// uses the local ogg_stream storage in vf; this is important for
// non-streaming input sources
int fetch_headers(Info vi, Comment vc, int[] serialno, Page og_ptr)
{
//System.err.println("fetch_headers");
Page og=new Page();
Packet op=new Packet();
int ret;
if(og_ptr==null) {
ret=get_next_page(og, CHUNKSIZE);
if(ret==OV_EREAD) { return OV_EREAD; }
if(ret<0) { return OV_ENOTVORBIS; }
og_ptr=og;
}
if(serialno!=null) { serialno[0]=og_ptr.serialno(); }
os.init(og_ptr.serialno());
// extract the initial header from the first page and verify that the
// Ogg bitstream is in fact Vorbis data
vi.init();
vc.init();
int i=0;
while(i<3) {
os.pagein(og_ptr);
while(i<3) {
int result=os.packetout(op);
if(result==0) { break; }
if(result==-1) {
Console.Error.WriteLine("Corrupt header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
os.clear();
return -1;
}
if(vi.synthesis_headerin(vc, op)!=0) {
Console.Error.WriteLine("Illegal header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
os.clear();
return -1;
}
i++;
}
if(i<3)
if(get_next_page(og_ptr, 1)<0) {
Console.Error.WriteLine("Missing header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
os.clear();
return -1;
}
}
return 0;
}
// uses the local ogg_stream storage in vf; this is important for
// non-streaming input sources
private int fetch_headers(Info vi, Comment vc, int[] serialno, Page og_ptr)
{
//System.err.println("fetch_headers");
Page og = new Page();
Packet op = new Packet();
int ret;
if (og_ptr == null)
{
ret = get_next_page(og, CHUNKSIZE);
if (ret == OV_EREAD)
{
return(OV_EREAD);
}
if (ret < 0)
{
return(OV_ENOTVORBIS);
}
og_ptr = og;
}
if (serialno != null)
{
serialno[0] = og_ptr.serialno();
}
os.init(og_ptr.serialno());
// extract the initial header from the first page and verify that the
// Ogg bitstream is in fact Vorbis data
vi.init();
vc.init();
int i = 0;
while (i < 3)
{
os.pagein(og_ptr);
while (i < 3)
{
int result = os.packetout(op);
if (result == 0)
{
break;
}
if (result == -1)
{
throw new Exception("Corrupt header in logical bitstream.");
}
if (vi.synthesis_headerin(vc, op) != 0)
{
throw new Exception("Illegal header in logical bitstream.");
}
i++;
}
if (i < 3)
{
if (get_next_page(og_ptr, 1) < 0)
{
throw new Exception("Missing header in logical bitstream.");
}
}
}
return(0);
}
