videoout: Add rotation support

3 files changed, 13 insertions, 3 deletions

diff --git a/live.c b/live.c
index d1785da..e13a210 100644
--- a/live.c
+++ b/live.c
@@ -879,7 +879,7 @@ int main(int argc __attribute__((__unused__)), char *argv[] __attribute__((__unu
 	format.pixelformat = V4L2_PIX_FMT_YUYV;
 	format.width = rect.width;
 	format.height = rect.height;
-	vo = vo_init(vo_devname, &vo_ops, buffers, &format);
+	vo = vo_init(vo_devname, &vo_ops, buffers, &format, 0);
 	if (vo == NULL) {
 		printf("error: unable to initialize video output\n");
 		goto cleanup;
diff --git a/videoout.c b/videoout.c
index 51bed8b..f12ee68 100644
--- a/videoout.c
+++ b/videoout.c
@@ -54,11 +54,13 @@ struct videoout
 struct videoout *vo_init(const char *devname,
 			 const struct video_out_operations *ops,
 			 unsigned int buffers,
-			 struct v4l2_pix_format *format)
+			 struct v4l2_pix_format *format,
+			 unsigned int rotation)
 {
 	struct v4l2_pix_format pixfmt;
 	struct v4l2_format fmt;
 	struct videoout *vo;
+	int32_t ctrl;
 	int ret;
 
 	/* Allocate the video output object. */
@@ -76,6 +78,13 @@ struct videoout *vo_init(const char *devname,
 		goto error;
 	}
 
+	ctrl = rotation;
+	ret = v4l2_set_control(vo->dev, V4L2_CID_ROTATE, &ctrl);
+	if (ret < 0) {
+		perror("failed to configure rotation\n");
+		goto error;
+	}
+
 	pixfmt.pixelformat = format->pixelformat;
 	pixfmt.width = format->width;
 	pixfmt.height = format->height;
diff --git a/videoout.h b/videoout.h
index 0f4cc4c..bcef450 100644
--- a/videoout.h
+++ b/videoout.h
@@ -37,7 +37,8 @@ struct video_out_operations {
 struct videoout *vo_init(const char *devname,
 			 const struct video_out_operations *ops,
 			 unsigned int buffers,
-			 struct v4l2_pix_format *format);
+			 struct v4l2_pix_format *format,
+			 unsigned int rotation);
 void vo_cleanup(struct videoout *vo);
 
 int vo_enable_colorkey(struct videoout *vo, unsigned int val);