1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#ifndef AUDIOGRAPHER_TYPE_UTILS_H
#define AUDIOGRAPHER_TYPE_UTILS_H
#include <boost/static_assert.hpp>
#include <boost/type_traits.hpp>
#include <memory>
#include <algorithm>
#include <cstring>
#include "audiographer/visibility.h"
#include "audiographer/types.h"
namespace AudioGrapher
{
/// Non-template base class for TypeUtils
class LIBAUDIOGRAPHER_API TypeUtilsBase
{
protected:
template<typename T, bool b>
static void do_zero_fill(T * buffer, framecnt_t frames, const boost::integral_constant<bool, b>&)
{ std::uninitialized_fill_n (buffer, frames, T()); }
template<typename T>
static void do_zero_fill(T * buffer, framecnt_t frames, const boost::true_type&)
{ memset (buffer, 0, frames * sizeof(T)); }
};
/// Utilities for initializing, copying, moving, etc. data
template<typename T = DefaultSampleType>
class /*LIBAUDIOGRAPHER_API*/ TypeUtils : private TypeUtilsBase
{
BOOST_STATIC_ASSERT (boost::has_trivial_destructor<T>::value);
typedef boost::integral_constant<bool,
boost::is_floating_point<T>::value ||
boost::is_signed<T>::value> zero_fillable;
public:
/** Fill buffer with a zero value
* The value used for filling is either 0 or the value of T()
* if T is not a floating point or signed integer type
* \n RT safe
*/
inline static void zero_fill (T * buffer, framecnt_t frames)
{ do_zero_fill(buffer, frames, zero_fillable()); }
/** Copies \a frames frames of data from \a source to \a destination
* The source and destination may NOT overlap.
* \n RT safe
*/
inline static void copy (T const * source, T * destination, framecnt_t frames)
{ std::uninitialized_copy (source, &source[frames], destination); }
/** Moves \a frames frames of data from \a source to \a destination
* The source and destination may overlap in any way.
* \n RT safe
*/
inline static void move (T const * source, T * destination, framecnt_t frames)
{
if (destination < source) {
std::copy (source, &source[frames], destination);
} else if (destination > source) {
std::copy_backward (source, &source[frames], destination + frames);
}
}
};
} // namespace
#endif // AUDIOGRAPHER_TYPE_UTILS_H
|
