1 // -*- Mode: C++; tab-width:2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 // vi:tw=80:et:ts=2:sts=2
3 //
4 // -----------------------------------------------------------------------
5 //
6 // This file is part of RLVM, a RealLive virtual machine clone.
7 //
8 // -----------------------------------------------------------------------
9 //
10 // Copyright (C) 2009 Elliot Glaysher
11 //
12 // This program is free software; you can redistribute it and/or modify
13 // it under the terms of the GNU General Public License as published by
14 // the Free Software Foundation; either version 3 of the License, or
15 // (at your option) any later version.
16 //
17 // This program is distributed in the hope that it will be useful,
18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 // GNU General Public License for more details.
21 //
22 // You should have received a copy of the GNU General Public License
23 // along with this program; if not, write to the Free Software
24 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
25 // -----------------------------------------------------------------------
26 
27 #ifndef SRC_SYSTEMS_BASE_VOICE_CACHE_H_
28 #define SRC_SYSTEMS_BASE_VOICE_CACHE_H_
29 
30 #include <memory>
31 
32 #include "lru_cache.hpp"
33 
34 class SoundSystem;
35 class VoiceArchive;
36 class VoiceSample;
37 
38 class VoiceCache {
39  public:
40   explicit VoiceCache(SoundSystem& sound_system);
41   ~VoiceCache();
42 
43   std::shared_ptr<VoiceSample> Find(int id);
44 
45  private:
46   // Searches for a file archive of voices.
47   std::shared_ptr<VoiceArchive> FindArchive(int file_no) const;
48 
49   // Searches for an unarchived ogg or mp3 file.
50   std::shared_ptr<VoiceSample> FindUnpackedSample(int file_no,
51                                                     int index) const;
52 
53   SoundSystem& sound_system_;
54 
55   // A mapping between a file id number and the underlying file object.
56   LRUCache<int, std::shared_ptr<VoiceArchive>> file_cache_;
57 };  // class VoiceCache
58 
59 #endif  // SRC_SYSTEMS_BASE_VOICE_CACHE_H_
60