ref: b00b726e8f50ce92a60909bced989177bc028c73
parent: beb274816e4ac1c0910e8c7297f2a38c29f8fe37
author: Tevo <estevan.cps@gmail.com>
date: Sun Aug 30 21:27:54 EDT 2020
Barebones keyboard demo
--- /dev/null
+++ b/demo/keyboard/main.c
@@ -1,0 +1,82 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+#include <prismriver.h>
+
+void
+usage(void)
+{+ print("Usage: %s [-o <output>] [-b <bufsize>]\n", argv0);+ exits("usage");+}
+
+//const char map[] = "zsxdcvgbhnjm";
+const char map[] = "qazwsxedcrfvtgbyhnujmik,ol.p;/[']";
+
+int indexof(char *str, char c)
+{+ for(int i = 0; str[i] != '\0'; i++)
+ if(str[i] == c)
+ return i;
+ return -1;
+}
+
+void
+main(int argc, char** argv)
+{+ int out = -2, cont = 1, bufsize = 4096;
+ Wavegen *w;
+ ulong clock = 0;
+ Rune e;
+
+ ARGBEGIN {+ case 'o':
+ out = create(EARGF(usage()), OWRITE, 0644);
+ break;
+ case 'b':
+ bufsize = atoi(EARGF(usage()));
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if(out == -2)
+ out = open("/dev/audio", OWRITE);+
+ if(out == -1)
+ sysfatal("open: %r");+
+ initdraw(nil, nil, "Prismsynth");
+ einit(Ekeyboard);
+
+ w = waveform(sine, 1.0, 0);
+
+ while(cont)
+ switch(e = ekbd())
+ {+ case 0x1B: /* Esc */
+ cont = 0;
+ break;
+ default:
+ {+ Buffer *buf;
+ int i = indexof(map, (char)e);
+ if(i < 0)
+ continue;
+ buf = buffermap(nil, w, pitch(i, 4), &clock, 0, 0, bufsize);
+ play(buf, out);
+ destroybuffer(buf);
+ }
+ }
+
+ close(out);
+ exits(0);
+}
+
+void
+eresized(int new)
+{+ if(new)
+ getwindow(display, Refnone);
+}
\ No newline at end of file
--- /dev/null
+++ b/demo/keyboard/mkfile
@@ -1,0 +1,15 @@
+</$objtype/mkfile
+
+OBJ=main.$O
+
+$O.out: $OBJ
+ $LD $OBJ
+
+%.$O: %.c
+ $CC $CFLAGS $stem.c
+
+clean:V:
+ rm -f [$OS].out *.[$OS]
+
+run:V: $O.out
+ $O.out