keep maximum number of subtitles to four.

library/src/main/java/com/google/android/exoplayer/text/tx3g/SubtitleData.java

@@ -18,15 +18,18 @@ package com.google.android.exoplayer.text.tx3g;
 
 import java.util.Comparator;
 
+/**
+ * A representation of a single tx3g.
+ */
 class SubtitleData implements Comparable <SubtitleData>, Comparator<SubtitleData> {
 
   public final long startTimePosUs;
-  public final String strSubtitle;
+  public final String subtitle;
 
-  SubtitleData(long startTimePosUs, String strSubtitle)
+  SubtitleData(long startTimePosUs, String subtitle)
   {
     this.startTimePosUs = startTimePosUs;
-    this.strSubtitle = strSubtitle;
+    this.subtitle = subtitle;
   }
 
   @Override

library/src/main/java/com/google/android/exoplayer/text/tx3g/TextParser.java

@@ -19,8 +19,6 @@ import com.google.android.exoplayer.text.Subtitle;
 import com.google.android.exoplayer.text.SubtitleParser;
 import com.google.android.exoplayer.util.MimeTypes;
 
-import android.util.Log;
-
 import java.io.DataInputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -40,13 +38,12 @@ public class TextParser implements SubtitleParser {
   private static final String TAG = "TextParser";
 
   private final List<SubtitleData> subtitleList;
-
+  private static final int MAX_SUBTITLE_COUNT = 4;
   public TextParser() {
-    Log.i(TAG,"TextParser ");
+
     subtitleList = new LinkedList<SubtitleData>();
   }
 
-
   @Override
   public Subtitle parse(InputStream inputStream, String inputEncoding, long startTimeUs)
   throws IOException {
@@ -54,10 +51,13 @@ public class TextParser implements SubtitleParser {
     DataInputStream in  = new DataInputStream(inputStream);
     String text = in.readUTF();
     text = (text == null) ? "" : text;
-    Log.i(TAG,"parse(" + text + "," + startTimeUs + ")" );
 
     SubtitleData cue = new SubtitleData(startTimeUs, text);
 
+    while (subtitleList.size() > MAX_SUBTITLE_COUNT) {
+      subtitleList.remove(0);
+    }
+
     subtitleList.add(cue);
 
     Collections.sort(subtitleList, new Comparator<SubtitleData>() {
@@ -70,13 +70,11 @@ public class TextParser implements SubtitleParser {
         return 0;
       }
     });
-    TextSubtitle textSubtitle = new TextSubtitle(subtitleList);
-    return textSubtitle;
+    return new TextSubtitle(subtitleList);
   }
 
   @Override
   public boolean canParse(String mimeType) {
-    boolean rtn = MimeTypes.APPLICATION_TX3G.equals(mimeType);
-    return rtn;
+    return MimeTypes.APPLICATION_TX3G.equals(mimeType);
   }
 }

library/src/main/java/com/google/android/exoplayer/text/tx3g/TextSubtitle.java

@@ -34,7 +34,7 @@ public final class TextSubtitle implements Subtitle {
 
   @Override
   public long getStartTime() {
-    return text.get(0).getStartTimePos();
+    return text.get(0).startTimePosUs;
   }
 
   @Override
@@ -54,12 +54,12 @@ public final class TextSubtitle implements Subtitle {
   public long getEventTime(int index) {
     if (index > text.size() - 1) return -1;
 
-    return text.get(index).getStartTimePos();
+    return text.get(index).startTimePosUs;
   }
 
   @Override
   public long getLastEventTime() {
-    return text.get(0).getStartTimePos();
+    return text.get(0).startTimePosUs;
   }
 
   @Override
@@ -68,7 +68,7 @@ public final class TextSubtitle implements Subtitle {
     List<Cue> list = new ArrayList<>();
     if (index == -1) return null;
 
-    String str = text.get(index).getsubtitleText();
+    String str = text.get(index).subtitle;
 
     list.add(new Cue(str));
     return list;
@@ -80,10 +80,10 @@ public final class TextSubtitle implements Subtitle {
     int length = text.size();
     for (int i = 0; i < length ; i++) {
       SubtitleData data = text.get(i);
-      boolean bCheckFront = data.getStartTimePos() <= timeUs ;
+      boolean bCheckFront = data.startTimePosUs <= timeUs ;
       boolean bCheckEnd = false;
       if (i + 1  < length) {
-        bCheckEnd = text.get(i + 1).getStartTimePos() > timeUs ;
+        bCheckEnd = text.get(i + 1).startTimePosUs > timeUs ;
       } else if (i + 1 == length) {
         bCheckEnd = true;
       }