How to get list of available devices using Silk.NET.OpenAL?

[asheesh1996]

I want to detect microphone and speakers connected to my windows running dotnet5, I went through this example but it uses default connected device, I want to enumerate though list of devices and play the audio if any examples are available please suggest or any API documentation for getting list of available connected devices?

[Perksey]

Ah apologies, I had an answer written for this the day you opened this but apparently never hit send.

You'll have to use ALContext and its enumaration extensions (which are not guaranteed to be available as they are extensions!)

These are in the Silk.NET.OpenAL.Extensions.Enumeration package. Using this package, you can get a string list containing all available device specifiers. It'll look something like this:

using var alc = ALContext.GetApi();
string deviceSpecifier = "";
if (alc.IsExtensionPresent(null, "ALC_ENUMERATION_EXT"))
{
    using var enumeration = alc.GetExtension<Enumeration>();
    foreach (var device in enumeration.GetStringList(null, GetEnumerationContextStringList.DeviceSpecifiers))
    {
        Console.WriteLine($"Got device \"{device}\"");
        deviceSpecifier = device;
    }
}

var device = alc.OpenDevice(deviceSpecifier);
// ...

[Perksey]

Note I appreciate that the whole IsExtensionPresent/GetExtension thing is ugly. These are handwritten bindings and don't have the unified TryGetExtension that our other bindings do - we have an up-for-grabs issue #574 for fixing this.

[LaXiS96]

The code you provided does not compile/run under v2.7.0.
There is no overload for GetExtension<>() that takes zero arguments, only one that takes a Device* argument.
Even passing null for the Device* argument only results in a runtime exception on the same line:

An unhandled exception of type 'System.MissingMethodException' occurred in System.Private.CoreLib.dll
Constructor on type 'Silk.NET.OpenAL.Extensions.Enumeration.Enumeration' not found.

This was the test code:

using System;
using Silk.NET.OpenAL;
using Silk.NET.OpenAL.Extensions.Enumeration;

namespace ConsoleApp1
{
    class Program
    {
        static unsafe void Main(string[] args)
        {
            using var alc = ALContext.GetApi(true);

            if (alc.IsExtensionPresent(null, "ALC_ENUMERATION_EXT"))
            {
                using var enumeration = alc.GetExtension<Enumeration>(null);
                foreach (var device in enumeration.GetStringList(GetEnumerationContextStringList.DeviceSpecifiers))
                {
                    Console.WriteLine(device);
                }
            }
        }
    }
}

Installed NuGet packages:

• Silk.NET.OpenAL 2.7.0
• Silk.NET.OpenAL.Extensions.Enumeration 2.7.0
• Silk.NET.OpenAL.Soft.Native 1.21.1.1

[Perksey]

In #598 and #602 we fix the behaviour you're encountering by:

• adding a TryGetExtension method to eliminate the error-prone IsExtensionPresent/GetExtension pair
• fixing a lot of extension-related bugs

This will be in the 2.8 update which will be released as soon as a couple of PRs are merged.