[RFC 06/10] [media] v4l: add V4L2_EVENT_BUF_QUEUED event

Gustavo Padovan
2017-03-13T19:21:00Z

From: Gustavo Padovan <gustavo.padovan@collabora.com>

Add a new event the userspace can subscribe to receive notifications
about when a buffer was enqueued onto the driver. The event provides
the index of the enqueued buffer.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
---
include/uapi/linux/videodev2.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3b6cfa6..5b44fd0 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -2133,6 +2133,7 @@ struct v4l2_streamparm {
#define V4L2_EVENT_FRAME_SYNC 4
#define V4L2_EVENT_SOURCE_CHANGE 5
#define V4L2_EVENT_MOTION_DET 6
+#define V4L2_EVENT_BUF_QUEUED 7
#define V4L2_EVENT_PRIVATE_START 0x08000000

/* Payload for V4L2_EVENT_VSYNC */
@@ -2185,6 +2186,10 @@ struct v4l2_event_motion_det {
__u32 region_mask;
};

+struct v4l2_event_buf_queued {
+ __u32 index;
+};
+
struct v4l2_event {
__u32 type;
union {
@@ -2193,6 +2198,7 @@ struct v4l2_event {
struct v4l2_event_frame_sync frame_sync;
struct v4l2_event_src_change src_change;
struct v4l2_event_motion_det motion_det;
+ struct v4l2_event_buf_queued buf_queued;
__u8 data[64];
} u;
__u32 pending;
--
2.9.3