public void Pack(string file, WaveCompression compression, WaveEncryption encryption)
{
using (var stream = new FileStream(file, FileMode.Create))
{
Pack(stream, compression, encryption);
}
}
private Stream CreateCompressionStream(Stream stream, WaveCompression type, CompressionMode mode)
{
switch (type)
{
case WaveCompression.Uncompressed:
return(stream);
case WaveCompression.GZip:
return(new GZipStream(stream, mode, true));
case WaveCompression.DEFLATE:
return(new DeflateStream(stream, mode, true));
case WaveCompression.LZMA:
return(mode == CompressionMode.Compress ? LzmaStream.Encode(stream) : LzmaStream.Decode(stream));
case WaveCompression.Bzip2:
return(mode == CompressionMode.Compress ? Bzip2Stream.Output(new SkipStream(stream, 2), false, 9) : Bzip2Stream.Input(stream, true));
case WaveCompression.Flac:
return(new FlacStream(stream, true, BitsPerSample));
default:
throw new CustomException("This compression method is not supported.");
}
}
public void Pack(Stream output, WaveCompression compression, WaveEncryption encryption)
{
Pack(new BinaryWriter(output), compression, encryption);
}
public void Pack(BinaryWriter writer, WaveCompression compression, WaveEncryption encryption)
{
byte[] cdata;
using (var buffer = new MemoryStream())
{
var enc = CreateEncryptionStream(buffer, encryption, CryptoStreamMode.Write);
if (compression == WaveCompression.LZMA) //needs buffer
{
using (var compbuffer = new MemoryStream())
{
using (var comp = CreateCompressionStream(compbuffer, compression, CompressionMode.Compress))
{
comp.Write(RawData, 0, RawData.Length);
}
compbuffer.Position = 0;
compbuffer.CopyTo(enc);
}
}
else
{
using (var comp = CreateCompressionStream(enc, compression, CompressionMode.Compress))
{
comp.Write(RawData, 0, RawData.Length);
}
}
enc.Close();
cdata = buffer.ToArray();
}
short cbSize = 2 + 4 + 16 + 4;
int fmtSize = 16 + 2 + cbSize;
int riffSize = 4 + 8 + fmtSize + 8 + 4 + AdditionalChunks.Sum(c => 8 + c.Value.Length) + 8 + cdata.Length;
writer.Write("RIFF".ToCharArray());
writer.Write(riffSize);
writer.Write("WAVE".ToCharArray());
writer.Write("fmt ".ToCharArray());
writer.Write(fmtSize);
writer.Write((ushort)0xFFFE);
writer.Write(NumChannels);
writer.Write(SampleRate);
writer.Write((int)Math.Round(cdata.Length / ((float)NumSamples / SampleRate)));
writer.Write(BlockAlign);
writer.Write(BitsPerSample);
writer.Write(cbSize);
writer.Write((short)0);
writer.Write(0);
//writer.Write(FormatGuids[compressionMethod].ToByteArray());
writer.Write(Version1Guid.ToByteArray());
writer.Write((byte)compression);
writer.Write((byte)encryption);
writer.Write(Format);
writer.Write("fact".ToCharArray());
writer.Write(4);
writer.Write(NumSamples);
foreach (var chunk in AdditionalChunks)
{
writer.Write(chunk.Key.ToCharArray());
writer.Write(chunk.Value.Length);
writer.Write(chunk.Value);
}
writer.Write("data".ToCharArray());
writer.Write(cdata.Length);
writer.Write(cdata);
}