//#region src/voice/sfu.d.ts
/**
 * Pure utility functions for the Cloudflare Realtime SFU integration.
 *
 * Extracted from sfu.ts for testability. These handle:
 * - Protobuf varint encoding/decoding
 * - SFU WebSocket adapter protobuf packet encoding/decoding
 * - Audio format conversion (48kHz stereo ↔ 16kHz mono)
 */
declare function decodeVarint(
  buf: Uint8Array,
  offset: number
): {
  value: number;
  bytesRead: number;
};
declare function encodeVarint(value: number): Uint8Array;
/** Extract the PCM payload from a protobuf Packet message. */
declare function extractPayloadFromProtobuf(
  data: ArrayBuffer
): Uint8Array | null;
/** Encode PCM payload into a protobuf Packet message (for ingest/buffer mode — just payload). */
declare function encodePayloadToProtobuf(payload: Uint8Array): ArrayBuffer;
/** Downsample 48kHz stereo interleaved PCM to 16kHz mono PCM (both 16-bit LE). */
declare function downsample48kStereoTo16kMono(
  stereo48k: Uint8Array
): ArrayBuffer;
/** Upsample 16kHz mono PCM to 48kHz stereo interleaved PCM (both 16-bit LE). */
declare function upsample16kMonoTo48kStereo(mono16k: ArrayBuffer): Uint8Array;
interface SFUConfig {
  appId: string;
  apiToken: string;
}
declare function sfuFetch(
  config: SFUConfig,
  path: string,
  body: unknown
): Promise<unknown>;
declare function createSFUSession(config: SFUConfig): Promise<{
  sessionId: string;
}>;
declare function addSFUTracks(
  config: SFUConfig,
  sessionId: string,
  body: unknown
): Promise<unknown>;
declare function renegotiateSFUSession(
  config: SFUConfig,
  sessionId: string,
  sdp: string
): Promise<unknown>;
declare function createSFUWebSocketAdapter(
  config: SFUConfig,
  tracks: unknown[]
): Promise<unknown>;
//#endregion
export {
  SFUConfig,
  addSFUTracks,
  createSFUSession,
  createSFUWebSocketAdapter,
  decodeVarint,
  downsample48kStereoTo16kMono,
  encodePayloadToProtobuf,
  encodeVarint,
  extractPayloadFromProtobuf,
  renegotiateSFUSession,
  sfuFetch,
  upsample16kMonoTo48kStereo
};
//# sourceMappingURL=sfu.d.ts.map