/*
 * Copyright (C) 2016 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.camera.provider@2.4;

import android.hardware.camera.common@1.0::types;

/**
 * Callback functions for a camera provider HAL to use to inform the camera
 * service of changes to the camera subsystem.
 */
interface ICameraProviderCallback {

    /**
     * cameraDeviceStatusChange:
     *
     * Callback to the camera service to indicate that the state of a specific
     * camera device has changed.
     *
     * On camera service startup, when ICameraProvider::setCallback is invoked,
     * the camera service must assume that all internal camera devices are in
     * the CAMERA_DEVICE_STATUS_PRESENT state.
     *
     * The provider must call this method to inform the camera service of any
     * initially NOT_PRESENT devices, and of any external camera devices that
     * are already present, as soon as the callbacks are available through
     * setCallback.
     *
     * @param cameraDeviceName The name of the camera device that has a
     *     new status.
     * @param newStatus The new status that device is in.
     *
     */
    cameraDeviceStatusChange(string cameraDeviceName,
            CameraDeviceStatus newStatus);

    /**
     * torchModeStatusChange:
     *
     * Callback to the camera service to indicate that the state of the torch
     * mode of the flash unit associated with a specific camera device has
     * changed. At provider registration time, the camera service must assume
     * the torch modes are in the TORCH_MODE_STATUS_AVAILABLE_OFF state if
     * android.flash.info.available is reported as true via the
     * ICameraDevice::getCameraCharacteristics call.
     *
     * @param cameraDeviceName The name of the camera device that has a
     *     new status.
     * @param newStatus The new status that device is in.
     *
     */
    torchModeStatusChange(string cameraDeviceName,
            TorchModeStatus newStatus);

};