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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
Copyright (C) 2006 Paul Davis
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_buffer_h__
#define __ardour_buffer_h__
#define _XOPEN_SOURCE 600
#include <cstdlib> // for posix_memalign
#include <cassert>
#include <ardour/types.h>
#include <ardour/data_type.h>
namespace ARDOUR {
/* Yes, this is a bit of a mess right now. I'll clean it up when everything
* using it works out.. */
/** A buffer of recordable/playable data.
*
* This is a datatype-agnostic base class for all buffers (there are no
* methods to actually access the data). This provides a way for code that
* doesn't care about the data type to still deal with buffers (which is
* why the base class can't be a template).
*
* To actually read/write buffer contents, use the appropriate derived class.
*/
class Buffer
{
public:
Buffer(DataType type, size_t capacity)
: _type(type), _capacity(capacity), _size(0)
{}
virtual ~Buffer() {}
/** Maximum capacity of buffer.
* Note in some cases the entire buffer may not contain valid data, use size. */
size_t capacity() const { return _capacity; }
/** Amount of valid data in buffer. Use this over capacity almost always. */
size_t size() const { return _size; }
/** Type of this buffer.
* Based on this you can static cast a Buffer* to the desired type. */
DataType type() const { return _type; }
protected:
DataType _type;
size_t _capacity;
size_t _size;
};
/* Inside every class with a type in it's name is a template waiting to get out... */
/** Buffer containing 32-bit floating point (audio) data. */
class AudioBuffer : public Buffer
{
public:
AudioBuffer(size_t capacity)
: Buffer(DataType::AUDIO, capacity)
, _data(NULL)
{
_size = capacity; // For audio buffers, size = capacity (always)
#ifdef NO_POSIX_MEMALIGN
_data = (Sample *) malloc(sizeof(Sample) * capacity);
#else
posix_memalign((void**)_data, 16, sizeof(Sample) * capacity);
#endif
assert(_data);
memset(_data, 0, sizeof(Sample) * capacity);
}
const Sample* data() const { return _data; }
Sample* data() { return _data; }
private:
// These are undefined (prevent copies)
AudioBuffer(const AudioBuffer& copy);
AudioBuffer& operator=(const AudioBuffer& copy);
Sample* _data; ///< Actual buffer contents
};
/** Buffer containing 8-bit unsigned char (MIDI) data. */
class MidiBuffer : public Buffer
{
public:
MidiBuffer(size_t capacity)
: Buffer(DataType::MIDI, capacity)
, _data(NULL)
{
_size = capacity; // For audio buffers, size = capacity (always)
#ifdef NO_POSIX_MEMALIGN
_data = (RawMidi *) malloc(sizeof(RawMidi) * capacity);
#else
posix_memalign((void**)_data, 16, sizeof(RawMidi) * capacity);
#endif
assert(_data);
memset(_data, 0, sizeof(RawMidi) * capacity);
}
const RawMidi* data() const { return _data; }
RawMidi* data() { return _data; }
private:
// These are undefined (prevent copies)
MidiBuffer(const MidiBuffer& copy);
MidiBuffer& operator=(const MidiBuffer& copy);
RawMidi* _data; ///< Actual buffer contents
};
} // namespace ARDOUR
#endif // __ardour_buffer_h__
|
