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media: videobuf2: Introduce vb2_find_buffer()

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All users of vb2_find_timestamp() combine it with vb2_get_buffer()
to retrieve a videobuf2 buffer, given a u64 timestamp.

Introduce an API for this use-case. Users will be converted to the new
API as follow-up commits.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Acked-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Ezequiel Garcia 2022-07-11 22:11:34 +01:00 committed by Mauro Carvalho Chehab
parent f0b4a9c46c
commit 9d042e457e
2 changed files with 22 additions and 0 deletions
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12
drivers/media/common/videobuf2/videobuf2-v4l2.c
View File

@ -638,6 +638,18 @@ int vb2_find_timestamp(const struct vb2_queue *q, u64 timestamp,
}
EXPORT_SYMBOL_GPL(vb2_find_timestamp);
struct vb2_buffer *vb2_find_buffer(struct vb2_queue *q, u64 timestamp)
{
unsigned int i;
for (i = 0; i < q->num_buffers; i++)
if (q->bufs[i]->copied_timestamp &&
q->bufs[i]->timestamp == timestamp)
return vb2_get_buffer(q, i);
return NULL;
}
EXPORT_SYMBOL_GPL(vb2_find_buffer);
/*
* vb2_querybuf() - query video buffer information
* @q: videobuf queue

10
include/media/videobuf2-v4l2.h
View File

@ -78,6 +78,16 @@ struct vb2_v4l2_buffer {
int vb2_find_timestamp(const struct vb2_queue *q, u64 timestamp,
unsigned int start_idx);
/**
* vb2_find_buffer() - Find a buffer with given timestamp
*
* @q: pointer to &struct vb2_queue with videobuf2 queue.
* @timestamp: the timestamp to find.
*
* Returns the buffer with the given @timestamp, or NULL if not found.
*/
struct vb2_buffer *vb2_find_buffer(struct vb2_queue *q, u64 timestamp);
int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b);
/**