private bool LoadComments(DataPacket packet)
{
if (!packet.ReadBytes(7).SequenceEqual(new byte[] { 0x03, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73 }))
{
return(false);
}
if (!_pagesSeen.Contains((_lastPageSeen = packet.PageSequenceNumber)))
{
_pagesSeen.Add(_lastPageSeen);
}
_glueBits += 56;
_vendor = Encoding.UTF8.GetString(packet.ReadBytes(packet.ReadInt32()));
_comments = new string[packet.ReadInt32()];
for (var i = 0; i < _comments.Length; i++)
{
_comments[i] = Encoding.UTF8.GetString(packet.ReadBytes(packet.ReadInt32()));
}
_metaBits += packet.BitsRead - 56;
_wasteHdrBits += 8 * packet.Length - packet.BitsRead;
return(true);
}
private bool ProcessStreamHeader(DataPacket packet)
{
if (!packet.ReadBytes(7).SequenceEqual(new byte[] { 0x01, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73 }))
{
// don't mark the packet as done... it might be used elsewhere
_glueBits += packet.Length * 8;
return(false);
}
if (!_pagesSeen.Contains((_lastPageSeen = packet.PageSequenceNumber)))
{
_pagesSeen.Add(_lastPageSeen);
}
_glueBits += 56;
var startPos = packet.BitsRead;
if (packet.ReadInt32() != 0)
{
throw new InvalidDataException("Only Vorbis stream version 0 is supported.");
}
_channels = packet.ReadByte();
_sampleRate = packet.ReadInt32();
_upperBitrate = packet.ReadInt32();
_nominalBitrate = packet.ReadInt32();
_lowerBitrate = packet.ReadInt32();
Block0Size = 1 << (int)packet.ReadBits(4);
Block1Size = 1 << (int)packet.ReadBits(4);
if (_nominalBitrate == 0)
{
if (_upperBitrate > 0 && _lowerBitrate > 0)
{
_nominalBitrate = (_upperBitrate + _lowerBitrate) / 2;
}
}
_metaBits += packet.BitsRead - startPos + 8;
_wasteHdrBits += 8 * packet.Length - packet.BitsRead;
return(true);
}