/******************************************************************** * * * 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 https://xiph.org/ * * * ******************************************************************** function: stdio-based convenience library for opening/seeking/decoding ********************************************************************/ #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 */ 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 … #define PARTOPEN … #define OPENED … #define STREAMSET … #define INITSET … 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
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