Merge "Add an InputClassifier HAL"

            <instance>default</instance>

        </interface>

    </hal>

    <hal format="hidl" optional="true">

        <name>android.hardware.input.classifier</name>

        <version>1.0</version>

        <interface>

            <name>IInputClassifier</name>

            <instance>default</instance>

        </interface>

    </hal>

    <hal format="hidl" optional="false">

        <name>android.hardware.keymaster</name>

        <version>3.0</version>

// This file is autogenerated by hidl-gen -Landroidbp.

hidl_interface {

    name: "android.hardware.input.classifier@1.0",

    root: "android.hardware",

    vndk: {

        enabled: true,

    },

    srcs: [

        "types.hal",

        "IInputClassifier.hal",

    ],

    interfaces: [

        "android.hidl.base@1.0",

    ],

    types: [

        "Action",

        "Axis",

        "Button",

        "Classification",

        "EdgeFlag",

        "Flag",

        "Meta",

        "MotionEvent",

        "PointerCoords",

        "PointerProperties",

        "PolicyFlag",

        "Source",

        "SourceClass",

        "ToolType",

        "VideoFrame",

    ],

    gen_java: true,

}

/*

 * Copyright (C) 2019 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.

 */

package android.hardware.input.classifier@1.0;

interface IInputClassifier {

  /**

   * Returns the classification for the current sequence of input events.

   */

  classify(MotionEvent event) generates (Classification classification);

};

cc_binary {

    name: "android.hardware.input.classifier@1.0-service-example",

    init_rc: ["android.hardware.input.classifier@1.0-service-example.rc"],

    relative_install_path: "hw",

    vendor: true,

    vintf_fragments: ["manifest_input.classifier.xml"],

    srcs: [

        "InputClassifier.cpp",

        "service.cpp",

    ],

    shared_libs: [

        "android.hardware.input.classifier@1.0",

        "libhidlbase",

        "libhidltransport",

        "liblog",

        "libutils",

    ],

    cflags: [

        "-Wall",

        "-Werror",

        "-Wextra",

    ],

}

/*

 * Copyright (C) 2019 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.

 */

#define LOG_TAG "InputClassifierHAL"

#include "InputClassifier.h"

#include <inttypes.h>

#include <log/log.h>

#include <utils/Timers.h>

using namespace android::hardware::input::classifier::V1_0;

namespace android {

namespace hardware {

namespace input {

namespace classifier {

namespace V1_0 {

namespace implementation {

// Methods from ::android::hardware::input::classifier::V1_0::IInputClassifier follow.

Return<Classification> InputClassifier::classify(const MotionEvent& event) {

    /**

     * In this example implementation, we will see how many "pixels" inside the video frame

     * exceed the value of 250. If more than 6 such pixels are present, then treat the event

     * as a "DEEP_PRESS".

     */

    if (event.frames.size() == 0) {

        return Classification::NONE;

    }

    ALOGI("Frame(O) timestamp = %" PRIu64 ", received %zu frame(s)", event.frames[0].timestamp,

          event.frames.size());

    for (const VideoFrame& frame : event.frames) {

        size_t count = 0;

        for (size_t i = 0; i < frame.data.size(); i++) {

            if (frame.data[i] > 250) {

                count++;

            }

        }

        if (count > 6) {

            return Classification::DEEP_PRESS;

        }

    }

    return Classification::NONE;

}

}  // namespace implementation

}  // namespace V1_0

}  // namespace classifier

}  // namespace input

}  // namespace hardware

}  // namespace android