misc/libtremor/ivorbisfile.h
author Xeli
Thu, 04 Aug 2011 17:35:42 +0200
branchhedgeroid
changeset 5471 081bc0170623
parent 5170 f7e49eff3708
permissions -rw-r--r--
Main activity for starting a local game
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/********************************************************************
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 *                                                                  *
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 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
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 *                                                                  *
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 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
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 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
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 *                                                                  *
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 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
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 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
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 *                                                                  *
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 ********************************************************************
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 function: stdio-based convenience library for opening/seeking/decoding
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 ********************************************************************/
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#ifndef _OV_FILE_H_
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#define _OV_FILE_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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#include <stdio.h>
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#include "ivorbiscodec.h"
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#define CHUNKSIZE 1024
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/* The function prototypes for the callbacks are basically the same as for
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 * the stdio functions fread, fseek, fclose, ftell. 
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 * The one difference is that the FILE * arguments have been replaced with
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 * a void * - this is to be used as a pointer to whatever internal data these
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 * functions might need. In the stdio case, it's just a FILE * cast to a void *
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 * 
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 * If you use other functions, check the docs for these functions and return
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 * the right values. For seek_func(), you *MUST* return -1 if the stream is
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 * unseekable
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 */
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typedef struct {
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  size_t (*read_func)  (void *ptr, size_t size, size_t nmemb, void *datasource);
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  int    (*seek_func)  (void *datasource, ogg_int64_t offset, int whence);
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  int    (*close_func) (void *datasource);
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  long   (*tell_func)  (void *datasource);
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} ov_callbacks;
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#define  NOTOPEN   0
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#define  PARTOPEN  1
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#define  OPENED    2
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#define  STREAMSET 3
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#define  INITSET   4
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typedef struct OggVorbis_File {
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  void            *datasource; /* Pointer to a FILE *, etc. */
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  int              seekable;
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  ogg_int64_t      offset;
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  ogg_int64_t      end;
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  ogg_sync_state   *oy; 
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  /* If the FILE handle isn't seekable (eg, a pipe), only the current
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     stream appears */
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  int              links;
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  ogg_int64_t     *offsets;
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  ogg_int64_t     *dataoffsets;
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  ogg_uint32_t    *serialnos;
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  ogg_int64_t     *pcmlengths;
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  vorbis_info     *vi;
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  vorbis_comment  *vc;
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  /* Decoding working state local storage */
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  ogg_int64_t      pcm_offset;
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  int              ready_state;
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  ogg_uint32_t     current_serialno;
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  int              current_link;
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  ogg_int64_t      bittrack;
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  ogg_int64_t      samptrack;
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  ogg_stream_state *os; /* take physical pages, weld into a logical
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                          stream of packets */
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  vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
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  vorbis_block     vb; /* local working space for packet->PCM decode */
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  ov_callbacks callbacks;
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} OggVorbis_File;
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extern int ov_clear(OggVorbis_File *vf);
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extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
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extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf,
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		char *initial, long ibytes, ov_callbacks callbacks);
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extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
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extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf,
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		char *initial, long ibytes, ov_callbacks callbacks);
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extern int ov_test_open(OggVorbis_File *vf);
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extern long ov_bitrate(OggVorbis_File *vf,int i);
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extern long ov_bitrate_instant(OggVorbis_File *vf);
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extern long ov_streams(OggVorbis_File *vf);
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extern long ov_seekable(OggVorbis_File *vf);
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extern long ov_serialnumber(OggVorbis_File *vf,int i);
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extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);
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extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);
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extern ogg_int64_t ov_time_total(OggVorbis_File *vf,int i);
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extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos);
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extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);
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extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
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extern int ov_time_seek(OggVorbis_File *vf,ogg_int64_t pos);
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extern int ov_time_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
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extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf);
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extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);
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extern ogg_int64_t ov_time_tell(OggVorbis_File *vf);
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extern vorbis_info *ov_info(OggVorbis_File *vf,int link);
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extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link);
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extern long ov_read(OggVorbis_File *vf,char *buffer,int length,
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		    int *bitstream);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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