Function process

src/fx/waveform.js:172–220

* Processes the audio and generates the waveform. * * @param {sampleRate} sampleRate - The rate we should sample the audio. * @param {arraybuffer} buffer - The Web Audio API * @param {array} peaks - The peaks in the audio.

(sampleRate, buffer, peaks)

   * @param {array} peaks - The peaks in the audio.
   */
  function process(sampleRate, buffer, peaks) {
    /*
      If we have a buffer, we find the peaks in the audio.
    */
    if (buffer) {
      /*
        Get the total peaks in the song.
      */
      let totalPeaks = peaks.length;

      /*
        Figure out the depth of the peak.
      */
      let d = "";
      for (let peakNumber = 0; peakNumber < totalPeaks; peakNumber++) {
        if (peakNumber % 2 === 0) {
          d += ` M${~~(peakNumber / 2)}, ${peaks.shift()}`;
        } else {
          d += ` L${~~(peakNumber / 2)}, ${peaks.shift()}`;
        }
      }

      /*
        Add the waveform to the built waveforms array.
      */
      config.waveforms.built[
        Math.abs(
          config.audio.src.split("").reduce(function(a, b) {
            a = (a << 5) - a + b.charCodeAt(0);
            return a & a;
          }, 0)
        )
      ] = d;

      /*
        Display the waveform.
      */
      displayWaveForms(
        config.waveforms.built[
          Math.abs(
            config.audio.src.split("").reduce(function(a, b) {
              a = (a << 5) - a + b.charCodeAt(0);
              return a & a;
            }, 0)
          )
        ]
      );
    }
  }

  /**
   * Get the peaks of the audio for the waveform.