"use strict";
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/*
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* Copyright 2013 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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// package com.google.zxing.pdf417.decoder;
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// import com.google.zxing.common.detector.MathUtils;
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var MathUtils_1 = require("../../common/detector/MathUtils");
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// import com.google.zxing.pdf417.PDF417Common;
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var PDF417Common_1 = require("../PDF417Common");
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var Float_1 = require("../../util/Float");
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/**
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* @author Guenther Grau
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* @author creatale GmbH (christoph.schulz@creatale.de)
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*/
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var PDF417CodewordDecoder = /** @class */ (function () {
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function PDF417CodewordDecoder() {
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}
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/* @note
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* this action have to be performed before first use of class
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* - static constructor
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* working with 32bit float (based from Java logic)
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*/
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PDF417CodewordDecoder.initialize = function () {
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// Pre-computes the symbol ratio table.
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for ( /*int*/var i = 0; i < PDF417Common_1.default.SYMBOL_TABLE.length; i++) {
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var currentSymbol = PDF417Common_1.default.SYMBOL_TABLE[i];
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var currentBit = currentSymbol & 0x1;
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for ( /*int*/var j = 0; j < PDF417Common_1.default.BARS_IN_MODULE; j++) {
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var size = 0.0;
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while ((currentSymbol & 0x1) === currentBit) {
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size += 1.0;
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currentSymbol >>= 1;
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}
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currentBit = currentSymbol & 0x1;
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if (!PDF417CodewordDecoder.RATIOS_TABLE[i]) {
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PDF417CodewordDecoder.RATIOS_TABLE[i] = new Array(PDF417Common_1.default.BARS_IN_MODULE);
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}
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PDF417CodewordDecoder.RATIOS_TABLE[i][PDF417Common_1.default.BARS_IN_MODULE - j - 1] = Math.fround(size / PDF417Common_1.default.MODULES_IN_CODEWORD);
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}
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}
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this.bSymbolTableReady = true;
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};
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PDF417CodewordDecoder.getDecodedValue = function (moduleBitCount) {
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var decodedValue = PDF417CodewordDecoder.getDecodedCodewordValue(PDF417CodewordDecoder.sampleBitCounts(moduleBitCount));
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if (decodedValue !== -1) {
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return decodedValue;
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}
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return PDF417CodewordDecoder.getClosestDecodedValue(moduleBitCount);
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};
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PDF417CodewordDecoder.sampleBitCounts = function (moduleBitCount) {
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var bitCountSum = MathUtils_1.default.sum(moduleBitCount);
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var result = new Int32Array(PDF417Common_1.default.BARS_IN_MODULE);
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var bitCountIndex = 0;
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var sumPreviousBits = 0;
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for ( /*int*/var i = 0; i < PDF417Common_1.default.MODULES_IN_CODEWORD; i++) {
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var sampleIndex = bitCountSum / (2 * PDF417Common_1.default.MODULES_IN_CODEWORD) +
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(i * bitCountSum) / PDF417Common_1.default.MODULES_IN_CODEWORD;
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if (sumPreviousBits + moduleBitCount[bitCountIndex] <= sampleIndex) {
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sumPreviousBits += moduleBitCount[bitCountIndex];
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bitCountIndex++;
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}
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result[bitCountIndex]++;
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}
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return result;
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};
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PDF417CodewordDecoder.getDecodedCodewordValue = function (moduleBitCount) {
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var decodedValue = PDF417CodewordDecoder.getBitValue(moduleBitCount);
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return PDF417Common_1.default.getCodeword(decodedValue) === -1 ? -1 : decodedValue;
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};
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PDF417CodewordDecoder.getBitValue = function (moduleBitCount) {
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var result = /*long*/ 0;
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for (var /*int*/ i = 0; i < moduleBitCount.length; i++) {
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for ( /*int*/var bit = 0; bit < moduleBitCount[i]; bit++) {
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result = (result << 1) | (i % 2 === 0 ? 1 : 0);
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}
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}
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return Math.trunc(result);
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};
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// working with 32bit float (as in Java)
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PDF417CodewordDecoder.getClosestDecodedValue = function (moduleBitCount) {
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var bitCountSum = MathUtils_1.default.sum(moduleBitCount);
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var bitCountRatios = new Array(PDF417Common_1.default.BARS_IN_MODULE);
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if (bitCountSum > 1) {
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for (var /*int*/ i = 0; i < bitCountRatios.length; i++) {
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bitCountRatios[i] = Math.fround(moduleBitCount[i] / bitCountSum);
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}
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}
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var bestMatchError = Float_1.default.MAX_VALUE;
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var bestMatch = -1;
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if (!this.bSymbolTableReady) {
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PDF417CodewordDecoder.initialize();
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}
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for ( /*int*/var j = 0; j < PDF417CodewordDecoder.RATIOS_TABLE.length; j++) {
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var error = 0.0;
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var ratioTableRow = PDF417CodewordDecoder.RATIOS_TABLE[j];
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for ( /*int*/var k = 0; k < PDF417Common_1.default.BARS_IN_MODULE; k++) {
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var diff = Math.fround(ratioTableRow[k] - bitCountRatios[k]);
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error += Math.fround(diff * diff);
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if (error >= bestMatchError) {
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break;
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}
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}
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if (error < bestMatchError) {
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bestMatchError = error;
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bestMatch = PDF417Common_1.default.SYMBOL_TABLE[j];
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}
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}
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return bestMatch;
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};
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// flag that the table is ready for use
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PDF417CodewordDecoder.bSymbolTableReady = false;
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PDF417CodewordDecoder.RATIOS_TABLE = new Array(PDF417Common_1.default.SYMBOL_TABLE.length).map(function (x) { return x = new Array(PDF417Common_1.default.BARS_IN_MODULE); });
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return PDF417CodewordDecoder;
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}());
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exports.default = PDF417CodewordDecoder;
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