Add support for extracting Vorbis audio in WebM Extractor.

library/src/main/java/com/google/android/exoplayer/dash/DashChunkSource.java

@@ -87,7 +87,7 @@ public class DashChunkSource implements ChunkSource {
       formats[i] = representations[i].format;
       maxWidth = Math.max(formats[i].width, maxWidth);
       maxHeight = Math.max(formats[i].height, maxHeight);
-      Extractor extractor = formats[i].mimeType.startsWith(MimeTypes.VIDEO_WEBM)
+      Extractor extractor = mimeTypeIsWebm(formats[i].mimeType)
           ? new WebmExtractor() : new FragmentedMp4Extractor();
       extractors.put(formats[i].id, extractor);
       this.representations.put(formats[i].id, representations[i]);
@@ -197,6 +197,10 @@ public class DashChunkSource implements ChunkSource {
     // Do nothing.
   }
 
+  private boolean mimeTypeIsWebm(String mimeType) {
+    return mimeType.startsWith(MimeTypes.VIDEO_WEBM) || mimeType.startsWith(MimeTypes.AUDIO_WEBM);
+  }
+
   private Chunk newInitializationChunk(RangedUri initializationUri, RangedUri indexUri,
       Representation representation, Extractor extractor, DataSource dataSource,
       int trigger) {

library/src/main/java/com/google/android/exoplayer/parser/webm/DefaultEbmlReader.java

@@ -16,6 +16,7 @@
 package com.google.android.exoplayer.parser.webm;
 
 import com.google.android.exoplayer.C;
+import com.google.android.exoplayer.ParserException;
 import com.google.android.exoplayer.upstream.NonBlockingInputStream;
 import com.google.android.exoplayer.util.Assertions;
 
@@ -134,7 +135,7 @@ import java.util.Stack;
   }
 
   @Override
-  public int read(NonBlockingInputStream inputStream) {
+  public int read(NonBlockingInputStream inputStream) throws ParserException {
     Assertions.checkState(eventHandler != null);
     while (true) {
       while (!masterElementsStack.isEmpty()

library/src/main/java/com/google/android/exoplayer/parser/webm/EbmlEventHandler.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer.parser.webm;
 
+import com.google.android.exoplayer.ParserException;
 import com.google.android.exoplayer.upstream.NonBlockingInputStream;
 
 import java.nio.ByteBuffer;
@@ -46,41 +47,47 @@ import java.nio.ByteBuffer;
    * @param elementOffsetBytes The byte offset where this element starts
    * @param headerSizeBytes The byte length of this element's ID and size header
    * @param contentsSizeBytes The byte length of this element's children
+   * @throws ParserException If a parsing error occurs.
    */
   public void onMasterElementStart(
-      int id, long elementOffsetBytes, int headerSizeBytes, long contentsSizeBytes);
+      int id, long elementOffsetBytes, int headerSizeBytes,
+      long contentsSizeBytes) throws ParserException;
 
   /**
    * Called when a master element has finished reading in all of its children from the
    * {@link NonBlockingInputStream}.
    *
    * @param id The integer ID of this element
+   * @throws ParserException If a parsing error occurs.
    */
-  public void onMasterElementEnd(int id);
+  public void onMasterElementEnd(int id) throws ParserException;
 
   /**
    * Called when an integer element is encountered in the {@link NonBlockingInputStream}.
    *
    * @param id The integer ID of this element
    * @param value The integer value this element contains
+   * @throws ParserException If a parsing error occurs.
    */
-  public void onIntegerElement(int id, long value);
+  public void onIntegerElement(int id, long value) throws ParserException;
 
   /**
    * Called when a float element is encountered in the {@link NonBlockingInputStream}.
    *
    * @param id The integer ID of this element
    * @param value The float value this element contains
+   * @throws ParserException If a parsing error occurs.
    */
-  public void onFloatElement(int id, double value);
+  public void onFloatElement(int id, double value) throws ParserException;
 
   /**
    * Called when a string element is encountered in the {@link NonBlockingInputStream}.
    *
    * @param id The integer ID of this element
    * @param value The string value this element contains
+   * @throws ParserException If a parsing error occurs.
    */
-  public void onStringElement(int id, String value);
+  public void onStringElement(int id, String value) throws ParserException;
 
   /**
    * Called when a binary element is encountered in the {@link NonBlockingInputStream}.
@@ -109,9 +116,10 @@ import java.nio.ByteBuffer;
    * @param inputStream The {@link NonBlockingInputStream} from which this
    *        element's contents should be read
    * @return True if the element was read. False otherwise.
+   * @throws ParserException If a parsing error occurs.
    */
   public boolean onBinaryElement(
       int id, long elementOffsetBytes, int headerSizeBytes, int contentsSizeBytes,
-      NonBlockingInputStream inputStream);
+      NonBlockingInputStream inputStream) throws ParserException;
 
 }

library/src/main/java/com/google/android/exoplayer/parser/webm/EbmlReader.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer.parser.webm;
 
+import com.google.android.exoplayer.ParserException;
 import com.google.android.exoplayer.upstream.NonBlockingInputStream;
 
 import java.nio.ByteBuffer;
@@ -53,8 +54,9 @@ import java.nio.ByteBuffer;
    *
    * @param inputStream The input stream from which data should be read
    * @return One of the {@code RESULT_*} flags defined in this interface
+   * @throws ParserException If parsing fails.
    */
-  public int read(NonBlockingInputStream inputStream);
+  public int read(NonBlockingInputStream inputStream) throws ParserException;
 
   /**
    * The total number of bytes consumed by the reader since first created or last {@link #reset()}.

library/src/main/java/com/google/android/exoplayer/util/MimeTypes.java

@@ -34,6 +34,8 @@ public class MimeTypes {
   public static final String AUDIO_AAC = BASE_TYPE_AUDIO + "/mp4a-latm";
   public static final String AUDIO_AC3 = BASE_TYPE_AUDIO + "/ac3";
   public static final String AUDIO_EC3 = BASE_TYPE_AUDIO + "/eac3";
+  public static final String AUDIO_WEBM = BASE_TYPE_AUDIO + "/webm";
+  public static final String AUDIO_VORBIS = BASE_TYPE_AUDIO + "/vorbis";
 
   public static final String TEXT_VTT = BASE_TYPE_TEXT + "/vtt";