Merge branch 'qt-4.7-from-4.6' of scm.dev.nokia.troll.no:qt/qt-integration into 4.7-integration

* 'qt-4.7-from-4.6' of scm.dev.nokia.troll.no:qt/qt-integration: (48 commits)
  Remove test cases which cause stack overflow
  Avoid a crash in the OpenVG paint engine when clipping to an empty path
  Fix last character being overwritten in password field
  Updated WebKit from /home/shausman/src/webkit/trunk to qtwebkit/qtwebkit-4.6 ( 038b62085831eef4dee423361c65ecd55b7b9b1d )
  QSslSocket: Improve error handling
  Compile when bootstrapping qmake
  Fix regression in tst_qrand::testqrand()
  syncqt: don't try to split %module's values
  syncqt: fix wrong paths in include/ActiveQt/headers.pri
  Fix a crash when recursing into QSharedPointer from QSharedPointer::clear()
  Fix a couple of memory leaks due to not releasing CFTypes on Mac
  Initalize the nativeDialogInUse variable
  The Q_WGL define was removed years ago.
  Compile
  QUUid::createUuid() should not generate identical sequences on UNIX
  typos fixed
  Use lower case for including system header files
  Added trace statements to Phonon MMF backend
  Fix crash when removing columns in merged row
  MMF Phonon backend: call winId() from VideoWidget constructor
  ...

1 files changed, 39 insertions, 15 deletions

diff --git a/src/multimedia/audio/qaudioinput_alsa_p.cpp b/src/multimedia/audio/qaudioinput_alsa_p.cpp
index c9a8b71..58669b3 100644
--- a/src/multimedia/audio/qaudioinput_alsa_p.cpp
+++ b/src/multimedia/audio/qaudioinput_alsa_p.cpp
@@ -120,7 +120,7 @@ int QAudioInputPrivate::xrun_recovery(int err)
         if(err < 0)
             reset = true;
         else {
-            bytesAvailable = bytesReady();
+            bytesAvailable = checkBytesReady();
             if (bytesAvailable <= 0)
                 reset = true;
         }
@@ -408,7 +408,7 @@ bool QAudioInputPrivate::open()
     snd_pcm_start(handle);
 
     // Step 5: Setup timer
-    bytesAvailable = bytesReady();
+    bytesAvailable = checkBytesReady();
 
     if(pullMode)
         connect(audioSource,SIGNAL(readyRead()),this,SLOT(userFeed()));
@@ -437,19 +437,29 @@ void QAudioInputPrivate::close()
     }
 }
 
-int QAudioInputPrivate::bytesReady() const
+int QAudioInputPrivate::checkBytesReady()
 {
     if(resuming)
-        return period_size;
-
-    if(deviceState != QAudio::ActiveState && deviceState != QAudio::IdleState)
-        return 0;
-    int frames = snd_pcm_avail_update(handle);
-    if (frames < 0) return frames;
-    if((int)frames > (int)buffer_frames)
-        frames = buffer_frames;
+        bytesAvailable = period_size;
+    else if(deviceState != QAudio::ActiveState
+            && deviceState != QAudio::IdleState)
+        bytesAvailable = 0;
+    else {
+        int frames = snd_pcm_avail_update(handle);
+        if (frames < 0) {
+            bytesAvailable = frames;
+        } else {
+            if((int)frames > (int)buffer_frames)
+                frames = buffer_frames;
+            bytesAvailable = snd_pcm_frames_to_bytes(handle, frames);
+        }
+    }
+    return bytesAvailable;
+}
 
-    return snd_pcm_frames_to_bytes(handle, frames);
+int QAudioInputPrivate::bytesReady() const
+{
+    return qMax(bytesAvailable, 0);
 }
 
 qint64 QAudioInputPrivate::read(char* data, qint64 len)
@@ -460,12 +470,12 @@ qint64 QAudioInputPrivate::read(char* data, qint64 len)
     if ( !handle )
         return 0;
 
-    bytesAvailable = bytesReady();
+    bytesAvailable = checkBytesReady();
 
     if (bytesAvailable < 0) {
         // bytesAvailable as negative is error code, try to recover from it.
         xrun_recovery(bytesAvailable);
-        bytesAvailable = bytesReady();
+        bytesAvailable = checkBytesReady();
         if (bytesAvailable < 0) {
             // recovery failed must stop and set error.
             close();
@@ -639,11 +649,25 @@ bool QAudioInputPrivate::deviceReady()
         InputPrivate* a = qobject_cast<InputPrivate*>(audioSource);
         a->trigger();
     }
-    bytesAvailable = bytesReady();
+    bytesAvailable = checkBytesReady();
 
     if(deviceState != QAudio::ActiveState)
         return true;
 
+    if (bytesAvailable < 0) {
+        // bytesAvailable as negative is error code, try to recover from it.
+        xrun_recovery(bytesAvailable);
+        bytesAvailable = checkBytesReady();
+        if (bytesAvailable < 0) {
+            // recovery failed must stop and set error.
+            close();
+            errorState = QAudio::IOError;
+            deviceState = QAudio::StoppedState;
+            emit stateChanged(deviceState);
+            return 0;
+        }
+    }
+
     if(intervalTime && (timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
         emit notify();
         elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;