commit 747cc6034585ee53e0074c215fa45aba7c87b7d5
Author: an2qzavok <an2qzavok@gmail.com>
Date: Thu, 14 Mar 2019 02:33:50 +0300
basic functionality OK
Diffstat:
| A | Makefile | | | 3 | +++ |
| A | pcmprint.c | | | 68 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 files changed, 71 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,3 @@
+pcmprint:
+ gcc pcmprint.c -o pcmprint
+
diff --git a/pcmprint.c b/pcmprint.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+
+#define BLKSIZE 256
+#define CHLEN 32
+
+char *intens[]={"░", "▒", "▓", "█"};
+
+static void
+usage(char *cmd)
+{
+ dprintf(2, "usage: %s [pcmfile]", cmd);
+ exit(-1);
+}
+
+static void
+chpress(unsigned int *ch, int16_t v)
+{
+ int n;
+ n = (CHLEN + CHLEN * v / 0x7fff) / 2;
+ if (n > 31) n--;
+ assert(n>=0);
+ assert(n<32);
+ ch[n]++;
+}
+
+static void
+writech(unsigned int *ch)
+{
+ int i;
+ for (i=0; i<CHLEN; i++){
+ unsigned int c;
+ c = 0;
+ if (ch[i] > 0) c = 1;
+ if (ch[i] > 16) c = 2;
+ if (ch[i] > 32) c = 3;
+ write(1, intens[c], strlen(intens[c]));
+ }
+}
+
+int
+main(int argc, char **argv)
+{
+ ulong i, n;
+ int16_t *blk;
+ blk = malloc(BLKSIZE);
+ if (argc > 1){
+ usage(*argv);
+ }
+ while ((n = read(0, blk, BLKSIZE)) > 0){
+ unsigned int *lch = calloc(sizeof (int), CHLEN);
+ unsigned int *rch = calloc(sizeof (int), CHLEN);
+ for (i=0; i<BLKSIZE/2; i+=2){
+ chpress(lch, blk[i]);
+ chpress(rch, blk[i+1]);
+ }
+ writech(lch);
+ write(1, " ", 2);
+ write(1, " ", 2);
+ writech(rch);
+ write(1, "\n", 1);
+ free(lch);
+ free(rch);
+ }
+}
