Add self-bundle

Author: dy

package.json

@@ -30,7 +30,8 @@
   "scripts": {
     "test": "node test.js",
     "test:all": "npm test --workspaces && npm test",
-    "publish:all": "npm publish --workspaces && npm publish"
+    "publish:all": "npm publish --workspaces && npm publish",
+    "build": "npm run build --workspaces --if-present"
   },
   "repository": {
     "type": "git",
@@ -69,6 +70,7 @@
     "audio-buffer": "^7.3.0",
     "audio-decode": "^4.0.0",
     "audio-lena": "^3.0.0",
+    "esbuild": "^0.28.0",
     "tst": "^9.2.2"
   }
 }

packages/encode-flac/package.json

@@ -39,10 +39,10 @@
     "node": ">=16"
   },
   "bugs": "https://github.com/audiojs/audio-encode/issues",
-  "scripts": {
-    "test": "node test.js"
-  },
   "dependencies": {
     "libflacjs": "^5.4.0"
+  },
+  "scripts": {
+    "test": "node test.js"
   }
 }

packages/encode-mp3/build.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+cd "$(dirname "$0")"
+npx esbuild src/mp3-encode.src.js --bundle --format=esm --outfile=mp3-encode.js --platform=browser

packages/encode-mp3/mp3-encode.js

@@ -40,7 +40,9 @@
   },
   "bugs": "https://github.com/audiojs/audio-encode/issues",
   "scripts": {
-    "test": "node test.js"
+    "test": "node test.js",
+    "build": "bash build.sh",
+    "prepack": "npm run build"
   },
   "dependencies": {
     "wasm-media-encoders": "^0.7.0"

packages/encode-mp3/package.json

@@ -0,0 +1,65 @@
+// requires: wasm-media-encoders
+import { createMp3Encoder } from 'wasm-media-encoders'
+
+/**
+ * MP3 encoder — browser + Node, via wasm-media-encoders
+ *
+ * @param {Object} opts
+ * @param {number} opts.sampleRate - required
+ * @param {number} [opts.bitrate=128] - kbps (CBR)
+ * @param {number} [opts.quality] - 0-9 VBR quality (0=best, 9=worst). If set, uses VBR mode.
+ * @param {number} [opts.channels] - 1 or 2
+ * @returns {{ encode, flush, free }}
+ *
+ * encode(channels: Float32Array[]) → Uint8Array
+ * flush() → Uint8Array
+ * free() → void
+ */
+export default async function mp3(opts) {
+	let { sampleRate, bitrate = 128, quality, channels } = opts
+	if (!channels || channels < 1 || channels > 2) channels = 2
+
+	let encoder = await createMp3Encoder()
+
+	let cfg = { sampleRate, channels }
+	if (quality != null) cfg.vbrQuality = quality
+	else cfg.bitrate = bitrate
+
+	encoder.configure(cfg)
+
+	// WASM encoder has ~320MB/channel buffer limit.
+	// Chunk large inputs in 1152*1024 (~1.18M) sample blocks.
+	const CHUNK = 1152 * 1024
+
+	return { encode, flush, free }
+
+	function encode(ch) {
+		let n = ch[0].length
+		if (n <= CHUNK) {
+			let raw = encoder.encode(ch)
+			return new Uint8Array(raw)
+		}
+		let parts = []
+		for (let i = 0; i < n; i += CHUNK) {
+			let end = Math.min(i + CHUNK, n)
+			let slice = ch.map(c => c.subarray(i, end))
+			let raw = encoder.encode(slice)
+			if (raw.length) parts.push(new Uint8Array(raw))
+		}
+		let total = 0
+		for (let p of parts) total += p.length
+		let out = new Uint8Array(total)
+		let off = 0
+		for (let p of parts) { out.set(p, off); off += p.length }
+		return out
+	}
+
+	function flush() {
+		let raw = encoder.finalize()
+		return new Uint8Array(raw)
+	}
+
+	function free() {
+		encoder = null
+	}
+}

packages/encode-mp3/src/mp3-encode.src.js

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+cd "$(dirname "$0")"
+npx esbuild src/ogg-encode.src.js --bundle --format=esm --outfile=ogg-encode.js --platform=browser

packages/encode-ogg/build.sh

@@ -38,7 +38,9 @@
   },
   "bugs": "https://github.com/audiojs/audio-encode/issues",
   "scripts": {
-    "test": "node test.js"
+    "test": "node test.js",
+    "build": "bash build.sh",
+    "prepack": "npm run build"
   },
   "dependencies": {
     "wasm-media-encoders": "^0.7.0"

packages/encode-ogg/ogg-encode.js

@@ -0,0 +1,39 @@
+// requires: wasm-media-encoders
+import { createOggEncoder } from 'wasm-media-encoders'
+
+/**
+ * OGG Vorbis encoder — browser + Node (WASM)
+ *
+ * @param {Object} opts
+ * @param {number} opts.sampleRate - required
+ * @param {number} [opts.quality=3] - quality level -1 to 10
+ * @param {number} [opts.channels] - 1 or 2
+ * @returns {Promise<{ encode, flush, free }>}
+ */
+export default async function ogg(opts) {
+	let { sampleRate, quality = 3, channels } = opts
+	let enc = await createOggEncoder()
+	let nch = channels || 0
+
+	if (nch) enc.configure({ sampleRate, channels: nch, vbrQuality: quality })
+
+	return { encode, flush, free }
+
+	function encode(ch) {
+		if (!nch) {
+			nch = ch.length
+			enc.configure({ sampleRate, channels: nch, vbrQuality: quality })
+		}
+		let raw = enc.encode(ch)
+		return new Uint8Array(raw)
+	}
+
+	function flush() {
+		let raw = enc.finalize()
+		return new Uint8Array(raw)
+	}
+
+	function free() {
+		enc = null
+	}
+}