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我想要接收语音流并播放它。所以我配置了套接字并且接收工作正常，但是我在正确播放我的流时遇到了问题。我完全确定我的传入流没问题。在安卓和iOS上测试。

接收流

private async void SocketOnMessageReceived(DatagramSocket sender, DatagramSocketMessageReceivedEventArgs args)
        {
            var result = args.GetDataStream();
            var resultStream = result.AsStreamForRead(4096);

            using (var reader = new StreamReader(resultStream))
            {
                var audio = await reader.ReadToEndAsync();
                Deployment.Current.Dispatcher.BeginInvoke(() =>
                {
                    Debug.WriteLine("audio.length "+audio.Length);
                    AudioSteam.AddBytes(audio);

                });
            }
        }

为了播放声音，我修改了本教程的一些代码

我修改后的代码

protected override void GetSampleAsync(MediaStreamType mediaStreamType)
        {

            // Send out the sample
            ReportGetSampleCompleted(new MediaStreamSample(mediaStreamDescription,
                                                            memoryStream,
                                                            0,
                                                            BufferSize,
                                                            timestamp,
                                                            mediaSampleAttributes));
            // Prepare for next sample
            timestamp += BufferSamples * 10000000L / sampleRate;

        }

并为流提供添加一种方法

 public void AddBytes(string bytes) {            
            var audioBytes = System.Text.Encoding.UTF8.GetBytes(bytes);
            memoryStream.Seek(0, SeekOrigin.Begin);
            memoryStream.Write(audioBytes,0,audioBytes.Length);

        }

怎么了？在哪个部分，接球还是打球，我搞砸了？

更新：看起来 ui 线程不是阅读连续声音的最佳方式。所以我摆脱了它，现在接收方法看起来像这样

private void SocketOnMessageReceived(DatagramSocket sender, DatagramSocketMessageReceivedEventArgs args)
        {
            var result = args.GetDataStream();
            var resultStream = result.AsStreamForRead(4096);

            var reader = new StreamReader(resultStream);
                var audio = reader.ReadToEnd();
                AudioSteam.AddBytes(audio);

        }

更重要的是，它可能是 MediaSourceStream 的错误设置。ATM是这样设置的

            const int ChannelCount = 1;
            const int BitsPerSample = 2;
            const int BufferSamples = 16;
            const int BufferSize = 4096; //same as max buffer for iOS and Android        

    protected override void OpenMediaAsync()
            {
                int byteRate = sampleRate * ChannelCount * BitsPerSample / 8;
                Debug.WriteLine("ByteRate: "+byteRate);
                short blockAlign = (short)(ChannelCount * (BitsPerSample / 8));

                 //Build string-based wave-format structure
                string waveFormat = "";
                waveFormat += ToLittleEndianString(string.Format("{0:X4}", 1));      // indicates PCM
                waveFormat += ToLittleEndianString(string.Format("{0:X4}", ChannelCount));
                waveFormat += ToLittleEndianString(string.Format("{0:X8}", sampleRate));
                waveFormat += ToLittleEndianString(string.Format("{0:X8}", byteRate));
                waveFormat += ToLittleEndianString(string.Format("{0:X4}", blockAlign));
                waveFormat += ToLittleEndianString(string.Format("{0:X4}", BitsPerSample));
                waveFormat += ToLittleEndianString(string.Format("{0:X4}", 0));

                // Put wave format string in media streams dictionary
                var mediaStreamAttributes = new Dictionary<MediaStreamAttributeKeys, string>();
                mediaStreamAttributes[MediaStreamAttributeKeys.CodecPrivateData] = waveFormat;

                // Make description to add to available streams list
                var availableMediaStreams = new List<MediaStreamDescription>();
                mediaStreamDescription = new MediaStreamDescription(MediaStreamType.Audio, mediaStreamAttributes);
                availableMediaStreams.Add(mediaStreamDescription);

                // Set some appropriate keys in the media source dictionary
                var mediaSourceAttributes = new Dictionary<MediaSourceAttributesKeys, string>();
                mediaSourceAttributes[MediaSourceAttributesKeys.Duration] = "0";
                mediaSourceAttributes[MediaSourceAttributesKeys.CanSeek] = "false";

                // Signal that the open operation is completed


   ReportOpenMediaCompleted(mediaSourceAttributes, availableMediaStreams);
        }

我正在尝试将其设置为类似于这样设置的 iOS/Android

AudioStreamBasicDescription audioFormat;
    audioFormat.mSampleRate         = 44100.00;
    audioFormat.mFormatID           = kAudioFormatLinearPCM;
    audioFormat.mFormatFlags        = kAudioFormatFlagIsPacked | kAudioFormatFlagIsSignedInteger;
    audioFormat.mFramesPerPacket    = 1;
    audioFormat.mChannelsPerFrame   = 1;
    audioFormat.mBitsPerChannel     = 16;
    audioFormat.mBytesPerPacket     = 2;
    audioFormat.mBytesPerFrame      = 2;

我希望更新能带来一些启示。

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