--ogg/ogg.h from libogg 1.3.2
local ffi = require'ffi'

ffi.cdef[[
typedef int64_t ogg_int64_t;
typedef struct {
  void *iov_base;
  size_t iov_len;
} ogg_iovec_t;
typedef struct {
  long endbyte;
  int endbit;
  unsigned char *buffer;
  unsigned char *ptr;
  long storage;
} oggpack_buffer;
typedef struct {
  unsigned char *header;
  long header_len;
  unsigned char *body;
  long body_len;
} ogg_page;
typedef struct {
  unsigned char *body_data;
  long body_storage;
  long body_fill;
  long body_returned;
  int *lacing_vals;
  ogg_int64_t *granule_vals;
  long lacing_storage;
  long lacing_fill;
  long lacing_packet;
  long lacing_returned;
  unsigned char header[282];
  int header_fill;
  int e_o_s;
  int b_o_s;
  long serialno;
  long pageno;
  ogg_int64_t packetno;
  ogg_int64_t granulepos;
} ogg_stream_state;
typedef struct {
  unsigned char *packet;
  long bytes;
  long b_o_s;
  long e_o_s;
  ogg_int64_t granulepos;
  ogg_int64_t packetno;
} ogg_packet;
typedef struct {
  unsigned char *data;
  int storage;
  int fill;
  int returned;
  int unsynced;
  int headerbytes;
  int bodybytes;
} ogg_sync_state;
void oggpack_writeinit(oggpack_buffer *b);
int oggpack_writecheck(oggpack_buffer *b);
void oggpack_writetrunc(oggpack_buffer *b,long bits);
void oggpack_writealign(oggpack_buffer *b);
void oggpack_writecopy(oggpack_buffer *b,void *source,long bits);
void oggpack_reset(oggpack_buffer *b);
void oggpack_writeclear(oggpack_buffer *b);
void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
void oggpack_write(oggpack_buffer *b,unsigned long value,int bits);
long oggpack_look(oggpack_buffer *b,int bits);
long oggpack_look1(oggpack_buffer *b);
void oggpack_adv(oggpack_buffer *b,int bits);
void oggpack_adv1(oggpack_buffer *b);
long oggpack_read(oggpack_buffer *b,int bits);
long oggpack_read1(oggpack_buffer *b);
long oggpack_bytes(oggpack_buffer *b);
long oggpack_bits(oggpack_buffer *b);
unsigned char *oggpack_get_buffer(oggpack_buffer *b);
void oggpackB_writeinit(oggpack_buffer *b);
int oggpackB_writecheck(oggpack_buffer *b);
void oggpackB_writetrunc(oggpack_buffer *b,long bits);
void oggpackB_writealign(oggpack_buffer *b);
void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits);
void oggpackB_reset(oggpack_buffer *b);
void oggpackB_writeclear(oggpack_buffer *b);
void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits);
long oggpackB_look(oggpack_buffer *b,int bits);
long oggpackB_look1(oggpack_buffer *b);
void oggpackB_adv(oggpack_buffer *b,int bits);
void oggpackB_adv1(oggpack_buffer *b);
long oggpackB_read(oggpack_buffer *b,int bits);
long oggpackB_read1(oggpack_buffer *b);
long oggpackB_bytes(oggpack_buffer *b);
long oggpackB_bits(oggpack_buffer *b);
unsigned char *oggpackB_get_buffer(oggpack_buffer *b);
int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op);
int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov,
                                   int count, long e_o_s, ogg_int64_t granulepos);
int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og);
int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill);
int ogg_stream_flush(ogg_stream_state *os, ogg_page *og);
int ogg_stream_flush_fill(ogg_stream_state *os, ogg_page *og, int nfill);
int ogg_sync_init(ogg_sync_state *oy);
int ogg_sync_clear(ogg_sync_state *oy);
int ogg_sync_reset(ogg_sync_state *oy);
int ogg_sync_destroy(ogg_sync_state *oy);
int ogg_sync_check(ogg_sync_state *oy);
char *ogg_sync_buffer(ogg_sync_state *oy, long size);
int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
int ogg_stream_init(ogg_stream_state *os,int serialno);
int ogg_stream_clear(ogg_stream_state *os);
int ogg_stream_reset(ogg_stream_state *os);
int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
int ogg_stream_destroy(ogg_stream_state *os);
int ogg_stream_check(ogg_stream_state *os);
int ogg_stream_eos(ogg_stream_state *os);
void ogg_page_checksum_set(ogg_page *og);
int ogg_page_version(const ogg_page *og);
int ogg_page_continued(const ogg_page *og);
int ogg_page_bos(const ogg_page *og);
int ogg_page_eos(const ogg_page *og);
ogg_int64_t ogg_page_granulepos(const ogg_page *og);
int ogg_page_serialno(const ogg_page *og);
long ogg_page_pageno(const ogg_page *og);
int ogg_page_packets(const ogg_page *og);
void ogg_packet_clear(ogg_packet *op);
]]