Return the correct output buffer from audio processing pipeline

PiperOrigin-RevId: 554851456

libraries/common/src/main/java/androidx/media3/common/audio/AudioProcessingPipeline.java

@@ -222,10 +222,12 @@ public final class AudioProcessingPipeline {
       return EMPTY_BUFFER;
     }
     ByteBuffer outputBuffer = outputBuffers[getFinalOutputBufferIndex()];
-    if (!outputBuffer.hasRemaining()) {
-      processData(EMPTY_BUFFER);
+    if (outputBuffer.hasRemaining()) {
+      return outputBuffer;
     }
-    return outputBuffer;
+
+    processData(EMPTY_BUFFER);
+    return outputBuffers[getFinalOutputBufferIndex()];
   }
 
   /**

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.audio_then_silence_with_effects.dump

@@ -2132,16 +2132,16 @@ sample:
   presentationTimeUs = 3145020
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
-  size = 4320
+  dataHashCode = -738966527
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 3165020
 sample:
   trackIndex = 1
-  dataHashCode = -738966527
-  size = 8160
+  dataHashCode = 202646529
+  size = 4320
   isKeyFrame = true
-  presentationTimeUs = 3187520
+  presentationTimeUs = 3207520
 sample:
   trackIndex = 1
   dataHashCode = -1017110527
@@ -2186,16 +2186,10 @@ sample:
   presentationTimeUs = 3357520
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
-  size = 4320
+  dataHashCode = -738966527
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 3377520
-sample:
-  trackIndex = 1
-  dataHashCode = -1017110527
-  size = 3840
-  isKeyFrame = true
-  presentationTimeUs = 3400020
 sample:
   trackIndex = 1
   dataHashCode = 202646529
@@ -2228,16 +2222,16 @@ sample:
   presentationTimeUs = 3500000
 sample:
   trackIndex = 1
-  dataHashCode = -738966527
-  size = 8160
+  dataHashCode = 202646529
+  size = 4320
   isKeyFrame = true
   presentationTimeUs = 3527520
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
-  size = 4320
+  dataHashCode = -738966527
+  size = 8160
   isKeyFrame = true
-  presentationTimeUs = 3570020
+  presentationTimeUs = 3550020
 sample:
   trackIndex = 1
   dataHashCode = -1017110527
@@ -2336,16 +2330,10 @@ sample:
   presentationTimeUs = 3932520
 sample:
   trackIndex = 1
-  dataHashCode = 304617473
-  size = 2880
+  dataHashCode = -422154111
+  size = 8636
   isKeyFrame = true
   presentationTimeUs = 3955020
-sample:
-  trackIndex = 1
-  dataHashCode = -933078911
-  size = 5756
-  isKeyFrame = true
-  presentationTimeUs = 3970020
 sample:
   trackIndex = 1
   dataHashCode = -1807454463

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence-effects_then_silence.dump

@@ -1704,16 +1704,10 @@ sample:
   presentationTimeUs = 1942902
 sample:
   trackIndex = 1
-  dataHashCode = -1759454975
-  size = 440
+  dataHashCode = 359941761
+  size = 5644
   isKeyFrame = true
   presentationTimeUs = 1967845
-sample:
-  trackIndex = 1
-  dataHashCode = -1409159807
-  size = 5204
-  isKeyFrame = true
-  presentationTimeUs = 1970340
 sample:
   trackIndex = 1
   dataHashCode = 693101697

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_audio_with_effects.dump

@@ -1704,16 +1704,10 @@ sample:
   presentationTimeUs = 1942902
 sample:
   trackIndex = 1
-  dataHashCode = -1759454975
-  size = 440
+  dataHashCode = 359941761
+  size = 5644
   isKeyFrame = true
   presentationTimeUs = 1967845
-sample:
-  trackIndex = 1
-  dataHashCode = -1409159807
-  size = 5204
-  isKeyFrame = true
-  presentationTimeUs = 1970340
 sample:
   trackIndex = 1
   dataHashCode = -752508258

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_silence-effects.dump

@@ -1704,16 +1704,10 @@ sample:
   presentationTimeUs = 1942902
 sample:
   trackIndex = 1
-  dataHashCode = -1759454975
-  size = 440
+  dataHashCode = 359941761
+  size = 5644
   isKeyFrame = true
   presentationTimeUs = 1967845
-sample:
-  trackIndex = 1
-  dataHashCode = -1409159807
-  size = 5204
-  isKeyFrame = true
-  presentationTimeUs = 1970340
 sample:
   trackIndex = 1
   dataHashCode = 693101697

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_silence_with_effects.dump

@@ -1704,16 +1704,10 @@ sample:
   presentationTimeUs = 1942902
 sample:
   trackIndex = 1
-  dataHashCode = -1759454975
-  size = 440
+  dataHashCode = 359941761
+  size = 5644
   isKeyFrame = true
   presentationTimeUs = 1967845
-sample:
-  trackIndex = 1
-  dataHashCode = -1409159807
-  size = 5204
-  isKeyFrame = true
-  presentationTimeUs = 1970340
 sample:
   trackIndex = 1
   dataHashCode = 693101697