Move sample processing to transformer thread

PiperOrigin-RevId: 491623586

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

@@ -39,7 +39,6 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
   @Nullable private DecoderInputBuffer inputBuffer;
   private boolean muxerWrapperTrackAdded;
-  private boolean isEnded;
 
   public BaseSamplePipeline(
       Format inputFormat,
@@ -81,11 +80,6 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     return feedMuxer() || processDataUpToMuxer();
   }
 
-  @Override
-  public boolean isEnded() {
-    return isEnded;
-  }
-
   @Nullable
   protected abstract DecoderInputBuffer dequeueInputBufferInternal() throws TransformationException;
 
@@ -148,7 +142,6 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
     if (isMuxerInputEnded()) {
       muxerWrapper.endTrack(trackType);
-      isEnded = true;
       return false;
     }
 

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

@@ -20,7 +20,6 @@ import static com.google.android.exoplayer2.DefaultLoadControl.DEFAULT_BUFFER_FO
 import static com.google.android.exoplayer2.DefaultLoadControl.DEFAULT_BUFFER_FOR_PLAYBACK_MS;
 import static com.google.android.exoplayer2.DefaultLoadControl.DEFAULT_MAX_BUFFER_MS;
 import static com.google.android.exoplayer2.DefaultLoadControl.DEFAULT_MIN_BUFFER_MS;
-import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 
 import android.content.Context;
 import android.os.Handler;
@@ -55,11 +54,10 @@ import com.google.android.exoplayer2.video.VideoRendererEventListener;
 
     void onAllTracksRegistered();
 
-    SamplePipeline onTrackAdded(Format format, long streamStartPositionUs, long streamOffsetUs)
+    SamplePipeline.Input onTrackAdded(
+        Format format, long streamStartPositionUs, long streamOffsetUs)
         throws TransformationException;
 
-    void onEnded();
-
     void onError(Exception e);
   }
 
@@ -111,6 +109,7 @@ import com.google.android.exoplayer2.video.VideoRendererEventListener;
   public void start() {
     player.setMediaItem(mediaItem);
     player.prepare();
+    player.play();
   }
 
   public void release() {
@@ -168,13 +167,6 @@ import com.google.android.exoplayer2.video.VideoRendererEventListener;
     }
 
     @Override
-    public void onPlaybackStateChanged(int state) {
-      if (state == Player.STATE_ENDED) {
-        listener.onEnded();
-      }
-    }
-
-    @Override
     public void onTimelineChanged(Timeline timeline, int reason) {
       if (hasSentDuration) {
         return;
@@ -184,7 +176,6 @@ import com.google.android.exoplayer2.video.VideoRendererEventListener;
       if (!window.isPlaceholder) {
         listener.onDurationMs(Util.usToMs(window.durationUs));
         hasSentDuration = true;
-        checkNotNull(player).play();
       }
     }
 

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

@@ -45,7 +45,8 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private boolean isTransformationRunning;
   private long streamStartPositionUs;
   private long streamOffsetUs;
-  private @MonotonicNonNull SamplePipeline samplePipeline;
+  private SamplePipeline.@MonotonicNonNull Input samplePipelineInput;
+  private boolean isEnded;
 
   public ExoPlayerAssetLoaderRenderer(
       int trackType,
@@ -88,7 +89,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
   @Override
   public boolean isEnded() {
-    return samplePipeline != null && samplePipeline.isEnded();
+    return isEnded;
   }
 
   @Override
@@ -98,7 +99,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
         return;
       }
 
-      while (samplePipeline.processData() || feedPipelineFromInput()) {}
+      while (feedPipelineFromInput()) {}
     } catch (TransformationException e) {
       isTransformationRunning = false;
       assetLoaderListener.onError(e);
@@ -127,16 +128,9 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     isTransformationRunning = false;
   }
 
-  @Override
-  protected void onReset() {
-    if (samplePipeline != null) {
-      samplePipeline.release();
-    }
-  }
-
-  @EnsuresNonNullIf(expression = "samplePipeline", result = true)
+  @EnsuresNonNullIf(expression = "samplePipelineInput", result = true)
   private boolean ensureConfigured() throws TransformationException {
-    if (samplePipeline != null) {
+    if (samplePipelineInput != null) {
       return true;
     }
 
@@ -147,7 +141,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       return false;
     }
     Format inputFormat = checkNotNull(formatHolder.format);
-    samplePipeline =
+    samplePipelineInput =
         assetLoaderListener.onTrackAdded(inputFormat, streamStartPositionUs, streamOffsetUs);
     return true;
   }
@@ -156,11 +150,11 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
    * Attempts to read input data and pass the input data to the sample pipeline.
    *
    * @return Whether it may be possible to read more data immediately by calling this method again.
-   * @throws TransformationException If a {@link SamplePipeline} problem occurs.
    */
-  @RequiresNonNull("samplePipeline")
-  private boolean feedPipelineFromInput() throws TransformationException {
-    @Nullable DecoderInputBuffer samplePipelineInputBuffer = samplePipeline.dequeueInputBuffer();
+  @RequiresNonNull("samplePipelineInput")
+  private boolean feedPipelineFromInput() {
+    @Nullable
+    DecoderInputBuffer samplePipelineInputBuffer = samplePipelineInput.dequeueInputBuffer();
     if (samplePipelineInputBuffer == null) {
       return false;
     }
@@ -171,11 +165,12 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       case C.RESULT_BUFFER_READ:
         samplePipelineInputBuffer.flip();
         if (samplePipelineInputBuffer.isEndOfStream()) {
-          samplePipeline.queueInputBuffer();
+          samplePipelineInput.queueInputBuffer();
+          isEnded = true;
           return false;
         }
         mediaClock.updateTimeForTrackType(getTrackType(), samplePipelineInputBuffer.timeUs);
-        samplePipeline.queueInputBuffer();
+        samplePipelineInput.queueInputBuffer();
         return true;
       case C.RESULT_FORMAT_READ:
         throw new IllegalStateException("Format changes are not supported.");

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

@@ -69,6 +69,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private int trackCount;
   private int trackFormatCount;
   private boolean isReady;
+  private boolean isEnded;
   private @C.TrackType int previousTrackType;
   private long minTrackTimeUs;
   private @MonotonicNonNull ScheduledFuture<?> abortScheduledFuture;
@@ -216,9 +217,15 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     trackTypeToIndex.delete(trackType);
     if (trackTypeToIndex.size() == 0) {
       abortScheduledExecutorService.shutdownNow();
+      isEnded = true;
     }
   }
 
+  /** Returns whether all the tracks are {@linkplain #endTrack(int) ended}. */
+  public boolean isEnded() {
+    return isEnded;
+  }
+
   /**
    * Finishes writing the output and releases any resources associated with muxing.
    *

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

@@ -26,6 +26,17 @@ import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
  */
 /* package */ interface SamplePipeline {
 
+  /** Input of a {@link SamplePipeline}. */
+  interface Input {
+
+    /** See {@link SamplePipeline#dequeueInputBuffer()}. */
+    @Nullable
+    DecoderInputBuffer dequeueInputBuffer();
+
+    /** See {@link SamplePipeline#queueInputBuffer()}. */
+    void queueInputBuffer();
+  }
+
   /** A listener for the sample pipeline events. */
   interface Listener {
 
@@ -63,9 +74,6 @@ import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
    */
   boolean processData() throws TransformationException;
 
-  /** Returns whether the pipeline has ended. */
-  boolean isEnded();
-
   /** Releases all resources held by the pipeline. */
   void release();
 }