patch loading

main.c

@@ -245,19 +245,10 @@ int main(int argc, char **argv) {
 	sr = jack_get_sample_rate(client);
 
 	synth_init(&synth);
-	synth.osc_env.attack = 1;
-	synth.osc_env.decay = 0;
-	synth.osc_env.sustain = 100;
-	synth.osc_env.release = 100;
-	synth.filter_env.attack = 1;
-	synth.filter_env.decay = 300;
-	synth.filter_env.sustain = 0;
-	synth.filter_env.release = 0;
-	synth.filter_eg_intensity = .9;
-	synth.filter_kbd_track = .5;
-	sine_osc_set_freq(&synth.lfo_osc, 6);
-	synth.pitch_bend_range = 12; // semitones
-	synth.monophonic = 1;
+
+	if(optind < argc) {
+		synth_load_patch(&synth, argv[optind]);
+	}
 
 	if (jack_activate(client)) {
 		fprintf (stderr, "cannot activate client");

synth.c

@@ -191,3 +191,61 @@ void synth_pitch_bend(struct Synth *s, int16_t bend) {
 void synth_set_lfo_depth(struct Synth *s, uint8_t mod) {
 	s->lfo_depth = mod / 127.0;
 }
+
+void synth_load_patch(struct Synth *s, const char *filename) {
+	FILE *f = fopen(filename, "r");
+	if(!f) {
+		perror(filename);
+		return;
+	}
+	char buf[256];
+	while(!feof(f)) {
+		fgets(buf, sizeof(buf), f);
+		char *tok = strtok(buf, " \t");
+		if(tok) {
+			char *val = strtok(NULL, " \t");
+			if(val) {
+				if(!strcmp(tok, "lfo_freq")) {
+					sine_osc_set_freq(&s->lfo_osc, strtof(val, NULL));
+				} else if(!strcmp(tok, "osc_env.attack")) {
+					s->osc_env.attack = strtof(val, NULL);
+				} else if(!strcmp(tok, "osc_env.decay")) {
+					s->osc_env.decay = strtof(val, NULL);
+				} else if(!strcmp(tok, "osc_env.sustain")) {
+					s->osc_env.sustain = strtof(val, NULL);
+				} else if(!strcmp(tok, "osc_env.release")) {
+					s->osc_env.release = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_env.attack")) {
+					printf("filter_env.attack %f\n", strtof(val, NULL));
+					s->filter_env.attack = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_env.decay")) {
+					printf("filter_env.decay %f\n", strtof(val, NULL));
+					s->filter_env.decay = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_env.sustain")) {
+					s->filter_env.sustain = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_env.release")) {
+					s->filter_env.release = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_eg_intensity")) {
+					s->filter_eg_intensity  = strtof(val, NULL);
+				} else if(!strcmp(tok, "filter_kbd_track")) {
+					s->filter_kbd_track = strtof(val, NULL);
+				} else if(!strcmp(tok, "pitch_bend_range")) {
+					s->pitch_bend_range = strtof(val, NULL);
+				} else if(!strcmp(tok, "monophonic")) {
+					s->monophonic = atoi(val);
+				} else if(!strcmp(tok, "unison_spread")) {
+					s->unison_spread = strtof(val, NULL);
+				} else if(!strcmp(tok, "stereo_spread")) {
+					s->stereo_spread = strtof(val, NULL);
+				} else if(!strcmp(tok, "cutoff")) {
+					s->cutoff = strtof(val, NULL);
+				} else if(!strcmp(tok, "resonance")) {
+					for(int i = 0; i < SYNTH_NUM_VOICES; i++) {
+						filter_set_resonance(&s->voices[i].filter, strtof(val, NULL));
+					}
+				}
+			}
+		}
+	}
+	fclose(f);
+}

synth.h

@@ -37,6 +37,7 @@ struct Synth {
 };
 
 void synth_init(struct Synth *synth);
+void synth_load_patch(struct Synth *synth, const char *filename);
 void synth_note_on(struct Synth *synth, uint8_t note, uint8_t velocity);
 void synth_note_off(struct Synth *synth, uint8_t note, uint8_t velocity);
 void synth_render_sample(struct Synth *synth, float *out);