| Autor | - Tema: How to write a CUEing plugin - |
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 Mensajes Thu 04 Sep 08 @ 5:23 amI've gone through the examples and header files but I'm still a bit lost on this what I want to do is to make VirtualDJ interact with a DMX control appication, I've got the control part figured out, but my problem is where to start with writing the plugin for VirtualDJ what I need is a function that is continuously called and checks for the song position which would be compared against a file with cue points for DMX effects Which type of plugins would that fit under (e.g. sound, video, device)? and how do I go about only getting the song position? I tried modifying the supplied brake plugin but it seems to ruin the samples, I don't want to pass any samples back I only need to read the song position and figure out which deck the slider is leaning towards so I can feed the cue list off the song playing there any help or examples would be greatly appreciated cheers Sam |
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| Mensajes Fri 05 Sep 08 @ 6:39 am Thanks heaps for your replies I really appreciate it I was inclined towards the 100ms option as well since I'm not too confident of my multi-threading skills :) but are you referring to the onTimer() function in the PluginDevice class? or just a CALLBACK windows timer? the problem is if I make the plugin inherit the Dsp2 class then it expects me to recalculate the samples otherwise it kills the audio if I try multiple inheritance of both the dsp and the device class then it gets slightly upset with double declaration of certain things any ideas? Thanks again Sam |
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| Mensajes Fri 05 Sep 08 @ 9:15 am Yes, use a callback timer. Don't try and declare two classes, just use the dsp class. If you don't do anything to the buffer, then it shouldn't affect the audio. I've just created a blank DSP project, run it, and sound was unaffected without my doing any processing... Regards, Scott |
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| Mensajes Fri 05 Sep 08 @ 7:22 pm Thanks for the info SBDJ I found an example of CALLBACK timers posted on the forums which I've copied below, I almost got it to work but it fires only once I declared the function outside the plugin class and I put the constructor in onLoad and the destructor in onRelease is that correct? * a Timer: // Declaration void CALLBACK TimerProc(HWND, UINT, UINT, DWORD); UINT uTimer; DWORD speed; // (in ms) // Constructor uTimer = (UINT) SetTimer(NULL, NULL, speed, (TIMERPROC)TimerProc); // Desctructor KillTimer(NULL, uTimer); // Your function void CALLBACK TimerProc(HWND, UINT, UINT, DWORD) { // write here to do each 'speed' ms } |
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| Mensajes Fri 05 Sep 08 @ 7:25 pm ok correction now I got it to work thanks for all your help is the structure I mentioned in my last message still correct though? and also another problem, if I declare the CALLBACK function outside the class then I can't use the plugin functions such as GetInfo ?? |
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| Mensajes Fri 05 Sep 08 @ 10:32 pm update: I tried writing a wrapper function for timerproc and it worked :) thanks again for your help |
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| Mensajes Sun 07 Sep 08 @ 12:28 pm You can also add the word "static" for the CALLBACK. For example, here is a solution to include Dialog CALLBACK in a class: class CDialog { public: VOID Create(); private: HWND hMainDlg; static BOOL CALLBACK DialogProcStatic(HWND, UINT, WPARAM, LPARAM); virtual BOOL DialogProc(HWND, UINT, WPARAM, LPARAM); }; //---------------------------------------------------------------------------------------- VOID CDialog::Create() { hMainDlg = CreateDialogParam(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), hWndParent, DialogProcStatic, (LPARAM)this); } //---------------------------------------------------------------------------------------- BOOL CALLBACK CDialog::DialogProcStatic(HWND hDlg,UINT message,WPARAM wParam,LPARAM lParam) { if (message == WM_INITDIALOG) { SetWindowLongPtr(hDlg, GWL_USERDATA, (LONG) lParam); } LPARAM pThis = GetWindowLongPtr(hDlg, GWL_USERDATA); if (!pThis) return FALSE; return (((CDialog*)pThis)->DialogProc(hDlg, message, wParam, lParam)); } //---------------------------------------------------------------------------------------- BOOL CDialog::DialogProc(HWND hDlg,UINT message,WPARAM wParam,LPARAM lParam) { switch(message) { case WM_INITDIALOG: break; default: return FALSE; } return TRUE; } |
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