Instantiate an ImageRenderer

Instantiate an ImageRenderer and add it to the list returned by
DefaultRenderersFactory.buildRenderers.

Add Renderer.MessageType.MSG_SET_IMAGE_OUTPUT and
ExoPlayer.setImageOutput to enable setting a custom
ImageRenderer.imageOutput.

Add ImageRenderer.handleMessage to process messages sent to the
renderer.

PiperOrigin-RevId: 581962451

RELEASENOTES.md

@@ -14,6 +14,10 @@
         preparing and caching the period, selecting tracks and loading the data
         on the period. Apps are able to control the preload progress by
         implementing `PreloadMediaSource.PreloadControl`.
+    *   Add `ExoPlayer.setImageOutput` that allows apps to set
+        `ImageRenderer.ImageOutput`.
+    *   `DefaultRenderersFactory` now provides an `ImageRenderer` to the player
+        by default with null `ImageOutput` and `ImageDecoder.Factory.DEFAULT`.
 *   Transformer:
     *   Add support for flattening H.265/HEVC SEF slow motion videos.
 *   Track Selection:

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/DefaultRenderersFactory.java

@@ -30,6 +30,8 @@ import androidx.media3.exoplayer.audio.AudioRendererEventListener;
 import androidx.media3.exoplayer.audio.AudioSink;
 import androidx.media3.exoplayer.audio.DefaultAudioSink;
 import androidx.media3.exoplayer.audio.MediaCodecAudioRenderer;
+import androidx.media3.exoplayer.image.ImageDecoder;
+import androidx.media3.exoplayer.image.ImageRenderer;
 import androidx.media3.exoplayer.mediacodec.DefaultMediaCodecAdapterFactory;
 import androidx.media3.exoplayer.mediacodec.MediaCodecAdapter;
 import androidx.media3.exoplayer.mediacodec.MediaCodecSelector;
@@ -307,6 +309,7 @@ public class DefaultRenderersFactory implements RenderersFactory {
         extensionRendererMode,
         renderersList);
     buildCameraMotionRenderers(context, extensionRendererMode, renderersList);
+    buildImageRenderers(renderersList);
     buildMiscellaneousRenderers(context, eventHandler, extensionRendererMode, renderersList);
     return renderersList.toArray(new Renderer[0]);
   }
@@ -594,6 +597,18 @@ public class DefaultRenderersFactory implements RenderersFactory {
     out.add(new CameraMotionRenderer());
   }
 
+  /**
+   * Builds image renderers for use by the player.
+   *
+   * <p>The {@link ImageRenderer} is built with {@code ImageOutput} set to null and {@link
+   * ImageDecoder.Factory} set to {@code ImageDecoder.Factory.DEFAULT} by default.
+   *
+   * @param out An array to which the built renderers should be appended.
+   */
+  protected void buildImageRenderers(ArrayList<Renderer> out) {
+    out.add(new ImageRenderer(ImageDecoder.Factory.DEFAULT, /* imageOutput= */ null));
+  }
+
   /**
    * Builds any miscellaneous renderers used by the player.
    *

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayer.java

@@ -56,6 +56,7 @@ import androidx.media3.exoplayer.analytics.AnalyticsListener;
 import androidx.media3.exoplayer.analytics.DefaultAnalyticsCollector;
 import androidx.media3.exoplayer.audio.AudioSink;
 import androidx.media3.exoplayer.audio.MediaCodecAudioRenderer;
+import androidx.media3.exoplayer.image.ImageOutput;
 import androidx.media3.exoplayer.metadata.MetadataRenderer;
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
 import androidx.media3.exoplayer.source.MediaSource;
@@ -1821,4 +1822,12 @@ public interface ExoPlayer extends Player {
    */
   @UnstableApi
   boolean isTunnelingEnabled();
+
+  /**
+   * Sets the {@link ImageOutput} where rendered images will be forwarded.
+   *
+   * @param imageOutput The {@link ImageOutput}.
+   */
+  @UnstableApi
+  void setImageOutput(ImageOutput imageOutput);
 }

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayerImpl.java

@@ -17,6 +17,7 @@ package androidx.media3.exoplayer;
 
 import static androidx.media3.common.C.TRACK_TYPE_AUDIO;
 import static androidx.media3.common.C.TRACK_TYPE_CAMERA_MOTION;
+import static androidx.media3.common.C.TRACK_TYPE_IMAGE;
 import static androidx.media3.common.C.TRACK_TYPE_VIDEO;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkNotNull;
@@ -27,6 +28,7 @@ import static androidx.media3.exoplayer.Renderer.MSG_SET_AUDIO_SESSION_ID;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_AUX_EFFECT_INFO;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_CAMERA_MOTION_LISTENER;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_CHANGE_FRAME_RATE_STRATEGY;
+import static androidx.media3.exoplayer.Renderer.MSG_SET_IMAGE_OUTPUT;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_PREFERRED_AUDIO_DEVICE;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_SCALING_MODE;
 import static androidx.media3.exoplayer.Renderer.MSG_SET_SKIP_SILENCE_ENABLED;
@@ -98,6 +100,7 @@ import androidx.media3.exoplayer.analytics.MediaMetricsListener;
 import androidx.media3.exoplayer.analytics.PlayerId;
 import androidx.media3.exoplayer.audio.AudioRendererEventListener;
 import androidx.media3.exoplayer.audio.AudioSink;
+import androidx.media3.exoplayer.image.ImageOutput;
 import androidx.media3.exoplayer.metadata.MetadataOutput;
 import androidx.media3.exoplayer.source.MaskingMediaSource;
 import androidx.media3.exoplayer.source.MediaSource;
@@ -1833,6 +1836,12 @@ import java.util.concurrent.TimeoutException;
     return false;
   }
 
+  @Override
+  public void setImageOutput(ImageOutput imageOutput) {
+    verifyApplicationThread();
+    sendRendererMessage(TRACK_TYPE_IMAGE, MSG_SET_IMAGE_OUTPUT, imageOutput);
+  }
+
   @SuppressWarnings("deprecation") // Calling deprecated methods.
   /* package */ void setThrowsWhenUsingWrongThread(boolean throwsWhenUsingWrongThread) {
     this.throwsWhenUsingWrongThread = throwsWhenUsingWrongThread;

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/Renderer.java

@@ -33,6 +33,7 @@ import androidx.media3.common.util.Size;
 import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
 import androidx.media3.exoplayer.analytics.PlayerId;
+import androidx.media3.exoplayer.image.ImageOutput;
 import androidx.media3.exoplayer.source.MediaPeriod;
 import androidx.media3.exoplayer.source.MediaSource.MediaPeriodId;
 import androidx.media3.exoplayer.source.SampleStream;
@@ -94,9 +95,9 @@ public interface Renderer extends PlayerMessage.Target {
    * #MSG_SET_SCALING_MODE}, {@link #MSG_SET_CHANGE_FRAME_RATE_STRATEGY}, {@link
    * #MSG_SET_AUX_EFFECT_INFO}, {@link #MSG_SET_VIDEO_FRAME_METADATA_LISTENER}, {@link
    * #MSG_SET_CAMERA_MOTION_LISTENER}, {@link #MSG_SET_SKIP_SILENCE_ENABLED}, {@link
-   * #MSG_SET_AUDIO_SESSION_ID}, {@link #MSG_SET_WAKEUP_LISTENER}, {@link #MSG_SET_VIDEO_EFFECTS} or
+   * #MSG_SET_AUDIO_SESSION_ID}, {@link #MSG_SET_WAKEUP_LISTENER}, {@link #MSG_SET_VIDEO_EFFECTS},
-   * {@link #MSG_SET_VIDEO_OUTPUT_RESOLUTION}. May also be an app-defined value (see {@link
+   * {@link #MSG_SET_VIDEO_OUTPUT_RESOLUTION} or {@link #MSG_SET_IMAGE_OUTPUT}. May also be an
-   * #MSG_CUSTOM_BASE}).
+   * app-defined value (see {@link #MSG_CUSTOM_BASE}).
    */
   @Documented
   @Retention(RetentionPolicy.SOURCE)
@@ -116,7 +117,8 @@ public interface Renderer extends PlayerMessage.Target {
         MSG_SET_AUDIO_SESSION_ID,
         MSG_SET_WAKEUP_LISTENER,
         MSG_SET_VIDEO_EFFECTS,
-        MSG_SET_VIDEO_OUTPUT_RESOLUTION
+        MSG_SET_VIDEO_OUTPUT_RESOLUTION,
+        MSG_SET_IMAGE_OUTPUT
       })
   public @interface MessageType {}
 
@@ -244,6 +246,12 @@ public interface Renderer extends PlayerMessage.Target {
    */
   int MSG_SET_VIDEO_OUTPUT_RESOLUTION = 14;
 
+  /**
+   * The type of message that can be passed to an image renderer to set a desired image output. The
+   * message payload should be an {@link ImageOutput}.
+   */
+  int MSG_SET_IMAGE_OUTPUT = 15;
+
   /**
    * Applications or extensions may define custom {@code MSG_*} constants that can be passed to
    * renderers. These custom constants must be greater than or equal to this value.

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/SimpleExoPlayer.java

@@ -51,6 +51,7 @@ import androidx.media3.common.util.Size;
 import androidx.media3.common.util.UnstableApi;
 import androidx.media3.exoplayer.analytics.AnalyticsCollector;
 import androidx.media3.exoplayer.analytics.AnalyticsListener;
+import androidx.media3.exoplayer.image.ImageOutput;
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
 import androidx.media3.exoplayer.source.MediaSource;
 import androidx.media3.exoplayer.source.ShuffleOrder;
@@ -1326,6 +1327,12 @@ public class SimpleExoPlayer extends BasePlayer
     return player.isTunnelingEnabled();
   }
 
+  @Override
+  public void setImageOutput(ImageOutput imageOutput) {
+    blockUntilConstructorFinished();
+    player.setImageOutput(imageOutput);
+  }
+
   /* package */ void setThrowsWhenUsingWrongThread(boolean throwsWhenUsingWrongThread) {
     blockUntilConstructorFinished();
     player.setThrowsWhenUsingWrongThread(throwsWhenUsingWrongThread);

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/image/ImageOutput.java

@@ -23,6 +23,20 @@ import androidx.media3.common.util.UnstableApi;
 @UnstableApi
 public interface ImageOutput {
 
+  /** A no-op implementation of ImageOutput. */
+  ImageOutput NO_OP =
+      new ImageOutput() {
+        @Override
+        public void onImageAvailable(long presentationTimeUs, Bitmap bitmap) {
+          // Do nothing.
+        }
+
+        @Override
+        public void onDisabled() {
+          // Do nothing.
+        }
+      };
+
   /**
    * Called when an there is a new image available.
    *

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/image/ImageRenderer.java

@@ -84,7 +84,6 @@ public final class ImageRenderer extends BaseRenderer {
   private static final int REINITIALIZATION_STATE_WAIT_END_OF_STREAM = 3;
 
   private final ImageDecoder.Factory decoderFactory;
-  private final ImageOutput imageOutput;
   private final DecoderInputBuffer flagsOnlyBuffer;
   private final LongArrayQueue offsetQueue;
 
@@ -96,6 +95,7 @@ public final class ImageRenderer extends BaseRenderer {
   private @Nullable ImageDecoder decoder;
   private @Nullable DecoderInputBuffer inputBuffer;
   private @Nullable ImageOutputBuffer outputBuffer;
+  private ImageOutput imageOutput;
 
   /**
    * Creates an instance.
@@ -103,12 +103,12 @@ public final class ImageRenderer extends BaseRenderer {
    * @param decoderFactory A {@link ImageDecoder.Factory} that supplies a decoder depending on the
    *     format provided.
    * @param imageOutput The rendering component to send the {@link Bitmap} and rendering commands
-   *     to.
+   *     to, or {@code null} if no bitmap output is required.
    */
-  public ImageRenderer(ImageDecoder.Factory decoderFactory, ImageOutput imageOutput) {
+  public ImageRenderer(ImageDecoder.Factory decoderFactory, @Nullable ImageOutput imageOutput) {
     super(C.TRACK_TYPE_IMAGE);
     this.decoderFactory = decoderFactory;
-    this.imageOutput = imageOutput;
+    this.imageOutput = getImageOutput(imageOutput);
     flagsOnlyBuffer = DecoderInputBuffer.newNoDataInstance();
     offsetQueue = new LongArrayQueue();
     decoderReinitializationState = REINITIALIZATION_STATE_NONE;
@@ -223,6 +223,20 @@ public final class ImageRenderer extends BaseRenderer {
     releaseDecoderResources();
   }
 
+  @Override
+  public void handleMessage(@MessageType int messageType, @Nullable Object message)
+      throws ExoPlaybackException {
+    switch (messageType) {
+      case MSG_SET_IMAGE_OUTPUT:
+        @Nullable ImageOutput imageOutput =
+            message instanceof ImageOutput ? (ImageOutput) message : null;
+        setImageOutput(imageOutput);
+        break;
+      default:
+        super.handleMessage(messageType, message);
+    }
+  }
+
   /**
    * Attempts to dequeue an output buffer from the decoder and, if successful and permitted to,
    * renders it.
@@ -371,4 +385,12 @@ public final class ImageRenderer extends BaseRenderer {
       decoder = null;
     }
   }
+
+  private void setImageOutput(@Nullable ImageOutput imageOutput) {
+    this.imageOutput = getImageOutput(imageOutput);
+  }
+
+  private static ImageOutput getImageOutput(@Nullable ImageOutput imageOutput) {
+    return imageOutput == null ? ImageOutput.NO_OP : imageOutput;
+  }
 }

libraries/test_utils/src/main/java/androidx/media3/test/utils/StubExoPlayer.java

@@ -34,6 +34,7 @@ import androidx.media3.exoplayer.Renderer;
 import androidx.media3.exoplayer.SeekParameters;
 import androidx.media3.exoplayer.analytics.AnalyticsCollector;
 import androidx.media3.exoplayer.analytics.AnalyticsListener;
+import androidx.media3.exoplayer.image.ImageOutput;
 import androidx.media3.exoplayer.source.MediaSource;
 import androidx.media3.exoplayer.source.ShuffleOrder;
 import androidx.media3.exoplayer.source.TrackGroupArray;
@@ -406,4 +407,9 @@ public class StubExoPlayer extends StubPlayer implements ExoPlayer {
   public boolean isTunnelingEnabled() {
     throw new UnsupportedOperationException();
   }
+
+  @Override
+  public void setImageOutput(ImageOutput imageOutput) {
+    throw new UnsupportedOperationException();
+  }
 }