Remove unused files

[rbdr/r.bdr.sh] / jekyll / js / unlimited_pizza / pepperoni.js

'use strict';

const internals = {

  config: {
    convolverNode: {
      requestMethod: 'GET',
      requestLocation: '/reverb.ogg',
      responseType: 'arraybuffer'
    },
    distortionNode: {
      amount: 400
    }
  },

  kTemplate: `<a class="record-button">Record.</a>
<div class="record-info">
  <div class="record-progress">
    <div class="record-progress-bar-container">
      <div class="record-progress-bar"></div>
    </div>
    <a class="record-clear">Clear recording.</a>
  </div>
  <audio class="record-preview" controls></audio>
  <div class="filter-switches">
    <input class="filter-switch" name="bandpass-filter" type="checkbox" /> <label for="bandpass-filter">Band Pass</label>
    <input class="filter-switch" name="hipass-filter" type="checkbox" /> <label for="hipass-filter">Hi Pass</label>
    <input class="filter-switch" name="lopass-filter" type="checkbox" /> <label for="lopass-filter">Lo Pass</label>
    <input class="filter-switch" name="reverb-filter" type="checkbox" /> <label for="reverb-filter">Reverb</label>
    <input class="filter-switch" name="distort-filter" type="checkbox" /> <label for="distort-filter">Distort</label>
  </div>
</div>`,
  kPauseLabel : 'Pause.',
  kRecordLabel : 'Record.',
};

const Pepperoni = class Pepperoni {
  constructor() {

    const context = new AudioContext();

    const nodes = this._createNodes(context);

    this._activatedNodes = [];
  },

  _createNodes(context) {

    const delayNode = context.createDelay(1.0);

    const convolverNode = context.createConvolver();
    this._initializeConvolverNode(convolverNode);

    const loPassFilterNode = context.createBiquadFilter();
    loPassFilterNode.type = 'lowpass';
    loPassFilterNode.frequency.value = 1000;
    loPassFilterNode.gain.value = 25;

    const hiPassFilterNode = context.createBiquadFilter();
    hiPassFilterNode.type = 'highpass';
    hiPassFilterNode.frequency.value = 3000;
    hiPassFilterNode.gain.value = 25;

    const bandPassFilterNode = context.createBiquadFilter();
    bandPassFilterNode.type = 'bandpass';
    bandPassFilterNode.frequency.value = 2000;
    bandPassFilterNode.gain.value = 25;

    const distortionNode = context.createWaveShaper();
    distortionNode.curve = this._generateDistortion(400);
    distortionNode.oversample = '4x';
  }

  // Generates a wave to be used with the distortion wave shaper node

  _generateDistortion(amount = 50) {

    const sampleRate = 44100;
    const curve = new Float32Array(sampleRate);
    const angle = Math.PI / 180;

    for (let i = 0; i < sampleRate; ++i) {
      const x = i * 2 / sampleRate - 1;
      curve[i] = ( 3 + amount ) * x * 20 * angle / ( Math.PI + amount * Math.abs(x) );
    }

    return curve;
  },

  // Initializes a convolver node by requesting the reverb sound,
  // decoding it, and attaching it

  _initializeConvolverNode(node) {

    const request = new XMLHttpRequest();
    request.open(config.convolverNode.requestMethod, config.convolverNode.requestLocation);
    request.responseType = config.convolverNode.responseType;
    request.addEventListener('load', (event) => {

      node.context.decodeAudioData(event.target.response, (buffer) => {

        node.buffer = buffer;
      });
    });
    request.send();
  }

  // Handles the XHR response to the reverb file



    if (!this.source) {
      this._getUserMedia({
        audio : true
      }, this._onUserMedia.bind(this), this._onUserMediaError.bind(this))
    }

    this.element.html(this.constructor.INNER_HTML);

    this.controlButton = this.element.find('.record-button');
    this.clearButton = this.element.find('.record-clear');
    this.audioElement = this.element.find('audio');
    this.progressBarContainer = this.element.find('.record-progress-bar-container');
    this.progressBar = this.element.find('.record-progress-bar');
    this.switches = this.element.find('.filter-switch');

    this._bindEvents();
};

const Pepperoni.prototype = {

  _createNodes() {
  
  }

  maxSize : 1048576,
  recording : false,
  source : null,
  recorder : null,
  context : null,
  _delayNode : null,
  _bandPassFilterNode : null,
  _hiPassFilterNode : null,
  _loPassFilterNode : null,
  _convolverNode : null,
  _distortionNode : null,
  _activatedNodes : null,
  workerPath : '/js/vendor/recorderjs/recorderWorker.js',
  init : function init(config) {
  },

  record : function record() {
    if (this.recorder && !this.recording) {
      this._canRecord(function handleCanRecord(canRecord) {
        if (canRecord) {
          this.recording = true;
          this.controlButton.addClass('recording')
          this.controlButton.html(this.constructor.PAUSE);
          this._interval = setInterval(this._onRecordCheck.bind(this), 100);
          this.recorder.record();
        }
      }.bind(this));
    }
  },

  stop : function stop() {
    if (this.recorder && this.recording) {
      this.recording = false;
      this.controlButton.removeClass('recording')
      this.controlButton.html(this.constructor.RECORD);
      clearInterval(this._interval);
      this.recorder.stop();
      this.recorder.exportWAV();
    }
  },

  clear : function clear() {
    if (this.recorder) {
      this.progressBar.width(0);
      this.audioElement.attr('src', '');
      this.audioElement[0].load();
      this.recorder.clear()
    }
  },

  finalize : function finalize(callback) {
    if (this.recorder) {
      this.recorder.exportWAV(callback);
    }
  },

  getBuffer : function getBuffer(callback) {
    if (this.recorder) {
      this.recorder.getBuffer(callback);
    }
  },

  _bindEvents : function bindEvents() {
    var pepperoni = this;

    this.controlButton.on('click', function () {
      if (this.recording) {
        this.stop();
      } else {
        this.record();
      }
    }.bind(this))

    this.clearButton.on('click', function () {
      if (!this.recording) {
        this.clear();
      }
    }.bind(this))

    this.switches.on('change', function (ev) {
      if (!pepperoni.source) {
        this.checked = false;
        return false;
      }
      switch (this.name) {
        case 'delay-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._delayNode);
          } else {
            pepperoni._removeNode(pepperoni._delayNode);
          }
          break;

        case 'hipass-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._hiPassFilterNode);
          } else {
            pepperoni._removeNode(pepperoni._hiPassFilterNode);
          }
          break;

        case 'bandpass-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._bandPassFilterNode);
          } else {
            pepperoni._removeNode(pepperoni._bandPassFilterNode);
          }
          break;

        case 'lopass-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._loPassFilterNode);
          } else {
            pepperoni._removeNode(pepperoni._loPassFilterNode);
          }
          break;

        case 'reverb-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._convolverNode);
          } else {
            pepperoni._removeNode(pepperoni._convolverNode);
          }
          break;

        case 'distort-filter':
          if (this.checked) {
            pepperoni._addNode(pepperoni._distortionNode);
          } else {
            pepperoni._removeNode(pepperoni._distortionNode);
          }

          break;
      }
    });
  },

  _onRecording : function _onRecording(buffer) {
    this._buffer = buffer;

    this.audioElement.attr('src', URL.createObjectURL(buffer));
    this.audioElement[0].load();
  },

  _onUserMedia : function _onUserMedia(localMediaStream) {
    this.source = this.context.createMediaStreamSource(localMediaStream);
    this.recorder = new Recorder(this.source, {
      workerPath : this.workerPath,
      callback : this._onRecording.bind(this)
    });
  },

  _onUserMediaError : function _onUserMediaError(error) {
    console.log("Something went wrong", error);
    this.disable();
  },

  _onRecordCheck : function _onRecordCheck() {
    this._canRecord(function (canRecord, bufferSize) {
      var width =  bufferSize * this.progressBarContainer.width() / this.maxSize;
      this.progressBar.width(width);
      if (!canRecord) {
        this.stop();
      }
    }.bind(this));
  },

  _canRecord : function _canRecord(callback) {
    this.recorder.getBuffer(function getBuffer(buffer) {
      var bufferSize = buffer[0].length + buffer[1].length;
       callback && callback(bufferSize <= this.maxSize, bufferSize);
    }.bind(this));
  },

  _addNode : function _addNode(node) {
    var i;

    i = this._activatedNodes.length;

    this._activatedNodes.push(node);

    if (i === 0) {
      this.source.disconnect();
      this.source.connect(node);
    } else {
      this._activatedNodes[i - 1].disconnect();
      this._activatedNodes[i - 1].connect(node);
    }

    node.connect(this.recorder.node);
    this.recorder.context = node.context;
    this.recorder.node.connect(this.recorder.context.destination)

    console.log("Adding: ", node);
  },

  _removeNode : function _removeNode(node) {
    var i;

    i = this._activatedNodes.indexOf(node);

    node.disconnect();

    if (i === 0 && i + 1 === this._activatedNodes.length) {
      // It was the only one, connect source to recorder.
      this.source.disconnect();
      this.source.connect(this.recorder.node);
    } else if (i === 0) {
      // Normal 0 case, connect source to node. Recorder stays the same
      this.source.disconnect();
      this.source.connect(this._activatedNodes[i+1]);
    } else if (i + 1 === this._activatedNodes.length) {
      // It's not the 0 case, but we need to reconnect to recorder.
      this._activatedNodes[i - 1].disconnect();
      this._activatedNodes[i - 1].connect(this.recorder.node);
    } else {
      // Normal case, connect previous node to node
      this._activatedNodes[i - 1].disconnect();
      this._activatedNodes[i - 1].connect(this._activatedNodes[i + 1]);
    }

    this._activatedNodes.splice(i, 1);

    console.log("Removing: ", node);
  },

  // Normalize get user media
  _getUserMedia : (navigator.getUserMedia ||
                   navigator.webkitGetUserMedia ||
                   navigator.mozGetUserMedia ||
                   navigator.msGetUserMedia).bind(navigator)
}
});