misc/libtremor/ogg.h
author sheepluva
Fri, 21 Oct 2011 18:23:43 +0200
changeset 6169 582f9f61b972
parent 5170 f7e49eff3708
permissions -rw-r--r--
fix overlapping issue in main menu
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/********************************************************************
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 *                                                                  *
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 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
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 *                                                                  *
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 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
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 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
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 *                                                                  *
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 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *
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 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
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 *                                                                  *
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 ********************************************************************
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 function: subsumed libogg includes
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 ********************************************************************/
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#ifndef _OGG_H
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#define _OGG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "os_types.h"
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typedef struct ogg_buffer_state{
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  struct ogg_buffer    *unused_buffers;
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  struct ogg_reference *unused_references;
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  int                   outstanding;
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  int                   shutdown;
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} ogg_buffer_state;
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typedef struct ogg_buffer {
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  unsigned char      *data;
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  long                size;
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  int                 refcount;
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  union {
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    ogg_buffer_state  *owner;
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    struct ogg_buffer *next;
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  } ptr;
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} ogg_buffer;
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typedef struct ogg_reference {
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  ogg_buffer    *buffer;
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  long           begin;
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  long           length;
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  struct ogg_reference *next;
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} ogg_reference;
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typedef struct oggpack_buffer {
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  int            headbit;
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  unsigned char *headptr;
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  long           headend;
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  /* memory management */
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  ogg_reference *head;
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  ogg_reference *tail;
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  /* render the byte/bit counter API constant time */
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  long              count; /* doesn't count the tail */
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} oggpack_buffer;
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typedef struct oggbyte_buffer {
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  ogg_reference *baseref;
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  ogg_reference *ref;
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  unsigned char *ptr;
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  long           pos;
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  long           end;
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} oggbyte_buffer;
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typedef struct ogg_sync_state {
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  /* decode memory management pool */
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  ogg_buffer_state *bufferpool;
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  /* stream buffers */
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  ogg_reference    *fifo_head;
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  ogg_reference    *fifo_tail;
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  long              fifo_fill;
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  /* stream sync management */
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  int               unsynced;
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  int               headerbytes;
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  int               bodybytes;
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} ogg_sync_state;
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typedef struct ogg_stream_state {
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  ogg_reference *header_head;
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  ogg_reference *header_tail;
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  ogg_reference *body_head;
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  ogg_reference *body_tail;
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  int            e_o_s;    /* set when we have buffered the last
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                              packet in the logical bitstream */
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  int            b_o_s;    /* set after we've written the initial page
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                              of a logical bitstream */
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  long           serialno;
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  long           pageno;
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  ogg_int64_t    packetno; /* sequence number for decode; the framing
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                              knows where there's a hole in the data,
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                              but we need coupling so that the codec
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                              (which is in a seperate abstraction
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                              layer) also knows about the gap */
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  ogg_int64_t    granulepos;
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  int            lacing_fill;
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  ogg_uint32_t   body_fill;
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  /* decode-side state data */
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  int            holeflag;
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  int            spanflag;
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  int            clearflag;
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  int            laceptr;
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  ogg_uint32_t   body_fill_next;
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} ogg_stream_state;
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typedef struct {
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  ogg_reference *packet;
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  long           bytes;
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  long           b_o_s;
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  long           e_o_s;
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  ogg_int64_t    granulepos;
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  ogg_int64_t    packetno;     /* sequence number for decode; the framing
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                                  knows where there's a hole in the data,
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                                  but we need coupling so that the codec
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                                  (which is in a seperate abstraction
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                                  layer) also knows about the gap */
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} ogg_packet;
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typedef struct {
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  ogg_reference *header;
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  int            header_len;
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  ogg_reference *body;
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  long           body_len;
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} ogg_page;
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/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
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extern void  oggpack_readinit(oggpack_buffer *b,ogg_reference *r);
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extern long  oggpack_look(oggpack_buffer *b,int bits);
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extern void  oggpack_adv(oggpack_buffer *b,int bits);
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extern long  oggpack_read(oggpack_buffer *b,int bits);
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extern long  oggpack_bytes(oggpack_buffer *b);
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extern long  oggpack_bits(oggpack_buffer *b);
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extern int   oggpack_eop(oggpack_buffer *b);
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/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
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extern ogg_sync_state *ogg_sync_create(void);
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extern int      ogg_sync_destroy(ogg_sync_state *oy);
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extern int      ogg_sync_reset(ogg_sync_state *oy);
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extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size);
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extern int      ogg_sync_wrote(ogg_sync_state *oy, long bytes);
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extern long     ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
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extern int      ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
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extern int      ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
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extern int      ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
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extern int      ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
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/* Ogg BITSTREAM PRIMITIVES: general ***************************/
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extern ogg_stream_state *ogg_stream_create(int serialno);
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extern int      ogg_stream_destroy(ogg_stream_state *os);
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extern int      ogg_stream_reset(ogg_stream_state *os);
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extern int      ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
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extern int      ogg_stream_eos(ogg_stream_state *os);
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extern int      ogg_page_checksum_set(ogg_page *og);
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extern int      ogg_page_version(ogg_page *og);
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extern int      ogg_page_continued(ogg_page *og);
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extern int      ogg_page_bos(ogg_page *og);
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extern int      ogg_page_eos(ogg_page *og);
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extern ogg_int64_t  ogg_page_granulepos(ogg_page *og);
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extern ogg_uint32_t ogg_page_serialno(ogg_page *og);
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extern ogg_uint32_t ogg_page_pageno(ogg_page *og);
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extern int      ogg_page_packets(ogg_page *og);
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extern int      ogg_page_getbuffer(ogg_page *og, unsigned char **buffer);
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extern int      ogg_packet_release(ogg_packet *op);
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extern int      ogg_page_release(ogg_page *og);
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extern void     ogg_page_dup(ogg_page *d, ogg_page *s);
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/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/
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#define  OGG_SUCCESS   0
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#define  OGG_HOLE     -10
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#define  OGG_SPAN     -11
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#define  OGG_EVERSION -12
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#define  OGG_ESERIAL  -13
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#define  OGG_EINVAL   -14
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#define  OGG_EEOS     -15
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#ifdef __cplusplus
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}
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#endif
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#endif  /* _OGG_H */