/// <summary>
/// Decodes a dca file to PCM data
/// </summary>
/// <returns>byte array with PCM data</returns>
public ReadData Decode(int offset)
{
int channels = 2;
int ms = 20;
int blockSize = 48 * 2 * channels * ms;
using(FileStream fs = new FileStream(__filename, FileMode.Open))
using (BinaryReader br = new BinaryReader(fs))
{
ushort bytesToRead = 0;
br.BaseStream.Position = offset;
while ((bytesToRead = br.ReadUInt16()) > 0)
{
byte[] buffer = new byte[bytesToRead];
buffer = br.ReadBytes(bytesToRead);
byte[] pcmBuffer = new byte[blockSize];
int bytesDecoded = decoder.DecodeFrame(buffer, 0, bytesToRead, pcmBuffer);
ReadData r = new ReadData();
r.offset = bytesToRead + offset;
r.data = pcmBuffer;
return r;
}
}
return new ReadData();
}
static void Decode()
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Title = "Select DCA file to decode.";
ofd.Filter = "DCA Files (*.dca)|*.dca";
if (ofd.ShowDialog() == DialogResult.OK)
{
Stopwatch t = new Stopwatch();
DcaDecoder decoder = new DcaDecoder(ofd.FileName);
t.Start();
ReadData pcmData = new ReadData();
pcmData.offset = 0;
pcmData.data = new byte[1];
List<byte[]> bytes = new List<byte[]>();
while ((pcmData = decoder.Decode(pcmData.offset)).data != null)
{
bytes.Add(pcmData.data);
}
byte[] FINAL;
using (BinaryWriter bw = new BinaryWriter(new MemoryStream()))
{
bytes.ForEach(x => bw.Write(x));
MemoryStream baseStream = bw.BaseStream as MemoryStream;
FINAL = baseStream.ToArray();
}
t.Stop();
SaveFileDialog sfd = new SaveFileDialog();
sfd.Filter = "Wave Files (*.wav)|*.wav";
if(sfd.ShowDialog() == DialogResult.OK)
{
File.WriteAllBytes(sfd.FileName, FINAL);
}
Console.WriteLine("\ndone in " + t.Elapsed.Seconds + "s" + " (" + t.ElapsedTicks + " ticks)");
decoder.Dispose();
}
}
