diff options
Diffstat (limited to 'Documentation/userspace-api/media/v4l/userp.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/userp.rst | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/Documentation/userspace-api/media/v4l/userp.rst b/Documentation/userspace-api/media/v4l/userp.rst index 2d0fa7353066..db224f9b611e 100644 --- a/Documentation/userspace-api/media/v4l/userp.rst +++ b/Documentation/userspace-api/media/v4l/userp.rst @@ -1,11 +1,5 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/userspace-api/media/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L .. _userp: @@ -85,10 +79,10 @@ buffers it must wait until an empty buffer can be dequeued and reused. Two methods exist to suspend execution of the application until one or more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` blocks when no buffer is in the outgoing queue. When the -``O_NONBLOCK`` flag was given to the :ref:`open() <func-open>` function, +``O_NONBLOCK`` flag was given to the :c:func:`open()` function, :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN`` error code when no buffer is available. The :ref:`select() -<func-select>` or :ref:`poll() <func-poll>` function are always +<func-select>` or :c:func:`poll()` function are always available. To start and stop capturing or output applications call the @@ -108,7 +102,7 @@ Drivers implementing user pointer I/O must support the :ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the -:ref:`select() <func-select>` and :ref:`poll() <func-poll>` function. [#f2]_ +:c:func:`select()` and :c:func:`poll()` function. [#f2]_ .. [#f1] We expect that frequently used buffers are typically not swapped out. @@ -123,6 +117,6 @@ and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the because an application may share them with other processes. .. [#f2] - At the driver level :ref:`select() <func-select>` and :ref:`poll() <func-poll>` are - the same, and :ref:`select() <func-select>` is too important to be optional. + At the driver level :c:func:`select()` and :c:func:`poll()` are + the same, and :c:func:`select()` is too important to be optional. The rest should be evident. |