/*  _____ _
 * |_   _| |_  _ _ ___ ___ _ __  __ _
 *   | | | ' \| '_/ -_) -_) '  \/ _` |_
 *   |_| |_||_|_| \___\___|_|_|_\__,_(_)
 *
 * Threema for Android
 * Copyright (c) 2019-2020 Threema GmbH
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

/*
 * Copyright (C) 2010 ZXing authors
 *
 * 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 ch.threema.app.qrscanner.camera;

import android.graphics.Point;
import android.hardware.Camera;
import android.os.Handler;
import android.os.Message;

/**
 * @date 2016-11-23 15:39
 * @auther GuoJinyu
 * @description modified
 */

final class PreviewCallback implements Camera.PreviewCallback {

	private static final String TAG = PreviewCallback.class.getSimpleName();

	private final CameraConfigurationManager configManager;
	private Handler previewHandler;
	private int previewMessage;

	PreviewCallback(CameraConfigurationManager configManager) {
		this.configManager = configManager;
	}

	void setHandler(Handler previewHandler, int previewMessage) {
		this.previewHandler = previewHandler;
		this.previewMessage = previewMessage;
	}

	@Override
	public void onPreviewFrame(byte[] data, Camera camera) {
		Point cameraResolution = configManager.getCameraResolution();
		Handler thePreviewHandler = previewHandler;
		if (cameraResolution != null && thePreviewHandler != null) {
			Message message;
			Point screenResolution = configManager.getScreenResolution();
			if (screenResolution.x < screenResolution.y) {
				// portrait
				message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.y,
						cameraResolution.x, data);
			} else {
				// landscape
				message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
						cameraResolution.y, data);
			}
			message.sendToTarget();
			previewHandler = null;
		} else {
			//Log.d(TAG, "Got preview callback, but no handler or resolution available");
		}
	}

}
