My system has two graphics cards installed: a Quadro FX 1500, which supports up to DirectX 9, and a Quadro 600, which supports up to DirectX 11. I'm writing a C# application (using the SharpDX wrapper library) against DirectX 11, so I want to make sure that I'm always choosing the Quadro 600 as my device. Will DirectX 11 select the correct device/graphics card by default, or if not, is there a way I can enumerate the devices on my system and choose the one that supports DirectX 11?
Right now my device initialization code looks like this:
//which device do we get?
SharpDX.Direct3D11.Device defaultDevice = new SharpDX.Direct3D11.Device(DriverType.Hardware, DeviceCreationFlags.Debug);
Thanks!
In order to create a device for a specific adapter, you need to pass it as argument in the device constructor.
First get the device index that you need :
SharpDX.DXGI.Factory f = new SharpDX.DXGI.Factory1();
SharpDX.DXGI.Adapter a = f.GetAdapter(adapterindex);
FeatureLevel[] levels = new FeatureLevel[]
{
#if DIRECTX11_1
FeatureLevel.Level_11_1,
#endif
FeatureLevel.Level_11_0,
FeatureLevel.Level_10_1,
FeatureLevel.Level_10_0,
FeatureLevel.Level_9_3
};
DeviceCreationFlags flags = DeviceCreationFlags.BgraSupport;
var dev = new Device(a, flags, levels);
To find the right adapter, you can loop GetAdapter function, and use Description to find the one you need.
Please note that you should not use the Hardware flag in case you specify a device manually. BgraSupport is common practice.
Related
The following code works well
AudioManager am = (AudioManager)this.GetSystemService(Context.AudioService);
am.RingerMode = RingerMode.Vibrate;
So after running it the ring volume gets to 0, but I would want to set it to a custom value like for instance "57".
To do this I used the following code:
AudioManager am = (AudioManager)this.GetSystemService(Context.AudioService);
am.SetStreamVolume(Stream.Ring, 57, 0);
After this code runs nothing changed to my ring volume, I expected that it will change to a "57" value.
I am using latest Xamarin libraries on a Android 7.0 version. I need to implement this only for Android.
Is this custom ring volume set a limitation ?
What should this am.SetStreamVolume(Stream.Ring, 57, 0); actually do (if it is not changing the ring volume of the phone).
You could use GetStreamMaxVolume firstly to get the maximum value for a particular stream, then set a proper number smaller than the maximum value.
Hello I displayed 1 webcam preview in UWP and that was a success.
But now I want to use 2 camera's preview on my program or be able to choose between the two cameras while connected 2 cameras on computer.
When I run 1 webcam preview, I referred to documentation on using MediaCapture and it was good.
But now I don't know how to display 2 camera previews or select a one between cameras.
Is it impossible?
Yes, it is possible :-) . The MediaCapture class takes the default camera when you call the InitializeAsync method without parameters, but there is another overload that allows you to specify the device ID.
The documentation shows how to discover video capture devices:
DeviceInformationCollection devices =
await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
Now you can initialize multiple MediaCapture instances like this:
foreach ( var device in devices )
{
var mediaInitSettings =
new MediaCaptureInitializationSettings { VideoDeviceId = device.Id };
MediaCapture mediaCapture = new MediaCapture();
mediaCapture.InitializeAsync(mediaInitSettings);
//do something with the media capture
}
Naturally, when you want to display multiple previews, you will need to have multiple CaptureElements, each set to the specific MediaCapture instance you want.
However this approach is quite simplified. To make sure the concurrent capture and preview is supported, you must first ensure to query only cameras that support device profile using MediaCapture.IsVideoProfileSupported method as shown in the documentation and then also check find a concurrency-enabled profile common for both cameras - MediaCapture.FindConcurrentProfiles, see docs. Only then you can safely create the two previews and know the app will not crash.
I need to develop a screen capture program that runs on Mac OS X Lion. I tried to make a screenshot using mono and GTK#, but the screenshot is black
Gdk.Window window = Gdk.Global.DefaultRootWindow;
if (window!=null)
{
Gdk.Pixbuf pixBuf = new Gdk.Pixbuf(Gdk.Colorspace.Rgb, false, 8,
window.Screen.Width, window.Screen.Height);
pixBuf.GetFromDrawable(window, Gdk.Colormap.System, 0, 0, 0, 0,
window.Screen.Width, window.Screen.Height);
pixBuf.ScaleSimple(400, 300, Gdk.InterpType.Bilinear);
pixBuf.Save("screenshot0.jpeg", "jpeg");
}
Can you point me in right direction. Preferably using mono, but if will be java, c++ or objective c is also good.
Thank in advance.
For Java, see Robot.createScreenCapture(Rectangle). Note though, that Robot commonly also produces a black screen image for apps. that take direct control of the screen area (e.g. many games).
Your best bet would probably be using a platform-specific API to do the actual image capture, while the rest of your app remains portable. For OS X, Apple actually provides sample code on how to do this, and your code will probably work under X11.
I recently found out about the surface & device class which may solve my problems with screenshoting a fullscreen direct3d game.
I've tried following this article : fastest method to capture game screen shots in c#?(more than20 images per second)
First method i've tried is :
Device device = new Device(0, DeviceType.Default, GetForegroundWindow(), CreateFlags.None, new PresentParameters());
Surface s2 = device.CreateImageSurface(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, Format.A8R8G8B8);
device.GetFrontBuffer(s2);
SurfaceLoader.Save("c:\\Screenshot.bmp", ImageFileFormat.Bmp, s2);
second method i've tried is :
Device device = new Device(0, DeviceType.Default, GetForegroundWindow(), CreateFlags.None, new PresentParameters());
Surface s1 = device.GetBackBuffer(0, BackBufferType.Mono);
device.GetFrontBuffer(s1);
On both methods the device would report a dll it can't find (Unable to load DLL 'netcfd3dm2_0.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E))
I got confused from that other article. Anyone with experience in this area can sort things out?
Seems you missing file that comes with Compact Framework. Try install/reinstall compact framework
I wanted to know, what would the coding be if I wanted to toggle mute/unmute of my microphone. I am making a program that can run in the background and pickup a keypress event and toggle mute/unmute of the mic. Any help with any of that coding would be very helpful. I am pretty new to C#, and this is just a really simple program I wanted to make. That is all it does, is it will listen for keypress of the spacebar, even when the program is in the background, then when the spacebar is pressed it will mute/unmute the mic.
Thank you for any and all help!
For Windows Vista and newer, you can no longer use the Media Control Interface, Microsoft has a new Core Audio API that you must access to interface with audio hardware in these newer operating systems.
Ray Molenkamp wrote a nice managed wrapper for interfacing with the Core Audio API here:
Vista Core Audio API Master Volume Control
Since I needed to be able to mute the microphone from XP, Vista and Windows 7 I wrote a little Windows Microphone Mute Library which uses Ray's library on the newer operating systems and parts of Gustavo Franco's MixerNative library for Windows XP and older.
You can download the source of a whole application which has muting the microphone, selecting it as a recording device, etc.
http://www.codeguru.com/csharp/csharp/cs_graphics/sound/article.php/c10931/
you can use MCI (Media Control Interface) to access mics and change their volume system wise. Check the code below it should be setting volume to 0 for all system microphones. Code is in c; check pinvoke for details on how to translate this code to c#
#include "mmsystem.h"
...
void MuteAllMics()
{
HMIXER hmx;
mixerOpen(&hmx, 0, 0, 0, 0);
// Get the line info for the wave in destination line
MIXERLINE mxl;
mxl.cbStruct = sizeof(mxl);
mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
// find the microphone source line connected to this wave in destination
DWORD cConnections = mxl.cConnections;
for (DWORD j=0; j<cConnections; j++)
{
mxl.dwSource = j;
mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_SOURCE);
if (MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE == mxl.dwComponentType)
{
// Find a volume control, if any, of the microphone line
LPMIXERCONTROL pmxctrl = (LPMIXERCONTROL)malloc(sizeof MIXERCONTROL);
MIXERLINECONTROLS mxlctrl =
{
sizeof mxlctrl,
mxl.dwLineID,
MIXERCONTROL_CONTROLTYPE_VOLUME,
1,
sizeof MIXERCONTROL,
pmxctrl
};
if (!mixerGetLineControls((HMIXEROBJ) hmx, &mxlctrl, MIXER_GETLINECONTROLSF_ONEBYTYPE))
{
DWORD cChannels = mxl.cChannels;
if (MIXERCONTROL_CONTROLF_UNIFORM & pmxctrl->fdwControl)
cChannels = 1;
LPMIXERCONTROLDETAILS_UNSIGNED pUnsigned = (LPMIXERCONTROLDETAILS_UNSIGNED)
malloc(cChannels * sizeof MIXERCONTROLDETAILS_UNSIGNED);
MIXERCONTROLDETAILS mxcd =
{
sizeof(mxcd),
pmxctrl->dwControlID,
cChannels,
(HWND)0,
sizeof MIXERCONTROLDETAILS_UNSIGNED,
(LPVOID) pUnsigned
};
mixerGetControlDetails((HMIXEROBJ)hmx, &mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
// Set the volume to the middle (for both channels as needed)
//pUnsigned[0].dwValue = pUnsigned[cChannels - 1].dwValue = (pmxctrl->Bounds.dwMinimum+pmxctrl->Bounds.dwMaximum)/2;
// Mute
pUnsigned[0].dwValue = pUnsigned[cChannels - 1].dwValue = 0;
mixerSetControlDetails((HMIXEROBJ)hmx, &mxcd, MIXER_SETCONTROLDETAILSF_VALUE);
free(pmxctrl);
free(pUnsigned);
}
else
{
free(pmxctrl);
}
}
}
mixerClose(hmx);
}
here you can find more code on this topic
hope this helps, regards
I have several microphones in win7 and class WindowsMicrophoneMuteLibrary.CoreAudioMicMute is incorrect in this case.
so I change the code and works great because now his cup Whistle all microphones and not just in the last recognized by win7.
I am attaching the new class to put in place.
http://www.developpez.net/forums/d1145354/dotnet/langages/csharp/couper-micro-sous-win7/