[yavta PATCH 1/1] Print V4L2 fourcc code in format enumeration

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

Also print the V4L2 fourcc code in format enumeration (--enum-formats).

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 yavta.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/yavta.c b/yavta.c
index b2283aed09cb..2153e8b5775f 100644
--- a/yavta.c
+++ b/yavta.c
@@ -370,6 +370,18 @@ static struct v4l2_format_info {
 	{ "GENERIC_CSI2_24", V4L2_META_FMT_GENERIC_CSI2_24, 1 },
 };
 
+void v4l2_format_fourcc(__u32 fourcc, char name[5])
+{
+	unsigned int i;
+
+	for (i = 0; i < 4; ++i) {
+		name[i] = fourcc & 0xff;
+		fourcc >>= 8;
+	}
+
+	name[4] = '\0';
+}
+
 static void list_formats(void)
 {
 	unsigned int i;
@@ -412,18 +424,13 @@ static const char *v4l2_format_name(unsigned int fourcc)
 {
 	const struct v4l2_format_info *info;
 	static char name[5];
-	unsigned int i;
 
 	info = v4l2_format_by_fourcc(fourcc);
 	if (info)
 		return info->name;
 
-	for (i = 0; i < 4; ++i) {
-		name[i] = fourcc & 0xff;
-		fourcc >>= 8;
-	}
+	v4l2_format_fourcc(fourcc, name);
 
-	name[4] = '\0';
 	return name;
 }
 
@@ -1815,6 +1822,8 @@ static void video_enum_formats(struct device *dev, enum v4l2_buf_type type)
 	int ret;
 
 	for (i = 0; ; ++i) {
+		char fourcc[5];
+
 		memset(&fmt, 0, sizeof fmt);
 		fmt.index = i;
 		fmt.type = type;
@@ -1829,8 +1838,10 @@ static void video_enum_formats(struct device *dev, enum v4l2_buf_type type)
 			printf("Warning: driver returned wrong format type "
 				"%u.\n", fmt.type);
 
-		printf("\tFormat %u: %s (%08x)\n", i,
-			v4l2_format_name(fmt.pixelformat), fmt.pixelformat);
+		v4l2_format_fourcc(fmt.pixelformat, fourcc);
+		printf("\tFormat %u: %s (%08x, \"%s\")\n", i,
+			v4l2_format_name(fmt.pixelformat), fmt.pixelformat,
+			fourcc);
 		printf("\tType: %s (%u)\n", v4l2_buf_type_name(fmt.type),
 			fmt.type);
 		printf("\tName: %.32s\n", fmt.description);
-- 
2.39.2