c532850fd1
Change-Id: Ib7fd75fb93c038f9e8fa9d71b6ad01fb27b97622 Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
134 lines
4.7 KiB
C++
134 lines
4.7 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
|
|
** Contact: http://www.qt-project.org/
|
|
**
|
|
** This file is part of the Qt Toolkit.
|
|
**
|
|
** $QT_BEGIN_LICENSE:LGPL$
|
|
** GNU Lesser General Public License Usage
|
|
** This file may be used under the terms of the GNU Lesser General Public
|
|
** License version 2.1 as published by the Free Software Foundation and
|
|
** appearing in the file LICENSE.LGPL included in the packaging of this
|
|
** file. Please review the following information to ensure the GNU Lesser
|
|
** General Public License version 2.1 requirements will be met:
|
|
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
**
|
|
** In addition, as a special exception, Nokia gives you certain additional
|
|
** rights. These rights are described in the Nokia Qt LGPL Exception
|
|
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU General
|
|
** Public License version 3.0 as published by the Free Software Foundation
|
|
** and appearing in the file LICENSE.GPL included in the packaging of this
|
|
** file. Please review the following information to ensure the GNU General
|
|
** Public License version 3.0 requirements will be met:
|
|
** http://www.gnu.org/copyleft/gpl.html.
|
|
**
|
|
** Other Usage
|
|
** Alternatively, this file may be used in accordance with the terms and
|
|
** conditions contained in a signed written agreement between you and Nokia.
|
|
**
|
|
**
|
|
**
|
|
**
|
|
**
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
|
|
#include "qaudiosystemplugin.h"
|
|
|
|
QT_BEGIN_NAMESPACE
|
|
|
|
/*!
|
|
\class QAudioSystemPlugin
|
|
\brief The QAudioSystemPlugin class provides an abstract base for audio plugins.
|
|
|
|
\ingroup multimedia
|
|
\ingroup multimedia_audio
|
|
\inmodule QtMultimedia
|
|
\internal
|
|
|
|
Writing a audio plugin is achieved by subclassing this base class,
|
|
reimplementing the pure virtual functions keys(), availableDevices(),
|
|
createInput(), createOutput() and createDeviceInfo() then exporting
|
|
the class with the Q_EXPORT_PLUGIN2() macro.
|
|
|
|
Unit tests are available to help in debugging new plugins.
|
|
|
|
\sa QAbstractAudioDeviceInfo, QAbstractAudioOutput, QAbstractAudioInput
|
|
|
|
Qt supports win32, linux(alsa) and Mac OS X standard (builtin to the
|
|
QtMultimedia library at compile time).
|
|
|
|
You can support other backends other than these predefined ones by
|
|
creating a plugin subclassing QAudioSystemPlugin, QAbstractAudioDeviceInfo,
|
|
QAbstractAudioOutput and QAbstractAudioInput.
|
|
|
|
Add "default" to your list of keys() available to override the default
|
|
audio device to be provided by your plugin.
|
|
|
|
-audio-backend configure option will force compiling in of the builtin backend
|
|
into the QtMultimedia library at compile time. This is automatic by default
|
|
and will only be compiled into the library if the dependencies are installed.
|
|
eg. alsa-devel package installed for linux.
|
|
|
|
If the builtin backend is not compiled into the QtMultimedia library and
|
|
no audio plugins are available a fallback dummy backend will be used.
|
|
This should print out warnings if this is the case when you try and use QAudioInput or QAudioOutput. To fix this problem
|
|
reconfigure Qt using -audio-backend or create your own plugin with a default
|
|
key to always override the dummy fallback. The easiest way to determine
|
|
if you have only a dummy backend is to get a list of available audio devices.
|
|
|
|
QAudioDeviceInfo::availableDevices(QAudio::AudioOutput).size() = 0 (dummy backend)
|
|
*/
|
|
|
|
/*!
|
|
Construct a new audio plugin with \a parent.
|
|
This is invoked automatically by the Q_EXPORT_PLUGIN2() macro.
|
|
*/
|
|
|
|
QAudioSystemPlugin::QAudioSystemPlugin(QObject* parent) :
|
|
QObject(parent)
|
|
{}
|
|
|
|
/*!
|
|
Destroy the audio plugin
|
|
|
|
You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.
|
|
*/
|
|
|
|
QAudioSystemPlugin::~QAudioSystemPlugin()
|
|
{}
|
|
|
|
/*!
|
|
\fn QList<QByteArray> QAudioSystemPlugin::availableDevices(QAudio::Mode mode) const
|
|
Returns a list of available audio devices for \a mode
|
|
*/
|
|
|
|
/*!
|
|
\fn QAbstractAudioInput* QAudioSystemPlugin::createInput(const QByteArray& device)
|
|
Returns a pointer to a QAbstractAudioInput created using \a device identifier
|
|
*/
|
|
|
|
/*!
|
|
\fn QAbstractAudioOutput* QAudioSystemPlugin::createOutput(const QByteArray& device)
|
|
Returns a pointer to a QAbstractAudioOutput created using \a device identifier
|
|
|
|
*/
|
|
|
|
/*!
|
|
\fn QAbstractAudioDeviceInfo* QAudioSystemPlugin::createDeviceInfo(const QByteArray& device, QAudio::Mode mode)
|
|
Returns a pointer to a QAbstractAudioDeviceInfo created using \a device and \a mode
|
|
|
|
*/
|
|
|
|
|
|
QT_END_NAMESPACE
|
|
|
|
#include "moc_qaudiosystemplugin.cpp"
|