Add some useful Systrace

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

@@ -19,6 +19,7 @@ import com.google.android.exoplayer.MediaCodecUtil.DecoderQueryException;
 import com.google.android.exoplayer.drm.DrmInitData;
 import com.google.android.exoplayer.drm.DrmInitData;
 import com.google.android.exoplayer.drm.DrmSessionManager;
 import com.google.android.exoplayer.drm.DrmSessionManager;
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.Assertions;
+import com.google.android.exoplayer.util.TraceUtil;
 import com.google.android.exoplayer.util.Util;
 import com.google.android.exoplayer.util.Util;
 
 
 import android.annotation.TargetApi;
 import android.annotation.TargetApi;
@@ -362,9 +363,15 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
     codecIsAdaptive = decoderInfo.adaptive;
     codecIsAdaptive = decoderInfo.adaptive;
     try {
     try {
       long codecInitializingTimestamp = SystemClock.elapsedRealtime();
       long codecInitializingTimestamp = SystemClock.elapsedRealtime();
+      TraceUtil.beginSection("createByCodecName(" + decoderName + ")");
       codec = MediaCodec.createByCodecName(decoderName);
       codec = MediaCodec.createByCodecName(decoderName);
+      TraceUtil.endSection();
+      TraceUtil.beginSection("configureCodec");
       configureCodec(codec, decoderName, format.getFrameworkMediaFormatV16(), mediaCrypto);
       configureCodec(codec, decoderName, format.getFrameworkMediaFormatV16(), mediaCrypto);
+      TraceUtil.endSection();
+      TraceUtil.beginSection("codec.start()");
       codec.start();
       codec.start();
+      TraceUtil.endSection();
       long codecInitializedTimestamp = SystemClock.elapsedRealtime();
       long codecInitializedTimestamp = SystemClock.elapsedRealtime();
       notifyDecoderInitialized(decoderName, codecInitializedTimestamp,
       notifyDecoderInitialized(decoderName, codecInitializedTimestamp,
           codecInitializedTimestamp - codecInitializingTimestamp);
           codecInitializedTimestamp - codecInitializingTimestamp);
@@ -499,10 +506,12 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
         maybeInitCodec();
         maybeInitCodec();
       }
       }
       if (codec != null) {
       if (codec != null) {
+        TraceUtil.beginSection("drainAndFeed");
         while (drainOutputBuffer(positionUs, elapsedRealtimeUs)) {}
         while (drainOutputBuffer(positionUs, elapsedRealtimeUs)) {}
         if (feedInputBuffer(true)) {
         if (feedInputBuffer(true)) {
           while (feedInputBuffer(false)) {}
           while (feedInputBuffer(false)) {}
         }
         }
+        TraceUtil.endSection();
       }
       }
       codecCounters.ensureUpdated();
       codecCounters.ensureUpdated();
     } catch (IOException e) {
     } catch (IOException e) {

library/src/main/java/com/google/android/exoplayer/upstream/Loader.java

@@ -16,6 +16,7 @@
 package com.google.android.exoplayer.upstream;
 package com.google.android.exoplayer.upstream;
 
 
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.Assertions;
+import com.google.android.exoplayer.util.TraceUtil;
 import com.google.android.exoplayer.util.Util;
 import com.google.android.exoplayer.util.Util;
 
 
 import android.annotation.SuppressLint;
 import android.annotation.SuppressLint;
@@ -204,7 +205,9 @@ public final class Loader {
       try {
       try {
         executorThread = Thread.currentThread();
         executorThread = Thread.currentThread();
         if (!loadable.isLoadCanceled()) {
         if (!loadable.isLoadCanceled()) {
+          TraceUtil.beginSection(loadable.getClass().getSimpleName() + ".load()");
           loadable.load();
           loadable.load();
+          TraceUtil.endSection();
         }
         }
         sendEmptyMessage(MSG_END_OF_SOURCE);
         sendEmptyMessage(MSG_END_OF_SOURCE);
       } catch (IOException e) {
       } catch (IOException e) {