1 files changed, 13 insertions, 18 deletions
diff --git a/src/multimedia/audio/qaudiosystemplugin.cpp b/src/multimedia/audio/qaudiosystemplugin.cpp
index 904cb22e9..636b614d4 100644
--- a/src/multimedia/audio/qaudiosystemplugin.cpp
+++ b/src/multimedia/audio/qaudiosystemplugin.cpp
@@ -39,6 +39,7 @@
 
 
 #include "qaudiosystemplugin.h"
+#include "qaudiosystempluginext_p.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -46,6 +47,10 @@ QAudioSystemFactoryInterface::~QAudioSystemFactoryInterface()
 {
 }
 
+QAudioSystemPluginExtension::~QAudioSystemPluginExtension()
+{
+}
+
 /*!
     \class QAudioSystemPlugin
     \brief The QAudioSystemPlugin class provides an abstract base for audio plugins.
@@ -72,25 +77,15 @@ QAudioSystemFactoryInterface::~QAudioSystemFactoryInterface()
 
     \sa QAbstractAudioDeviceInfo, QAbstractAudioOutput, QAbstractAudioInput
 
-    Qt supports win32, linux(alsa) and \macos 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.
-
-
-    -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.
+    Qt comes with plugins for Windows (WinMM and WASAPI), Linux (ALSA and PulseAudio), \macos / iOS
+    (CoreAudio), Android (OpenSL ES) and QNX.
 
-    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.
+    If 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, make sure the dependencies for the Qt plugins are
+    installed on the system and reconfigure Qt (e.g. alsa-devel package on Linux), 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)
 */