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| 1 // Copyright 2015 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 UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ |
| 6 #define UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ |
| 7 |
| 8 #include <bitset> |
| 9 #include <vector> |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 #include "base/time/time.h" |
| 13 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h" |
| 14 #include "ui/events/ozone/evdev/touch_evdev_types.h" |
| 15 |
| 16 namespace ui { |
| 17 class TouchNoiseFilter; |
| 18 |
| 19 // Finds touches which are likely touch noise. |
| 20 class EVENTS_OZONE_EVDEV_EXPORT TouchNoiseFinder { |
| 21 public: |
| 22 TouchNoiseFinder(); |
| 23 ~TouchNoiseFinder(); |
| 24 |
| 25 // Updates which ABS_MT_SLOTs are likely noise. |touches| should contain all |
| 26 // of the in-progress touches at |time| (including suspected noisy touches). |
| 27 // |touches| should have at most one entry per ABS_MT_SLOT. |
| 28 void HandleTouches(const std::vector<InProgressTouchEvdev>& touches, |
| 29 base::TimeDelta time); |
| 30 |
| 31 // Returns whether the in-progress touch at ABS_MT_SLOT |slot| is likely |
| 32 // noise. |
| 33 bool SlotHasNoise(size_t slot) const; |
| 34 |
| 35 private: |
| 36 friend class TouchEventConverterEvdevTouchNoiseTest; |
| 37 |
| 38 // The slots which are likely noise. |
| 39 std::bitset<kNumTouchEvdevSlots> slots_with_noise_; |
| 40 |
| 41 std::vector<TouchNoiseFilter*> filters_; |
| 42 |
| 43 DISALLOW_COPY_AND_ASSIGN(TouchNoiseFinder); |
| 44 }; |
| 45 |
| 46 } // namespace ui |
| 47 |
| 48 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_NOISE_TOUCH_NOISE_FINDER_H_ |
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