Index: media/base/android/media_statistics.h |
diff --git a/media/base/android/media_statistics.h b/media/base/android/media_statistics.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e8279851826f8679906200b8045f886bbf7137b9 |
--- /dev/null |
+++ b/media/base/android/media_statistics.h |
@@ -0,0 +1,59 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef MEDIA_BASE_ANDROID_MEDIA_STATISTICS_H_ |
+#define MEDIA_BASE_ANDROID_MEDIA_STATISTICS_H_ |
+ |
+#include <stdint.h> |
+#include "base/time/time.h" |
+#include "media/base/demuxer_stream.h" |
+ |
+namespace media { |
+ |
+// FrameStatistics struct deals with frames of one stream, i.e. either |
+// audio or video. |
+struct FrameStatistics { |
+ DemuxerStream::Type stream_type; |
+ uint32_t total; |
qinmin
2015/09/29 23:47:44
provide comments on these variables.
Tima Vaisburd
2015/09/30 18:50:10
Done.
|
+ uint32_t late; |
+ |
+ FrameStatistics(DemuxerStream::Type type) |
+ : stream_type(type), total(0), late(0) {} |
+ |
+ void Clear() { total = late = 0; } |
+ void AddFrame(); |
+ void AddLateFrame(base::TimeDelta delay); |
+}; |
+ |
+// MediaStatistics class gathers and reports playback quality statistics to UMA. |
+// |
+// This class is not thread safe. The caller should guarantee that operations |
+// on FrameStatistics objects does not happen during Start() and |
+// StopAndReport(). The Start() and StopAndReport() methods need to be called |
+// sequantially. |
+ |
+class MediaStatistics { |
+ public: |
+ MediaStatistics(); |
+ ~MediaStatistics(); |
+ |
+ FrameStatistics& AudioFrames() { return audio_frames_; } |
qinmin
2015/09/29 23:47:44
audio_frames();
Tima Vaisburd
2015/09/30 18:50:09
Done.
|
+ FrameStatistics& VideoFrames() { return video_frames_; } |
qinmin
2015/09/29 23:47:44
video_frames()
Tima Vaisburd
2015/09/30 18:50:10
Done.
|
+ void Start(); |
qinmin
2015/09/29 23:47:44
comments on member functions
Tima Vaisburd
2015/09/30 18:50:09
Done.
|
+ void AddStarvation(); |
+ void StopAndReport(); |
+ |
+ private: |
+ void Clear(); |
+ void Report(base::TimeDelta duration); |
+ |
+ base::TimeTicks start_time_; |
+ FrameStatistics audio_frames_; |
+ FrameStatistics video_frames_; |
+ uint32_t num_starvations_; |
+}; |
+ |
+} // namespace media |
+ |
+#endif // MEDIA_BASE_ANDROID_MEDIA_STATISTICS_H_ |