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

* Dsound driver is now making use of an already existing window handle: the desktop window
* Removing of fluid_dll.c because it has becoming useless
* avoid a potential deadlock when calling functions within DllMain()

src/CMakeLists.txt

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

src/drivers/fluid_dsound.c

@@ -35,12 +35,8 @@ 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;
@@ -110,20 +106,6 @@ 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) {
@@ -131,7 +113,6 @@ 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;
 
@@ -183,7 +164,7 @@ new_fluid_dsound_audio_driver(fluid_settings_t* settings, fluid_synth_t* synth)
     goto error_recovery;
   }
   
-  hr = IDirectSound_SetCooperativeLevel(dev->direct_sound, fluid_win32_get_window(), DSSCL_PRIORITY);
+  hr = IDirectSound_SetCooperativeLevel(dev->direct_sound, GetDesktopWindow(), DSSCL_PRIORITY);
   if (hr != DS_OK) {
     FLUID_LOG(FLUID_ERR, "Failed to set the cooperative level");
     goto error_recovery;
@@ -301,7 +282,6 @@ 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

@@ -1,133 +0,0 @@
-/* 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