通过蓝牙流音频

本文介绍了通过蓝牙流音频的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的蓝牙连接正常.连接后，我称之为写功能，该功能将流发送到另一台设备.它是这样的:

I have a Bluetooth connection that works ok. When connected, I call this write function, that sends a stream to another device. It goes like this:

public void Write(byte[] bytes) { System.Threading.Tasks.Task.Run(() => { int offset = 0; int count = 10; int len = bytes.Length; while (offset < len) { try { mmOutStream.Write(bytes, offset, Math.Min(count, len - offset)); offset += count; } catch (IOException ex) { System.Diagnostics.Debug.WriteLine("Error occurred when sending data", ex); } } }).ConfigureAwait(false); }

这应该流传输10个字节的字节数组.然后在另一台设备上，我将此读取方法称为:

This should stream a byte array of 10 bytes. Then On onother device, I call this read method:

public void Read() { System.Threading.Tasks.Task.Run(() => { MediaPlayer player = new MediaPlayer(); try { byte[] myReadBuffer = new byte[1024]; int numberOfBytesRead = 0; do { numberOfBytesRead = mmInStream.Read(myReadBuffer, 0, myReadBuffer.Length); player.Prepared += (sender, e) => { player.Start(); }; player.SetDataSource(new StreamMediaDataSource(new System.IO.MemoryStream(myReadBuffer))); player.Prepare(); } while (mmInStream.IsDataAvailable()); } catch (IOException ex) { System.Diagnostics.Debug.WriteLine("Input stream was disconnected", ex); } }).ConfigureAwait(false); }

如果我将整个数组放入，则StreamMediaDataSource可以正常工作，但这将返回无法解析Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource的超类； (388)

The StreamMediaDataSource works fine, if I put the entire array in, but this return the Unable to resolve superclass of Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource; (388)

方法如下:

public class StreamMediaDataSource : MediaDataSource { System.IO.Stream data; public StreamMediaDataSource(System.IO.Stream Data) { data = Data; } public override long Size { get { return data.Length; } } public override int ReadAt(long position, byte[] buffer, int offset, int size) { data.Seek(position, System.IO.SeekOrigin.Begin); return data.Read(buffer, offset, size); } public override void Close() { if (data != null) { data.Dispose(); data = null; } } protected override void Dispose(bool disposing) { base.Dispose(disposing); if (data != null) { data.Dispose(); data = null; } } }

那么我将如何以这种方式播放音频?

So how would I play the audio this way?

但是，通过使用此答案，我得到了这个错误:

But, by using this answer, I get this error:

12-01 20:54:38.887 D/AbsListView(12444): Get MotionRecognitionManager 12-01 20:54:38.947 W/ResourceType(12444): Failure getting entry for 0x010802c9 (t=7 e=713) in package 0 (error -75) 12-01 20:54:45.073 V/BluetoothSocket.cpp(12444): initSocketNative 12-01 20:54:45.073 V/BluetoothSocket.cpp(12444): ...fd 53 created (RFCOMM, lm = 26) 12-01 20:54:45.073 V/BluetoothSocket.cpp(12444): initSocketFromFdNative 12-01 20:54:45.113 D/BluetoothUtils(12444): isSocketAllowedBySecurityPolicy start : device null 12-01 20:54:46.364 V/BluetoothSocket.cpp(12444): connectNative 12-01 20:54:46.424 V/BluetoothSocket.cpp(12444): ...connect(53, RFCOMM) = 0 (errno 115) 12-01 20:54:46.484 I/Choreographer(12444): Skipped 88 frames! The application may be doing too much work on its main thread. 12-01 20:54:51.669 V/MediaPlayer(12444): constructor 12-01 20:54:51.679 V/MediaPlayer(12444): setListener 12-01 20:54:51.719 W/dalvikvm(12444): Unable to resolve superclass of Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource; (388) 12-01 20:54:51.719 W/dalvikvm(12444): Link of class 'Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource;' failed 12-01 20:54:55.693 V/MediaPlayer(12444): constructor 12-01 20:54:55.693 V/MediaPlayer(12444): setListener 12-01 20:54:55.703 W/dalvikvm(12444): Unable to resolve superclass of Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource; (388) 12-01 20:54:55.703 W/dalvikvm(12444): Link of class 'Lmd5c539bdc79f76d0c80e6cd44011eba829/StreamMediaDataSource;' failed Thread finished: <Thread Pool> #5 The thread 0x5 has exited with code 0 (0x0).

推荐答案

好吧，我的重点只是将流传递到MediaSource中，如下所示:

Well my main point is just passing the stream into MediaSource like below :

public void Read() { System.Threading.Tasks.Task.Run(() => { MediaPlayer player = new MediaPlayer(); try { player.Prepared += (sender, e) => { player.Start(); }; player.SetDataSource(new StreamMediaDataSource(mmInStream)); player.Prepare(); } catch (IOException ex) { System.Diagnostics.Debug.WriteLine("Input stream was disconnected", ex); } }).ConfigureAwait(false); }

并且您在MediaSource实施中将查找操作删除了，因为它是网络流.如果要进行流式传输，则必须将其复制到MemoryStream;

And your in your MediaSource implementation remove seeking operation as it is a network stream. And if you want streaming you have to copy it to a MemoryStream;

public class StreamMediaDataSource : MediaDataSource { ... public override int ReadAt(long position, byte[] buffer, int offset, int size) { // data.Seek(position, System.IO.SeekOrigin.Begin); remove seeking return data.Read(buffer, offset, size); } ... // rest of your code remains same. }