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/********************************************************************
* *
* THIS FILE IS PART OF THE Theorarm SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora/Tremor SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
* Modifications/Additions Copyright (C) 2009 Robin Watts for *
* Pinknoise Productions Ltd. *
* *
********************************************************************
function: subsumed libogg includes
********************************************************************/
#ifndef _OGG_H
#define _OGG_H
#ifdef __cplusplus
extern "C" {
#endif
#include "os_types.h"
#ifndef ONLY_C
#define ARM_LITTLE_ENDIAN
#endif
typedef struct ogg_buffer_state{
struct ogg_buffer *unused_buffers;
struct ogg_reference *unused_references;
int outstanding;
int shutdown;
} ogg_buffer_state;
typedef struct ogg_buffer {
unsigned char *data;
long size;
int refcount;
union {
ogg_buffer_state *owner;
struct ogg_buffer *next;
} ptr;
} ogg_buffer;
typedef struct ogg_reference {
ogg_buffer *buffer;
long begin;
long length;
struct ogg_reference *next;
} ogg_reference;
typedef struct oggpack_buffer {
#ifdef ARM_LITTLE_ENDIAN
int bitsLeftInSegment;
ogg_uint32_t *ptr;
long bitsLeftInWord;
#else
int headbit;
unsigned char *headptr;
long headend;
#endif /* ARM_LITTLE_ENDIAN */
/* memory management */
ogg_reference *head;
ogg_reference *tail;
/* render the byte/bit counter API constant time */
long count; /* doesn't count the tail */
} oggpack_buffer;
typedef struct oggbyte_buffer {
ogg_reference *baseref;
ogg_reference *ref;
unsigned char *ptr;
long pos;
long end;
} oggbyte_buffer;
typedef struct ogg_sync_state {
/* decode memory management pool */
ogg_buffer_state *bufferpool;
/* stream buffers */
ogg_reference *fifo_head;
ogg_reference *fifo_tail;
long fifo_fill;
/* stream sync management */
int unsynced;
int headerbytes;
int bodybytes;
} ogg_sync_state;
typedef struct ogg_stream_state {
ogg_reference *header_head;
ogg_reference *header_tail;
ogg_reference *body_head;
ogg_reference *body_tail;
int e_o_s; /* set when we have buffered the last
packet in the logical bitstream */
int b_o_s; /* set after we've written the initial page
of a logical bitstream */
long serialno;
long pageno;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
ogg_int64_t granulepos;
int lacing_fill;
ogg_uint32_t body_fill;
/* decode-side state data */
int holeflag;
int spanflag;
int clearflag;
int laceptr;
ogg_uint32_t body_fill_next;
} ogg_stream_state;
typedef struct {
ogg_reference *packet;
long bytes;
long b_o_s;
long e_o_s;
ogg_int64_t granulepos;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
} ogg_packet;
typedef struct {
ogg_reference *header;
int header_len;
ogg_reference *body;
long body_len;
} ogg_page;
/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
extern void oggpack_readinit(oggpack_buffer *b,ogg_reference *r);
extern long oggpack_look(oggpack_buffer *b,int bits);
extern void oggpack_adv(oggpack_buffer *b,int bits);
extern long oggpack_read(oggpack_buffer *b,int bits);
extern long oggpack_bytes(oggpack_buffer *b);
extern long oggpack_bits(oggpack_buffer *b);
extern int oggpack_eop(oggpack_buffer *b);
// Quick hack
#define oggpack_bytesleft(B) (((B)->bitsLeftInSegment+7)/8)
/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
extern void ogg_sync_init(ogg_sync_state *oy);
extern ogg_sync_state *ogg_sync_create(void);
extern int ogg_sync_clear(ogg_sync_state *oy);
extern int ogg_sync_destroy(ogg_sync_state *oy);
extern int ogg_sync_reset(ogg_sync_state *oy);
extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size);
extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
/* Ogg BITSTREAM PRIMITIVES: general ***************************/
extern void ogg_stream_init(ogg_stream_state *os, int serialno);
extern ogg_stream_state *ogg_stream_create(int serialno);
extern int ogg_stream_destroy(ogg_stream_state *os);
extern int ogg_stream_clear(ogg_stream_state *os);
extern int ogg_stream_reset(ogg_stream_state *os);
extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
extern int ogg_stream_eos(ogg_stream_state *os);
extern int ogg_page_checksum_set(ogg_page *og);
extern int ogg_page_version(ogg_page *og);
extern int ogg_page_continued(ogg_page *og);
extern int ogg_page_bos(ogg_page *og);
extern int ogg_page_eos(ogg_page *og);
extern ogg_int64_t ogg_page_granulepos(ogg_page *og);
extern ogg_uint32_t ogg_page_serialno(ogg_page *og);
extern ogg_uint32_t ogg_page_pageno(ogg_page *og);
extern int ogg_page_packets(ogg_page *og);
extern int ogg_page_getbuffer(ogg_page *og, unsigned char **buffer);
extern int ogg_packet_release(ogg_packet *op);
extern int ogg_page_release(ogg_page *og);
extern void ogg_page_dup(ogg_page *d, ogg_page *s);
/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/
#define OGG_SUCCESS 0
#define OGG_HOLE -10
#define OGG_SPAN -11
#define OGG_EVERSION -12
#define OGG_ESERIAL -13
#define OGG_EINVAL -14
#define OGG_EEOS -15
#ifdef __cplusplus
}
#endif
#endif /* _OGG_H */
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