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/********************************************************************

 *                                                                  *

 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *

 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *

 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *

 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *

 *                                                                  *

 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *

 * by the Xiph.Org Foundation http://www.xiph.org/                  *

 *                                                                  *

 ********************************************************************

 function: stdio-based convenience library for opening/seeking/decoding

 last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $

 ********************************************************************/

#ifndef _OV_FILE_H_

#define _OV_FILE_H_

#ifdef __cplusplus

extern "C"

{

#endif /* __cplusplus */

#include <stdio.h>

#include "codec.h"

/* The function prototypes for the callbacks are basically the same as for

 * the stdio functions fread, fseek, fclose, ftell.

 * The one difference is that the FILE * arguments have been replaced with

 * a void * - this is to be used as a pointer to whatever internal data these

 * functions might need. In the stdio case, it's just a FILE * cast to a void *

 *

 * If you use other functions, check the docs for these functions and return

 * the right values. For seek_func(), you *MUST* return -1 if the stream is

 * unseekable

 */

typedef struct {

  size_t (*read_func)  (void *ptr, size_t size, size_t nmemb, void *datasource);

  int    (*seek_func)  (void *datasource, ogg_int64_t offset, int whence);

  int    (*close_func) (void *datasource);

  long   (*tell_func)  (void *datasource);

} ov_callbacks;

#ifndef OV_EXCLUDE_STATIC_CALLBACKS

/* a few sets of convenient callbacks, especially for use under

 * Windows where ov_open_callbacks() should always be used instead of

 * ov_open() to avoid problems with incompatible crt.o version linking

 * issues. */

static int _ov_header_fseek_wrap(FILE *f,ogg_int64_t off,int whence){

  if(f==NULL)return(-1);

#ifdef __MINGW32__

  return fseeko64(f,off,whence);

#elif defined (_WIN32)

  return _fseeki64(f,off,whence);

#else

  return fseek(f,off,whence);

#endif

}

/* These structs below (OV_CALLBACKS_DEFAULT etc) are defined here as

 * static data. That means that every file which includes this header

 * will get its own copy of these structs whether it uses them or

 * not unless it #defines OV_EXCLUDE_STATIC_CALLBACKS.

 * These static symbols are essential on platforms such as Windows on

 * which several different versions of stdio support may be linked to

 * by different DLLs, and we need to be certain we know which one

 * we're using (the same one as the main application).

 */

static ov_callbacks OV_CALLBACKS_DEFAULT = {

  (size_t (*)(void *, size_t, size_t, void *))  fread,

  (int (*)(void *, ogg_int64_t, int))           _ov_header_fseek_wrap,

  (int (*)(void *))                             fclose,

  (long (*)(void *))                            ftell

};

static ov_callbacks OV_CALLBACKS_NOCLOSE = {

  (size_t (*)(void *, size_t, size_t, void *))  fread,

  (int (*)(void *, ogg_int64_t, int))           _ov_header_fseek_wrap,

  (int (*)(void *))                             NULL,

  (long (*)(void *))                            ftell

};

static ov_callbacks OV_CALLBACKS_STREAMONLY = {

  (size_t (*)(void *, size_t, size_t, void *))  fread,

  (int (*)(void *, ogg_int64_t, int))           NULL,

  (int (*)(void *))                             fclose,

  (long (*)(void *))                            NULL

};

static ov_callbacks OV_CALLBACKS_STREAMONLY_NOCLOSE = {

  (size_t (*)(void *, size_t, size_t, void *))  fread,

  (int (*)(void *, ogg_int64_t, int))           NULL,

  (int (*)(void *))                             NULL,

  (long (*)(void *))                            NULL

};

#endif

#define  NOTOPEN   0

#define  PARTOPEN  1

#define  OPENED    2

#define  STREAMSET 3

#define  INITSET   4

typedef struct OggVorbis_File {

  void            *datasource; /* Pointer to a FILE *, etc. */

  int              seekable;

  ogg_int64_t      offset;

  ogg_int64_t      end;

  ogg_sync_state   oy;

  /* If the FILE handle isn't seekable (eg, a pipe), only the current

     stream appears */

  int              links;

  ogg_int64_t     *offsets;

  ogg_int64_t     *dataoffsets;

  long            *serialnos;

  ogg_int64_t     *pcmlengths; /* overloaded to maintain binary

                                  compatibility; x2 size, stores both

                                  beginning and end values */

  vorbis_info     *vi;

  vorbis_comment  *vc;

  /* Decoding working state local storage */

  ogg_int64_t      pcm_offset;

  int              ready_state;

  long             current_serialno;

  int              current_link;

  double           bittrack;

  double           samptrack;

  ogg_stream_state os; /* take physical pages, weld into a logical

                          stream of packets */

  vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */

  vorbis_block     vb; /* local working space for packet->PCM decode */

  ov_callbacks callbacks;

} OggVorbis_File;

extern int ov_clear(OggVorbis_File *vf);

extern int ov_fopen(const char *path,OggVorbis_File *vf);

extern int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes);

extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf,

                const char *initial, long ibytes, ov_callbacks callbacks);

extern int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes);

extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf,

                const char *initial, long ibytes, ov_callbacks callbacks);

extern int ov_test_open(OggVorbis_File *vf);

extern long ov_bitrate(OggVorbis_File *vf,int i);

extern long ov_bitrate_instant(OggVorbis_File *vf);

extern long ov_streams(OggVorbis_File *vf);

extern long ov_seekable(OggVorbis_File *vf);

extern long ov_serialnumber(OggVorbis_File *vf,int i);

extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);

extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);

extern double ov_time_total(OggVorbis_File *vf,int i);

extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_time_seek(OggVorbis_File *vf,double pos);

extern int ov_time_seek_page(OggVorbis_File *vf,double pos);

extern int ov_raw_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos);

extern int ov_time_seek_lap(OggVorbis_File *vf,double pos);

extern int ov_time_seek_page_lap(OggVorbis_File *vf,double pos);

extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf);

extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);

extern double ov_time_tell(OggVorbis_File *vf);

extern vorbis_info *ov_info(OggVorbis_File *vf,int link);

extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link);

extern long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int samples,

                          int *bitstream);

extern long ov_read_filter(OggVorbis_File *vf,char *buffer,int length,

                          int bigendianp,int word,int sgned,int *bitstream,

                          void (*filter)(float **pcm,long channels,long samples,void *filter_param),void *filter_param);

extern long ov_read(OggVorbis_File *vf,char *buffer,int length,

                    int bigendianp,int word,int sgned,int *bitstream);

extern int ov_crosslap(OggVorbis_File *vf1,OggVorbis_File *vf2);

extern int ov_halfrate(OggVorbis_File *vf,int flag);

extern int ov_halfrate_p(OggVorbis_File *vf);

#ifdef __cplusplus

}

#endif /* __cplusplus */

#endif