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 LIBARDOUR_API 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);
52 bool merge_in_place(const MidiBuffer &other);
54 template<typename BufferType, typename EventType>
57 iterator_base<BufferType, EventType>(BufferType& b, framecnt_t o)
58 : buffer(&b), offset(o) {}
59 iterator_base<BufferType, EventType>(const iterator_base<BufferType,EventType>& o)
60 : buffer (o.buffer), offset(o.offset) {}
62 inline iterator_base<BufferType,EventType> operator= (const iterator_base<BufferType,EventType>& o) {
70 inline EventType operator*() const {
71 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
72 int event_size = Evoral::midi_event_size(ev_start);
73 assert(event_size >= 0);
74 return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
75 *((TimeType*)(buffer->_data + offset)),
76 event_size, ev_start);
78 inline EventType operator*() {
79 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
80 int event_size = Evoral::midi_event_size(ev_start);
81 assert(event_size >= 0);
82 return EventType(EventTypeMap::instance().midi_event_type(*ev_start),
83 *((TimeType*)(buffer->_data + offset)),
84 event_size, ev_start);
87 inline iterator_base<BufferType, EventType>& operator++() {
88 uint8_t* ev_start = buffer->_data + offset + sizeof(TimeType);
89 int event_size = Evoral::midi_event_size(ev_start);
90 assert(event_size >= 0);
91 offset += sizeof(TimeType) + event_size;
94 inline bool operator!=(const iterator_base<BufferType, EventType>& other) const {
95 return (buffer != other.buffer) || (offset != other.offset);
97 inline bool operator==(const iterator_base<BufferType, EventType>& other) const {
98 return (buffer == other.buffer) && (offset == other.offset);
104 typedef iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> > iterator;
105 typedef iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> > const_iterator;
107 iterator begin() { return iterator(*this, 0); }
108 iterator end() { return iterator(*this, _size); }
110 const_iterator begin() const { return const_iterator(*this, 0); }
111 const_iterator end() const { return const_iterator(*this, _size); }
113 iterator erase(const iterator& i) {
114 assert (i.buffer == this);
115 uint8_t* ev_start = _data + i.offset + sizeof (TimeType);
116 int event_size = Evoral::midi_event_size (ev_start);
118 if (event_size < 0) {
119 /* unknown size, sysex: return end() */
123 size_t total_data_deleted = sizeof(TimeType) + event_size;
125 if (i.offset + total_data_deleted >= _size) {
130 /* we need to avoid the temporary malloc that memmove would do,
131 so copy by hand. remember: this is small amounts of data ...
134 for (a = i.offset, b = i.offset + total_data_deleted; b < _size; ++b, ++a) {
138 _size -= total_data_deleted;
140 /* all subsequent iterators are now invalid, and the one we
141 * return should refer to the event we copied, which was after
142 * the one we just erased.
145 return iterator (*this, i.offset);
148 uint8_t* data() const { return _data; }
151 * returns true if the message with the second argument as its MIDI
152 * status byte should preceed the message with the first argument as
153 * its MIDI status byte.
155 static bool second_simultaneous_midi_byte_is_first (uint8_t, uint8_t);
158 friend class iterator_base< MidiBuffer, Evoral::MIDIEvent<TimeType> >;
159 friend class iterator_base< const MidiBuffer, const Evoral::MIDIEvent<TimeType> >;
161 uint8_t* _data; ///< timestamp, event, timestamp, event, ...
165 } // namespace ARDOUR
167 #endif // __ardour_midi_buffer_h__