
channel++;
}
}
}
public void decode(BitStream in) throws AACException {
final int start = in.getPosition(); // should be 0
int type;
Element prev = null;
boolean content = true;
if (!config.getProfile().isErrorResilientProfile()) {
while (content && (type = in.readBits(3)) != ELEMENT_END) {
switch (type) {
case ELEMENT_SCE:
case ELEMENT_LFE:
LOGGER.finest("SCE");
prev = decodeSCE_LFE(in);
break;
case ELEMENT_CPE:
LOGGER.finest("CPE");
prev = decodeCPE(in);
break;
case ELEMENT_CCE:
LOGGER.finest("CCE");
decodeCCE(in);
prev = null;
break;
case ELEMENT_DSE:
LOGGER.finest("DSE");
decodeDSE(in);
prev = null;
break;
case ELEMENT_PCE:
LOGGER.finest("PCE");
decodePCE(in);
prev = null;
break;
case ELEMENT_FIL:
LOGGER.finest("FIL");
decodeFIL(in, prev);
prev = null;
break;
}
}
LOGGER.finest("END");
content = false;
prev = null;
} else {
// error resilient raw data block
switch (config.getChannelConfiguration()) {
case CHANNEL_CONFIG_MONO:
decodeSCE_LFE(in);
break;
case CHANNEL_CONFIG_STEREO:
decodeCPE(in);
break;
case CHANNEL_CONFIG_STEREO_PLUS_CENTER:
decodeSCE_LFE(in);
decodeCPE(in);
break;
case CHANNEL_CONFIG_STEREO_PLUS_CENTER_PLUS_REAR_MONO:
decodeSCE_LFE(in);
decodeCPE(in);
decodeSCE_LFE(in);
break;
case CHANNEL_CONFIG_FIVE:
decodeSCE_LFE(in);
decodeCPE(in);
decodeCPE(in);
break;
case CHANNEL_CONFIG_FIVE_PLUS_ONE:
decodeSCE_LFE(in);
decodeCPE(in);
decodeCPE(in);
decodeSCE_LFE(in);
break;
case CHANNEL_CONFIG_SEVEN_PLUS_ONE:
decodeSCE_LFE(in);
decodeCPE(in);
decodeCPE(in);
decodeCPE(in);
decodeSCE_LFE(in);
break;
default:
throw new AACException(
"unsupported channel configuration for error resilience: "
+ config.getChannelConfiguration());
}
}
in.byteAlign();
bitsRead = in.getPosition() - start;
}