Add missing switch case

Before this change, calling read after reaching the end of input in an Ogg file
would cause an IllegalStateException.

PiperOrigin-RevId: 364758873

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ogg/StreamReader.java

@@ -119,6 +119,8 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       case STATE_READ_PAYLOAD:
         castNonNull(oggSeeker);
         return readPayload(input, seekPosition);
+      case STATE_END_OF_INPUT:
+        return C.RESULT_END_OF_INPUT;
       default:
         // Never happens.
         throw new IllegalStateException();

library/extractor/src/test/java/com/google/android/exoplayer2/extractor/ogg/OggExtractorNonParameterizedTest.java

@@ -16,11 +16,15 @@
 package com.google.android.exoplayer2.extractor.ogg;
 
 import static com.google.android.exoplayer2.testutil.TestUtil.getByteArray;
+import static com.google.common.truth.Truth.assertThat;
 
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.extractor.PositionHolder;
 import com.google.android.exoplayer2.testutil.ExtractorAsserts;
 import com.google.android.exoplayer2.testutil.FakeExtractorInput;
+import com.google.android.exoplayer2.testutil.FakeExtractorOutput;
 import java.io.IOException;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -35,6 +39,19 @@ import org.junit.runner.RunWith;
 public final class OggExtractorNonParameterizedTest {
 
   @Test
+  public void read_afterEndOfInput_doesNotThrowIllegalState() throws Exception {
+    byte[] data =
+        getByteArray(ApplicationProvider.getApplicationContext(), "media/ogg/bear_flac.ogg");
+    FakeExtractorInput input = new FakeExtractorInput.Builder().setData(data).build();
+    OggExtractor oggExtractor = new OggExtractor();
+    oggExtractor.init(new FakeExtractorOutput());
+    // We feed data to the extractor until the end of input is reached.
+    while (oggExtractor.read(input, new PositionHolder()) != C.RESULT_END_OF_INPUT) {}
+    // We call read again to check that it does not throw an IllegalStateException.
+    assertThat(oggExtractor.read(input, new PositionHolder())).isEqualTo(C.RESULT_END_OF_INPUT);
+  }
+
+  @Test
   public void sniffVorbis() throws Exception {
     byte[] data =
         getByteArray(ApplicationProvider.getApplicationContext(), "media/ogg/vorbis_header");