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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2018-10-24 13:51:01 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-01-07 21:19:48 +0300 |
| commit | 245ede423b43a6e081e94e0e5d4e895bd1f31228 (patch) | |
| tree | ac7bbb0d68e33af0c5edc24a1c63e0b5c6a56099 /include/media | |
| parent | c2eb8effb265ac5cdd960d8e61ecb931e9c767cd (diff) | |
| download | linux-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.h | 17 |
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); /** |