2 Copyright (C) 2006-2009 Paul Davis
3 Author: David Robillard
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the Free
7 Software Foundation; either version 2 of the License, or (at your option)
10 This program is distributed in the hope that it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_midi_buffer_h__
21 #define __ardour_midi_buffer_h__
23 #include "evoral/midi_util.h"
24 #include "midi++/event.h"
25 #include "ardour/buffer.h"
26 #include "ardour/event_type_map.h"
31 /** Buffer containing 8-bit unsigned char (MIDI) data. */
32 class MidiBuffer : public Buffer
35 typedef framepos_t TimeType;
37 MidiBuffer(size_t capacity);
40 void silence (framecnt_t nframes, framecnt_t offset = 0);
41 void read_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset = 0, framecnt_t src_offset = 0);
42 void merge_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset = 0, framecnt_t src_offset = 0);
44 void copy(const MidiBuffer& copy);
46 bool push_back(const Evoral::MIDIEvent<TimeType>& event);
47 bool push_back(TimeType time, size_t size, const uint8_t* data);
48 uint8_t* reserve(TimeType time, size_t size);
51 size_t size() const { return _size; }
52 bool empty() const { return _size == 0; }
54 bool merge_in_place(const MidiBuffer &other);
56 template<typename BufferType, typename EventType>
59 iterator_base<BufferType, EventType>(BufferType& b, framecnt_t o)
60 : buffer(&b), offset(o) {}
61 iterator_base<BufferType, EventType>(const iterator_base<BufferType,EventType>& o)
62 : buffer (o.buffer), offset(o.offset) {}
64 inline iterator_base<BufferType,EventType> operator= (const iterator_base<BufferType,EventType>& o) {
72 inline EventType operator*() const {
73 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
74 int event_size = Evoral::midi_event_size(ev_start);
75 assert(event_size >= 0);
76 return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
77 *((TimeType*)(buffer->_data + offset)),
78 event_size, ev_start);
80 inline EventType operator*() {
81 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
82 int event_size = Evoral::midi_event_size(ev_start);
83 assert(event_size >= 0);
84 return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
85 *((TimeType*)(buffer->_data + offset)),
86 event_size, ev_start);
89 inline iterator_base<BufferType, EventType>& operator++() {
90 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
91 int event_size = Evoral::midi_event_size(ev_start);
92 assert(event_size >= 0);
93 offset += sizeof(TimeType) + event_size;
96 inline bool operator!=(const iterator_base<BufferType, EventType>& other) const {
97 return (buffer != other.buffer) || (offset != other.offset);
99 inline bool operator==(const iterator_base<BufferType, EventType>& other) const {
100 return (buffer == other.buffer) && (offset == other.offset);
106 typedef iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> > iterator;
107 typedef iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> > const_iterator;
109 iterator begin() { return iterator(*this, 0); }
110 iterator end() { return iterator(*this, _size); }
112 const_iterator begin() const { return const_iterator(*this, 0); }
113 const_iterator end() const { return const_iterator(*this, _size); }
115 iterator erase(const iterator& i) {
116 assert (i.buffer == this);
117 uint8_t* ev_start = _data + i.offset + sizeof (TimeType);
118 int event_size = Evoral::midi_event_size (ev_start);
120 if (event_size < 0) {
121 /* unknown size, sysex: return end() */
125 size_t total_data_deleted = sizeof(TimeType) + event_size;
127 if (i.offset + total_data_deleted >= _size) {
132 /* we need to avoid the temporary malloc that memmove would do,
133 so copy by hand. remember: this is small amounts of data ...
136 for (a = i.offset, b = i.offset + total_data_deleted; b < _size; ++b, ++a) {
140 _size -= total_data_deleted;
142 /* all subsequent iterators are now invalid, and the one we
143 * return should refer to the event we copied, which was after
144 * the one we just erased.
147 return iterator (*this, i.offset);
150 uint8_t* data() const { return _data; }
153 * returns true if the message with the second argument as its MIDI
154 * status byte should preceed the message with the first argument as
155 * its MIDI status byte.
157 static bool second_simultaneous_midi_byte_is_first (uint8_t, uint8_t);
160 friend class iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> >;
161 friend class iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> >;
163 uint8_t* _data; ///< timestamp, event, timestamp, event, ...
168 } // namespace ARDOUR
170 #endif // __ardour_midi_buffer_h__