From b68a66b4cec965224e156e04250ef32b3442621f Mon Sep 17 00:00:00 2001
From: Ahmet Inan <xdsopl@gmail.com>
Date: Fri, 19 Apr 2024 18:34:16 +0200
Subject: [PATCH] added decoder for Martin

---
 app/src/main/java/xdsopl/robot36/Martin.java | 31 ++++++++++++++++----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/xdsopl/robot36/Martin.java b/app/src/main/java/xdsopl/robot36/Martin.java
index 6b062e5..b8de05e 100644
--- a/app/src/main/java/xdsopl/robot36/Martin.java
+++ b/app/src/main/java/xdsopl/robot36/Martin.java
@@ -8,6 +8,11 @@ package xdsopl.robot36;
 
 public class Martin implements Mode {
 	private final int scanLineSamples;
+	private final int channelSamples;
+	private final int greenBeginSamples;
+	private final int blueBeginSamples;
+	private final int redBeginSamples;
+	private final int redEndSamples;
 	private final String name;
 
 	Martin(String name, double channelSeconds, int sampleRate) {
@@ -16,6 +21,17 @@ public class Martin implements Mode {
 		double separatorSeconds = 0.000572;
 		double scanLineSeconds = syncPulseSeconds + separatorSeconds + 3 * (channelSeconds + separatorSeconds);
 		scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
+		channelSamples = (int) Math.round(channelSeconds * sampleRate);
+		double greenBeginSeconds = syncPulseSeconds / 2 + separatorSeconds;
+		greenBeginSamples = (int) Math.round(greenBeginSeconds * sampleRate);
+		double greenEndSeconds = greenBeginSeconds + channelSeconds;
+		double blueBeginSeconds = greenEndSeconds + separatorSeconds;
+		blueBeginSamples = (int) Math.round(blueBeginSeconds * sampleRate);
+		double blueEndSeconds = blueBeginSeconds + channelSeconds;
+		double redBeginSeconds = blueEndSeconds + separatorSeconds;
+		redBeginSamples = (int) Math.round(redBeginSeconds * sampleRate);
+		double redEndSeconds = redBeginSeconds + channelSeconds;
+		redEndSamples = (int) Math.round(redEndSeconds * sampleRate);
 	}
 
 	@Override
@@ -29,13 +45,18 @@ public class Martin implements Mode {
 	}
 
 	@Override
-	public boolean decodeScanLine(int[] pixelBuffer, float[] scanLineBuffer, int prevPulseIndex, int scanLineSamples) {
-		if (prevPulseIndex < 0 || prevPulseIndex + scanLineSamples >= scanLineBuffer.length)
+	public boolean decodeScanLine(int[] pixelBuffer, float[] scanLineBuffer, int prevPulseIndex, int ignore) {
+		if (prevPulseIndex + greenBeginSamples < 0 || prevPulseIndex + redEndSamples > scanLineBuffer.length)
 			return false;
 		for (int i = 0; i < pixelBuffer.length; ++i) {
-			int position = (i * scanLineSamples) / pixelBuffer.length + prevPulseIndex;
-			int intensity = (int) Math.round(255 * Math.sqrt(scanLineBuffer[position]));
-			int pixelColor = 0xff000000 | 0x00010101 * intensity;
+			int position = (i * channelSamples) / pixelBuffer.length + prevPulseIndex;
+			int greenPos = position + greenBeginSamples;
+			int bluePos = position + blueBeginSamples;
+			int redPos = position + redBeginSamples;
+			int green = Math.round(255 * scanLineBuffer[greenPos]);
+			int blue = Math.round(255 * scanLineBuffer[bluePos]);
+			int red = Math.round(255 * scanLineBuffer[redPos]);
+			int pixelColor = 0xff000000 | (red << 16) | (green << 8) | blue;
 			pixelBuffer[i] = pixelColor;
 		}
 		return true;