Add check to libv4l of the sensor orientation as reported by
VIDIOC_ENUMINPUT
Signed-off-by: Adam Baker <li...@baker-net.org.uk>
---
diff -r a647c2dfa989 v4l2-apps/lib/libv4l/libv4lconvert/libv4lconvert.c
--- a/v4l2-apps/lib/libv4l/libv4lconvert/libv4lconvert.c Tue Jan 20
11:25:54 2009 +0100
+++ b/v4l2-apps/lib/libv4l/libv4lconvert/libv4lconvert.c Sun Mar 29
22:59:56 2009 +0100
@@ -29,6 +29,11 @@
#define MIN(a,b) (((a)<(b))?(a):(b))
#define ARRAY_SIZE(x) ((int)sizeof(x)/(int)sizeof((x)[0]))
+/* Workaround this potentially being missing from videodev2.h */
+#ifndef V4L2_IN_ST_VFLIP
+#define V4L2_IN_ST_VFLIP 0x00000020 /* Output is flipped vertically */
+#endif
+
/* Note for proper functioning of v4lconvert_enum_fmt the first entries in
supported_src_pixfmts must match with the entries in supported_dst_pixfmts */
#define SUPPORTED_DST_PIXFMTS \
@@ -134,6 +139,7 @@
int i, j;
struct v4lconvert_data *data = calloc(1, sizeof(struct v4lconvert_data));
struct v4l2_capability cap;
+ struct v4l2_input input;
if (!data)
return NULL;
@@ -161,6 +167,13 @@
/* Check if this cam has any special flags */
data->flags = v4lconvert_get_flags(data->fd);
+ if ((syscall(SYS_ioctl, fd, VIDIOC_G_INPUT, &input.index) == 0) &&
+ (syscall(SYS_ioctl, fd, VIDIOC_ENUMINPUT, &input) == 0)) {
+ /* Don't yet support independent HFLIP and VFLIP so getting
+ * image the right way up is highest priority. */
+ if (input.status & V4L2_IN_ST_VFLIP)
+ data->flags |= V4LCONVERT_ROTATE_180;
+ }
if (syscall(SYS_ioctl, fd, VIDIOC_QUERYCAP, &cap) == 0) {
if (!strcmp((char *)cap.driver, "uvcvideo"))
data->flags |= V4LCONVERT_IS_UVC;
--
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