diff -r 41300fa6a67c -r f7bc934e204c src/multimedia/audio/qaudioinput.cpp
--- a/src/multimedia/audio/qaudioinput.cpp	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/multimedia/audio/qaudioinput.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -95,7 +95,7 @@
       format.setByteOrder(QAudioFormat::LittleEndian);
       format.setSampleType(QAudioFormat::UnSignedInt);
 
-      if (QAudioDeviceInfo info(QAudioDeviceInfo::defaultInputDevice());
+      QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice();
       if (!info.isFormatSupported(format)) {
           qWarning()<<"default format not supported try to use nearest";
           format = info.nearestFormat(format);
@@ -103,7 +103,7 @@
 
       audio = new QAudioInput(format, this);
       QTimer::singleShot(3000, this, SLOT(stopRecording()));
-      audio->start(outputFile);
+      audio->start(&outputFile);
       // Records audio for 3000ms
     }
     \endcode
@@ -190,18 +190,18 @@
      Passing a QIODevice allows the data to be transfered without any extra code.
      All that is required is to open the QIODevice.
 
+     If able to successfully get audio data from the systems audio device the
+     state() is set to either QAudio::ActiveState or QAudio::IdleState,
+     error() is set to QAudio::NoError and the stateChanged() signal is emitted.
+
+     If a problem occurs during this process the error() is set to QAudio::OpenError,
+     state() is set to QAudio::StoppedState and stateChanged() signal is emitted.
+
      \sa QIODevice
 */
 
 void QAudioInput::start(QIODevice* device)
 {
-    /*
-       -If currently not StoppedState, stop
-       -If previous start was push mode, delete internal QIODevice.
-       -open audio input.
-       If ok, NoError and ActiveState, else OpenError and StoppedState.
-       -emit stateChanged()
-    */
     d->start(device);
 }
 
@@ -210,19 +210,18 @@
     transfer. This QIODevice can be used to read() audio data
     directly.
 
+    If able to access the systems audio device the state() is set to
+    QAudio::IdleState, error() is set to QAudio::NoError
+    and the stateChanged() signal is emitted.
+
+    If a problem occurs during this process the error() is set to QAudio::OpenError,
+    state() is set to QAudio::StoppedState and stateChanged() signal is emitted.
+
     \sa QIODevice
 */
 
 QIODevice* QAudioInput::start()
 {
-    /*
-    -If currently not StoppedState, stop
-    -If no internal QIODevice, create one.
-    -open audio input.
-    -If ok, NoError and IdleState, else OpenError and StoppedState
-    -emit stateChanged()
-    -return internal QIODevice
-    */
     return d->start(0);
 }
 
@@ -236,17 +235,14 @@
 }
 
 /*!
-    Stops the audio input.
+    Stops the audio input, detaching from the system resource.
+
+    Sets error() to QAudio::NoError, state() to QAudio::StoppedState and
+    emit stateChanged() signal.
 */
 
 void QAudioInput::stop()
 {
-    /*
-    -If StoppedState, return
-    -set to StoppedState
-    -detach from audio device
-    -emit stateChanged()
-    */
     d->stop();
 }
 
@@ -256,42 +252,32 @@
 
 void QAudioInput::reset()
 {
-    /*
-    -drop all buffered audio, set buffers to zero.
-    -call stop()
-    */
     d->reset();
 }
 
 /*!
     Stops processing audio data, preserving buffered audio data.
+
+    Sets error() to QAudio::NoError, state() to QAudio::SuspendedState and
+    emit stateChanged() signal.
 */
 
 void QAudioInput::suspend()
 {
-    /*
-    -If not ActiveState|IdleState, return
-    -stop processing audio, saving all buffered audio data
-    -set NoError and SuspendedState
-    -emit stateChanged()
-    */
     d->suspend();
 }
 
 /*!
     Resumes processing audio data after a suspend().
+
+    Sets error() to QAudio::NoError.
+    Sets state() to QAudio::ActiveState if you previously called start(QIODevice*).
+    Sets state() to QAudio::IdleState if you previously called start().
+    emits stateChanged() signal.
 */
 
 void QAudioInput::resume()
 {
-    /*
-    -If SuspendedState, return
-    -resume audio
-    -(PULL MODE): set ActiveState, NoError
-    -(PUSH MODE): set IdleState, NoError
-    -kick start audio if needed
-    -emit stateChanged()
-    */
      d->resume();
 }
 
@@ -327,6 +313,9 @@
 
 /*!
     Returns the amount of audio data available to read in bytes.
+
+    NOTE: returned value is only valid while in QAudio::ActiveState or QAudio::IdleState
+    state, otherwise returns zero.
 */
 
 int QAudioInput::bytesReady() const
@@ -352,7 +341,10 @@
 /*!
     Sets the interval for notify() signal to be emitted.
     This is based on the \a ms of audio data processed
-    not on actual real-time. The resolution of the timer is platform specific.
+    not on actual real-time.
+    The minimum resolution of the timer is platform specific and values
+    should be checked with notifyInterval() to confirm actual value
+    being used.
 */
 
 void QAudioInput::setNotifyInterval(int ms)