libs/ardour/midi_source.cc

   1 /*
   2     Copyright (C) 2006 Paul Davis
   3         Written by Dave Robillard, 2006
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <sys/stat.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <poll.h>
  24 #include <float.h>
  25 #include <cerrno>
  26 #include <ctime>
  27 #include <cmath>
  28 #include <iomanip>
  29 #include <algorithm>
  30
  31 #include <pbd/xml++.h>
  32 #include <pbd/pthread_utils.h>
  33 #include <pbd/basename.h>
  34
  35 #include <ardour/audioengine.h>
  36 #include <ardour/midi_model.h>
  37 #include <ardour/midi_ring_buffer.h>
  38 #include <ardour/midi_source.h>
  39 #include <ardour/session.h>
  40 #include <ardour/session_directory.h>
  41 #include <ardour/source_factory.h>
  42 #include <ardour/tempo.h>
  43
  44 #include "i18n.h"
  45
  46 using namespace std;
  47 using namespace ARDOUR;
  48 using namespace PBD;
  49
  50 sigc::signal<void,MidiSource *> MidiSource::MidiSourceCreated;
  51
  52 MidiSource::MidiSource (Session& s, string name, Source::Flag flags)
  53         : Source (s, DataType::MIDI, name, flags)
  54         , _read_data_count(0)
  55         , _write_data_count(0)
  56         , _converter(s, _timeline_position)
  57         , _writing (false)
  58         , _last_read_end(0)
  59 {
  60 }
  61
  62 MidiSource::MidiSource (Session& s, const XMLNode& node)
  63         : Source (s, node)
  64         , _read_data_count(0)
  65         , _write_data_count(0)
  66         , _converter(s, _timeline_position)
  67         , _writing (false)
  68         , _last_read_end(0)
  69 {
  70         _read_data_count = 0;
  71         _write_data_count = 0;
  72
  73         if (set_state (node)) {
  74                 throw failed_constructor();
  75         }
  76 }
  77
  78 MidiSource::~MidiSource ()
  79 {
  80 }
  81
  82 XMLNode&
  83 MidiSource::get_state ()
  84 {
  85         XMLNode& node (Source::get_state());
  86
  87         if (_captured_for.length()) {
  88                 node.add_property ("captured-for", _captured_for);
  89         }
  90
  91         return node;
  92 }
  93
  94 int
  95 MidiSource::set_state (const XMLNode& node)
  96 {
  97         const XMLProperty* prop;
  98
  99         if ((prop = node.property ("captured-for")) != 0) {
 100                 _captured_for = prop->value();
 101         }
 102
 103         return 0;
 104 }
 105
 106 nframes_t
 107 MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, nframes_t start, nframes_t cnt,
 108                 nframes_t stamp_offset, nframes_t negative_stamp_offset) const
 109 {
 110
 111         Glib::Mutex::Lock lm (_lock);
 112         if (_model) {
 113 #define BEATS_TO_FRAMES(t) (_converter.to(t) + stamp_offset - negative_stamp_offset)
 114
 115                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 116
 117                 if (_last_read_end == 0 || start != _last_read_end) {
 118                         cerr << "MidiSource::midi_read seeking to frame " << start << endl;
 119                         for (i = _model->begin(); i != _model->end(); ++i) {
 120                                 if (BEATS_TO_FRAMES(i->time()) >= start) {
 121                                         break;
 122                                 }
 123                         }
 124                 }
 125
 126                 _last_read_end = start + cnt;
 127
 128                 for (; i != _model->end(); ++i) {
 129                         const nframes_t time_frames = BEATS_TO_FRAMES(i->time());
 130                         if (time_frames < start + cnt) {
 131                                 dst.write(time_frames, i->event_type(), i->size(), i->buffer());
 132                         } else {
 133                                 break;
 134                         }
 135                 }
 136                 return cnt;
 137         } else {
 138                 return read_unlocked (dst, start, cnt, stamp_offset, negative_stamp_offset);
 139         }
 140 }
 141
 142 nframes_t
 143 MidiSource::midi_write (MidiRingBuffer<nframes_t>& dst, nframes_t cnt)
 144 {
 145         Glib::Mutex::Lock lm (_lock);
 146         return write_unlocked (dst, cnt);
 147 }
 148
 149 bool
 150 MidiSource::file_changed (string path)
 151 {
 152         struct stat stat_file;
 153
 154         int e1 = stat (path.c_str(), &stat_file);
 155
 156         return !e1;
 157 }
 158
 159 void
 160 MidiSource::set_timeline_position (int64_t pos)
 161 {
 162         Source::set_timeline_position(pos);
 163         _converter.set_origin(pos);
 164 }
 165
 166 void
 167 MidiSource::mark_streaming_midi_write_started (NoteMode mode, nframes_t start_frame)
 168 {
 169         set_timeline_position(start_frame); // why do I have a feeling this can break somehow...
 170
 171         if (_model) {
 172                 _model->set_note_mode(mode);
 173                 _model->start_write();
 174         }
 175
 176         _writing = true;
 177 }
 178
 179 void
 180 MidiSource::mark_streaming_write_started ()
 181 {
 182         if (_model) {
 183                 _model->start_write();
 184         }
 185
 186         _writing = true;
 187 }
 188
 189 void
 190 MidiSource::mark_streaming_write_completed ()
 191 {
 192         if (_model) {
 193                 _model->end_write(false); // FIXME: param?
 194         }
 195
 196         _writing = false;
 197 }
 198
 199 void
 200 MidiSource::session_saved()
 201 {
 202         flush_midi();
 203
 204         if (_model && _model->edited()) {
 205                 string newname;
 206                 const string basename = PBD::basename_nosuffix(_name);
 207                 string::size_type last_dash = basename.find_last_of("-");
 208                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 209                         newname = basename + "-1";
 210                 } else {
 211                         stringstream ss(basename.substr(last_dash+1));
 212                         unsigned write_count = 0;
 213                         ss >> write_count;
 214                         cerr << "WRITE COUNT: " << write_count << endl;
 215                         ++write_count; // start at 1
 216                         ss.clear();
 217                         ss << basename.substr(0, last_dash) << "-" << write_count;
 218                         newname = ss.str();
 219                 }
 220
 221                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 222
 223                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 224                                 SourceFactory::createWritable(DataType::MIDI, _session,
 225                                                 newpath, true, false, _session.frame_rate()));
 226
 227                 newsrc->set_timeline_position(_timeline_position);
 228                 _model->write_to(newsrc);
 229
 230                 // cyclic dependency here, ugly :(
 231                 newsrc->set_model(_model);
 232                 _model->set_midi_source(newsrc.get());
 233
 234                 newsrc->flush_midi();
 235
 236                 Switched.emit(newsrc);
 237         }
 238 }
 239
 240 void
 241 MidiSource::set_note_mode(NoteMode mode)
 242 {
 243         if (_model) {
 244                 _model->set_note_mode(mode);
 245         }
 246 }
 247