music-metadata
Version:
Music metadata parser for Node.js, supporting virtual any audio and tag format.
64 lines (63 loc) • 1.86 kB
TypeScript
import type { IGetToken } from 'strtok3';
/**
* Opus ID Header interface
* Ref: https://wiki.xiph.org/OggOpus#ID_Header
*/
export interface IIdHeader {
/**
* Magic signature: "OpusHead" (64 bits)
*/
magicSignature: string;
/**
* Version number (8 bits unsigned): 0x01 for this spec
*/
version: number;
/**
* Channel count 'c' (8 bits unsigned): MUST be > 0
*/
channelCount: number;
/**
* Pre-skip (16 bits unsigned, little endian)
*/
preSkip: number;
/**
* Input sample rate (32 bits unsigned, little endian): informational only
*/
inputSampleRate: number;
/**
* Output gain (16 bits, little endian, signed Q7.8 in dB) to apply when decoding
*/
outputGain: number;
/**
* Channel mapping family (8 bits unsigned)
* - 0 = one stream: mono or L,R stereo
* - 1 = channels in vorbis spec order: mono or L,R stereo or ... or FL,C,FR,RL,RR,LFE, ...
* - 2..254 = reserved (treat as 255)
* - 255 = no defined channel meaning
*/
channelMapping: number;
}
declare const OpusContentError_base: {
new (message: string): {
readonly fileType: string;
toString(): string;
name: "UnexpectedFileContentError";
message: string;
stack?: string;
};
captureStackTrace(targetObject: object, constructorOpt?: Function): void;
prepareStackTrace?: ((err: Error, stackTraces: NodeJS.CallSite[]) => any) | undefined;
stackTraceLimit: number;
};
export declare class OpusContentError extends OpusContentError_base {
}
/**
* Opus ID Header parser
* Ref: https://wiki.xiph.org/OggOpus#ID_Header
*/
export declare class IdHeader implements IGetToken<IIdHeader> {
len: number;
constructor(len: number);
get(buf: Uint8Array, off: number): IIdHeader;
}
export {};