Fix some failing QAudioInput integration tests on OSX.

This also meant implementing software volume support, and since
this is the last backend to do so, make that interface pure
virtual again.

In some cases the test needed tweaks.

Change-Id: Ie429863f187b43802cdd4f16d841929e0cb0e729
Reviewed-by: Kurt Korbatits  <kurt.korbatits@nokia.com>
Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>

src/multimedia/audio/qaudiodevicefactory.cpp

@@ -106,6 +106,8 @@ public:
     QAudio::State state() const { return QAudio::StoppedState; }
     void setFormat(const QAudioFormat&) {}
     QAudioFormat format() const { return QAudioFormat(); }
+    void setVolume(qreal) {}
+    qreal volume() const {return 1.0f;}
 };
 
 class QNullOutputDevice : public QAbstractAudioOutput

src/multimedia/audio/qaudioinput_mac_p.cpp

@@ -59,6 +59,7 @@
 #include "qaudio_mac_p.h"
 #include "qaudioinput_mac_p.h"
 #include "qaudiodeviceinfo_mac_p.h"
+#include "qaudiohelpers_p.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -235,7 +236,8 @@ public:
         m_deviceError(false),
         m_audioConverter(0),
         m_inputFormat(inputFormat),
-        m_outputFormat(outputFormat)
+        m_outputFormat(outputFormat),
+        m_volume(qreal(1.0f))
     {
         m_maxPeriodSize = maxPeriodSize;
         m_periodTime = m_maxPeriodSize / m_outputFormat.mBytesPerFrame * 1000 / m_outputFormat.mSampleRate;
@@ -253,6 +255,8 @@ public:
                 m_audioConverter = 0;
             }
         }
+
+        m_qFormat = toQAudioFormat(inputFormat); // we adjust volume before conversion
     }
 
     ~QAudioInputBuffer()
@@ -260,6 +264,16 @@ public:
         delete m_buffer;
     }
 
+    qreal volume() const
+    {
+        return m_volume;
+    }
+
+    void setVolume(qreal v)
+    {
+        m_volume = v;
+    }
+
     qint64 renderFromDevice(AudioUnit audioUnit,
                              AudioUnitRenderActionFlags* ioActionFlags,
                              const AudioTimeStamp* inTimeStamp,
@@ -279,6 +293,15 @@ public:
                                 inNumberFrames,
                                 m_inputBufferList->audioBufferList());
 
+        // adjust volume, if necessary
+        if (!qFuzzyCompare(m_volume, qreal(1.0f))) {
+            QAudioHelperInternal::qMultiplySamples(m_volume,
+                                                   m_qFormat,
+                                                   m_inputBufferList->data(), /* input */
+                                                   m_inputBufferList->data(), /* output */
+                                                   m_inputBufferList->bufferSize());
+        }
+
         if (m_audioConverter != 0) {
             QAudioPacketFeeder  feeder(m_inputBufferList);
 
@@ -452,6 +475,8 @@ private:
     AudioConverterRef   m_audioConverter;
     AudioStreamBasicDescription m_inputFormat;
     AudioStreamBasicDescription m_outputFormat;
+    QAudioFormat m_qFormat;
+    qreal     m_volume;
 
     const static OSStatus as_empty = 'qtem';
 
@@ -535,6 +560,8 @@ QAudioInputPrivate::QAudioInputPrivate(const QByteArray& device)
         errorCode = QAudio::NoError;
         stateCode = QAudio::StoppedState;
 
+        m_volume = qreal(1.0f);
+
         intervalTimer = new QTimer(this);
         intervalTimer->setInterval(1000);
         connect(intervalTimer, SIGNAL(timeout()), SIGNAL(notify()));
@@ -709,6 +736,7 @@ bool QAudioInputPrivate::open()
                                         streamFormat,
                                         this);
 
+    audioBuffer->setVolume(m_volume);
     audioIO = new QtMultimediaInternal::MacInputDevice(audioBuffer, this);
 
     // Init
@@ -765,11 +793,11 @@ void QAudioInputPrivate::start(QIODevice* device)
     startTime = AudioGetCurrentHostTime();
     totalFrames = 0;
 
-    audioThreadStart();
-
-    stateCode = QAudio::ActiveState;
+    stateCode = QAudio::IdleState;
     errorCode = QAudio::NoError;
     emit stateChanged(stateCode);
+
+    audioThreadStart();
 }
 
 QIODevice* QAudioInputPrivate::start()
@@ -793,12 +821,12 @@ QIODevice* QAudioInputPrivate::start()
     startTime = AudioGetCurrentHostTime();
     totalFrames = 0;
 
-    audioThreadStart();
-
-    stateCode = QAudio::ActiveState;
+    stateCode = QAudio::IdleState;
     errorCode = QAudio::NoError;
     emit stateChanged(stateCode);
 
+    audioThreadStart();
+
     return op;
 }
 
@@ -823,6 +851,7 @@ void QAudioInputPrivate::reset()
 
         errorCode = QAudio::NoError;
         stateCode = QAudio::StoppedState;
+        audioBuffer->reset();
         QMetaObject::invokeMethod(this, "stateChanged", Qt::QueuedConnection, Q_ARG(QAudio::State, stateCode));
     }
 }
@@ -853,6 +882,8 @@ void QAudioInputPrivate::resume()
 
 int QAudioInputPrivate::bytesReady() const
 {
+    if (!audioBuffer)
+        return 0;
     return audioBuffer->used();
 }
 
@@ -910,6 +941,19 @@ QAudio::State QAudioInputPrivate::state() const
     return stateCode;
 }
 
+qreal QAudioInputPrivate::volume() const
+{
+    return m_volume;
+}
+
+void QAudioInputPrivate::setVolume(qreal volume)
+{
+    m_volume = volume;
+    if (audioBuffer)
+        audioBuffer->setVolume(m_volume);
+}
+
+
 void QAudioInputPrivate::audioThreadStop()
 {
     stopTimers();
@@ -931,15 +975,22 @@ void QAudioInputPrivate::audioDeviceStop()
     threadFinished.wakeOne();
 }
 
+void QAudioInputPrivate::audioDeviceActive()
+{
+    QMutexLocker    lock(&mutex);
+    if (stateCode == QAudio::IdleState) {
+        stateCode = QAudio::ActiveState;
+        QMetaObject::invokeMethod(this, "stateChanged",  Qt::QueuedConnection, Q_ARG(QAudio::State, stateCode));
+    }
+}
+
 void QAudioInputPrivate::audioDeviceFull()
 {
     QMutexLocker    lock(&mutex);
     if (stateCode == QAudio::ActiveState) {
-        audioDeviceStop();
-
         errorCode = QAudio::UnderrunError;
         stateCode = QAudio::IdleState;
-        QMetaObject::invokeMethod(this, "deviceStopped", Qt::QueuedConnection);
+        QMetaObject::invokeMethod(this, "stateChanged",  Qt::QueuedConnection, Q_ARG(QAudio::State, stateCode));
     }
 }
 
@@ -998,9 +1049,10 @@ OSStatus QAudioInputPrivate::inputCallback(void* inRefCon,
                                                          inBusNumber,
                                                          inNumberFrames);
 
-        if (framesWritten > 0)
+        if (framesWritten > 0) {
             d->totalFrames += framesWritten;
-        else if (framesWritten == 0)
+            d->audioDeviceActive();
+        } else if (framesWritten == 0)
             d->audioDeviceFull();
         else if (framesWritten < 0)
             d->audioDeviceError();

src/multimedia/audio/qaudioinput_mac_p.h

@@ -109,6 +109,7 @@ public:
     AudioStreamBasicDescription streamFormat;
     AudioStreamBasicDescription deviceFormat;
     QAbstractAudioDeviceInfo *audioDeviceInfo;
+    qreal           m_volume;
 
     QAudioInputPrivate(const QByteArray& device);
     ~QAudioInputPrivate();
@@ -142,10 +143,14 @@ public:
     QAudio::Error error() const;
     QAudio::State state() const;
 
+    qreal volume() const;
+    void setVolume(qreal volume);
+
     void audioThreadStart();
     void audioThreadStop();
 
     void audioDeviceStop();
+    void audioDeviceActive();
     void audioDeviceFull();
     void audioDeviceError();
 

src/multimedia/audio/qaudiosystem.h

@@ -131,8 +131,8 @@ public:
     virtual QAudio::State state() const = 0;
     virtual void setFormat(const QAudioFormat& fmt) = 0;
     virtual QAudioFormat format() const = 0;
-    virtual void setVolume(qreal) {}
-    virtual qreal volume() const { return 1.0; }
+    virtual void setVolume(qreal) = 0;
+    virtual qreal volume() const = 0;
 
 Q_SIGNALS:
     void errorChanged(QAudio::Error);