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