SourceTermAnalysisSystem_vue/node_modules/.vite/deps/jpeg-JHDJFPDY.js
2026-05-15 10:22:44 +08:00

865 lines
24 KiB
JavaScript

import {
BaseDecoder
} from "./chunk-C5KGH6RQ.js";
import "./chunk-LK32TJAX.js";
// node_modules/geotiff/dist-module/compression/jpeg.js
var dctZigZag = new Int32Array([
0,
1,
8,
16,
9,
2,
3,
10,
17,
24,
32,
25,
18,
11,
4,
5,
12,
19,
26,
33,
40,
48,
41,
34,
27,
20,
13,
6,
7,
14,
21,
28,
35,
42,
49,
56,
57,
50,
43,
36,
29,
22,
15,
23,
30,
37,
44,
51,
58,
59,
52,
45,
38,
31,
39,
46,
53,
60,
61,
54,
47,
55,
62,
63
]);
var dctCos1 = 4017;
var dctSin1 = 799;
var dctCos3 = 3406;
var dctSin3 = 2276;
var dctCos6 = 1567;
var dctSin6 = 3784;
var dctSqrt2 = 5793;
var dctSqrt1d2 = 2896;
function buildHuffmanTable(codeLengths, values) {
let k = 0;
const code = [];
let length = 16;
while (length > 0 && !codeLengths[length - 1]) {
--length;
}
code.push({ children: [], index: 0 });
let p = code[0];
let q;
for (let i = 0; i < length; i++) {
for (let j = 0; j < codeLengths[i]; j++) {
p = code.pop();
p.children[p.index] = values[k];
while (p.index > 0) {
p = code.pop();
}
p.index++;
code.push(p);
while (code.length <= i) {
code.push(q = { children: [], index: 0 });
p.children[p.index] = q.children;
p = q;
}
k++;
}
if (i + 1 < length) {
code.push(q = { children: [], index: 0 });
p.children[p.index] = q.children;
p = q;
}
}
return code[0].children;
}
function decodeScan(data, initialOffset, frame, components, resetInterval, spectralStart, spectralEnd, successivePrev, successive) {
const { mcusPerLine, progressive } = frame;
const startOffset = initialOffset;
let offset = initialOffset;
let bitsData = 0;
let bitsCount = 0;
function readBit() {
if (bitsCount > 0) {
bitsCount--;
return bitsData >> bitsCount & 1;
}
bitsData = data[offset++];
if (bitsData === 255) {
const nextByte = data[offset++];
if (nextByte) {
throw new Error(`unexpected marker: ${(bitsData << 8 | nextByte).toString(16)}`);
}
}
bitsCount = 7;
return bitsData >>> 7;
}
function decodeHuffman(tree) {
let node = tree;
let bit;
while ((bit = readBit()) !== null) {
node = node[bit];
if (typeof node === "number") {
return node;
}
if (typeof node !== "object") {
throw new Error("invalid huffman sequence");
}
}
return null;
}
function receive(initialLength) {
let length = initialLength;
let n2 = 0;
while (length > 0) {
const bit = readBit();
if (bit === null) {
return void 0;
}
n2 = n2 << 1 | bit;
--length;
}
return n2;
}
function receiveAndExtend(length) {
const n2 = receive(length);
if (n2 >= 1 << length - 1) {
return n2;
}
return n2 + (-1 << length) + 1;
}
function decodeBaseline(component2, zz) {
const t = decodeHuffman(component2.huffmanTableDC);
const diff = t === 0 ? 0 : receiveAndExtend(t);
component2.pred += diff;
zz[0] = component2.pred;
let k2 = 1;
while (k2 < 64) {
const rs = decodeHuffman(component2.huffmanTableAC);
const s = rs & 15;
const r = rs >> 4;
if (s === 0) {
if (r < 15) {
break;
}
k2 += 16;
} else {
k2 += r;
const z = dctZigZag[k2];
zz[z] = receiveAndExtend(s);
k2++;
}
}
}
function decodeDCFirst(component2, zz) {
const t = decodeHuffman(component2.huffmanTableDC);
const diff = t === 0 ? 0 : receiveAndExtend(t) << successive;
component2.pred += diff;
zz[0] = component2.pred;
}
function decodeDCSuccessive(component2, zz) {
zz[0] |= readBit() << successive;
}
let eobrun = 0;
function decodeACFirst(component2, zz) {
if (eobrun > 0) {
eobrun--;
return;
}
let k2 = spectralStart;
const e = spectralEnd;
while (k2 <= e) {
const rs = decodeHuffman(component2.huffmanTableAC);
const s = rs & 15;
const r = rs >> 4;
if (s === 0) {
if (r < 15) {
eobrun = receive(r) + (1 << r) - 1;
break;
}
k2 += 16;
} else {
k2 += r;
const z = dctZigZag[k2];
zz[z] = receiveAndExtend(s) * (1 << successive);
k2++;
}
}
}
let successiveACState = 0;
let successiveACNextValue;
function decodeACSuccessive(component2, zz) {
let k2 = spectralStart;
const e = spectralEnd;
let r = 0;
while (k2 <= e) {
const z = dctZigZag[k2];
const direction = zz[z] < 0 ? -1 : 1;
switch (successiveACState) {
case 0: {
const rs = decodeHuffman(component2.huffmanTableAC);
const s = rs & 15;
r = rs >> 4;
if (s === 0) {
if (r < 15) {
eobrun = receive(r) + (1 << r);
successiveACState = 4;
} else {
r = 16;
successiveACState = 1;
}
} else {
if (s !== 1) {
throw new Error("invalid ACn encoding");
}
successiveACNextValue = receiveAndExtend(s);
successiveACState = r ? 2 : 3;
}
continue;
}
case 1:
// skipping r zero items
case 2:
if (zz[z]) {
zz[z] += (readBit() << successive) * direction;
} else {
r--;
if (r === 0) {
successiveACState = successiveACState === 2 ? 3 : 0;
}
}
break;
case 3:
if (zz[z]) {
zz[z] += (readBit() << successive) * direction;
} else {
zz[z] = successiveACNextValue << successive;
successiveACState = 0;
}
break;
case 4:
if (zz[z]) {
zz[z] += (readBit() << successive) * direction;
}
break;
default:
break;
}
k2++;
}
if (successiveACState === 4) {
eobrun--;
if (eobrun === 0) {
successiveACState = 0;
}
}
}
function decodeMcu(component2, decodeFunction, mcu2, row, col) {
const mcuRow = mcu2 / mcusPerLine | 0;
const mcuCol = mcu2 % mcusPerLine;
const blockRow = mcuRow * component2.v + row;
const blockCol = mcuCol * component2.h + col;
decodeFunction(component2, component2.blocks[blockRow][blockCol]);
}
function decodeBlock(component2, decodeFunction, mcu2) {
const blockRow = mcu2 / component2.blocksPerLine | 0;
const blockCol = mcu2 % component2.blocksPerLine;
decodeFunction(component2, component2.blocks[blockRow][blockCol]);
}
const componentsLength = components.length;
let component;
let i;
let j;
let k;
let n;
let decodeFn;
if (progressive) {
if (spectralStart === 0) {
decodeFn = successivePrev === 0 ? decodeDCFirst : decodeDCSuccessive;
} else {
decodeFn = successivePrev === 0 ? decodeACFirst : decodeACSuccessive;
}
} else {
decodeFn = decodeBaseline;
}
let mcu = 0;
let marker;
let mcuExpected;
if (componentsLength === 1) {
mcuExpected = components[0].blocksPerLine * components[0].blocksPerColumn;
} else {
mcuExpected = mcusPerLine * frame.mcusPerColumn;
}
const usedResetInterval = resetInterval || mcuExpected;
while (mcu < mcuExpected) {
for (i = 0; i < componentsLength; i++) {
components[i].pred = 0;
}
eobrun = 0;
if (componentsLength === 1) {
component = components[0];
for (n = 0; n < usedResetInterval; n++) {
decodeBlock(component, decodeFn, mcu);
mcu++;
}
} else {
for (n = 0; n < usedResetInterval; n++) {
for (i = 0; i < componentsLength; i++) {
component = components[i];
const { h, v } = component;
for (j = 0; j < v; j++) {
for (k = 0; k < h; k++) {
decodeMcu(component, decodeFn, mcu, j, k);
}
}
}
mcu++;
if (mcu === mcuExpected) {
break;
}
}
}
bitsCount = 0;
marker = data[offset] << 8 | data[offset + 1];
if (marker < 65280) {
throw new Error("marker was not found");
}
if (marker >= 65488 && marker <= 65495) {
offset += 2;
} else {
break;
}
}
return offset - startOffset;
}
function buildComponentData(frame, component) {
const lines = [];
const { blocksPerLine, blocksPerColumn } = component;
const samplesPerLine = blocksPerLine << 3;
const R = new Int32Array(64);
const r = new Uint8Array(64);
function quantizeAndInverse(zz, dataOut, dataIn) {
const qt = component.quantizationTable;
let v0;
let v1;
let v2;
let v3;
let v4;
let v5;
let v6;
let v7;
let t;
const p = dataIn;
let i;
for (i = 0; i < 64; i++) {
p[i] = zz[i] * qt[i];
}
for (i = 0; i < 8; ++i) {
const row = 8 * i;
if (p[1 + row] === 0 && p[2 + row] === 0 && p[3 + row] === 0 && p[4 + row] === 0 && p[5 + row] === 0 && p[6 + row] === 0 && p[7 + row] === 0) {
t = dctSqrt2 * p[0 + row] + 512 >> 10;
p[0 + row] = t;
p[1 + row] = t;
p[2 + row] = t;
p[3 + row] = t;
p[4 + row] = t;
p[5 + row] = t;
p[6 + row] = t;
p[7 + row] = t;
continue;
}
v0 = dctSqrt2 * p[0 + row] + 128 >> 8;
v1 = dctSqrt2 * p[4 + row] + 128 >> 8;
v2 = p[2 + row];
v3 = p[6 + row];
v4 = dctSqrt1d2 * (p[1 + row] - p[7 + row]) + 128 >> 8;
v7 = dctSqrt1d2 * (p[1 + row] + p[7 + row]) + 128 >> 8;
v5 = p[3 + row] << 4;
v6 = p[5 + row] << 4;
t = v0 - v1 + 1 >> 1;
v0 = v0 + v1 + 1 >> 1;
v1 = t;
t = v2 * dctSin6 + v3 * dctCos6 + 128 >> 8;
v2 = v2 * dctCos6 - v3 * dctSin6 + 128 >> 8;
v3 = t;
t = v4 - v6 + 1 >> 1;
v4 = v4 + v6 + 1 >> 1;
v6 = t;
t = v7 + v5 + 1 >> 1;
v5 = v7 - v5 + 1 >> 1;
v7 = t;
t = v0 - v3 + 1 >> 1;
v0 = v0 + v3 + 1 >> 1;
v3 = t;
t = v1 - v2 + 1 >> 1;
v1 = v1 + v2 + 1 >> 1;
v2 = t;
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
v7 = t;
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
v6 = t;
p[0 + row] = v0 + v7;
p[7 + row] = v0 - v7;
p[1 + row] = v1 + v6;
p[6 + row] = v1 - v6;
p[2 + row] = v2 + v5;
p[5 + row] = v2 - v5;
p[3 + row] = v3 + v4;
p[4 + row] = v3 - v4;
}
for (i = 0; i < 8; ++i) {
const col = i;
if (p[1 * 8 + col] === 0 && p[2 * 8 + col] === 0 && p[3 * 8 + col] === 0 && p[4 * 8 + col] === 0 && p[5 * 8 + col] === 0 && p[6 * 8 + col] === 0 && p[7 * 8 + col] === 0) {
t = dctSqrt2 * dataIn[i + 0] + 8192 >> 14;
p[0 * 8 + col] = t;
p[1 * 8 + col] = t;
p[2 * 8 + col] = t;
p[3 * 8 + col] = t;
p[4 * 8 + col] = t;
p[5 * 8 + col] = t;
p[6 * 8 + col] = t;
p[7 * 8 + col] = t;
continue;
}
v0 = dctSqrt2 * p[0 * 8 + col] + 2048 >> 12;
v1 = dctSqrt2 * p[4 * 8 + col] + 2048 >> 12;
v2 = p[2 * 8 + col];
v3 = p[6 * 8 + col];
v4 = dctSqrt1d2 * (p[1 * 8 + col] - p[7 * 8 + col]) + 2048 >> 12;
v7 = dctSqrt1d2 * (p[1 * 8 + col] + p[7 * 8 + col]) + 2048 >> 12;
v5 = p[3 * 8 + col];
v6 = p[5 * 8 + col];
t = v0 - v1 + 1 >> 1;
v0 = v0 + v1 + 1 >> 1;
v1 = t;
t = v2 * dctSin6 + v3 * dctCos6 + 2048 >> 12;
v2 = v2 * dctCos6 - v3 * dctSin6 + 2048 >> 12;
v3 = t;
t = v4 - v6 + 1 >> 1;
v4 = v4 + v6 + 1 >> 1;
v6 = t;
t = v7 + v5 + 1 >> 1;
v5 = v7 - v5 + 1 >> 1;
v7 = t;
t = v0 - v3 + 1 >> 1;
v0 = v0 + v3 + 1 >> 1;
v3 = t;
t = v1 - v2 + 1 >> 1;
v1 = v1 + v2 + 1 >> 1;
v2 = t;
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
v7 = t;
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
v6 = t;
p[0 * 8 + col] = v0 + v7;
p[7 * 8 + col] = v0 - v7;
p[1 * 8 + col] = v1 + v6;
p[6 * 8 + col] = v1 - v6;
p[2 * 8 + col] = v2 + v5;
p[5 * 8 + col] = v2 - v5;
p[3 * 8 + col] = v3 + v4;
p[4 * 8 + col] = v3 - v4;
}
for (i = 0; i < 64; ++i) {
const sample = 128 + (p[i] + 8 >> 4);
if (sample < 0) {
dataOut[i] = 0;
} else if (sample > 255) {
dataOut[i] = 255;
} else {
dataOut[i] = sample;
}
}
}
for (let blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
const scanLine = blockRow << 3;
for (let i = 0; i < 8; i++) {
lines.push(new Uint8Array(samplesPerLine));
}
for (let blockCol = 0; blockCol < blocksPerLine; blockCol++) {
quantizeAndInverse(component.blocks[blockRow][blockCol], r, R);
let offset = 0;
const sample = blockCol << 3;
for (let j = 0; j < 8; j++) {
const line = lines[scanLine + j];
for (let i = 0; i < 8; i++) {
line[sample + i] = r[offset++];
}
}
}
}
return lines;
}
var JpegStreamReader = class {
constructor() {
this.jfif = null;
this.adobe = null;
this.quantizationTables = [];
this.huffmanTablesAC = [];
this.huffmanTablesDC = [];
this.resetFrames();
}
resetFrames() {
this.frames = [];
}
parse(data) {
let offset = 0;
function readUint16() {
const value = data[offset] << 8 | data[offset + 1];
offset += 2;
return value;
}
function readDataBlock() {
const length = readUint16();
const array = data.subarray(offset, offset + length - 2);
offset += array.length;
return array;
}
function prepareComponents(frame) {
let maxH = 0;
let maxV = 0;
let component;
let componentId;
for (componentId in frame.components) {
if (frame.components.hasOwnProperty(componentId)) {
component = frame.components[componentId];
if (maxH < component.h) {
maxH = component.h;
}
if (maxV < component.v) {
maxV = component.v;
}
}
}
const mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / maxH);
const mcusPerColumn = Math.ceil(frame.scanLines / 8 / maxV);
for (componentId in frame.components) {
if (frame.components.hasOwnProperty(componentId)) {
component = frame.components[componentId];
const blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) * component.h / maxH);
const blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines / 8) * component.v / maxV);
const blocksPerLineForMcu = mcusPerLine * component.h;
const blocksPerColumnForMcu = mcusPerColumn * component.v;
const blocks = [];
for (let i = 0; i < blocksPerColumnForMcu; i++) {
const row = [];
for (let j = 0; j < blocksPerLineForMcu; j++) {
row.push(new Int32Array(64));
}
blocks.push(row);
}
component.blocksPerLine = blocksPerLine;
component.blocksPerColumn = blocksPerColumn;
component.blocks = blocks;
}
}
frame.maxH = maxH;
frame.maxV = maxV;
frame.mcusPerLine = mcusPerLine;
frame.mcusPerColumn = mcusPerColumn;
}
let fileMarker = readUint16();
if (fileMarker !== 65496) {
throw new Error("SOI not found");
}
fileMarker = readUint16();
while (fileMarker !== 65497) {
switch (fileMarker) {
case 65280:
break;
case 65504:
// APP0 (Application Specific)
case 65505:
// APP1
case 65506:
// APP2
case 65507:
// APP3
case 65508:
// APP4
case 65509:
// APP5
case 65510:
// APP6
case 65511:
// APP7
case 65512:
// APP8
case 65513:
// APP9
case 65514:
// APP10
case 65515:
// APP11
case 65516:
// APP12
case 65517:
// APP13
case 65518:
// APP14
case 65519:
// APP15
case 65534: {
const appData = readDataBlock();
if (fileMarker === 65504) {
if (appData[0] === 74 && appData[1] === 70 && appData[2] === 73 && appData[3] === 70 && appData[4] === 0) {
this.jfif = {
version: { major: appData[5], minor: appData[6] },
densityUnits: appData[7],
xDensity: appData[8] << 8 | appData[9],
yDensity: appData[10] << 8 | appData[11],
thumbWidth: appData[12],
thumbHeight: appData[13],
thumbData: appData.subarray(14, 14 + 3 * appData[12] * appData[13])
};
}
}
if (fileMarker === 65518) {
if (appData[0] === 65 && appData[1] === 100 && appData[2] === 111 && appData[3] === 98 && appData[4] === 101 && appData[5] === 0) {
this.adobe = {
version: appData[6],
flags0: appData[7] << 8 | appData[8],
flags1: appData[9] << 8 | appData[10],
transformCode: appData[11]
};
}
}
break;
}
case 65499: {
const quantizationTablesLength = readUint16();
const quantizationTablesEnd = quantizationTablesLength + offset - 2;
while (offset < quantizationTablesEnd) {
const quantizationTableSpec = data[offset++];
const tableData = new Int32Array(64);
if (quantizationTableSpec >> 4 === 0) {
for (let j = 0; j < 64; j++) {
const z = dctZigZag[j];
tableData[z] = data[offset++];
}
} else if (quantizationTableSpec >> 4 === 1) {
for (let j = 0; j < 64; j++) {
const z = dctZigZag[j];
tableData[z] = readUint16();
}
} else {
throw new Error("DQT: invalid table spec");
}
this.quantizationTables[quantizationTableSpec & 15] = tableData;
}
break;
}
case 65472:
// SOF0 (Start of Frame, Baseline DCT)
case 65473:
// SOF1 (Start of Frame, Extended DCT)
case 65474: {
readUint16();
const frame = {
extended: fileMarker === 65473,
progressive: fileMarker === 65474,
precision: data[offset++],
scanLines: readUint16(),
samplesPerLine: readUint16(),
components: {},
componentsOrder: []
};
const componentsCount = data[offset++];
let componentId;
for (let i = 0; i < componentsCount; i++) {
componentId = data[offset];
const h = data[offset + 1] >> 4;
const v = data[offset + 1] & 15;
const qId = data[offset + 2];
frame.componentsOrder.push(componentId);
frame.components[componentId] = {
h,
v,
quantizationIdx: qId
};
offset += 3;
}
prepareComponents(frame);
this.frames.push(frame);
break;
}
case 65476: {
const huffmanLength = readUint16();
for (let i = 2; i < huffmanLength; ) {
const huffmanTableSpec = data[offset++];
const codeLengths = new Uint8Array(16);
let codeLengthSum = 0;
for (let j = 0; j < 16; j++, offset++) {
codeLengths[j] = data[offset];
codeLengthSum += codeLengths[j];
}
const huffmanValues = new Uint8Array(codeLengthSum);
for (let j = 0; j < codeLengthSum; j++, offset++) {
huffmanValues[j] = data[offset];
}
i += 17 + codeLengthSum;
if (huffmanTableSpec >> 4 === 0) {
this.huffmanTablesDC[huffmanTableSpec & 15] = buildHuffmanTable(
codeLengths,
huffmanValues
);
} else {
this.huffmanTablesAC[huffmanTableSpec & 15] = buildHuffmanTable(
codeLengths,
huffmanValues
);
}
}
break;
}
case 65501:
readUint16();
this.resetInterval = readUint16();
break;
case 65498: {
readUint16();
const selectorsCount = data[offset++];
const components = [];
const frame = this.frames[0];
for (let i = 0; i < selectorsCount; i++) {
const component = frame.components[data[offset++]];
const tableSpec = data[offset++];
component.huffmanTableDC = this.huffmanTablesDC[tableSpec >> 4];
component.huffmanTableAC = this.huffmanTablesAC[tableSpec & 15];
components.push(component);
}
const spectralStart = data[offset++];
const spectralEnd = data[offset++];
const successiveApproximation = data[offset++];
const processed = decodeScan(
data,
offset,
frame,
components,
this.resetInterval,
spectralStart,
spectralEnd,
successiveApproximation >> 4,
successiveApproximation & 15
);
offset += processed;
break;
}
case 65535:
if (data[offset] !== 255) {
offset--;
}
break;
default:
if (data[offset - 3] === 255 && data[offset - 2] >= 192 && data[offset - 2] <= 254) {
offset -= 3;
break;
}
throw new Error(`unknown JPEG marker ${fileMarker.toString(16)}`);
}
fileMarker = readUint16();
}
}
getResult() {
const { frames } = this;
if (this.frames.length === 0) {
throw new Error("no frames were decoded");
} else if (this.frames.length > 1) {
console.warn("more than one frame is not supported");
}
for (let i = 0; i < this.frames.length; i++) {
const cp = this.frames[i].components;
for (const j of Object.keys(cp)) {
cp[j].quantizationTable = this.quantizationTables[cp[j].quantizationIdx];
delete cp[j].quantizationIdx;
}
}
const frame = frames[0];
const { components, componentsOrder } = frame;
const outComponents = [];
const width = frame.samplesPerLine;
const height = frame.scanLines;
for (let i = 0; i < componentsOrder.length; i++) {
const component = components[componentsOrder[i]];
outComponents.push({
lines: buildComponentData(frame, component),
scaleX: component.h / frame.maxH,
scaleY: component.v / frame.maxV
});
}
const out = new Uint8Array(width * height * outComponents.length);
let oi = 0;
for (let y = 0; y < height; ++y) {
for (let x = 0; x < width; ++x) {
for (let i = 0; i < outComponents.length; ++i) {
const component = outComponents[i];
out[oi] = component.lines[0 | y * component.scaleY][0 | x * component.scaleX];
++oi;
}
}
}
return out;
}
};
var JpegDecoder = class extends BaseDecoder {
constructor(fileDirectory) {
super();
this.reader = new JpegStreamReader();
if (fileDirectory.JPEGTables) {
this.reader.parse(fileDirectory.JPEGTables);
}
}
decodeBlock(buffer) {
this.reader.resetFrames();
this.reader.parse(new Uint8Array(buffer));
return this.reader.getResult().buffer;
}
};
export {
JpegDecoder as default
};
//# sourceMappingURL=jpeg-JHDJFPDY.js.map