Commit 9d042e45 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Mauro Carvalho Chehab
Browse files

media: videobuf2: Introduce vb2_find_buffer() 



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: default avatarEzequiel Garcia <ezequiel@collabora.com>
Acked-by: default avatarTomasz Figa <tfiga@chromium.org>
Reviewed-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent f0b4a9c4

drivers/media/common/videobuf2/videobuf2-v4l2.c

+12 −0
Original line number Diff line number Diff line
@@ -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

include/media/videobuf2-v4l2.h

+10 −0
Original line number Diff line number Diff line
@@ -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);



/**