experiments

util/audio.h

@@ -1,6 +1,12 @@
 /*
 // Created by bruno on 16.2.2025.
 */
+#define SAMPLE_RATE 44100
+#define NUM_SYNTH_VOICES 128
+#define SMOOTHING_FACTOR 0.001f
+#define MIDI_TRACK_MAX 16
+#define MAX_MIDI_EVENTS 1024
+#define MIDI_VOICES MIDI_TRACK_MAX
 
 #ifndef RISCB_AUDIO_H
 #define RISCB_AUDIO_H
@@ -11,23 +17,42 @@
 #include <stdlib.h>
 #include "../tiles/tile.h"
 
-#define SAMPLE_RATE 44100
-#define NUM_SYNTH_VOICES 256
-#define SMOOTHING_FACTOR 0.001f
+
+typedef enum {
+    MIDI_NOTE_OFF = 0x80,
+    MIDI_NOTE_ON = 0x90,
+    MIDI_PROGRAM_CHANGE = 0xC0,
+    // You could add more here if needed
+} MidiEventType;
 
 typedef struct {
     float timeSec;     // When to trigger this event
-    uint8_t type;      // 0 = Note On, 1 = Note Off
+    MidiEventType type;      // 0 = Note On, 1 = Note Off
     uint8_t note;
     uint8_t velocity;
 } MidiEvent;
 
+
+extern MidiEvent midiEvents[MIDI_TRACK_MAX][MAX_MIDI_EVENTS];
+extern int midiEventCount[MIDI_TRACK_MAX];
+extern int nextMidiEvent[MIDI_TRACK_MAX];
+
+
 typedef enum Waveform {
     WAVE_SINE,
     WAVE_SQUARE,
     WAVE_SAWTOOTH,
     WAVE_TRIANGLE,
-    WAVE_NOISE
+    WAVE_NOISE,
+    WAVE_HALF_SINE,
+    WAVE_PULSE25,
+    WAVE_PULSE10,
+    WAVE_CLIPPED_SINE,
+    WAVE_EXP,
+    WAVE_RAMP,
+    WAVE_REVERSE_SAW,
+    WAVE_STAIRCASE,
+    WAVE_COUNT
 } Waveform;
 
 typedef struct SynthVoice {
@@ -50,8 +75,10 @@ extern AudioData audioData;
 
 void audio_callback(void *userdata, Uint8 *stream, int len);
 
-uint16_t getAvailableChannel();
-
 void load_midi_file(const char *path);
 
+uint16_t getAvailableChannel();
+
+Waveform resolvePatch(uint8_t patchNum);
+
 #endif //RISCB_AUDIO_H