Hopefully fixed lockup bug.

pymumble_py3/soundoutput.py

@@ -161,14 +161,27 @@ class SoundOutput:
         samples = int(self.encoder_framesize * PYMUMBLE_SAMPLERATE * 2 * self.channels)  # number of samples in an encoder frame
 
         self.lock.acquire()
-        if len(self.pcm) and len(self.pcm[-1]) < samples:
-            initial_offset = samples - len(self.pcm[-1])
-            self.pcm[-1] += pcm[:initial_offset]
-        else:
-            initial_offset = 0
-        for i in range(initial_offset, len(pcm), samples):
-            self.pcm.append(pcm[i:i + samples])
-        self.lock.release()
+        try:
+            # Prevent unbounded buffer growth - limit to 10 seconds of audio
+            max_buffer_seconds = 10.0
+            max_buffer_frames = int(max_buffer_seconds / self.encoder_framesize)
+            
+            # If buffer is too full, drop oldest frames to prevent memory leak
+            if len(self.pcm) > max_buffer_frames:
+                frames_to_drop = len(self.pcm) - max_buffer_frames
+                self.pcm = self.pcm[frames_to_drop:]
+                if hasattr(self, 'Log'):
+                    self.Log.warning(f"Audio buffer overflow, dropped {frames_to_drop} frames")
+            
+            if len(self.pcm) and len(self.pcm[-1]) < samples:
+                initial_offset = samples - len(self.pcm[-1])
+                self.pcm[-1] += pcm[:initial_offset]
+            else:
+                initial_offset = 0
+            for i in range(initial_offset, len(pcm), samples):
+                self.pcm.append(pcm[i:i + samples])
+        finally:
+            self.lock.release()
 
     def clear_buffer(self):
         self.lock.acquire()