Use AudioFormat in SilentAudioGenerator.

PiperOrigin-RevId: 521790733

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

@@ -18,7 +18,7 @@ package com.google.android.exoplayer2.transformer;
 
 import static com.google.android.exoplayer2.decoder.DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DIRECT;
 import static com.google.android.exoplayer2.decoder.DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED;
-import static com.google.android.exoplayer2.transformer.DefaultCodec.DEFAULT_PCM_ENCODING;
+import static com.google.android.exoplayer2.util.Assertions.checkArgument;
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 import static com.google.android.exoplayer2.util.Assertions.checkState;
 import static java.lang.Math.min;
@@ -71,7 +71,6 @@ import org.checkerframework.dataflow.qual.Pure;
       throws ExportException {
     super(firstAssetLoaderInputFormat, muxerWrapper);
 
-    silentAudioGenerator = new SilentAudioGenerator(firstPipelineInputFormat);
     availableInputBuffers = new ConcurrentLinkedDeque<>();
     ByteBuffer emptyBuffer = ByteBuffer.allocateDirect(0).order(ByteOrder.nativeOrder());
     for (int i = 0; i < MAX_INPUT_BUFFER_COUNT; i++) {
@@ -84,6 +83,15 @@ import org.checkerframework.dataflow.qual.Pure;
     encoderInputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
     encoderOutputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
 
+    checkArgument(firstPipelineInputFormat.pcmEncoding != Format.NO_VALUE);
+    AudioFormat inputAudioFormat =
+        new AudioFormat(
+            firstPipelineInputFormat.sampleRate,
+            firstPipelineInputFormat.channelCount,
+            firstPipelineInputFormat.pcmEncoding);
+
+    silentAudioGenerator = new SilentAudioGenerator(inputAudioFormat);
+
     if (flattenForSlowMotion && firstAssetLoaderInputFormat.metadata != null) {
       audioProcessors =
           new ImmutableList.Builder<AudioProcessor>()
@@ -95,20 +103,12 @@ import org.checkerframework.dataflow.qual.Pure;
     }
 
     audioProcessingPipeline = new AudioProcessingPipeline(audioProcessors);
-    // TODO(b/267301878): Once decoder format propagated, remove setting default PCM encoding.
-    AudioFormat pipelineInputAudioFormat =
-        new AudioFormat(
-            firstPipelineInputFormat.sampleRate,
-            firstPipelineInputFormat.channelCount,
-            firstPipelineInputFormat.pcmEncoding != Format.NO_VALUE
-                ? firstPipelineInputFormat.pcmEncoding
-                : DEFAULT_PCM_ENCODING);
 
     try {
-      encoderInputAudioFormat = audioProcessingPipeline.configure(pipelineInputAudioFormat);
+      encoderInputAudioFormat = audioProcessingPipeline.configure(inputAudioFormat);
     } catch (AudioProcessor.UnhandledAudioFormatException unhandledAudioFormatException) {
       throw ExportException.createForAudioProcessing(
-          unhandledAudioFormatException, pipelineInputAudioFormat);
+          unhandledAudioFormatException, inputAudioFormat);
     }
 
     audioProcessingPipeline.flush();

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

@@ -17,7 +17,7 @@
 package com.google.android.exoplayer2.transformer;
 
 import com.google.android.exoplayer2.C;
-import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat;
 import com.google.android.exoplayer2.util.Util;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -31,12 +31,9 @@ import java.util.concurrent.atomic.AtomicLong;
   private final ByteBuffer internalBuffer;
   private final AtomicLong remainingBytesToOutput;
 
-  public SilentAudioGenerator(Format format) {
+  public SilentAudioGenerator(AudioFormat format) {
     sampleRate = format.sampleRate;
-    frameSize =
-        Util.getPcmFrameSize(
-            format.pcmEncoding == Format.NO_VALUE ? C.ENCODING_PCM_16BIT : format.pcmEncoding,
-            format.channelCount);
+    frameSize = Util.getPcmFrameSize(format.encoding, format.channelCount);
     internalBuffer =
         ByteBuffer.allocateDirect(DEFAULT_BUFFER_SIZE_FRAMES * frameSize)
             .order(ByteOrder.nativeOrder());

library/transformer/src/test/java/com/google/android/exoplayer2/transformer/SilentAudioGeneratorTest.java

@@ -19,7 +19,7 @@ import static com.google.common.truth.Truth.assertThat;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.C;
-import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat;
 import java.nio.ByteBuffer;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -32,11 +32,7 @@ public class SilentAudioGeneratorTest {
   public void addSilenceOnce_numberOfBytesProduced_isCorrect() {
     SilentAudioGenerator generator =
         new SilentAudioGenerator(
-            new Format.Builder()
-                .setSampleRate(88_200)
-                .setPcmEncoding(C.ENCODING_PCM_16BIT)
-                .setChannelCount(6)
-                .build());
+            new AudioFormat(/* sampleRate= */ 88_200, /* channelCount= */ 6, C.ENCODING_PCM_16BIT));
 
     generator.addSilence(/* durationUs= */ 3_000_000);
     int bytesOutput = drainGenerator(generator);
@@ -49,11 +45,7 @@ public class SilentAudioGeneratorTest {
   public void addSilenceTwice_numberOfBytesProduced_isCorrect() {
     SilentAudioGenerator generator =
         new SilentAudioGenerator(
-            new Format.Builder()
-                .setSampleRate(88_200)
-                .setPcmEncoding(C.ENCODING_PCM_16BIT)
-                .setChannelCount(6)
-                .build());
+            new AudioFormat(/* sampleRate= */ 88_200, /* channelCount= */ 6, C.ENCODING_PCM_16BIT));
 
     generator.addSilence(/* durationUs= */ 3_000_000);
     int bytesOutput = drainGenerator(generator);
@@ -68,11 +60,8 @@ public class SilentAudioGeneratorTest {
   public void lastBufferProduced_isCorrectSize() {
     SilentAudioGenerator generator =
         new SilentAudioGenerator(
-            new Format.Builder()
-                .setSampleRate(44_100)
-                .setPcmEncoding(C.ENCODING_PCM_16BIT)
-                .setChannelCount(2)
-                .build());
+            new AudioFormat(/* sampleRate= */ 44_100, /* channelCount= */ 2, C.ENCODING_PCM_16BIT));
+
     generator.addSilence(/* durationUs= */ 1_000_000);
 
     int currentBufferSize = 0;
@@ -92,11 +81,7 @@ public class SilentAudioGeneratorTest {
   public void totalBytesLowerThanDefaultBufferSize_smallBufferProduced() {
     SilentAudioGenerator generator =
         new SilentAudioGenerator(
-            new Format.Builder()
-                .setSampleRate(48_000)
-                .setPcmEncoding(C.ENCODING_PCM_16BIT)
-                .setChannelCount(2)
-                .build());
+            new AudioFormat(/* sampleRate= */ 48_000, /* channelCount= */ 2, C.ENCODING_PCM_16BIT));
 
     generator.addSilence(/* durationUs= */ 5_000);
 

library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TestUtil.java

@@ -115,7 +115,9 @@ public final class TestUtil {
               .setChannelCount(2)
               .build();
       try {
-        listener.onTrackAdded(format, supportedOutputTypes);
+        if (listener.onTrackAdded(format, supportedOutputTypes)) {
+          format = format.buildUpon().setPcmEncoding(C.ENCODING_PCM_16BIT).build();
+        }
 
         SampleConsumer sampleConsumer = listener.onOutputFormat(format);
         if (sampleConsumerRef != null) {