temp

.gitignore

@@ -0,0 +1,7 @@
+node_modules
+dist
+.DS_Store
+
+
+.env*
+!.env*example

.npmrc

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+//npm.xiongxiao.me/:_authToken=${ME_NPM_TOKEN}
+//registry.npmjs.org/:_authToken=${NPM_TOKEN}

demos/test-convert/.gitignore

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+files/*
+!files/test.pcm

demos/test-convert/index.ts

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+import { encodeWav, decodeWav } from '../../src/wav-converter';
+import fs from 'fs';
+const pcm = fs.readFileSync('./files/test.pcm');
+
+const wav = encodeWav(pcm, {
+  sampleRate: 16000,
+  numChannels: 1,
+  byteRate: 16,
+});
+console.log(wav);
+
+fs.writeFileSync('./files/test.wav', wav);

package.json

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+{
+  "name": "@kevisual/video",
+  "version": "0.0.1",
+  "description": "",
+  "scripts": {
+    "build": "tsup"
+  },
+  "keywords": [],
+  "author": "abearxiong <xiongxiao@xiongxiao.me> (https://www.xiongxiao.me)",
+  "license": "MIT",
+  "packageManager": "pnpm@10.6.2",
+  "type": "module",
+  "devDependencies": {
+    "@types/node": "^22.14.1",
+    "tsup": "^8.4.0",
+    "typescript": "^5.8.3"
+  },
+  "exports": {
+    ".": "./dist/index.mjs"
+  },
+  "publishConfig": {
+    "access": "public"
+  }
+}

readme.md

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+# kevisual videos
+

src/index.ts

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+import { encodeWav, decodeWav } from './wav-converter/index.ts';
+
+export { encodeWav, decodeWav };

src/wav-converter/index.ts

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+type EncodeWavOptions = {
+  numChannels?: number;
+  sampleRate?: number;
+  byteRate?: number;
+};
+
+/**
+ * 编码pcm文件为wav文件
+ * @param rawPCM
+ * @param options
+ * @returns
+ */
+export function encodeWav(rawPCM: Buffer | string, options?: EncodeWavOptions) {
+  if (typeof rawPCM === 'string') {
+    rawPCM = Buffer.from(rawPCM, 'binary');
+  }
+
+  if (!Buffer.isBuffer(rawPCM)) {
+    throw new TypeError('pcm data must be Buffer or string');
+  }
+  const opt = options || {};
+  const sampleRate = opt.sampleRate || 16000;
+  const numChannels = opt.numChannels || 1;
+  const byteRate = opt.byteRate || 16;
+
+  const buf = rawPCM;
+  const header = Buffer.alloc(44);
+
+  header.write('RIFF', 0);
+  header.writeUInt32LE(buf.length, 4);
+  header.write('WAVE', 8);
+  header.write('fmt ', 12);
+  header.writeUInt8(16, 16);
+  header.writeUInt8(1, 20);
+  header.writeUInt8(numChannels, 22);
+  header.writeUInt32LE(sampleRate, 24);
+  header.writeUInt32LE(byteRate, 28);
+  header.writeUInt8(4, 32);
+  header.writeUInt8(16, 34);
+  header.write('data', 36);
+  header.writeUInt32LE(buf.length + 44 - 8, 40);
+
+  return Buffer.concat([header, buf]);
+}
+
+/**
+ * 解码wav文件
+ * @param rawWav
+ * @returns
+ */
+export function decodeWav(rawWav: Buffer | string) {
+  if (typeof rawWav === 'string') {
+    rawWav = Buffer.from(rawWav, 'binary');
+  }
+
+  if (!Buffer.isBuffer(rawWav)) {
+    throw new TypeError('pcm data must be Buffer or string');
+  }
+
+  // remove the header of pcm format
+  rawWav = rawWav.subarray(44);
+
+  return rawWav;
+}
+
+export const converter = {
+  encodeWav,
+  decodeWav,
+};

tsconfig.json

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+
+{
+  "compilerOptions": {
+    "module": "NodeNext",
+    "target": "esnext",
+    "noImplicitAny": false,
+    "outDir": "./dist",
+    "sourceMap": false,
+    "allowJs": true,
+    "newLine": "LF",
+    "baseUrl": "./",
+    "typeRoots": [
+      "node_modules/@types",
+    ],
+    "declaration": false,
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "moduleResolution": "NodeNext",
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "esModuleInterop": true,
+    "paths": {
+      "@/*": [
+        "src/*"
+      ],
+    }
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules",
+  ]
+}

tsup.config.ts

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+import { defineConfig } from 'tsup';
+// import glob from 'fast-glob';
+// const services = glob.sync('src/services/*.ts');
+
+const entrys = ['src/index.ts'];
+
+export default defineConfig({
+  entry: entrys,
+  outExtension: ({ format }) => ({
+    js: format === 'esm' ? '.mjs' : '.js',
+  }),
+  splitting: false,
+  sourcemap: false,
+  clean: true,
+  format: 'esm',
+  external: ['dotenv'],
+  dts: true,
+  outDir: 'dist',
+  tsconfig: 'tsconfig.json',
+});