author | koda |
Wed, 02 May 2012 08:07:17 +0100 | |
changeset 6986 | 409dd3851309 |
parent 6045 | 9a7cc0f29430 |
child 7697 | 767d3c4153a1 |
permissions | -rw-r--r-- |
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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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