public static WaveFile FromFile(string fileName)
{
var wav = new WaveFile();
FileStream filestream = null;
try
{
filestream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
using (BinaryReader file = new BinaryReader(filestream))
{
filestream = null;
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "RIFF")
{
throw new InvalidDataException();
}
//// file size
file.ReadInt32();
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "WAVE")
{
throw new InvalidDataException();
}
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "fmt ")
{
throw new InvalidDataException();
}
int fmtSize = file.ReadInt32();
if (fmtSize < 16)
{
throw new InvalidDataException();
}
if (file.ReadInt16() != 1)
{
throw new NotSupportedException();
}
wav.Channels = file.ReadInt16();
wav.SampleRate = file.ReadInt32();
int avgBytesPerSec = file.ReadInt32();
int blockAlign = file.ReadInt16();
wav.BitsPerSample = file.ReadInt16();
if (blockAlign != wav.BlockAlign)
{
throw new InvalidDataException();
}
if (avgBytesPerSec != wav.AvgBytesPerSec)
{
throw new InvalidDataException();
}
file.BaseStream.Seek(fmtSize - 16, SeekOrigin.Current);
while (Encoding.ASCII.GetString(file.ReadBytes(4)) != "data")
{
int chunkSize = file.ReadInt32();
file.BaseStream.Seek(chunkSize, SeekOrigin.Current);
}
int dataSize = file.ReadInt32();
wav.Data = file.ReadBytes(dataSize);
}
}
finally
{
if (filestream != null)
{
filestream.Dispose();
}
}
return wav;
}
public Stream RetrieveWaveStream(int start, int end)
{
var data = this.RetrieveRawData(start, end);
var wav = new WaveFile
{
Channels = this.Channels,
SampleRate = this.SampleRate,
BitsPerSample = this.BitsPerSample,
Data = data
};
var header = wav.BuildHeader();
var stream = new MemoryStream(header.Length + data.Length);
try
{
stream.Write(header, 0, header.Length);
stream.Write(data, 0, data.Length);
stream.Seek(0, SeekOrigin.Begin);
}
catch
{
stream.Dispose();
throw;
}
return stream;
}
public static WaveFile FromFile(string fileName)
{
var wav = new WaveFile();
FileStream filestream = null;
try
{
filestream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
using (BinaryReader file = new BinaryReader(filestream))
{
filestream = null;
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "RIFF")
{
throw new InvalidDataException();
}
//// file size
file.ReadInt32();
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "WAVE")
{
throw new InvalidDataException();
}
if (Encoding.ASCII.GetString(file.ReadBytes(4)) != "fmt ")
{
throw new InvalidDataException();
}
int fmtSize = file.ReadInt32();
if (fmtSize < 16)
{
throw new InvalidDataException();
}
if (file.ReadInt16() != 1)
{
throw new NotSupportedException();
}
wav.Channels = file.ReadInt16();
wav.SampleRate = file.ReadInt32();
int avgBytesPerSec = file.ReadInt32();
int blockAlign = file.ReadInt16();
wav.BitsPerSample = file.ReadInt16();
if (blockAlign != wav.BlockAlign)
{
throw new InvalidDataException();
}
if (avgBytesPerSec != wav.AvgBytesPerSec)
{
throw new InvalidDataException();
}
file.BaseStream.Seek(fmtSize - 16, SeekOrigin.Current);
while (Encoding.ASCII.GetString(file.ReadBytes(4)) != "data")
{
int chunkSize = file.ReadInt32();
file.BaseStream.Seek(chunkSize, SeekOrigin.Current);
}
int dataSize = file.ReadInt32();
wav.Data = file.ReadBytes(dataSize);
}
}
finally
{
if (filestream != null)
{
filestream.Dispose();
}
}
return(wav);
}
public void SaveAsWave(string fileName)
{
var data = this.RetrieveRawData();
var wav = new WaveFile
{
Channels = this.Channels,
SampleRate = this.SampleRate,
BitsPerSample = this.BitsPerSample,
Data = data
};
wav.Save(fileName);
}
public void SetRawDataFromWave(string fileName)
{
var wav = WaveFile.FromFile(fileName);
this.SetRawData(wav.Data, wav.BitsPerSample, wav.SampleRate, wav.Channels);
}
