ref: 688c1f15cdaa5fcad19d9fddb30e1c555bfc59e0
dir: /sys/src/cmd/audio/libvorbis/vorbis/vorbisfile.h/
/******************************************************************** * * * 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 1994-2001 * * by the XIPHOPHORUS Company http://www.xiph.org/ * * * ******************************************************************** function: stdio-based convenience library for opening/seeking/decoding last mod: $Id: vorbisfile.h,v 1.17 2002/03/07 03:41:03 xiphmont Exp $ ********************************************************************/ #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; #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 compatability; 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_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 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(OggVorbis_File *vf,char *buffer,int length, int bigendianp,int word,int sgned,int *bitstream); #ifdef __cplusplus } #endif /* __cplusplus */ #endif