参照元†
- struct vb2_queue *q
- unsigned int index
- void *pb
返り値†
/**
* vb2_core_querybuf() - query video buffer information
* @q: videobuf queue
* @index: id number of the buffer
* @pb: buffer struct passed from userspace
*
* Should be called from vidioc_querybuf ioctl handler in driver.
* The passed buffer should have been verified.
* This function fills the relevant information for the userspace.
*
* The return values from this function are intended to be directly returned
* from vidioc_querybuf handler in driver.
*/
int vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb)
{
return call_bufop(q, fill_user_buffer, q->bufs[index], pb);
}
EXPORT_SYMBOL_GPL(vb2_core_querybuf);
コメント†