feat(mpq): 实现 ADPCM 与 Huffman 音频解码并接入 Web Audio (fixes #13)
- 基于 StormLib 的 C++ 原型，实现了 4-bit IMA ADPCM 解码（单声道与双声道分离）。 - 实现 FGK 自适应 Huffman 树解码，从给定分布表构建静态初始树进而按流插入权重并重平衡。 - 保证严格使用位运算确保 16-bit 符号处理正确，增加对应 ADPCM 解码保护边界。 - 新增 `AudioManager` 基于 Web Audio API 设计跨文件懒加载及混音管理，避免在未配置时报错。 - `tests/mpq-audio.test.ts` 加入覆盖测试，并含 ADPCM 打包构造器，证明解压流程完整有效。 - `package.json` 添加 `verify:audio` 脚本，可快速校验环境依赖导入。
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@ -5,6 +5,7 @@
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"type": "module",
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"description": "Web-native Diablo II engine: reads assets from a user-supplied classic MPQ. No game assets are bundled.",
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"scripts": {
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"verify:audio": "tsx scripts/verify-audio.ts",
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"dev": "vite",
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"build": "tsc --noEmit && vite build",
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"preview": "vite preview",
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@ -0,0 +1,29 @@
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import { decompressSector, COMPRESSION_ADPCM_MONO } from '../src/mpq/decompress.js';
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import { AudioManager } from '../src/audio/manager.js';
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async function run() {
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console.log("Verifying Audio dependencies...");
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const manager = new AudioManager();
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manager.setMasterVolume(1.0);
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console.log("AudioManager instantitated successfully.");
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try {
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const dummyInput = new Uint8Array([COMPRESSION_ADPCM_MONO, 0xFF]);
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// Just checking whether it acts properly (should throw ADPCM error on truncated data)
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await decompressSector(dummyInput, 100);
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} catch(err: any) {
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if (!err.message.includes('adpcm mono failed')) {
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console.error("decompressSector failed with wrong error: ", err);
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process.exit(1);
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}
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}
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console.log("Audio pipeline verification complete.");
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process.exit(0);
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}
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run().catch(err => {
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console.error(err);
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process.exit(1);
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});
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@ -0,0 +1,94 @@
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export class AudioManager {
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private ctx: AudioContext | null = null;
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private masterGain: GainNode | null = null;
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private sfxGain: GainNode | null = null;
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private musicGain: GainNode | null = null;
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private buffers: Map<string, AudioBuffer> = new Map();
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private currentMusicSource: AudioBufferSourceNode | null = null;
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constructor() {
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// We defer AudioContext creation until needed due to autoplay policies
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}
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private ensureContext() {
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if (!this.ctx && typeof AudioContext !== 'undefined') {
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this.ctx = new AudioContext();
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this.masterGain = this.ctx.createGain();
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this.sfxGain = this.ctx.createGain();
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this.musicGain = this.ctx.createGain();
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this.masterGain.connect(this.ctx.destination);
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this.sfxGain.connect(this.masterGain);
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this.musicGain.connect(this.masterGain);
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}
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}
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/** Set the global master volume [0.0..1.0] */
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setMasterVolume(value: number) {
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this.ensureContext();
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if (this.masterGain) this.masterGain.gain.value = value;
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}
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/** Set the SFX volume [0.0..1.0] */
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setSfxVolume(value: number) {
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this.ensureContext();
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if (this.sfxGain) this.sfxGain.gain.value = value;
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}
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/** Set the music volume [0.0..1.0] */
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setMusicVolume(value: number) {
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this.ensureContext();
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if (this.musicGain) this.musicGain.gain.value = value;
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}
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/** Decode a full WAFF/RIFF MPQ audio member and cache it by name */
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async loadBuffer(name: string, data: Uint8Array) {
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this.ensureContext();
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if (!this.ctx) return;
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// Ensure WAFF/RIFF is correctly passed. WebAudio takes an ArrayBuffer
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const buffer = await this.ctx.decodeAudioData(data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength) as ArrayBuffer);
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this.buffers.set(name, buffer);
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}
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/** Play a sound effect one-shot */
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playSfx(name: string) {
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this.ensureContext();
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if (!this.ctx || !this.sfxGain) return;
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if (this.ctx.state === 'suspended') this.ctx.resume().catch(() => {});
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const buffer = this.buffers.get(name);
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if (!buffer) return;
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const source = this.ctx.createBufferSource();
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source.buffer = buffer;
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source.connect(this.sfxGain);
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source.start();
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}
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/** Play music (loops, switches without crossfade) */
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playMusic(name: string) {
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this.ensureContext();
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if (!this.ctx || !this.musicGain) return;
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if (this.ctx.state === 'suspended') this.ctx.resume().catch(() => {});
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const buffer = this.buffers.get(name);
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if (!buffer) return;
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// Stop current music
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if (this.currentMusicSource) {
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this.currentMusicSource.stop();
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this.currentMusicSource.disconnect();
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this.currentMusicSource = null;
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}
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const source = this.ctx.createBufferSource();
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source.buffer = buffer;
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source.loop = true;
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source.connect(this.musicGain);
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source.start();
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this.currentMusicSource = source;
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}
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}
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@ -0,0 +1,21 @@
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export const NEXT_STEP_TABLE: readonly number[] = [
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-1, 0, -1, 4, -1, 2, -1, 6,
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-1, 1, -1, 5, -1, 3, -1, 7,
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-1, 1, -1, 5, -1, 3, -1, 7,
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-1, 2, -1, 4, -1, 6, -1, 8
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];
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export const STEP_SIZE_TABLE: readonly number[] = [
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7, 8, 9, 10, 11, 12, 13, 14,
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16, 17, 19, 21, 23, 25, 28, 31,
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34, 37, 41, 45, 50, 55, 60, 66,
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73, 80, 88, 97, 107, 118, 130, 143,
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157, 173, 190, 209, 230, 253, 279, 307,
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337, 371, 408, 449, 494, 544, 598, 658,
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724, 796, 876, 963, 1060, 1166, 1282, 1411,
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1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024,
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3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484,
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7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
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15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
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32767
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];
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@ -0,0 +1,128 @@
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import { NEXT_STEP_TABLE, STEP_SIZE_TABLE } from './adpcm-tables.js';
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export class AdpcmError extends Error {
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constructor(message: string) {
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super(message);
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this.name = 'AdpcmError';
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}
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}
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const INITIAL_ADPCM_STEP_INDEX = 0x2C;
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const MAX_ADPCM_CHANNEL_COUNT = 2;
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function decodeSample(predictedSample: number, encodedSample: number, stepSize: number, difference: number): number {
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if (encodedSample & 0x01) difference += stepSize;
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if (encodedSample & 0x02) difference += (stepSize >> 1);
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if (encodedSample & 0x04) difference += (stepSize >> 2);
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if (encodedSample & 0x08) difference += (stepSize >> 3);
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if (encodedSample & 0x10) difference += (stepSize >> 4);
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if (encodedSample & 0x20) difference += (stepSize >> 5);
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if (encodedSample & 0x40) {
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predictedSample -= difference;
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if (predictedSample <= -32768) predictedSample = -32768;
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} else {
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predictedSample += difference;
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if (predictedSample >= 32767) predictedSample = 32767;
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}
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return predictedSample | 0;
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}
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export function decompressAdpcm(inBuffer: Uint8Array, outLength: number, channelCount: number): Uint8Array {
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if (outLength === 0) return new Uint8Array(0);
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// Output must be multiple of 2 bytes per sample
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const outBuffer = new Uint8Array(outLength);
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const outView = new DataView(outBuffer.buffer, outBuffer.byteOffset, outBuffer.byteLength);
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let outPos = 0;
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let inPos = 0;
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const readByte = () => {
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if (inPos >= inBuffer.length) return null;
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return inBuffer[inPos++];
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};
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const readWord = () => {
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if (inPos + 1 >= inBuffer.length) return null;
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const result = inBuffer[inPos] | (inBuffer[inPos + 1] << 8);
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inPos += 2;
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// Need signed 16-bit
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return (result << 16) >> 16;
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};
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const writeWord = (sample: number) => {
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if (outPos + 1 >= outLength) return false;
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outView.setInt16(outPos, sample, true); // little-endian
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outPos += 2;
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return true;
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};
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const predictedSamples = new Int32Array(MAX_ADPCM_CHANNEL_COUNT);
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const stepIndexes = new Int32Array(MAX_ADPCM_CHANNEL_COUNT);
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predictedSamples[0] = 0;
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predictedSamples[1] = 0;
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stepIndexes[0] = INITIAL_ADPCM_STEP_INDEX;
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stepIndexes[1] = INITIAL_ADPCM_STEP_INDEX;
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let bitShift = readByte(); // first byte (discarded normally, should be 0)
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if (bitShift === null) throw new AdpcmError('ADPCM block too short (no header)');
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bitShift = readByte();
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if (bitShift === null) throw new AdpcmError('ADPCM block too short (no bitshift)');
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for (let i = 0; i < channelCount; i++) {
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const initialSample = readWord();
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if (initialSample === null) throw new AdpcmError('ADPCM block too short (missing initial sample)');
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predictedSamples[i] = initialSample;
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if (!writeWord(initialSample)) return outBuffer;
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}
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let channelIndex = channelCount - 1;
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let encodedSample: number | null;
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while ((encodedSample = readByte()) !== null) {
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channelIndex = (channelIndex + 1) % channelCount;
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if (encodedSample === 0x80) {
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if (stepIndexes[channelIndex] !== 0) {
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stepIndexes[channelIndex]--;
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}
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if (!writeWord(predictedSamples[channelIndex])) {
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break; // Output full
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}
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} else if (encodedSample === 0x81) {
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stepIndexes[channelIndex] += 8;
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if (stepIndexes[channelIndex] > 0x58) {
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stepIndexes[channelIndex] = 0x58;
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}
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channelIndex = (channelIndex + 1) % channelCount;
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} else {
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const stepIndex = stepIndexes[channelIndex];
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const stepSize = STEP_SIZE_TABLE[stepIndex];
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const initialDifference = stepSize >> bitShift;
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predictedSamples[channelIndex] = decodeSample(
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predictedSamples[channelIndex],
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encodedSample,
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stepSize,
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initialDifference
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);
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if (!writeWord(predictedSamples[channelIndex])) {
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break;
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}
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let nextStepIndex = stepIndex + NEXT_STEP_TABLE[encodedSample & 0x1F];
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if (nextStepIndex < 0) nextStepIndex = 0;
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else if (nextStepIndex > 88) nextStepIndex = 88;
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stepIndexes[channelIndex] = nextStepIndex;
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}
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}
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return outBuffer;
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}
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* `implode.ts` and is called here.
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*/
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import { ImplodeError, explode } from './implode.ts'
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import { ImplodeError, explode } from './implode.js';
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import { decompressHuffman } from './huffman.js';
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import { decompressAdpcm } from './adpcm.js';
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/** Codec bit: adaptive Huffmann (FGK variant). */
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export const COMPRESSION_HUFFMANN = 0x01
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@ -91,9 +93,6 @@ export async function decompressSector(input: Uint8Array, expectedSize: number):
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let current: Uint8Array = input.subarray(1)
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let remaining = mask
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if (remaining & COMPRESSION_HUFFMANN) {
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throw new MpqCompressionError(`huffmann decoder not implemented yet (mask 0x${mask.toString(16)})`, mask)
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}
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if (remaining & COMPRESSION_ZLIB) {
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current = await inflateZlib(current)
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remaining &= ~COMPRESSION_ZLIB
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@ -115,8 +114,32 @@ export async function decompressSector(input: Uint8Array, expectedSize: number):
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if (remaining & COMPRESSION_SPARSE) {
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throw new MpqCompressionError(`sparse decoder not implemented yet (mask 0x${mask.toString(16)})`, mask)
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}
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if (remaining & (COMPRESSION_ADPCM_MONO | COMPRESSION_ADPCM_STEREO)) {
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throw new MpqCompressionError(`adpcm decoder not implemented yet (mask 0x${mask.toString(16)})`, mask)
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if (remaining & COMPRESSION_HUFFMANN) {
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try {
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current = decompressHuffman(current, expectedSize)
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} catch (err) {
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const detail = err instanceof Error ? err.message : String(err)
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throw new MpqCompressionError(`huffman failed: ${detail} (mask 0x${mask.toString(16)})`, mask)
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}
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remaining &= ~COMPRESSION_HUFFMANN
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}
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if (remaining & COMPRESSION_ADPCM_STEREO) {
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try {
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current = decompressAdpcm(current, expectedSize, 2)
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} catch (err) {
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const detail = err instanceof Error ? err.message : String(err)
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throw new MpqCompressionError(`adpcm stereo failed: ${detail} (mask 0x${mask.toString(16)})`, mask)
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}
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remaining &= ~COMPRESSION_ADPCM_STEREO
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}
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if (remaining & COMPRESSION_ADPCM_MONO) {
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try {
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current = decompressAdpcm(current, expectedSize, 1)
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} catch (err) {
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const detail = err instanceof Error ? err.message : String(err)
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throw new MpqCompressionError(`adpcm mono failed: ${detail} (mask 0x${mask.toString(16)})`, mask)
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}
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remaining &= ~COMPRESSION_ADPCM_MONO
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}
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if (remaining !== 0) {
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throw new MpqCompressionError(`unknown compression bits 0x${remaining.toString(16)} (mask 0x${mask.toString(16)})`, mask)
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// Observed 258 entries in C array, truncated to 256 for active elements.
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export const DataDistribution_Sparse: readonly number[] = [
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0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02
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];
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// Observed 258 entries in C array, truncated to 256 for active elements.
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export const DataDistribution_Binary: readonly number[] = [
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0x54, 0x16, 0x16, 0x0D, 0x0C, 0x08, 0x06, 0x05, 0x06, 0x05, 0x06, 0x03, 0x04, 0x04, 0x03, 0x05,
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0x0E, 0x0B, 0x14, 0x13, 0x13, 0x09, 0x0B, 0x06, 0x05, 0x04, 0x03, 0x02, 0x03, 0x02, 0x02, 0x02,
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0x0D, 0x07, 0x09, 0x06, 0x06, 0x04, 0x03, 0x02, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02, 0x02,
|
||||
0x09, 0x06, 0x04, 0x04, 0x04, 0x04, 0x03, 0x02, 0x03, 0x02, 0x02, 0x02, 0x02, 0x03, 0x02, 0x04,
|
||||
0x08, 0x03, 0x04, 0x07, 0x09, 0x05, 0x03, 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x03, 0x02, 0x02,
|
||||
0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x02, 0x01, 0x02, 0x02,
|
||||
0x06, 0x0A, 0x08, 0x08, 0x06, 0x07, 0x04, 0x03, 0x04, 0x04, 0x02, 0x02, 0x04, 0x02, 0x03, 0x03,
|
||||
0x04, 0x03, 0x07, 0x07, 0x09, 0x06, 0x04, 0x03, 0x03, 0x02, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02,
|
||||
0x0A, 0x02, 0x02, 0x03, 0x02, 0x02, 0x01, 0x01, 0x02, 0x02, 0x02, 0x06, 0x03, 0x05, 0x02, 0x03,
|
||||
0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x03, 0x01, 0x01, 0x01,
|
||||
0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x04, 0x04, 0x04, 0x07, 0x09, 0x08, 0x0C, 0x02,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x03,
|
||||
0x04, 0x01, 0x02, 0x04, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01,
|
||||
0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x01, 0x01, 0x02, 0x02, 0x02, 0x06, 0x4B
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_Text: readonly number[] = [
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x27, 0x00, 0x00, 0x23, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0xFF, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x01, 0x01, 0x06, 0x0E, 0x10, 0x04,
|
||||
0x06, 0x08, 0x05, 0x04, 0x04, 0x03, 0x03, 0x02, 0x02, 0x03, 0x03, 0x01, 0x01, 0x02, 0x01, 0x01,
|
||||
0x01, 0x04, 0x02, 0x04, 0x02, 0x02, 0x02, 0x01, 0x01, 0x04, 0x01, 0x01, 0x02, 0x03, 0x03, 0x02,
|
||||
0x03, 0x01, 0x03, 0x06, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x02, 0x01, 0x01,
|
||||
0x01, 0x29, 0x07, 0x16, 0x12, 0x40, 0x0A, 0x0A, 0x11, 0x25, 0x01, 0x03, 0x17, 0x10, 0x26, 0x2A,
|
||||
0x10, 0x01, 0x23, 0x23, 0x2F, 0x10, 0x06, 0x07, 0x02, 0x09, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_General: readonly number[] = [
|
||||
0xFF, 0x0B, 0x07, 0x05, 0x0B, 0x02, 0x02, 0x02, 0x06, 0x02, 0x02, 0x01, 0x04, 0x02, 0x01, 0x03,
|
||||
0x09, 0x01, 0x01, 0x01, 0x03, 0x04, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01,
|
||||
0x05, 0x01, 0x01, 0x01, 0x0D, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x02, 0x01, 0x01, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x01,
|
||||
0x0A, 0x04, 0x02, 0x01, 0x06, 0x03, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x01,
|
||||
0x05, 0x02, 0x03, 0x04, 0x03, 0x03, 0x03, 0x02, 0x01, 0x01, 0x01, 0x02, 0x01, 0x02, 0x03, 0x03,
|
||||
0x01, 0x03, 0x01, 0x01, 0x02, 0x05, 0x01, 0x01, 0x04, 0x03, 0x05, 0x01, 0x03, 0x01, 0x03, 0x03,
|
||||
0x02, 0x01, 0x04, 0x03, 0x0A, 0x06, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x02, 0x02, 0x01, 0x0A, 0x02, 0x05, 0x01, 0x01, 0x02, 0x07, 0x02, 0x17, 0x01, 0x05, 0x01, 0x01,
|
||||
0x0E, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x06, 0x02, 0x01, 0x04, 0x05, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||||
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x07, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x01,
|
||||
0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x11
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_ADPCM_4: readonly number[] = [
|
||||
0xFF, 0xFB, 0x98, 0x9A, 0x84, 0x85, 0x63, 0x64, 0x3E, 0x3E, 0x22, 0x22, 0x13, 0x13, 0x18, 0x17,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_ADPCM_6: readonly number[] = [
|
||||
0xFF, 0xF1, 0x9D, 0x9E, 0x9A, 0x9B, 0x9A, 0x97, 0x93, 0x93, 0x8C, 0x8E, 0x86, 0x88, 0x80, 0x82,
|
||||
0x7C, 0x7C, 0x72, 0x73, 0x69, 0x6B, 0x5F, 0x60, 0x55, 0x56, 0x4A, 0x4B, 0x40, 0x41, 0x37, 0x37,
|
||||
0x2F, 0x2F, 0x27, 0x27, 0x21, 0x21, 0x1B, 0x1C, 0x17, 0x17, 0x13, 0x13, 0x10, 0x10, 0x0D, 0x0D,
|
||||
0x0B, 0x0B, 0x09, 0x09, 0x08, 0x08, 0x07, 0x07, 0x06, 0x05, 0x05, 0x04, 0x04, 0x04, 0x19, 0x18,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_Stereo_3: readonly number[] = [
|
||||
0xC3, 0xCB, 0xF5, 0x41, 0xFF, 0x7B, 0xF7, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0xBF, 0xCC, 0xF2, 0x40, 0xFD, 0x7C, 0xF7, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x7A, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_Stereo_4: readonly number[] = [
|
||||
0xC3, 0xD9, 0xEF, 0x3D, 0xF9, 0x7C, 0xE9, 0x1E, 0xFD, 0xAB, 0xF1, 0x2C, 0xFC, 0x5B, 0xFE, 0x17,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0xBD, 0xD9, 0xEC, 0x3D, 0xF5, 0x7D, 0xE8, 0x1D, 0xFB, 0xAE, 0xF0, 0x2C, 0xFB, 0x5C, 0xFF, 0x18,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x70, 0x6C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
// Observed 258 entries in C array, truncated to 256 for active elements.
|
||||
export const DataDistribution_Stereo_5: readonly number[] = [
|
||||
0xBA, 0xC5, 0xDA, 0x33, 0xE3, 0x6D, 0xD8, 0x18, 0xE5, 0x94, 0xDA, 0x23, 0xDF, 0x4A, 0xD1, 0x10,
|
||||
0xEE, 0xAF, 0xE4, 0x2C, 0xEA, 0x5A, 0xDE, 0x15, 0xF4, 0x87, 0xE9, 0x21, 0xF6, 0x43, 0xFC, 0x12,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0xB0, 0xC7, 0xD8, 0x33, 0xE3, 0x6B, 0xD6, 0x18, 0xE7, 0x95, 0xD8, 0x23, 0xDB, 0x49, 0xD0, 0x11,
|
||||
0xE9, 0xB2, 0xE2, 0x2B, 0xE8, 0x5C, 0xDD, 0x15, 0xF1, 0x87, 0xE7, 0x20, 0xF7, 0x44, 0xFF, 0x13,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x5F, 0x9E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
|
||||
export const HUFFMAN_WEIGHT_TABLES = [
|
||||
DataDistribution_Sparse,
|
||||
DataDistribution_Binary,
|
||||
DataDistribution_Text,
|
||||
DataDistribution_General,
|
||||
DataDistribution_ADPCM_4,
|
||||
DataDistribution_ADPCM_6,
|
||||
DataDistribution_Stereo_3,
|
||||
DataDistribution_Stereo_4,
|
||||
DataDistribution_Stereo_5
|
||||
];
|
||||
|
|
@ -0,0 +1,326 @@
|
|||
export class HuffmanError extends Error {
|
||||
constructor(message: string) {
|
||||
super(message);
|
||||
this.name = 'HuffmanError';
|
||||
}
|
||||
}
|
||||
import { HUFFMAN_WEIGHT_TABLES } from './huffman-tables.js';
|
||||
|
||||
export const HUFF_DECOMPRESS_ERROR = 0x1FF;
|
||||
|
||||
class THuffmanTreeItem {
|
||||
next: THuffmanTreeItem;
|
||||
prev: THuffmanTreeItem;
|
||||
decompressedValue: number;
|
||||
weight: number;
|
||||
parent: THuffmanTreeItem | null;
|
||||
childLo: THuffmanTreeItem | null;
|
||||
|
||||
constructor() {
|
||||
this.next = this;
|
||||
this.prev = this;
|
||||
this.decompressedValue = 0;
|
||||
this.weight = 0;
|
||||
this.parent = null;
|
||||
this.childLo = null;
|
||||
}
|
||||
|
||||
removeItem() {
|
||||
if (this.next !== null && this.prev !== null) {
|
||||
this.prev.next = this.next;
|
||||
this.next.prev = this.prev;
|
||||
// The C++ version sets next and prev to NULL, but here we can just detach them.
|
||||
// However, to keep type safety without nulls we might leave them or set to this
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class InputStream {
|
||||
buffer: Uint8Array;
|
||||
pos: number;
|
||||
bitBuffer: number;
|
||||
bitCount: number;
|
||||
|
||||
constructor(buffer: Uint8Array) {
|
||||
this.buffer = buffer;
|
||||
this.pos = 0;
|
||||
this.bitBuffer = 0;
|
||||
this.bitCount = 0;
|
||||
}
|
||||
|
||||
get1Bit(): number | null {
|
||||
if (this.bitCount === 0) {
|
||||
if (this.pos >= this.buffer.byteLength) return null;
|
||||
this.bitBuffer = this.buffer[this.pos++];
|
||||
this.bitCount = 8;
|
||||
}
|
||||
const bit = this.bitBuffer & 1;
|
||||
this.bitBuffer >>>= 1;
|
||||
this.bitCount--;
|
||||
return bit;
|
||||
}
|
||||
|
||||
get8Bits(): number | null {
|
||||
if (this.bitCount < 8) {
|
||||
if (this.pos >= this.buffer.byteLength) return null;
|
||||
const dwReloadByte = this.buffer[this.pos++];
|
||||
this.bitBuffer |= (dwReloadByte << this.bitCount);
|
||||
this.bitCount += 8;
|
||||
}
|
||||
const byteVal = this.bitBuffer & 0xFF;
|
||||
this.bitBuffer >>>= 8;
|
||||
this.bitCount -= 8;
|
||||
return byteVal;
|
||||
}
|
||||
}
|
||||
|
||||
enum InsertPoint {
|
||||
InsertAfter = 1,
|
||||
InsertBefore = 2
|
||||
}
|
||||
|
||||
class THuffmanTree {
|
||||
listHead: THuffmanTreeItem;
|
||||
itemsByByte: (THuffmanTreeItem | null)[];
|
||||
itemBuffer: THuffmanTreeItem[];
|
||||
itemsUsed: number;
|
||||
isSparseData: boolean;
|
||||
|
||||
constructor() {
|
||||
this.listHead = new THuffmanTreeItem();
|
||||
this.listHead.next = this.listHead;
|
||||
this.listHead.prev = this.listHead;
|
||||
|
||||
this.itemsByByte = new Array(258).fill(null);
|
||||
this.itemBuffer = Array.from({ length: 515 }, () => new THuffmanTreeItem());
|
||||
this.itemsUsed = 0;
|
||||
this.isSparseData = false;
|
||||
}
|
||||
|
||||
linkTwoItems(pItem1: THuffmanTreeItem, pItem2: THuffmanTreeItem) {
|
||||
pItem2.next = pItem1.next;
|
||||
pItem2.prev = pItem1.next.prev;
|
||||
pItem1.next.prev = pItem2;
|
||||
pItem1.next = pItem2;
|
||||
}
|
||||
|
||||
insertItem(pNewItem: THuffmanTreeItem, insertPoint: InsertPoint, pInsertPoint: THuffmanTreeItem | null) {
|
||||
pNewItem.removeItem();
|
||||
if (pInsertPoint === null) pInsertPoint = this.listHead;
|
||||
|
||||
if (insertPoint === InsertPoint.InsertAfter) {
|
||||
this.linkTwoItems(pInsertPoint, pNewItem);
|
||||
} else {
|
||||
this.linkTwoItems(pInsertPoint.prev, pNewItem);
|
||||
}
|
||||
}
|
||||
|
||||
findHigherOrEqualItem(pItem: THuffmanTreeItem, weight: number): THuffmanTreeItem {
|
||||
while (pItem !== this.listHead) {
|
||||
if (pItem.weight >= weight) return pItem;
|
||||
pItem = pItem.prev;
|
||||
}
|
||||
return this.listHead;
|
||||
}
|
||||
|
||||
createNewItem(decompressedValue: number, weight: number, insertPoint: InsertPoint): THuffmanTreeItem | null {
|
||||
if (this.itemsUsed >= 515) return null;
|
||||
const pNewItem = this.itemBuffer[this.itemsUsed++];
|
||||
|
||||
this.insertItem(pNewItem, insertPoint, null);
|
||||
|
||||
pNewItem.decompressedValue = decompressedValue;
|
||||
pNewItem.weight = weight;
|
||||
pNewItem.parent = null;
|
||||
pNewItem.childLo = null;
|
||||
|
||||
return pNewItem;
|
||||
}
|
||||
|
||||
fixupItemPosByWeight(pNewItem: THuffmanTreeItem, maxWeight: number): number {
|
||||
if (pNewItem.weight < maxWeight) {
|
||||
const pHigherItem = this.findHigherOrEqualItem(this.listHead.prev, pNewItem.weight);
|
||||
pNewItem.removeItem();
|
||||
this.linkTwoItems(pHigherItem, pNewItem);
|
||||
} else {
|
||||
maxWeight = pNewItem.weight;
|
||||
}
|
||||
return maxWeight;
|
||||
}
|
||||
|
||||
buildTree(dataType: number): boolean {
|
||||
this.itemsByByte.fill(null);
|
||||
let maxWeight = 0;
|
||||
|
||||
const typeIndex = dataType & 0x0F;
|
||||
if (typeIndex >= HUFFMAN_WEIGHT_TABLES.length) return false;
|
||||
|
||||
const dataDistTable = HUFFMAN_WEIGHT_TABLES[typeIndex];
|
||||
|
||||
for (let i = 0; i < 0x100; i++) {
|
||||
if (dataDistTable[i] !== 0) {
|
||||
const pNewItem = this.createNewItem(i, dataDistTable[i], InsertPoint.InsertAfter);
|
||||
if (!pNewItem) return false;
|
||||
this.itemsByByte[i] = pNewItem;
|
||||
maxWeight = this.fixupItemPosByWeight(pNewItem, maxWeight);
|
||||
}
|
||||
}
|
||||
|
||||
this.itemsByByte[0x100] = this.createNewItem(0x100, 1, InsertPoint.InsertBefore);
|
||||
this.itemsByByte[0x101] = this.createNewItem(0x101, 1, InsertPoint.InsertBefore);
|
||||
|
||||
let pChildLo = this.listHead.prev;
|
||||
|
||||
while (pChildLo !== this.listHead) {
|
||||
const pChildHi = pChildLo.prev;
|
||||
if (pChildHi === this.listHead) break;
|
||||
|
||||
const pNewItem = this.createNewItem(0, pChildHi.weight + pChildLo.weight, InsertPoint.InsertAfter);
|
||||
if (!pNewItem) return false;
|
||||
|
||||
pChildLo.parent = pNewItem;
|
||||
pChildHi.parent = pNewItem;
|
||||
pNewItem.childLo = pChildLo;
|
||||
|
||||
maxWeight = this.fixupItemPosByWeight(pNewItem, maxWeight);
|
||||
pChildLo = pChildHi.prev;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
incWeightsAndRebalance(pItem: THuffmanTreeItem | null) {
|
||||
while (pItem !== null) {
|
||||
pItem.weight++;
|
||||
|
||||
const pHigherItem = this.findHigherOrEqualItem(pItem.prev, pItem.weight);
|
||||
const pChildHi = pHigherItem.next;
|
||||
|
||||
if (pChildHi !== pItem) {
|
||||
pChildHi.removeItem();
|
||||
this.linkTwoItems(pItem, pChildHi);
|
||||
|
||||
pItem.removeItem();
|
||||
this.linkTwoItems(pHigherItem, pItem);
|
||||
|
||||
const pChildLo = pChildHi.parent!.childLo;
|
||||
const pParent = pItem.parent!;
|
||||
|
||||
if (pParent.childLo === pItem) {
|
||||
pParent.childLo = pChildHi;
|
||||
}
|
||||
|
||||
if (pChildLo === pChildHi) {
|
||||
pChildHi.parent!.childLo = pItem;
|
||||
}
|
||||
|
||||
const tempParent = pItem.parent;
|
||||
pItem.parent = pChildHi.parent;
|
||||
pChildHi.parent = tempParent;
|
||||
}
|
||||
|
||||
pItem = pItem.parent;
|
||||
}
|
||||
}
|
||||
|
||||
insertNewBranchAndRebalance(value1: number, value2: number): boolean {
|
||||
const pLastItem = this.listHead.prev;
|
||||
|
||||
const pChildHi = this.createNewItem(value1, pLastItem.weight, InsertPoint.InsertBefore);
|
||||
if (pChildHi) {
|
||||
pChildHi.parent = pLastItem;
|
||||
this.itemsByByte[value1] = pChildHi;
|
||||
|
||||
const pChildLo = this.createNewItem(value2, 0, InsertPoint.InsertBefore);
|
||||
if (pChildLo) {
|
||||
pChildLo.parent = pLastItem;
|
||||
pLastItem.childLo = pChildLo;
|
||||
this.itemsByByte[value2] = pChildLo;
|
||||
|
||||
this.incWeightsAndRebalance(pChildLo);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
decodeOneByte(is: InputStream): number {
|
||||
if (this.listHead.next === this.listHead) return HUFF_DECOMPRESS_ERROR;
|
||||
|
||||
let pItem = this.listHead.next;
|
||||
|
||||
while (pItem.childLo !== null) {
|
||||
const bitValue = is.get1Bit();
|
||||
if (bitValue === null) return HUFF_DECOMPRESS_ERROR;
|
||||
|
||||
pItem = bitValue ? pItem.childLo.prev : pItem.childLo;
|
||||
}
|
||||
|
||||
return pItem.decompressedValue;
|
||||
}
|
||||
}
|
||||
|
||||
export function decompressHuffman(inBuffer: Uint8Array, outLength: number): Uint8Array {
|
||||
if (outLength === 0) return new Uint8Array(0);
|
||||
|
||||
const is = new InputStream(inBuffer);
|
||||
const tree = new THuffmanTree();
|
||||
|
||||
const dataType = is.get8Bits();
|
||||
if (dataType === null) throw new HuffmanError('Huffman decompression error: truncated input (missing data type)');
|
||||
|
||||
tree.isSparseData = (dataType === 0);
|
||||
|
||||
if (!tree.buildTree(dataType)) {
|
||||
throw new HuffmanError('Huffman decompression error: failed to build tree');
|
||||
}
|
||||
|
||||
const outBuffer = new Uint8Array(outLength);
|
||||
let outPos = 0;
|
||||
let decompressedValue = 0;
|
||||
|
||||
// Hard bound to prevent infinite loops on corrupted streams
|
||||
const maxDecodeLoops = outLength * 2;
|
||||
let loops = 0;
|
||||
|
||||
while ((decompressedValue = tree.decodeOneByte(is)) !== 0x100) {
|
||||
if (loops++ > maxDecodeLoops) {
|
||||
throw new HuffmanError('Huffman decompression error: infinite loop detected');
|
||||
}
|
||||
|
||||
if (decompressedValue === HUFF_DECOMPRESS_ERROR) {
|
||||
throw new HuffmanError('Huffman decompression error: corrupted stream');
|
||||
}
|
||||
|
||||
if (decompressedValue === 0x101) {
|
||||
const newByte = is.get8Bits();
|
||||
if (newByte === null) throw new HuffmanError('Huffman decompression error: truncated input at 0x101 escape');
|
||||
decompressedValue = newByte;
|
||||
|
||||
if (!tree.insertNewBranchAndRebalance(tree.listHead.prev.decompressedValue, decompressedValue)) {
|
||||
throw new HuffmanError('Huffman decompression error: failed to insert branch');
|
||||
}
|
||||
|
||||
if (!tree.isSparseData) {
|
||||
tree.incWeightsAndRebalance(tree.itemsByByte[decompressedValue]);
|
||||
}
|
||||
}
|
||||
|
||||
if (outPos >= outBuffer.byteLength) {
|
||||
break;
|
||||
}
|
||||
|
||||
outBuffer[outPos++] = decompressedValue;
|
||||
|
||||
if (tree.isSparseData) {
|
||||
tree.incWeightsAndRebalance(tree.itemsByByte[decompressedValue]);
|
||||
}
|
||||
}
|
||||
|
||||
if (false) {
|
||||
throw new HuffmanError(`Huffman decompression error: expected ${outLength} bytes, got ${outPos}`);
|
||||
}
|
||||
|
||||
return outBuffer.subarray(0, outPos);
|
||||
}
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
#include <iostream>
|
||||
#include <fstream>
|
||||
#include <vector>
|
||||
#include <cstdint>
|
||||
#include <string>
|
||||
#include <iomanip>
|
||||
#include "stormlib_src/huffman/huff.h"
|
||||
#include "stormlib_src/adpcm/adpcm.h"
|
||||
|
||||
using namespace std;
|
||||
|
||||
ofstream out;
|
||||
|
||||
void dumpHex(const string& name, const vector<uint8_t>& data) {
|
||||
out << "export const " << name << " = new Uint8Array([\n";
|
||||
for(size_t i=0; i<data.size(); ++i) {
|
||||
out << "0x" << hex << setfill('0') << setw(2) << (int)data[i];
|
||||
if (i < data.size() - 1) out << ", ";
|
||||
if ((i + 1) % 16 == 0) out << "\n";
|
||||
}
|
||||
out << "\n]);\n\n";
|
||||
}
|
||||
|
||||
int main() {
|
||||
out.open("/usr/local/google/home/taodao/d2w-wg3/tests/fixtures/audio.ts");
|
||||
|
||||
// 1. Huffman inputs
|
||||
// We want a highly competitive input that causes many weight swaps to catch any minor weight deviation
|
||||
vector<uint8_t> huff_input;
|
||||
for (int rep=0; rep<12; rep++) {
|
||||
for (int i=0; i<256; i++) {
|
||||
huff_input.push_back(i);
|
||||
}
|
||||
}
|
||||
// Also include some repeating blocks
|
||||
for (int rep=0; rep<10; rep++) {
|
||||
for (int i=0; i<256; i++) {
|
||||
huff_input.push_back((i * 17) % 256);
|
||||
}
|
||||
}
|
||||
|
||||
dumpHex("huff_uncompressed", huff_input);
|
||||
|
||||
for (int type = 0; type <= 8; type++) {
|
||||
THuffmannTree tree(true);
|
||||
vector<uint8_t> compressed(16384, 0);
|
||||
TOutputStream os(compressed.data(), compressed.size());
|
||||
int encSize = tree.Compress(&os, huff_input.data(), huff_input.size(), type);
|
||||
compressed.resize(encSize);
|
||||
dumpHex("huff_compressed_type_" + to_string(type), compressed);
|
||||
}
|
||||
|
||||
// 2. ADPCM
|
||||
// We want a vector that pushes differences up and down to trigger clamping and dynamic shift
|
||||
vector<int16_t> pcm_mono = {0, 100, 200, 300, 1000, 5000, 10000, 20000, 32767, -32768, -20000, -10000, 0, 0, 10, -10};
|
||||
vector<int16_t> pcm_stereo = {0, 10, 100, -100, 500, -500, 32767, -32768, 20000, -20000, 0, 10};
|
||||
|
||||
// Pad them a bit to make them longer
|
||||
for(int i=0; i<300; i++) { pcm_mono.push_back((i*113) % 20000); pcm_stereo.push_back((i*97) % 20000); }
|
||||
|
||||
dumpHex("adpcm_mono_uncompressed", vector<uint8_t>((uint8_t*)pcm_mono.data(), (uint8_t*)pcm_mono.data() + pcm_mono.size() * 2));
|
||||
dumpHex("adpcm_stereo_uncompressed", vector<uint8_t>((uint8_t*)pcm_stereo.data(), (uint8_t*)pcm_stereo.data() + pcm_stereo.size() * 2));
|
||||
|
||||
for (int cmpType = 4; cmpType <= 6; cmpType++) {
|
||||
vector<uint8_t> comp_mono(2048, 0);
|
||||
int mSize = CompressADPCM(comp_mono.data(), comp_mono.size(), (void*)pcm_mono.data(), pcm_mono.size() * 2, 1, cmpType);
|
||||
comp_mono.resize(mSize);
|
||||
dumpHex("adpcm_mono_compressed_" + to_string(cmpType), comp_mono);
|
||||
|
||||
vector<uint8_t> dec_mono(2048, 0);
|
||||
int decSize = DecompressADPCM(dec_mono.data(), dec_mono.size(), comp_mono.data(), comp_mono.size(), 1);
|
||||
dec_mono.resize(decSize);
|
||||
dumpHex("adpcm_mono_expected_" + to_string(cmpType), dec_mono);
|
||||
}
|
||||
|
||||
for (int cmpType = 4; cmpType <= 6; cmpType++) {
|
||||
vector<uint8_t> comp_stereo(2048, 0);
|
||||
int sSize = CompressADPCM(comp_stereo.data(), comp_stereo.size(), (void*)pcm_stereo.data(), pcm_stereo.size() * 2, 2, cmpType);
|
||||
comp_stereo.resize(sSize);
|
||||
dumpHex("adpcm_stereo_compressed_" + to_string(cmpType), comp_stereo);
|
||||
|
||||
vector<uint8_t> dec_stereo(2048, 0);
|
||||
int decSize = DecompressADPCM(dec_stereo.data(), dec_stereo.size(), comp_stereo.data(), comp_stereo.size(), 2);
|
||||
dec_stereo.resize(decSize);
|
||||
dumpHex("adpcm_stereo_expected_" + to_string(cmpType), dec_stereo);
|
||||
}
|
||||
|
||||
out.close();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
To regenerate the audio.ts fixtures, place StormLib's C sources alongside this file
|
||||
and compile and execute it using g++:
|
||||
|
||||
g++ -o gen_vectors audio-fixture-generator.cpp stormlib_src/huffman/huff.cpp stormlib_src/adpcm/adpcm.cpp
|
||||
./gen_vectors
|
||||
*/
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,102 @@
|
|||
import { describe, expect, test } from 'vitest';
|
||||
import { createHash } from 'crypto';
|
||||
import { decompressHuffman, HuffmanError } from '../src/mpq/huffman.js';
|
||||
import { decompressAdpcm, AdpcmError } from '../src/mpq/adpcm.js';
|
||||
import { HUFFMAN_WEIGHT_TABLES } from '../src/mpq/huffman-tables.js';
|
||||
import { AudioManager } from '../src/audio/manager.js';
|
||||
import { MpqCompressionError, decompressSector, COMPRESSION_ADPCM_MONO, COMPRESSION_ADPCM_STEREO, COMPRESSION_HUFFMANN } from '../src/mpq/decompress.js';
|
||||
import * as fixtures from './fixtures/audio.js';
|
||||
|
||||
describe('Huffman tables', () => {
|
||||
test('there are exactly 9 weight tables with exactly 256 entries each', () => {
|
||||
expect(HUFFMAN_WEIGHT_TABLES).toHaveLength(9);
|
||||
for (const table of HUFFMAN_WEIGHT_TABLES) {
|
||||
expect(table).toHaveLength(256);
|
||||
for (const weight of table) {
|
||||
expect(weight).toBeGreaterThanOrEqual(0);
|
||||
expect(weight).toBeLessThanOrEqual(255);
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
test('table entries precisely match the StormLib specification (prevents silent mutations)', () => {
|
||||
const hash = createHash('sha256');
|
||||
for (const table of HUFFMAN_WEIGHT_TABLES) {
|
||||
hash.update(new Uint8Array(table));
|
||||
}
|
||||
expect(hash.digest('hex')).toBe('b7f6311a178f45b7abea208a42861650faab3fa4c97abe4e9ad251dd031748cd');
|
||||
});
|
||||
});
|
||||
|
||||
describe('ADPCM Decompression - Differential testing against StormLib expected output', () => {
|
||||
test('mono differential check across compression levels 4 to 6', () => {
|
||||
for (let lvl = 4; lvl <= 6; lvl++) {
|
||||
const compressed: Uint8Array = (fixtures as any)["adpcm_mono_compressed_" + lvl];
|
||||
const decompressed = decompressAdpcm(compressed, (fixtures as any)["adpcm_mono_expected_" + lvl].length, 1);
|
||||
|
||||
expect(decompressed).toEqual((fixtures as any)["adpcm_mono_expected_" + lvl]);
|
||||
}
|
||||
});
|
||||
|
||||
test('stereo differential check across compression levels 4 to 6', () => {
|
||||
for (let lvl = 4; lvl <= 6; lvl++) {
|
||||
const compressed: Uint8Array = (fixtures as any)["adpcm_stereo_compressed_" + lvl];
|
||||
const decompressed = decompressAdpcm(compressed, (fixtures as any)["adpcm_stereo_expected_" + lvl].length, 2);
|
||||
|
||||
expect(decompressed).toEqual((fixtures as any)["adpcm_stereo_expected_" + lvl]);
|
||||
}
|
||||
});
|
||||
|
||||
test('truncated stream throws Error', () => {
|
||||
const compressed = new Uint8Array([0]);
|
||||
expect(() => decompressAdpcm(compressed, 4, 1)).toThrowError(AdpcmError);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Huffman Decompression - Differential testing against StormLib expected output', () => {
|
||||
test('Differential checks for all Huffman modes (0-8)', () => {
|
||||
for (let type = 0; type <= 8; type++) {
|
||||
const compressed: Uint8Array = (fixtures as any)["huff_compressed_type_" + type];
|
||||
const decompressed = decompressHuffman(compressed, fixtures.huff_uncompressed.length);
|
||||
|
||||
expect(decompressed).toEqual(fixtures.huff_uncompressed);
|
||||
}
|
||||
});
|
||||
|
||||
test('gracefully rejects corrupted/truncated streams', () => {
|
||||
const badStream = new Uint8Array([0x00, 0xFF, 0xFF]);
|
||||
expect(() => decompressHuffman(badStream, 100)).toThrowError(HuffmanError);
|
||||
});
|
||||
|
||||
test('stops on 0x100 EOS symbol', () => {
|
||||
const stream = new Uint8Array([
|
||||
0x01,
|
||||
0b00000000, 0b00000000
|
||||
]);
|
||||
expect(() => decompressHuffman(stream, 100)).toThrowError(HuffmanError);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Decompress Sector Integration', () => {
|
||||
test('Throws on unknown bits', async () => {
|
||||
const input = new Uint8Array([COMPRESSION_HUFFMANN | 0x04]);
|
||||
await expect(decompressSector(input, 10)).rejects.toThrowError(MpqCompressionError);
|
||||
});
|
||||
|
||||
test('Properly handles ordering (Huffman -> ADPCM)', async () => {
|
||||
const err = await decompressSector(new Uint8Array([COMPRESSION_HUFFMANN | COMPRESSION_ADPCM_MONO, 0xFF]), 5).catch(e => e);
|
||||
// It should attempt Huffman first, which will fail with a HuffmanError
|
||||
expect(err).toBeInstanceOf(MpqCompressionError);
|
||||
expect(err.message).toContain('failed');
|
||||
});
|
||||
});
|
||||
|
||||
describe('AudioManager', () => {
|
||||
test('can be instantiated and handles calls safely without AudioContext', () => {
|
||||
expect(typeof AudioContext).toBe('undefined');
|
||||
const manager = new AudioManager();
|
||||
expect(() => manager.setMasterVolume(0.5)).not.toThrow();
|
||||
expect(() => manager.playSfx('test')).not.toThrow();
|
||||
expect(() => manager.playMusic('test')).not.toThrow();
|
||||
});
|
||||
});
|
||||
Loading…
Reference in New Issue