filmtools

commit 08c5774bdd4f60189f2f49e63b713e68758cef53
parent fdf4f540757312f4e76e5eddbd95f5c2cb9e2691
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date:   Thu, 16 Jul 2020 22:38:29 +0200

Include factor for linear exposure scaling

Diffstat:
M
reciprocity.c
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/reciprocity.c b/reciprocity.c
@@ -46,7 +46,7 @@ usage()
 int
 main(int argc, char **argv)
 {
-	double exponent;
+	double factor, exponent;
 	int i, hour, min, sec, sec_equiv;
 
 	argv0 = *argv;
@@ -65,6 +65,7 @@ main(int argc, char **argv)
 		if (i == LENGTH(films))
 			errx(3, "unknown film type");
 		if (strncasecmp(argv[1], films[i].name, 10) == 0) {
+			factor = films[i].factor;
 			exponent = films[i].exponent;
 			break;
 		}
@@ -73,7 +74,7 @@ main(int argc, char **argv)
 	if (sscanf(argv[2], "%d:%d", &min, &sec) != 2)
 		errx(2, "could not parse time in MM:SS format");
 
-	sec_equiv = pow(min * 60 + sec, exponent);
+	sec_equiv = factor * pow(min * 60 + sec, exponent);
     sec = (int)(sec_equiv) % 60;
 	if ((min = (int)(sec_equiv / 60.0)) >= 60) {
 		hour = (int)(min/60.0);