git.r.bdr.sh - rbdr/super-polarity/blob

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: stdio-based convenience library for opening/seeking/decoding
  14  last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $
  15
  16  ********************************************************************/
  17
  18 #ifndef _OV_FILE_H_
  19 #define _OV_FILE_H_
  20
  21 #ifdef __cplusplus
  22 extern "C"
  23 {
  24 #endif /* __cplusplus */
  25
  26 #include <stdio.h>
  27 #include "codec.h"
  28
  29 /* The function prototypes for the callbacks are basically the same as for
  30  * the stdio functions fread, fseek, fclose, ftell.
  31  * The one difference is that the FILE * arguments have been replaced with
  32  * a void * - this is to be used as a pointer to whatever internal data these
  33  * functions might need. In the stdio case, it's just a FILE * cast to a void *
  34  *
  35  * If you use other functions, check the docs for these functions and return
  36  * the right values. For seek_func(), you *MUST* return -1 if the stream is
  37  * unseekable
  38  */
  39 typedef struct {
  40   size_t (*read_func)  (void *ptr, size_t size, size_t nmemb, void *datasource);
  41   int    (*seek_func)  (void *datasource, ogg_int64_t offset, int whence);
  42   int    (*close_func) (void *datasource);
  43   long   (*tell_func)  (void *datasource);
  44 } ov_callbacks;
  45
  46 #ifndef OV_EXCLUDE_STATIC_CALLBACKS
  47
  48 /* a few sets of convenient callbacks, especially for use under
  49  * Windows where ov_open_callbacks() should always be used instead of
  50  * ov_open() to avoid problems with incompatible crt.o version linking
  51  * issues. */
  52
  53 static int _ov_header_fseek_wrap(FILE *f,ogg_int64_t off,int whence){
  54   if(f==NULL)return(-1);
  55
  56 #ifdef __MINGW32__
  57   return fseeko64(f,off,whence);
  58 #elif defined (_WIN32)
  59   return _fseeki64(f,off,whence);
  60 #else
  61   return fseek(f,off,whence);
  62 #endif
  63 }
  64
  65 /* These structs below (OV_CALLBACKS_DEFAULT etc) are defined here as
  66  * static data. That means that every file which includes this header
  67  * will get its own copy of these structs whether it uses them or
  68  * not unless it #defines OV_EXCLUDE_STATIC_CALLBACKS.
  69  * These static symbols are essential on platforms such as Windows on
  70  * which several different versions of stdio support may be linked to
  71  * by different DLLs, and we need to be certain we know which one
  72  * we're using (the same one as the main application).
  73  */
  74
  75 static ov_callbacks OV_CALLBACKS_DEFAULT = {
  76   (size_t (*)(void *, size_t, size_t, void *))  fread,
  77   (int (*)(void *, ogg_int64_t, int))           _ov_header_fseek_wrap,
  78   (int (*)(void *))                             fclose,
  79   (long (*)(void *))                            ftell
  80 };
  81
  82 static ov_callbacks OV_CALLBACKS_NOCLOSE = {
  83   (size_t (*)(void *, size_t, size_t, void *))  fread,
  84   (int (*)(void *, ogg_int64_t, int))           _ov_header_fseek_wrap,
  85   (int (*)(void *))                             NULL,
  86   (long (*)(void *))                            ftell
  87 };
  88
  89 static ov_callbacks OV_CALLBACKS_STREAMONLY = {
  90   (size_t (*)(void *, size_t, size_t, void *))  fread,
  91   (int (*)(void *, ogg_int64_t, int))           NULL,
  92   (int (*)(void *))                             fclose,
  93   (long (*)(void *))                            NULL
  94 };
  95
  96 static ov_callbacks OV_CALLBACKS_STREAMONLY_NOCLOSE = {
  97   (size_t (*)(void *, size_t, size_t, void *))  fread,
  98   (int (*)(void *, ogg_int64_t, int))           NULL,
  99   (int (*)(void *))                             NULL,
 100   (long (*)(void *))                            NULL
 101 };
 102
 103 #endif
 104
 105 #define  NOTOPEN   0
 106 #define  PARTOPEN  1
 107 #define  OPENED    2
 108 #define  STREAMSET 3
 109 #define  INITSET   4
 110
 111 typedef struct OggVorbis_File {
 112   void            *datasource; /* Pointer to a FILE *, etc. */
 113   int              seekable;
 114   ogg_int64_t      offset;
 115   ogg_int64_t      end;
 116   ogg_sync_state   oy;
 117
 118   /* If the FILE handle isn't seekable (eg, a pipe), only the current
 119      stream appears */
 120   int              links;
 121   ogg_int64_t     *offsets;
 122   ogg_int64_t     *dataoffsets;
 123   long            *serialnos;
 124   ogg_int64_t     *pcmlengths; /* overloaded to maintain binary
 125                                   compatibility; x2 size, stores both
 126                                   beginning and end values */
 127   vorbis_info     *vi;
 128   vorbis_comment  *vc;
 129
 130   /* Decoding working state local storage */
 131   ogg_int64_t      pcm_offset;
 132   int              ready_state;
 133   long             current_serialno;
 134   int              current_link;
 135
 136   double           bittrack;
 137   double           samptrack;
 138
 139   ogg_stream_state os; /* take physical pages, weld into a logical
 140                           stream of packets */
 141   vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
 142   vorbis_block     vb; /* local working space for packet->PCM decode */
 143
 144   ov_callbacks callbacks;
 145
 146 } OggVorbis_File;
 147
 148
 149 extern int ov_clear(OggVorbis_File *vf);
 150 extern int ov_fopen(const char *path,OggVorbis_File *vf);
 151 extern int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes);
 152 extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf,
 153                 const char *initial, long ibytes, ov_callbacks callbacks);
 154
 155 extern int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes);
 156 extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf,
 157                 const char *initial, long ibytes, ov_callbacks callbacks);
 158 extern int ov_test_open(OggVorbis_File *vf);
 159
 160 extern long ov_bitrate(OggVorbis_File *vf,int i);
 161 extern long ov_bitrate_instant(OggVorbis_File *vf);
 162 extern long ov_streams(OggVorbis_File *vf);
 163 extern long ov_seekable(OggVorbis_File *vf);
 164 extern long ov_serialnumber(OggVorbis_File *vf,int i);
 165
 166 extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);
 167 extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);
 168 extern double ov_time_total(OggVorbis_File *vf,int i);
 169
 170 extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos);
 171 extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);
 172 extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
 173 extern int ov_time_seek(OggVorbis_File *vf,double pos);
 174 extern int ov_time_seek_page(OggVorbis_File *vf,double pos);
 175
 176 extern int ov_raw_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
 177 extern int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
 178 extern int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos);
 179 extern int ov_time_seek_lap(OggVorbis_File *vf,double pos);
 180 extern int ov_time_seek_page_lap(OggVorbis_File *vf,double pos);
 181
 182 extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf);
 183 extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);
 184 extern double ov_time_tell(OggVorbis_File *vf);
 185
 186 extern vorbis_info *ov_info(OggVorbis_File *vf,int link);
 187 extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link);
 188
 189 extern long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int samples,
 190                           int *bitstream);
 191 extern long ov_read_filter(OggVorbis_File *vf,char *buffer,int length,
 192                           int bigendianp,int word,int sgned,int *bitstream,
 193                           void (*filter)(float **pcm,long channels,long samples,void *filter_param),void *filter_param);
 194 extern long ov_read(OggVorbis_File *vf,char *buffer,int length,
 195                     int bigendianp,int word,int sgned,int *bitstream);
 196 extern int ov_crosslap(OggVorbis_File *vf1,OggVorbis_File *vf2);
 197
 198 extern int ov_halfrate(OggVorbis_File *vf,int flag);
 199 extern int ov_halfrate_p(OggVorbis_File *vf);
 200
 201 #ifdef __cplusplus
 202 }
 203 #endif /* __cplusplus */
 204
 205 #endif
 206