public void Write(OggPacket packet, bool forceFlush = false)
{
var liboggPacket = new libogg.ogg_packet
{
packet = Marshal.AllocHGlobal(packet.Data.Length),
bytes = packet.Data.Length,
b_o_s = packet.IsBeginOfStream ? 1 : 0,
e_o_s = packet.IsEndOfStream ? 1 : 0,
granulepos = packet.GranulePosition,
packetno = packet.PacketNumber
};
Marshal.Copy(packet.Data, 0, liboggPacket.packet, packet.Data.Length);
var result = libogg.ogg_stream_packetin(ref this.streamState, ref liboggPacket);
Marshal.FreeHGlobal(liboggPacket.packet);
if (result != 0)
{
throw new Exception("Internal error occurred when trying to submit a packet to the libogg stream.");
}
this.Flush(forceFlush);
}
public OggPacket(libogg.ogg_packet liboggPacket)
{
this.Data = new byte[liboggPacket.bytes];
Marshal.Copy(liboggPacket.packet, this.Data, 0, liboggPacket.bytes);
this.IsBeginOfStream = liboggPacket.b_o_s != 0;
this.IsEndOfStream = liboggPacket.e_o_s != 0;
this.GranulePosition = liboggPacket.granulepos;
this.PacketNumber = liboggPacket.packetno;
}
/// <summary>
/// Reads a packet from the stream.
/// Internally this reads a page whenever no full packet can be read.
/// Note that the granule position of the returned packet is -1 when it is not the last packet that ended on a page.
/// </summary>
/// <returns></returns>
public OggPacket ReadPacket()
{
var liboggPacket = new libogg.ogg_packet();
int packetOutResult;
// Retry without new page if it is out of sync and has a gap (-1)
do
{
packetOutResult = libogg.ogg_stream_packetout(ref this.streamState, ref liboggPacket);
// Read a new page into the stream when there is insufficient data available
if (packetOutResult == 0)
{
this.BufferPage();
}
}while (packetOutResult != 1);
return(new OggPacket(liboggPacket));
}