added frequency markers

app/build.gradle

@@ -4,12 +4,12 @@ plugins {
 
 android {
     namespace 'xdsopl.robot36'
-    compileSdk 35
+    compileSdk = 36
 
     defaultConfig {
         applicationId "xdsopl.robot36"
         minSdk 24
-        targetSdk 35
+        targetSdk 36
         versionCode 65
         versionName "2.15"
 

app/src/main/java/xdsopl/robot36/MainActivity.java

@@ -89,6 +89,8 @@ public class MainActivity extends AppCompatActivity {
 	private int tintColor;
 	private boolean autoSave;
 	private boolean showSpectrogram;
+	private final int binWidthHz = 10;
+	private final int[] freqMarkers = { 1100, 1300, 1500, 2300 };
 
 	private void setStatus(int id) {
 		setTitle(id);
@@ -223,8 +225,12 @@ public class MainActivity extends AppCompatActivity {
 				double lowest = Math.log(1e-9);
 				double highest = Math.log(1);
 				double range = highest - lowest;
+				int minFreq = 140;
+				int minBin = minFreq / binWidthHz;
 				for (int i = 0; i < stride; ++i)
-					waterfallPlotBuffer.pixels[line + i] = rainbow((Math.log(stft.power[i + 14]) - lowest) / range);
+					waterfallPlotBuffer.pixels[line + i] = rainbow((Math.log(stft.power[i + minBin]) - lowest) / range);
+				for (int freq : freqMarkers)
+					waterfallPlotBuffer.pixels[line + (freq - minFreq) / binWidthHz] = 0;
 				System.arraycopy(waterfallPlotBuffer.pixels, line, waterfallPlotBuffer.pixels, line + stride * (waterfallPlotBuffer.height / 2), stride);
 			}
 		}
@@ -315,7 +321,7 @@ public class MainActivity extends AppCompatActivity {
 				if (rateChanged) {
 					decoder = new Decoder(scopeBuffer, imageBuffer, getString(R.string.raw_mode), recordRate);
 					decoder.setMode(currentMode);
-					stft = new ShortTimeFourierTransform(recordRate / 10, 3);
+					stft = new ShortTimeFourierTransform(recordRate / binWidthHz, 3);
 				}
 				startListening();
 			} else {

gradle/libs.versions.toml

@@ -1,9 +1,9 @@
 [versions]
-agp = "8.9.0"
+agp = "8.12.1"
 junit = "4.13.2"
-junitVersion = "1.2.1"
+junitVersion = "1.3.0"
-espressoCore = "3.6.1"
+espressoCore = "3.7.0"
-appcompat = "1.7.0"
+appcompat = "1.7.1"
 material = "1.12.0"
 activity = "1.10.1"
 constraintlayout = "2.2.1"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Fri Apr 12 11:35:07 CEST 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists