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Side by Side Diff: device/capture/content/animated_content_sampler.cc

Issue 2214533002: move //media/capture to //device/capture (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 4 months ago
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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2015 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 "media/capture/content/animated_content_sampler.h" 5 #include "device/capture/content/animated_content_sampler.h"
6 6
7 #include <stddef.h> 7 #include <stddef.h>
8 #include <stdint.h> 8 #include <stdint.h>
9 9
10 #include <algorithm> 10 #include <algorithm>
11 11
12 namespace media { 12 namespace device {
13 13
14 namespace { 14 namespace {
15 15
16 // These specify the minimum/maximum amount of recent event history to examine 16 // These specify the minimum/maximum amount of recent event history to examine
17 // to detect animated content. If the values are too low, there is a greater 17 // to detect animated content. If the values are too low, there is a greater
18 // risk of false-positive detections and low accuracy. If they are too high, 18 // risk of false-positive detections and low accuracy. If they are too high,
19 // the the implementation will be slow to lock-in/out, and also will not react 19 // the the implementation will be slow to lock-in/out, and also will not react
20 // well to mildly-variable frame rate content (e.g., 25 +/- 1 FPS). 20 // well to mildly-variable frame rate content (e.g., 25 +/- 1 FPS).
21 // 21 //
22 // These values were established by experimenting with a wide variety of 22 // These values were established by experimenting with a wide variety of
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286 sampling_period = ratio * animation_period; 286 sampling_period = ratio * animation_period;
287 } else { 287 } else {
288 sampling_period = (ratio + 1) * animation_period; 288 sampling_period = (ratio + 1) * animation_period;
289 } 289 }
290 } else { 290 } else {
291 sampling_period = animation_period; 291 sampling_period = animation_period;
292 } 292 }
293 return std::max(sampling_period, min_capture_period); 293 return std::max(sampling_period, min_capture_period);
294 } 294 }
295 295
296 } // namespace media 296 } // namespace device
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