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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
Copyright (C) 2006-2009 Paul Davis
Author: David Robillard
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_midi_buffer_h__
#define __ardour_midi_buffer_h__
#include "evoral/midi_util.h"
#include "midi++/event.h"
#include "ardour/buffer.h"
#include "ardour/event_type_map.h"
namespace ARDOUR {
/** Buffer containing 8-bit unsigned char (MIDI) data. */
class MidiBuffer : public Buffer
{
public:
typedef framepos_t TimeType;
MidiBuffer(size_t capacity);
~MidiBuffer();
void silence (framecnt_t nframes, framecnt_t offset = 0);
void read_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset = 0, framecnt_t src_offset = 0);
void merge_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset = 0, framecnt_t src_offset = 0);
void copy(const MidiBuffer& copy);
bool push_back(const Evoral::MIDIEvent<TimeType>& event);
bool push_back(const jack_midi_event_t& event);
bool push_back(TimeType time, size_t size, const uint8_t* data);
uint8_t* reserve(TimeType time, size_t size);
void resize(size_t);
bool merge_in_place(const MidiBuffer &other);
template<typename BufferType, typename EventType>
class iterator_base {
public:
iterator_base<BufferType, EventType>(BufferType& b, framecnt_t o)
: buffer(&b), offset(o) {}
iterator_base<BufferType, EventType>(const iterator_base<BufferType,EventType>& o)
: buffer (o.buffer), offset(o.offset) {}
inline iterator_base<BufferType,EventType> operator= (const iterator_base<BufferType,EventType>& o) {
if (&o != this) {
buffer = o.buffer;
offset = o.offset;
}
return *this;
}
inline EventType operator*() const {
uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
int event_size = Evoral::midi_event_size(ev_start);
assert(event_size >= 0);
return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
*((TimeType*)(buffer->_data + offset)),
event_size, ev_start);
}
inline EventType operator*() {
uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
int event_size = Evoral::midi_event_size(ev_start);
assert(event_size >= 0);
return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
*((TimeType*)(buffer->_data + offset)),
event_size, ev_start);
}
inline iterator_base<BufferType, EventType>& operator++() {
uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
int event_size = Evoral::midi_event_size(ev_start);
assert(event_size >= 0);
offset += sizeof(TimeType) + event_size;
return *this;
}
inline bool operator!=(const iterator_base<BufferType, EventType>& other) const {
return (buffer != other.buffer) || (offset != other.offset);
}
inline bool operator==(const iterator_base<BufferType, EventType>& other) const {
return (buffer == other.buffer) && (offset == other.offset);
}
BufferType* buffer;
size_t offset;
};
typedef iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> > iterator;
typedef iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> > const_iterator;
iterator begin() { return iterator(*this, 0); }
iterator end() { return iterator(*this, _size); }
const_iterator begin() const { return const_iterator(*this, 0); }
const_iterator end() const { return const_iterator(*this, _size); }
iterator erase(const iterator& i) {
assert (i.buffer == this);
uint8_t* ev_start = _data + i.offset + sizeof (TimeType);
int event_size = Evoral::midi_event_size (ev_start);
if (event_size < 0) {
/* unknown size, sysex: return end() */
return end();
}
size_t total_data_deleted = sizeof(TimeType) + event_size;
if (i.offset + total_data_deleted >= _size) {
_size = 0;
return end();
}
/* we need to avoid the temporary malloc that memmove would do,
so copy by hand. remember: this is small amounts of data ...
*/
size_t a, b;
for (a = i.offset, b = i.offset + total_data_deleted; b < _size; ++b, ++a) {
_data[a] = _data[b];
}
_size -= total_data_deleted;
/* all subsequent iterators are now invalid, and the one we
* return should refer to the event we copied, which was after
* the one we just erased.
*/
return iterator (*this, i.offset);
}
uint8_t* data() const { return _data; }
/**
* returns true if the message with the second argument as its MIDI
* status byte should preceed the message with the first argument as
* its MIDI status byte.
*/
static bool second_simultaneous_midi_byte_is_first (uint8_t, uint8_t);
private:
friend class iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> >;
friend class iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> >;
uint8_t* _data; ///< timestamp, event, timestamp, event, ...
};
} // namespace ARDOUR
#endif // __ardour_midi_buffer_h__
|
