Temporary fix for gapless regression for MP3.

PiperOrigin-RevId: 315334491

library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecRenderer.java

@@ -1391,8 +1391,15 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
       formatQueue.add(presentationTimeUs, inputFormat);
       formatQueue.add(presentationTimeUs, inputFormat);
       waitingForFirstSampleInFormat = false;
       waitingForFirstSampleInFormat = false;
     }
     }
-    largestQueuedPresentationTimeUs = Math.max(largestQueuedPresentationTimeUs, presentationTimeUs);
 
 
+    // TODO(b/158483277): Find the root cause of why a gap is introduced in MP3 playback when using
+    // presentationTimeUs from the c2Mp3TimestampTracker.
+    if (c2Mp3TimestampTracker != null) {
+      largestQueuedPresentationTimeUs = Math.max(largestQueuedPresentationTimeUs, buffer.timeUs);
+    } else {
+      largestQueuedPresentationTimeUs =
+          Math.max(largestQueuedPresentationTimeUs, presentationTimeUs);
+    }
     buffer.flip();
     buffer.flip();
     if (buffer.hasSupplementalData()) {
     if (buffer.hasSupplementalData()) {
       handleInputBufferSupplementalData(buffer);
       handleInputBufferSupplementalData(buffer);