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 142 143 144