1 /* 2 * Copyright (C) 2007 iptego GmbH 3 * 4 * This file is part of SEMS, a free SIP media server. 5 * 6 * SEMS is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * For a license to use the sems software under conditions 12 * other than those described here, or to purchase support for this 13 * software, please contact iptel.org by e-mail at the following addresses: 14 * info@iptel.org 15 * 16 * SEMS is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24 */ 25 /** @file AmCachedAudioFile.h */ 26 #ifndef _AMFILECACHE_H 27 #define _AMFILECACHE_H 28 29 #include "AmAudioFile.h" 30 31 #include <string> 32 33 /** 34 * \brief memory cache for AmAudioFile 35 * 36 * The AmFileCache class loads a file once into memory 37 * to be used e.g. by AmCachedAudioFile. 38 */ 39 class AmFileCache 40 { 41 void* data; 42 size_t data_size; 43 std::string name; 44 45 public: 46 AmFileCache(); 47 ~AmFileCache(); 48 49 /** load filename into memory 50 * @return 0 if everything's OK 51 */ 52 int load(const std::string& filename); 53 /** get the size of the file */ 54 size_t getSize(); 55 /** read size bytes from pos into buf */ 56 int read(void* buf, size_t* pos, size_t size); 57 /** get the filename */ 58 const string& getFilename(); 59 /** get a pointer to the file's data - use with caution! */ getData()60 void* getData() { return data; } 61 }; 62 63 /** 64 * \brief AmAudio implementation for cached file 65 * 66 * This uses an AmFileCache instance to read the data 67 * rather than a file. 68 */ 69 class AmCachedAudioFile 70 : public AmAudio 71 { 72 AmFileCache* cache; 73 /** current position */ 74 size_t fpos; 75 /** beginning of data in file */ 76 size_t begin; 77 bool good; 78 79 /** @see AmAudio::read */ 80 int read(unsigned int user_ts, unsigned int size); 81 82 /** @see AmAudio::write */ 83 int write(unsigned int user_ts, unsigned int size); 84 85 /** get the file format from the file name */ 86 AmAudioFileFormat* fileName2Fmt(const string& name); 87 88 /** Format of that file. @see fp, open(). */ 89 amci_inoutfmt_t* iofmt; 90 91 public: 92 AmCachedAudioFile(AmFileCache* cache); 93 ~AmCachedAudioFile(); 94 95 /** loop the file? */ 96 AmSharedVar<bool> loop; 97 98 /** 99 * Rewind the file. 100 */ 101 void rewind(); 102 103 /** Closes the file. */ 104 void close(); 105 106 /** everything ok? */ is_good()107 bool is_good() { return good; } 108 }; 109 #endif //_AMFILECACHE_H 110