Update getFormatFromExtension to take a URI

This allows to handle the last segment retrieval and process the case
where the filename is null in the method.

PiperOrigin-RevId: 314512974

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

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.util;
 
+import android.net.Uri;
 import androidx.annotation.IntDef;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
@@ -112,11 +113,15 @@ public final class FilenameUtil {
   private FilenameUtil() {}
 
   /**
-   * Returns the {@link FileFormat} corresponding to the extension of the provided {@code filename}.
+   * Returns the {@link FileFormat} corresponding to the filename extension of the provided {@link
+   * Uri}. The filename is considered to be the last segment of the {@link Uri} path.
    */
   @FileFormat
-  public static int getFormatFromExtension(String filename) {
+  public static int getFormatFromExtension(Uri uri) {
-    if (filename.endsWith(FILE_EXTENSION_AC3) || filename.endsWith(FILE_EXTENSION_EC3)) {
+    String filename = uri.getLastPathSegment();
+    if (filename == null) {
+      return FILE_FORMAT_UNKNOWN;
+    } else if (filename.endsWith(FILE_EXTENSION_AC3) || filename.endsWith(FILE_EXTENSION_EC3)) {
       return FILE_FORMAT_AC3;
     } else if (filename.endsWith(FILE_EXTENSION_AC4)) {
       return FILE_FORMAT_AC4;

library/common/src/test/java/com/google/android/exoplayer2/util/FilenameUtilTest.java

@@ -21,6 +21,7 @@ import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_UNKNOW
 import static com.google.android.exoplayer2.util.FilenameUtil.getFormatFromExtension;
 import static com.google.common.truth.Truth.assertThat;
 
+import android.net.Uri;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -31,16 +32,30 @@ public class FilenameUtilTest {
 
   @Test
   public void getFormatFromExtension_withExtension_returnsExpectedFormat() {
-    assertThat(getFormatFromExtension("filename.mp3")).isEqualTo(FILE_FORMAT_MP3);
+    assertThat(getFormatFromExtension(Uri.parse("filename.mp3"))).isEqualTo(FILE_FORMAT_MP3);
   }
 
   @Test
   public void getFormatFromExtension_withExtensionPrefix_returnsExpectedFormat() {
-    assertThat(getFormatFromExtension("filename.mka")).isEqualTo(FILE_FORMAT_MATROSKA);
+    assertThat(getFormatFromExtension(Uri.parse("filename.mka"))).isEqualTo(FILE_FORMAT_MATROSKA);
   }
 
   @Test
-  public void getFormatFromExtension_unknownExtension_returnsUnknownFormat() {
+  public void getFormatFromExtension_withUnknownExtension_returnsUnknownFormat() {
-    assertThat(getFormatFromExtension("filename.unknown")).isEqualTo(FILE_FORMAT_UNKNOWN);
+    assertThat(getFormatFromExtension(Uri.parse("filename.unknown")))
+        .isEqualTo(FILE_FORMAT_UNKNOWN);
+  }
+
+  @Test
+  public void getFormatFromExtension_withUriNotEndingWithFilename_returnsExpectedFormat() {
+    assertThat(
+            getFormatFromExtension(
+                Uri.parse("http://www.example.com/filename.mp3?query=myquery#fragment")))
+        .isEqualTo(FILE_FORMAT_MP3);
+  }
+
+  @Test
+  public void getFormatFromExtension_withNullFilename_returnsUnknownFormat() {
+    assertThat(getFormatFromExtension(Uri.EMPTY)).isEqualTo(FILE_FORMAT_UNKNOWN);
   }
 }

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/DefaultExtractorsFactory.java

@@ -27,7 +27,6 @@ import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_MP4;
 import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_OGG;
 import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_PS;
 import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_TS;
-import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_UNKNOWN;
 import static com.google.android.exoplayer2.util.FilenameUtil.FILE_FORMAT_WAV;
 import static com.google.android.exoplayer2.util.FilenameUtil.getFormatFromExtension;
 
@@ -286,9 +285,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   public synchronized Extractor[] createExtractors(Uri uri) {
     List<Extractor> extractors = new ArrayList<>(/* initialCapacity= */ 14);
 
-    String filename = uri.getLastPathSegment();
+    @FilenameUtil.FileFormat int extensionFormat = getFormatFromExtension(uri);
-    @FilenameUtil.FileFormat
-    int extensionFormat = filename == null ? FILE_FORMAT_UNKNOWN : getFormatFromExtension(filename);
     addExtractorsForFormat(extensionFormat, extractors);
 
     for (int format : DEFAULT_EXTRACTOR_ORDER) {

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/DefaultHlsExtractorFactory.java

@@ -195,11 +195,7 @@ public final class DefaultHlsExtractorFactory implements HlsExtractorFactory {
     if (MimeTypes.TEXT_VTT.equals(format.sampleMimeType)) {
       return new WebvttExtractor(format.language, timestampAdjuster);
     }
-    String filename = uri.getLastPathSegment();
+    @FilenameUtil.FileFormat int fileFormat = getFormatFromExtension(uri);
-    if (filename == null) {
-      return null;
-    }
-    @FilenameUtil.FileFormat int fileFormat = getFormatFromExtension(filename);
     switch (fileFormat) {
       case FILE_FORMAT_WEBVTT:
         return new WebvttExtractor(format.language, timestampAdjuster);