cannam@120: /******************************************************************** cannam@120: * * cannam@120: * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * cannam@120: * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * cannam@120: * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * cannam@120: * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * cannam@120: * * cannam@120: * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * cannam@120: * by the Xiph.Org Foundation http://www.xiph.org/ * cannam@120: * * cannam@120: ******************************************************************** cannam@120: cannam@120: function: stdio-based convenience library for opening/seeking/decoding cannam@120: last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $ cannam@120: cannam@120: ********************************************************************/ cannam@120: cannam@120: #ifndef _OV_FILE_H_ cannam@120: #define _OV_FILE_H_ cannam@120: cannam@120: #ifdef __cplusplus cannam@120: extern "C" cannam@120: { cannam@120: #endif /* __cplusplus */ cannam@120: cannam@120: #include cannam@120: #include "codec.h" cannam@120: cannam@120: /* The function prototypes for the callbacks are basically the same as for cannam@120: * the stdio functions fread, fseek, fclose, ftell. cannam@120: * The one difference is that the FILE * arguments have been replaced with cannam@120: * a void * - this is to be used as a pointer to whatever internal data these cannam@120: * functions might need. In the stdio case, it's just a FILE * cast to a void * cannam@120: * cannam@120: * If you use other functions, check the docs for these functions and return cannam@120: * the right values. For seek_func(), you *MUST* return -1 if the stream is cannam@120: * unseekable cannam@120: */ cannam@120: typedef struct { cannam@120: size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource); cannam@120: int (*seek_func) (void *datasource, ogg_int64_t offset, int whence); cannam@120: int (*close_func) (void *datasource); cannam@120: long (*tell_func) (void *datasource); cannam@120: } ov_callbacks; cannam@120: cannam@120: #ifndef OV_EXCLUDE_STATIC_CALLBACKS cannam@120: cannam@120: /* a few sets of convenient callbacks, especially for use under cannam@120: * Windows where ov_open_callbacks() should always be used instead of cannam@120: * ov_open() to avoid problems with incompatible crt.o version linking cannam@120: * issues. */ cannam@120: cannam@120: static int _ov_header_fseek_wrap(FILE *f,ogg_int64_t off,int whence){ cannam@120: if(f==NULL)return(-1); cannam@120: cannam@120: #ifdef __MINGW32__ cannam@120: return fseeko64(f,off,whence); cannam@120: #elif defined (_WIN32) cannam@120: return _fseeki64(f,off,whence); cannam@120: #else cannam@120: return fseek(f,off,whence); cannam@120: #endif cannam@120: } cannam@120: cannam@120: /* These structs below (OV_CALLBACKS_DEFAULT etc) are defined here as cannam@120: * static data. That means that every file which includes this header cannam@120: * will get its own copy of these structs whether it uses them or cannam@120: * not unless it #defines OV_EXCLUDE_STATIC_CALLBACKS. cannam@120: * These static symbols are essential on platforms such as Windows on cannam@120: * which several different versions of stdio support may be linked to cannam@120: * by different DLLs, and we need to be certain we know which one cannam@120: * we're using (the same one as the main application). cannam@120: */ cannam@120: cannam@120: static ov_callbacks OV_CALLBACKS_DEFAULT = { cannam@120: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@120: (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap, cannam@120: (int (*)(void *)) fclose, cannam@120: (long (*)(void *)) ftell cannam@120: }; cannam@120: cannam@120: static ov_callbacks OV_CALLBACKS_NOCLOSE = { cannam@120: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@120: (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap, cannam@120: (int (*)(void *)) NULL, cannam@120: (long (*)(void *)) ftell cannam@120: }; cannam@120: cannam@120: static ov_callbacks OV_CALLBACKS_STREAMONLY = { cannam@120: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@120: (int (*)(void *, ogg_int64_t, int)) NULL, cannam@120: (int (*)(void *)) fclose, cannam@120: (long (*)(void *)) NULL cannam@120: }; cannam@120: cannam@120: static ov_callbacks OV_CALLBACKS_STREAMONLY_NOCLOSE = { cannam@120: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@120: (int (*)(void *, ogg_int64_t, int)) NULL, cannam@120: (int (*)(void *)) NULL, cannam@120: (long (*)(void *)) NULL cannam@120: }; cannam@120: cannam@120: #endif cannam@120: cannam@120: #define NOTOPEN 0 cannam@120: #define PARTOPEN 1 cannam@120: #define OPENED 2 cannam@120: #define STREAMSET 3 cannam@120: #define INITSET 4 cannam@120: cannam@120: typedef struct OggVorbis_File { cannam@120: void *datasource; /* Pointer to a FILE *, etc. */ cannam@120: int seekable; cannam@120: ogg_int64_t offset; cannam@120: ogg_int64_t end; cannam@120: ogg_sync_state oy; cannam@120: cannam@120: /* If the FILE handle isn't seekable (eg, a pipe), only the current cannam@120: stream appears */ cannam@120: int links; cannam@120: ogg_int64_t *offsets; cannam@120: ogg_int64_t *dataoffsets; cannam@120: long *serialnos; cannam@120: ogg_int64_t *pcmlengths; /* overloaded to maintain binary cannam@120: compatibility; x2 size, stores both cannam@120: beginning and end values */ cannam@120: vorbis_info *vi; cannam@120: vorbis_comment *vc; cannam@120: cannam@120: /* Decoding working state local storage */ cannam@120: ogg_int64_t pcm_offset; cannam@120: int ready_state; cannam@120: long current_serialno; cannam@120: int current_link; cannam@120: cannam@120: double bittrack; cannam@120: double samptrack; cannam@120: cannam@120: ogg_stream_state os; /* take physical pages, weld into a logical cannam@120: stream of packets */ cannam@120: vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */ cannam@120: vorbis_block vb; /* local working space for packet->PCM decode */ cannam@120: cannam@120: ov_callbacks callbacks; cannam@120: cannam@120: } OggVorbis_File; cannam@120: cannam@120: cannam@120: extern int ov_clear(OggVorbis_File *vf); cannam@120: extern int ov_fopen(const char *path,OggVorbis_File *vf); cannam@120: extern int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); cannam@120: extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf, cannam@120: const char *initial, long ibytes, ov_callbacks callbacks); cannam@120: cannam@120: extern int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); cannam@120: extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf, cannam@120: const char *initial, long ibytes, ov_callbacks callbacks); cannam@120: extern int ov_test_open(OggVorbis_File *vf); cannam@120: cannam@120: extern long ov_bitrate(OggVorbis_File *vf,int i); cannam@120: extern long ov_bitrate_instant(OggVorbis_File *vf); cannam@120: extern long ov_streams(OggVorbis_File *vf); cannam@120: extern long ov_seekable(OggVorbis_File *vf); cannam@120: extern long ov_serialnumber(OggVorbis_File *vf,int i); cannam@120: cannam@120: extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i); cannam@120: extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i); cannam@120: extern double ov_time_total(OggVorbis_File *vf,int i); cannam@120: cannam@120: extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_time_seek(OggVorbis_File *vf,double pos); cannam@120: extern int ov_time_seek_page(OggVorbis_File *vf,double pos); cannam@120: cannam@120: extern int ov_raw_seek_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@120: extern int ov_time_seek_lap(OggVorbis_File *vf,double pos); cannam@120: extern int ov_time_seek_page_lap(OggVorbis_File *vf,double pos); cannam@120: cannam@120: extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf); cannam@120: extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf); cannam@120: extern double ov_time_tell(OggVorbis_File *vf); cannam@120: cannam@120: extern vorbis_info *ov_info(OggVorbis_File *vf,int link); cannam@120: extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link); cannam@120: cannam@120: extern long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int samples, cannam@120: int *bitstream); cannam@120: extern long ov_read_filter(OggVorbis_File *vf,char *buffer,int length, cannam@120: int bigendianp,int word,int sgned,int *bitstream, cannam@120: void (*filter)(float **pcm,long channels,long samples,void *filter_param),void *filter_param); cannam@120: extern long ov_read(OggVorbis_File *vf,char *buffer,int length, cannam@120: int bigendianp,int word,int sgned,int *bitstream); cannam@120: extern int ov_crosslap(OggVorbis_File *vf1,OggVorbis_File *vf2); cannam@120: cannam@120: extern int ov_halfrate(OggVorbis_File *vf,int flag); cannam@120: extern int ov_halfrate_p(OggVorbis_File *vf); cannam@120: cannam@120: #ifdef __cplusplus cannam@120: } cannam@120: #endif /* __cplusplus */ cannam@120: cannam@120: #endif cannam@120: