public byte[] LoadWAVE(DataStream stream, out int channels, out int bits, out int rate)
{
DataReader dr = new DataReader(stream);
string signature = new string(dr.ReadChars(4));
if (signature != "RIFF")
{
throw new NotSupportedException("Not a RIFF .wav file: " + signature);
}
/*int riff_chunk_size = */dr.ReadInt32();
string format = new string(dr.ReadChars(4));
if (format != "WAVE")
{
throw new NotSupportedException("Not a WAVE .wav file: " + format);
}
string format_signature = new string(dr.ReadChars(4));
if (format_signature != "fmt ")
{
throw new NotSupportedException("Not a 'fmt ' .wav file: " + format_signature);
}
/*int format_chunk_size = */dr.ReadInt32();
/*int audio_format = */dr.ReadInt16();
int num_channels = dr.ReadInt16();
if (num_channels != 1 && num_channels != 2)
{
throw new NotSupportedException("Invalid number of channels: " + num_channels);
}
int sample_rate = dr.ReadInt32();
/*int byte_rate = */dr.ReadInt32();
/*int block_align = */dr.ReadInt16();
int bits_per_sample = dr.ReadInt16();
string data_signature = new string(dr.ReadChars(4));
if (data_signature != "data")
{
throw new NotSupportedException("Not a DATA .wav file: " + data_signature);
}
/*int data_chunk_size = */dr.ReadInt32();
channels = num_channels;
bits = bits_per_sample;
rate = sample_rate;
return dr.ReadBytes((int)dr.BaseStream.Length);
}
