internal void PageIn(ogg.Page page)
{
vorbisStreamState.pagein(page);
}
internal void PageIn(ogg.Page page)
{
theoraStreamState.pagein(page);
}
/// <summary>
/// internal method for parsing the main stream headers
/// </summary>
void ParsePrimaryHeaders()
{
ogg.Packet tempOggPacket = new ogg.Packet();
bool notDone = true;
int vorbis_streams = 0;
int theora_streams = 0;
while (notDone)
{
if (BufferData() == 0)
{
tempOggPacket.Dispose();
throw new Exception("Invalid ogg file");
}
//Check for page data
while (oggSyncState.pageout(oggPage) > 0)
{
//is this an initial header? If not, stop
if (oggPage.bos() == 0)
{
//This is done blindly, because stream only accept them selfs
if (videoDriver != null && theora_streams > 0)
{
videoDriver.PageIn(oggPage);
}
if (audioDriver != null && vorbis_streams > 0)
{
audioDriver.PageIn(oggPage);
}
notDone = false;
break;
}
ogg.StreamState oggStateTest = new ogg.StreamState(oggPage.serialno());
//oggStateTest.init( oggPage.serialno() );
oggStateTest.pagein(oggPage);
oggStateTest.packetout(tempOggPacket);
//identify the codec
if (videoDriver != null && videoDriver.DecodePrimaryHeader(tempOggPacket, oggStateTest))
{
theora_streams = 1;
}
else if (audioDriver != null && audioDriver.DecodePrimaryHeader(tempOggPacket, oggStateTest))
{
vorbis_streams = 1;
}
else
{
oggStateTest.Dispose();
}
} //end while ogg_sync_pageout
} //end while notdone
//if pri headers not found, then remove driver
if (theora_streams == 0 && videoDriver != null)
{
videoDriver.Dispose();
videoDriver = null;
}
if (vorbis_streams == 0 && audioDriver != null)
{
audioDriver.Dispose();
audioDriver = null;
}
tempOggPacket.Dispose();
}
