| /******************************************************************** |
| * * |
| * 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 http://www.xiph.org/ * |
| * * |
| ******************************************************************** |
| |
| function: stdio-based convenience library for opening/seeking/decoding |
| last mod: $Id: vorbisfile.h 17021 2010-03-24 09:29:41Z xiphmont $ |
| |
| ********************************************************************/ |
| |
| #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 |
| */ |
| typedef struct { |
| size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource); |
| int (*seek_func) (void *datasource, ogg_int64_t offset, int whence); |
| int (*close_func) (void *datasource); |
| long (*tell_func) (void *datasource); |
| } 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 0 |
| #define PARTOPEN 1 |
| #define OPENED 2 |
| #define STREAMSET 3 |
| #define INITSET 4 |
| |
| typedef struct OggVorbis_File { |
| void *datasource; /* Pointer to a FILE *, etc. */ |
| int seekable; |
| ogg_int64_t offset; |
| ogg_int64_t end; |
| ogg_sync_state oy; |
| |
| /* If the FILE handle isn't seekable (eg, a pipe), only the current |
| stream appears */ |
| int links; |
| ogg_int64_t *offsets; |
| ogg_int64_t *dataoffsets; |
| long *serialnos; |
| ogg_int64_t *pcmlengths; /* overloaded to maintain binary |
| compatibility; x2 size, stores both |
| beginning and end values */ |
| vorbis_info *vi; |
| vorbis_comment *vc; |
| |
| /* Decoding working state local storage */ |
| ogg_int64_t pcm_offset; |
| int ready_state; |
| long current_serialno; |
| int current_link; |
| |
| double bittrack; |
| double samptrack; |
| |
| ogg_stream_state os; /* take physical pages, weld into a logical |
| stream of packets */ |
| vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */ |
| vorbis_block vb; /* local working space for packet->PCM decode */ |
| |
| ov_callbacks callbacks; |
| |
| } OggVorbis_File; |
| |
| |
| extern int ov_clear(OggVorbis_File *vf); |
| extern int ov_fopen(char *path,OggVorbis_File *vf); |
| extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); |
| extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf, |
| char *initial, long ibytes, ov_callbacks callbacks); |
| |
| extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); |
| extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf, |
| 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 |
| |
