cli.js

#!/usr/bin/env node

var fs = require('fs')
var _ = require('underscore')._
var winston = require('winston')

var audiosprite = require('./audiosprite')

var optimist = require('optimist')
  .options('output', {
    alias: 'o'
  , 'default': 'output'
  , describe: 'Name for the output files.'
  })
  .options('path', {
    alias: 'u'
  , 'default': ''
  , describe: 'Path for files to be used on final JSON.'
  })
  .options('export', {
    alias: 'e'
  , 'default': 'ogg,m4a,mp3,ac3'
  , describe: 'Limit exported file types. Comma separated extension list.'
  })
  .options('format', {
    alias: 'f'
  , 'default': 'jukebox'
  , describe: 'Format of the output JSON file (jukebox, howler, createjs).'
  })
  .options('log', {
    alias: 'l'
  , 'default': 'info'
  , describe: 'Log level (debug, info, notice, warning, error).'
  })
  .options('autoplay', {
    alias: 'a'
  , 'default': null
  , describe: 'Autoplay sprite name.'
  })
  .options('loop', {
    'default': null
  , describe: 'Loop sprite name, can be passed multiple times.'
  })
  .options('silence', {
    alias: 's'
  , 'default': 0
  , describe: 'Add special "silence" track with specified duration.'
  })
  .options('gap', {
    alias: 'g'
  , 'default': 1
  , describe: 'Silence gap between sounds (in seconds).'
  })
  .options('minlength', {
    alias: 'm'
  , 'default': 0
  , describe: 'Minimum sound duration (in seconds).'
  })
  .options('bitrate', {
    alias: 'b'
  , 'default': 128
  , describe: 'Bit rate. Works for: ac3, mp3, mp4, m4a, ogg.'
  })
  .options('vbr', {
    alias: 'v'
  , 'default': -1
  , describe: 'VBR [0-9]. Works for: mp3. -1 disables VBR.'
  })
  .options('samplerate', {
    alias: 'r'
  , 'default': 44100
  , describe: 'Sample rate.'
  })
  .options('channels', {
    alias: 'c'
  , 'default': 1
  , describe: 'Number of channels (1=mono, 2=stereo).'
  })
  .options('rawparts', {
    alias: 'p'
  , 'default': ''
  , describe: 'Include raw slices(for Web Audio API) in specified formats.'
  })
  .options('help', {
    alias: 'h'
  , describe: 'Show this help message.'
  })

var argv = optimist.argv
var opts = _.extend({}, argv)

winston.remove(winston.transports.Console)
winston.add(winston.transports.Console, {
  colorize: true
, level: argv.log
, handleExceptions: false
})
winston.debug('Parsed arguments', argv)

opts.logger = winston

opts.bitrate = parseInt(argv.bitrate, 10)
opts.samplerate = parseInt(argv.samplerate, 10)
opts.channels = parseInt(argv.channels, 10)
opts.gap = parseFloat(argv.gap)
opts.minlength = parseFloat(argv.minlength)
opts.vbr = parseInt(argv.vbr, 10)

opts.loop = argv.loop ? [].concat(argv.loop) : []

var files = _.uniq(argv._)

if (argv.help || !files.length) {
  if (!argv.help) {
    winston.error('No input files specified.')
  }
  winston.info('Usage: audiosprite [options] file1.mp3 file2.mp3 *.wav')
  winston.info(optimist.help())
  process.exit(1)
}

audiosprite(files, opts, function(err, obj) {
  if (err) {
    winston.error(err)
    process.exit(0)
  }
  var jsonfile = opts.output + '.json'
  fs.writeFileSync(jsonfile, JSON.stringify(obj, null, 2))
  winston.info('Exported json OK', { file: jsonfile })
  winston.info('All done')
})