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| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-03-03 19:19:22 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-03-11 13:59:40 +0300 |
| commit | f9f81841bba3e76aaeed5a50bb5c756811b75234 (patch) | |
| tree | 8c4f1b20f8f5353aee262160f924317f2b7df4d8 /Documentation/userspace-api/media | |
| parent | fea13a6935c79896a53a8ede32b0b6f6bce5042c (diff) | |
| download | linux-f9f81841bba3e76aaeed5a50bb5c756811b75234.tar.xz | |
media: dev-overlay.rst: cleanup the xvideo example
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>
Diffstat (limited to 'Documentation/userspace-api/media')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/dev-overlay.rst | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/Documentation/userspace-api/media/v4l/dev-overlay.rst b/Documentation/userspace-api/media/v4l/dev-overlay.rst index 07cc92564c16..4f4b23b95b9b 100644 --- a/Documentation/userspace-api/media/v4l/dev-overlay.rst +++ b/Documentation/userspace-api/media/v4l/dev-overlay.rst @@ -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 |