private WavFileHeader ReadHeader()
{
var header = new WavFileHeader();
ExpectString("RIFF");
header.ChunkSize = ReadInt();
ExpectString("WAVE");
ExpectString("fmt ");
header.Subchunk1Size = ReadInt();
header.AudioFormat = ReadShort();
header.NumChannels = ReadShort();
header.SampleRate = ReadInt();
header.ByteRate = ReadInt();
header.BlockAlign = ReadShort();
header.BitsPerSample = ReadShort();
if (header.Subchunk1Size > 16)
{
var extras = _reader.ReadBytes(header.Subchunk1Size - 16);
Console.WriteLine($"Subchunk 1 had {extras.Length} extra bytes: [{string.Join(", ", extras)}]");
}
ExpectString("data");
header.Subchunk2Size = ReadInt();
foreach (var prop in typeof(WavFileHeader).GetProperties())
{
var val = prop.GetValue(header);
var name = prop.Name;
Console.WriteLine($" - {name.PadRight(20)} = {val}");
}
return(header);
}
public void WriteHeader(WavFileHeader header)
{
WriteString("RIFF");
WriteInt(36); // No samples written yet
WriteString("WAVE");
WriteString("fmt ");
WriteInt(header.Subchunk1Size);
WriteShort(header.AudioFormat);
WriteShort(header.NumChannels);
WriteInt(header.SampleRate);
WriteInt(header.ByteRate);
WriteShort(header.BlockAlign);
WriteShort(header.BitsPerSample);
WriteString("data");
WriteInt(0); // No samples written yet
}
public WavFileReader(string filename)
{
_reader = new BinaryFileReader(filename);
_header = ReadHeader();
}