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authorHans Verkuil <hverkuil-cisco@xs4all.nl>2018-10-24 13:51:01 +0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-01-07 21:19:48 +0300
commit245ede423b43a6e081e94e0e5d4e895bd1f31228 (patch)
treeac7bbb0d68e33af0c5edc24a1c63e0b5c6a56099 /include/media
parentc2eb8effb265ac5cdd960d8e61ecb931e9c767cd (diff)
downloadlinux-245ede423b43a6e081e94e0e5d4e895bd1f31228.tar.xz
media: vb2: add vb2_find_timestamp()
Use v4l2_timeval_to_ns instead of timeval_to_ns to ensure that both kernelspace and userspace will use the same conversion function. Next add a new vb2_find_timestamp() function to find buffers with a specific timestamp. This function will only look at DEQUEUED and DONE buffers, i.e. buffers that are already processed. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/videobuf2-v4l2.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h
index 727855463838..a9961bc776dc 100644
--- a/include/media/videobuf2-v4l2.h
+++ b/include/media/videobuf2-v4l2.h
@@ -55,6 +55,23 @@ struct vb2_v4l2_buffer {
#define to_vb2_v4l2_buffer(vb) \
container_of(vb, struct vb2_v4l2_buffer, vb2_buf)
+/**
+ * vb2_find_timestamp() - Find buffer with given timestamp in the queue
+ *
+ * @q: pointer to &struct vb2_queue with videobuf2 queue.
+ * @timestamp: the timestamp to find. Only buffers in state DEQUEUED or DONE
+ * are considered.
+ * @start_idx: the start index (usually 0) in the buffer array to start
+ * searching from. Note that there may be multiple buffers
+ * with the same timestamp value, so you can restart the search
+ * by setting @start_idx to the previously found index + 1.
+ *
+ * Returns the buffer index of the buffer with the given @timestamp, or
+ * -1 if no buffer with @timestamp was found.
+ */
+int vb2_find_timestamp(const struct vb2_queue *q, u64 timestamp,
+ unsigned int start_idx);
+
int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b);
/**