foo

[bootcard] / tools / mididump / mididump.c

diff --git a/tools/mididump/mididump.c b/tools/mididump/mididump.c
new file mode 100644 (file)
index 0000000..5502ed6
--- /dev/null
+++ b/tools/mididump/mididump.c
@@ -0,0 +1,106 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "midi.h"
+
+unsigned int calc_reload(int note);
+
+int main(int argc, char **argv)
+{
+       int i, chan = -1;
+       struct midi *midi;
+       struct midi_event *ev;
+       long ticks;
+
+       if(!argv[1]) {
+               fprintf(stderr, "pass the path to a midi file\n");
+               return 1;
+       }
+       if(argv[2]) {
+               if((chan = atoi(argv[2])) < 0 || chan > 127) {
+                       fprintf(stderr, "invalid channel: %d\n", chan);
+                       return 1;
+               }
+       }
+
+       if(!(midi = midi_load(argv[1]))) {
+               fprintf(stderr, "failed to load midi file: %s\n", argv[1]);
+               return 1;
+       }
+
+       if(chan < 0) {
+               printf("midi file: %s\n", argv[1]);
+               if(midi->ppqn > 0) {
+                       printf("  pulses per quarter-note: %d\n", midi->ppqn);
+               }
+               if(midi->fps > 0) {
+                       printf("  fps: %d (ticks per frame: %d)\n", midi->fps, midi->ticks_per_frame);
+               }
+               printf("  tracks: %d\n", midi->num_tracks);
+               for(i=0; i<midi->num_tracks; i++) {
+                       if(midi->tracks[i].name) {
+                               printf("  %d - \"%s\":", i, midi->tracks[i].name);
+                       } else {
+                               printf("  %d:", i);
+                       }
+                       printf(" %d events\n", midi->tracks[i].num_ev);
+               }
+               midi_free(midi);
+               return 0;
+       }
+
+       if(chan >= midi->num_tracks) {
+               fprintf(stderr, "invalid track: %d (file has %d tracks)\n", chan, midi->num_tracks);
+               midi_free(midi);
+               return 1;
+       }
+
+       ticks = 0;
+       ev = midi->tracks[chan].head;
+       while(ev) {
+               ticks += ev->dt;
+               switch(ev->type) {
+               case MIDI_NOTE_ON:
+                       /*printf("%ld: %d (%d)\n", ticks, MIDI_NOTE_NUM(ev), MIDI_NOTE_VEL(ev));*/
+                       if(ticks >= 0) {
+                               printf("\tdw %ld, %u\n", ticks, calc_reload(MIDI_NOTE_NUM(ev)));
+                       }
+                       break;
+
+               case MIDI_NOTE_OFF:
+                       /*printf("%ld: off\n", ticks);*/
+                       if(ticks >= 0) {
+                               printf("\tdw %ld, 0\n", ticks);
+                       }
+                       break;
+
+               default:
+                       break;
+               }
+               ev = ev->next;
+       }
+
+       midi_free(midi);
+       return 0;
+}
+
+
+static float note_freq[] = {
+       27.500, 29.135, 30.868, 32.703, 34.648, 36.708, 38.891, 41.203, 43.654, 46.249,
+       48.999, 51.913, 55.000, 58.270, 61.735, 65.406, 69.296, 73.416, 77.782, 82.407,
+       87.307, 92.499, 97.999, 103.83, 110.00, 116.54, 123.47, 130.81, 138.59, 146.83,
+       155.56, 164.81, 174.61, 185.00, 196.00, 207.65, 220.00, 233.08, 246.94, 261.63,
+       277.18, 293.67, 311.13, 329.63, 349.23, 369.99, 392.00, 415.30, 440.00, 466.16,
+       493.88, 523.25, 554.37, 587.33, 622.25, 659.26, 698.46, 739.99, 783.99, 830.61,
+       880.00, 932.33, 987.77, 1046.5, 1108.7, 1174.7, 1244.5, 1318.5, 1396.9, 1480.0,
+       1568.0, 1661.2, 1760.0, 1864.7, 1975.5, 2093.0, 2217.5, 2349.3, 2489.0, 2637.0,
+       2793.0, 2960.0, 3136.0, 3322.4, 3520.0, 3729.3, 3951.1, 4186.0
+};
+
+#define OSC    1193182
+
+unsigned int calc_reload(int note)
+{
+       if(note < 21 || note > 108) return 0;
+
+       return (int)(OSC / note_freq[note - 21] + 0.5f);
+}