Fix HLS playlist parsing of boolean attributes.

The regex included quotation marks like X="YES", but the manifests
don't actually contain them, for examples X=YES.

library/src/main/java/com/google/android/exoplayer/hls/HlsParserUtil.java

@@ -23,9 +23,10 @@ import java.util.regex.Pattern;
 /**
 /**
  * Utility methods for HLS manifest parsing.
  * Utility methods for HLS manifest parsing.
  */
  */
-/* package */ class HlsParserUtil {
+/* package */ final class HlsParserUtil {
 
 
   private static final String BOOLEAN_YES = "YES";
   private static final String BOOLEAN_YES = "YES";
+  private static final String BOOLEAN_NO = "NO";
 
 
   private HlsParserUtil() {}
   private HlsParserUtil() {}
 
 
@@ -56,7 +57,7 @@ import java.util.regex.Pattern;
     return null;
     return null;
   }
   }
 
 
-  public static boolean parseOptionalBoolAttr(String line, Pattern pattern) {
+  public static boolean parseOptionalBooleanAttr(String line, Pattern pattern) {
     Matcher matcher = pattern.matcher(line);
     Matcher matcher = pattern.matcher(line);
     if (matcher.find() && matcher.groupCount() == 1) {
     if (matcher.find() && matcher.groupCount() == 1) {
       return BOOLEAN_YES.equals(matcher.group(1));
       return BOOLEAN_YES.equals(matcher.group(1));
@@ -64,4 +65,8 @@ import java.util.regex.Pattern;
     return false;
     return false;
   }
   }
 
 
+  public static Pattern compileBooleanAttrPattern(String attrName) {
+    return Pattern.compile(attrName + "=(" + BOOLEAN_YES + "|" + BOOLEAN_NO + ")");
+  }
+
 }
 }

library/src/main/java/com/google/android/exoplayer/hls/HlsPlaylistParser.java

@@ -98,9 +98,9 @@ public final class HlsPlaylistParser implements NetworkLoadable.Parser<HlsPlayli
   private static final Pattern NAME_ATTR_REGEX =
   private static final Pattern NAME_ATTR_REGEX =
       Pattern.compile(NAME_ATTR + "=\"(.+?)\"");
       Pattern.compile(NAME_ATTR + "=\"(.+?)\"");
   private static final Pattern AUTOSELECT_ATTR_REGEX =
   private static final Pattern AUTOSELECT_ATTR_REGEX =
-      Pattern.compile(AUTOSELECT_ATTR + "=\"(.+?)\"");
+      HlsParserUtil.compileBooleanAttrPattern(AUTOSELECT_ATTR);
   private static final Pattern DEFAULT_ATTR_REGEX =
   private static final Pattern DEFAULT_ATTR_REGEX =
-      Pattern.compile(DEFAULT_ATTR + "=\"(.+?)\"");
+      HlsParserUtil.compileBooleanAttrPattern(DEFAULT_ATTR);
 
 
   @Override
   @Override
   public HlsPlaylist parse(String connectionUrl, InputStream inputStream)
   public HlsPlaylist parse(String connectionUrl, InputStream inputStream)
@@ -156,8 +156,8 @@ public final class HlsPlaylistParser implements NetworkLoadable.Parser<HlsPlayli
           String name = HlsParserUtil.parseStringAttr(line, NAME_ATTR_REGEX, NAME_ATTR);
           String name = HlsParserUtil.parseStringAttr(line, NAME_ATTR_REGEX, NAME_ATTR);
           String uri = HlsParserUtil.parseStringAttr(line, URI_ATTR_REGEX, URI_ATTR);
           String uri = HlsParserUtil.parseStringAttr(line, URI_ATTR_REGEX, URI_ATTR);
           String language = HlsParserUtil.parseOptionalStringAttr(line, LANGUAGE_ATTR_REGEX);
           String language = HlsParserUtil.parseOptionalStringAttr(line, LANGUAGE_ATTR_REGEX);
-          boolean isDefault = HlsParserUtil.parseOptionalBoolAttr(line, DEFAULT_ATTR_REGEX);
-          boolean autoSelect = HlsParserUtil.parseOptionalBoolAttr(line, AUTOSELECT_ATTR_REGEX);
+          boolean isDefault = HlsParserUtil.parseOptionalBooleanAttr(line, DEFAULT_ATTR_REGEX);
+          boolean autoSelect = HlsParserUtil.parseOptionalBooleanAttr(line, AUTOSELECT_ATTR_REGEX);
           subtitles.add(new Subtitle(name, uri, language, isDefault, autoSelect));
           subtitles.add(new Subtitle(name, uri, language, isDefault, autoSelect));
         } else {
         } else {
           // TODO: Support other types of media tag.
           // TODO: Support other types of media tag.