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| 1 // Copyright 2014 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 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H_ |
| 6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H_ |
| 7 |
| 8 #include <map> |
| 9 #include <string> |
| 10 |
| 11 #include "base/time/time.h" |
| 12 #include "content/public/browser/browser_message_filter.h" |
| 13 |
| 14 namespace content { |
| 15 |
| 16 // Responsible for logging metrics about audio and video track |
| 17 // lifetimes. These are based on messages from the renderer that are |
| 18 // sent when tracks are created and destroyed. Unfortunately we can't |
| 19 // reliably log the lifetime metric in the renderer because that |
| 20 // process may be destroyed at any time by the fast shutdown path (see |
| 21 // RenderProcessHost::FastShutdownIfPossible). |
| 22 // |
| 23 // There is one instance of this class per render process. |
| 24 // |
| 25 // If the renderer process goes away without sending messages that |
| 26 // tracks were removed, this class instead infers that the tracks were |
| 27 // removed. |
| 28 class MediaStreamTrackMetricsHost |
| 29 : public BrowserMessageFilter { |
| 30 public: |
| 31 explicit MediaStreamTrackMetricsHost(); |
| 32 |
| 33 protected: |
| 34 virtual ~MediaStreamTrackMetricsHost(); |
| 35 |
| 36 // BrowserMessageFilter override. |
| 37 virtual bool OnMessageReceived(const IPC::Message& message, |
| 38 bool* message_was_ok) OVERRIDE; |
| 39 |
| 40 private: |
| 41 void OnAddTrack(uint64 id, bool is_audio, bool is_remote); |
| 42 void OnRemoveTrack(uint64 id); |
| 43 |
| 44 void ReportDuration(bool is_audio, base::TimeTicks start_time); |
| 45 |
| 46 // Keys are unique (per renderer) track IDs, values are pairs: A |
| 47 // boolean indicating whether the track is an audio track, and a |
| 48 // timestamp from when the track was created. |
| 49 typedef std::pair<bool, base::TimeTicks> IsAudioPlusTimestamp; |
| 50 typedef std::map<uint64, IsAudioPlusTimestamp> TrackMap; |
| 51 TrackMap tracks_; |
| 52 }; |
| 53 |
| 54 } // namespace content |
| 55 |
| 56 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H
_ |
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