WindowsHookEnumerationTrigger::WindowsHookEnumerationTrigger( bool doCreateInvisibleWindow )
: mCreateInvisibleWindow( doCreateInvisibleWindow ),
mInvisibleWindow(NULL),
mEnumerationNeeded(false)
{
if ( mCreateInvisibleWindow )
{
bool ret = createInvisibleWindow();
assert( ret );
}
// We initialize mEnumerationNeeded to true so a first enumeration is triggered immediately
// (i.e. the first time enumerationNeeded() is called), rather than having to wait
// for a first system-wide WM_DEVICECHANGE message
mEnumerationNeeded = true;
if ( mTriggerInstances.empty() )
{
DWORD threadID = GetCurrentThreadId();
HINSTANCE hInstance = GetModuleHandle(NULL) ;
mHookHandle = SetWindowsHookEx( WH_CALLWNDPROC, wndProcHook, hInstance, threadID );
assert( mHookHandle );
}
mTriggerInstances.push_back(this);
}
unsigned int __stdcall Twinamp2dsp::threadProc(void *self0)
{
Twinamp2dsp *self = (Twinamp2dsp*)self0;
static const char_t *FFDSHOW_WINAMP_CLASS = _l("ffdshow_winamp_class");
randomize();
setThreadName(DWORD(-1), "winamp2");
HINSTANCE hi = self->mod->hDllInstance;
char_t windowName[80];
tsnprintf_s(windowName, countof(windowName), _TRUNCATE, _l("%s_window%i"), FFDSHOW_WINAMP_CLASS, rand());
HWND h = createInvisibleWindow(hi, FFDSHOW_WINAMP_CLASS, windowName, wndProc, self, NULL);
self->mod->hwndParent = h;
if (self->mod->Init(self->mod) == 0) {
{
boost::unique_lock<boost::mutex> lock(self->mut);
self->h = h;
}
self->cond.notify_one();
if (self->h) {
SetWindowLongPtr(self->h, GWLP_USERDATA, LONG_PTR(self));
MSG msg;
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
} else {
self->h = (HWND) - 1;
DestroyWindow(h);
}
if (self->mod->Quit) {
self->mod->Quit(self->mod);
}
UnregisterClass(FFDSHOW_WINAMP_CLASS, hi);
_endthreadex(0);
return 0;
}
