public static void main(String[] args) throws Exception {
SoftSynthesizer synth = new SoftSynthesizer();
synth.openStream(new AudioFormat(44100, 16, 1, true, false), null);
SoftAudioBuffer in1 = new SoftAudioBuffer(250, synth.getFormat());
SoftAudioBuffer out1 = new SoftAudioBuffer(250, synth.getFormat());
float[] testdata1 = new float[in1.getSize()];
float[] n1a = in1.array();
float[] out1a = out1.array();
for (int i = 0; i < n1a.length; i++) {
testdata1[i] = (float) Math.sin(i * 0.3) * 0.9f;
n1a[i] = testdata1[i];
out1a[i] = 1;
}
SoftLimiter limiter = new SoftLimiter();
limiter.init(44100, 147);
limiter.setMixMode(false);
limiter.setInput(0, in1);
limiter.setOutput(0, out1);
limiter.processControlLogic();
limiter.processAudio();
limiter.processControlLogic();
limiter.processAudio();
// Limiter should delay audio by one buffer,
// and there should almost no different in output v.s. input
for (int i = 0; i < n1a.length; i++) {
if (Math.abs(out1a[i] - testdata1[i]) > 0.00001) throw new Exception("input != output");
}
synth.close();
}
protected void mixAudioStream(
SoftAudioBuffer in, SoftAudioBuffer out, float amp_from, float amp_to) {
int bufferlen = in.getSize();
if (amp_from < 0.000000001 && amp_to < 0.000000001) return;
if (amp_from == amp_to) {
float[] fout = out.array();
float[] fin = in.array();
for (int i = 0; i < bufferlen; i++) fout[i] += fin[i] * amp_to;
} else {
float amp = amp_from;
float amp_delta = (amp_to - amp_from) / bufferlen;
float[] fout = out.array();
float[] fin = in.array();
for (int i = 0; i < bufferlen; i++) {
amp += amp_delta;
fout[i] += fin[i] * amp;
}
}
}