c# - 如何在后台通过 HTTP 流式传输 MP3？

Question

有很多关于如何使用后台音频代理的示例，但很少有展示如何使用后台音频流代理的示例，我发现的示例不显示流式 mp3，而是创建假装流。

当我创建一个新的 Windows Phone Audio Streaming Agent 项目时，它会给我:

public class AudioTrackStreamer : AudioStreamingAgent
{
    /// <summary>
    /// Called when a new track requires audio decoding
    /// (typically because it is about to start playing)
    /// </summary>
    /// <param name="track">
    /// The track that needs audio streaming
    /// </param>
    /// <param name="streamer">
    /// The AudioStreamer object to which a MediaStreamSource should be
    /// attached to commence playback
    /// </param>
    /// <remarks>
    /// To invoke this method for a track set the Source parameter of the AudioTrack to null
    /// before setting  into the Track property of the BackgroundAudioPlayer instance
    /// property set to true;
    /// otherwise it is assumed that the system will perform all streaming
    /// and decoding
    /// </remarks>
    protected override void OnBeginStreaming(AudioTrack track, AudioStreamer streamer)
    {
        //TODO: Set the SetSource property of streamer to a MSS source

        NotifyComplete();
    }

    /// <summary>
    /// Called when the agent request is getting cancelled
    /// The call to base.OnCancel() is necessary to release the background streaming resources
    /// </summary>
    protected override void OnCancel()
    {
        base.OnCancel();
    }
}

我如何给它一个像 http://relay.radioreference.com:80/346246215 这样的 MP3 URL让它在后台流式传输？我是否也放了 BackgroundAudioPlayer.Instance.Play(); 来播放它，仅此而已？

Answer 1

是的，这就够了 不需要流媒体，如果您将URL设置为后台代理并调用函数BackgroundAudioPlayer.Instance.Play();后台代理自动流媒体