nlayer mpegfile到sfml(.NET)音乐
题
我目前正在寻找一些方法来扩展sfml.net以使用mp3。因此,Ioctllr推荐的nlayer,我想尝试。这是我的方法:
namespace AudioCuesheetEditor.AudioBackend
{
public class SFMLMp3Stream : Stream
{
private static readonly Logfile log = Logfile.getLogfile(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
private MpegFile file;
public SFMLMp3Stream(String _filename)
{
//TODO:Check file existence
file = new MpegFile(_filename);
log.debug("file = " + file.ToString());
}
#region implemented abstract members of Stream
public override void Flush()
{
file.Position = 0;
}
public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
file.Position = offset;
break;
case SeekOrigin.Current:
file.Position = file.Position + offset;
break;
case SeekOrigin.End:
break;
}
return file.Position;
}
public override void SetLength(long value)
{
//TODO?
int i = 1;
}
public override int Read(byte[] buffer, int offset, int count)
{
return file.ReadSamples(buffer, offset, count);
}
public override void Write(byte[] buffer, int offset, int count)
{
throw new NotImplementedException();
}
public override bool CanRead
{
get
{
return true;
}
}
public override bool CanSeek
{
get
{
return file.CanSeek;
}
}
public override bool CanWrite
{
get
{
//Writing to stream is prohibited
return false;
}
}
public override long Length
{
get
{
return file.Length;
}
}
public override long Position
{
get
{
return file.Position;
}
set
{
file.Position = value;
}
}
#endregion
}
.
}
以这种方式使用:
musicStream = new SFMLMp3Stream(this.objProgram.getObjCuesheet().getAudiofilePath(true));
try
{
music = new Music(musicStream);
}
catch(Exception ex)
{
log.fatal(ex.ToString());
}
.
我从sfml获得异常:
05.06.2014 10:34:28 AudioCuesheetEditor.AudioBackend.AudioManagerSFML: FATAL | SFML.LoadingFailedException: Failed to load music from memory
bei SFML.Audio.Music..ctor(Stream stream)
bei AudioCuesheetEditor.AudioBackend.AudioManagerSFML.setMusic() in d:\tmp\AudioCuesheetEditor\src\AudioCuesheetEditor\AudioBackend\AudioManagerSFML.cs:Zeile 50.
.
我读取sfml,它需要pcm 16位符号整数(http://en.sfml-dev.org/forums/index.php?topic=1406.0 )。nlayer是否支持这个?我如何更改代码,它有效?
感谢您的帮助。 Sven
解决方案
不满意的音乐课并不提供读取mp3流。
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