wavefile
Version:
Create, read and write wav files according to the specs.
188 lines (176 loc) • 6.23 kB
JavaScript
/*
* 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 wavefile CLI.
* @see https://github.com/rochars/wavefile
*/
const WaveFile = require('../dist/wavefile.js').WaveFile;
const fs = require('fs');
/** @type {string} */
const presentation = " WaveFile 8.1.0\n" +
" Copyright (c) 2017-2018 Rafael da Silva Rocha.\n";
/** @type {string} */
const help = " Usage:\n" +
"\n" +
" wavefile path/to/input.wav [...options] path/to/output.wav\n" +
"\n" +
" Available options:\n" +
"\n" +
" --resample Ex: wavefile input.wav --resample=16000 output.wav\n" +
" Change the sample rate. The input file is not affected\n" +
" Use with --method to change the interpolation method:\n" +
" Ex: wavefile in.wav --resample=8000 --method=sinc out.wav\n" +
" If --method is ommited, cubic interpolation will be used.\n" +
"\n" +
" --bitdepth Ex: wavefile input.wav --bitdepth=32f output.wav\n" +
" Change the bit depth.\n" +
" The input file is not affected.\n" +
" Possible values: 8, 16, 24, 32, 32f, 64\n" +
"\n" +
" --compress Ex: wavefile input.wav --compress=adpcm output.wav\n" +
" Apply compression to the file.\n" +
" The input file is not affected.\n" +
" Possible values: adpcm, alaw, mulaw\n" +
"\n" +
" --tag Ex: wavefile input.wav --tag=ICRD\n" +
" Print the value of tag if the tag exists.\n" +
"\n" +
" --list-tags Ex: wavefile input.wav --list-tags\n" +
" Print all tags of the file.\n" +
"\n" +
" --list-cue Ex: wavefile input.wav --list-cue\n" +
" Print all the cue points of the file.\n" +
"\n" +
" --bits Ex: wavefile input.wav --bits\n" +
" Print the bit depth of the file.\n" +
"\n" +
" --rate Ex: wavefile input.wav --rate\n" +
" Print the sample rate of the file.\n" +
"\n" +
" --help Ex: --help\n" +
" Show this help page.\n" +
"\n";
// Help
if (process.argv[2] == '-h' ||
process.argv[2] == '--help' || process.argv.length < 4) {
console.log(presentation);
console.log(help);
process.exit();
}
/**
* Anything that is not a command will be considered a file reference;
* the first item in the list will be considered the input, all
* others will be considered output.
* @type {!Array<string>}
*/
let files = [];
/**
* Anything that is not a file will be considered a command;
* All commands should be executed against the input file.
* @type {Object}
*/
let commands = {};
// parse args
for (let arg=2; arg<process.argv.length; arg++) {
if (process.argv[arg].slice(0, 1) == '-') {
commands[process.argv[arg].split("=")[0]] = process.argv[arg].split("=")[1];
} else {
files.push(process.argv[arg]);
}
}
// Load the input file
/** @type {!Object} */
let wav = new WaveFile(fs.readFileSync(files[0]));
files.splice(0, 1);
// Run the commands
/** @type {boolean} */
let shouldWrite = false;
for (let command in commands) {
// --bitdepth
if (command == '--bitdepth') {
wav.toBitDepth(commands[command]);
shouldWrite = true;
// --resample
} else if (command == '--resample') {
/** @type {!Object} */
let options = {
'method' : commands['--method'] ? commands['--method'] : 'cubic'
};
wav.toSampleRate(parseInt(commands[command], 10), options);
shouldWrite = true;
// --compress
} else if (command == '--compress') {
if (commands[command] == 'adpcm') {
wav.toIMAADPCM();
shouldWrite = true;
} else if (commands[command] == 'alaw') {
wav.toALaw();
shouldWrite = true;
} else if (commands[command] == 'mulaw') {
wav.toMuLaw();
shouldWrite = true;
}
// --tag
} else if (command == '--tag') {
console.log(wav.getTag(commands[command]));
// --list-tag
} else if (command == '--list-tags') {
/** @type {!Object} */
tags = wav.listTags();
for (var tag in tags) {
if (tags.hasOwnProperty(tag)) {
console.log(tag + ': ' + tags[tag]);
}
}
// --list-cue
} else if (command == '--list-cue') {
console.log(wav.listCuePoints());
// --bits
} else if (command == '--bits') {
if (wav.fmt.validBitsPerSample) {
console.log(wav.fmt.validBitsPerSample);
} else {
console.log(wav.fmt.bitPerSample);
}
// --rate
} else if (command == '--rate') {
console.log(wav.fmt.sampleRate);
// error
} else {
if (!(command === '--method' && commands['--resample'])) {
console.log('ERROR: Bad option. Run wavefile -h to check the available'+
' options.');
process.exit();
}
}
}
// Write the output file
if (shouldWrite) {
if (files.length) {
for (let file in files) {
fs.writeFileSync(files[file], wav.toBuffer());
}
}
}