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auto-parsec-vdd's Introduction

auto-parsec-vdd

This is a fork of parsec-vdd.

As you may know, VNC servers and Sunshine do not work without a monitor connected to the graphics card.

This solves this problem polling for the monitor status and attaching a virtual monitor when no real monitor is found. This program also works without an active session and as such can be launched from a variety of environments including the task scheduler.

Full credits to nomi-san as I only added the monitor detection routine and the auto attach/detach logic.

parsec-vdd

✨ Standalone Parsec VDD, create a virtual super display without Parsec, upto 4K 2160p@240hz.


image

About

This project demonstrates a standalone solution to create a virtual display by using Parsec VDD, without relying on the Parsec app.

"Parsec VDD (Virtual Display Driver) is a perfect software driver developed by Parsec. It utilizes the Idd/cx API (Indirect Display Driver) to create a virtual display on a computer. This virtual display is particularly useful in situations where a physical monitor may not be available or when additional screens are desired.

One of the notable features of Parsec VDD is its support for a wide range of resolutions and refresh rates, including up to 240 Hz. This makes it well-suited for gaming, as it can provide a high-quality visual experience. It enables users to simulate the presence of additional screens or work without a physical monitor, enhancing flexibility and customization in display management."

How does it compare to other IDDs?

If you need an application, check out this repo: https://github.com/KtzeAbyss/Easy-Virtual-Display


Getting started

Download and install Parsec Virtual Display Driver, just pick one:


Use this GUID interface to obtain the device handle.

const GUID PARSEC_VDD_DEVINTERFACE = \
  { 0x00b41627, 0x04c4, 0x429e, { 0xa2, 0x6e, 0x02, 0x65, 0xcf, 0x50, 0xc8, 0xfa } };
  
HANDLE device = OpenDeviceHandle(PARSEC_VDD_DEVINTERFACE);
  • Try this function to create your OpenDeviceHandle(GUID): fc152f42@fufesou/RustDeskIddDriver
  • Or hard code 😀 with this file path \\?\root#display#%(DISPLAY_INDEX)#{00b41627-04c4-429e-a26e-0265cf50c8fa}

Here's the way to control the VDD:

enum VddCtlCode {
    IOCTL_VDD_CONNECT = 0x22A008,
    IOCTL_VDD_ADD = 0x22E004,
    IOCTL_VDD_UPDATE = 0x22A00C,
};

void VddIoCtl(HANDLE vdd, VddCtlCode code) {
    BYTE InBuffer[32]{};
    int OutBuffer = 0;
    OVERLAPPED Overlapped{};
    DWORD NumberOfBytesTransferred;

    Overlapped.hEvent = CreateEventW(NULL, NULL, NULL, NULL);
    DeviceIoControl(vdd, code, InBuffer, _countof(InBuffer), &OutBuffer, sizeof(OutBuffer), NULL, &Overlapped);
    GetOverlappedResult(vdd, &Overlapped, &NumberOfBytesTransferred, TRUE);

    if (Overlapped.hEvent && Overlapped.hEvent != INVALID_HANDLE_VALUE)
        CloseHandle(Overlapped.hEvent);
}

And here is the pseudo-code for the VDD manipulation:

void VddThread(HANDLE vdd, bool &running) {
    // Plug in monitor.
    VddIoCtl(vdd, IOCTL_VDD_CONNECT);
    VddIoCtl(vdd, IOCTL_VDD_UPDATE);
    VddIoCtl(vdd, IOCTL_VDD_ADD);
    VddIoCtl(vdd, IOCTL_VDD_UPDATE);
    // Keep monitor connection.
    for (running = true; running; ) {
        Sleep(100);
        VddIoCtl(vdd, IOCTL_VDD_UPDATE);
    }
}

bool PlugInMonitor(HANDLE &vdd, HANDLE &vddThread, bool &running) {
    char devpath[1024];
    for (int idx = 0; idx < 5; idx++) {
        // Hardcode device path.
        sprintf(devpath, "\\\\?\\root#display#000%d#%s", idx, "{00b41627-04c4-429e-a26e-0265cf50c8fa}");    
        vdd = CreateFileA(devpath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);

        if (vdd && vdd != INVALID_HANDLE_VALUE) {
            vddThread = CreateThread(VddThread);
            return true;
        }
    }

    return false;
}

void PlugOutMonitor(HANDLE vdd, HANDLE vddThread, bool &running) {
    running = false;
    WaitForSingleObject(vddThread, INFINITE);

    // Reconnect to unplug monitor.
    VddIoCtl(vdd, IOCTL_VDD_CONNECT);
    CloseHandle(vdd);
}

A simple usage, see demo.cc to learn more.

int main()
{
    bool running;
    HANDLE vdd, vddThread;

    if (PlugInMonitor(vdd, vddThread, running)) {
        Sleep(5000);
        PlugOutMonitor(vdd, vddThread, running);
    }
}

Preset display modes

All of the following display modes are set by driver default.

Resolution Common name Aspect ratio Refresh rates (Hz)
4096 x 2160 DCI 4K 1.90:1 (256:135) 24/30/60/144/240
3840 x 2160 4K UHD 16:9 24/30/60/144/240
3840 x 1600 UltraWide 24:10 24/30/60/144/240
3840 x 1080 UltraWide 32:9 (2x 16:9 FHD) 24/30/60/144/240
3440 x 1440 21.5:9 (43:18) 24/30/60/144/240
3240 x 2160 3:2 60
3200 x 1800 3K 16:9 24/30/60/144/240
3000 x 2000 3:2 60
2880 x 1800 2.8K 16:10 60
2880 x 1620 2.8K 16:9 24/30/60/144/240
2736 x 1824 60
2560 x 1600 2K 16:10 24/30/60/144/240
2560 x 1440 2K 16:9 24/30/60/144/240
2560 x 1080 UltraWide 21:9 24/30/60/144/240
2496 x 1664 60
2256 x 1504 60
2048 x 1152 60/144/240
1920 x 1200 FHD 16:10 60/144/240
1920 x 1080 FHD 16:9 24/30/60/144/240
1800 x 1200 FHD 3:2 60
1680 x 1050 HD+ 16:10 60/144/240
1600 x 1200 HD+ 4:3 24/30/60/144/240
1600 x 900 HD+ 16:9 60/144/240
1440 x 900 HD 16:10 60/144/240
1366 x 768 60/144/240
1280 x 800 HD 16:10 60/144/240
1280 x 720 HD 16:9 60/144/240

Notes:

  • Low GPUs, e.g GTX 1650 will not support the highest DCI 4K.
  • All resolutions are compatible with 60 Hz refresh rates.

Adapter specs

  • Name: Parsec Virtual Display Adapter
  • Hardware ID: Root\Parsec\VDA
  • Adapter GUID: {00b41627-04c4-429e-a26e-0265cf50c8fa}
  • EDID:
00 FF FF FF FF FF FF 00  42 63 D0 CD ED 5F 84 00
11 1E 01 04 A5 35 1E 78  3B 57 E0 A5 54 4F 9D 26
12 50 54 27 CF 00 71 4F  81 80 81 40 81 C0 81 00
95 00 B3 00 01 01 86 6F  80 A0 70 38 40 40 30 20
35 00 E0 0E 11 00 00 1A  00 00 00 FD 00 30 A5 C1
C1 29 01 0A 20 20 20 20  20 20 00 00 00 FC 00 50
61 72 73 65 63 56 44 41  0A 20 20 20 00 00 00 10
00 00 00 00 00 00 00 00  00 00 00 00 00 00 01 C6
02 03 10 00 4B 90 05 04  03 02 01 11 12 13 14 1F
8A 4D 80 A0 70 38 2C 40  30 20 35 00 E0 0E 11 00
00 1A FE 5B 80 A0 70 38  35 40 30 20 35 00 E0 0E
11 00 00 1A FC 7E 80 88  70 38 12 40 18 20 35 00
E0 0E 11 00 00 1E A4 9C  80 A0 70 38 59 40 30 20
35 00 E0 0E 11 00 00 1A  02 3A 80 18 71 38 2D 40
58 2C 45 00 E0 0E 11 00  00 1E 00 00 00 00 00 00
00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 A6

Visit http://www.edidreader.com/ to view it online or use an advanced tool AW EDID Editor

auto-parsec-vdd's People

Contributors

nomi-san avatar michyprima avatar

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