Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/Documentation/media/uapi/v4l/common.rst b/Documentation/media/uapi/v4l/common.rst
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _common:
+
+###################
+Common API Elements
+###################
+Programming a V4L2 device consists of these steps:
+
+-  Opening the device
+
+-  Changing device properties, selecting a video and audio input, video
+   standard, picture brightness a. o.
+
+-  Negotiating a data format
+
+-  Negotiating an input/output method
+
+-  The actual input/output loop
+
+-  Closing the device
+
+In practice most steps are optional and can be executed out of order. It
+depends on the V4L2 device type, you can read about the details in
+:ref:`devices`. In this chapter we will discuss the basic concepts
+applicable to all devices.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    open
+    querycap
+    app-pri
+    video
+    audio
+    tuner
+    standard
+    dv-timings
+    control
+    extended-controls
+    format
+    planar-apis
+    selection-api
+    crop
+    streaming-par