Commit c07aa48e authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: videobuf2-core: add request helper functions 



Add a new helper function to tell if a request object is a buffer.

Add a new helper function that returns true if a media_request
contains at least one buffer.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent 394dc588

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

+24 −0
Original line number Diff line number Diff line
@@ -1362,6 +1362,30 @@ static const struct media_request_object_ops vb2_core_req_ops = { 
	.release = vb2_req_release,

};



bool vb2_request_object_is_buffer(struct media_request_object *obj)

{

	return obj->ops == &vb2_core_req_ops;

}

EXPORT_SYMBOL_GPL(vb2_request_object_is_buffer);



bool vb2_request_has_buffers(struct media_request *req)

{

	struct media_request_object *obj;

	unsigned long flags;

	bool has_buffers = false;



	spin_lock_irqsave(&req->lock, flags);

	list_for_each_entry(obj, &req->objects, list) {

		if (vb2_request_object_is_buffer(obj)) {

			has_buffers = true;

			break;

		}

	}

	spin_unlock_irqrestore(&req->lock, flags);

	return has_buffers;

}

EXPORT_SYMBOL_GPL(vb2_request_has_buffers);



int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb)

{

	struct vb2_buffer *vb;

include/media/videobuf2-core.h

+15 −0
Original line number Diff line number Diff line
@@ -1172,4 +1172,19 @@ bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb); 
 */

int vb2_verify_memory_type(struct vb2_queue *q,

		enum vb2_memory memory, unsigned int type);



/**

 * vb2_request_object_is_buffer() - return true if the object is a buffer

 *

 * @obj:	the request object.

 */

bool vb2_request_object_is_buffer(struct media_request_object *obj);



/**

 * vb2_request_has_buffers() - return true if the request contains buffers

 *

 * @req:	the request.

 */

bool vb2_request_has_buffers(struct media_request *req);



#endif /* _MEDIA_VIDEOBUF2_CORE_H */