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112 lines
2.8 KiB
112 lines
2.8 KiB
/*
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* $Id: AmFileCache.h 145 2006-11-26 00:01:18Z sayer $
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*
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* Copyright (C) 2007 iptego GmbH
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*
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* This file is part of sems, a free SIP media server.
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*
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* sems is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* For a license to use the sems software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* sems is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/** @file AmCachedAudioFile.h */
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#ifndef _AMFILECACHE_H
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#define _AMFILECACHE_H
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#include "AmAudioFile.h"
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#include <string>
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/**
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* \brief memory cache for AmAudioFile
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*
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* The AmFileCache class loads a file once into memory
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* to be used e.g. by AmCachedAudioFile.
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*/
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class AmFileCache
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{
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void* data;
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size_t data_size;
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std::string name;
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public:
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AmFileCache();
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~AmFileCache();
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/** load filename into memory
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* @return 0 if everything's OK
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*/
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int load(const std::string& filename);
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/** get the size of the file */
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size_t getSize();
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/** read size bytes from pos into buf */
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int read(void* buf, size_t* pos, size_t size);
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/** get the filename */
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const string& getFilename();
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/** get a pointer to the file's data - use with caution! */
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void* getData() { return data; }
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};
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/**
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* \brief AmAudio implementation for cached file
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*
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* This uses an AmFileCache instance to read the data
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* rather than a file.
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*/
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class AmCachedAudioFile
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: public AmAudio
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{
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AmFileCache* cache;
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/** current position */
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size_t fpos;
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/** beginning of data in file */
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size_t begin;
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bool good;
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/** @see AmAudio::read */
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int read(unsigned int user_ts, unsigned int size);
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/** @see AmAudio::write */
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int write(unsigned int user_ts, unsigned int size);
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/** get the file format from the file name */
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AmAudioFileFormat* fileName2Fmt(const string& name);
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/** Format of that file. @see fp, open(). */
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amci_inoutfmt_t* iofmt;
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public:
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AmCachedAudioFile(AmFileCache* cache);
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~AmCachedAudioFile();
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/** loop the file? */
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AmSharedVar<bool> loop;
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/**
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* Rewind the file.
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*/
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void rewind();
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/** Closes the file. */
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void close();
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/** everything ok? */
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bool is_good() { return good; }
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};
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#endif //_AMFILECACHE_H
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