Mercurial > hg > svcore
comparison base/BaseTypes.h @ 1051:cafd65fc411b cxx11
Comments etc
author | Chris Cannam |
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date | Wed, 11 Mar 2015 09:29:44 +0000 |
parents | 10055a284716 |
children | d4a28d1479a8 54af1e21705c |
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1050:5ad98be7f635 | 1051:cafd65fc411b |
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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ | |
2 | |
3 /* | |
4 Sonic Visualiser | |
5 An audio file viewer and annotation editor. | |
6 Centre for Digital Music, Queen Mary, University of London. | |
7 | |
8 This program is free software; you can redistribute it and/or | |
9 modify it under the terms of the GNU General Public License as | |
10 published by the Free Software Foundation; either version 2 of the | |
11 License, or (at your option) any later version. See the file | |
12 COPYING included with this distribution for more information. | |
13 */ | |
1 | 14 |
2 #ifndef BASE_TYPES_H | 15 #ifndef BASE_TYPES_H |
3 #define BASE_TYPES_H | 16 #define BASE_TYPES_H |
4 | 17 |
5 #include <cstdint> | 18 #include <cstdint> |
6 | 19 |
20 /** Frame index, the unit of our time axis. This is signed because the | |
21 axis conceptually extends below zero: zero represents the start of | |
22 the main loaded audio model, not the start of time; a windowed | |
23 transform could legitimately produce results before then. We also | |
24 use this for frame counts, simply to avoid error-prone arithmetic | |
25 between signed and unsigned types. | |
26 */ | |
7 typedef int64_t sv_frame_t; | 27 typedef int64_t sv_frame_t; |
8 typedef double sv_samplerate_t; | |
9 | 28 |
29 /** Check whether an integer index is in range for a container, | |
30 avoiding overflows and signed/unsigned comparison warnings. | |
31 */ | |
10 template<typename T, typename C> | 32 template<typename T, typename C> |
11 bool in_range_for(const C &container, T i) | 33 bool in_range_for(const C &container, T i) |
12 { | 34 { |
13 if (i < 0) return false; | 35 if (i < 0) return false; |
14 if (sizeof(T) > sizeof(typename C::size_type)) { | 36 if (sizeof(T) > sizeof(typename C::size_type)) { |
16 } else { | 38 } else { |
17 return static_cast<typename C::size_type>(i) < container.size(); | 39 return static_cast<typename C::size_type>(i) < container.size(); |
18 } | 40 } |
19 } | 41 } |
20 | 42 |
43 /** Sample rate. We have to deal with sample rates provided as float | |
44 or (unsigned) int types, so we might as well have a type that can | |
45 represent both. Storage size isn't an issue anyway. | |
46 */ | |
47 typedef double sv_samplerate_t; | |
48 | |
21 #endif | 49 #endif |
50 |