cannam@86: /******************************************************************** cannam@86: * * cannam@86: * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * cannam@86: * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * cannam@86: * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * cannam@86: * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * cannam@86: * * cannam@86: * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * cannam@86: * by the Xiph.Org Foundation http://www.xiph.org/ * cannam@86: * * cannam@86: ******************************************************************** cannam@86: cannam@86: function: stdio-based convenience library for opening/seeking/decoding cannam@86: last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $ cannam@86: cannam@86: ********************************************************************/ cannam@86: cannam@86: #ifndef _OV_FILE_H_ cannam@86: #define _OV_FILE_H_ cannam@86: cannam@86: #ifdef __cplusplus cannam@86: extern "C" cannam@86: { cannam@86: #endif /* __cplusplus */ cannam@86: cannam@86: #include cannam@86: #include "codec.h" cannam@86: cannam@86: /* The function prototypes for the callbacks are basically the same as for cannam@86: * the stdio functions fread, fseek, fclose, ftell. cannam@86: * The one difference is that the FILE * arguments have been replaced with cannam@86: * a void * - this is to be used as a pointer to whatever internal data these cannam@86: * functions might need. In the stdio case, it's just a FILE * cast to a void * cannam@86: * cannam@86: * If you use other functions, check the docs for these functions and return cannam@86: * the right values. For seek_func(), you *MUST* return -1 if the stream is cannam@86: * unseekable cannam@86: */ cannam@86: typedef struct { cannam@86: size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource); cannam@86: int (*seek_func) (void *datasource, ogg_int64_t offset, int whence); cannam@86: int (*close_func) (void *datasource); cannam@86: long (*tell_func) (void *datasource); cannam@86: } ov_callbacks; cannam@86: cannam@86: #ifndef OV_EXCLUDE_STATIC_CALLBACKS cannam@86: cannam@86: /* a few sets of convenient callbacks, especially for use under cannam@86: * Windows where ov_open_callbacks() should always be used instead of cannam@86: * ov_open() to avoid problems with incompatible crt.o version linking cannam@86: * issues. */ cannam@86: cannam@86: static int _ov_header_fseek_wrap(FILE *f,ogg_int64_t off,int whence){ cannam@86: if(f==NULL)return(-1); cannam@86: cannam@86: #ifdef __MINGW32__ cannam@86: return fseeko64(f,off,whence); cannam@86: #elif defined (_WIN32) cannam@86: return _fseeki64(f,off,whence); cannam@86: #else cannam@86: return fseek(f,off,whence); cannam@86: #endif cannam@86: } cannam@86: cannam@86: /* These structs below (OV_CALLBACKS_DEFAULT etc) are defined here as cannam@86: * static data. That means that every file which includes this header cannam@86: * will get its own copy of these structs whether it uses them or cannam@86: * not unless it #defines OV_EXCLUDE_STATIC_CALLBACKS. cannam@86: * These static symbols are essential on platforms such as Windows on cannam@86: * which several different versions of stdio support may be linked to cannam@86: * by different DLLs, and we need to be certain we know which one cannam@86: * we're using (the same one as the main application). cannam@86: */ cannam@86: cannam@86: static ov_callbacks OV_CALLBACKS_DEFAULT = { cannam@86: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@86: (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap, cannam@86: (int (*)(void *)) fclose, cannam@86: (long (*)(void *)) ftell cannam@86: }; cannam@86: cannam@86: static ov_callbacks OV_CALLBACKS_NOCLOSE = { cannam@86: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@86: (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap, cannam@86: (int (*)(void *)) NULL, cannam@86: (long (*)(void *)) ftell cannam@86: }; cannam@86: cannam@86: static ov_callbacks OV_CALLBACKS_STREAMONLY = { cannam@86: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@86: (int (*)(void *, ogg_int64_t, int)) NULL, cannam@86: (int (*)(void *)) fclose, cannam@86: (long (*)(void *)) NULL cannam@86: }; cannam@86: cannam@86: static ov_callbacks OV_CALLBACKS_STREAMONLY_NOCLOSE = { cannam@86: (size_t (*)(void *, size_t, size_t, void *)) fread, cannam@86: (int (*)(void *, ogg_int64_t, int)) NULL, cannam@86: (int (*)(void *)) NULL, cannam@86: (long (*)(void *)) NULL cannam@86: }; cannam@86: cannam@86: #endif cannam@86: cannam@86: #define NOTOPEN 0 cannam@86: #define PARTOPEN 1 cannam@86: #define OPENED 2 cannam@86: #define STREAMSET 3 cannam@86: #define INITSET 4 cannam@86: cannam@86: typedef struct OggVorbis_File { cannam@86: void *datasource; /* Pointer to a FILE *, etc. */ cannam@86: int seekable; cannam@86: ogg_int64_t offset; cannam@86: ogg_int64_t end; cannam@86: ogg_sync_state oy; cannam@86: cannam@86: /* If the FILE handle isn't seekable (eg, a pipe), only the current cannam@86: stream appears */ cannam@86: int links; cannam@86: ogg_int64_t *offsets; cannam@86: ogg_int64_t *dataoffsets; cannam@86: long *serialnos; cannam@86: ogg_int64_t *pcmlengths; /* overloaded to maintain binary cannam@86: compatibility; x2 size, stores both cannam@86: beginning and end values */ cannam@86: vorbis_info *vi; cannam@86: vorbis_comment *vc; cannam@86: cannam@86: /* Decoding working state local storage */ cannam@86: ogg_int64_t pcm_offset; cannam@86: int ready_state; cannam@86: long current_serialno; cannam@86: int current_link; cannam@86: cannam@86: double bittrack; cannam@86: double samptrack; cannam@86: cannam@86: ogg_stream_state os; /* take physical pages, weld into a logical cannam@86: stream of packets */ cannam@86: vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */ cannam@86: vorbis_block vb; /* local working space for packet->PCM decode */ cannam@86: cannam@86: ov_callbacks callbacks; cannam@86: cannam@86: } OggVorbis_File; cannam@86: cannam@86: cannam@86: extern int ov_clear(OggVorbis_File *vf); cannam@86: extern int ov_fopen(const char *path,OggVorbis_File *vf); cannam@86: extern int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); cannam@86: extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf, cannam@86: const char *initial, long ibytes, ov_callbacks callbacks); cannam@86: cannam@86: extern int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); cannam@86: extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf, cannam@86: const char *initial, long ibytes, ov_callbacks callbacks); cannam@86: extern int ov_test_open(OggVorbis_File *vf); cannam@86: cannam@86: extern long ov_bitrate(OggVorbis_File *vf,int i); cannam@86: extern long ov_bitrate_instant(OggVorbis_File *vf); cannam@86: extern long ov_streams(OggVorbis_File *vf); cannam@86: extern long ov_seekable(OggVorbis_File *vf); cannam@86: extern long ov_serialnumber(OggVorbis_File *vf,int i); cannam@86: cannam@86: extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i); cannam@86: extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i); cannam@86: extern double ov_time_total(OggVorbis_File *vf,int i); cannam@86: cannam@86: extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_time_seek(OggVorbis_File *vf,double pos); cannam@86: extern int ov_time_seek_page(OggVorbis_File *vf,double pos); cannam@86: cannam@86: extern int ov_raw_seek_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos); cannam@86: extern int ov_time_seek_lap(OggVorbis_File *vf,double pos); cannam@86: extern int ov_time_seek_page_lap(OggVorbis_File *vf,double pos); cannam@86: cannam@86: extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf); cannam@86: extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf); cannam@86: extern double ov_time_tell(OggVorbis_File *vf); cannam@86: cannam@86: extern vorbis_info *ov_info(OggVorbis_File *vf,int link); cannam@86: extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link); cannam@86: cannam@86: extern long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int samples, cannam@86: int *bitstream); cannam@86: extern long ov_read_filter(OggVorbis_File *vf,char *buffer,int length, cannam@86: int bigendianp,int word,int sgned,int *bitstream, cannam@86: void (*filter)(float **pcm,long channels,long samples,void *filter_param),void *filter_param); cannam@86: extern long ov_read(OggVorbis_File *vf,char *buffer,int length, cannam@86: int bigendianp,int word,int sgned,int *bitstream); cannam@86: extern int ov_crosslap(OggVorbis_File *vf1,OggVorbis_File *vf2); cannam@86: cannam@86: extern int ov_halfrate(OggVorbis_File *vf,int flag); cannam@86: extern int ov_halfrate_p(OggVorbis_File *vf); cannam@86: cannam@86: #ifdef __cplusplus cannam@86: } cannam@86: #endif /* __cplusplus */ cannam@86: cannam@86: #endif cannam@86: