MicroDexed/source_microdexed.h

#pragma once
#include "config.h"
#include "dexed.h"

#include <AudioStream.h>

class AudioSourceMicroDexed : public AudioStream, public Dexed {
  public:
    const uint16_t audio_block_time_us = 1000000 / (SAMPLE_RATE / AUDIO_BLOCK_SAMPLES);
    uint32_t xrun = 0;
    uint16_t render_time_max = 0;
    AudioSourceMicroDexed(int sample_rate) : AudioStream(0, NULL), Dexed(sample_rate) { };
    void update(void) {
      if (in_update) {
        xrun++;
        return;
      }
      else in_update = true;

      elapsedMicros render_time;
      audio_block_t *lblock;
      lblock = allocate();
      if (!lblock) {
        in_update = false;
        return;
      }
      getSamples(AUDIO_BLOCK_SAMPLES, lblock->data);
      if (render_time > audio_block_time_us) // everything greater 2.9ms is a buffer underrun!
        xrun++;
      /*      if (render_time > audio_block_time_us - (audio_block_time_us / 10)) {
               #ifdef DEBUG
              Serial.println("At CPU Limit");
              #endif
              uint8_t nnotes = getNumNotesPlaying();
              //setMaxNotes(nnotes);
              max_notes = nnotes;
            } */

      if (render_time > render_time_max)
        render_time_max = render_time;

      transmit(lblock, 0);
      release(lblock);
      in_update = false;
    };
  private:
    volatile bool in_update = false;
};