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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <ui/Rotation.h>
#include <stdint.h>
#include <sys/time.h>
#include <vector>
namespace android {
/**
* Represents data from a single scan of the touchscreen device.
* Similar in concept to a video frame, but the touch strength is used as
* the values instead.
*/
class TouchVideoFrame {
public:
TouchVideoFrame(uint32_t height, uint32_t width, std::vector<int16_t> data,
const struct timeval& timestamp);
bool operator==(const TouchVideoFrame& rhs) const;
/**
* Height of the frame
*/
uint32_t getHeight() const;
/**
* Width of the frame
*/
uint32_t getWidth() const;
/**
* The touch strength data.
* The array is a 2-D row-major matrix, with dimensions (height, width).
* Total size of the array should equal getHeight() * getWidth().
* Data is allowed to be negative.
*/
const std::vector<int16_t>& getData() const;
/**
* Time at which the heatmap was taken.
*/
const struct timeval& getTimestamp() const;
/**
* Rotate the video frame.
* The rotation value is an enum from ui/Rotation.h
*/
void rotate(ui::Rotation orientation);
private:
uint32_t mHeight;
uint32_t mWidth;
std::vector<int16_t> mData;
struct timeval mTimestamp;
/**
* Common method for 90 degree and 270 degree rotation
*/
void rotateQuarterTurn(bool clockwise);
void rotate180();
};
} // namespace android
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