aotuv-b5_20061024/include/vorbis/vorbisfile.h

   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 1994-2001             *
   9  * by the XIPHOPHORUS Company http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: stdio-based convenience library for opening/seeking/decoding
  14  last mod: $Id: vorbisfile.h 7485 2004-08-05 14:54:23Z thomasvs $
  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 #define  NOTOPEN   0
  47 #define  PARTOPEN  1
  48 #define  OPENED    2
  49 #define  STREAMSET 3
  50 #define  INITSET   4
  51
  52 typedef struct OggVorbis_File {
  53   void            *datasource; /* Pointer to a FILE *, etc. */
  54   int              seekable;
  55   ogg_int64_t      offset;
  56   ogg_int64_t      end;
  57   ogg_sync_state   oy;
  58
  59   /* If the FILE handle isn't seekable (eg, a pipe), only the current
  60      stream appears */
  61   int              links;
  62   ogg_int64_t     *offsets;
  63   ogg_int64_t     *dataoffsets;
  64   long            *serialnos;
  65   ogg_int64_t     *pcmlengths; /* overloaded to maintain binary
  66                                   compatability; x2 size, stores both
  67                                   beginning and end values */
  68   vorbis_info     *vi;
  69   vorbis_comment  *vc;
  70
  71   /* Decoding working state local storage */
  72   ogg_int64_t      pcm_offset;
  73   int              ready_state;
  74   long             current_serialno;
  75   int              current_link;
  76
  77   double           bittrack;
  78   double           samptrack;
  79
  80   ogg_stream_state os; /* take physical pages, weld into a logical
  81                           stream of packets */
  82   vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
  83   vorbis_block     vb; /* local working space for packet->PCM decode */
  84
  85   ov_callbacks callbacks;
  86
  87 } OggVorbis_File;
  88
  89 extern int ov_clear(OggVorbis_File *vf);
  90 extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
  91 extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf,
  92                 char *initial, long ibytes, ov_callbacks callbacks);
  93
  94 extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
  95 extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf,
  96                 char *initial, long ibytes, ov_callbacks callbacks);
  97 extern int ov_test_open(OggVorbis_File *vf);
  98
  99 extern long ov_bitrate(OggVorbis_File *vf,int i);
 100 extern long ov_bitrate_instant(OggVorbis_File *vf);
 101 extern long ov_streams(OggVorbis_File *vf);
 102 extern long ov_seekable(OggVorbis_File *vf);
 103 extern long ov_serialnumber(OggVorbis_File *vf,int i);
 104
 105 extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);
 106 extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);
 107 extern double ov_time_total(OggVorbis_File *vf,int i);
 108
 109 extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos);
 110 extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);
 111 extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
 112 extern int ov_time_seek(OggVorbis_File *vf,double pos);
 113 extern int ov_time_seek_page(OggVorbis_File *vf,double pos);
 114
 115 extern int ov_raw_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
 116 extern int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
 117 extern int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos);
 118 extern int ov_time_seek_lap(OggVorbis_File *vf,double pos);
 119 extern int ov_time_seek_page_lap(OggVorbis_File *vf,double pos);
 120
 121 extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf);
 122 extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);
 123 extern double ov_time_tell(OggVorbis_File *vf);
 124
 125 extern vorbis_info *ov_info(OggVorbis_File *vf,int link);
 126 extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link);
 127
 128 extern long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int samples,
 129                           int *bitstream);
 130 extern long ov_read(OggVorbis_File *vf,char *buffer,int length,
 131                     int bigendianp,int word,int sgned,int *bitstream);
 132 extern int ov_crosslap(OggVorbis_File *vf1,OggVorbis_File *vf2);
 133
 134 extern int ov_halfrate(OggVorbis_File *vf,int flag);
 135 extern int ov_halfrate_p(OggVorbis_File *vf);
 136
 137 #ifdef __cplusplus
 138 }
 139 #endif /* __cplusplus */
 140
 141 #endif
 142
 143