Use new-style for loops specifically for arrays.

As per: http://developer.android.com/training/articles/perf-tips.html
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=117716743

library/src/main/java/com/google/android/exoplayer/ExoPlayerImplInternal.java

@@ -285,8 +285,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 
     boolean allRenderersEnded = true;
     boolean allRenderersReadyOrEnded = true;
-    for (int rendererIndex = 0; rendererIndex < renderers.length; rendererIndex++) {
-      TrackRenderer renderer = renderers[rendererIndex];
+    for (TrackRenderer renderer : renderers) {
       allRenderersEnded = allRenderersEnded && renderer.isEnded();
       allRenderersReadyOrEnded = allRenderersReadyOrEnded && isReadyOrEnded(renderer);
     }

library/src/main/java/com/google/android/exoplayer/MediaCodecUtil.java

@@ -228,8 +228,8 @@ public final class MediaCodecUtil {
     }
 
     CodecProfileLevel[] profileLevels = info.getProfileLevels();
-    for (int i = 0; i < profileLevels.length; i++) {
-      if (profileLevels[i].profile == profile && profileLevels[i].level >= level) {
+    for (CodecProfileLevel profileLevel : profileLevels) {
+      if (profileLevel.profile == profile && profileLevel.level >= level) {
         return true;
       }
     }
@@ -250,8 +250,7 @@ public final class MediaCodecUtil {
 
     int maxH264DecodableFrameSize = 0;
     CodecProfileLevel[] profileLevels = info.getProfileLevels();
-    for (int i = 0; i < profileLevels.length; i++) {
-      CodecProfileLevel profileLevel = profileLevels[i];
+    for (CodecProfileLevel profileLevel : profileLevels) {
       maxH264DecodableFrameSize = Math.max(avcLevelToMaxFrameSize(profileLevel.level),
           maxH264DecodableFrameSize);
     }

library/src/main/java/com/google/android/exoplayer/MediaCodecVideoTrackRenderer.java

@@ -266,9 +266,9 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
     adaptiveMaxWidth = Format.NO_VALUE;
     adaptiveMaxHeight = Format.NO_VALUE;
     if (formats.length > 1) {
-      for (int i = 0; i < formats.length; i++) {
-        adaptiveMaxWidth = Math.max(adaptiveMaxWidth, formats[i].width);
-        adaptiveMaxHeight = Math.max(adaptiveMaxHeight, formats[i].height);
+      for (Format format : formats) {
+        adaptiveMaxWidth = Math.max(adaptiveMaxWidth, format.width);
+        adaptiveMaxHeight = Math.max(adaptiveMaxHeight, format.height);
       }
       if (adaptiveMaxWidth == Format.NO_VALUE
           || adaptiveMaxHeight == Format.NO_VALUE) {

library/src/main/java/com/google/android/exoplayer/MultiSampleSource.java

@@ -43,25 +43,25 @@ public final class MultiSampleSource implements SampleSource {
       return true;
     }
     boolean sourcesPrepared = true;
-    for (int i = 0; i < sources.length; i++) {
-      sourcesPrepared &= sources[i].prepare(positionUs);
+    for (SampleSource source : sources) {
+      sourcesPrepared &= source.prepare(positionUs);
     }
     if (sourcesPrepared) {
       prepared = true;
       durationUs = C.UNKNOWN_TIME_US;
       int totalTrackGroupCount = 0;
-      for (int i = 0; i < sources.length; i++) {
-        totalTrackGroupCount += sources[i].getTrackGroups().length;
-        if (sources[i].getDurationUs() > durationUs) {
-          durationUs = sources[i].getDurationUs();
+      for (SampleSource source : sources) {
+        totalTrackGroupCount += source.getTrackGroups().length;
+        if (source.getDurationUs() > durationUs) {
+          durationUs = source.getDurationUs();
         }
       }
       TrackGroup[] trackGroups = new TrackGroup[totalTrackGroupCount];
       int trackGroupIndex = 0;
-      for (int i = 0; i < sources.length; i++) {
-        int sourceTrackGroupCount = sources[i].getTrackGroups().length;
+      for (SampleSource source : sources) {
+        int sourceTrackGroupCount = source.getTrackGroups().length;
         for (int j = 0; j < sourceTrackGroupCount; j++) {
-          trackGroups[trackGroupIndex++] = sources[i].getTrackGroups().get(j);
+          trackGroups[trackGroupIndex++] = source.getTrackGroups().get(j);
         }
       }
       this.trackGroups = new TrackGroupArray(trackGroups);
@@ -91,15 +91,15 @@ public final class MultiSampleSource implements SampleSource {
 
   @Override
   public void continueBuffering(long positionUs) {
-    for (int i = 0; i < sources.length; i++) {
-      sources[i].continueBuffering(positionUs);
+    for (SampleSource source : sources) {
+      source.continueBuffering(positionUs);
     }
   }
 
   @Override
   public void seekToUs(long positionUs) {
-    for (int i = 0; i < sources.length; i++) {
-      sources[i].seekToUs(positionUs);
+    for (SampleSource source : sources) {
+      source.seekToUs(positionUs);
     }
   }
 
@@ -111,8 +111,8 @@ public final class MultiSampleSource implements SampleSource {
   @Override
   public long getBufferedPositionUs() {
     long bufferedPositionUs = durationUs != C.UNKNOWN_TIME_US ? durationUs : Long.MAX_VALUE;
-    for (int i = 0; i < sources.length; i++) {
-      long rendererBufferedPositionUs = sources[i].getBufferedPositionUs();
+    for (SampleSource source : sources) {
+      long rendererBufferedPositionUs = source.getBufferedPositionUs();
       if (rendererBufferedPositionUs == C.UNKNOWN_TIME_US) {
         return C.UNKNOWN_TIME_US;
       } else if (rendererBufferedPositionUs == C.END_OF_SOURCE_US) {
@@ -126,8 +126,8 @@ public final class MultiSampleSource implements SampleSource {
 
   @Override
   public void release() {
-    for (int i = 0; i < sources.length; i++) {
-      sources[i].release();
+    for (SampleSource source : sources) {
+      source.release();
     }
     prepared = false;
   }

library/src/main/java/com/google/android/exoplayer/extractor/mp4/Mp4Extractor.java

@@ -149,14 +149,14 @@ public final class Mp4Extractor implements Extractor, SeekMap {
   @Override
   public long getPosition(long timeUs) {
     long earliestSamplePosition = Long.MAX_VALUE;
-    for (int trackIndex = 0; trackIndex < tracks.length; trackIndex++) {
-      TrackSampleTable sampleTable = tracks[trackIndex].sampleTable;
+    for (Mp4Track track : tracks) {
+      TrackSampleTable sampleTable = track.sampleTable;
       int sampleIndex = sampleTable.getIndexOfEarlierOrEqualSynchronizationSample(timeUs);
       if (sampleIndex == TrackSampleTable.NO_SAMPLE) {
         // Handle the case where the requested time is before the first synchronization sample.
         sampleIndex = sampleTable.getIndexOfLaterOrEqualSynchronizationSample(timeUs);
       }
-      tracks[trackIndex].sampleIndex = sampleIndex;
+      track.sampleIndex = sampleIndex;
 
       long offset = sampleTable.offsets[sampleIndex];
       if (offset < earliestSamplePosition) {

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

@@ -595,8 +595,8 @@ public class HlsChunkSource {
       return false;
     }
     String[] codecArray = codecs.split("(\\s*,\\s*)|(\\s*$)");
-    for (int i = 0; i < codecArray.length; i++) {
-      if (codecArray[i].startsWith(prefix)) {
+    for (String codec : codecArray) {
+      if (codec.startsWith(prefix)) {
         return true;
       }
     }

library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlParser.java

@@ -160,8 +160,8 @@ public final class TtmlParser extends SubtitleParser {
         TtmlStyle style = parseStyleAttributes(xmlParser, new TtmlStyle());
         if (parentStyleId != null) {
           String[] ids = parseStyleIds(parentStyleId);
-          for (int i = 0; i < ids.length; i++) {
-            style.chain(globalStyles.get(ids[i]));
+          for (String id : ids) {
+            style.chain(globalStyles.get(id));
           }
         }
         if (style.getId() != null) {

library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlRenderUtil.java

@@ -46,8 +46,8 @@ import java.util.Map;
     } else if (style == null && styleIds.length > 1) {
       // only multiple referential styles present
       TtmlStyle chainedStyle = new TtmlStyle();
-      for (int i = 0; i < styleIds.length; i++) {
-        chainedStyle.chain(globalStyles.get(styleIds[i]));
+      for (String styleId : styleIds) {
+        chainedStyle.chain(globalStyles.get(styleId));
       }
       return chainedStyle;
     } else if (style != null && styleIds != null && styleIds.length == 1) {
@@ -55,8 +55,8 @@ import java.util.Map;
       return style.chain(globalStyles.get(styleIds[0]));
     } else if (style != null && styleIds != null && styleIds.length > 1) {
       // merge multiple referential styles into inline style
-      for (int i = 0; i < styleIds.length; i++) {
-        style.chain(globalStyles.get(styleIds[i]));
+      for (String styleId : styleIds) {
+        style.chain(globalStyles.get(styleId));
       }
       return style;
     }

library/src/main/java/com/google/android/exoplayer/text/webvtt/WebvttParserUtil.java

@@ -53,8 +53,8 @@ public final class WebvttParserUtil {
     long value = 0;
     String[] parts = timestamp.split("\\.", 2);
     String[] subparts = parts[0].split(":");
-    for (int i = 0; i < subparts.length; i++) {
-      value = value * 60 + Long.parseLong(subparts[i]);
+    for (String subpart : subparts) {
+      value = value * 60 + Long.parseLong(subpart);
     }
     return (value * 1000 + Long.parseLong(parts[1])) * 1000;
   }

library/src/main/java/com/google/android/exoplayer/upstream/cache/SimpleCache.java

@@ -240,8 +240,7 @@ public final class SimpleCache implements Cache {
     if (files == null) {
       return;
     }
-    for (int i = 0; i < files.length; i++) {
-      File file = files[i];
+    for (File file : files) {
       if (file.length() == 0) {
         file.delete();
       } else {

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

@@ -182,8 +182,8 @@ public final class Util {
    * @return True if the array contains an object equal to the item being searched for.
    */
   public static boolean contains(Object[] items, Object item) {
-    for (int i = 0; i < items.length; i++) {
-      if (Util.areEqual(items[i], item)) {
+    for (Object arrayItem : items) {
+      if (Util.areEqual(arrayItem, item)) {
         return true;
       }
     }

library/src/main/java/com/google/android/exoplayer/util/extensions/SimpleDecoder.java

@@ -83,8 +83,8 @@ public abstract class SimpleDecoder<I extends InputBuffer, O extends OutputBuffe
    */
   protected final void setInitialInputBufferSize(int size) {
     Assertions.checkState(availableInputBufferCount == availableInputBuffers.length);
-    for (int i = 0; i < availableInputBuffers.length; i++) {
-      availableInputBuffers[i].sampleHolder.ensureSpaceForWrite(size);
+    for (I inputBuffer : availableInputBuffers) {
+      inputBuffer.sampleHolder.ensureSpaceForWrite(size);
     }
   }