Have been struggling with finding a way to stream audio, from a file or web, to a specific output device, not just the default one. Tried using mciSendString and while the open command does accept a device id/filename I haven't found a way to make use of it, am not even sure if this is what I am looking for or not, but considering it says ... or the filename of the device driver am guessing yes(?), but correct me if I am wrong, and this isn't a specify your output device type parameter.
If it is the correct thing then how do you enumerate the installed device drivers, have looked into the IMMDevice interface because it seamed like it could have the file names stored in the registry, but non of the output device registry keys had a driver filename type value entry, or at least I haven't found one.
So my question is, how would you go about streaming audio to a specific output device, it doesn't have to be done through mciSendString, that's just something I looked into as it's one of the most talked about function when it comes to playing audio.
Note: please do not recommend me 3rd party libraries like NAudio, the reason I am asking this question is not get recommendations for libraries, otherwise I would have already used one and would have never written this, have just seen a lot of answers be like: Use {LibName}, it has what you want or something along those lines.
In case what's written is odd or incorrectly worded in places, basically this is what the end goal should be:
Installed Output Devices:
- Output1
- Output2
- Output3
Method For Playing:
//will play x.mp3 through output device 1
PlayAudio(output: "Output1", mp3File: "x.mp3");
//will play x.mp3 through output device 2
PlayAudio(output: "Output2", mp3File: "x.mp3");
//will play x.mp3 through output device 3
PlayAudio(output: "Output3", mp3File: "x.mp3");
You seem to be looking for this API：mciSendCommand()
To set the WaveAudio device (soundcard) used by the Multimedia
Control, you must use the mciSendCommand API. The Multimedia Control
does not directly provide a method to let you set the device used for
playing or recording.
Call mciSendCommand() with MCI_SET & MCI_WAVE_SET_PARMS
setting wOutput to the desired playback device's ID.
Then get IDDevice for mciSendCommand() via
mciGetDeviceID("waveaudio")
Its not 100% clear what wOutput wants, its probably the same ID as returned by waveOutGetDevCaps()
I am just a porter.
Please refer:
https://stackoverflow.com/a/13320137/11128312
https://stackoverflow.com/a/10968887/11128312
Related
I want to add a backup functionality to my app in the sense that the app will allow users to create a self-contained environment (data + executable + autorun.inf file) on an external device (CD, CD-ROM or USB key) so that users can retrieve (in read only mode) their stored environment at a given point in time.
I've read here about making an auto-bootable USB (which I suspect will be the same for a CD or DVD).
edit I meant "auto-executing", not "auto-bootable"!
I know about IMAPI or other approaches that are now several years old. Is there any alternative/standard approach to create media this way? I'd like a generic way to create either CD/DVD or USB devices (non-bootable).
You need to make sure to not confuse Booting and Windows Autorun.
auto-bootable USB
refers to an external USB drive from which you can boot your computer.
I doubt that's what you are looking for, given the linked Stackexchange question. The information you already found is actually what you are looking for, and the advice given there seems pretty accurate.
What you need to do is:
Create the media with your data. In case of USB sticks this is as easy as copying the data to the stick. Optical media (CD/DVD) need to be burned, and that can only be done using the Windows API, which has already be discussed here.
If you want to use the Windows autorun feature (which I would ignore*), you'll need to create a file called Autorun.ini in the root directory of your media. You already have found the required content of that file here.
* Why I would skip the autorun feature.
First of all, there's no real alternative to the Windows autorun feature.
It was controversial, at best, in earlier versions of Windows. Since USB sticks went mainstream, autorun became nothing more than an automatic virus installation feature. Soon after everyone started disabling it. Because of this recent versions of Windows seem to have dropped it or disable it by default.
An exception to this would be the Icon=diskicon.ico option, which allows you to change the icon of the drive. This might be still working, even if autorun is disabled.
For my project I need a way to get data regarding screens that are connected.
In specific, I need to identify whether a monitor is a laptop internal screen or an external screen, and get all the screen data.
I need to get this information both in c++ and C#.
I read about Win32_DesktopMonitor, about EnumDisplayDevices and about Screen Class.
I read also some related questions here:
Monitor ID and Serial Number
Find Number and resolution to all monitors
EnumDisplayDevices vs WMI Win32_DesktopMonitor, how to detect active monitors?
I havn't found an answer yet. Any Ideas?
To get the information whether monitor is internal you can use WMI class WmiMonitorConnectionParams from root\wmi namespace.
Code would need to create a CimSession by connecting to WMI either through DCOM or WinRM (with authentication as needed if enumerating remote computer monitors), then call EnumerateInstances(#"root\wmi", "WmiMonitorConnectionParams") on that session.
Resulting collection will contain InstanceName (string) and VideoOutputTechnology (UInt32).
You will need both for each monitor so you can match them with the other stuff you need.
If VideoOutputTechnology is 0xFFFFFFFF, then that's the Default Monitor entry and it can be ignored. If it is 0x80000000, then it is internal. Other types of connection are documented in d3dkmdt.h header file (online documentation at the moment of this writing does not provide correct values for the enum).
The most reliable way to get model, serial number, as well as year and week of manufacture is by reading and parsing the raw EDID block (by calling WmiGetMonitorRawEEdidV1Block).
I hope you can get by on your own from here.
What you can do is query the Windows WMI classes:
http://msdn.microsoft.com/en-us/library/aa394554(v=vs.85).aspx
Those classes allows the user to collect various information about the computer (hardware, os, ...)
I don't know if you'll find the properties you need, but it might be worth a look.
You're looking for this class:
http://msdn.microsoft.com/en-us/library/aa394122(v=vs.85).aspx
I did a lot of search and it comes with nothing.Such as below:
c# check printer status
how do i check if a printer is installed and ready using C#?
I tried all the code I found in here but none of them can tell the status of a printer's power is on or off.
The printer is always plugged in and sometimes it's powered off, so I need to make sure it's powered on and then do the print job.
Real need some help here!
question update
the windows still send the print job to print spool when my printer is off, I don't need this, because my client sometimes will deliberately turn off the printer to avoid print something that he don't need. but windows still send it to spool, when my client turn on the printer again, it prints the thing that exactly he want to avoid.
The legacy code uses kernel32.dll's CreateFile function to open LPT1 as a file and directly write string to it to accomplish then printing function. It got no way to know the status of the printer, it just write string to the parallel port. so when the printer is off, the write function got no return, hence the following code after that will never get executed.
hopefully u can understand what I am trying to do here. I want to avoid the situation to print when the printer is off.
Could anyone please give me any idea as to where to start my coding in order to get data from OPOS(Datalogic Magellan device) weighting and barcode scanning in C#?? For example, what library and what function I should be using for this case. I am clueless as I have already spent numerous of hours searching for an answer online. Not even came close online.
I don't know any api that I can use to get the weight and barcode for the usb device into my C# program.
I am currently using Datalogic scale. I tried the build-in windows reader but it didn't read in any data from the device.
First off, I used the Microsoft.PointOfService library which can directly create connection to most of the opos base machine. And make sure you have your Logical Device Name right! Very Very important. This is NOT any normal name you found in your regedit, it MUST be define manually by yourself inside the opos adk program that you installed along with the opos machine.
Then you can pass in the name as usual in your C# program.
For example: you set USB_Scale as your logical device name inside OPOS program
in C#
this.myDevice = explore.GetDevice("Scale", "USB_Scale");
Note: Make sure you set claim to 1000; It might not work if you didn't do so.
Also : this.myScale = ((Scale)explore.CreateInstance(myDevice)); <- this might help~
The rest is just straight forward.
I'm trying to index every music file in a folder and play them at random (without repeating) with the default application on my system. For example:
ogg - itunes
mp3 - WMP
mp4 - quicktime
Are there tutorials that will help me with this? Thanks!
Well, once you have a list of files, if you want to come up with a (pseudo)-random permutation of them, what you want is a shuffle algorithm, like Knuth-Fisher-Yates.
If you have a single filename and you want to open it with the default application, you can probably use:
System.Diagnostics.Process.Start(mp3FileName);
See also the MSDN documentation on Process.Start.
This will behave equivalently to just double-clicking on the files in whatever order the shuffle comes up with. Depending on your media player, that may be good enough. However, unless you somehow know how long each media file is, you won't know how long to wait before starting the next one, and I don't think there's any way to wait for the music player to finish playing the media file without having special-case code specific to each player.
You may be able to use the Verb property of the ProcessStartInfo object to select "Enqueue" or something similar, which may do exactly what you want. Again, MSDN has some additional information on ProcessStartInfo.Verb that may be helpful to you.