diff app_wrapper/app_main.cpp @ 0:4606bd505630 tip

first import

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app_wrapper/app_main.cpp	Sat Jun 13 15:08:10 2015 +0100
@@ -0,0 +1,1056 @@
+#include "app_main.h"
+
+#ifdef OS_WIN
+  #include <windows.h>
+  #include <shlobj.h>
+  #include <sys/stat.h>
+#endif
+
+HWND gHWND;
+
+HINSTANCE gHINST;
+UINT gScrollMessage;
+IPlug* gPluginInstance;
+RtAudio* gDAC = 0;
+RtMidiIn *gMidiIn = 0;
+RtMidiOut *gMidiOut = 0;
+
+AppState *gState;
+AppState *gTempState;
+AppState *gActiveState;
+
+char *gINIPath = new char[200]; // path of ini file
+
+unsigned int gIOVS = 512;
+unsigned int gSigVS = 32;
+unsigned int gBufIndex = 0; // Loops 0 to SigVS
+unsigned int gVecElapsed = 0;
+double gFadeMult = 0.; // Fade multiplier
+
+std::vector<unsigned int> gAudioInputDevs;
+std::vector<unsigned int> gAudioOutputDevs;
+std::vector<std::string> gMIDIInputDevNames;
+std::vector<std::string> gMIDIOutputDevNames;
+std::vector<std::string> gAudioIDDevNames;
+
+void UpdateINI()
+{
+  char buf[100]; // temp buffer for writing integers to profile strings
+
+  sprintf(buf, "%u", gState->mAudioDriverType);
+  WritePrivateProfileString("audio", "driver", buf, gINIPath);
+
+  WritePrivateProfileString("audio", "indev", gState->mAudioInDev, gINIPath);
+  WritePrivateProfileString("audio", "outdev", gState->mAudioOutDev, gINIPath);
+
+  sprintf(buf, "%u", gState->mAudioInChanL);
+  WritePrivateProfileString("audio", "in1", buf, gINIPath);
+  sprintf(buf, "%u", gState->mAudioInChanR);
+  WritePrivateProfileString("audio", "in2", buf, gINIPath);
+  sprintf(buf, "%u", gState->mAudioOutChanL);
+  WritePrivateProfileString("audio", "out1", buf, gINIPath);
+  sprintf(buf, "%u", gState->mAudioOutChanR);
+  WritePrivateProfileString("audio", "out2", buf, gINIPath);
+  sprintf(buf, "%u", gState->mAudioInIsMono);
+  WritePrivateProfileString("audio", "monoinput", buf, gINIPath);
+
+  WritePrivateProfileString("audio", "iovs", gState->mAudioIOVS, gINIPath);
+  WritePrivateProfileString("audio", "sigvs", gState->mAudioSigVS, gINIPath);
+
+  WritePrivateProfileString("audio", "sr", gState->mAudioSR, gINIPath);
+
+  WritePrivateProfileString("midi", "indev", gState->mMidiInDev, gINIPath);
+  WritePrivateProfileString("midi", "outdev", gState->mMidiOutDev, gINIPath);
+
+  sprintf(buf, "%u", gState->mMidiInChan);
+  WritePrivateProfileString("midi", "inchan", buf, gINIPath);
+  sprintf(buf, "%u", gState->mMidiOutChan);
+  WritePrivateProfileString("midi", "outchan", buf, gINIPath);
+}
+
+// returns the device name. Core Audio device names are truncated
+std::string GetAudioDeviceName(int idx)
+{
+  return gAudioIDDevNames.at(idx);
+}
+
+// returns the rtaudio device ID, based on the (truncated) device name
+int GetAudioDeviceID(char* deviceNameToTest)
+{
+  TRACE;
+
+  for(int i = 0; i < gAudioIDDevNames.size(); i++)
+  {
+    if(!strcmp(deviceNameToTest, gAudioIDDevNames.at(i).c_str() ))
+      return i;
+  }
+
+  return -1;
+}
+
+unsigned int GetMIDIInPortNumber(const char* nameToTest)
+{
+  int start = 1;
+
+  if(!strcmp(nameToTest, "off")) return 0;
+
+  #ifdef OS_OSX
+  start = 2;
+  if(!strcmp(nameToTest, "virtual input")) return 1;
+  #endif
+
+  for (int i = 0; i < gMidiIn->getPortCount(); i++)
+  {
+    if(!strcmp(nameToTest, gMidiIn->getPortName(i).c_str()))
+      return (i + start);
+  }
+
+  return -1;
+}
+
+unsigned int GetMIDIOutPortNumber(const char* nameToTest)
+{
+  int start = 1;
+
+  if(!strcmp(nameToTest, "off")) return 0;
+
+  #ifdef OS_OSX
+  start = 2;
+  if(!strcmp(nameToTest, "virtual output")) return 1;
+  #endif
+
+  for (int i = 0; i < gMidiOut->getPortCount(); i++)
+  {
+    if(!strcmp(nameToTest, gMidiOut->getPortName(i).c_str()))
+      return (i + start);
+  }
+
+  return -1;
+}
+
+// find out which devices have input channels & which have output channels, add their ids to the lists
+void ProbeAudioIO()
+{
+  TRACE;
+
+  RtAudio::DeviceInfo info;
+
+  gAudioInputDevs.clear();
+  gAudioOutputDevs.clear();
+  gAudioIDDevNames.clear();
+
+  unsigned int nDevices = gDAC->getDeviceCount();
+
+  for (int i=0; i<nDevices; i++)
+  {
+    info = gDAC->getDeviceInfo(i);
+    std::string deviceName = info.name;
+
+    #ifdef OS_OSX
+    size_t colonIdx = deviceName.rfind(": ");
+
+    if(colonIdx != std::string::npos && deviceName.length() >= 2)
+      deviceName = deviceName.substr(colonIdx + 2, deviceName.length() - colonIdx - 2);
+
+    #endif
+
+    gAudioIDDevNames.push_back(deviceName);
+
+    if ( info.probed == false )
+      std::cout << deviceName << ": Probe Status = Unsuccessful\n";
+    else if ( !strcmp("Generic Low Latency ASIO Driver", deviceName.c_str() ))
+      std::cout << deviceName << ": Probe Status = Unsuccessful\n";
+    else
+    {
+      if(info.inputChannels > 0)
+        gAudioInputDevs.push_back(i);
+
+      if(info.outputChannels > 0)
+        gAudioOutputDevs.push_back(i);
+    }
+  }
+}
+
+void ProbeMidiIO()
+{
+  if ( !gMidiIn || !gMidiOut )
+    return;
+  else
+  {
+    int nInputPorts = gMidiIn->getPortCount();
+
+    gMIDIInputDevNames.push_back("off");
+
+    #ifndef OS_WIN
+    gMIDIInputDevNames.push_back("virtual input");
+    #endif
+
+    for (int i=0; i<nInputPorts; i++ )
+    {
+      gMIDIInputDevNames.push_back(gMidiIn->getPortName(i));
+    }
+
+    int nOutputPorts = gMidiOut->getPortCount();
+
+    gMIDIOutputDevNames.push_back("off");
+
+#ifndef _WIN32
+    gMIDIOutputDevNames.push_back("virtual output");
+#endif
+
+    for (int i=0; i<nOutputPorts; i++ )
+    {
+      gMIDIOutputDevNames.push_back(gMidiOut->getPortName(i));
+      //This means the virtual output port wont be added as an input
+    }
+  }
+}
+
+bool AudioSettingsInStateAreEqual(AppState* os, AppState* ns)
+{
+  if (os->mAudioDriverType != ns->mAudioDriverType) return false;
+  if (strcmp(os->mAudioInDev, ns->mAudioInDev)) return false;
+  if (strcmp(os->mAudioOutDev, ns->mAudioOutDev)) return false;
+  if (strcmp(os->mAudioSR, ns->mAudioSR)) return false;
+  if (strcmp(os->mAudioIOVS, ns->mAudioIOVS)) return false;
+  if (strcmp(os->mAudioSigVS, ns->mAudioSigVS)) return false;
+  if (os->mAudioInChanL != ns->mAudioInChanL) return false;
+  if (os->mAudioInChanR != ns->mAudioInChanR) return false;
+  if (os->mAudioOutChanL != ns->mAudioOutChanL) return false;
+  if (os->mAudioOutChanR != ns->mAudioOutChanR) return false;
+  if (os->mAudioInIsMono != ns->mAudioInIsMono) return false;
+
+  return true;
+}
+
+bool MIDISettingsInStateAreEqual(AppState* os, AppState* ns)
+{
+  if (strcmp(os->mMidiInDev, ns->mMidiInDev)) return false;
+  if (strcmp(os->mMidiOutDev, ns->mMidiOutDev)) return false;
+  if (os->mMidiInChan != ns->mMidiInChan) return false;
+  if (os->mMidiOutChan != ns->mMidiOutChan) return false;
+
+  return true;
+}
+
+void MIDICallback( double deltatime, std::vector< unsigned char > *message, void *userData )
+{
+  if ( message->size() )
+  {
+    IMidiMsg *myMsg;
+
+    switch (message->size())
+    {
+      case 1:
+        myMsg = new IMidiMsg(0, message->at(0), 0, 0);
+        break;
+      case 2:
+        myMsg = new IMidiMsg(0, message->at(0), message->at(1), 0);
+        break;
+      case 3:
+        myMsg = new IMidiMsg(0, message->at(0), message->at(1), message->at(2));
+        break;
+      default:
+        DBGMSG("NOT EXPECTING %d midi callback msg len\n", (int) message->size());
+        break;
+    }
+
+    IMidiMsg msg(*myMsg);
+
+    delete myMsg;
+
+    // filter midi messages based on channel, if gStatus.mMidiInChan != all (0)
+    if (gState->mMidiInChan)
+    {
+      if (gState->mMidiInChan == msg.Channel() + 1 )
+        gPluginInstance->ProcessMidiMsg(&msg);
+    }
+    else
+    {
+      gPluginInstance->ProcessMidiMsg(&msg);
+    }
+  }
+}
+
+int AudioCallback(void *outputBuffer,
+                  void *inputBuffer,
+                  unsigned int nFrames,
+                  double streamTime,
+                  RtAudioStreamStatus status,
+                  void *userData )
+{
+  if ( status )
+    std::cout << "Stream underflow detected!" << std::endl;
+
+  double* inputBufferD = (double*)inputBuffer;
+  double* outputBufferD = (double*)outputBuffer;
+
+  int inRightOffset = 0;
+
+  if(!gState->mAudioInIsMono)
+    inRightOffset = nFrames;
+
+  if (gVecElapsed > N_VECTOR_WAIT) // wait N_VECTOR_WAIT * iovs before processing audio, to avoid clicks
+  {
+    for (int i=0; i<nFrames; i++)
+    {
+      gBufIndex %= gSigVS;
+
+      if (gBufIndex == 0)
+      {
+        double* inputs[2] = {inputBufferD + i, inputBufferD + inRightOffset + i};
+        double* outputs[2] = {outputBufferD + i, outputBufferD + nFrames + i};
+
+        gPluginInstance->LockMutexAndProcessDoubleReplacing(inputs, outputs, gSigVS);
+      }
+
+      // fade in
+      if (gFadeMult < 1.)
+      {
+        gFadeMult += (1. / nFrames);
+      }
+
+      outputBufferD[i] *= gFadeMult;
+      outputBufferD[i + nFrames] *= gFadeMult;
+
+      outputBufferD[i] *= APP_MULT;
+      outputBufferD[i + nFrames] *= APP_MULT;
+
+      gBufIndex++;
+    }
+  }
+  else
+  {
+    memset(outputBuffer, 0, nFrames * 2 * sizeof(double));
+  }
+
+  gVecElapsed++;
+
+  return 0;
+}
+
+bool TryToChangeAudioDriverType()
+{
+  TRACE;
+
+  if (gDAC)
+  {
+    if (gDAC->isStreamOpen())
+    {
+      gDAC->closeStream();
+    }
+
+    DELETE_NULL(gDAC);
+  }
+
+#ifdef OS_WIN
+  if(gState->mAudioDriverType == DAC_ASIO)
+    gDAC = new RtAudio(RtAudio::WINDOWS_ASIO);
+  else
+    gDAC = new RtAudio(RtAudio::WINDOWS_DS);
+#elif defined OS_OSX
+  if(gState->mAudioDriverType == DAC_COREAUDIO)
+    gDAC = new RtAudio(RtAudio::MACOSX_CORE);
+  //else
+  //gDAC = new RtAudio(RtAudio::UNIX_JACK);
+#endif
+
+  if(gDAC)
+    return true;
+  else
+    return false;
+}
+
+bool TryToChangeAudio()
+{
+  TRACE;
+
+  int inputID = -1;
+  int outputID = -1;
+
+#ifdef OS_WIN
+  if(gState->mAudioDriverType == DAC_ASIO)
+    inputID = GetAudioDeviceID(gState->mAudioOutDev);
+  else
+    inputID = GetAudioDeviceID(gState->mAudioInDev);
+#else
+  inputID = GetAudioDeviceID(gState->mAudioInDev);
+#endif
+
+  outputID = GetAudioDeviceID(gState->mAudioOutDev);
+
+  int samplerate = atoi(gState->mAudioSR);
+  int iovs = atoi(gState->mAudioIOVS);
+
+  if (inputID != -1 && outputID != -1)
+  {
+    return InitialiseAudio(inputID, outputID, samplerate, iovs, NUM_CHANNELS, gState->mAudioInChanL - 1, gState->mAudioOutChanL - 1);
+  }
+
+  return false;
+}
+
+bool InitialiseAudio(unsigned int inId,
+                     unsigned int outId,
+                     unsigned int sr,
+                     unsigned int iovs,
+                     unsigned int chnls,
+                     unsigned int inChanL,
+                     unsigned int outChanL
+                    )
+{
+  TRACE;
+
+  if (gDAC->isStreamOpen())
+  {
+    if (gDAC->isStreamRunning())
+    {
+      try
+      {
+        gDAC->abortStream();
+      }
+      catch (RtError& e)
+      {
+        e.printMessage();
+      }
+    }
+
+    gDAC->closeStream();
+  }
+
+  RtAudio::StreamParameters iParams, oParams;
+  iParams.deviceId = inId;
+  iParams.nChannels = chnls;
+  iParams.firstChannel = inChanL;
+
+  oParams.deviceId = outId;
+  oParams.nChannels = chnls;
+  oParams.firstChannel = outChanL;
+
+  gIOVS = iovs; // gIOVS may get changed by stream
+  gSigVS = atoi(gState->mAudioSigVS); // This is done here so that it changes when the callback is stopped
+
+  DBGMSG("\ntrying to start audio stream @ %i sr, %i iovs, %i sigvs\nindev = %i:%s\noutdev = %i:%s\n", sr, iovs, gSigVS, inId, GetAudioDeviceName(inId).c_str(), outId, GetAudioDeviceName(outId).c_str());
+
+  RtAudio::StreamOptions options;
+  options.flags = RTAUDIO_NONINTERLEAVED;
+// options.streamName = BUNDLE_NAME; // JACK stream name, not used on other streams
+
+  gBufIndex = 0;
+  gVecElapsed = 0;
+  gFadeMult = 0.;
+
+  gPluginInstance->SetBlockSize(gSigVS);
+  gPluginInstance->SetSampleRate(sr);
+  gPluginInstance->Reset();
+
+  try
+  {
+    TRACE;
+    gDAC->openStream( &oParams, &iParams, RTAUDIO_FLOAT64, sr, &gIOVS, &AudioCallback, NULL, &options);
+    gDAC->startStream();
+
+    memcpy(gActiveState, gState, sizeof(AppState)); // copy state to active state
+  }
+  catch ( RtError& e )
+  {
+    e.printMessage();
+    return false;
+  }
+
+  return true;
+}
+
+bool InitialiseMidi()
+{
+  try
+  {
+    gMidiIn = new RtMidiIn();
+  }
+  catch ( RtError &error )
+  {
+    FREE_NULL(gMidiIn);
+    error.printMessage();
+    return false;
+  }
+
+  try
+  {
+    gMidiOut = new RtMidiOut();
+  }
+  catch ( RtError &error )
+  {
+    FREE_NULL(gMidiOut);
+    error.printMessage();
+    return false;
+  }
+
+  gMidiIn->setCallback( &MIDICallback );
+  gMidiIn->ignoreTypes( !ENABLE_SYSEX, !ENABLE_MIDICLOCK, !ENABLE_ACTIVE_SENSING );
+
+  return true;
+}
+
+bool ChooseMidiInput(const char* pPortName)
+{
+  unsigned int port = GetMIDIInPortNumber(pPortName);
+
+  if(port == -1)
+  {
+    strcpy(gState->mMidiInDev, "off");
+    UpdateINI();
+    port = 0;
+  }
+  /*
+  IMidiMsg msg;
+  msg.MakeControlChangeMsg(IMidiMsg::kAllNotesOff, 127, 0);
+
+  std::vector<unsigned char> message;
+  message.push_back( msg.mStatus );
+  message.push_back( msg.mData1 );
+  message.push_back( msg.mData2 );
+
+  gPluginInstance->ProcessMidiMsg(&msg);
+  */
+  if (gMidiIn)
+  {
+    gMidiIn->closePort();
+
+    if (port == 0)
+    {
+      return true;
+    }
+    #ifdef OS_WIN
+    else
+    {
+      gMidiIn->openPort(port-1);
+      return true;
+    }
+    #else
+    else if(port == 1)
+    {
+      std::string virtualMidiInputName = "To ";
+      virtualMidiInputName += BUNDLE_NAME;
+      gMidiIn->openVirtualPort(virtualMidiInputName);
+      return true;
+    }
+    else
+    {
+      gMidiIn->openPort(port-2);
+      return true;
+    }
+    #endif
+  }
+
+  return false;
+}
+
+bool ChooseMidiOutput(const char* pPortName)
+{
+  unsigned int port = GetMIDIOutPortNumber(pPortName);
+
+  if(port == -1)
+  {
+    strcpy(gState->mMidiOutDev, "off");
+    UpdateINI();
+    port = 0;
+  }
+
+  if (gMidiOut)
+  {
+    /*
+    IMidiMsg msg;
+    msg.MakeControlChangeMsg(IMidiMsg::kAllNotesOff, 127, 0);
+
+    std::vector<unsigned char> message;
+    message.push_back( msg.mStatus );
+    message.push_back( msg.mData1 );
+    message.push_back( msg.mData2 );
+
+    gMidiOut->sendMessage( &message );
+    */
+    gMidiOut->closePort();
+
+    if (port == 0)
+    {
+      return true;
+    }
+    #ifdef OS_WIN
+    else
+    {
+      gMidiOut->openPort(port-1);
+      return true;
+    }
+    #else
+    else if(port == 1)
+    {
+      std::string virtualMidiOutputName = "From ";
+      virtualMidiOutputName += BUNDLE_NAME;
+      gMidiOut->openVirtualPort(virtualMidiOutputName);
+      return true;
+    }
+    else
+    {
+      gMidiOut->openPort(port-2);
+      return true;
+    }
+    #endif
+  }
+
+  return false;
+}
+
+extern bool AttachGUI()
+{
+  IGraphics* pGraphics = gPluginInstance->GetGUI();
+
+  if (pGraphics)
+  {
+#ifdef OS_WIN
+    if (!pGraphics->OpenWindow(gHWND))
+      pGraphics=0;
+#else // Cocoa OSX
+    if (!pGraphics->OpenWindow(gHWND))
+      pGraphics=0;
+#endif
+    if (pGraphics)
+    {
+      gPluginInstance->OnGUIOpen();
+      return true;
+    }
+  }
+
+  return false;
+}
+
+void Init()
+{
+  TryToChangeAudioDriverType(); // will init RTAudio with an API type based on gState->mAudioDriverType
+  ProbeAudioIO(); // find out what audio IO devs are available and put their IDs in the global variables gAudioInputDevs / gAudioOutputDevs
+  InitialiseMidi(); // creates RTMidiIn and RTMidiOut objects
+  ProbeMidiIO(); // find out what midi IO devs are available and put their names in the global variables gMidiInputDevs / gMidiOutputDevs
+
+  // Initialise the plugin
+  gPluginInstance = MakePlug(gMidiOut, &gState->mMidiOutChan);
+  gPluginInstance->RestorePreset(0);
+
+  ChooseMidiInput(gState->mMidiInDev);
+  ChooseMidiOutput(gState->mMidiOutDev);
+
+  TryToChangeAudio();
+}
+
+void Cleanup()
+{
+  try
+  {
+    // Stop the stream
+    gDAC->stopStream();
+  }
+  catch (RtError& e)
+  {
+    e.printMessage();
+  }
+
+  gMidiIn->cancelCallback();
+  gMidiIn->closePort();
+  gMidiOut->closePort();
+
+  if ( gDAC->isStreamOpen() ) gDAC->closeStream();
+
+  delete gPluginInstance;
+  delete gState;
+  delete gTempState;
+  delete gActiveState;
+  delete gMidiIn;
+  delete gMidiOut;
+  delete gDAC;
+  delete [] gINIPath;
+}
+
+#ifdef OS_WIN
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nShowCmd)
+{
+  // first check to make sure this is the only instance running
+  // http://www.bcbjournal.org/articles/vol3/9911/Single-instance_applications.htm
+  try
+  {
+    // Try to open the mutex.
+    HANDLE hMutex = OpenMutex(
+                      MUTEX_ALL_ACCESS, 0, BUNDLE_NAME);
+
+    // If hMutex is 0 then the mutex doesn't exist.
+    if (!hMutex)
+      hMutex = CreateMutex(0, 0, BUNDLE_NAME);
+    else
+    {
+      // This is a second instance. Bring the
+      // original instance to the top.
+      HWND hWnd = FindWindow(0, BUNDLE_NAME);
+      SetForegroundWindow(hWnd);
+
+      return 0;
+    }
+
+    gHINST=hInstance;
+
+    InitCommonControls();
+    gScrollMessage = RegisterWindowMessage("MSWHEEL_ROLLMSG");
+
+    gState = new AppState();
+    gTempState = new AppState();
+    gActiveState = new AppState();
+
+    if (SHGetFolderPathA( NULL, CSIDL_LOCAL_APPDATA, NULL, 0, gINIPath ) != S_OK)
+    {
+      DBGMSG("could not retrieve the user's application data directory!\n");
+
+      //TODO error msg?
+      return 1;
+    }
+
+    sprintf(gINIPath, "%s\\%s", gINIPath, BUNDLE_NAME); // Add the app name to the path
+
+    struct stat st;
+    if(stat(gINIPath, &st) == 0) // if directory exists
+    {
+      sprintf(gINIPath, "%s\\%s", gINIPath, "settings.ini"); // add file name to path
+
+      if(stat(gINIPath, &st) == 0) // if settings file exists read values into state
+      {
+        gState->mAudioDriverType = GetPrivateProfileInt("audio", "driver", 0, gINIPath);
+
+        GetPrivateProfileString("audio", "indev", DEFAULT_INPUT_DEV, gState->mAudioInDev, 100, gINIPath);
+        GetPrivateProfileString("audio", "outdev", DEFAULT_OUTPUT_DEV, gState->mAudioOutDev, 100, gINIPath);
+
+        //audio
+        gState->mAudioInChanL = GetPrivateProfileInt("audio", "in1", 1, gINIPath); // 1 is first audio input
+        gState->mAudioInChanR = GetPrivateProfileInt("audio", "in2", 2, gINIPath);
+        gState->mAudioOutChanL = GetPrivateProfileInt("audio", "out1", 1, gINIPath); // 1 is first audio output
+        gState->mAudioOutChanR = GetPrivateProfileInt("audio", "out2", 2, gINIPath);
+        gState->mAudioInIsMono = GetPrivateProfileInt("audio", "monoinput", 0, gINIPath);
+
+        GetPrivateProfileString("audio", "iovs", "512", gState->mAudioIOVS, 100, gINIPath);
+        GetPrivateProfileString("audio", "sigvs", "32", gState->mAudioSigVS, 100, gINIPath);
+        GetPrivateProfileString("audio", "sr", "44100", gState->mAudioSR, 100, gINIPath);
+
+        //midi
+        GetPrivateProfileString("midi", "indev", "no input", gState->mMidiInDev, 100, gINIPath);
+        GetPrivateProfileString("midi", "outdev", "no output", gState->mMidiOutDev, 100, gINIPath);
+
+        gState->mMidiInChan = GetPrivateProfileInt("midi", "inchan", 0, gINIPath); // 0 is any
+        gState->mMidiOutChan = GetPrivateProfileInt("midi", "outchan", 0, gINIPath); // 1 is first chan
+
+        UpdateINI(); // this will write over any invalid values in the file
+      }
+      else // settings file doesn't exist, so populate with default values
+      {
+        UpdateINI();
+      }
+    }
+    else
+    {
+      // folder doesn't exist - make folder and make file
+      CreateDirectory(gINIPath, NULL);
+      sprintf(gINIPath, "%s%s", gINIPath, "settings.ini"); // add file name to path
+      UpdateINI(); // will write file if doesn't exist
+    }
+
+    Init();
+
+    CreateDialog(gHINST,MAKEINTRESOURCE(IDD_DIALOG_MAIN),GetDesktopWindow(),MainDlgProc);
+
+    for(;;)
+    {
+      MSG msg= {0,};
+      int vvv = GetMessage(&msg,NULL,0,0);
+      if (!vvv)  break;
+
+      if (vvv<0)
+      {
+        Sleep(10);
+        continue;
+      }
+      if (!msg.hwnd)
+      {
+        DispatchMessage(&msg);
+        continue;
+      }
+
+      if (gHWND && IsDialogMessage(gHWND,&msg)) continue;
+
+      // default processing for other dialogs
+      HWND hWndParent=NULL;
+      HWND temphwnd = msg.hwnd;
+      do
+      {
+        if (GetClassLong(temphwnd, GCW_ATOM) == (INT)32770)
+        {
+          hWndParent=temphwnd;
+          if (!(GetWindowLong(temphwnd,GWL_STYLE)&WS_CHILD)) break; // not a child, exit
+        }
+      }
+      while (temphwnd = GetParent(temphwnd));
+
+      if (hWndParent && IsDialogMessage(hWndParent,&msg)) continue;
+
+      TranslateMessage(&msg);
+      DispatchMessage(&msg);
+
+    }
+
+    // in case gHWND didnt get destroyed -- this corresponds to SWELLAPP_DESTROY roughly
+    if (gHWND) DestroyWindow(gHWND);
+
+    Cleanup();
+
+    ReleaseMutex(hMutex);
+  }
+  catch(...)
+  {
+    //TODO proper error catching
+    DBGMSG("another instance running");
+  }
+  return 0;
+}
+#else
+
+extern HMENU SWELL_app_stocksysmenu;
+const char *homeDir;
+
+INT_PTR SWELLAppMain(int msg, INT_PTR parm1, INT_PTR parm2)
+{
+  switch (msg)
+  {
+    case SWELLAPP_ONLOAD:
+
+      gState = new AppState();
+      gTempState = new AppState();
+      gActiveState = new AppState();
+
+      homeDir = getenv("HOME");
+      sprintf(gINIPath, "%s/Library/Application Support/%s/", homeDir, BUNDLE_NAME);
+
+      struct stat st;
+      if(stat(gINIPath, &st) == 0) // if directory exists
+      {
+        sprintf(gINIPath, "%s%s", gINIPath, "settings.ini"); // add file name to path
+
+        if(stat(gINIPath, &st) == 0) // if settings file exists read values into state
+        {
+          gState->mAudioDriverType = GetPrivateProfileInt("audio", "driver", 0, gINIPath);
+
+          GetPrivateProfileString("audio", "indev", "Built-in Input", gState->mAudioInDev, 100, gINIPath);
+          GetPrivateProfileString("audio", "outdev", "Built-in Output", gState->mAudioOutDev, 100, gINIPath);
+
+          //audio
+          gState->mAudioInChanL = GetPrivateProfileInt("audio", "in1", 1, gINIPath); // 1 is first audio input
+          gState->mAudioInChanR = GetPrivateProfileInt("audio", "in2", 2, gINIPath);
+          gState->mAudioOutChanL = GetPrivateProfileInt("audio", "out1", 1, gINIPath); // 1 is first audio output
+          gState->mAudioOutChanR = GetPrivateProfileInt("audio", "out2", 2, gINIPath);
+          gState->mAudioInIsMono = GetPrivateProfileInt("audio", "monoinput", 0, gINIPath);
+
+          GetPrivateProfileString("audio", "iovs", "512", gState->mAudioIOVS, 100, gINIPath);
+          GetPrivateProfileString("audio", "sigvs", "32", gState->mAudioSigVS, 100, gINIPath);
+          GetPrivateProfileString("audio", "sr", "44100", gState->mAudioSR, 100, gINIPath);
+
+          //midi
+          GetPrivateProfileString("midi", "indev", "no input", gState->mMidiInDev, 100, gINIPath);
+          GetPrivateProfileString("midi", "outdev", "no output", gState->mMidiOutDev, 100, gINIPath);
+
+          gState->mMidiInChan = GetPrivateProfileInt("midi", "inchan", 0, gINIPath); // 0 is any
+          gState->mMidiOutChan = GetPrivateProfileInt("midi", "outchan", 0, gINIPath); // 1 is first chan
+
+          UpdateINI(); // this will write over any invalid values in the file
+        }
+        else // settings file doesn't exist, so populate with default values
+        {
+          UpdateINI();
+        }
+
+      }
+      else   // folder doesn't exist - make folder and make file
+      {
+        // http://blog.tremend.ro/2008/10/06/create-directories-in-c-using-mkdir-with-proper-permissions/
+
+        mode_t process_mask = umask(0);
+        int result_code = mkdir(gINIPath, S_IRWXU | S_IRWXG | S_IRWXO);
+        umask(process_mask);
+
+        if(result_code) return 1;
+        else
+        {
+          sprintf(gINIPath, "%s%s", gINIPath, "settings.ini"); // add file name to path
+          UpdateINI(); // will write file if doesn't exist
+        }
+      }
+      break;
+#pragma mark loaded
+    case SWELLAPP_LOADED:
+    {
+      Init();
+
+      HMENU menu = SWELL_GetCurrentMenu();
+
+      if (menu)
+      {
+        // other windows will get the stock (bundle) menus
+        //SWELL_SetDefaultModalWindowMenu(menu);
+        //SWELL_SetDefaultWindowMenu(menu);
+
+        // work on a new menu
+        menu = SWELL_DuplicateMenu(menu);
+        HMENU src = LoadMenu(NULL,MAKEINTRESOURCE(IDR_MENU1));
+        int x;
+        for (x=0; x<GetMenuItemCount(src)-1; x++)
+        {
+          HMENU sm = GetSubMenu(src,x);
+          if (sm)
+          {
+            char str[1024];
+            MENUITEMINFO mii= {sizeof(mii),MIIM_TYPE,};
+            mii.dwTypeData=str;
+            mii.cch=sizeof(str);
+            str[0]=0;
+            GetMenuItemInfo(src,x,TRUE,&mii);
+            MENUITEMINFO mi= {sizeof(mi),MIIM_STATE|MIIM_SUBMENU|MIIM_TYPE,MFT_STRING,0,0,SWELL_DuplicateMenu(sm),NULL,NULL,0,str};
+            InsertMenuItem(menu,x+1,TRUE,&mi);
+          }
+        }
+      }
+
+      if (menu)
+      {
+        HMENU sm=GetSubMenu(menu,1);
+        DeleteMenu(sm,ID_QUIT,MF_BYCOMMAND); // remove QUIT from our file menu, since it is in the system menu on OSX
+        DeleteMenu(sm,ID_PREFERENCES,MF_BYCOMMAND); // remove PREFERENCES from the file menu, since it is in the system menu on OSX
+
+        // remove any trailing separators
+        int a= GetMenuItemCount(sm);
+        while (a > 0 && GetMenuItemID(sm,a-1)==0) DeleteMenu(sm,--a,MF_BYPOSITION);
+
+        DeleteMenu(menu,1,MF_BYPOSITION); // delete file menu
+      }
+
+      // if we want to set any default modifiers for items in the menus, we can use:
+      // SetMenuItemModifier(menu,commandID,MF_BYCOMMAND,'A',FCONTROL) etc.
+
+      HWND hwnd = CreateDialog(gHINST,MAKEINTRESOURCE(IDD_DIALOG_MAIN),NULL,MainDlgProc);
+      if (menu)
+      {
+        SetMenu(hwnd, menu); // set the menu for the dialog to our menu (on Windows that menu is set from the .rc, but on SWELL
+        SWELL_SetDefaultModalWindowMenu(menu); // other windows will get the stock (bundle) menus
+      }
+      // we need to set it manually (and obviously we've edited the menu anyway)
+    }
+
+    if(!AttachGUI()) DBGMSG("couldn't attach gui\n"); //todo error
+
+    break;
+    case SWELLAPP_ONCOMMAND:
+      // this is to catch commands coming from the system menu etc
+      if (gHWND && (parm1&0xffff)) SendMessage(gHWND,WM_COMMAND,parm1&0xffff,0);
+      break;
+#pragma mark destroy
+    case SWELLAPP_DESTROY:
+
+      if (gHWND) DestroyWindow(gHWND);
+      Cleanup();
+      break;
+    case SWELLAPP_PROCESSMESSAGE: // can hook keyboard input here
+      // parm1 = (MSG*), should we want it -- look in swell.h to see what the return values refer to
+      break;
+  }
+  return 0;
+}
+
+#endif
+
+
+#ifndef OS_WIN
+#include "swell-dlggen.h"
+
+#define SET_IDD_SCALE 1.
+#define SET_IDD_STYLE SWELL_DLG_WS_FLIPPED|SWELL_DLG_WS_NOAUTOSIZE
+
+SWELL_DEFINE_DIALOG_RESOURCE_BEGIN(IDD_DIALOG_MAIN, SET_IDD_STYLE, BUNDLE_NAME, GUI_WIDTH, GUI_HEIGHT, SET_IDD_SCALE)
+BEGIN
+//   EDITTEXT        IDC_EDIT1,59,50,145,14,ES_AUTOHSCROLL
+//   LTEXT           "Enter some text here:",IDC_STATIC,59,39,73,8
+END
+SWELL_DEFINE_DIALOG_RESOURCE_END(IDD_DIALOG_MAIN)
+
+SWELL_DEFINE_DIALOG_RESOURCE_BEGIN(IDD_DIALOG_PREF,SET_IDD_STYLE,"Preferences",320,420,SET_IDD_SCALE)
+BEGIN
+GROUPBOX        "Audio Settings", IDC_STATIC, 5, 10, 300, 230
+
+LTEXT           "Driver Type", IDC_STATIC, 20, 32, 60, 20
+COMBOBOX        IDC_COMBO_AUDIO_DRIVER, 20, 50, 150, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Input Device", IDC_STATIC, 20, 75, 80, 20
+COMBOBOX        IDC_COMBO_AUDIO_IN_DEV, 20, 90, 150, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Output Device", IDC_STATIC, 20, 115, 80, 20
+COMBOBOX        IDC_COMBO_AUDIO_OUT_DEV, 20, 130, 150, 100, CBS_DROPDOWNLIST
+
+LTEXT           "In 1 (L)", IDC_STATIC, 20, 155, 90, 20
+COMBOBOX        IDC_COMBO_AUDIO_IN_L, 20, 170, 46, 100, CBS_DROPDOWNLIST
+
+LTEXT           "In 2 (R)", IDC_STATIC, 75, 155, 90, 20
+COMBOBOX        IDC_COMBO_AUDIO_IN_R, 75, 170, 46, 100, CBS_DROPDOWNLIST
+
+CHECKBOX        "Mono", IDC_CB_MONO_INPUT, 125, 128, 56, 100, 0
+
+LTEXT           "Out 1 (L)", IDC_STATIC, 20, 195, 60, 20
+COMBOBOX        IDC_COMBO_AUDIO_OUT_L, 20, 210, 46, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Out 2 (R)", IDC_STATIC, 75, 195, 60, 20
+COMBOBOX        IDC_COMBO_AUDIO_OUT_R, 75, 210, 46, 100, CBS_DROPDOWNLIST
+
+LTEXT           "IO Vector Size", IDC_STATIC, 200, 32, 80, 20
+COMBOBOX        IDC_COMBO_AUDIO_IOVS, 200, 50, 90, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Signal Vector Size", IDC_STATIC, 200, 75, 100, 20
+COMBOBOX        IDC_COMBO_AUDIO_SIGVS, 200, 90, 90, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Sampling Rate", IDC_STATIC, 200, 115, 80, 20
+COMBOBOX        IDC_COMBO_AUDIO_SR, 200, 130, 90, 100, CBS_DROPDOWNLIST
+
+PUSHBUTTON      "Audio Midi Setup...", IDC_BUTTON_ASIO, 180, 170, 110, 40
+
+GROUPBOX        "MIDI Settings", IDC_STATIC, 5, 255, 300, 120
+
+LTEXT           "Input Device", IDC_STATIC, 20, 275, 100, 20
+COMBOBOX        IDC_COMBO_MIDI_IN_DEV, 20, 293, 150, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Output Device", IDC_STATIC, 20, 320, 100, 20
+COMBOBOX        IDC_COMBO_MIDI_OUT_DEV, 20, 338, 150, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Input Channel", IDC_STATIC, 200, 275, 100, 20
+COMBOBOX        IDC_COMBO_MIDI_IN_CHAN, 200, 293, 90, 100, CBS_DROPDOWNLIST
+
+LTEXT           "Output Channel", IDC_STATIC, 200, 320, 100, 20
+COMBOBOX        IDC_COMBO_MIDI_OUT_CHAN, 200, 338, 90, 100, CBS_DROPDOWNLIST
+
+DEFPUSHBUTTON   "OK", IDOK, 192, 383, 50, 20
+PUSHBUTTON      "Apply", IDAPPLY, 132, 383, 50, 20
+PUSHBUTTON      "Cancel", IDCANCEL, 252, 383, 50, 20
+END
+SWELL_DEFINE_DIALOG_RESOURCE_END(IDD_DIALOG_PREF)
+
+#include "swell-menugen.h"
+
+SWELL_DEFINE_MENU_RESOURCE_BEGIN(IDR_MENU1)
+POPUP "&File"
+BEGIN
+// MENUITEM SEPARATOR
+MENUITEM "Preferences...",              ID_PREFERENCES
+MENUITEM "&Quit",                       ID_QUIT
+END
+POPUP "&Help"
+BEGIN
+MENUITEM "&About",                      ID_ABOUT
+END
+SWELL_DEFINE_MENU_RESOURCE_END(IDR_MENU1)
+
+#endif
\ No newline at end of file