C# NAudio将采样缓冲区转换为波形缓冲区
我的目标是让NAudio实时处理和回放音频数据。该应用程序使用不同的格式:8位pcm、16位pcm、24位pcm。对于播放,我使用WaveOut和BufferedWaveProvider。实时处理单个样本会带来困难。要将原始数据转换为样本,我使用以下代码:C# NAudio将采样缓冲区转换为波形缓冲区,c#,.net,audio,naudio,sample,C#,.net,Audio,Naudio,Sample,我的目标是让NAudio实时处理和回放音频数据。该应用程序使用不同的格式:8位pcm、16位pcm、24位pcm。对于播放,我使用WaveOut和BufferedWaveProvider。实时处理单个样本会带来困难。要将原始数据转换为样本,我使用以下代码: var vaweProviderIn = new BufferedWaveProvider(format); vaweProviderIn.AddSamples(waveBuffer, 0, waveBuffer.Length); var s
var vaweProviderIn = new BufferedWaveProvider(format);
vaweProviderIn.AddSamples(waveBuffer, 0, waveBuffer.Length);
var sampleProvider = vaweProviderIn.ToSampleProvider();
sampleProvider.Read(sampleBuffer, 0, sampleBufferSize);
//samples processing
问题是如何将samples缓冲区转换回wave缓冲区来播放它?我编写了自己的代码来解决这个问题
private enum BPS {PCM_16Bit = 16, PCM_24Bit = 24};
/// <summary>
/// Converting the Sample Buffer to the Byte Buffer
/// </summary>
/// <param name="samples"></param>
/// <param name="format"></param>
/// <returns></returns>
private byte[] samplesToVawe(float[] samples, WaveFormat format)
{
Int32 intSample;
UInt32 sample4Byte;
byte[] byteBuffer = new byte[samples.Length * (format.BitsPerSample / 8)];
uint byteBufIndex = 0;
for (uint i = 0; i < samples.Length; i++)
{
//convert 1 sample into 4 byte integer
intSample = (Int32)(samples[i] * Int32.MaxValue);
sample4Byte = (UInt32)intSample;
switch((BPS)format.BitsPerSample)
{
case BPS.PCM_24Bit:
byteBuffer[byteBufIndex++] = (byte)(sample4Byte >> 8);
byteBuffer[byteBufIndex++] = (byte)(sample4Byte >> 16);
byteBuffer[byteBufIndex++] = (byte)(sample4Byte >> 24);
break;
case BPS.PCM_16Bit:
byteBuffer[byteBufIndex++] = (byte)(sample4Byte >> 16);
byteBuffer[byteBufIndex++] = (byte)(sample4Byte >> 24);
break;
}
}
return byteBuffer;
}
私有枚举BPS{PCM_16Bit=16,PCM_24Bit=24};
///
///将示例缓冲区转换为字节缓冲区
///
///
///
///
专用字节[]采样数Tovawe(浮点[]采样数,波形格式)
{
Int32-intSample;
UInt32采样4字节;
byte[]byteBuffer=新字节[samples.Length*(format.BitsPerSample/8)];
uint-bytebuffindex=0;
对于(uint i=0;i>8);
byteBuffer[byteBufIndex++]=(字节)(样本4字节>>16);
byteBuffer[byteBufIndex++]=(字节)(样本4字节>>24);
打破
案例BPS.PCM_16位:
byteBuffer[byteBufIndex++]=(字节)(样本4字节>>16);
byteBuffer[byteBufIndex++]=(字节)(样本4字节>>24);
打破
}
}
返回缓冲区;
}