Question

我有一些输出我的数据作为音频流。

我已经上传了sound snipped正弦波，并带有不良噪音效果。

我认为这个问题与数据包之间存在一个小暂停有关，并且会以某种方式产生这种低，相当规则的流行音

AudioMonitor类通过SetBuffer获取其数据，每个250ms aprrox。 ~6000个样本。

噪音源自何处？
可以采取哪些措施来解决这个问题？

编辑 *似乎是数据无法无缝进入的问题。播放一个软件包后，会暂停，waveprovider空闲并发出点击噪音。< / p>

在没有准备好样品的时候，是否可以保持沉默？*

    using System;
    using NAudio.Wave;  // Version 1.7.0.13

    namespace aws
    {
        public class AudioMonitor
        {
            private BufferedWaveProvider waveProvider;
            private WaveOut wavePlayer;

            int audioFilter = 0;
            int sampleRate = 31250;
            int resolution = 8;

            private void CreateAudio()
            {
                if (wavePlayer != null)
                {
                    StopAudio();
                    wavePlayer.Dispose();
                    wavePlayer = null;
                    waveProvider = null;
                }

                waveProvider = new BufferedWaveProvider(new WaveFormat(sampleRate, resolution, 1));
                waveProvider.BufferLength = 31250;   // standard value: 31250

                wavePlayer = new WaveOut();
                wavePlayer.DesiredLatency = 300;    // standard value: 300
                wavePlayer.NumberOfBuffers = 2;     // standard value: 2
                wavePlayer.Init(waveProvider);
            }

            public bool StartAudio()
            {
                CreateAudio();
                if (wavePlayer != null)
                {
                    wavePlayer.Play();
                    return true;
                }
                return false;
            }

            public void StopAudio()
            {
                if (wavePlayer != null)
                {
                    wavePlayer.Stop();
                }
            }

            public PlaybackState GetPlaybackState()
            {
                if (wavePlayer != null)
                {
                    return wavePlayer.PlaybackState;
                }
                return PlaybackState.Stopped;
            }

            public void SetBuffer(byte[] b)
            {
                int indexWrite = 0, indexBuffer = 0, sizeBuffer;
                byte[] nbuffer = b;
                sizeBuffer = b.Length;


                // valid data

                for (indexWrite = indexBuffer; indexWrite < (indexBuffer + sizeBuffer); ++indexWrite)
                {
                    nbuffer[indexWrite] = (Byte)((nbuffer[indexWrite]) + 128);

                    if ((nbuffer[indexWrite] < (128 + audioFilter)) && (nbuffer[indexWrite] > (128 - audioFilter)))
                        nbuffer[indexWrite] = 128;

                }

                try
                {
                    waveProvider.AddSamples(nbuffer, indexBuffer, sizeBuffer);
                }
                catch (Exception e){
                    Console.WriteLine(e.StackTrace);
                }
            }

            public void SetBuffer(double[] d, double fac)
            {
                byte[] tmpBuf = new byte[d.Length];
                for(int i = 0; i < tmpBuf.Length; i++)
                {
                    tmpBuf[i] = (byte)(d[i] / fac);
                }
                SetBuffer(tmpBuf);
            }

            public void SetAudioFilter(int f)
            {
                audioFilter = f*3; // min 0 max 60
            }

            public void Finalize()
            {
                if (wavePlayer != null)
                {
                    wavePlayer.Stop();
                    wavePlayer.Dispose();
                }
            }
        }
    }

Naudio流期间的噪声瑕疵

0 个答案: