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added Robot36 color decoder

pull/11/head
Ahmet Inan 2024-04-20 14:57:28 +02:00
rodzic eceb792e8f
commit 1a0c2e5aaf
2 zmienionych plików z 19 dodań i 3 usunięć
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4
app/src/main/java/xdsopl/robot36/ColorConverter.java
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@ -47,4 +47,8 @@ public final class ColorConverter {
public static int YUV2RGB(float Y, float U, float V) { public static int YUV2RGB(float Y, float U, float V) {
return YUV2RGB(float2int(Y), float2int(U), float2int(V)); return YUV2RGB(float2int(Y), float2int(U), float2int(V));
} }
public static int YUV2RGB(int YUV) {
return YUV2RGB((YUV & 0x00ff0000) >> 16, (YUV & 0x0000ff00) >> 8, YUV & 0x000000ff);
}
} }

18
app/src/main/java/xdsopl/robot36/Robot_36_Color.java
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@ -55,10 +55,22 @@ public class Robot_36_Color implements Mode {
public int decodeScanLine(int[] evenBuffer, int[] oddBuffer, float[] scanLineBuffer, int prevPulseIndex, int scanLineSamples) { public int decodeScanLine(int[] evenBuffer, int[] oddBuffer, float[] scanLineBuffer, int prevPulseIndex, int scanLineSamples) {
if (prevPulseIndex + beginSamples < 0 || prevPulseIndex + endSamples > scanLineBuffer.length) if (prevPulseIndex + beginSamples < 0 || prevPulseIndex + endSamples > scanLineBuffer.length)
return 0; return 0;
float separator = 0;
for (int i = 0; i < separatorSamples; ++i)
separator += scanLineBuffer[prevPulseIndex + separatorBeginSamples + i];
separator /= separatorSamples;
boolean even = separator < 0.5f;
for (int i = 0; i < evenBuffer.length; ++i) { for (int i = 0; i < evenBuffer.length; ++i) {
int yPos = luminanceBeginSamples + (i * luminanceSamples) / evenBuffer.length + prevPulseIndex; int luminancePos = luminanceBeginSamples + (i * luminanceSamples) / evenBuffer.length + prevPulseIndex;
evenBuffer[i] = ColorConverter.GRAY(scanLineBuffer[yPos]); int chrominancePos = chrominanceBeginSamples + (i * chrominanceSamples) / evenBuffer.length + prevPulseIndex;
if (even) {
evenBuffer[i] = ColorConverter.RGB(scanLineBuffer[luminancePos], 0, scanLineBuffer[chrominancePos]);
} else {
oddBuffer[i] = ColorConverter.RGB(scanLineBuffer[luminancePos], scanLineBuffer[chrominancePos], 0);
evenBuffer[i] = ColorConverter.YUV2RGB(evenBuffer[i] | (oddBuffer[i] & 0x0000ff00));
oddBuffer[i] = ColorConverter.YUV2RGB(oddBuffer[i] | (evenBuffer[i] & 0x000000ff));
} }
return 1; }
return even ? 0 : 2;
} }
} }