Delete record.js

record.js

@@ -1,130 +0,0 @@
-// Shim for Safari.
-window.AudioContext = window.AudioContext || window.webkitAudioContext
-
-function audioBufferToWav(buffer, opt) {
-  opt = opt || {}
-  var numChannels = buffer.numberOfChannels
-  var sampleRate = buffer.sampleRate
-  var format = opt.float32 ? 3 : 1
-  var bitDepth = format === 3 ? 32 : 16
-  var result
-  if (numChannels === 2) {
-    result = interleave(buffer.getChannelData(0), buffer.getChannelData(1))
-  } else {
-    result = buffer.getChannelData(0)
-  }
-  return encodeWAV(result, format, sampleRate, numChannels, bitDepth)
-}
-
-function encodeWAV(samples, format, sampleRate, numChannels, bitDepth) {
-  var bytesPerSample = bitDepth / 8
-  var blockAlign = numChannels * bytesPerSample
-  var buffer = new ArrayBuffer(44 + samples.length * bytesPerSample)
-  var view = new DataView(buffer)
-  /* RIFF identifier */
-  writeString(view, 0, 'RIFF')
-  /* RIFF chunk length */
-  view.setUint32(4, 36 + samples.length * bytesPerSample, true)
-  /* RIFF type */
-  writeString(view, 8, 'WAVE')
-  /* format chunk identifier */
-  writeString(view, 12, 'fmt ')
-  /* format chunk length */
-  view.setUint32(16, 16, true)
-  /* sample format (raw) */
-  view.setUint16(20, format, true)
-  /* channel count */
-  view.setUint16(22, numChannels, true)
-  /* sample rate */
-  view.setUint32(24, sampleRate, true)
-  /* byte rate (sample rate * block align) */
-  view.setUint32(28, sampleRate * blockAlign, true)
-  /* block align (channel count * bytes per sample) */
-  view.setUint16(32, blockAlign, true)
-  /* bits per sample */
-  view.setUint16(34, bitDepth, true)
-  /* data chunk identifier */
-  writeString(view, 36, 'data')
-  /* data chunk length */
-  view.setUint32(40, samples.length * bytesPerSample, true)
-  if (format === 1) { // Raw PCM
-    floatTo16BitPCM(view, 44, samples)
-  } else {
-    writeFloat32(view, 44, samples)
-  }
-  return buffer
-}
-
-function interleave(inputL, inputR) {
-  var length = inputL.length + inputR.length
-  var result = new Float32Array(length)
-  var index = 0
-  var inputIndex = 0
-  while (index < length) {
-    result[index++] = inputL[inputIndex]
-    result[index++] = inputR[inputIndex]
-    inputIndex++
-  }
-  return result
-}
-
-function writeFloat32(output, offset, input) {
- for (var i = 0; i < input.length; i++, offset += 4) {
-  output.setFloat32(offset, input[i], true)
- }
-}
-
-function floatTo16BitPCM(output, offset, input) {
- for (var i = 0; i < input.length; i++, offset += 2) {
-  var s = Math.max(-1, Math.min(1, input[i]))
-  output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true)
- }
-}
-
-function writeString(view, offset, string) {
- for (var i = 0; i < string.length; i++) {
-  view.setUint8(offset + i, string.charCodeAt(i))
- }
-}
-
-// Safari does not support promise-based decodeAudioData, need to use callback instead.
-const decodeAudioData = buffer => new Promise((res, rej) => {
- new AudioContext().decodeAudioData(buffer, res, rej)
-})
-const startRecording = async () => {
- const data = []
- // Ask for mic permissions.
- const stream = await navigator.mediaDevices.getUserMedia({ video: false, audio: true })
- window.stream = stream
- // Use polyfill for older browsers.
- if (!window.MediaRecorder) {
-   window.MediaRecorder = OpusMediaRecorder
-   window.recorder = new MediaRecorder(stream, {}, {
-     OggOpusEncoderWasmPath: 'https://cdn.jsdelivr.net/npm/opus-media-recorder@latest/OggOpusEncoder.wasm',
-     WebMOpusEncoderWasmPath: 'https://cdn.jsdelivr.net/npm/opus-media-recorder@latest/WebMOpusEncoder.wasm'
-   })
- }
- else window.recorder = new MediaRecorder(stream)
- // Handle incoming data.
- window.recorder.ondataavailable = e => data.push(e.data)
- window.recorder.start()
- window.recorder.onerror = e => { throw e.error || new Error(e.name) }
- window.recorder.onstop = async (e) => {
-   const blob = new Blob(data)
-   const fetchedBlob = await fetch(URL.createObjectURL(blob))
-   const arrayBuffer = await fetchedBlob.arrayBuffer()
-   // Convert to wav format.
-   const wav = audioBufferToWav(await decodeAudioData(arrayBuffer))
-   const formData = new FormData()
-   formData.append('files', new Blob([wav], { type: 'audio/wave' }), 'sound.wav')
-   // Send the audio file to Wave server.
-   const res = await fetch(wave.uploadURL, { method: 'POST', body: formData })
-   const { files } = await res.json()
-   // Emit event (q.events.audio.captured) with a URL of the audio file at Wave server.
-   window.wave.emit('audio', 'captured', files[0])
- }
-}
-const stopRecording = () => {
- window.recorder.stop()
- window.stream.getTracks().forEach(track => track.stop())
-}