Do necessary COM thread initializations for ASIO audio

map65/main.cpp

@@ -19,7 +19,7 @@ int main(int argc, char *argv[])
   QApplication a {argc, argv};
   // Override programs executable basename as application name.
   a.setApplicationName ("MAP65");
-  a.setApplicationVersion ("3.0.0-rc1");
+  a.setApplicationVersion ("3.0.0-devel");
   // switch off as we share an Info.plist file with WSJT-X
   a.setAttribute (Qt::AA_DontUseNativeMenuBar);
   MainWindow w;

map65/soundin.cpp

@@ -1,12 +1,19 @@
 #include "soundin.h"
-#include <stdexcept>
+
+#ifdef Q_OS_WIN32
+#include <windows.h>
+#else
+#include <sys/socket.h>
+#endif
 
 #define NFFT 32768
 #define FRAMES_PER_BUFFER 1024
 
-extern "C" {
 #include <portaudio.h>
-extern struct {
+extern "C"
+{
+  struct
+  {
     double d8[2*60*96000];   //This is "common/datcom/..." in fortran
     float ss[4*322*NFFT];
     float savg[4*NFFT];
@@ -133,6 +140,26 @@ extern "C" int a2dCallback( const void *inputBuffer, void *outputBuffer,
   return paContinue;
 }
 
+namespace
+{
+  struct COMWrapper
+  {
+    explicit COMWrapper ()
+    {
+#ifdef Q_OS_WIN32
+      // required because Qt only does this for GUI thread
+      CoInitializeEx (nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+#endif
+    }
+    ~COMWrapper ()
+    {
+#ifdef Q_OS_WIN32
+      CoUninitialize ();
+#endif
+    }
+  };
+}
+
 void SoundInThread::run()                           //SoundInThread::run()
 {
   quitExecution = false;
@@ -144,6 +171,8 @@ void SoundInThread::run()                           //SoundInThread::run()
     return;
   }
 
+  COMWrapper c;
+
   //---------------------------------------------------- Soundcard Setup
   //  qDebug() << "Start souncard input";
 
@@ -158,15 +187,27 @@ void SoundInThread::run()                           //SoundInThread::run()
   udata.iqswap=m_IQswap;
   udata.b10db=m_10db;
 
+  auto device_info = Pa_GetDeviceInfo (m_nDevIn);
+
   inParam.device=m_nDevIn;                  //### Input Device Number ###
   inParam.channelCount=2*m_nrx;             //Number of analog channels
   inParam.sampleFormat=paFloat32;           //Get floats from Portaudio
-  inParam.suggestedLatency=0.05;
+  inParam.suggestedLatency=device_info->defaultHighInputLatency;
   inParam.hostApiSpecificStreamInfo=NULL;
 
   paerr=Pa_IsFormatSupported(&inParam,NULL,96000.0);
   if(paerr<0) {
-    emit error("PortAudio says requested soundcard format not supported.");
+    QString error_message;
+    if (paUnanticipatedHostError == paerr)
+      {
+        auto const * last_host_error = Pa_GetLastHostErrorInfo ();
+        error_message = QString {"PortAudio Host API error: %1"}.arg (last_host_error->errorText);
+      }
+    else
+      {
+        error_message = "PortAudio says requested soundcard format not supported.";
+      }
+    emit error(error_message);
 //    return;
   }
   paerr=Pa_OpenStream(&inStream,            //Input stream

map65/soundin.h

@@ -6,12 +6,6 @@
 #include <QDebug>
 #include <valarray>
 
-#ifdef Q_OS_WIN32
-#include <winsock.h>
-#else
-#include <sys/socket.h>
-#endif //Q_OS_WIN32
-
 // Thread gets audio data from soundcard and signals when a buffer of
 // specified size is available.
 class SoundInThread : public QThread

map65/soundout.cpp

@@ -1,10 +1,12 @@
 #include "soundout.h"
 
+#ifdef Q_OS_WIN32
+#include <windows.h>
+#endif
+
 #define FRAMES_PER_BUFFER 256
 
-extern "C" {
 #include <portaudio.h>
-}
 
 extern float gran();                  //Noise generator (for tests only)
 
@@ -120,18 +122,42 @@ extern "C" int d2aCallback(const void * /*inputBuffer*/, void *outputBuffer,
   return 0;
 }
 
+namespace
+{
+  struct COMWrapper
+  {
+    explicit COMWrapper ()
+    {
+#ifdef Q_OS_WIN32
+      // required because Qt only does this for GUI thread
+      CoInitializeEx (nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+#endif
+    }
+    ~COMWrapper ()
+    {
+#ifdef Q_OS_WIN32
+      CoUninitialize ();
+#endif
+    }
+  };
+}
+
 void SoundOutThread::run()
 {
+  COMWrapper c;
+
   PaError paerr;
   PaStreamParameters outParam;
   PaStream *outStream;
   paUserData udata;
   quitExecution = false;
 
+  auto device_info = Pa_GetDeviceInfo (m_nDevOut);
+
   outParam.device=m_nDevOut;                 //Output device number
   outParam.channelCount=2;                   //Number of analog channels
   outParam.sampleFormat=paInt16;             //Send short ints to PortAudio
-  outParam.suggestedLatency=0.05;
+  outParam.suggestedLatency=device_info->defaultLowOutputLatency;
   outParam.hostApiSpecificStreamInfo=NULL;
 
   udata.nTRperiod=m_TRperiod;