Lines Matching refs:an
38 Applications call the ``VIDIOC_QBUF`` ioctl to enqueue an empty
67 the ``V4L2_BUF_FLAG_DONE`` flag in the ``flags`` field, or it returns an
78 ``flags`` field, or it returns an error code. This ioctl locks the
93 ``flags`` field, or it returns an error code. This ioctl locks the
95 access (usually DMA). If an application accesses (reads/writes) a locked
108 If requests are supported but an invalid request file descriptor is given,
121 to specify this for a capture buffer will result in an ``EBADR`` error.
128 fills all remaining fields or returns an error code. The driver may also
146 immediately with an ``EAGAIN`` error code when no buffer is available.
167 an invalid DMABUF file descriptor.
170 ``VIDIOC_DQBUF`` failed due to an internal error. Can also indicate
175 The driver might dequeue an (empty) buffer despite returning
176 an error, or even stop capturing. Reusing such buffer may be unsafe
184 ``VIDIOC_DQBUF`` returns this on an empty capture queue for mem2mem