Revert "make dsound driver using the desktop window handle (#269)"

This reverts commit be6e1ab88a. Forgot to take public API HInstance getter/setter into account.

src/CMakeLists.txt

@@ -76,7 +76,7 @@ if ( PORTAUDIO_SUPPORT )
 endif ( PORTAUDIO_SUPPORT )
 
 if ( WINDOWS_SUPPORT )
-  set ( fluid_windows_SOURCES drivers/fluid_dsound.c drivers/fluid_winmidi.c )
+  set ( fluid_windows_SOURCES fluid_dll.c drivers/fluid_dsound.c drivers/fluid_winmidi.c )
 endif ( WINDOWS_SUPPORT )
 
 if ( OSS_SUPPORT )

src/drivers/fluid_dsound.c

@@ -35,8 +35,12 @@ new_fluid_dsound_audio_driver(fluid_settings_t* settings, fluid_synth_t* synth);
 void delete_fluid_dsound_audio_driver(fluid_audio_driver_t* data);
 DWORD WINAPI fluid_dsound_audio_run(LPVOID lpParameter);
 
+HWND fluid_win32_get_window(void);
 char* fluid_win32_error(HRESULT hr);
 
+
+#define FLUID_HINSTANCE  ((HINSTANCE)fluid_get_hinstance())
+
 typedef struct {
   fluid_audio_driver_t driver;
   LPDIRECTSOUND direct_sound;
@@ -106,6 +110,20 @@ new_fluid_dsound_audio_driver(fluid_settings_t* settings, fluid_synth_t* synth)
   int periods, period_size;
   fluid_dsound_devsel_t devsel;
 
+  /* check if the globals are initialized */
+  if (FLUID_HINSTANCE == NULL) {
+    FLUID_LOG(FLUID_ERR, "FluidSynth hinstance not set, which is needed for DirectSound");
+    return NULL;
+  }
+
+/*
+  if (fluid_wnd == NULL) {
+    if (fluid_win32_create_window() != 0) {
+      FLUID_LOG(FLUID_ERR, "Couldn't create window needed for DirectSound");
+      return NULL;
+    }
+  }
+*/
   /* create and clear the driver data */
   dev = FLUID_NEW(fluid_dsound_audio_driver_t);
   if (dev == NULL) {
@@ -113,6 +131,7 @@ new_fluid_dsound_audio_driver(fluid_settings_t* settings, fluid_synth_t* synth)
     return NULL;
   }
   FLUID_MEMSET(dev, 0, sizeof(fluid_dsound_audio_driver_t));
+
   dev->synth = synth;
   dev->cont = 1;
 
@@ -164,7 +183,7 @@ new_fluid_dsound_audio_driver(fluid_settings_t* settings, fluid_synth_t* synth)
     goto error_recovery;
   }
 
-  hr = IDirectSound_SetCooperativeLevel(dev->direct_sound, GetDesktopWindow(), DSSCL_PRIORITY);
+  hr = IDirectSound_SetCooperativeLevel(dev->direct_sound, fluid_win32_get_window(), DSSCL_PRIORITY);
   if (hr != DS_OK) {
     FLUID_LOG(FLUID_ERR, "Failed to set the cooperative level");
     goto error_recovery;
@@ -282,6 +301,7 @@ void delete_fluid_dsound_audio_driver(fluid_audio_driver_t* d)
   if (dev->direct_sound != NULL) {
     IDirectSound_Release(dev->direct_sound);
   }
+
   FLUID_FREE(dev);
 }
 

src/fluid_dll.c

@@ -0,0 +1,133 @@
+/* FluidSynth - A Software Synthesizer
+ *
+ * Copyright (C) 2003  Peter Hanappe and others.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifdef WIN32
+#include "fluidsynth_priv.h"
+#include "fluid_sys.h"
+
+static HINSTANCE fluid_hinstance = NULL;
+static HWND fluid_wnd = NULL;
+static int fluid_refCount = 0;
+
+int fluid_win32_create_window(void);
+void fluid_win32_destroy_window(void);
+HWND fluid_win32_get_window(void);
+
+#ifndef FLUIDSYNTH_NOT_A_DLL
+BOOL WINAPI DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
+{
+  FLUID_LOG(FLUID_DBG, "DllMain");
+  switch (ul_reason_for_call) {
+  case DLL_PROCESS_ATTACH:
+    fluid_refCount++;
+    if (1 == fluid_refCount) {
+      fluid_set_hinstance((void*) hModule);
+      fluid_win32_create_window();
+    }
+    break;
+  case DLL_PROCESS_DETACH:
+    fluid_refCount--;
+    if (fluid_refCount == 0) {
+      fluid_win32_destroy_window();
+    }
+    break;
+  }
+  return TRUE;
+}
+#endif
+
+/**
+ * Set the handle to the instance of the application on the Windows platform.
+ * @param Application instance pointer
+ *
+ * The handle is needed to open DirectSound.
+ */
+void fluid_set_hinstance(void* hinstance)
+{
+  if (fluid_hinstance == NULL) {
+    fluid_hinstance = (HINSTANCE) hinstance;
+    FLUID_LOG(FLUID_DBG, "DLL instance = %d", (int) fluid_hinstance);
+  }
+}
+
+/**
+ * Get the handle to the instance of the application on the Windows platform.
+ * @return Application instance pointer or NULL if not set
+ */
+void* fluid_get_hinstance(void)
+{
+  return (void*) fluid_hinstance;
+}
+
+static long FAR PASCAL fluid_win32_wndproc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+  switch (message) {
+  case WM_CREATE:
+    break;
+  case WM_DESTROY:
+    break;
+  default:
+    return DefWindowProc(hWnd, message, wParam, lParam);
+    break;
+  }
+  return(0L);
+}
+
+int fluid_win32_create_window(void)
+{
+  WNDCLASS myClass;
+  myClass.hCursor = LoadCursor( NULL, IDC_ARROW );
+  myClass.hIcon = NULL;
+  myClass.lpszMenuName = (LPSTR) NULL;
+  myClass.lpszClassName = (LPSTR) "FluidSynth";
+  myClass.hbrBackground = (HBRUSH)(COLOR_WINDOW);
+  myClass.hInstance = fluid_hinstance;
+  myClass.style = CS_GLOBALCLASS;
+  myClass.lpfnWndProc = fluid_win32_wndproc;
+  myClass.cbClsExtra = 0;
+  myClass.cbWndExtra = 0;
+  if (!RegisterClass(&myClass)) {
+    return -100;
+  }
+  fluid_wnd = CreateWindow((LPSTR) "FluidSynth", (LPSTR) "FluidSynth", WS_OVERLAPPEDWINDOW,
+              CW_USEDEFAULT, CW_USEDEFAULT, 400, 300, (HWND) NULL, (HMENU) NULL,
+              fluid_hinstance, (LPSTR) NULL);
+  if (fluid_wnd == NULL) {
+    FLUID_LOG(FLUID_ERR, "Can't create window");
+    return -101;
+  }
+  return 0;
+}
+
+void fluid_win32_destroy_window(void)
+{
+  HWND hwnd = fluid_win32_get_window();
+  if (hwnd) {
+    DestroyWindow(hwnd);
+    fluid_wnd = 0;
+  }
+}
+
+HWND fluid_win32_get_window(void)
+{
+  return fluid_wnd;
+}
+
+#endif	// #ifdef WIN32