Various small improvements in Transformer

PiperOrigin-RevId: 414428415

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

@@ -98,12 +98,14 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   }
 
   @Override
-  public void release() {
-    sonicAudioProcessor.reset();
-    decoder.release();
-    if (encoder != null) {
-      encoder.release();
-    }
+  @Nullable
+  public DecoderInputBuffer dequeueInputBuffer() {
+    return decoder.maybeDequeueInputBuffer(decoderInputBuffer) ? decoderInputBuffer : null;
+  }
+
+  @Override
+  public void queueInputBuffer() {
+    decoder.queueInputBuffer(decoderInputBuffer);
   }
 
   @Override
@@ -120,27 +122,11 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
   @Override
   @Nullable
-  public DecoderInputBuffer dequeueInputBuffer() {
-    return decoder.maybeDequeueInputBuffer(decoderInputBuffer) ? decoderInputBuffer : null;
-  }
-
-  @Override
-  public void queueInputBuffer() {
-    decoder.queueInputBuffer(decoderInputBuffer);
-  }
-
-  @Override
-  @Nullable
   public Format getOutputFormat() {
     return encoder != null ? encoder.getOutputFormat() : null;
   }
 
   @Override
-  public boolean isEnded() {
-    return encoder != null && encoder.isEnded();
-  }
-
-  @Override
   @Nullable
   public DecoderInputBuffer getOutputBuffer() {
     if (encoder != null) {
@@ -159,6 +145,20 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     checkStateNotNull(encoder).releaseOutputBuffer();
   }
 
+  @Override
+  public boolean isEnded() {
+    return encoder != null && encoder.isEnded();
+  }
+
+  @Override
+  public void release() {
+    sonicAudioProcessor.reset();
+    decoder.release();
+    if (encoder != null) {
+      encoder.release();
+    }
+  }
+
   /**
    * Attempts to pass decoder output data to the encoder, and returns whether it may be possible to
    * pass more data immediately by calling this method again.

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

@@ -100,7 +100,7 @@ import java.io.IOException;
    * Returns a 4x4, column-major Matrix float array, from an input {@link Matrix}. This is useful
    * for converting to the 4x4 column-major format commonly used in OpenGL.
    */
-  private static final float[] getGlMatrixArray(Matrix matrix) {
+  private static float[] getGlMatrixArray(Matrix matrix) {
     float[] matrix3x3Array = new float[9];
     matrix.getValues(matrix3x3Array);
     float[] matrix4x4Array = getMatrix4x4Array(matrix3x3Array);
@@ -123,7 +123,7 @@ import java.io.IOException;
    * Input format: [a, b, c, d, e, f, g, h, i] <br>
    * Output format: [a, b, 0, c, d, e, 0, f, 0, 0, 1, 0, g, h, 0, i]
    */
-  private static final float[] getMatrix4x4Array(float[] matrix3x3Array) {
+  private static float[] getMatrix4x4Array(float[] matrix3x3Array) {
     float[] matrix4x4Array = new float[16];
     matrix4x4Array[10] = 1;
     for (int inputRow = 0; inputRow < 3; inputRow++) {

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

@@ -41,7 +41,7 @@ import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
   void queueInputBuffer();
 
   /**
-   * Process the input data and returns whether more data can be processed by calling this method
+   * Processes the input data and returns whether more data can be processed by calling this method
    * again.
    */
   boolean processData() throws ExoPlaybackException;

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

@@ -60,12 +60,7 @@ import com.google.android.exoplayer2.source.SampleStream.ReadDataResult;
       return false;
     }
     Format inputFormat = checkNotNull(formatHolder.format);
-    boolean shouldChangeMimeType =
-        transformation.audioMimeType != null
-            && !transformation.audioMimeType.equals(inputFormat.sampleMimeType);
-    boolean shouldFlattenForSlowMotion =
-        transformation.flattenForSlowMotion && isSlowMotion(inputFormat);
-    if (shouldChangeMimeType || shouldFlattenForSlowMotion) {
+    if (shouldTranscode(inputFormat)) {
       samplePipeline = new AudioSamplePipeline(inputFormat, transformation, getIndex());
     } else {
       samplePipeline = new PassthroughSamplePipeline(inputFormat);
@@ -73,6 +68,17 @@ import com.google.android.exoplayer2.source.SampleStream.ReadDataResult;
     return true;
   }
 
+  private boolean shouldTranscode(Format inputFormat) {
+    if (transformation.audioMimeType != null
+        && !transformation.audioMimeType.equals(inputFormat.sampleMimeType)) {
+      return true;
+    }
+    if (transformation.flattenForSlowMotion && isSlowMotion(inputFormat)) {
+      return true;
+    }
+    return false;
+  }
+
   private static boolean isSlowMotion(Format format) {
     @Nullable Metadata metadata = format.metadata;
     if (metadata == null) {

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

@@ -103,6 +103,17 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   }
 
   @Override
+  @Nullable
+  public DecoderInputBuffer dequeueInputBuffer() {
+    return decoder.maybeDequeueInputBuffer(decoderInputBuffer) ? decoderInputBuffer : null;
+  }
+
+  @Override
+  public void queueInputBuffer() {
+    decoder.queueInputBuffer(decoderInputBuffer);
+  }
+
+  @Override
   public boolean processData() {
     if (decoder.isEnded()) {
       return false;
@@ -133,27 +144,11 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
   @Override
   @Nullable
-  public DecoderInputBuffer dequeueInputBuffer() {
-    return decoder.maybeDequeueInputBuffer(decoderInputBuffer) ? decoderInputBuffer : null;
-  }
-
-  @Override
-  public void queueInputBuffer() {
-    decoder.queueInputBuffer(decoderInputBuffer);
-  }
-
-  @Override
-  @Nullable
   public Format getOutputFormat() {
     return encoder.getOutputFormat();
   }
 
   @Override
-  public boolean isEnded() {
-    return encoder.isEnded();
-  }
-
-  @Override
   @Nullable
   public DecoderInputBuffer getOutputBuffer() {
     encoderOutputBuffer.data = encoder.getOutputBuffer();
@@ -172,6 +167,11 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   }
 
   @Override
+  public boolean isEnded() {
+    return encoder.isEnded();
+  }
+
+  @Override
   public void release() {
     if (frameEditor != null) {
       frameEditor.release();