| // Copyright (c) 2012 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 CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_ |
| #define CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_ |
| |
| #include <vector> |
| |
| #include "base/time/time.h" |
| #include "content/common/content_export.h" |
| #include "media/base/media_log.h" |
| |
| namespace base { |
| class MessageLoopProxy; |
| } |
| |
| namespace content { |
| |
| // RenderMediaLog is an implementation of MediaLog that forwards events to the |
| // browser process, throttling as necessary. |
| // |
| // To minimize the number of events sent over the wire, only the latest event |
| // added is sent for high frequency events (e.g., BUFFERED_EXTENTS_CHANGED). |
| class CONTENT_EXPORT RenderMediaLog : public media::MediaLog { |
| public: |
| RenderMediaLog(); |
| |
| // MediaLog implementation. |
| virtual void AddEvent(scoped_ptr<media::MediaLogEvent> event) OVERRIDE; |
| |
| // Will reset |last_ipc_send_time_| with the value of NowTicks(). |
| void SetTickClockForTesting(scoped_ptr<base::TickClock> tick_clock); |
| |
| private: |
| virtual ~RenderMediaLog(); |
| |
| scoped_refptr<base::MessageLoopProxy> render_loop_; |
| scoped_ptr<base::TickClock> tick_clock_; |
| base::TimeTicks last_ipc_send_time_; |
| std::vector<media::MediaLogEvent> queued_media_events_; |
| |
| // Limits the number buffered extents changed events we send over IPC to one. |
| scoped_ptr<media::MediaLogEvent> last_buffered_extents_changed_event_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RenderMediaLog); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_ |