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added simple Robot36 monochrome decoder

pull/11/head
Ahmet Inan 2024-04-20 12:29:28 +02:00
rodzic 00a9ddb21a
commit eceb792e8f
1 zmienionych plików z 24 dodań i 3 usunięć
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27
app/src/main/java/xdsopl/robot36/Robot_36_Color.java
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@ -8,6 +8,14 @@ package xdsopl.robot36;
public class Robot_36_Color implements Mode {
private final int scanLineSamples;
private final int luminanceSamples;
private final int separatorSamples;
private final int chrominanceSamples;
private final int beginSamples;
private final int luminanceBeginSamples;
private final int separatorBeginSamples;
private final int chrominanceBeginSamples;
private final int endSamples;
Robot_36_Color(int sampleRate) {
double syncPulseSeconds = 0.009;
@ -18,6 +26,19 @@ public class Robot_36_Color implements Mode {
double chrominanceSeconds = 0.044;
double scanLineSeconds = syncPulseSeconds + syncPorchSeconds + luminanceSeconds + separatorSeconds + porchSeconds + chrominanceSeconds;
scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
luminanceSamples = (int) Math.round(luminanceSeconds * sampleRate);
separatorSamples = (int) Math.round(separatorSeconds * sampleRate);
chrominanceSamples = (int) Math.round(chrominanceSeconds * sampleRate);
double luminanceBeginSeconds = syncPulseSeconds / 2 + syncPorchSeconds;
luminanceBeginSamples = (int) Math.round(luminanceBeginSeconds * sampleRate);
beginSamples = luminanceBeginSamples;
double separatorBeginSeconds = luminanceBeginSeconds + luminanceSeconds;
separatorBeginSamples = (int) Math.round(separatorBeginSeconds * sampleRate);
double separatorEndSeconds = separatorBeginSeconds + separatorSeconds;
double chrominanceBeginSeconds = separatorEndSeconds + porchSeconds;
chrominanceBeginSamples = (int) Math.round(chrominanceBeginSeconds * sampleRate);
double chrominanceEndSeconds = chrominanceBeginSeconds + chrominanceSeconds;
endSamples = (int) Math.round(chrominanceEndSeconds * sampleRate);
}
@Override
@ -32,11 +53,11 @@ public class Robot_36_Color implements Mode {
@Override
public int decodeScanLine(int[] evenBuffer, int[] oddBuffer, float[] scanLineBuffer, int prevPulseIndex, int scanLineSamples) {
if (prevPulseIndex < 0 || prevPulseIndex + scanLineSamples >= scanLineBuffer.length)
if (prevPulseIndex + beginSamples < 0 || prevPulseIndex + endSamples > scanLineBuffer.length)
return 0;
for (int i = 0; i < evenBuffer.length; ++i) {
int position = (i * scanLineSamples) / evenBuffer.length + prevPulseIndex;
evenBuffer[i] = ColorConverter.GRAY(scanLineBuffer[position]);
int yPos = luminanceBeginSamples + (i * luminanceSamples) / evenBuffer.length + prevPulseIndex;
evenBuffer[i] = ColorConverter.GRAY(scanLineBuffer[yPos]);
}
return 1;
}