public static RiffHeader Parse(BinaryReader reader)
{
var header = new RiffHeader();
header.ChunkId = reader.ReadFourCc();
header.ChunkSize = reader.ReadUInt32();
header.Format = reader.ReadFourCc();
if (header.ChunkId != "RIFF" ||
header.Format != "WAVE")
{
throw new InvalidDataException("Invalid or missing .wav file header!");
}
return(header);
}
public WaveDecoder(Stream s)
{
using (BinaryReader br = new BinaryReader(s))
{
_header = RiffHeader.Parse(br);
_format = WaveFormat.Parse(br);
if (_format.AudioFormat != WaveFormatType.Pcm)
{
_fact = WaveFact.Parse(br);
}
_data = WaveData.Parse(br);
var variant = WavParser.GetParser(_format.AudioFormat);
_decodedData = variant.Parse(br, (int)_data.SubChunkSize, _format);
_audioFormat.BitsPerSample = variant.BitsPerSample;
_audioFormat.Channels = _format.NumChannels;
_audioFormat.SampleRate = (int)_format.SampleRate;
_numSamples = _samplesLeft = _decodedData.Length / _audioFormat.BytesPerSample;
}
}
