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media: dev-overlay.rst: cleanup the xvideo example

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It makes more sense to place the xvideo example at the body,
keeping the footnote only to justify the design decision.

While this makes the text better, it also fixes the PDF
output.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2021-03-03 17:19:22 +01:00
parent fea13a6935
commit f9f81841bb
1 changed files with 4 additions and 5 deletions
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9
Documentation/userspace-api/media/v4l/dev-overlay.rst
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@ -37,6 +37,10 @@ capturing and overlay. Optionally these drivers may also permit
capturing and overlay with a single file descriptor for compatibility
with V4L and earlier versions of V4L2. [#f1]_
A common application of two file descriptors is the X11
:ref:`Xv/V4L <xvideo>` interface driver and a V4L2 application.
While the X server controls video overlay, the application can take
advantage of memory mapping and DMA.
Querying Capabilities
=====================
@ -289,11 +293,6 @@ To start or stop the frame buffer overlay applications call the
:ref:`VIDIOC_OVERLAY` ioctl.
.. [#f1]
A common application of two file descriptors is the XFree86
:ref:`Xv/V4L <xvideo>` interface driver and a V4L2 application.
While the X server controls video overlay, the application can take
advantage of memory mapping and DMA.
In the opinion of the designers of this API, no driver writer taking
the efforts to support simultaneous capturing and overlay will
restrict this ability by requiring a single file descriptor, as in