fixed

README.md

@@ -1,10 +1,9 @@
 ![audio-visual.sh and alsamixer](/img/sshot.jpg)
 
-git clone https://git.thedroth.rocks/8nlight/micro-utils  
+.asoundrc (Должно быть в ~/)  
-cc micro-utils/miscutils/spark.c -o ~/spark  
+Нужно поменять rockchipes8316c, на вашу карту (aplay -L)  
 
-.asound (Должно быть в ~/)  
+cc spark.c -lm -s -o spark  
-Нужно поменять rockchipes8316c, на вашу карту  
+modprobe snd-aloop  
-
+chmod +x audio_vis.sh  
-audio-vis.sh  
+./audio_vis.sh  
-Нужно поменять путь до spark (по умолч ~/spark)  

audio_vis.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
-cols=124
+cols=180
 
-arecord -q -c 1 --period-size=256 --buffer-size=512 -f S24_LE -t raw -D loopout | hexdump -e '/4 "%d "' | tr -d '-' | tr -d '*' | xargs -n $cols ~/spark -n
+arecord --rate 48000 --buffer-size=2048 -D loopout -N -q -c 1 -f S24_LE -t raw | hexdump -e '/4 " %d"' | tr -d '*' | tr -d '-' | xargs -n $cols ./spark

spark.c

@@ -0,0 +1,77 @@
+#include <stdio.h>
+#include <float.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+double min = 90000;
+double max = 3000000;
+
+int parse_double(const char *str, double *res) {
+	char *ptr;
+
+	*res = strtod(str, &ptr);
+	if (*ptr)
+		return 0;
+
+	return 1;
+}
+
+void print(double diff, double val) {
+	int lvl = (int)round((val - min + 1) / diff * 7);
+	if (lvl < 0)
+		lvl = 0;
+
+	else if (lvl > 7)
+		lvl = 7;
+
+	putchar('\xe2');
+	putchar('\x96');
+	putchar('\x81' + lvl);
+}
+
+int main(int argc, char **argv) {
+	argv++;
+	argc--;
+
+	if (argc == 0) {
+		fprintf(stderr, "spark: missing operands\n");
+		return 1;
+	}
+
+	size_t as = argc / 2;
+	double *a = malloc((as + 1) * sizeof(double));
+	if (a == NULL)
+		return 1;
+
+	size_t j = 0;
+	for (size_t i = 0; i < as; i++) {
+		double val = 0;
+		if (!parse_double(argv[j], &val)) {
+			j++;
+			continue;
+		}
+
+		double val2 = 0;
+		if (!parse_double(argv[j + 1], &val)) {
+			j++;
+			continue;
+		}
+
+		a[i] = (val + val2) / 2;
+		j++;
+	}
+
+	double diff = max - min + 1;
+	if (diff < 1)
+		diff = 1;
+
+	for (size_t i = 0; i < as; i++)
+		print(diff, a[i]);
+
+	putchar('\r');
+
+	free(a);
+	return 0;
+}