diff --git a/services/inputflinger/TouchVideoDevice.h b/services/inputflinger/TouchVideoDevice.h
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+++ b/services/inputflinger/TouchVideoDevice.h
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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.
+ */
+
+#ifndef _INPUTFLINGER_TOUCH_VIDEO_DEVICE_H
+#define _INPUTFLINGER_TOUCH_VIDEO_DEVICE_H
+
+#include <array>
+#include <android-base/unique_fd.h>
+#include <input/TouchVideoFrame.h>
+#include <optional>
+#include <stdint.h>
+#include <string>
+#include <vector>
+
+namespace android {
+
+/**
+ * Represents a video device that uses v4l2 api to report touch heatmap data.
+ */
+class TouchVideoDevice {
+public:
+    /**
+     * Create a new TouchVideoDevice for the path provided.
+     * Return nullptr upon failure.
+     */
+    static std::unique_ptr<TouchVideoDevice> create(std::string devicePath);
+    ~TouchVideoDevice();
+
+    bool hasValidFd() const { return mFd.get() != INVALID_FD; }
+    /**
+     * Obtain the file descriptor associated with this video device.
+     * Could be used for adding to epoll.
+     */
+    int getFd() const { return mFd.get(); }
+    /**
+     * Get the name of this video device.
+     */
+    const std::string& getName() const { return mName; }
+    /**
+     * Get the file path of this video device.
+     */
+    const std::string& getPath() const { return mPath; }
+    /**
+     * Get the width of the heatmap frame
+     */
+    uint32_t getWidth() const { return mWidth; }
+    /**
+     * Get the height of the heatmap frame
+     */
+    uint32_t getHeight() const { return mHeight; }
+    /**
+     * Direct read of the frame. Stores the frame into internal buffer.
+     * Return the number of frames that were successfully read.
+     *
+     * This function should not be called unless buffer is ready!
+     * This must be checked with select, poll, epoll, or similar api first.
+     * If epoll indicates that there is data ready to read, but this function
+     * returns zero, then it is likely an error occurred.
+     */
+    size_t readAndQueueFrames();
+    /**
+     * Return all of the queued frames, and erase them from the local buffer.
+     * The returned frames are in the order that they were received from the
+     * v4l2 device, with the oldest frame at the index 0.
+     */
+    std::vector<TouchVideoFrame> consumeFrames();
+    /**
+     * Get string representation of this video device.
+     */
+    std::string dump() const;
+
+private:
+    android::base::unique_fd mFd;
+    std::string mName;
+    std::string mPath;
+
+    uint32_t mWidth;
+    uint32_t mHeight;
+
+    static constexpr int INVALID_FD = -1;
+    /**
+     * How many buffers to request for heatmap.
+     * The kernel driver will be allocating these buffers for us,
+     * and will provide memory locations to read these from.
+     */
+    static constexpr size_t NUM_BUFFERS = 3;
+    std::array<const int16_t*, NUM_BUFFERS> mReadLocations;
+    /**
+     * How many buffers to keep for the internal queue. When the internal buffer
+     * exceeds this capacity, oldest frames will be dropped.
+     */
+    static constexpr size_t MAX_QUEUE_SIZE = 10;
+    std::vector<TouchVideoFrame> mFrames;
+
+    /**
+     * The constructor is private because opening a v4l2 device requires many checks.
+     * To get a new TouchVideoDevice, use 'create' instead.
+     */
+    explicit TouchVideoDevice(int fd, std::string&& name, std::string&& devicePath,
+            uint32_t width, uint32_t height,
+            const std::array<const int16_t*, NUM_BUFFERS>& readLocations);
+    /**
+     * Read all currently available frames.
+     */
+    std::vector<TouchVideoFrame> readFrames();
+    /**
+     * Read a single frame. May return nullopt if no data is currently available for reading.
+     */
+    std::optional<TouchVideoFrame> readFrame();
+};
+} // namespace android
+#endif //_INPUTFLINGER_TOUCH_VIDEO_DEVICE_H