WM上如何获取当前产生声音的途径信息,比如,声音是从扬声筒,耳机,或者听筒

Question

谢谢!xiexie

Answer 1

No,做不到

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I'm a device.

Answer 2

// HeadsetPresent
// Gets a value indicating whether a headset is present
#define SN_HEADSETPRESENT_ROOT HKEY_LOCAL_MACHINE
#define SN_HEADSETPRESENT_PATH TEXT("System\\State\\Hardware")
#define SN_HEADSETPRESENT_VALUE TEXT("Headset")

// SpeakerPhoneActive
// Gets a value indicating whether the speakerphone is active
#define SN_SPEAKERPHONEACTIVE_ROOT HKEY_LOCAL_MACHINE
#define SN_SPEAKERPHONEACTIVE_PATH TEXT("System\\State\\Hardware")
#define SN_SPEAKERPHONEACTIVE_VALUE TEXT("Speaker")

可以通过这两个注册表项确定吧

Answer 3

WOW! 你说的对，我忘了还有注册表了 ;-)

C++里面要自己注册notification, C#里面直接访问SystemState.HeadsetPresent和SystemState.SpeakerPhoneActive属性即可

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I'm a device.