To convert little-endian PCM audio samples to big-endian in C#, you can use simple bit manipulation techniques. Little-endian and big-endian refer to the byte order in which data is stored. Converting from little-endian to big-endian involves reversing the order of bytes for each sample. Here's a sample code to perform this conversion:
```csharp
public static byte[] ConvertLittleEndianToBigEndian(byte[] littleEndianData)
{
if (littleEndianData.Length % 2 != 0)
{
throw new ArgumentException("Input data length must be even for PCM audio samples.");
}
byte[] bigEndianData = new byte[littleEndianData.Length];
for (int i = 0; i < littleEndianData.Length; i += 2)
{
// Swap the bytes for each 16-bit sample
bigEndianData[i] = littleEndianData[i + 1];
bigEndianData[i + 1] = littleEndianData[i];
}
return bigEndianData;
}
```
You can use this function to convert little-endian PCM audio data to big-endian. Here's how you might use it:
```csharp
byte[] littleEndianData = ...; // Replace with your little-endian audio data
byte[] bigEndianData = ConvertLittleEndianToBigEndian(littleEndianData);
// Now bigEndianData contains the audio data in big-endian format.
```
Make sure to replace `...` with your actual little-endian PCM audio data. This code assumes that the audio data is in 16-bit PCM format, where each sample is represented by two bytes. If your data format is different, you may need to adapt the code accordingly.