From 402f6791150d503fc29ed75a7b8be9abfdd3867f Mon Sep 17 00:00:00 2001
From: gramanas <anastasis.gramm2@gmail.com>
Date: Sat, 29 Apr 2023 14:34:36 +0300
Subject: midi cc

---
 src/synth_engine.h | 46 +++++++++++++++++++++++++++++++---------------
 1 file changed, 31 insertions(+), 15 deletions(-)

(limited to 'src/synth_engine.h')

diff --git a/src/synth_engine.h b/src/synth_engine.h
index b88f3d5..a434b53 100644
--- a/src/synth_engine.h
+++ b/src/synth_engine.h
@@ -8,29 +8,30 @@
 
 #include "notes.h"
 #include "filter.h"
+#include "adsr.h"
 
-#define SAMPLE_RATE   (44100)
-//#define SAMPLE_RATE   (48000)
+//#define SAMPLE_RATE   (44100)
+#define SAMPLE_RATE   (48000)
 #define FRAMES_PER_BUFFER  (210)
 
+#define VIZ_BUF 1024
+
 #define WIDTH 1024
 #define HEIGHT 600
 
+#define MIDI_NOTES 128
+
 #ifndef M_PI
 #define M_PI  (3.14159265)
 #endif
 
-
-typedef struct {
-  float a;
-  float peak;
-  float d;
-  float s;
-  float r;
+typedef struct lfo_t {
+  float freq;
+  float amp;
   unsigned long long elapsed;
-} adsr_t;
+} lfo_t;
 
-typedef struct {
+typedef struct note_t {
   float freq;
   PaTime noteOn;
   PaTime noteOff;
@@ -38,9 +39,20 @@ typedef struct {
   unsigned long long elapsed;
 } note_t;
 
-typedef struct {
+typedef struct midi_note_t {
+  float freq;
+  int channel;
+  PaTime noteOn;
+  PaTime noteOff;
+  float velocity; // normalized
+  unsigned long long elapsed;
+  adsr_t * adsr;
+  int active;
+} midi_note_t;
+
+typedef struct viz_t {
   int sample_rate_divider;
-  float wave[1000200];
+  float wave[VIZ_BUF];
   int wi;
 } viz_t;
 
@@ -51,9 +63,13 @@ typedef struct {
   float gain;
   float x;
 
+  midi_note_t midi_note[MIDI_NOTES];
+
   note_t n;
   adsr_t adsr;
 
+  lfo_t lfo;
+
   int octave;
 
   int poly;
@@ -75,11 +91,11 @@ typedef struct {
   viz_t viz;
 } synth_t;
 
-float adsr_amplitude(void *synthData, unsigned long long elapsed);
 float make_sample(unsigned long long phase, void *synthData, unsigned int sample_rate, int viz);
 void init_synth(synth_t * synth);
 void free_synth(synth_t * synth);
-int sound_gen(const void *inputBuffer, void *outputBuffer,
+int sound_gen(const void *inputBuffer,
+              void *outputBuffer,
               unsigned long framesPerBuffer,
               const PaStreamCallbackTimeInfo* timeInfo,
               PaStreamCallbackFlags statusFlags,
-- 
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