pcmprint

commit 39493ed6c4967b95c18a4c62c47bd12c8e07a3ce
parent 777a39d75f570dbfbbb4bf2a05a6358b296329ad
Author: zavok <an2qzavok@gmail.com>
Date:   Tue, 19 Mar 2019 00:15:10 +0300

simplified code somewhat

Diffstat:
M
pcmprint.c
 | 
61
+++++++++++++++++++++++++++++--------------------------------

1 file changed, 29 insertions(+), 32 deletions(-)
diff --git a/pcmprint.c b/pcmprint.c
@@ -4,11 +4,10 @@
 #include <assert.h>
 #include <string.h>
 
-#define BLKSIZE 256
+#define BLKSIZE 1024 //256
 #define CHLEN    32
 
-char *intens[]={"░", "▒", "▓", "█"};
-//char   *intens[]={" ", ".", "o", "8"};
+char *intens[]={".", "0"};
 
 static void
 usage(char *cmd)
@@ -17,29 +16,27 @@ usage(char *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 int
+norm(int v){
+	return (CHLEN + CHLEN * v / 0x7fff) / 2;
 }
 
 static void
-writech(unsigned int *ch)
+drawch(int min, int max)
 {
-	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 cc, i, Min, Max;
+	char *cv;
+	Min = norm(min);
+	Max = norm(max);
+	cv = intens[0];
+	cc = strlen(cv);
+	for (i = 0;   i < Min;   i++) write(1, cv, cc);
+	cv = intens[1];
+	cc = strlen(cv);
+	for (i = Min; i < Max;   i++) write(1, cv, cc);
+	cv = intens[0];
+	cc = strlen(cv);
+	for (i = Max; i < CHLEN; i++) write(1, cv, cc);;
 }
 
 int
@@ -47,23 +44,23 @@ main(int argc, char **argv)
 {
 	ulong i, n;
 	int16_t *blk;
+	int lmin, lmax, rmin,rmax;
 	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);
+		lmin = rmin = 0x7fff;
+		lmax = rmax = -0x7fff;
 		for (i=0; i<BLKSIZE/2; i+=2){
-			chpress(lch, blk[i]);
-			chpress(rch, blk[i+1]);
+			if (blk[i]   > lmax) lmax = blk[i];
+			if (blk[i]   < lmin) lmin = blk[i];
+			if (blk[i+1] > rmax) rmax = blk[i+1];
+			if (blk[i+1] < rmin) rmin = blk[i+1];
 		}
-		writech(lch);
-		write(1, "  ", 2);
-		write(1, "  ", 2);
-		writech(rch);
+		drawch(lmin, lmax);
+		write(1, " ", 1);
+		drawch(rmin, rmax);
 		write(1, "\n", 1);
-		free(lch);
-		free(rch);
 	}
 }