Play sound proof-of-concept

play.js.coffee

# --------------------
# Define Audio Context
# --------------------
 
window.AudioContext = window.AudioContext||window.webkitAudioContext
window.MyAudioContext = new AudioContext()
 
window.MyAudioDecodeAndPlay = (arrayBuffer) ->
  MyAudioContext.decodeAudioData arrayBuffer, (buffer) ->
    source = MyAudioContext.createBufferSource()
    source.buffer = buffer
    source.connect MyAudioContext.destination
    source.start 0
  , (e) -> console.log('Error decoding file', e)
 
# --------------
# Load from URL
# --------------
 
window.loadSampleSound = (url) ->
  request = new XMLHttpRequest()
  request.open('GET', url, true)
  request.responseType = 'arraybuffer'
  request.onload = () -> MyAudioDecodeAndPlay request.response
  request.send()
 
urlChecker = document.getElementById('load-url')
urlChecker.addEventListener 'click', (e) ->
  urlContainer = document.getElementById('audio-url')
  loadSampleSound urlContainer.value
 
# --------------
# Load user file
# --------------
 
fileInput = document.querySelector('input[type="file"]')
fileInput.addEventListener 'change', (e) ->
  reader = new FileReader()
  reader.onload = (e) ->
    MyAudioDecodeAndPlay(@result)
  reader.readAsArrayBuffer @files[0]
, false
 
# --------------
# Get User Media
# --------------
 
hasGetUserMedia = () ->
  !!(navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia)
 
if hasGetUserMedia()
  console.log  'Yay! getUserMedia() supported'
else
  console.log 'getUserMedia() is not supported in your browser';
 
onFailSoHard = (e) ->
  console.log('Reeeejected!', e)