class Sound
{
private NAudio.Wave.BlockAlignReductionStream stream = null;
private NAudio.Wave.DirectSoundOut output = null;
private string fileName;
public Sound(string fileName)
{
this.fileName = fileName;
}
public void PlaySound()
{
if(fileName.EndsWith(".mp3"))
{
NAudio.Wave.WaveStream pcm = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(fileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else if (fileName.EndsWith(".wav"))
{
NAudio.Wave.WaveStream pcm = new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(fileName));
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
}
else throw new InvalidOperationException("Not a correct audio file type.");
output = new NAudio.Wave.DirectSoundOut();
output.Init(stream);
output.Play();
output.Volume = 0.5f;
}
public void Volume(float vol)
{
}
public void PausePlay()
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Pause();
else if (output.PlaybackState == NAudio.Wave.PlaybackState.Paused) output.Play();
}
}
public void Pause()
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Pause();
}
}
public void Play()
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Paused) output.Play();
}
}
public void DisposeWave()
{
if (output != null)
{
if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Stop();
output.Dispose();
output = null;
}
if (stream != null)
{
stream.Dispose();
stream = null;
}
}
public bool Over()
{
if (stream.Position == stream.Length)
return true;
return false;
}
public void Loop()
{
if (Over())
{
stream.Position = 0;
output.Play();
}
}
我真的不知道这里的问题是什么，如果能帮忙就太好了，我正在尝试更改输出音频的音量。
当我编译这段代码时，在 output.volume = 0.5 处出现了一个错误。错误信息如下：
在 DirectSoundOut 上设置音量不受支持，请调整您的 WaveProvider 的音量。
new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(fileName))技巧，它帮助我在使用 Mp3FileReader 时访问Volume属性（该属性本身不包含在其中）。 - Sam