Pass Metadata to Muxer when adding a track.

PiperOrigin-RevId: 514575400

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AudioSamplePipeline.java

@@ -70,7 +70,7 @@ import org.checkerframework.dataflow.qual.Pure;
       MuxerWrapper muxerWrapper,
       MuxerWrapper muxerWrapper,
       FallbackListener fallbackListener)
       FallbackListener fallbackListener)
       throws ExportException {
       throws ExportException {
-    super(firstPipelineInputFormat, /* streamStartPositionUs= */ streamOffsetUs, muxerWrapper);
+    super(firstAssetLoaderInputFormat, /* streamStartPositionUs= */ streamOffsetUs, muxerWrapper);
 
 
     silentAudioGenerator = new SilentAudioGenerator(firstPipelineInputFormat);
     silentAudioGenerator = new SilentAudioGenerator(firstPipelineInputFormat);
     availableInputBuffers = new ConcurrentLinkedDeque<>();
     availableInputBuffers = new ConcurrentLinkedDeque<>();

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SamplePipeline.java

@@ -27,6 +27,7 @@ import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
+import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.video.ColorInfo;
 import com.google.android.exoplayer2.video.ColorInfo;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableList;
@@ -49,6 +50,7 @@ import java.util.List;
   private final long streamStartPositionUs;
   private final long streamStartPositionUs;
   private final MuxerWrapper muxerWrapper;
   private final MuxerWrapper muxerWrapper;
   private final @C.TrackType int outputTrackType;
   private final @C.TrackType int outputTrackType;
+  @Nullable private final Metadata metadata;
 
 
   private boolean muxerWrapperTrackAdded;
   private boolean muxerWrapperTrackAdded;
 
 
@@ -56,6 +58,7 @@ import java.util.List;
       Format firstInputFormat, long streamStartPositionUs, MuxerWrapper muxerWrapper) {
       Format firstInputFormat, long streamStartPositionUs, MuxerWrapper muxerWrapper) {
     this.streamStartPositionUs = streamStartPositionUs;
     this.streamStartPositionUs = streamStartPositionUs;
     this.muxerWrapper = muxerWrapper;
     this.muxerWrapper = muxerWrapper;
+    this.metadata = firstInputFormat.metadata;
     outputTrackType = getProcessedTrackType(firstInputFormat.sampleMimeType);
     outputTrackType = getProcessedTrackType(firstInputFormat.sampleMimeType);
   }
   }
 
 
@@ -94,6 +97,9 @@ import java.util.List;
       if (inputFormat == null) {
       if (inputFormat == null) {
         return false;
         return false;
       }
       }
+      if (metadata != null) {
+        inputFormat = inputFormat.buildUpon().setMetadata(metadata).build();
+      }
       try {
       try {
         muxerWrapper.addTrackFormat(inputFormat);
         muxerWrapper.addTrackFormat(inputFormat);
       } catch (Muxer.MuxerException e) {
       } catch (Muxer.MuxerException e) {

testdata/src/test/assets/transformerdumps/mp4/sample.mp4.48000hz.dump

@@ -14,6 +14,7 @@ format 1:
   channelCount = 1
   channelCount = 1
   sampleRate = 48000
   sampleRate = 48000
   pcmEncoding = 2
   pcmEncoding = 2
+  metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
 sample:
 sample:
   trackIndex = 1
   trackIndex = 1
   dataHashCode = 1868041800
   dataHashCode = 1868041800

testdata/src/test/assets/transformerdumps/mp4/sample.mp4.concatenated_with_high_pitch_and_no_video.dump

@@ -3,6 +3,7 @@ format 0:
   channelCount = 1
   channelCount = 1
   sampleRate = 44100
   sampleRate = 44100
   pcmEncoding = 2
   pcmEncoding = 2
+  metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
 sample:
 sample:
   trackIndex = 0
   trackIndex = 0
   dataHashCode = 915609509
   dataHashCode = 915609509

testdata/src/test/assets/transformerdumps/mp4/sample_sef_slow_motion.mp4.dump

@@ -15,6 +15,7 @@ format 1:
   channelCount = 2
   channelCount = 2
   sampleRate = 12000
   sampleRate = 12000
   pcmEncoding = 2
   pcmEncoding = 2
+  metadata = entries=[smta: captureFrameRate=240.0, svcTemporalLayerCount=4, SlowMotion: segments=[Segment: startTimeMs=88, endTimeMs=879, speedDivisor=2, Segment: startTimeMs=1255, endTimeMs=1970, speedDivisor=8]]
 sample:
 sample:
   trackIndex = 1
   trackIndex = 1
   dataHashCode = -212376212
   dataHashCode = -212376212