summaryrefslogtreecommitdiffstats
path: root/Documentation/media/uapi/dvb/audio-fopen.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/media/uapi/dvb/audio-fopen.rst')
-rw-r--r--Documentation/media/uapi/dvb/audio-fopen.rst104
1 files changed, 104 insertions, 0 deletions
diff --git a/Documentation/media/uapi/dvb/audio-fopen.rst b/Documentation/media/uapi/dvb/audio-fopen.rst
new file mode 100644
index 000000000000..ec3b23aa79b3
--- /dev/null
+++ b/Documentation/media/uapi/dvb/audio-fopen.rst
@@ -0,0 +1,104 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _audio_fopen:
+
+================
+DVB audio open()
+================
+
+Name
+----
+
+DVB audio open()
+
+
+Synopsis
+--------
+
+.. cpp:function:: int open(const char *deviceName, int flags)
+
+
+Arguments
+---------
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+
+
+ - .. row 1
+
+ - const char \*deviceName
+
+ - Name of specific audio device.
+
+ - .. row 2
+
+ - int flags
+
+ - A bit-wise OR of the following flags:
+
+ - .. row 3
+
+ -
+ - O_RDONLY read-only access
+
+ - .. row 4
+
+ -
+ - O_RDWR read/write access
+
+ - .. row 5
+
+ -
+ - O_NONBLOCK open in non-blocking mode
+
+ - .. row 6
+
+ -
+ - (blocking mode is the default)
+
+
+Description
+-----------
+
+This system call opens a named audio device (e.g.
+/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
+succeeded, the device will be ready for use. The significance of
+blocking or non-blocking mode is described in the documentation for
+functions where there is a difference. It does not affect the semantics
+of the open() call itself. A device opened in blocking mode can later be
+put into non-blocking mode (and vice versa) using the F_SETFL command
+of the fcntl system call. This is a standard system call, documented in
+the Linux manual page for fcntl. Only one user can open the Audio Device
+in O_RDWR mode. All other attempts to open the device in this mode will
+fail, and an error code will be returned. If the Audio Device is opened
+in O_RDONLY mode, the only ioctl call that can be used is
+AUDIO_GET_STATUS. All other call will return with an error code.
+
+
+Return Value
+------------
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+
+
+ - .. row 1
+
+ - ``ENODEV``
+
+ - Device driver not loaded/available.
+
+ - .. row 2
+
+ - ``EBUSY``
+
+ - Device or resource busy.
+
+ - .. row 3
+
+ - ``EINVAL``
+
+ - Invalid argument.
OpenPOWER on IntegriCloud