59 lines
1.0 KiB
C
59 lines
1.0 KiB
C
/*
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* Midi2Wave
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*
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* Playback controller
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*
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* Load MIDI events into the global variable
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*/
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#ifndef __MIDI2WAVE_H__
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#define __MIDI2WAVE_H__
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#include "sequence.h"
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#define MAX_NOTE 128
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#define KEYBUF_SIZE 5
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#define SINE_SAMPLE_SIZE 256
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#define PIANO(key) (key?(pow(1.0594630943592952645618252949463,key+1-32-49+24)*440):0)
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#define NOTE_NUMBER(index) pgm_read_byte_near(notes+index)
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#define NOTE_DELAY(index) (pgm_read_word_near(params+index)>>4)
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#define NOTE_VEL(index) (pgm_read_word_near(params+index)&15)
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unsigned char volatile active_keys[KEYBUF_SIZE];
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unsigned char volatile key_vels[MAX_NOTE];
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volatile char note_count = 0;
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// The current length in milliseconds
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int event_length = 0;
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// The primary key
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char key = 61;
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/*
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* Setup
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*
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* Initialize stuff
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*/
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void setupMidi();
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/*
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* Render wave buffer
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*
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* Generate the wave buffer with current notes
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*/
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void renderWaveBuffer();
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/*
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* Load next event
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*
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* Load the next midi note/chord
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* Updates the next delay variable
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* Updates LEDs
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*/
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void loadNextEvent();
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#endif
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