2 Copyright (C) 2000-2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 $Id: midiregion.cc 746 2006-08-02 02:44:23Z drobilla $
27 #include <sigc++/bind.h>
28 #include <sigc++/class_slot.h>
30 #include <glibmm/thread.h>
32 #include <pbd/basename.h>
33 #include <pbd/xml++.h>
34 #include <pbd/enumwriter.h>
36 #include <ardour/midi_region.h>
37 #include <ardour/session.h>
38 #include <ardour/gain.h>
39 #include <ardour/dB.h>
40 #include <ardour/playlist.h>
41 #include <ardour/midi_source.h>
42 #include <ardour/types.h>
43 #include <ardour/midi_ring_buffer.h>
49 using namespace ARDOUR;
51 /** Basic MidiRegion constructor (one channel) */
52 MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length)
53 : Region (src, start, length, PBD::basename_nosuffix(src->name()), DataType::MIDI, 0, Region::Flag(Region::DefaultFlags|Region::External))
55 assert(_name.find("/") == string::npos);
58 /* Basic MidiRegion constructor (one channel) */
59 MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
60 : Region (src, start, length, name, DataType::MIDI, layer, flags)
62 assert(_name.find("/") == string::npos);
65 /* Basic MidiRegion constructor (many channels) */
66 MidiRegion::MidiRegion (SourceList& srcs, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
67 : Region (srcs, start, length, name, DataType::MIDI, layer, flags)
69 assert(_name.find("/") == string::npos);
73 /** Create a new MidiRegion, that is part of an existing one */
74 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, nframes_t offset, nframes_t length, const string& name, layer_t layer, Flag flags)
75 : Region (other, offset, length, name, layer, flags)
77 assert(_name.find("/") == string::npos);
80 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
83 assert(_name.find("/") == string::npos);
86 MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, const XMLNode& node)
89 if (set_state (node)) {
90 throw failed_constructor();
93 assert(_name.find("/") == string::npos);
94 assert(_type == DataType::MIDI);
97 MidiRegion::MidiRegion (SourceList& srcs, const XMLNode& node)
100 if (set_state (node)) {
101 throw failed_constructor();
104 assert(_name.find("/") == string::npos);
105 assert(_type == DataType::MIDI);
108 MidiRegion::~MidiRegion ()
113 MidiRegion::read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n) const
115 return _read_at (_sources, out, position, dur, chan_n);
119 MidiRegion::master_read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n) const
121 return _read_at (_master_sources, out, position, dur, chan_n);
125 MidiRegion::_read_at (const SourceList& srcs, MidiRingBuffer& dst, nframes_t position, nframes_t dur, uint32_t chan_n) const
127 // cerr << _name << "._read_at(" << position << ") - " << _position << endl;
129 nframes_t internal_offset = 0;
130 nframes_t src_offset = 0;
131 nframes_t to_read = 0;
133 /* precondition: caller has verified that we cover the desired section */
137 if (position < _position) {
139 src_offset = _position - position;
142 internal_offset = position - _position;
146 if (internal_offset >= _length) {
147 return 0; /* read nothing */
151 if ((to_read = min (dur, _length - internal_offset)) == 0) {
152 return 0; /* read nothing */
155 // FIXME: non-opaque MIDI regions not yet supported
159 return 0; /* read nothing */
162 _read_data_count = 0;
164 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
165 if (src->read (dst, _start + internal_offset, to_read, _position) != to_read) {
166 return 0; /* "read nothing" */
169 _read_data_count += src->read_data_count();
175 MidiRegion::state (bool full)
177 XMLNode& node (Region::state (full));
180 LocaleGuard lg (X_("POSIX"));
182 node.add_property ("flags", enum_2_string (_flags));
184 for (uint32_t n=0; n < _sources.size(); ++n) {
185 snprintf (buf2, sizeof(buf2), "source-%d", n);
186 _sources[n]->id().print (buf, sizeof(buf));
187 node.add_property (buf2, buf);
190 if (full && _extra_xml) {
191 node.add_child_copy (*_extra_xml);
198 MidiRegion::set_live_state (const XMLNode& node, Change& what_changed, bool send)
200 const XMLProperty *prop;
201 LocaleGuard lg (X_("POSIX"));
203 Region::set_live_state (node, what_changed, false);
205 uint32_t old_flags = _flags;
207 if ((prop = node.property ("flags")) != 0) {
208 _flags = Flag (string_2_enum (prop->value(), _flags));
210 //_flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
212 _flags = Flag (_flags & ~Region::LeftOfSplit);
213 _flags = Flag (_flags & ~Region::RightOfSplit);
216 if ((old_flags ^ _flags) & Muted) {
217 what_changed = Change (what_changed|MuteChanged);
219 if ((old_flags ^ _flags) & Opaque) {
220 what_changed = Change (what_changed|OpacityChanged);
222 if ((old_flags ^ _flags) & Locked) {
223 what_changed = Change (what_changed|LockChanged);
227 send_change (what_changed);
234 MidiRegion::set_state (const XMLNode& node)
236 /* Region::set_state() calls the virtual set_live_state(),
237 which will get us back to AudioRegion::set_live_state()
238 to handle the relevant stuff.
241 return Region::set_state (node);
245 MidiRegion::recompute_at_end ()
247 /* our length has changed
248 * (non destructively) "chop" notes that pass the end boundary, to
249 * prevent stuck notes.
254 MidiRegion::recompute_at_start ()
256 /* as above, but the shift was from the front
257 * maybe bump currently active note's note-ons up so they sound here?
258 * that could be undesireable in certain situations though.. maybe
259 * remove the note entirely, including it's note off? something needs to
260 * be done to keep the played MIDI sane to avoid messing up voices of
261 * polyhonic things etc........
266 MidiRegion::separate_by_channel (Session& session, vector<MidiRegion*>& v) const
268 // Separate by MIDI channel? bit different from audio since this is separating based
269 // on the actual contained data and destructively modifies and creates new sources..
275 for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
280 /* generate a new name */
282 if (session.region_name (new_name, _name)) {
286 /* create a copy with just one source */
288 v.push_back (new MidiRegion (srcs, _start, _length, new_name, _layer, _flags));
292 // Actually, I would prefer not if that's alright
296 boost::shared_ptr<MidiSource>
297 MidiRegion::midi_source (uint32_t n) const
299 // Guaranteed to succeed (use a static cast?)
300 return boost::dynamic_pointer_cast<MidiSource>(source(n));