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)) {
	              Serial.println("At CPU Limit");	
                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;
};