CompositionVideoSinkProvider: apply rotation effects per video

There is a bug in CompositionVideoSinkProvider where the rotation
effect is applied only on the first video and the same effect
is applied on subsequent videos without checking if the next
items in the playlist must be rotated.

The bug applies only on devices with API < 21.

PiperOrigin-RevId: 589823797

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/CompositingVideoSinkProvider.java

@@ -283,8 +283,7 @@ public void initialize(Format sourceFormat) throws VideoSink.VideoSinkException
               /* compositionEffects= */ ImmutableList.of(),
               /* initialTimestampOffsetUs= */ 0);
       videoSinkImpl =
-          new VideoSinkImpl(
-              context, /* compositingVideoSinkProvider= */ this, videoGraph, sourceFormat);
+          new VideoSinkImpl(context, /* compositingVideoSinkProvider= */ this, videoGraph);
     } catch (VideoFrameProcessingException e) {
       throw new VideoSink.VideoSinkException(e, sourceFormat);
     }
@@ -520,7 +519,7 @@ private static final class VideoSinkImpl implements VideoSink {
     private final VideoFrameProcessor videoFrameProcessor;
     private final int videoFrameProcessorMaxPendingFrameCount;
     private final ArrayList<Effect> videoEffects;
-    @Nullable private final Effect rotationEffect;
+    @Nullable private Effect rotationEffect;
 
     @Nullable private Format inputFormat;
     private long inputStreamOffsetUs;
@@ -541,8 +540,7 @@ private static final class VideoSinkImpl implements VideoSink {
     public VideoSinkImpl(
         Context context,
         CompositingVideoSinkProvider compositingVideoSinkProvider,
-        PreviewingVideoGraph videoGraph,
-        Format sourceFormat)
+        PreviewingVideoGraph videoGraph)
         throws VideoFrameProcessingException {
       this.context = context;
       this.compositingVideoSinkProvider = compositingVideoSinkProvider;
@@ -556,11 +554,6 @@ public VideoSinkImpl(
       videoFrameProcessor = videoGraph.getProcessor(videoGraphInputId);
 
       videoEffects = new ArrayList<>();
-      // MediaCodec applies rotation after API 21.
-      rotationEffect =
-          Util.SDK_INT < 21 && sourceFormat.rotationDegrees != 0
-              ? ScaleAndRotateAccessor.createRotationEffect(sourceFormat.rotationDegrees)
-              : null;
       finalBufferPresentationTimeUs = C.TIME_UNSET;
       lastBufferPresentationTimeUs = C.TIME_UNSET;
     }
@@ -596,6 +589,20 @@ public void registerInputStream(@InputType int inputType, Format format) {
       if (inputType != INPUT_TYPE_SURFACE) {
         throw new UnsupportedOperationException("Unsupported input type " + inputType);
       }
+      // MediaCodec applies rotation after API 21.
+      if (Util.SDK_INT < 21
+          && format.rotationDegrees != Format.NO_VALUE
+          && format.rotationDegrees != 0) {
+        // We must apply a rotation effect.
+        if (rotationEffect == null
+            || this.inputFormat == null
+            || this.inputFormat.rotationDegrees != format.rotationDegrees) {
+          rotationEffect = ScaleAndRotateAccessor.createRotationEffect(format.rotationDegrees);
+        } // Else, the rotation effect matches the previous format's rotation degrees, keep the same
+        // instance.
+      } else {
+        rotationEffect = null;
+      }
       this.inputFormat = format;
 
       if (!hasRegisteredFirstInputStream) {