/*
* Copyright (c) 2017-2019 Rafael da Silva Rocha.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/**
* @fileoverview The WaveFile class.
* @see https://github.com/rochars/wavefile
*/
/** @module wavefile */
import { encode, decode } from './lib/parsers/base64-arraybuffer.js';
import { WaveFileConverter } from './lib/wavefile-converter';
/**
* A class to manipulate wav files.
* @extends WaveFileConverter
*/
export class WaveFile extends WaveFileConverter {
/**
* @param {Uint8Array=} wav A wave file buffer.
* @throws {Error} If container is not RIFF, RIFX or RF64.
* @throws {Error} If format is not WAVE.
* @throws {Error} If no 'fmt ' chunk is found.
* @throws {Error} If no 'data' chunk is found.
*/
constructor(wav) {
super();
if (wav) {
this.fromBuffer(wav);
}
}
/**
* Use a .wav file encoded as a base64 string to load the WaveFile object.
* @param {string} base64String A .wav file as a base64 string.
* @throws {Error} If any property of the object appears invalid.
*/
fromBase64(base64String) {
this.fromBuffer(decode(base64String));
}
/**
* Return a base64 string representig the WaveFile object as a .wav file.
* @return {string} A .wav file as a base64 string.
* @throws {Error} If any property of the object appears invalid.
*/
toBase64() {
return encode(this.toBuffer());
}
/**
* Return a DataURI string representig the WaveFile object as a .wav file.
* The return of this method can be used to load the audio in browsers.
* @return {string} A .wav file as a DataURI.
* @throws {Error} If any property of the object appears invalid.
*/
toDataURI() {
return 'data:audio/wav;base64,' + this.toBase64();
}
/**
* Use a .wav file encoded as a DataURI to load the WaveFile object.
* @param {string} dataURI A .wav file as DataURI.
* @throws {Error} If any property of the object appears invalid.
*/
fromDataURI(dataURI) {
this.fromBase64(dataURI.replace('data:audio/wav;base64,', ''));
}
}