@audio/decode-ac3
Decode AC-3 (Dolby Digital) to PCM float samples.
liba52 compiled to a single-file WASM ES module — no side files, loads from any CDN, Node, workers and AudioWorklets.
import decode, { decoder } from '@audio/decode-ac3'
let { channelData, sampleRate } = await decode(ac3Bytes)
let dec = await decoder()
let head = dec.decode(chunk1) // synchronous; partial frames carry over
let tail = dec.flush()
dec.free()Input is a raw AC-3 frame stream (.ac3, or the frames a container demuxer extracts — @audio/decode-mp4, @audio/decode-webm and @audio/decode-avi route their AC-3 tracks here). The stream's own layout is kept, up to 5.1; channels come out in WAV order: FL, FR, FC, LFE, BL, BR (surround-only or mono as present). Output level is full scale, no dialnorm applied.
E-AC-3 (Dolby Digital Plus) is a different codec and is not decoded.
API
decode(src: Uint8Array | ArrayBuffer): Promise<AudioData>
Decode a complete stream.
decoder(): Promise<AC3Decoder>
Synchronous streaming decoder: decode(chunk) returns the samples of every complete frame in the data so far, flush() drops a trailing partial frame, free() releases WASM memory. errors counts frames that failed to decode.
AudioData
{ channelData: Float32Array[], sampleRate: number }License
ॐ · GPL-2.0-or-later, inherited from the bundled liba52.