fix: pulseaudio sample rate by detecting optimal system value

app/src/main/java/com/winlator/xenvironment/components/PulseAudioComponent.java

@@ -1,6 +1,7 @@
 package com.winlator.xenvironment.components;
 
 import android.content.Context;
+import android.media.AudioManager;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Process;
@@ -27,13 +28,33 @@ public class PulseAudioComponent extends EnvironmentComponent {
     private final Object lock = new Object();
     private float volume = 1.0f;
     private byte performanceMode = 1;
-    private int sampleRate = 48000;
     private boolean isPaused = false;
 
     public PulseAudioComponent(UnixSocketConfig socketConfig) {
         this.socketConfig = socketConfig;
     }
 
+    // Add this method to detect optimal sample rate
+    private int getOptimalSampleRate() {
+        final int fallbackSampleRate = 44100;
+        AudioManager audioManager = (AudioManager) environment.getContext().getSystemService(Context.AUDIO_SERVICE);
+        if (audioManager == null) {
+            return fallbackSampleRate;
+        }
+
+        String rate = audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
+        if (rate == null) {
+            return fallbackSampleRate;
+        }
+
+        try {
+            int parsed = Integer.parseInt(rate.trim());
+            return parsed > 0 ? parsed : fallbackSampleRate;
+        } catch (NumberFormatException ignored) {
+            return fallbackSampleRate;
+        }
+    }
+
     @Override
     public void start() {
         Log.d("PulseAudioComponent", "Starting...");
@@ -137,11 +158,9 @@ public void setPerformanceMode(int performanceMode) {
         this.performanceMode = (byte) performanceMode;
     }
 
-    public void setSampleRate(int sampleRate) {
-        this.sampleRate = sampleRate;
-    }
-
     private java.lang.Process execPulseAudio() {
+        final int bitRate = getOptimalSampleRate();
+
         Context context = environment.getContext();
         String nativeLibraryDir = context.getApplicationInfo().nativeLibraryDir;
         // nativeLibraryDir = nativeLibraryDir.replace("arm64", "arm64-v8a");
@@ -154,7 +173,7 @@ private java.lang.Process execPulseAudio() {
         File configFile = new File(workingDir, "default.pa");
         FileUtils.writeString(configFile, String.join("\n",
                 "load-module module-native-protocol-unix auth-anonymous=1 auth-cookie-enabled=0 socket=\""+socketConfig.path+"\"",
-                "load-module module-aaudio-sink volume=" + this.volume + " performance_mode=" + ((int) this.performanceMode) + " rate=" + this.sampleRate,
+                "load-module module-aaudio-sink volume=" + this.volume + " performance_mode=" + ((int) this.performanceMode) + " rate=" + bitRate,
                 "set-default-sink AAudioSink"
         ));
 
@@ -176,6 +195,9 @@ private java.lang.Process execPulseAudio() {
         command += " --use-pid-file=false";
         command += " --exit-idle-time=-1";
 
+        // Uncomment to enable verbose log in pulseaudio
+        //command += " -vvv";
+
         return ProcessHelper.startProcess(command, envVars.toStringArray(), workingDir);
     }