| // 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. |
| |
| #include "content/renderer/media/render_media_log.h" |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/message_loop/message_loop_proxy.h" |
| #include "content/common/view_messages.h" |
| #include "content/public/renderer/render_thread.h" |
| |
| namespace content { |
| |
| RenderMediaLog::RenderMediaLog() |
| : render_loop_(base::MessageLoopProxy::current()), |
| tick_clock_(new base::DefaultTickClock()), |
| last_ipc_send_time_(tick_clock_->NowTicks()) { |
| DCHECK(RenderThread::Get()) << |
| "RenderMediaLog must be constructed on the render thread"; |
| } |
| |
| void RenderMediaLog::AddEvent(scoped_ptr<media::MediaLogEvent> event) { |
| if (!RenderThread::Get()) { |
| render_loop_->PostTask(FROM_HERE, base::Bind( |
| &RenderMediaLog::AddEvent, this, base::Passed(&event))); |
| return; |
| } |
| |
| // Keep track of the latest buffered extents properties to avoid sending |
| // thousands of events over IPC. See http://crbug.com/352585 for details. |
| // |
| // TODO(scherkus): We should overhaul MediaLog entirely to have clearer |
| // separation of properties vs. events. |
| if (event->type == media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED) |
| last_buffered_extents_changed_event_.swap(event); |
| else |
| queued_media_events_.push_back(*event); |
| |
| // Limit the send rate of high frequency events. |
| base::TimeTicks curr_time = tick_clock_->NowTicks(); |
| if ((curr_time - last_ipc_send_time_) < base::TimeDelta::FromSeconds(1)) |
| return; |
| last_ipc_send_time_ = curr_time; |
| |
| if (last_buffered_extents_changed_event_) { |
| queued_media_events_.push_back(*last_buffered_extents_changed_event_); |
| last_buffered_extents_changed_event_.reset(); |
| } |
| |
| DVLOG(1) << "media log events array size " << queued_media_events_.size(); |
| |
| RenderThread::Get()->Send( |
| new ViewHostMsg_MediaLogEvents(queued_media_events_)); |
| queued_media_events_.clear(); |
| } |
| |
| RenderMediaLog::~RenderMediaLog() {} |
| |
| void RenderMediaLog::SetTickClockForTesting( |
| scoped_ptr<base::TickClock> tick_clock) { |
| tick_clock_.swap(tick_clock); |
| last_ipc_send_time_ = tick_clock_->NowTicks(); |
| } |
| |
| } // namespace content |