From 8c978328b0d69216a1e60c3330c07d83c1408e12 Mon Sep 17 00:00:00 2001
From: erdgeist <erdgeist@bauklotz.fritz.box>
Date: Mon, 16 Apr 2018 15:36:14 +0200
Subject: Add velocity code

---
 arduino/Laserharfe/Laserharfe.ino |  4 +--
 engine.c                          | 57 ++++++++++++++++++++++++++++++---------
 midi-sdl.c                        |  4 +--
 midi.h                            |  2 +-
 4 files changed, 50 insertions(+), 17 deletions(-)

diff --git a/arduino/Laserharfe/Laserharfe.ino b/arduino/Laserharfe/Laserharfe.ino
index 1d7adeb..b219951 100644
--- a/arduino/Laserharfe/Laserharfe.ino
+++ b/arduino/Laserharfe/Laserharfe.ino
@@ -262,9 +262,9 @@ void handle_midi(char *command) {
   Serial.println("- MIDI SENT");
 }
 
-void midi_playnote(int channel, int note, int octave_offset ) {
+void midi_playnote(int channel, int note, int octave_offset, int velocity ) {
   midi_pitchbend(channel, 0);
-  midiEventPacket_t p = { 0x9, 0x90 | channel, note + 12 * octave_offset, 0x7f };
+  midiEventPacket_t p = { 0x9, 0x90 | channel, note + 12 * octave_offset, velocity };
   MidiUSB.sendMIDI(p);
 }
 
diff --git a/engine.c b/engine.c
index 1c4e42a..d9b35f7 100644
--- a/engine.c
+++ b/engine.c
@@ -195,7 +195,7 @@ engine_handle_point(LPoint * p, uint32_t monotime)
     StringConfig *s;;
     int dist_max = 1024 * 1024 * 8;
     int offs, saite = -1, i, oct = 0;
-    int y_viewfield, pitch_factor = 12;
+    int y_viewfield, pitch_factor = 256*128;
     int dv, dt, speed, new_pitch;
 
 #ifndef NO_DISPLAY
@@ -250,29 +250,42 @@ engine_handle_point(LPoint * p, uint32_t monotime)
         oct = -oct;
 
     switch (s->playing) {
-        case silent:
-            midi_playnote(s->channel, s->note, oct);
-            s->playing = in_attack;
+        case string_is_silent:
+            s->playing = string_is_in_attack;
             s->octave = oct;
             s->start_off = s->last_off = offs;
             s->first_time_seen = monotime;
             break;
-        case in_attack:
+        case string_is_in_attack:
             // test if difference is less than g_settled_dist percent of
             // line segment length
-            if (100 * abs(s->last_off - offs) < g_settled_dist << 16) {
-                s->playing = playing;
-                s->current_pitch = 0;
+            dt = monotime - s->first_time_seen;
+            if (dt > 10 && abs(s->last_off - offs) < g_settled_dist) {
+                s->playing = string_is_playing;
 
                 // estimated energy of hand is dv/dt from first seen to settled
                 dv = abs(s->start_off - offs);
-                dt = monotime - s->first_time_seen;
                 if (!dt) ++dt;
                 speed = 1000 * dv / dt; // in offs_prec per second
+//                printf("SPEED: %d (%d) for dt %d\n", speed, 64 + speed / 4000, dt);
+                speed = 64 + speed / 4000;
+                if (speed > 127) speed = 127;
+                midi_playnote(s->channel, s->note, s->octave, speed);
+
+                /* XXX TODO report speed as midi command */
+                s->start_off = offs;
             }
+            s->octave = oct;
             s->last_off = offs;
             break;
-        case playing:
+        case string_is_playing:
+            if (monotime - s->first_time_seen < g_pitchbend_delay)
+                break;
+            s->start_off = offs;
+            s->current_pitch = 0;
+            s->playing = string_is_bending;
+            break;
+        case string_is_bending:
             if (s->pitch_factor)
                 pitch_factor = s->pitch_factor;
             if (s->modifier == pitch_bend_up)
@@ -302,9 +315,29 @@ engine_checksilence(uint32_t monotime)
 
         if (s->mode == midi_controller)
             continue;
+
+        // Play notes in attack that are not visible anymore
+        if (s->playing == string_is_in_attack && (monotime - s->last_time_seen) > 5) {
+            int speed, dv, dt = monotime - s->first_time_seen;
+            if (!dt) ++dt;
+            s->playing = string_is_playing;
+            s->current_pitch = 0;
+
+            // estimated energy of hand is dv/dt from first seen to settled
+            dv = abs(s->start_off - s->last_off);
+            speed = 1000 * dv / dt; // in offs_prec per second
+//            printf("SPEED: %d (%d) for dt %d\n", speed, 64 + speed / 4000, dt);
+            speed = 64 + speed / 4000;
+            if (speed > 127) speed = 127;
+            midi_playnote(s->channel, s->note, s->octave, speed);
+
+            s->start_off =  s->last_off;
+        }
+
         if (s->playing && (monotime - s->last_time_seen > tts)) {
-            midi_silencenote(s->channel, s->note, s->octave);
-            s->playing = silent;
+            if (s->playing >= string_is_playing)
+                midi_silencenote(s->channel, s->note, s->octave);
+            s->playing = string_is_silent;
         }
     }
 }
diff --git a/midi-sdl.c b/midi-sdl.c
index 7509859..a458528 100644
--- a/midi-sdl.c
+++ b/midi-sdl.c
@@ -9,9 +9,9 @@ int  midi_init() {
         return 0;
 }
 
-void midi_playnote( int channel, int note, int octave_offset ) {
+void midi_playnote( int channel, int note, int octave_offset, int velocity ) {
         char out[32];
-        int b = sprintf(out,"M%02X0020\nM%02X%02X%02X\n", 0xe0 | channel, 0x90 | channel, note + 12 * octave_offset, 0x7f);
+        int b = sprintf(out,"M%02X0020\nM%02X%02X%02X\n", 0xe0 | channel, 0x90 | channel, note + 12 * octave_offset, velocity&127);
         if (g_harfe_connected && (g_harfe_fd != -1))
                 write(g_harfe_fd, out, b);
 }
diff --git a/midi.h b/midi.h
index 41a29fe..d2331b4 100644
--- a/midi.h
+++ b/midi.h
@@ -2,7 +2,7 @@
 
 int  midi_init();
 
-void midi_playnote( int channel, int note, int octave_offset );
+void midi_playnote( int channel, int note, int octave_offset, int velocity );
 void midi_silencenote( int channel, int note, int octave_offset );
 void midi_pitchbend( int channel, int pitch );
 //void midi_controller_event( int saite, int value );
-- 
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