Fix PTS produced by the default OPUS encoder

The default OPUS encoder on Android rewrites the PTS so that it exactly
matches the number of samples.

As a consequence:
 - audio clock drift is not compensated
 - hard silences are ignored

To fix this behavior, recreate the PTS based on the current time (after
encoding) and the packet duration.

app/src/audio_regulator.c

@@ -160,7 +160,6 @@ sc_audio_regulator_push(struct sc_audio_regulator *ar, const AVFrame *frame) {
         // Reset state
         ar->avg_buffering.avg = ar->target_buffering;
         int ret = swr_set_compensation(swr_ctx, 0, 0);
-        (void) ret;
         assert(!ret); // disabling compensation should never fail
         ar->compensation_active = false;
         ar->samples_since_resync = 0;

server/src/main/java/com/genymobile/scrcpy/audio/AudioEncoder.java

@@ -142,7 +142,6 @@ public final class AudioEncoder implements AsyncProcessor {
         long pts = bufferInfo.presentationTimeUs;
         if (previousPts != 0) {
             long now = System.nanoTime() / 1000;
-            // This specific encoder produces PTS matching the exact number of samples
             long duration = pts - previousPts;
             bufferInfo.presentationTimeUs = now - duration;
         }
@@ -219,11 +218,10 @@ public final class AudioEncoder implements AsyncProcessor {
             Codec codec = streamer.getCodec();
             mediaCodec = createMediaCodec(codec, encoderName);
 
-            // The default OPUS and FLAC encoders overwrite the input PTS with a value that matches the number of samples. This is not the behavior
-            // we want: it ignores any audio clock drift and hard silences (packets not produced on silence). To work around this behavior,
-            // regenerate PTS based on the current time and the packet duration.
-            String codecName = mediaCodec.getCanonicalName();
-            recreatePts = "c2.android.opus.encoder".equals(codecName) || "c2.android.flac.encoder".equals(codecName);
+            // The default OPUS encoder generates its own input PTS which matches the number of samples. This is not the behavior we want: it
+            // ignores any audio clock drift and hard silences (packets not produced on silence). To fix this behavior, regenerate PTS based on the
+            // current time and the packet duration.
+            recreatePts = "c2.android.opus.encoder".equals(mediaCodec.getName());
 
             mediaCodecThread = new HandlerThread("media-codec");
             mediaCodecThread.start();

server/src/main/java/com/genymobile/scrcpy/audio/AudioSource.java

@@ -13,8 +13,8 @@ public enum AudioSource {
     MIC_VOICE_RECOGNITION("mic-voice-recognition", MediaRecorder.AudioSource.VOICE_RECOGNITION),
     MIC_VOICE_COMMUNICATION("mic-voice-communication", MediaRecorder.AudioSource.VOICE_COMMUNICATION),
     VOICE_CALL("voice-call", MediaRecorder.AudioSource.VOICE_CALL),
-    VOICE_CALL_UPLINK("voice-call-uplink", MediaRecorder.AudioSource.VOICE_UPLINK),
-    VOICE_CALL_DOWNLINK("voice-call-downlink", MediaRecorder.AudioSource.VOICE_DOWNLINK),
+    VOICE_CALL_UPLINK("voice-call-uplink", MediaRecorder.AudioSource.VOICE_CALL),
+    VOICE_CALL_DOWNLINK("voice-call-downlink", MediaRecorder.AudioSource.VOICE_CALL),
     VOICE_PERFORMANCE("voice-performance", MediaRecorder.AudioSource.VOICE_PERFORMANCE);
 
     private final String name;

server/src/main/java/com/genymobile/scrcpy/video/DisplaySizeMonitor.java

@@ -23,9 +23,7 @@ public class DisplaySizeMonitor {
 
     // On Android 14, DisplayListener may be broken (it never sends events). This is fixed in recent Android 14 upgrades, but we can't really
     // detect it directly, so register a DisplayWindowListener (introduced in Android 11) to listen to configuration changes instead.
-    // It has been broken again after an Android 15 upgrade: <https://github.com/Genymobile/scrcpy/issues/5908>
-    // So use the default method only before Android 14.
-    private static final boolean USE_DEFAULT_METHOD = Build.VERSION.SDK_INT < AndroidVersions.API_34_ANDROID_14;
+    private static final boolean USE_DEFAULT_METHOD = Build.VERSION.SDK_INT != AndroidVersions.API_34_ANDROID_14;
 
     private DisplayManager.DisplayListenerHandle displayListenerHandle;
     private HandlerThread handlerThread;