/// <summary>
/// Create the binary representation of a WAV file in memory.
/// </summary>
/// <param name="dataLeft">Sound samples. Left stereo channel</param>
/// <param name="dataRight">Sound samples. Right stereo channel</param>
/// <param name="sampleRate">Sample rate, e.g. 44100 Hz</param>
/// <returns>WAV file binary content</returns>
public static byte[] createFile(Int16[] dataLeft, Int16[] dataRight, Track.SampleRateValue sampleRate)
{
using (Stream stream = new MemoryStream())
{
writeToStream(stream, dataLeft, dataRight, sampleRate);
var buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
return(buffer);
}
}
/// <summary>
/// Output the binary representation of the WAV file to a stream.
/// </summary>
/// <param name="stream">Output stream</param>
/// <param name="dataLeft">Sound samples. Left stereo channel</param>
/// <param name="dataRight">Sound samples. Right stereo channel</param>
/// <param name="sampleRate">Sample rate, e.g. 44100 Hz</param>
public static void writeToStream(Stream stream, Int16[] dataLeft, Int16[] dataRight, Track.SampleRateValue sampleRate)
{
var subChunk2Size = (UInt32)dataLeft.Length * 4;
var chunkSize = subChunk2Size + 36;
var sr = (UInt32)sampleRate;
var byteRate = sr * 4;
UInt32[] header = new UInt32[] {
0x46464952, chunkSize, 0x45564157, 0x20746d66, 16, 0x00020001, sr, byteRate,
0x00100004, 0x61746164, subChunk2Size
};
using (BinaryWriter writer = new BinaryWriter(stream)) {
foreach (var quad in header)
{
writer.Write(quad);
}
for (int i = 0; i < dataLeft.Length; i++)
{
writer.Write(dataLeft[i]);
writer.Write(dataRight[i]);
}
}
}
/// <summary>
/// Save the sample data as a WAV file to the filesystem.
/// </summary>
/// <param name="path">Destination file path</param>
/// <param name="dataLeft">Sound samples. Left stereo channel</param>
/// <param name="dataRight">Sound samples. Right stereo channel</param>
/// <param name="sampleRate">Sample rate, e.g. 44100 Hz</param>
public static void saveFile(string path, Int16[] dataLeft, Int16[] dataRight, Track.SampleRateValue sampleRate)
{
using (FileStream fileStream = new FileStream(path, FileMode.Create)) {
writeToStream(fileStream, dataLeft, dataRight, sampleRate);
}
}
