media/base/android/media_statistics.cc - Issue 2283493003: Delete browser MSE implementation.

Side by Side Diff: media/base/android/media_statistics.cc

Issue 2283493003: Delete browser MSE implementation. (Closed)

Patch Set: Actually delete MSP. Cleanse references. Remove AudioTrack usage. Created 4 years, 2 months ago

Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.

Jump to:

OLD	NEW
	(Empty)
1 // Copyright 2015 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 #include "media/base/android/media_statistics.h"

6

7 #include "base/logging.h"

8 #include "base/metrics/histogram_macros.h"

9 #include "media/base/android/demuxer_stream_player_params.h"

10

11 namespace media {

12

13 // Minimum playback interval to report.

14 const int kMinDurationInSeconds = 2;

15

16 // Maximum playback interval to report.

17 const int kMaxDurationInSeconds = 3600;

18

19 // Number of slots in the histogram for playback interval.

20 const int kNumDurationSlots = 50;

21

22 // For easier reading.

23 const int kOneMillion = 1000000;

24

25 void FrameStatistics::IncrementLateFrameCount() {

26 // Do not collect the late frame if this is the first frame after the start.

27 // Right now we do not want to consider the late video frame which is the

28 // first after preroll, preroll may be inacurate in this respect.

29 // The first audio frame cannot be late by definition and by not considering

30 // it we can simplify audio decoder code.

31 if (total == 1)

32 return;

33

34 ++late;

35 }

36

37 MediaStatistics::MediaStatistics() {}

38

39 MediaStatistics::~MediaStatistics() {}

40

41 void MediaStatistics::Start(base::TimeDelta current_playback_time) {

42 DVLOG(1) << __FUNCTION__;

43

44 if (start_time_ == kNoTimestamp) {

45 Clear();

46 start_time_ = current_playback_time;

47 }

48 }

49

50 void MediaStatistics::StopAndReport(base::TimeDelta current_playback_time) {

51 DVLOG(1) << __FUNCTION__;

52

53 if (start_time_ == kNoTimestamp)

54 return; // skip if there was no prior Start().

55

56 if (current_playback_time == kNoTimestamp) {

57 // Cancel the start event and skip if current time is unknown.

58 start_time_ = kNoTimestamp;

59 return;

60 }

61

62 base::TimeDelta duration = current_playback_time - start_time_;

63

64 // Reset start time.

65 start_time_ = kNoTimestamp;

66

67 if (duration < base::TimeDelta::FromSeconds(kMinDurationInSeconds))

68 return; // duration is too short.

69

70 if (duration > base::TimeDelta::FromSeconds(kMaxDurationInSeconds))

71 return; // duration is too long.

72

73 Report(duration);

74 }

75

76 void MediaStatistics::Clear() {

77 start_time_ = kNoTimestamp;

78 audio_frame_stats_.Clear();

79 video_frame_stats_.Clear();

80 num_starvations_ = 0;

81 }

82

83 void MediaStatistics::Report(base::TimeDelta duration) {

84 DVLOG(1) << __FUNCTION__ << " duration:" << duration

85 << " audio frames:"

86 << audio_frame_stats_.late << "/" << audio_frame_stats_.total

87 << " video frames:"

88 << video_frame_stats_.late << "/" << video_frame_stats_.total

89 << " starvations:" << num_starvations_;

90

91 // Playback duration is the time interval between the moment playback starts

92 // and the moment it is interrupted either by stopping or by seeking, changing

93 // to full screen, minimizing the browser etc. The interval is measured by

94 // media time.

95

96 UMA_HISTOGRAM_CUSTOM_TIMES(

97 "Media.MSE.PlaybackDuration", duration,
wolenetz 2016/09/30 23:23:23 Deprecate this in histograms.xml? Deprecate this in histograms.xml? DaleCurtis 2016/09/30 23:34:24 Done. Show quoted text On 2016/09/30 23:23:23, wolenetz wrote: > Deprecate this in histograms.xml? Done.
98 base::TimeDelta::FromSeconds(kMinDurationInSeconds),

99 base::TimeDelta::FromSeconds(kMaxDurationInSeconds), kNumDurationSlots);

100

101 // Number of late frames per one million frames.

102

103 if (audio_frame_stats_.total) {

104 UMA_HISTOGRAM_COUNTS(

105 "Media.MSE.LateAudioFrames",
wolenetz 2016/09/30 23:23:23 ditto ditto DaleCurtis 2016/09/30 23:34:24 Done. Show quoted text On 2016/09/30 23:23:23, wolenetz wrote: > ditto Done.
106 kOneMillion * audio_frame_stats_.late / audio_frame_stats_.total);

107 }

108

109 if (video_frame_stats_.total) {

110 UMA_HISTOGRAM_COUNTS(

111 "Media.MSE.LateVideoFrames",
wolenetz 2016/09/30 23:23:23 ditto ditto DaleCurtis 2016/09/30 23:34:24 Done. Show quoted text On 2016/09/30 23:23:23, wolenetz wrote: > ditto Done.
112 kOneMillion * video_frame_stats_.late / video_frame_stats_.total);

113 }

114

115 // Number of starvations per one million frames.

116

117 uint32_t total_frames = audio_frame_stats_.total ? audio_frame_stats_.total

118 : video_frame_stats_.total;

119 if (total_frames) {

120 UMA_HISTOGRAM_COUNTS("Media.MSE.Starvations",
wolenetz 2016/09/30 23:23:23 ditto ditto DaleCurtis 2016/09/30 23:34:24 Done. Show quoted text On 2016/09/30 23:23:23, wolenetz wrote: > ditto Done.
121 kOneMillion * num_starvations_ / total_frames);

122 }

123 }

124

125 } // namespace media

OLD	NEW

« media/base/android/media_codec_bridge.h ('K') | « media/base/android/media_statistics.h ('k') | media/base/android/sdk_media_codec_bridge.h » ('j') | no next file with comments »