pcmprint

commit e0212198dd7ab453a0616bdeda6a395a1811f204
parent 39493ed6c4967b95c18a4c62c47bd12c8e07a3ce
Author: zavok <an2qzavok@gmail.com>
Date:   Tue, 19 Mar 2019 15:25:35 +0300

added -w -b parameters, reading from file

Diffstat:
M
pcmprint.c
 | 
72
++++++++++++++++++++++++++++++++++++++++++++++++------------------------

1 file changed, 48 insertions(+), 24 deletions(-)
diff --git a/pcmprint.c b/pcmprint.c
@@ -1,18 +1,17 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <assert.h>
 #include <string.h>
+#include <fcntl.h>
+static int BLKSIZE = 1024;
+static int CHLEN   = 32;
 
-#define BLKSIZE 1024 //256
-#define CHLEN    32
-
-char *intens[]={".", "0"};
+char intens[] = {'.', '0'};
 
 static void
 usage(char *cmd)
 {
-	dprintf(2, "usage: %s [pcmfile]", cmd);
+	dprintf(2, "usage: %s [-w WIDTH] [-b BLOCKSIZE] [pcmfile]\n", cmd);
 	exit(-1);
 }
 
@@ -24,32 +23,49 @@ norm(int v){
 static void
 drawch(int min, int max)
 {
-	int cc, i, Min, Max;
-	char *cv;
+	int i, Min, Max;
 	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);;
+	for (i = 0; i < CHLEN; i++)
+		if ((i>=Min)&&(i<=Max)) write(1, &intens[1], 1);
+		else write(1, &intens[0], 1);
 }
 
 int
 main(int argc, char **argv)
 {
-	ulong i, n;
+	char buf[11];
+	ulong i, n, l, s;
 	int16_t *blk;
-	int lmin, lmax, rmin,rmax;
-	blk = malloc(BLKSIZE);
-	if (argc > 1){
-		usage(*argv);
+	int ch, f, lmin, lmax, rmin,rmax;
+	f = 0;
+	while ((ch = getopt(argc, argv, "b:w:")) != -1){
+		switch (ch){
+		case 'b':
+			BLKSIZE = atoi(optarg);
+			if (BLKSIZE <= 0) BLKSIZE = 1;
+			break;
+		case 'w':
+			CHLEN = atoi(optarg);
+			if (CHLEN <= 0) CHLEN = 1;
+			break;
+		default:
+			usage(argv[0]);
+		}
 	}
-	while ((n = read(0, blk, BLKSIZE)) > 0){
+	if (argc-optind > 1) usage(argv[0]);
+	if (argv[optind] != 0){
+		f = open(argv[optind], O_RDONLY);
+		if (f == -1) {
+			dprintf(2, "Error: can't open %s\n", argv[optind]);
+			exit(-1); 
+		}
+	}
+	BLKSIZE = BLKSIZE * 4; /*2 channels x 2 bytes*/
+	blk = malloc(BLKSIZE);
+	l = 44100*4;
+	s = -1;
+	while ((n = read(f, blk, BLKSIZE)) > 0){
 		lmin = rmin = 0x7fff;
 		lmax = rmax = -0x7fff;
 		for (i=0; i<BLKSIZE/2; i+=2){
@@ -58,9 +74,17 @@ main(int argc, char **argv)
 			if (blk[i+1] > rmax) rmax = blk[i+1];
 			if (blk[i+1] < rmin) rmin = blk[i+1];
 		}
+		l += n;
 		drawch(lmin, lmax);
-		write(1, " ", 1);
+		if (l > 44100*4){
+			s++;
+			l -= 44100*4;
+			snprintf(buf, 11,  " %02d:%02d:%02d ",
+				(s/3600)%99, (s/60)%60, s%60);
+			write(1, buf, 10);
+		} else  write(1, "          ", 10);
 		drawch(rmin, rmax);
 		write(1, "\n", 1);
 	}
+	return 0;
 }