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/midi.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 57 insertions(+), 3 deletions(-)

(limited to 'src/midi.c')

diff --git a/src/midi.c b/src/midi.c
index e1797c8..0bd44a8 100644
--- a/src/midi.c
+++ b/src/midi.c
@@ -17,6 +17,9 @@ void midi_decode(uint32_t msg, synth_t * synth) {
       if (synth->n.key == data1) {
         synth->n.noteOff = Pa_GetStreamTime(synth->stream);
       }
+
+      synth->midi_note[data1].noteOff = Pa_GetStreamTime(synth->stream);
+
       break;
     case 0x09:
       printf("Note On: channel=%d, note=%d, velocity=%d\n", channel, data1, data2);
@@ -27,7 +30,17 @@ void midi_decode(uint32_t msg, synth_t * synth) {
       synth->n.elapsed = 0;
       synth->adsr.elapsed = 0;
       synth->active = 1;
-      synth->gain = data2 / 127.0;
+      //synth->gain = data2 / 127.0;
+
+      
+      //synth->midi_note[i].n = -1;
+      synth->midi_note[data1].freq = notes[data1 % 12][(data1 / 12) % 8];
+      synth->midi_note[data1].channel = channel;
+      synth->midi_note[data1].noteOn = Pa_GetStreamTime(synth->stream);
+      synth->midi_note[data1].noteOff = 0;
+      synth->midi_note[data1].velocity = (float)data2 / 127.0;
+      synth->midi_note[data1].elapsed = 0;
+      synth->midi_note[data1].active = 1;
 
       break;
     case 0x0A:
@@ -35,6 +48,41 @@ void midi_decode(uint32_t msg, synth_t * synth) {
       break;
     case 0x0B:
       printf("Control Change: channel=%d, controller=%d, value=%d\n", channel, data1, data2);
+      int x = data2 < 64 ? 1 : -1;
+      switch (data1) {
+      case 0:
+        synth->adsr.a = synth->adsr.a + (x * 0.01);
+        break;
+      case 1:
+        synth->adsr.d = synth->adsr.d + (x * 0.01);
+        break;
+      case 2:
+        synth->adsr.s = synth->adsr.s + (x * 0.01);
+        break;
+      case 3:
+        synth->adsr.r = synth->adsr.r + (x * 0.01);
+        break;
+      case 4:
+        synth->cutoff = synth->cutoff + (x * (10 * log10(synth->cutoff)));
+        break;
+      case 5:
+        synth->resonance = synth->resonance + (x * 0.02);
+        break;
+      case 6:
+        synth->lfo.freq = synth->lfo.freq + (x * 0.1);
+        break;
+      case 7:
+        synth->lfo.amp = synth->lfo.amp + (x * 0.002);
+        break;
+        break;
+      case 28:
+        synth->filter = x - 1;
+        break;
+      case 29:
+        synth->multi = x - 1;
+        break;
+      default:
+      }
       break;
     case 0x0C:
       printf("Program Change: channel=%d, program=%d\n", channel, data1);
@@ -44,6 +92,7 @@ void midi_decode(uint32_t msg, synth_t * synth) {
       break;
     case 0x0E:
       printf("Pitch Bend: channel=%d, value=%d\n", channel, ((data2 << 7) | data1) - 8192);
+      synth->n.freq = (((data2 << 7) | data1) - 8192);
       break;
     default:
       printf("Unknown MIDI message\n");
@@ -58,10 +107,15 @@ midiCallback(PtTimestamp timestamp, void *userData) {
 
   if (!m->stream) return;
 
-  if (!Pm_Poll(m->stream)) return;
+  //  if (!Pm_Poll(m->stream)) return;
 
   PmEvent buf;
-  Pm_Read(m->stream, &buf, 1);
+  int e = Pm_Read(m->stream, &buf, 1);
+  if (e == 0) return; // nothing to do
+  if (e < 0) {
+    printf("Pm_Read error %d\n", e);
+    return;
+  }
 
   //printf("%d\n", buf.message);
   midi_decode(buf.message, m->synth);
-- 
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