//This function needs to be called before
//every connection
/// <summary>
/// Initializes and retrieves the ogg header packets from libogg and libvorbis.
/// Must be called after <see cref="Init(Dictionary{string, string})"/> and before <see cref="Encode(byte[], byte[], int)"/>
/// </summary>
public void WriteHeader()
{
// Comments from vorbis ecoder example
/* set up our packet->stream encoder */
/* pick a random serial number; that way we can more likely build
* chained streams just by concatenation */
ogg_stream_init(osh.AddrOfPinnedObject(), m_rand.Next());
ogg_packet header = default(ogg_packet);
ogg_packet header_comm = default(ogg_packet);
ogg_packet header_code = default(ogg_packet);
vorbis_analysis_headerout(vdh.AddrOfPinnedObject(), vch.AddrOfPinnedObject(), ref header, ref header_comm, ref header_code);
ogg_stream_packetin(osh.AddrOfPinnedObject(), ref header); /* automatically placed in its own page */
ogg_stream_packetin(osh.AddrOfPinnedObject(), ref header_comm);
ogg_stream_packetin(osh.AddrOfPinnedObject(), ref header_code);
}
public static extern int ogg_stream_packetin(IntPtr os, ref ogg_packet op);
public static extern int vorbis_analysis_headerout(IntPtr v, IntPtr vc, ref ogg_packet op, ref ogg_packet op_comm, ref ogg_packet op_code);
