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58 lines
1.3 KiB
58 lines
1.3 KiB
#pragma once
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#define USE_XFADE_DATA 1 // TODO
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#include <Audio.h>
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#include <AudioStream.h>
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#include "mdaEPiano.h"
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class AudioSynthEPiano : public AudioStream, public mdaEPiano {
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public:
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const uint16_t audio_block_time_us = 1000000 / (AUDIO_SAMPLE_RATE / AUDIO_BLOCK_SAMPLES);
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uint32_t xrun = 0;
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uint16_t render_time_max = 0;
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AudioSynthEPiano(uint8_t nvoices) : AudioStream(0, NULL), mdaEPiano(nvoices) { };
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void update(void)
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{
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if (in_update == true)
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{
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xrun++;
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return;
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}
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else
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in_update = true;
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elapsedMicros render_time;
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audio_block_t *lblock;
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audio_block_t *rblock;
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lblock = allocate();
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rblock = allocate();
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if (!lblock || !rblock)
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{
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in_update = false;
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return;
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}
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mdaEPiano::process(rblock->data, lblock->data);
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if (render_time > audio_block_time_us) // everything greater audio_block_time_us (2.9ms for buffer size of 128) is a buffer underrun!
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xrun++;
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if (render_time > render_time_max)
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render_time_max = render_time;
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transmit(lblock, 0);
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transmit(rblock, 1);
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release(lblock);
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release(rblock);
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in_update = false;
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};
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private:
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volatile bool in_update = false;
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};
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