static readonly byte[] VorbisIdentifier = { 0x01, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73 }; //[0x01]VORBIS
#endregion Fields
#region Constructors
public IdentificationPacket(Packet packet)
{
VorbisVersion = packet.ReadUInt32();
if (VorbisVersion != 0)
throw new VorbisException("stream is undecodable", new VorbisException("VorbisVersion has to be zero"));
Channels = packet.ReadByte();
if (Channels < 1)
throw new VorbisException("stream is undecodable", new VorbisException("Channels must be greater than zero"));
SampleRate = packet.ReadUInt32();
if (SampleRate < 1)
throw new VorbisException("stream is undecodable", new VorbisException("Samplerate must be greater than zero"));
MaxBitrate = packet.ReadUInt32();
MinBitrate = packet.ReadUInt32();
BlockSize0 = (byte)packet.ReadBits(4);
BlockSize1 = (byte)packet.ReadBits(4);
FramingFlag = packet.ReadBit();
if ((Math.Log(BlockSize0, 2) % 1) != 0 || (Math.Log(BlockSize1, 2) % 1) != 0)
throw new VorbisException("stream is undecodable", new VorbisException("BlockSize has to be a value of 2^n. B0: {0}; B1: {1}.", BlockSize0, BlockSize1));
if (BlockSize0 > BlockSize1)
throw new VorbisException("stream is undecodable", new VorbisException("BlockSize0 is bigger than BlockSize1. B0: {0}; B1: {1}.", BlockSize0, BlockSize1));
if (FramingFlag == false)
throw new VorbisException("stream is undecodable", new VorbisException("FramingFlag has to be nonzero."));
}