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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/browser/renderer_host/media/video_capture_oracle.h" | 5 #include "content/browser/renderer_host/media/video_capture_oracle.h" |
6 | 6 |
7 #include "base/debug/trace_event.h" | 7 #include "base/debug/trace_event.h" |
8 | 8 |
9 namespace content { | 9 namespace content { |
10 | 10 |
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123 | 123 |
124 bool was_paused = overdue_sample_count_ == redundant_capture_goal_; | 124 bool was_paused = overdue_sample_count_ == redundant_capture_goal_; |
125 if (HasUnrecordedEvent()) { | 125 if (HasUnrecordedEvent()) { |
126 last_sample_ = current_event_; | 126 last_sample_ = current_event_; |
127 overdue_sample_count_ = 0; | 127 overdue_sample_count_ = 0; |
128 } else { | 128 } else { |
129 ++overdue_sample_count_; | 129 ++overdue_sample_count_; |
130 } | 130 } |
131 bool is_paused = overdue_sample_count_ == redundant_capture_goal_; | 131 bool is_paused = overdue_sample_count_ == redundant_capture_goal_; |
132 | 132 |
133 LOG_IF(INFO, !was_paused && is_paused) | 133 VLOG_IF(0, !was_paused && is_paused) |
134 << "Tab content unchanged for " << redundant_capture_goal_ | 134 << "Tab content unchanged for " << redundant_capture_goal_ |
135 << " frames; capture will halt until content changes."; | 135 << " frames; capture will halt until content changes."; |
136 LOG_IF(INFO, was_paused && !is_paused) | 136 VLOG_IF(0, was_paused && !is_paused) |
137 << "Content changed; capture will resume."; | 137 << "Content changed; capture will resume."; |
138 } | 138 } |
139 | 139 |
140 bool SmoothEventSampler::IsOverdueForSamplingAt(base::Time event_time) const { | 140 bool SmoothEventSampler::IsOverdueForSamplingAt(base::Time event_time) const { |
141 DCHECK(!event_time.is_null()); | 141 DCHECK(!event_time.is_null()); |
142 | 142 |
143 // If we don't get events on compositor updates on this platform, then we | 143 // If we don't get events on compositor updates on this platform, then we |
144 // don't reliably know whether we're dirty. | 144 // don't reliably know whether we're dirty. |
145 if (events_are_reliable_) { | 145 if (events_are_reliable_) { |
146 if (!HasUnrecordedEvent() && | 146 if (!HasUnrecordedEvent() && |
147 overdue_sample_count_ >= redundant_capture_goal_) { | 147 overdue_sample_count_ >= redundant_capture_goal_) { |
148 return false; // Not dirty. | 148 return false; // Not dirty. |
149 } | 149 } |
150 } | 150 } |
151 | 151 |
152 // If we're dirty but not yet old, then we've recently gotten updates, so we | 152 // If we're dirty but not yet old, then we've recently gotten updates, so we |
153 // won't request a sample just yet. | 153 // won't request a sample just yet. |
154 base::TimeDelta dirty_interval = event_time - last_sample_; | 154 base::TimeDelta dirty_interval = event_time - last_sample_; |
155 if (dirty_interval < capture_period_ * 4) | 155 if (dirty_interval < capture_period_ * 4) |
156 return false; | 156 return false; |
157 else | 157 else |
158 return true; | 158 return true; |
159 } | 159 } |
160 | 160 |
161 bool SmoothEventSampler::HasUnrecordedEvent() const { | 161 bool SmoothEventSampler::HasUnrecordedEvent() const { |
162 return !current_event_.is_null() && current_event_ != last_sample_; | 162 return !current_event_.is_null() && current_event_ != last_sample_; |
163 } | 163 } |
164 | 164 |
165 } // namespace content | 165 } // namespace content |
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