Print TV standards in human-readable form

From: Hans Verkuil <hverkuil@xs4all.nl>



Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

1 files changed, 50 insertions, 1 deletions

diff --git a/test/v4l2-ctl.cpp b/test/v4l2-ctl.cpp
index a9604e650..9604dcc96 100644
--- a/test/v4l2-ctl.cpp
+++ b/test/v4l2-ctl.cpp
@@ -640,6 +640,24 @@ static void parse_next_subopt(char **subs, char **value)
 	}
 }
 
+static void print_std(const char *prefix, const char *stds[], unsigned long long std)
+{
+	int first = 1;
+
+	printf("\t%s-", prefix);
+	while (*stds) {
+		if (std & 1) {
+			if (!first)
+				printf("/");
+			first = 0;
+			printf("%s", *stds);
+		}
+		stds++;
+		std >>= 1;
+	}
+	printf("\n");
+}
+
 int main(int argc, char **argv)
 {
 	char *value, *subs;
@@ -1130,8 +1148,39 @@ int main(int argc, char **argv)
 	}
 
 	if (options[OptGetStandard]) {
-		if (doioctl(fd, VIDIOC_G_STD, &std, "VIDIOC_G_STD") == 0)
+		if (doioctl(fd, VIDIOC_G_STD, &std, "VIDIOC_G_STD") == 0) {
+			static const char *pal[] = {
+				"B", "B1", "G", "H", "I", "D", "D1", "K",
+				"M", "N", "Nc", "60",
+				NULL
+			};
+			static const char *ntsc[] = {
+				"M", "M-JP", "443", "M-KR",
+				NULL
+			};
+			static const char *secam[] = {
+				"B", "D", "G", "H", "K", "K1", "L", "Lc",
+				NULL
+			};
+			static const char *atsc[] = {
+				"ATSC-8-VSB", "ATSC-16-VSB",
+				NULL
+			};
+
 			printf("Video standard = 0x%08llx\n", (unsigned long long)std);
+			if (std & 0xfff) {
+				print_std("PAL", pal, std);
+			}
+			if (std & 0xf000) {
+				print_std("NTSC", ntsc, std >> 12);
+			}
+			if (std & 0xff0000) {
+				print_std("SECAM", secam, std >> 16);
+			}
+			if (std & 0xf000000) {
+				print_std("ATSC/HDTV", atsc, std >> 24);
+			}
+		}
 	}
 
 	if (options[OptListCtrlsMenus]) {