Fix issue #20, add support for ASIO controll pannel on windows stand-alone

Author: brummer10

NeuralRack/standalone/NeuralRack.cc

@@ -20,6 +20,7 @@
 
 #include <locale.h>
 
+#include "xpa.h"
 #include "engine.h"
 #include "ParallelThread.h"
 #define STANDALONE
@@ -31,6 +32,9 @@ class NeuralRack : public TextEntry
 {
 public:
     Widget_t*               TopWin;
+    #if defined(HAVE_PA)
+    XPa*                    xpa;
+    #endif
 
     NeuralRack() : engine() {
         workToDo.store(false, std::memory_order_release);
@@ -48,6 +52,9 @@ class NeuralRack : public TextEntry
         ui->f_index = 0;
         title = "NeuralRack";
         currentPreset = "Default";
+        #if defined(HAVE_PA)
+        xpa = nullptr;
+        #endif
         for(int i = 0;i<CONTROLS;i++)
             ui->widget[i] = NULL;
         getConfigFilePath();
@@ -61,6 +68,15 @@ class NeuralRack : public TextEntry
         //cleanup();
     }
 
+    #if defined(HAVE_PA)
+    void setXPa(XPa* xpa_, bool isASIO) {
+        xpa = xpa_;
+        #if defined(_WIN32)
+        if (!isASIO) ASIOPannel->state = 4;
+        #endif
+    }
+    #endif
+
     void startGui() {
         main_init(&ui->main);
         set_custom_theme(ui);
@@ -78,7 +94,14 @@ class NeuralRack : public TextEntry
         ui->win->scale.gravity = NORTHWEST;
         plugin_create_controller_widgets(ui,"standalone");
 
-        Widget_t* EngineMenu = menubar_add_menu(Menu, "Engine");
+        EngineMenu = menubar_add_menu(Menu, "Engine");
+        #if defined(HAVE_PA)
+        #if defined(_WIN32)
+        ASIOPannel = menu_add_entry(EngineMenu, "ASIO Pannel");
+        ASIOPannel->parent_struct = (void*)this;
+        ASIOPannel->func.button_release_callback = asio_callback;
+        #endif
+        #endif
         Widget_t* QuitMenu = menu_add_entry(EngineMenu, "Quit");
         QuitMenu->parent_struct = (void*)this;
         QuitMenu->func.button_release_callback = quit_callback;
@@ -427,6 +450,8 @@ class NeuralRack : public TextEntry
     Widget_t*               PresetLoadMenu;
     Widget_t*               ShowValues;
     Widget_t*               AutoConnect;
+    Widget_t*               EngineMenu;
+    Widget_t*               ASIOPannel;
     int                     processCounter;
     bool                    settingsHaveChanged;
     bool                    disableAutoConnect;
@@ -474,6 +499,18 @@ class NeuralRack : public TextEntry
         }
     }
 
+    #if defined(HAVE_PA)
+    static void asio_callback(void *w_, void* item_, void* user_data) {
+        Widget_t *w = (Widget_t*)w_;
+        if (w->flags & HAS_POINTER){
+            #if defined(_WIN32)
+            NeuralRack *self = static_cast<NeuralRack*>(w->parent_struct);
+            self->xpa->showAsioPannel((HWND) self->TopWin);
+            #endif
+        }
+    }
+    #endif
+
     static void openSite(std::string url) {
         std::string op = "";
         #if defined(__linux__) || defined(__FreeBSD__) || \

NeuralRack/standalone/main.cpp

@@ -116,6 +116,7 @@ int main(int argc, char *argv[]){
         r->enableEngine(1);
         r->readConfig();
         if(!xpa.startStream()) r->quitGui();
+        r->setXPa(&xpa, xpa.haveASIO);
     }
     #else
     startJack();

NeuralRack/standalone/xpa.h

@@ -44,6 +44,7 @@
 
 class XPa {
 public:
+    bool haveASIO;
 
     XPa(const char* cname){
         #if defined(__linux__) || defined(__FreeBSD__) || \
@@ -52,16 +53,19 @@ class XPa {
         #endif
         init();
         SampleRate = 0;
+        process = nullptr;
+        haveASIO = false;
     };
 
     ~XPa(){
         Pa_Terminate();
     };
 
     // open a audio stream for input/output channels and set the audio process callback
-    bool openStream(uint32_t ichannels, uint32_t ochannels, PaStreamCallback *process, void* arg) {
+    bool openStream(uint32_t ichannels, uint32_t ochannels, PaStreamCallback *process_, void* arg) {
         #if defined(__linux__) || defined(__FreeBSD__) || \
             defined(__NetBSD__) || defined(__OpenBSD__)
+        process = process_;
         std::vector<Devices> devices;
         int d = Pa_GetDeviceCount();
         const PaDeviceInfo *info;
@@ -130,7 +134,6 @@ class XPa {
         #else
         int d = Pa_GetDeviceCount();
         const PaDeviceInfo *info;
-        bool haveASIO = false;
         int index = 0;
         long minLatency, maxLatency, preferredLatency, granularity;
         for (int i = 0; i<d;i++) {
@@ -140,7 +143,7 @@ class XPa {
                         &minLatency, &maxLatency, &preferredLatency, &granularity );
                 haveASIO = true;
                 SampleRate = info->defaultSampleRate;
-                index = i;
+                ASIOIndex = index = i;
                 break;
             }
         }
@@ -207,10 +210,36 @@ class XPa {
         }
     }
 
+    #if defined(_WIN32)
+    void showAsioPannel(HWND win) {
+        if (haveASIO) {
+            stopStream();
+            int d = Pa_GetDeviceCount();
+            const PaDeviceInfo *info;
+            for (int i = 0; i<d;i++) {
+                info = Pa_GetDeviceInfo(i);
+                if(Pa_GetHostApiInfo(info->hostApi)->type == paASIO) {
+                    ASIOIndex = i;
+                    err = PaAsio_ShowControlPanel(i, (void*) win);
+                    if (err != paNoError) {
+                        std::cerr << "PortAudio error: " << Pa_GetErrorText(err) << std::endl;
+                        break;
+                    }
+                    break;
+                }
+            }
+            openStream(1, 2, process, nullptr);
+            startStream();
+        }
+    }
+    #endif
+
 private:
     PaStream* stream;
+    PaStreamCallback *process;
     PaError err;
     uint32_t SampleRate;
+    int ASIOIndex;
 
     struct Devices {
         int order;