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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _vidioc-enumaudioout:
+
+***********************
+ioctl VIDIOC_ENUMAUDOUT
+***********************
+
+*man VIDIOC_ENUMAUDOUT(2)*
+
+Enumerate audio outputs
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, int request, struct v4l2_audioout *argp )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <func-open>`.
+
+``request``
+    VIDIOC_ENUMAUDOUT
+
+``argp``
+
+
+Description
+===========
+
+To query the attributes of an audio output applications initialize the
+``index`` field and zero out the ``reserved`` array of a struct
+:ref:`v4l2_audioout <v4l2-audioout>` and call the ``VIDIOC_G_AUDOUT``
+ioctl with a pointer to this structure. Drivers fill the rest of the
+structure or return an EINVAL error code when the index is out of
+bounds. To enumerate all audio outputs applications shall begin at index
+zero, incrementing by one until the driver returns EINVAL.
+
+Note connectors on a TV card to loop back the received audio signal to a
+sound card are not audio outputs in this sense.
+
+See :ref:`vidioc-g-audioout` for a description of struct
+:ref:`v4l2_audioout <v4l2-audioout>`.
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The number of the audio output is out of bounds.
+
+
+.. ------------------------------------------------------------------------------
+.. This file was automatically converted from DocBook-XML with the dbxml
+.. library (https://github.com/return42/sphkerneldoc). The origin XML comes
+.. from the linux kernel, refer to:
+..
+.. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook
+.. ------------------------------------------------------------------------------