internal static byte[] GetWaveFormat(BinaryReader br)
{
RIFFHDR rIFFHDR = default(RIFFHDR);
rIFFHDR._id = br.ReadUInt32();
rIFFHDR._len = br.ReadInt32();
rIFFHDR._type = br.ReadUInt32();
if (rIFFHDR._id != 1179011410 && rIFFHDR._type != 1163280727)
{
return(null);
}
BLOCKHDR bLOCKHDR = default(BLOCKHDR);
bLOCKHDR._id = br.ReadUInt32();
bLOCKHDR._len = br.ReadInt32();
if (bLOCKHDR._id != 544501094)
{
return(null);
}
byte[] array = br.ReadBytes(bLOCKHDR._len);
if (bLOCKHDR._len == 16)
{
byte[] array2 = new byte[18];
Array.Copy(array, array2, 16);
array = array2;
}
return(array);
}
internal void GetStreamOffsets(Stream stream)
{
BinaryReader binaryReader = new BinaryReader(stream);
RIFFHDR rIFFHDR = default(RIFFHDR);
rIFFHDR._id = binaryReader.ReadUInt32();
rIFFHDR._len = binaryReader.ReadInt32();
rIFFHDR._type = binaryReader.ReadUInt32();
if (rIFFHDR._id != 1179011410 && rIFFHDR._type != 1163280727)
{
throw new FormatException();
}
BLOCKHDR bLOCKHDR = default(BLOCKHDR);
bLOCKHDR._id = binaryReader.ReadUInt32();
bLOCKHDR._len = binaryReader.ReadInt32();
if (bLOCKHDR._id != 544501094)
{
throw new FormatException();
}
_wfx = binaryReader.ReadBytes(bLOCKHDR._len);
if (bLOCKHDR._len == 16)
{
byte[] array = new byte[18];
Array.Copy(_wfx, array, 16);
_wfx = array;
}
DATAHDR dATAHDR;
while (true)
{
dATAHDR = default(DATAHDR);
if (stream.Position + 8 < stream.Length)
{
dATAHDR._id = binaryReader.ReadUInt32();
dATAHDR._len = binaryReader.ReadInt32();
if (dATAHDR._id == 1635017060)
{
break;
}
stream.Seek(dATAHDR._len, SeekOrigin.Current);
continue;
}
return;
}
_endOfStreamPosition = stream.Position + dATAHDR._len;
}
internal static void WriteWaveHeader(Stream stream, WAVEFORMATEX waveEx, long position, int cData)
{
RIFFHDR rIFFHDR = new RIFFHDR(0);
BLOCKHDR bLOCKHDR = new BLOCKHDR(0);
DATAHDR dATAHDR = new DATAHDR(0);
int num = Marshal.SizeOf((object)rIFFHDR);
int num2 = Marshal.SizeOf((object)bLOCKHDR);
int length = waveEx.Length;
int num3 = Marshal.SizeOf((object)dATAHDR);
int num4 = num + num2 + length + num3;
using (MemoryStream memoryStream = new MemoryStream())
{
BinaryWriter binaryWriter = new BinaryWriter(memoryStream);
try
{
rIFFHDR._len = num4 + cData - 8;
binaryWriter.Write(rIFFHDR._id);
binaryWriter.Write(rIFFHDR._len);
binaryWriter.Write(rIFFHDR._type);
bLOCKHDR._len = length;
binaryWriter.Write(bLOCKHDR._id);
binaryWriter.Write(bLOCKHDR._len);
binaryWriter.Write(waveEx.ToBytes());
dATAHDR._len = cData;
binaryWriter.Write(dATAHDR._id);
binaryWriter.Write(dATAHDR._len);
stream.Seek(position, SeekOrigin.Begin);
stream.Write(memoryStream.GetBuffer(), 0, (int)memoryStream.Length);
}
finally
{
((IDisposable)binaryWriter).Dispose();
}
}
}
