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How to use decodeHuffman method in wpt

Best JavaScript code snippet using wpt

jpegDecodeScan.ts

Source:jpegDecodeScan.ts

...40        }41        bitsCount = 7;42        return bitsData >>> 7;43    }44    function decodeHuffman(tree: any) {45        let node = tree;46        let bit;47        while ((bit = readBit()) !== null) {48            node = node[bit];49            if (typeof node === "number") return node;50            if (typeof node !== "object") {51                throw new Error("invalid huffman sequence");52            }53        }54        return null;55    }56    function receive(length: any): number | undefined {57        let n = 0;58        while (length > 0) {59            let bit = readBit();60            if (bit === null) {61                return;62            }63            n = (n << 1) | bit;64            length--;65        }66        return n;67    }68    function receiveAndExtend(length: any) {69        let n = receive(length) || 0;70        if (n >= 1 << (length - 1)) return n;71        return n + (-1 << length) + 1;72    }73    function decodeBaseline(component: any, zz: any) {74        let t = decodeHuffman(component.huffmanTableDC);75        let diff = t === 0 ? 0 : receiveAndExtend(t);76        zz[0] = component.pred += diff;77        let k = 1;78        while (k < 64) {79            let rs = decodeHuffman(component.huffmanTableAC) || 0;80            let s = rs & 15;81            let r = rs >> 4;82            if (s === 0) {83                if (r < 15) break;84                k += 16;85                continue;86            }87            k += r;88            let z = dctZigZag[k];89            zz[z] = receiveAndExtend(s);90            k++;91        }92    }93    function decodeDCFirst(component: any, zz: any) {94        let t = decodeHuffman(component.huffmanTableDC);95        let diff = t === 0 ? 0 : receiveAndExtend(t) << successive;96        zz[0] = component.pred += diff;97    }98    function decodeDCSuccessive(component: any, zz: any) {99        zz[0] |= readBit() << successive;100    }101    let eobrun = 0;102    function decodeACFirst(component: any, zz: any) {103        if (eobrun > 0) {104            eobrun--;105            return;106        }107        let k = spectralStart,108            e = spectralEnd;109        while (k <= e) {110            let rs = decodeHuffman(component.huffmanTableAC) || 0;111            let s = rs & 15,112                r = rs >> 4;113            if (s === 0) {114                if (r < 15) {115                    eobrun = (receive(r) || 0) + (1 << r) - 1;116                    break;117                }118                k += 16;119                continue;120            }121            k += r;122            let z = dctZigZag[k];123            zz[z] = receiveAndExtend(s) * (1 << successive);124            k++;125        }126    }127    let successiveACState = 0;128    let successiveACNextValue: any;129    function decodeACSuccessive(component: any, zz: any) {130        let k = spectralStart;131        let e = spectralEnd;132        let r = 0;133        while (k <= e) {134            let z = dctZigZag[k];135            let direction = zz[z] < 0 ? -1 : 1;136            switch (successiveACState) {137                case 0: // initial state138                    let rs = decodeHuffman(component.huffmanTableAC) || 0;139                    let s = rs & 15;140                    r = rs >> 4;141                    if (s === 0) {142                        if (r < 15) {143                            eobrun = (receive(r) || 0) + (1 << r);144                            successiveACState = 4;145                        } else {146                            r = 16;147                            successiveACState = 1;148                        }149                    } else {150                        if (s !== 1) throw new Error("invalid ACn encoding");151                        successiveACNextValue = receiveAndExtend(s);152                        successiveACState = r ? 2 : 3;...

compression.ts

Source:compression.ts

...4  [0, 1, 2].includes(it);5const SCI0: Record<0 | 1 | 2, (bytes: Uint8Array) => Uint8Array> = {6  0: (bytes) => bytes,7  1: (bytes) => decodeLzw(bytes, { literalWidth: 8, order: 'lsb' }),8  2: (bytes) => decodeHuffman(bytes),9};10const SCI01: Record<0 | 1 | 2, (bytes: Uint8Array) => Uint8Array> = {11  0: (bytes) => bytes,12  1: (bytes) => decodeHuffman(bytes),13  2: () => {14    throw new Error('unsupported');15  },16};17export const decompress = (18  mode: 'sci0' | 'sci01',19  method: number,20  bytes: Uint8Array,21): Uint8Array => {22  switch (mode) {23    case 'sci0': {24      if (!isSupported(method))25        throw new Error(`unsupported compression algorithm: ${method}`);26      return SCI0[method](bytes);...

decodeHuffman.test.ts

Source:decodeHuffman.test.ts

...5  const tree = buildHuffmanTree( codeLengths );6  const data = new Uint8Array( [ 0x71, 0xe1, 0x04 ] ); // 2, 1, 3, 5, 5, 6, 07  const headBox: [ number ] = [ 0 ];8  it( 'decodes a huffman code', () => {9    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 2 );10    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 1 );11    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 3 );12    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 5 );13    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 5 );14    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 6 );15    expect( decodeHuffman( data, headBox, codeLengths, tree ) ).toBe( 0 );16  } );...

Using AI Code Generation

1var wpt = require('wpt');2var fs = require('fs');3var input = fs.readFileSync('input.txt').toString();4var output = fs.readFileSync('output.txt').toString();5var result = wpt.decodeHuffman(input);6console.log(result);7if(result == output){8	console.log("Test Passed");9}10else{11	console.log("Test Failed");12}

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var path = require('path');4var huffmanCode = fs.readFileSync(path.join(__dirname, 'huffmanCode.txt'), 'utf8');5var decodedText = wptools.decodeHuffman(huffmanCode);6console.log(decodedText);

Using AI Code Generation

1var wptools = require('wp-tools');2var fs = require('fs');3var data = fs.readFileSync('huffman.txt', 'utf8');4console.log(wptools.decodeHuffman(data));5var wptools = require('wp-tools');6var fs = require('fs');7var data = fs.readFileSync('huffman.txt', 'utf8');8console.log(wptools.decodeHuffman(data));

Using AI Code Generation

1const wptHuffman = require('./wpt-huffman');2const fs = require('fs');3const file = fs.readFileSync('./wpt-huffman.js', 'utf-8');4const huffman = new wptHuffman(file);5const compressed = huffman.compress();6const decompressed = huffman.decompress(compressed);7console.log(decompressed);8const wptHuffman = require('./wpt-huffman');9const fs = require('fs');10const file = fs.readFileSync('./wpt-huffman.js', 'utf-8');11const huffman = new wptHuffman(file);12const encoded = huffman.encode(file);13const decoded = huffman.decode(encoded);14console.log(decoded);15const wptHuffman = require('./wpt-huffman');16const fs = require('fs');17const file = fs.readFileSync('./wpt-huffman.js', 'utf-8');18const huffman = new wptHuffman(file);19const encoded = huffman.encode(file, ['a', 'b', 'c', 'd']);20const decoded = huffman.decode(encoded, ['a', 'b', 'c', 'd']);21console.log(decoded);22const wptHuffman = require('./wpt-huffman');23const fs = require('fs');24const file = fs.readFileSync('./wpt-huffman.js', 'utf-8');25const huffman = new wptHuffman(file);26const encoded = huffman.encode(file, ['a', 'b', 'c', 'd'], 'e');27const decoded = huffman.decode(encoded, ['a', 'b', 'c', 'd'], 'e');28console.log(decoded);29[MIT](LICENSE)

Using AI Code Generation

1var fs = require('fs');2var wpt = require('./wpt.js');3var input = fs.readFileSync('./test.txt');4var output = fs.readFileSync('./test.bin');5var tree = fs.readFileSync('./test.tree');6var result = wpt.decodeHuffman(input, output, tree);7console.log(result);8var fs = require('fs');9var wpt = require('./wpt.js');10var input = fs.readFileSync('./test.txt');11var result = wpt.compressHuffman(input);12console.log(result);13var fs = require('fs');14var wpt = require('./wpt.js');15var input = fs.readFileSync('./test.bin');16var tree = fs.readFileSync('./test.tree');17var result = wpt.decompressHuffman(input, tree);18console.log(result);19var fs = require('fs');20var wpt = require('./wpt.js');21var input = fs.readFileSync('./test.txt');22var result = wpt.compressLZW(input);23console.log(result);24var fs = require('fs');25var wpt = require('./wpt.js');26var input = fs.readFileSync('./test.bin');27var result = wpt.decompressLZW(input);28console.log(result);29var fs = require('fs');30var wpt = require('./wpt.js');31var input = fs.readFileSync('./test.txt');32var result = wpt.compressLZW(input);33console.log(result);34var fs = require('fs');35var wpt = require('./wpt.js');36var input = fs.readFileSync('./test.bin');37var result = wpt.decompressLZW(input);38console.log(result);

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