bug fix with sound card device selection, show red text if actual sound card buffer size differs from preffered value

linux/sound.h

@@ -58,7 +58,7 @@ public:
     // not implemented yet, always return one device and default string
     int         GetNumDev() { return 1; }
     std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
-    int         SetDev ( const int iNewDev ) {} // dummy
+    std::string SetDev ( const int iNewDev ) { return ""; } // dummy
     int         GetDev() { return 0; }
 
     virtual int  Init  ( const int iNewPrefMonoBufferSize );
@@ -85,7 +85,7 @@ public:
     // not implemented yet, always return one device and default string
     int         GetNumDev() { return 1; }
     std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
-    int         SetDev ( const int iNewDev ) {} // dummy
+    std::string SetDev ( const int iNewDev ) { return ""; } // dummy
     int         GetDev() { return 0; }
 
     virtual int Init ( const int iNewPrefMonoBufferSize )
@@ -136,7 +136,7 @@ public:
     // not used
     int         GetNumDev() { return 1; }
     std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
-    int         SetDev ( const int iNewDev ) {} // dummy
+    std::string SetDev ( const int iNewDev ) { return ""; } // dummy
     int         GetDev() { return 0; }
 
     // dummy definitions

src/client.cpp

@@ -181,7 +181,7 @@ void CClient::SetSndCrdPreferredMonoBlSizeIndex ( const int iNewIdx )
     Channel.CreateNetTranspPropsMessFromCurrentSettings();
 }
 
-void CClient::SetSndCrdDev ( const int iNewDev )
+QString CClient::SetSndCrdDev ( const int iNewDev )
 {
     // if client was running then first
     // stop it and restart again after new initialization
@@ -191,7 +191,7 @@ void CClient::SetSndCrdDev ( const int iNewDev )
         Sound.Stop();
     }
 
-    Sound.SetDev ( iNewDev );
+    const QString strReturn = Sound.SetDev ( iNewDev ).c_str();
 
     // init again because the sound card actual buffer size might
     // be changed on new device
@@ -201,6 +201,8 @@ void CClient::SetSndCrdDev ( const int iNewDev )
     {
         Sound.Start();
     }
+
+    return strReturn;
 }
 
 void CClient::Start()

src/client.h

@@ -120,7 +120,7 @@ public:
     std::string  GetSndCrdDeviceName ( const int iDiD )
         { return Sound.GetDeviceName ( iDiD ); }
 
-    void         SetSndCrdDev ( const int iNewDev );
+    QString      SetSndCrdDev ( const int iNewDev );
     int          GetSndCrdDev() { return Sound.GetDev(); }
     void         OpenSndCrdDriverSetup() { Sound.OpenDriverSetup(); }
 

src/clientsettingsdlg.cpp

@@ -165,20 +165,33 @@ void CClientSettingsDlg::UpdateSoundCardFrame()
 {
     // update slider value and text
     const int iCurPrefBufIdx    = pClient->GetSndCrdPreferredMonoBlSizeIndex();
-    const int iCurActualBufIdx = pClient->GetSndCrdActualMonoBlSize();
+    const int iCurActualBufSize = pClient->GetSndCrdActualMonoBlSize();
     SliderSndCrdBufferDelay->setValue ( iCurPrefBufIdx );
 
     // preferred size
-    TextLabelPreferredSndCrdBufDelay->setText (
+    const int iPrefBufSize =
-        QString().setNum ( (double) CSndCrdBufferSizes::GetBufferSizeFromIndex ( iCurPrefBufIdx ) *
+        CSndCrdBufferSizes::GetBufferSizeFromIndex ( iCurPrefBufIdx );
-        1000 / SND_CRD_SAMPLE_RATE, 'f', 2 ) + " ms (" +
-        QString().setNum ( CSndCrdBufferSizes::GetBufferSizeFromIndex ( iCurPrefBufIdx ) ) + ")" );
 
-    // actual size
+    TextLabelPreferredSndCrdBufDelay->setText (
-    TextLabelActualSndCrdBufDelay->setText (
+        QString().setNum ( (double) iPrefBufSize *
-        QString().setNum ( (double) iCurActualBufIdx *
         1000 / SND_CRD_SAMPLE_RATE, 'f', 2 ) + " ms (" +
-        QString().setNum ( iCurActualBufIdx ) + ")" );
+        QString().setNum ( iPrefBufSize ) + ")" );
+
+    // actual size (use yellow color if different from preferred size)
+    const QString strActSizeValues =
+        QString().setNum ( (double) iCurActualBufSize *
+        1000 / SND_CRD_SAMPLE_RATE, 'f', 2 ) + " ms (" +
+        QString().setNum ( iCurActualBufSize ) + ")";
+
+    if ( iPrefBufSize != iCurActualBufSize )
+    {
+        TextLabelActualSndCrdBufDelay->setText ( "<font color=""red"">" +
+            strActSizeValues + "</font>" );
+    }
+    else
+    {
+        TextLabelActualSndCrdBufDelay->setText ( strActSizeValues );
+    }
 }
 
 void CClientSettingsDlg::showEvent ( QShowEvent* showEvent )
@@ -214,15 +227,13 @@ void CClientSettingsDlg::OnSliderSndCrdBufferDelay ( int value )
 
 void CClientSettingsDlg::OnSoundCrdSelection ( int iSndDevIdx )
 {
-    try
+    const QString strError = pClient->SetSndCrdDev ( iSndDevIdx );
-    {
+
-        pClient->SetSndCrdDev ( iSndDevIdx );
+    if ( !strError.isEmpty() )
-    }
-    catch ( CGenErr generr )
     {
         QMessageBox::critical ( 0, APP_NAME,
             QString ( "The selected audio device could not be used because "
-            "of the following error: " ) + generr.GetErrorText() +
+            "of the following error: " ) + strError +
             QString ( " The previous driver will be selected." ), "Ok", 0 );
 
         // recover old selection

windows/sound.cpp

@@ -57,8 +57,10 @@ CSound* pSound;
 /******************************************************************************\
 * Common                                                                       *
 \******************************************************************************/
-void CSound::SetDev ( const int iNewDev )
+std::string CSound::SetDev ( const int iNewDev )
 {
+    std::string strReturn = ""; // init with no error
+
     // check if an ASIO driver was already initialized
     if ( lCurDev >= 0 )
     {
@@ -77,9 +79,9 @@ void CSound::SetDev ( const int iNewDev )
             // loading and initializing the new driver failed, go back to
             // original driver and display error message
             LoadAndInitializeDriver ( lCurDev );
-            Init ( iASIOBufferSizeStereo );
 
-            throw CGenErr ( strErrorMessage.c_str() );
+            // store error return message
+            strReturn = strErrorMessage;
         }
 
         Init ( iASIOBufferSizeStereo );
@@ -114,6 +116,8 @@ void CSound::SetDev ( const int iNewDev )
             }
         }
     }
+
+    return strReturn;
 }
 
 bool CSound::LoadAndInitializeFirstValidDriver()

windows/sound.h

@@ -68,7 +68,7 @@ public:
     int          GetNumDev() { return lNumDevs; }
     std::string  GetDeviceName ( const int iDiD ) { return cDriverNames[iDiD]; }
 
-    void         SetDev ( const int iNewDev );
+    std::string  SetDev ( const int iNewDev );
     int          GetDev() { return lCurDev; }
 
 protected: