public static void oggpack_readinit(oggpack_buffer b, ArrayPointer buf, long bytes)
{
//memset(buf, 0, sizeof(*b));
b.buffer = b.ptr = buf;
b.storage = bytes;
}
/* The Vorbis header is in three packets; the initial small packet in
* the first page that identifies basic parameters, a second packet
* with bitstream comments and a third packet that holds the
* codebook. */
public static int vorbis_synthesis_headerin(vorbis_info vi, vorbis_comment vc, ogg_packet op)
{
oggpack_buffer opb = new oggpack_buffer();
if (op != null)
{
oggpack_readinit(opb, op.packet, op.bytes);
/* Which of the three types of header is this? */
/* Also verify header-ness, vorbis */
{
var buffer = new ArrayPointer();
long packtype = oggpack_read(opb, 8);
//memset(buffer, 0, 6);
_v_readstring(opb, buffer, 6);
if (memcmp(buffer, "vorbis", 6) != 0)
{
/* not a vorbis header */
return(OV_ENOTVORBIS);
}
switch (packtype)
{
case 0x01: /* least significant *bit* is read first */
if (op.b_o_s == 0)
{
/* Not the initial packet */
return(OV_EBADHEADER);
}
if (vi.rate != 0)
{
/* previously initialized info header */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_info(vi, opb));
case 0x03: /* least significant *bit* is read first */
if (vi.rate == 0)
{
/* um... we didn't get the initial header */
return(OV_EBADHEADER);
}
if (vc.vendor != null)
{
/* previously initialized comment header */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_comment(vc, opb));
case 0x05: /* least significant *bit* is read first */
if (vi.rate == 0 || vc.vendor == null)
{
/* um... we didn;t get the initial header or comments yet */
return(OV_EBADHEADER);
}
if (vi.codec_setup == null)
{
/* improperly initialized vorbis_info */
return(OV_EFAULT);
}
if (((codec_setup_info)vi.codec_setup).books > 0)
{
/* previously initialized setup header */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_books(vi, opb));
default:
/* Not a valid vorbis header type */
return(OV_EBADHEADER);
//break;
}
}
}
return(OV_EBADHEADER);
}
