vendor/khanamiryan/qrcode-detector-decoder/lib/PlanarYUVLuminanceSource.php

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<?php
/*
 * Copyright 2009 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.
 */

namespace Zxing;

/**
 * This object extends LuminanceSource around an array of YUV data returned from the camera driver,
 * with the option to crop to a rectangle within the full data. This can be used to exclude
 * superfluous pixels around the perimeter and speed up decoding.
 *
 * It works for any pixel format where the Y channel is planar and appears first, including
 * YCbCr_420_SP and YCbCr_422_SP.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
final class PlanarYUVLuminanceSource extends LuminanceSource {

private static  $THUMBNAIL_SCALE_FACTOR = 2;

private $yuvData;
private $dataWidth;
private $dataHeight;
private $left;
private $top;

public function __construct($yuvData,
$dataWidth,
$dataHeight,
$left,
$top,
$width,
$height,
$reverseHorizontal) {
parent::__construct($width, $height);

if ($left + $width > $dataWidth || $top + $height > $dataHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}

    $this->yuvData = $yuvData;
    $this->dataWidth = $dataWidth;
    $this->dataHeight = $dataHeight;
    $this->left = $left;
    $this->top = $top;
    if ($reverseHorizontal) {
        $this->reverseHorizontal($width, $height);