public void setEqualizer(Equalizer eq) {
if (eq == null) eq = Equalizer.PASS_THRU_EQ;
equalizer.setFrom(eq);
float[] factors = equalizer.getBandFactors();
if (filter1 != null) filter1.setEQ(factors);
if (filter2 != null) filter2.setEQ(factors);
}
private void initializeSynthesizer() {
float af[] = equalizer.getBands();
filter1 = new Synthesizer(0, af);
if (outputChannels == 2) {
filter2 = new Synthesizer(1, af);
}
}
/**
* Creates a new <code>Decoder</code> instance with default parameters.
*
* @param params The <code>Params</code> instance that describes the customizable aspects of the
* decoder.
*/
public Decoder(Params params0) {
if (params0 == null) params0 = DEFAULT_PARAMS;
params = params0;
Equalizer eq = params.getInitialEqualizerSettings();
if (eq != null) {
equalizer.setFrom(eq);
}
}
/**
* Sets the equalizer.
*
* @param f the equalizer
*/
final void setEqualizer(Object f) {
if (spline == null) {
spline = new Spline();
}
equalizer = new Equalizer(f, spline, information);
float af[] = equalizer.getBands();
if (filter1 != null) {
filter1.setEQ(af);
}
if (filter2 != null) {
filter2.setEQ(af);
}
information.put(FA_EQUALIZE, f);
}
/** Frees all system resources, which are bounded to this object. */
@Override
public void close() {
super.close();
if (filter1 != null) {
filter1.close();
}
filter1 = null;
if (filter2 != null) {
filter2.close();
}
filter2 = null;
if (equalizer != null) {
equalizer.close();
}
equalizer = null;
if (spline != null) {
spline.close();
}
spline = null;
}
private void initialize(Header header) throws DecoderException {
// REVIEW: allow customizable scale factor
float scalefactor = 32700.0f;
int mode = header.mode();
int layer = header.layer();
int channels = mode == Header.SINGLE_CHANNEL ? 1 : 2;
// set up output buffer if not set up by client.
if (output == null) output = new SampleBuffer(header.frequency(), channels);
float[] factors = equalizer.getBandFactors();
filter1 = new SynthesisFilter(0, scalefactor, factors);
// REVIEW: allow mono output for stereo
if (channels == 2) filter2 = new SynthesisFilter(1, scalefactor, factors);
outputChannels = channels;
outputFrequency = header.frequency();
initialized = true;
}