1 /************************************************************************ 2 * Copyright (C) 2002-2009, Xiph.org Foundation 3 * Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following disclaimer 14 * in the documentation and/or other materials provided with the 15 * distribution. 16 * * Neither the names of the Xiph.org Foundation nor Pinknoise 17 * Productions Ltd nor the names of its contributors may be used to 18 * endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 ************************************************************************ 33 34 function: stdio-based convenience library for opening/seeking/decoding 35 36 ************************************************************************/ 37 38 #ifndef _OV_FILE_H_ 39 #define _OV_FILE_H_ 40 41 #ifdef __cplusplus 42 extern "C" 43 { 44 #endif /* __cplusplus */ 45 46 #include <stdio.h> 47 #include "ivorbiscodec.h" 48 49 /* The function prototypes for the callbacks are basically the same as for 50 * the stdio functions fread, fseek, fclose, ftell. 51 * The one difference is that the FILE * arguments have been replaced with 52 * a void * - this is to be used as a pointer to whatever internal data these 53 * functions might need. In the stdio case, it's just a FILE * cast to a void * 54 * 55 * If you use other functions, check the docs for these functions and return 56 * the right values. For seek_func(), you *MUST* return -1 if the stream is 57 * unseekable 58 */ 59 typedef struct { 60 size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource); 61 int (*seek_func) (void *datasource, ogg_int64_t offset, int whence); 62 int (*close_func) (void *datasource); 63 long (*tell_func) (void *datasource); 64 } ov_callbacks; 65 66 typedef struct OggVorbis_File { 67 void *datasource; /* Pointer to a FILE *, etc. */ 68 int seekable; 69 ogg_int64_t offset; 70 ogg_int64_t end; 71 ogg_sync_state *oy; 72 73 /* If the FILE handle isn't seekable (eg, a pipe), only the current 74 stream appears */ 75 int links; 76 ogg_int64_t *offsets; 77 ogg_int64_t *dataoffsets; 78 ogg_uint32_t *serialnos; 79 ogg_int64_t *pcmlengths; 80 vorbis_info vi; 81 vorbis_comment vc; 82 83 /* Decoding working state local storage */ 84 ogg_int64_t pcm_offset; 85 int ready_state; 86 ogg_uint32_t current_serialno; 87 int current_link; 88 89 ogg_int64_t bittrack; 90 ogg_int64_t samptrack; 91 92 ogg_stream_state *os; /* take physical pages, weld into a logical 93 stream of packets */ 94 vorbis_dsp_state *vd; /* central working state for the packet->PCM decoder */ 95 96 ov_callbacks callbacks; 97 98 } OggVorbis_File; 99 100 extern int ov_clear(OggVorbis_File *vf); 101 extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); 102 extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf, 103 char *initial, long ibytes, ov_callbacks callbacks); 104 105 extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); 106 extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf, 107 char *initial, long ibytes, ov_callbacks callbacks); 108 extern int ov_test_open(OggVorbis_File *vf); 109 110 extern long ov_bitrate(OggVorbis_File *vf,int i); 111 extern long ov_bitrate_instant(OggVorbis_File *vf); 112 extern long ov_streams(OggVorbis_File *vf); 113 extern long ov_seekable(OggVorbis_File *vf); 114 extern long ov_serialnumber(OggVorbis_File *vf,int i); 115 116 extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i); 117 extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i); 118 extern ogg_int64_t ov_time_total(OggVorbis_File *vf,int i); 119 120 extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos); 121 extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos); 122 extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos); 123 extern int ov_time_seek(OggVorbis_File *vf,ogg_int64_t pos); 124 extern int ov_time_seek_page(OggVorbis_File *vf,ogg_int64_t pos); 125 126 extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf); 127 extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf); 128 extern ogg_int64_t ov_time_tell(OggVorbis_File *vf); 129 130 extern vorbis_info *ov_info(OggVorbis_File *vf,int link); 131 extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link); 132 133 extern long ov_read(OggVorbis_File *vf,void *buffer,int length, 134 int *bitstream); 135 136 #ifdef __cplusplus 137 } 138 #endif /* __cplusplus */ 139 140 #endif 141 142 143
