internal void UnpackComment(OggBitStream input)
{
int vendor_len = input.ReadInt32();
if (vendor_len < 0)
{
throw VorbisInfo.InvalidHeader();
}
var vendor = input.ReadBytes(vendor_len);
int count = input.ReadInt32();
if (count < 0)
{
throw VorbisInfo.InvalidHeader();
}
var comments = new List <byte[]> (count);
for (int i = 0; i < count; ++i)
{
int len = input.ReadInt32();
if (len < 0)
{
throw VorbisInfo.InvalidHeader();
}
var bytes = input.ReadBytes(len);
comments.Add(bytes);
}
if (input.ReadBits(1) != 1)
{
throw VorbisInfo.InvalidHeader();
}
this.Vendor = vendor;
this.Comments = comments;
}
// https://xiph.org/vorbis/doc/libvorbis/vorbis_synthesis_headerin.html
public void SynthesisHeaderin(VorbisComment vc, OggPacket op)
{
using (var input = new OggBitStream(op))
{
int packtype = input.ReadUInt8();
var buf = input.ReadBytes(6);
if (!buf.AsciiEqual("vorbis"))
{
throw new InvalidDataException("Not an Ogg/Vorbis stream.");
}
switch (packtype)
{
case 1:
if (!op.BoS)
{
throw InvalidHeader();
}
if (Rate != 0)
{
throw InvalidHeader();
}
UnpackInfo(input);
break;
case 3:
if (0 == Rate)
{
throw InvalidHeader();
}
vc.UnpackComment(input);
break;
case 5:
if (0 == Rate || null == vc.Vendor)
{
throw InvalidHeader();
}
UnpackBooks(input);
break;
default:
throw InvalidHeader();
}
}
}