MSE: Log buffered audio splice generation to media-internals

media/base/media_log.h

Index: media/base/media_log.h
diff --git a/media/base/media_log.h b/media/base/media_log.h
index 1e4b9464dd761a6deecf1616eaeabcec3ed6d38b..48b5e979ec205a9bb817f4ea32899d8c90c3f141 100644
--- a/media/base/media_log.h
+++ b/media/base/media_log.h
@@ -26,6 +26,36 @@ class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
     MEDIALOG_DEBUG,
   };
 
+  // Captures the parameter detail of a BUFFERED_AUDIO_SPLICE_STATISTICS_CHANGED

[DaleCurtis, 2015/07/14 23:37:47]

Instead of adding a class for this, do we just want to serialize a dict object
over the wire?  I.e., don't have this class, just store this info in the splicer
itself and call a function (count, degenerate_count, duration, min_duration,
max_duration)

+  // MediaLogEvent.
+  class AudioSpliceStatistics {
+   public:
+    AudioSpliceStatistics();
+    AudioSpliceStatistics(int count,
+                          int degenerate_count,
+                          double total_duration,

[DaleCurtis, 2015/07/14 23:37:47]

Why not TimeDelta for all these?

+                          double min_duration,
+                          double max_duration);
+
+    // Methods to update statistics.
+    void OnSplice(double duration);
+    void OnDegenerateSplice();
+
+    // Methods to retrieve statistics.
+    int count() const { return count_; }
+    int degenerate_count() const { return degenerate_count_; }
+    double AverageDuration() const;
+    double min_duration() const { return min_duration_; }
+    double max_duration() const { return max_duration_; }
+
+   private:
+    int count_;
+    int degenerate_count_;
+    double total_duration_;
+    double min_duration_;
+    double max_duration_;
+  };
+
   // Convert various enums to strings.
   static std::string MediaLogLevelToString(MediaLogLevel level);
   static MediaLogEvent::Type MediaLogLevelToEventType(MediaLogLevel level);
@@ -59,6 +89,8 @@ class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
       size_t width, size_t height);
   scoped_ptr<MediaLogEvent> CreateBufferedExtentsChangedEvent(
       int64 start, int64 current, int64 end);
+  scoped_ptr<MediaLogEvent> CreateBufferedSpliceStatisticsChangedEvent(
+      const AudioSpliceStatistics& statistics);
 
   // Report a log message at the specified log level.
   void AddLogEvent(MediaLogLevel level, const std::string& message);