获取单个 Windows 应用程序当前音量输出级别，如音频混合器中的可视化 [英] Getting individual windows application current volume output level as visualized in audio Mixer

问题描述

我正在尝试编写一个 C# 代码，该代码从访问声音输出的每个 Windows 应用程序输出当前音频输出电平(如图所示，音量混合器的绿色条不断变化).

I am trying to write a C# code that outputs the current audio output level from each of the windows application accessing the sound output (as shown with constantly changing green bars of the Volume mixer).

程序将每 10 毫秒检查一次，并输出如下内容:Windows Media Player:30，Mozilla Firefox:0，Adobe Flash Player:35(如图所示)

The program will check every 10 ms, and outputs sth like this: Windows Media Player: 30, Mozilla Firefox: 0, Adobe Flash Player: 35 (as per the figure)

我正在使用 Windows 7，并在 C# 中尝试它(因为 Java 无法实现这一点).

I am using Windows 7, and trying it in C# (as Java cannot achieve this).

我找到了获取和设置正在运行的应用程序的主音量(Windows Media Player 显示 65% 的手柄栏)的方法，有没有办法获取绿色波动的级别数据?

I have found ways to get and set the Master Volume (the handle bar which shows 65% for Windows Media Player) for a running application, is there a way to get the green fluctuating level data?

谢谢！

推荐答案

您可以使用 CSCore.CoreAudioAPI-Audiosessions 有一个包装器.使用类似的东西(有关更多详细信息，请查看单元测试:AudioSession-UnitTests):

You can use CSCore. There is a wrapper for the CoreAudioAPI-Audiosessions. Use something like that (for more details take a look at the unittests: AudioSession-UnitTests):

private static void Main(string[] args)
{
    using (var sessionManager = GetDefaultAudioSessionManager2(DataFlow.Render))
    {
        using (var sessionEnumerator = sessionManager.GetSessionEnumerator())
        {
            foreach (var session in sessionEnumerator)
            {
                using (var audioMeterInformation = session.QueryInterface<AudioMeterInformation>())
                {
                    Console.WriteLine(audioMeterInformation.GetPeakValue());
                }
            }
        }
    }

    Console.ReadKey();
}

private static AudioSessionManager2 GetDefaultAudioSessionManager2(DataFlow dataFlow)
{
    using (var enumerator = new MMDeviceEnumerator())
    {
        using (var device = enumerator.GetDefaultAudioEndpoint(dataFlow, Role.Multimedia))
        {
            Debug.WriteLine("DefaultDevice: " + device.FriendlyName);
            var sessionManager = AudioSessionManager2.FromMMDevice(device);
            return sessionManager;
        }
    }
}

要控制应用程序的音量，请查看单元测试 此处.

To control an applications volume, take a look at the unit-tests here.

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