Samuel Kent
58 lines
2.3 KiB
TypeScript
58 lines
2.3 KiB
TypeScript
/// <reference types="node" />
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import { IRatio } from '../type';
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export declare type StringEncoding = 'ascii' | 'utf8' | 'utf16le' | 'ucs2' | 'base64url' | 'latin1' | 'hex';
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export declare function getBit(buf: Uint8Array, off: number, bit: number): boolean;
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/**
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* Found delimiting zero in uint8Array
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* @param uint8Array Uint8Array to find the zero delimiter in
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* @param start Offset in uint8Array
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* @param end Last position to parse in uint8Array
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* @param encoding The string encoding used
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* @return Absolute position on uint8Array where zero found
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*/
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export declare function findZero(uint8Array: Uint8Array, start: number, end: number, encoding?: StringEncoding): number;
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export declare function trimRightNull(x: string): string;
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/**
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*
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* @param buffer Decoder input data
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* @param encoding 'utf16le' | 'utf16' | 'utf8' | 'iso-8859-1'
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* @return {string}
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*/
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export declare function decodeString(buffer: Buffer, encoding: StringEncoding): string;
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export declare function stripNulls(str: string): string;
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/**
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* Read bit-aligned number start from buffer
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* Total offset in bits = byteOffset * 8 + bitOffset
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* @param buf Byte buffer
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* @param byteOffset Starting offset in bytes
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* @param bitOffset Starting offset in bits: 0 = lsb
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* @param len Length of number in bits
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* @return {number} decoded bit aligned number
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*/
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export declare function getBitAllignedNumber(buf: Uint8Array, byteOffset: number, bitOffset: number, len: number): number;
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/**
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* Read bit-aligned number start from buffer
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* Total offset in bits = byteOffset * 8 + bitOffset
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* @param buf Byte buffer
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* @param byteOffset Starting offset in bytes
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* @param bitOffset Starting offset in bits: 0 = most significant bit, 7 is least significant bit
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* @return {number} decoded bit aligned number
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*/
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export declare function isBitSet(buf: Uint8Array, byteOffset: number, bitOffset: number): boolean;
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export declare function a2hex(str: string): string;
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/**
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* Convert power ratio to DB
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* ratio: [0..1]
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*/
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export declare function ratioToDb(ratio: number): number;
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/**
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* Convert dB to ratio
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* db Decibels
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*/
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export declare function dbToRatio(dB: number): number;
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/**
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* Convert replay gain to ratio and Decibel
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* @param value string holding a ratio like '0.034' or '-7.54 dB'
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*/
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export declare function toRatio(value: string): IRatio;
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