检查Javascript中的麦克风音量 [英] Checking microphone volume in Javascript

问题描述

我正在尝试制作一个需要访问用户麦克风的小游戏.我需要能够检查麦克风是否已连接，然后，如果连接了麦克风，请在游戏过程中检查通过麦克风的声音音量.我该怎么办?

I'm trying to make a little game that needs access to the users mic. I need to be able to check if a mic is connected, and then if so, check the volume of the sound coming through the mic through the duration of the game. How would I do this?

推荐答案

以下是检测音频控件是否可用的摘要(摘自:

Here is the snippet needed to detect audio controls are available (pulled from: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getUserMedia)

navigator.getUserMedia(constraints, successCallback, errorCallback);

以下是使用getUserMedia函数的示例，该示例使您可以访问麦克风.

Here is a sample using the getUserMedia function that will enable you access to the microphone.

navigator.getUserMedia = navigator.getUserMedia ||
                     navigator.webkitGetUserMedia ||
                     navigator.mozGetUserMedia;

if (navigator.getUserMedia) {
   navigator.getUserMedia({ audio: true, video: { width: 1280, height: 720 } },
      function(stream) {
         console.log("Accessed the Microphone");
      },
      function(err) {
         console.log("The following error occured: " + err.name);
      }
    );
} else {
   console.log("getUserMedia not supported");
}

这里是一个展示您想要的输入量"的存储库.

Here is a repository that demonstrates the "input volume" you desire.

https://github.com/cwilso/volume-meter/

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