Further simplify SRT support

library/src/main/java/com/google/android/exoplayer/chunk/VideoFormatSelectorUtil.java

@@ -132,7 +132,7 @@ public final class VideoFormatSelectorUtil {
       }
     }
 
-    return Util.toArray(selectedIndexList);
+    return Util.toIntArray(selectedIndexList);
   }
 
   /**

library/src/main/java/com/google/android/exoplayer/text/subrip/SubripCue.java

@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer.text.subrip;
-
-import com.google.android.exoplayer.text.Cue;
-
-/**
- * A representation of a SubRip cue.
- */
-/* package */ final class SubripCue extends Cue {
-
-  public final long startTime;
-  public final long endTime;
-
-  public SubripCue(long startTime, long endTime, CharSequence text) {
-    super(text);
-    this.startTime = startTime;
-    this.endTime = endTime;
-  }
-
-}

library/src/main/java/com/google/android/exoplayer/text/subrip/SubripParser.java

@@ -17,8 +17,10 @@ package com.google.android.exoplayer.text.subrip;
 
 import com.google.android.exoplayer.C;
 import com.google.android.exoplayer.ParserException;
+import com.google.android.exoplayer.text.Cue;
 import com.google.android.exoplayer.text.SubtitleParser;
 import com.google.android.exoplayer.util.MimeTypes;
+import com.google.android.exoplayer.util.Util;
 
 import android.text.Html;
 import android.text.Spanned;
@@ -52,7 +54,8 @@ public final class SubripParser implements SubtitleParser {
   @Override
   public SubripSubtitle parse(InputStream inputStream, String inputEncoding, long startTimeUs)
           throws IOException {
-    ArrayList<SubripCue> cues = new ArrayList<>();
+    ArrayList<Cue> cues = new ArrayList<>();
+    ArrayList<Long> cueTimesUs = new ArrayList<>();
     BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, C.UTF8_NAME));
     String currentLine;
 
@@ -65,13 +68,11 @@ public final class SubripParser implements SubtitleParser {
       }
 
       // Read and parse the timing line.
-      long cueStartTimeUs;
-      long cueEndTimeUs;
       currentLine = reader.readLine();
       Matcher matcher = SUBRIP_TIMING_LINE.matcher(currentLine);
       if (matcher.find()) {
-        cueStartTimeUs = parseTimestampUs(matcher.group(1)) + startTimeUs;
-        cueEndTimeUs = parseTimestampUs(matcher.group(2)) + startTimeUs;
+        cueTimesUs.add(startTimeUs + parseTimestampUs(matcher.group(1)));
+        cueTimesUs.add(startTimeUs + parseTimestampUs(matcher.group(2)));
       } else {
         throw new ParserException("Expected timing line: " + currentLine);
       }
@@ -86,14 +87,16 @@ public final class SubripParser implements SubtitleParser {
       }
 
       Spanned text = Html.fromHtml(textBuilder.toString());
-      SubripCue cue = new SubripCue(cueStartTimeUs, cueEndTimeUs, text);
-      cues.add(cue);
+      cues.add(new Cue(text));
     }
 
     reader.close();
     inputStream.close();
-    SubripSubtitle subtitle = new SubripSubtitle(cues, startTimeUs);
-    return subtitle;
+
+    Cue[] cuesArray = new Cue[cues.size()];
+    cues.toArray(cuesArray);
+    long[] cueTimesUsArray = Util.toLongArray(cueTimesUs);
+    return new SubripSubtitle(startTimeUs, cuesArray, cueTimesUsArray);
   }
 
   @Override

library/src/main/java/com/google/android/exoplayer/text/subrip/SubripSubtitle.java

@@ -28,27 +28,20 @@ import java.util.List;
  */
 /* package */ final class SubripSubtitle implements Subtitle {
 
-  private final List<SubripCue> cues;
-  private final int numCues;
   private final long startTimeUs;
+
+  private final Cue[] cues;
   private final long[] cueTimesUs;
 
   /**
-   * @param cues A list of the cues in this subtitle.
-   * @param startTimeUs The start time of the subtitle.
+   * @param startTimeUs The start time of the subtitle, in microseconds.
+   * @param cues The cues in the subtitle.
+   * @param cueTimesUs Interleaved cue start and end times, in microseconds.
    */
-  public SubripSubtitle(List<SubripCue> cues, long startTimeUs) {
-    this.cues = cues;
+  public SubripSubtitle(long startTimeUs, Cue[] cues, long[] cueTimesUs) {
     this.startTimeUs = startTimeUs;
-
-    numCues = cues.size();
-    cueTimesUs = new long[2 * numCues];
-    for (int cueIndex = 0; cueIndex < numCues; cueIndex++) {
-      SubripCue cue = cues.get(cueIndex);
-      int arrayIndex = cueIndex * 2;
-      cueTimesUs[arrayIndex] = cue.startTime;
-      cueTimesUs[arrayIndex + 1] = cue.endTime;
-    }
+    this.cues = cues;
+    this.cueTimesUs = cueTimesUs;
   }
 
   @Override
@@ -58,7 +51,6 @@ import java.util.List;
 
   @Override
   public int getNextEventTimeIndex(long timeUs) {
-    Assertions.checkArgument(timeUs >= 0);
     int index = Util.binarySearchCeil(cueTimesUs, timeUs, false, false);
     return index < cueTimesUs.length ? index : -1;
   }
@@ -90,7 +82,7 @@ import java.util.List;
       // timeUs is earlier than the start of the first cue, or corresponds to a gap between cues.
       return Collections.<Cue>emptyList();
     } else {
-      return Collections.singletonList((Cue) cues.get(index / 2));
+      return Collections.singletonList(cues[index / 2]);
     }
   }
 

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

@@ -459,7 +459,7 @@ public final class Util {
    * @param list A list of integers.
    * @return The list in array form, or null if the input list was null.
    */
-  public static int[] toArray(List<Integer> list) {
+  public static int[] toIntArray(List<Integer> list) {
     if (list == null) {
       return null;
     }
@@ -471,6 +471,24 @@ public final class Util {
     return intArray;
   }
 
+  /**
+   * Converts a list of longs to a primitive array.
+   *
+   * @param list A list of longs.
+   * @return The list in array form, or null if the input list was null.
+   */
+  public static long[] toLongArray(List<Long> list) {
+    if (list == null) {
+      return null;
+    }
+    int length = list.size();
+    long[] longArray = new long[length];
+    for (int i = 0; i < length; i++) {
+      longArray[i] = list.get(i);
+    }
+    return longArray;
+  }
+
   /**
    * On platform API levels 19 and 20, okhttp's implementation of {@link InputStream#close} can
    * block for a long time if the stream has a lot of data remaining. Call this method before