AudioDevices demo doesn't do anything on Windows

-put example audiodevices in layout.
-added more checking to testSettings() in win32 implementation.
-disabled objects in example audiodevices that are not editable.
-added more checking to alsa implementation for preferredFormat().
-changed internal strings from tr to QLatin1String.

Reviewed-by:Justin Mcpherson

8 files changed, 303 insertions, 276 deletions

diff --git a/examples/multimedia/audio/audiodevices/audiodevices.cpp b/examples/multimedia/audio/audiodevices/audiodevices.cpp
index 52aa4db23e..0d305ff0f3 100644
--- a/examples/multimedia/audio/audiodevices/audiodevices.cpp
+++ b/examples/multimedia/audio/audiodevices/audiodevices.cpp
@@ -58,6 +58,14 @@ AudioDevicesBase::~AudioDevicesBase() {}
 AudioTest::AudioTest( QMainWindow *parent, Qt::WFlags f )
     : AudioDevicesBase( parent, f )
 {
+    nearestFreq->setDisabled(true);
+    nearestChannel->setDisabled(true);
+    nearestCodec->setDisabled(true);
+    nearestSampleSize->setDisabled(true);
+    nearestSampleType->setDisabled(true);
+    nearestEndian->setDisabled(true);
+    logOutput->setDisabled(true);
+
     mode = QAudio::AudioOutput;
     modeBox->addItem("Input");
     modeBox->addItem("Output");
@@ -87,6 +95,8 @@ AudioTest::~AudioTest()
 void AudioTest::test()
 {
     // tries to set all the settings picked.
+    logOutput->clear();
+    logOutput->append("NOTE: an invalid codec audio/test exists for testing, to get a fail condition.");
 
     if(device) {
         if(device->isFormatSupported(settings)) {
@@ -179,7 +189,7 @@ void AudioTest::deviceChanged(int idx)
     if(codecz.size())
         settings.setCodec(codecz.at(0));
     // Add false to create failed condition!
-    codecsBox->addItem("audio/mpeg");
+    codecsBox->addItem("audio/test");
 
     sampleSizesBox->clear();
     QList<int> sampleSizez = device->supportedSampleSizes();
diff --git a/examples/multimedia/audio/audiodevices/audiodevicesbase.ui b/examples/multimedia/audio/audiodevices/audiodevicesbase.ui
index 674f2014f6..52073389ab 100644
--- a/examples/multimedia/audio/audiodevices/audiodevicesbase.ui
+++ b/examples/multimedia/audio/audiodevices/audiodevicesbase.ui
@@ -1,7 +1,8 @@
-<ui version="4.0" >
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
  <class>AudioDevicesBase</class>
- <widget class="QMainWindow" name="AudioDevicesBase" >
-  <property name="geometry" >
+ <widget class="QMainWindow" name="AudioDevicesBase">
+  <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
@@ -9,246 +10,223 @@
     <height>702</height>
    </rect>
   </property>
-  <property name="windowTitle" >
+  <property name="windowTitle">
    <string>AudioDevicesBase</string>
   </property>
-  <widget class="QWidget" name="centralwidget" >
-   <property name="geometry" >
-    <rect>
-     <x>0</x>
-     <y>28</y>
-     <width>504</width>
-     <height>653</height>
-    </rect>
-   </property>
-   <widget class="QWidget" name="layoutWidget" >
-    <property name="geometry" >
-     <rect>
-      <x>40</x>
-      <y>21</y>
-      <width>321</width>
-      <height>506</height>
-     </rect>
-    </property>
-    <layout class="QGridLayout" name="gridLayout" >
-     <item row="0" column="0" >
-      <widget class="QLabel" name="deviceLabel" >
-       <property name="sizePolicy" >
-        <sizepolicy vsizetype="Preferred" hsizetype="Preferred" >
-         <horstretch>1</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text" >
-        <string>Device</string>
-       </property>
-      </widget>
-     </item>
-     <item row="0" column="1" >
-      <widget class="QLabel" name="modeLabel" >
-       <property name="text" >
-        <string>Mode</string>
-       </property>
-      </widget>
-     </item>
-     <item row="1" column="0" >
-      <widget class="QComboBox" name="deviceBox" />
-     </item>
-     <item row="1" column="1" >
-      <widget class="QComboBox" name="modeBox" />
-     </item>
-     <item row="2" column="0" >
-      <widget class="QLabel" name="actualLabel" >
-       <property name="frameShape" >
-        <enum>QFrame::Panel</enum>
-       </property>
-       <property name="frameShadow" >
-        <enum>QFrame::Raised</enum>
-       </property>
-       <property name="text" >
-        <string>Actual Settings</string>
-       </property>
-       <property name="alignment" >
-        <set>Qt::AlignCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item row="2" column="1" >
-      <widget class="QLabel" name="nearestLabel" >
-       <property name="frameShape" >
-        <enum>QFrame::Panel</enum>
-       </property>
-       <property name="frameShadow" >
-        <enum>QFrame::Raised</enum>
-       </property>
-       <property name="text" >
-        <string>Nearest Settings</string>
-       </property>
-       <property name="alignment" >
-        <set>Qt::AlignCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item row="3" column="0" >
-      <widget class="QLabel" name="actualFreqLabel" >
-       <property name="text" >
-        <string>Frequency</string>
-       </property>
-      </widget>
-     </item>
-     <item row="3" column="1" >
-      <widget class="QLabel" name="nearestFreqLabel" >
-       <property name="text" >
-        <string>Frequency</string>
-       </property>
-      </widget>
-     </item>
-     <item row="4" column="0" >
-      <widget class="QComboBox" name="frequencyBox" />
-     </item>
-     <item row="4" column="1" >
-      <widget class="QLineEdit" name="nearestFreq" />
-     </item>
-     <item row="5" column="0" >
-      <widget class="QLabel" name="actualChannelsLabel" >
-       <property name="text" >
-        <string>Channels</string>
-       </property>
-      </widget>
-     </item>
-     <item row="5" column="1" >
-      <widget class="QLabel" name="nearestChannelLabel" >
-       <property name="text" >
-        <string>Channel</string>
-       </property>
-      </widget>
-     </item>
-     <item row="6" column="0" >
-      <widget class="QComboBox" name="channelsBox" />
-     </item>
-     <item row="6" column="1" >
-      <widget class="QLineEdit" name="nearestChannel" />
-     </item>
-     <item row="7" column="0" >
-      <widget class="QLabel" name="actualCodecLabel" >
-       <property name="text" >
-        <string>Codecs</string>
-       </property>
-      </widget>
-     </item>
-     <item row="7" column="1" >
-      <widget class="QLabel" name="nearestCodecLabel" >
-       <property name="text" >
-        <string>Codec</string>
-       </property>
-      </widget>
-     </item>
-     <item row="8" column="0" >
-      <widget class="QComboBox" name="codecsBox" />
-     </item>
-     <item row="8" column="1" >
-      <widget class="QLineEdit" name="nearestCodec" />
-     </item>
-     <item row="9" column="0" >
-      <widget class="QLabel" name="actualSampleSizeLabel" >
-       <property name="text" >
-        <string>SampleSize</string>
-       </property>
-      </widget>
-     </item>
-     <item row="9" column="1" >
-      <widget class="QLabel" name="nearestSampleSizeLabel" >
-       <property name="text" >
-        <string>SampleSize</string>
-       </property>
-      </widget>
-     </item>
-     <item row="10" column="0" >
-      <widget class="QComboBox" name="sampleSizesBox" />
-     </item>
-     <item row="10" column="1" >
-      <widget class="QLineEdit" name="nearestSampleSize" />
-     </item>
-     <item row="11" column="0" >
-      <widget class="QLabel" name="actualSampleTypeLabel" >
-       <property name="text" >
-        <string>SampleType</string>
-       </property>
-      </widget>
-     </item>
-     <item row="11" column="1" >
-      <widget class="QLabel" name="nearestSampleTypeLabel" >
-       <property name="text" >
-        <string>SampleType</string>
-       </property>
-      </widget>
-     </item>
-     <item row="12" column="0" >
-      <widget class="QComboBox" name="sampleTypesBox" />
-     </item>
-     <item row="12" column="1" >
-      <widget class="QLineEdit" name="nearestSampleType" />
-     </item>
-     <item row="13" column="0" >
-      <widget class="QLabel" name="actualEndianLabel" >
-       <property name="text" >
-        <string>Endianess</string>
-       </property>
-      </widget>
-     </item>
-     <item row="13" column="1" >
-      <widget class="QLabel" name="nearestEndianLabel" >
-       <property name="text" >
-        <string>Endianess</string>
-       </property>
-      </widget>
-     </item>
-     <item row="14" column="0" >
-      <widget class="QComboBox" name="endianBox" />
-     </item>
-     <item row="14" column="1" >
-      <widget class="QLineEdit" name="nearestEndian" />
-     </item>
-     <item row="15" column="0" colspan="2" >
-      <widget class="QTextEdit" name="logOutput" >
-       <property name="minimumSize" >
-        <size>
-         <width>0</width>
-         <height>40</height>
-        </size>
-       </property>
-      </widget>
-     </item>
-     <item row="16" column="0" colspan="2" >
-      <widget class="QPushButton" name="testButton" >
-       <property name="text" >
-        <string>Test</string>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </widget>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <widget class="QLabel" name="deviceLabel">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+          <horstretch>1</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="text">
+         <string>Device</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QLabel" name="modeLabel">
+        <property name="text">
+         <string>Mode</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QComboBox" name="deviceBox"/>
+      </item>
+      <item row="1" column="1">
+       <widget class="QComboBox" name="modeBox"/>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="actualLabel">
+        <property name="frameShape">
+         <enum>QFrame::Panel</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <property name="text">
+         <string>Actual Settings</string>
+        </property>
+        <property name="alignment">
+         <set>Qt::AlignCenter</set>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QLabel" name="nearestLabel">
+        <property name="frameShape">
+         <enum>QFrame::Panel</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <property name="text">
+         <string>Nearest Settings</string>
+        </property>
+        <property name="alignment">
+         <set>Qt::AlignCenter</set>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="actualFreqLabel">
+        <property name="text">
+         <string>Frequency</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QLabel" name="nearestFreqLabel">
+        <property name="text">
+         <string>Frequency</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QComboBox" name="frequencyBox"/>
+      </item>
+      <item row="4" column="1">
+       <widget class="QLineEdit" name="nearestFreq"/>
+      </item>
+      <item row="5" column="0">
+       <widget class="QLabel" name="actualChannelsLabel">
+        <property name="text">
+         <string>Channels</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="1">
+       <widget class="QLabel" name="nearestChannelLabel">
+        <property name="text">
+         <string>Channel</string>
+        </property>
+       </widget>
+      </item>
+      <item row="6" column="0">
+       <widget class="QComboBox" name="channelsBox"/>
+      </item>
+      <item row="6" column="1">
+       <widget class="QLineEdit" name="nearestChannel"/>
+      </item>
+      <item row="7" column="0">
+       <widget class="QLabel" name="actualCodecLabel">
+        <property name="text">
+         <string>Codecs</string>
+        </property>
+       </widget>
+      </item>
+      <item row="7" column="1">
+       <widget class="QLabel" name="nearestCodecLabel">
+        <property name="text">
+         <string>Codec</string>
+        </property>
+       </widget>
+      </item>
+      <item row="8" column="0">
+       <widget class="QComboBox" name="codecsBox"/>
+      </item>
+      <item row="8" column="1">
+       <widget class="QLineEdit" name="nearestCodec"/>
+      </item>
+      <item row="9" column="0">
+       <widget class="QLabel" name="actualSampleSizeLabel">
+        <property name="text">
+         <string>SampleSize</string>
+        </property>
+       </widget>
+      </item>
+      <item row="9" column="1">
+       <widget class="QLabel" name="nearestSampleSizeLabel">
+        <property name="text">
+         <string>SampleSize</string>
+        </property>
+       </widget>
+      </item>
+      <item row="10" column="0">
+       <widget class="QComboBox" name="sampleSizesBox"/>
+      </item>
+      <item row="10" column="1">
+       <widget class="QLineEdit" name="nearestSampleSize"/>
+      </item>
+      <item row="11" column="0">
+       <widget class="QLabel" name="actualSampleTypeLabel">
+        <property name="text">
+         <string>SampleType</string>
+        </property>
+       </widget>
+      </item>
+      <item row="11" column="1">
+       <widget class="QLabel" name="nearestSampleTypeLabel">
+        <property name="text">
+         <string>SampleType</string>
+        </property>
+       </widget>
+      </item>
+      <item row="12" column="0">
+       <widget class="QComboBox" name="sampleTypesBox"/>
+      </item>
+      <item row="12" column="1">
+       <widget class="QLineEdit" name="nearestSampleType"/>
+      </item>
+      <item row="13" column="0">
+       <widget class="QLabel" name="actualEndianLabel">
+        <property name="text">
+         <string>Endianess</string>
+        </property>
+       </widget>
+      </item>
+      <item row="13" column="1">
+       <widget class="QLabel" name="nearestEndianLabel">
+        <property name="text">
+         <string>Endianess</string>
+        </property>
+       </widget>
+      </item>
+      <item row="14" column="0">
+       <widget class="QComboBox" name="endianBox"/>
+      </item>
+      <item row="14" column="1">
+       <widget class="QLineEdit" name="nearestEndian"/>
+      </item>
+      <item row="15" column="0" colspan="2">
+       <widget class="QTextEdit" name="logOutput">
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>40</height>
+         </size>
+        </property>
+       </widget>
+      </item>
+      <item row="16" column="0" colspan="2">
+       <widget class="QPushButton" name="testButton">
+        <property name="text">
+         <string>Test</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
   </widget>
-  <widget class="QMenuBar" name="menubar" >
-   <property name="geometry" >
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
     <rect>
      <x>0</x>
      <y>0</y>
      <width>504</width>
-     <height>28</height>
-    </rect>
-   </property>
-  </widget>
-  <widget class="QStatusBar" name="statusbar" >
-   <property name="geometry" >
-    <rect>
-     <x>0</x>
-     <y>681</y>
-     <width>504</width>
-     <height>21</height>
+     <height>19</height>
     </rect>
    </property>
   </widget>
+  <widget class="QStatusBar" name="statusbar"/>
  </widget>
  <resources/>
  <connections/>
diff --git a/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp b/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp
index 4ed1b41f46..c944cf0a1d 100644
--- a/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp
+++ b/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp
@@ -81,13 +81,18 @@ QAudioFormat QAudioDeviceInfoPrivate::preferredFormat() const
         nearest.setByteOrder(QAudioFormat::LittleEndian);
         nearest.setSampleType(QAudioFormat::SignedInt);
         nearest.setSampleSize(16);
-        nearest.setCodec(tr("audio/pcm"));
+        nearest.setCodec(QLatin1String("audio/pcm"));
     } else {
         nearest.setFrequency(8000);
         nearest.setChannels(1);
-        nearest.setSampleType(QAudioFormat::SignedInt);
+        nearest.setSampleType(QAudioFormat::UnSignedInt);
         nearest.setSampleSize(8);
-        nearest.setCodec(tr("audio/pcm"));
+        nearest.setCodec(QLatin1String("audio/pcm"));
+        if(!testSettings(nearest)) {
+            nearest.setChannels(2);
+            nearest.setSampleSize(16);
+            nearest.setSampleType(QAudioFormat::SignedInt);
+        }
     }
     return nearest;
 }
@@ -145,9 +150,9 @@ bool QAudioDeviceInfoPrivate::open()
 {
     int err = 0;
     QString dev = device;
-    if(!dev.contains(tr("default"))) {
+    if(!dev.contains(QLatin1String("default"))) {
         int idx = snd_card_get_index(dev.toLocal8Bit().constData());
-        dev = QString(tr("hw:%1,0")).arg(idx);
+        dev = QString(QLatin1String("hw:%1,0")).arg(idx);
     }
     if(mode == QAudio::AudioOutput) {
         err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
@@ -172,16 +177,15 @@ bool QAudioDeviceInfoPrivate::testSettings(const QAudioFormat& format) const
 {
     // Set nearest to closest settings that do work.
     // See if what is in settings will work (return value).
-
     int err = 0;
     snd_pcm_t* handle;
     snd_pcm_hw_params_t *params;
     QString dev = device;
 
     // open()
-    if(!dev.contains(tr("default"))) {
+    if(!dev.contains(QLatin1String("default"))) {
         int idx = snd_card_get_index(dev.toLocal8Bit().constData());
-        dev = QString(tr("hw:%1,0")).arg(idx);
+        dev = QString(QLatin1String("hw:%1,0")).arg(idx);
     }
     if(mode == QAudio::AudioOutput) {
         err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
@@ -205,8 +209,45 @@ bool QAudioDeviceInfoPrivate::testSettings(const QAudioFormat& format) const
     snd_pcm_hw_params_alloca( &params );
     snd_pcm_hw_params_any( handle, params );
 
+    // set the values!
+    snd_pcm_hw_params_set_channels(handle,params,format.channels());
+    snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
+    switch(format.sampleSize()) {
+        case 8:
+            if(format.sampleType() == QAudioFormat::SignedInt)
+                snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
+            else if(format.sampleType() == QAudioFormat::UnSignedInt)
+                snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
+            break;
+        case 16:
+            if(format.sampleType() == QAudioFormat::SignedInt) {
+                if(format.byteOrder() == QAudioFormat::LittleEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
+                else if(format.byteOrder() == QAudioFormat::BigEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
+            } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
+                if(format.byteOrder() == QAudioFormat::LittleEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
+                else if(format.byteOrder() == QAudioFormat::BigEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
+            }
+            break;
+        case 32:
+            if(format.sampleType() == QAudioFormat::SignedInt) {
+                if(format.byteOrder() == QAudioFormat::LittleEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
+                else if(format.byteOrder() == QAudioFormat::BigEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
+            } else if(format.sampleType() == QAudioFormat::UnSignedInt) {
+                if(format.byteOrder() == QAudioFormat::LittleEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
+                else if(format.byteOrder() == QAudioFormat::BigEndian)
+                    snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
+            }
+    }
+
     // For now, just accept only audio/pcm codec
-    if(!format.codec().startsWith(tr("audio/pcm"))) {
+    if(!format.codec().startsWith(QLatin1String("audio/pcm"))) {
         err=-1;
     } else
         testCodec = true;
@@ -313,7 +354,7 @@ void QAudioDeviceInfoPrivate::updateLists()
     typez.append(QAudioFormat::SignedInt);
     typez.append(QAudioFormat::UnSignedInt);
     typez.append(QAudioFormat::Float);
-    codecz.append(tr("audio/pcm"));
+    codecz.append(QLatin1String("audio/pcm"));
     close();
 }
 
@@ -346,10 +387,10 @@ QList<QByteArray> QAudioDeviceInfoPrivate::deviceList(QAudio::Mode mode)
             if(io == NULL)
                 _m = mode;
 
-            QString str = tr(name);
+            QString str = QLatin1String(name);
 
-            if(str.contains(tr("default"))) {
-                int pos = str.indexOf(tr("="),0);
+            if(str.contains(QLatin1String("default"))) {
+                int pos = str.indexOf(QLatin1String("="),0);
                 devices.append(str.mid(pos+1).toLocal8Bit().constData());
             }
         }
diff --git a/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp b/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
index 371f442b5d..ba9f5e26da 100644
--- a/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
+++ b/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
@@ -99,13 +99,13 @@ QAudioFormat QAudioDeviceInfoPrivate::preferredFormat() const
         nearest.setByteOrder(QAudioFormat::LittleEndian);
         nearest.setSampleType(QAudioFormat::SignedInt);
         nearest.setSampleSize(16);
-        nearest.setCodec(tr("audio/pcm"));
+        nearest.setCodec(QLatin1String("audio/pcm"));
     } else {
         nearest.setFrequency(11025);
         nearest.setChannels(1);
         nearest.setSampleType(QAudioFormat::SignedInt);
         nearest.setSampleSize(8);
-        nearest.setCodec(tr("audio/pcm"));
+        nearest.setCodec(QLatin1String("audio/pcm"));
     }
     return nearest;
 }
@@ -174,27 +174,25 @@ bool QAudioDeviceInfoPrivate::testSettings(const QAudioFormat& format) const
     // Set nearest to closest settings that do work.
     // See if what is in settings will work (return value).
 
-    bool testChannel = false;
-    bool testCodec = false;
-    bool testFreq = false;
-
-    int  err = 0;
+    bool failed = false;
 
     // For now, just accept only audio/pcm codec
-    if(!format.codec().startsWith(tr("audio/pcm"))) {
-        err=-1;
-    } else
-        testCodec = true;
+    if(!format.codec().startsWith(QLatin1String("audio/pcm")))
+        failed = true;
 
-    if(err>=0 && format.channels() != -1) {
-        testChannel = true;
-    }
+    if(!failed && !(format.channels() == 1 || format.channels() == 2))
+        failed = true;
 
-    if(err>=0 && format.frequency() != -1) {
-        testFreq = true;
+    if(!failed) {
+        if(!(format.frequency() == 8000 || format.frequency() == 11025 || format.frequency() == 22050 ||
+	   format.frequency() == 44100 || format.frequency() == 48000 || format.frequency() == 96000))
+	    failed = true;
     }
 
-    if(err == 0) {
+    if(!failed && !(format.sampleSize() == 8 || format.sampleSize() == 16))
+        failed = true;
+
+    if(!failed) {
         // settings work
         return true;
     }
@@ -209,7 +207,7 @@ void QAudioDeviceInfoPrivate::updateLists()
     DWORD fmt = NULL;
     QString tmp;
 
-    if(device.compare(tr("default")) == 0)
+    if(device.compare(QLatin1String("default")) == 0)
         base = true;
 
     if(mode == QAudio::AudioOutput) {
@@ -331,7 +329,7 @@ void QAudioDeviceInfoPrivate::updateLists()
 	typez.append(QAudioFormat::SignedInt);
 	typez.append(QAudioFormat::UnSignedInt);
 
-	codecz.append(tr("audio/pcm"));
+	codecz.append(QLatin1String("audio/pcm"));
     }
 }
 
diff --git a/src/multimedia/audio/qaudioinput_alsa_p.cpp b/src/multimedia/audio/qaudioinput_alsa_p.cpp
index c98102c69c..f36ffc853b 100644
--- a/src/multimedia/audio/qaudioinput_alsa_p.cpp
+++ b/src/multimedia/audio/qaudioinput_alsa_p.cpp
@@ -78,7 +78,7 @@ QAudioInputPrivate::QAudioInputPrivate(const QByteArray &device, const QAudioFor
     pullMode = true;
     resuming = false;
 
-    QStringList list1 = QString(tr(device)).split(tr(":"));
+    QStringList list1 = QString(QLatin1String(device)).split(QLatin1String(":"));
     m_device = QByteArray(list1.at(0).toLocal8Bit().constData());
 
     timer = new QTimer(this);
@@ -254,9 +254,9 @@ bool QAudioInputPrivate::open()
     int count=0;
     unsigned int freakuency=settings.frequency();
 
-    QString dev = QString(tr(m_device.constData()));
-    if(!dev.contains(tr("default"))) {
-        dev = QString(tr("default:CARD=%1")).arg(tr(m_device.constData()));
+    QString dev = QString(QLatin1String(m_device.constData()));
+    if(!dev.contains(QLatin1String("default"))) {
+        dev = QString(QLatin1String("default:CARD=%1")).arg(QLatin1String(m_device.constData()));
     }
 
     // Step 1: try and open the device
diff --git a/src/multimedia/audio/qaudioinput_win32_p.cpp b/src/multimedia/audio/qaudioinput_win32_p.cpp
index 315a59bf07..31441ae360 100644
--- a/src/multimedia/audio/qaudioinput_win32_p.cpp
+++ b/src/multimedia/audio/qaudioinput_win32_p.cpp
@@ -245,7 +245,7 @@ bool QAudioInputPrivate::open()
 	    == MMSYSERR_NOERROR) {
 	    QString tmp;
 	    tmp = QString::fromUtf16((const unsigned short*)wic.szPname);
-	    if(tmp.compare(tr(m_device)) == 0) {
+	    if(tmp.compare(QLatin1String(m_device)) == 0) {
 	        devId = ii;
 		break;
 	    }
diff --git a/src/multimedia/audio/qaudiooutput_alsa_p.cpp b/src/multimedia/audio/qaudiooutput_alsa_p.cpp
index 45ff115fa0..e8a3f5c97c 100644
--- a/src/multimedia/audio/qaudiooutput_alsa_p.cpp
+++ b/src/multimedia/audio/qaudiooutput_alsa_p.cpp
@@ -81,7 +81,7 @@ QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device, const QAudioF
     resuming = false;
     opened = false;
 
-    QStringList list1 = QString(tr(device)).split(tr(":"));
+    QStringList list1 = QString(QLatin1String(device)).split(QLatin1String(":"));
     m_device = QByteArray(list1.at(0).toLocal8Bit().constData());
 
     timer = new QTimer(this);
@@ -277,9 +277,9 @@ bool QAudioOutputPrivate::open()
     int count=0;
     unsigned int freakuency=settings.frequency();
 
-    QString dev = tr(m_device.constData());
-    if(!dev.contains(tr("default"))) {
-        dev = QString(tr("default:CARD=%1")).arg(tr(m_device.constData()));
+    QString dev = QLatin1String(m_device.constData());
+    if(!dev.contains(QLatin1String("default"))) {
+        dev = QString(QLatin1String("default:CARD=%1")).arg(QLatin1String(m_device.constData()));
     }
     // Step 1: try and open the device
     while((count < 5) && (err < 0)) {
diff --git a/src/multimedia/audio/qaudiooutput_win32_p.cpp b/src/multimedia/audio/qaudiooutput_win32_p.cpp
index fae680c0f5..aea3a3f63e 100644
--- a/src/multimedia/audio/qaudiooutput_win32_p.cpp
+++ b/src/multimedia/audio/qaudiooutput_win32_p.cpp
@@ -241,7 +241,7 @@ bool QAudioOutputPrivate::open()
 	    == MMSYSERR_NOERROR) {
 	    QString tmp;
 	    tmp = QString::fromUtf16((const unsigned short*)woc.szPname);
-            if(tmp.compare(tr(m_device)) == 0) {
+            if(tmp.compare(QLatin1String(m_device)) == 0) {
 	        devId = ii;
 		break;
 	    }