如何检测使用C＃播放的媒体？

Question

I would like to know how to detect if current windows is playing any kind of media (video, music, etc) similar to what energy settings do to decide if the computer can enter sleep/hibernate mode?

I'm trying to detect how long the computer is idle. I'm currently using the GetLastInputInfo from user32.dll but it just take in consideration the user input, but not if there is any media playing which should not consider the computer idle.

I tried to find C# APIs or native invocations but can't find the information. I'm using latest version of .NET Framework.

Answer 1

Generally speaking, programs don't declare that they are playing media - instead they call SetThreadExecutionState to tell Windows that the computer should not sleep.

That said - Windows 10 recently added support for programs to declare to the OS that they are currently playing media so that they're integrated with Windows' media controls (like how on iOS any program playing video or audio can be controlled from the Control Center).

Here's what appears on my screen when I nudge my volume control:

...however Chrome is being buggy here because I'm not actually playing any media in Chrome but it's telling Windows that it is.

I don't know what Windows API is used to set this - or which API is used to check it - but it isn't very widely used - even Windows' built-in Windows Media Player 12 doesn't use it.