Add Open GL step to Transformer

PiperOrigin-RevId: 394708737

library/common/src/main/java/com/google/android/exoplayer2/util/GlUtil.java

@@ -223,6 +223,9 @@ public final class GlUtil {
     }
   }
 
+  /** Represents an unset texture ID. */
+  public static final int TEXTURE_ID_UNSET = -1;
+
   /** Whether to throw a {@link GlException} in case of an OpenGL error. */
   public static boolean glAssertionsEnabled = false;
 

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

@@ -343,8 +343,21 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    * be available until the previous has been released.
    */
   public void releaseOutputBuffer() {
+    releaseOutputBuffer(/* render= */ false);
+  }
+
+  /**
+   * Releases the current output buffer. If the {@link MediaCodec} was configured with an output
+   * surface, setting {@code render} to {@code true} will first send the buffer to the output
+   * surface. The surface will release the buffer back to the codec once it is no longer
+   * used/displayed.
+   *
+   * <p>This should be called after the buffer has been processed. The next output buffer will not
+   * be available until the previous has been released.
+   */
+  public void releaseOutputBuffer(boolean render) {
     outputBuffer = null;
-    codec.releaseOutputBuffer(outputBufferIndex, /* render= */ false);
+    codec.releaseOutputBuffer(outputBufferIndex, render);
     outputBufferIndex = C.INDEX_UNSET;
   }
 
@@ -359,18 +372,6 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     codec.release();
   }
 
-  /** Returns {@code true} if a buffer is successfully obtained, rendered and released. */
-  public boolean maybeDequeueRenderAndReleaseOutputBuffer() {
-    if (!maybeDequeueOutputBuffer()) {
-      return false;
-    }
-
-    codec.releaseOutputBuffer(outputBufferIndex, /* render= */ true);
-    outputBuffer = null;
-    outputBufferIndex = C.INDEX_UNSET;
-    return true;
-  }
-
   /**
    * Tries obtaining an output buffer and sets {@link #outputBuffer} to the obtained output buffer.
    *

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

@@ -20,6 +20,7 @@ import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.BaseRenderer;
 import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.RendererCapabilities;
 import com.google.android.exoplayer2.util.MediaClock;
@@ -75,7 +76,7 @@ import com.google.android.exoplayer2.util.MimeTypes;
   }
 
   @Override
-  protected final void onStarted() {
+  protected void onStarted() throws ExoPlaybackException {
     isRendererStarted = true;
   }