Merge branch '4.6' of scm.dev.nokia.troll.no:qt/berlin-staging-1 into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/berlin-staging-1:
  Fix precision loss warning (qreal vs. float on Windows)
  def file maintenance.
  def file maintenance.
  Fixed compile for S60 (.def file updates).
  QPlainTextEdit scrolling issue with folded paragraphs
  Designer: Show actions in action editor in QKeySequence::NativeText
  Fix up documentation examples for low-level audio.
  Add -audio-backend and -no-audio-backend configure option.
  audioinput and audiooutput examples not using isFormatSupported
  Qt fails to build on RHEL 4 and other older Linux versions because of

2 files changed, 23 insertions, 1 deletions

diff --git a/examples/multimedia/audioinput/audioinput.cpp b/examples/multimedia/audioinput/audioinput.cpp
index 62afd73..75bddd6 100644
--- a/examples/multimedia/audioinput/audioinput.cpp
+++ b/examples/multimedia/audioinput/audioinput.cpp
@@ -195,7 +195,6 @@ InputTest::InputTest()
 
     pullMode = true;
 
-    // AudioInfo class only supports mono S16LE samples!
     format.setFrequency(8000);
     format.setChannels(1);
     format.setSampleSize(16);
@@ -203,6 +202,17 @@ InputTest::InputTest()
     format.setByteOrder(QAudioFormat::LittleEndian);
     format.setCodec("audio/pcm");
 
+    QAudioDeviceInfo info(QAudioDeviceInfo::defaultInputDevice());
+    if (!info.isFormatSupported(format)) {
+        qWarning()<<"default format not supported try to use nearest";
+        format = info.nearestFormat(format);
+    }
+
+    if(format.sampleSize() != 16) {
+        qWarning()<<"audio device doesn't support 16 bit samples, example cannot run";
+        return;
+    }
+
     audioInput = new QAudioInput(format,this);
     connect(audioInput,SIGNAL(notify()),SLOT(status()));
     connect(audioInput,SIGNAL(stateChanged(QAudio::State)),SLOT(state(QAudio::State)));
diff --git a/examples/multimedia/audiooutput/audiooutput.cpp b/examples/multimedia/audiooutput/audiooutput.cpp
index 244840d..b6047db 100644
--- a/examples/multimedia/audiooutput/audiooutput.cpp
+++ b/examples/multimedia/audiooutput/audiooutput.cpp
@@ -170,6 +170,18 @@ AudioTest::AudioTest()
     settings.setCodec("audio/pcm");
     settings.setByteOrder(QAudioFormat::LittleEndian);
     settings.setSampleType(QAudioFormat::SignedInt);
+
+    QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
+    if (!info.isFormatSupported(settings)) {
+        qWarning()<<"default format not supported try to use nearest";
+        settings = info.nearestFormat(settings);
+    }
+
+    if(settings.sampleSize() != 16) {
+        qWarning()<<"audio device doesn't support 16 bit samples, example cannot run";
+        return;
+    }
+
     audioOutput = new QAudioOutput(settings,this);
     connect(audioOutput,SIGNAL(notify()),SLOT(status()));
     connect(audioOutput,SIGNAL(stateChanged(QAudio::State)),SLOT(state(QAudio::State)));