GTK : Added an option to allow a sound sample rate of 48 000 Hz (finally ...)

src/Sound.cpp

@@ -40,7 +40,7 @@ extern bool stopState;      // TODO: silence sound when true
 
 int const SOUND_CLOCK_TICKS_ = 167772; // 1/100 second
 
-static u16   soundFinalWave [1470];
+static u16   soundFinalWave [1600];
 long  soundSampleRate    = 44100;
 bool  soundInterpolation = true;
 bool  soundPaused        = true;

src/common/SoundSDL.cpp

@@ -98,7 +98,7 @@ bool SoundSDL::init(long sampleRate)
 {
   SDL_AudioSpec audio;
 
-  _bufferLen = sampleRate / 15;
+  _bufferLen = sampleRate * 4 / 60;
 
   audio.freq = sampleRate;
   audio.format = AUDIO_S16SYS;

src/gtk/soundconfig.cpp

@@ -60,15 +60,18 @@ void SoundConfigDialog::vSetConfig(Config::Section * _poConfig, VBA::Window * _p
   long iSoundSampleRate = m_poConfig->oGetKey<long>("sample_rate");
   switch (iSoundSampleRate)
   {
-    default:
-    case 44100:
-      m_poRateComboBox->set_active(2);
+    case 11025:
+      m_poRateComboBox->set_active(0);
       break;
     case 22050:
       m_poRateComboBox->set_active(1);
       break;
-    case 11025:
-      m_poRateComboBox->set_active(0);
+    default:
+    case 44100:
+      m_poRateComboBox->set_active(2);
+      break;
+    case 48000:
+      m_poRateComboBox->set_active(3);
       break;
   }
 }
@@ -120,6 +123,9 @@ void SoundConfigDialog::vOnRateChanged()
     default:
       m_poConfig->vSetKey("sample_rate", 44100);
       break;
+    case 3: // 48 KHz
+      m_poConfig->vSetKey("sample_rate", 48000);
+      break;
   }
 
   m_poWindow->vApplyConfigSoundSampleRate();

src/gtk/ui/sound.ui

@@ -35,7 +35,10 @@
         <col id="0">22 KHz</col>
       </row>
       <row>
-        <col id="0">44 KHz</col>
+        <col id="0">44.1 KHz</col>
+      </row>
+      <row>
+        <col id="0">48 KHz</col>
       </row>
     </data>
   </object>

src/gtk/window.cpp

@@ -92,7 +92,7 @@ Window::Window(GtkWindow * _pstWindow, const Glib::RefPtr<Xml> & _poXml) :
   m_iSaveTypeMin    (SaveAuto),
   m_iSaveTypeMax    (SaveNone),
   m_iSoundSampleRateMin(11025),
-  m_iSoundSampleRateMax(44100),
+  m_iSoundSampleRateMax(48000),
   m_fSoundVolumeMin (0.50f),
   m_fSoundVolumeMax (2.00f),
   m_iEmulatorTypeMin(EmulatorAuto),