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no need for the delay line to be complex here

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This commit is contained in:
Ahmet Inan 2024-04-15 11:14:41 +02:00
parent b8441694a6
commit 08ef9d5f16
2 changed files with 9 additions and 4 deletions
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5
app/src/main/java/xdsopl/robot36/Complex.java
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@ -16,6 +16,11 @@ public class Complex {
this.real = real;
this.imag = imag;
}
Complex set(Complex other) {
real = other.real;
imag = other.imag;
return this;
}
Complex set(float real, float imag) {
this.real = real;
this.imag = imag;

8
app/src/main/java/xdsopl/robot36/MainActivity.java
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@ -37,7 +37,7 @@ public class MainActivity extends AppCompatActivity {
private float[] recordBuffer;
private AudioRecord audioRecord;
private TextView status;
private ComplexDelay powerDelay;
private Delay powerDelay;
private SimpleMovingAverage powerAvg;
private ComplexMovingAverage syncAvg;
private ComplexMovingAverage baseBandLowPass;
@ -67,8 +67,8 @@ public class MainActivity extends AppCompatActivity {
private void processSamples() {
for (float v : recordBuffer) {
baseBand = baseBandLowPass.avg(baseBand.set(v).mul(baseBandOscillator.rotate()));
syncPulse = syncAvg.avg(powerDelay.push(baseBand).mul(syncPulseOscillator.rotate()));
float level = syncPulse.norm() / powerAvg.avg(baseBand.norm());
syncPulse = syncAvg.avg(syncPulse.set(baseBand).mul(syncPulseOscillator.rotate()));
float level = powerDelay.push(syncPulse.norm()) / powerAvg.avg(baseBand.norm());
int x = Math.min((int) (scopeWidth * level), scopeWidth);
for (int i = 0; i < x; ++i)
scopePixels[scopeWidth * curLine + i] = tint;
@ -86,7 +86,7 @@ public class MainActivity extends AppCompatActivity {
double powerWindowSeconds = 0.5;
int powerWindowSamples = (int) Math.round(powerWindowSeconds * sampleRate) | 1;
powerAvg = new SimpleMovingAverage(powerWindowSamples);
powerDelay = new ComplexDelay((powerWindowSamples - 1) / 2);
powerDelay = new Delay((powerWindowSamples - 1) / 2);
double syncPulseSeconds = 0.009;
int syncPulseSamples = (int) Math.round(syncPulseSeconds * sampleRate);
syncAvg = new ComplexMovingAverage(syncPulseSamples);