@audin.ai/operator-sdk/dist/audio-worklet.d.ts

Headless browser SDK for the Audin operator softphone — make and receive calls over the Audin operator WebSockets.

/**
 * AudioWorklet processor source for the operator softphone.
 *
 * IMPORTANT: an `AudioWorkletProcessor` runs in `AudioWorkletGlobalScope`, a
 * separate realm with NO module system and NO access to the SDK's other
 * modules. So everything it needs — μ-law codec and linear resampling — is
 * inlined here as a single self-contained source STRING. At runtime the SDK
 * turns this string into a `Blob` URL and `audioWorklet.addModule()`s it (see
 * `audio-client.ts`). Keeping it as an exported string (rather than a separate
 * `.js` asset) means the published bundle is a single file with no asset paths
 * to resolve — the right shape for an embeddable SDK.
 *
 * Two responsibilities, one processor instance:
 *
 *   - CAPTURE: `process()` receives 128-frame Float32 blocks at the context
 *     sample rate (typically 48 kHz). It buffers them, resamples down to
 *     8 kHz, μ-law-encodes, and `postMessage`s the resulting bytes to the main
 *     thread, which forwards them on the audio WebSocket.
 *   - PLAYBACK: the main thread `postMessage`s μ-law bytes received from the
 *     WebSocket; the processor decodes them, upsamples 8 kHz → context rate,
 *     and queues PCM that `process()` drains into the output. A small jitter
 *     buffer smooths network arrival; underflow emits silence.
 *
 * The μ-law tables/logic here are byte-for-byte the same algorithm as
 * `src/codec/mulaw.ts` (kept in sync; the codec KAT guards the canonical
 * source). The inline copy exists only because the worklet realm can't import.
 */
/** Registered name of the worklet processor. */
export declare const OPERATOR_WORKLET_NAME = "audin-operator-audio-processor";
/** The processor source with its registered name substituted in. */
export declare const OPERATOR_WORKLET_SOURCE: string;
/**
 * Build a Blob URL for the worklet module. The caller is responsible for
 * `URL.revokeObjectURL` after `addModule` resolves. Lives here (not in
 * audio-client) so the source string and its packaging stay together.
 */
export declare function createWorkletBlobUrl(): string;