[英]Audio level meter for NAudio recording
I´m recording audio to a WAV file using NAudio library. 我正在使用NAudio库将音频录制到WAV文件。 I want to be able to update a ProgressBar to the value of audio level/volume as the sample data arrives. 我希望能够在示例数据到达时将ProgressBar更新为音频级别/音量的值。
public WaveIn Recorder_NAudio;
public WaveFileWriter Writer_NAudio;
public void record()
{
Recorder_NAudio = new WaveIn();
Recorder_NAudio.WaveFormat = new NAudio.Wave.WaveFormat(sampleRate, 1);
Writer_NAudio = new WaveFileWriter(File.Open(tempPath, FileMode.Create), Recorder_NAudio.WaveFormat);
Recorder_NAudio.DataAvailable += new EventHandler<WaveInEventArgs>(Recorder2_DataAvailable);
Recorder_NAudio.StartRecording();
}
void Recorder2_DataAvailable(object sender, WaveInEventArgs e)
{
if (Writer_NAudio != null) if (Writer_NAudio.CanWrite)
{
Writer_NAudio.WriteData(e.Buffer, 0, e.BytesRecorded);
// I need help to create this function
ProgressBar1.value = GetVolumeFromBytes(e.buffer);
}
}
For a Windows Forms example, have a look at the NAudioDemo source code and in particular the AudioPlaybackPanel
class, which uses a MeteringSampleProvider
and subscribes to its StreamVolume
event to set the properties on a custom volume meter control (included in NAudio) 对于Windows窗体示例,请查看NAudioDemo源代码,特别是AudioPlaybackPanel
类,它使用MeteringSampleProvider
并订阅其StreamVolume
事件以设置自定义音量计控件(包含在NAudio中)的属性
For a WPF example, look at voicerecorder.codeplex.com which uses a similar technique and the volume metering is described in this article . 对于WPF示例,请查看使用类似技术的voicerecorder.codeplex.com , 本文介绍了音量计量。
I wrote a control that does everything you want to control can be found here . 我写了一个控件,可以在这里找到你想控制的一切。
For use with NAudio is sufficient to define a device as: 与NAudio一起使用足以将设备定义为:
Private NAudio.CoreAudioApi.MMDevice device;
then at any time you know the value of the audio levels of the following values: 然后在任何时候你知道以下值的音频电平的值:
Master : 师父:
device.AudioMeterInformation.MasterPeakValue;
Left : 剩下 :
device.AudioMeterInformation.PeakValues[0];
Right : 对 :
device.AudioMeterInformation.PeakValues[1];
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