Add -audio-backend and -no-audio-backend configure option.

Allow better control over audio backend used.

Reviewed-by:Justin McPherson

2 files changed, 19 insertions, 0 deletions

diff --git a/src/multimedia/audio/audio.pri b/src/multimedia/audio/audio.pri
index c445941..625b871c 100644
--- a/src/multimedia/audio/audio.pri
+++ b/src/multimedia/audio/audio.pri
@@ -17,6 +17,8 @@ SOURCES += $$PWD/qaudio.cpp \
            $$PWD/qaudioengine.cpp \
            $$PWD/qaudiodevicefactory.cpp
 
+contains(QT_CONFIG, audio-backend) {
+
 mac {
     HEADERS +=  $$PWD/qaudioinput_mac_p.h \
                 $$PWD/qaudiooutput_mac_p.h \
@@ -51,3 +53,6 @@ mac {
         }
     }
 }
+} else {
+    DEFINES += QT_NO_AUDIO_BACKEND
+}
diff --git a/src/multimedia/audio/qaudiodevicefactory.cpp b/src/multimedia/audio/qaudiodevicefactory.cpp
index 89e4394..bc1656d 100644
--- a/src/multimedia/audio/qaudiodevicefactory.cpp
+++ b/src/multimedia/audio/qaudiodevicefactory.cpp
@@ -45,6 +45,7 @@
 #include <private/qfactoryloader_p.h>
 #include "qaudiodevicefactory_p.h"
 
+#ifndef QT_NO_AUDIO_BACKEND
 #if defined(Q_OS_WIN)
 #include "qaudiodeviceinfo_win32_p.h"
 #include "qaudiooutput_win32_p.h"
@@ -58,6 +59,7 @@
 #include "qaudiooutput_alsa_p.h"
 #include "qaudioinput_alsa_p.h"
 #endif
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -125,10 +127,12 @@ public:
 QList<QAudioDeviceInfo> QAudioDeviceFactory::availableDevices(QAudio::Mode mode)
 {
     QList<QAudioDeviceInfo> devices;
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     foreach (const QByteArray &handle, QAudioDeviceInfoInternal::availableDevices(mode))
         devices << QAudioDeviceInfo(QLatin1String("builtin"), handle, mode);
 #endif
+#endif
     QFactoryLoader* l = loader();
 
     foreach (QString const& key, l->keys()) {
@@ -153,9 +157,11 @@ QAudioDeviceInfo QAudioDeviceFactory::defaultInputDevice()
         if (list.size() > 0)
             return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioInput);
     }
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultInputDevice(), QAudio::AudioInput);
 #endif
+#endif
     return QAudioDeviceInfo();
 }
 
@@ -168,9 +174,11 @@ QAudioDeviceInfo QAudioDeviceFactory::defaultOutputDevice()
         if (list.size() > 0)
             return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioOutput);
     }
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultOutputDevice(), QAudio::AudioOutput);
 #endif
+#endif
     return QAudioDeviceInfo();
 }
 
@@ -178,10 +186,12 @@ QAbstractAudioDeviceInfo* QAudioDeviceFactory::audioDeviceInfo(const QString &re
 {
     QAbstractAudioDeviceInfo *rc = 0;
 
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     if (realm == QLatin1String("builtin"))
         return new QAudioDeviceInfoInternal(handle, mode);
 #endif
+#endif
     QAudioEngineFactoryInterface* plugin =
         qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(realm));
 
@@ -205,10 +215,12 @@ QAbstractAudioInput* QAudioDeviceFactory::createInputDevice(QAudioDeviceInfo con
 {
     if (deviceInfo.isNull())
         return new QNullInputDevice();
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     if (deviceInfo.realm() == QLatin1String("builtin"))
         return new QAudioInputPrivate(deviceInfo.handle(), format);
 #endif
+#endif
     QAudioEngineFactoryInterface* plugin =
         qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));
 
@@ -222,10 +234,12 @@ QAbstractAudioOutput* QAudioDeviceFactory::createOutputDevice(QAudioDeviceInfo c
 {
     if (deviceInfo.isNull())
         return new QNullOutputDevice();
+#ifndef QT_NO_AUDIO_BACKEND
 #if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
     if (deviceInfo.realm() == QLatin1String("builtin"))
         return new QAudioOutputPrivate(deviceInfo.handle(), format);
 #endif
+#endif
     QAudioEngineFactoryInterface* plugin =
         qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));