1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _LIBINPUT_TOUCHVIDEOFRAME_H 18 #define _LIBINPUT_TOUCHVIDEOFRAME_H 19 20 #include <stdint.h> 21 #include <sys/time.h> 22 #include <vector> 23 24 namespace android { 25 26 /** 27 * Represents data from a single scan of the touchscreen device. 28 * Similar in concept to a video frame, but the touch strength is used as 29 * the values instead. 30 */ 31 class TouchVideoFrame { 32 public: 33 TouchVideoFrame(uint32_t height, uint32_t width, std::vector<int16_t> data, 34 const struct timeval& timestamp); 35 36 bool operator==(const TouchVideoFrame& rhs) const; 37 38 /** 39 * Height of the frame 40 */ 41 uint32_t getHeight() const; 42 /** 43 * Width of the frame 44 */ 45 uint32_t getWidth() const; 46 /** 47 * The touch strength data. 48 * The array is a 2-D row-major matrix, with dimensions (height, width). 49 * Total size of the array should equal getHeight() * getWidth(). 50 * Data is allowed to be negative. 51 */ 52 const std::vector<int16_t>& getData() const; 53 /** 54 * Time at which the heatmap was taken. 55 */ 56 const struct timeval& getTimestamp() const; 57 58 /** 59 * Rotate the video frame. 60 * The rotation value is an enum from ui/Rotation.h 61 */ 62 void rotate(int32_t orientation); 63 64 private: 65 uint32_t mHeight; 66 uint32_t mWidth; 67 std::vector<int16_t> mData; 68 struct timeval mTimestamp; 69 70 /** 71 * Common method for 90 degree and 270 degree rotation 72 */ 73 void rotateQuarterTurn(bool clockwise); 74 void rotate180(); 75 }; 76 77 } // namespace android 78 79 #endif // _LIBINPUT_TOUCHVIDEOFRAME_H 80