Question

我正在为我的应用程序开发一个audiobackend，它运行在Mono / .NET上。因此我发现，SFML是平台依赖的，因此它适合。但由于许可，没有mp3支持。

所以我想在C＃中为自己添加mp3功能。我使用SFML.Net 2.1和Mp3Sharp（http://www.robburke.net/mle/mp3sharp/）。起初我试过这个：

Mp3Stream stream = new Mp3Stream("D:\\tmp\\test.mp3");
Music music = new Music(stream);
music.play();

但那没用。例外：

AudioCuesheetEditor.AudioBackend.AudioManagerSFML: FATAL | SFML.LoadingFailedException: Failed to load music from memory
at SFML.Audio.Music..ctor(Stream stream)
at AudioCuesheetEditor.AudioBackend.AudioManagerSFML.setMusic() in d:\tmp\AudioCuesheetEditor\src\AudioCuesheetEditor\AudioBackend\AudioManagerSFML.cs

所以我考虑过在示例中完成（https://github.com/LaurentGomila/SFML/wiki/Source:-MP3-Player）：

我创建了一个扩展SoundStream的类SFMLMp3Stream：

public class SFMLMp3Stream : SoundStream
{
    private Mp3Stream stream;

    public SFMLMp3Stream()
    {
        stream = null;
    }

    public Boolean openFromFile(String _filename)
    {
        //TODO:Check file existence
        stream = new Mp3Stream(_filename);
        Initialize((uint)stream.ChannelCount,(uint) stream.Frequency);
        return true;
    }

    #region implemented abstract members of SoundStream

    protected override bool OnGetData(out short[] samples)
    {
        if (stream != null)
        {
            byte[] buffer = new byte[512];
            short[] retVal = new short[512];
            stream.Read(buffer,0,buffer.Length);
            Buffer.BlockCopy(buffer,0,retVal,0,buffer.Length);
            samples = retVal;
            return true;
        }
        else
        {
            samples = null;
            return false;
        }
    }

    protected override void OnSeek(TimeSpan timeOffset)
    {
        if (stream != null)
        {
            stream.Seek((long)timeOffset.TotalMilliseconds, SeekOrigin.Current);
        }
    }

    #endregion
}

当我现在尝试这个时：

musicStream = new SFMLMp3Stream();
musicStream.openFromFile(this.objProgram.getObjCuesheet().getAudiofilePath(true));
music = new Music(musicStream);

我收到编译错误，音乐不能从SFMLMp3Stream启动（因为它没有字符串而没有System.IO.Stream。如何扩展SFML用于Mp3用途？到目前为止有人这样做了吗？

感谢您的帮助斯文

添加mp3支持到SFML.NET

0 个答案: