2 Copyright (C) 2006 Paul Davis
3 Written by Dave Robillard, 2006
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.
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.
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.
28 #include <pbd/mountpoint.h>
29 #include <pbd/pathscanner.h>
30 #include <pbd/stl_delete.h>
31 #include <pbd/strsplit.h>
33 #include <glibmm/miscutils.h>
35 #include <ardour/smf_source.h>
36 #include <ardour/session.h>
37 #include <ardour/midi_ring_buffer.h>
38 #include <ardour/midi_util.h>
39 #include <ardour/tempo.h>
40 #include <ardour/audioengine.h>
44 using namespace ARDOUR;
46 string SMFSource::_search_path;
48 /*sigc::signal<void,struct tm*, time_t> SMFSource::HeaderPositionOffsetChanged;
49 bool SMFSource::header_position_negative;
50 uint64_t SMFSource::header_position_offset;
53 SMFSource::SMFSource (Session& s, std::string path, Flag flags)
54 : MidiSource (s, region_name_from_path(path, false))
56 , _flags (Flag(flags | Writable)) // FIXME: this needs to be writable for now
57 , _allow_remove_if_empty(true)
58 , _timeline_position (0)
61 , _track_size(4) // 4 bytes for the ever-present EOT event
64 /* constructor used for new internal-to-session files. file cannot exist */
66 if (init (path, false)) {
67 throw failed_constructor ();
71 throw failed_constructor ();
74 assert(_name.find("/") == string::npos);
77 SMFSource::SMFSource (Session& s, const XMLNode& node)
78 : MidiSource (s, node)
80 , _flags (Flag (Writable|CanRename))
81 , _allow_remove_if_empty(true)
82 , _timeline_position (0)
85 , _track_size(4) // 4 bytes for the ever-present EOT event
88 /* constructor used for existing internal-to-session files. file must exist */
90 if (set_state (node)) {
91 throw failed_constructor ();
94 if (init (_name, true)) {
95 throw failed_constructor ();
99 throw failed_constructor ();
102 assert(_name.find("/") == string::npos);
105 SMFSource::~SMFSource ()
108 unlink (_path.c_str());
113 SMFSource::removable () const
115 return (_flags & Removable) && ((_flags & RemoveAtDestroy) ||
116 ((_flags & RemovableIfEmpty) && is_empty (_path)));
120 SMFSource::init (string pathstr, bool must_exist)
124 if (!find (pathstr, must_exist, is_new)) {
125 cerr << "cannot find " << pathstr << " with me = " << must_exist << endl;
129 if (is_new && must_exist) {
133 assert(_name.find("/") == string::npos);
140 cerr << "Opening SMF file " << path() << " writeable: " << writable() << endl;
142 assert(writable()); // FIXME;
144 _fd = fopen(path().c_str(), "r+");
146 // File already exists
148 fseek(_fd, _header_size - 4, 0);
149 uint32_t track_size_be = 0;
150 fread(&track_size_be, 4, 1, _fd);
151 _track_size = GUINT32_FROM_BE(track_size_be);
152 cerr << "SMF - read track size " << _track_size << endl;
154 // We're making a new file
156 _fd = fopen(path().c_str(), "w+");
159 // write a tentative header just to pad things out so writing happens in the right spot
161 // FIXME: write the footer here too so it's a valid SMF (screw up writing ATM though)
164 return (_fd == 0) ? -1 : 0;
168 SMFSource::update_header (nframes_t when, struct tm&, time_t)
170 _timeline_position = when;
171 return flush_header();
175 SMFSource::flush_header ()
177 // FIXME: write timeline position somehow?
179 cerr << "SMF Flushing header\n";
183 const uint16_t type = GUINT16_TO_BE(0); // SMF Type 0 (single track)
184 const uint16_t ntracks = GUINT16_TO_BE(1); // Number of tracks (always 1 for Type 0)
185 const uint16_t division = GUINT16_TO_BE(_ppqn); // Pulses per beat
188 memcpy(data, &type, 2);
189 memcpy(data+2, &ntracks, 2);
190 memcpy(data+4, &division, 2);
192 _fd = freopen(path().c_str(), "r+", _fd);
195 write_chunk("MThd", 6, data);
196 //if (_track_size > 0) {
197 write_chunk_header("MTrk", _track_size);
206 SMFSource::flush_footer()
208 cerr << "SMF - Writing EOT\n";
210 fseek(_fd, 0, SEEK_END);
211 write_var_len(1); // whatever...
212 char eot[4] = { 0xFF, 0x2F, 0x00 }; // end-of-track meta-event
213 fwrite(eot, 1, 4, _fd);
218 /** Returns the offset of the first event in the file with a time past @a start,
219 * relative to the start of the source.
221 * Returns -1 if not found.
225 SMFSource::find_first_event_after(nframes_t start)
227 // FIXME: obviously this is slooow
229 fseek(_fd, _header_size, 0);
231 while ( ! feof(_fd) ) {
232 const uint32_t delta_time = read_var_len();
234 if (delta_time > start)
242 /** Read an event from the current position in file.
244 * File position MUST be at the beginning of a delta time, or this will die very messily.
245 * ev.buffer must be of size ev.size, and large enough for the event. The returned event
246 * will have it's time field set to it's delta time, in SMF tempo-based ticks, using the
247 * rate given by ppqn() (it is the caller's responsibility to calculate a real time).
249 * Returns event length (including status byte) on success, 0 if event was
250 * skipped (eg a meta event), or -1 on EOF (or end of track).
253 SMFSource::read_event(MidiEvent& ev) const
255 // - 4 is for the EOT event, which we don't actually want to read
256 //if (feof(_fd) || ftell(_fd) >= _header_size + _track_size - 4) {
261 uint32_t delta_time = read_var_len();
263 int status = fgetc(_fd);
264 assert(status != EOF); // FIXME die gracefully
265 if (status == 0xFF) {
267 int type = fgetc(_fd);
268 if ((unsigned char)type == 0x2F) {
269 //cerr << "SMF - hit EOT" << endl;
270 return -1; // we hit the logical EOF anyway...
273 ev.time = delta_time; // this is needed regardless
278 ev.time = delta_time;
279 ev.size = midi_event_size((unsigned char)status) + 1;
281 if (ev.buffer == NULL)
282 ev.buffer = (Byte*)malloc(sizeof(Byte) * ev.size);
284 ev.buffer[0] = (unsigned char)status;
285 fread(ev.buffer+1, 1, ev.size - 1, _fd);
287 /*printf("SMF - read event, delta = %u, size = %zu, data = ",
288 delta_time, ev.size);
289 for (size_t i=0; i < ev.size; ++i) {
290 printf("%X ", ev.buffer[i]);
297 /** All stamps in audio frames */
299 SMFSource::read_unlocked (MidiRingBuffer& dst, nframes_t start, nframes_t cnt, nframes_t stamp_offset) const
301 //cerr << "SMF - read " << start << ", count=" << cnt << ", offset=" << stamp_offset << endl;
303 // 64 bits ought to be enough for anybody
304 uint64_t time = 0; // in SMF ticks, 1 tick per _ppqn
306 _read_data_count = 0;
309 unsigned char ev_buf[MidiBuffer::max_event_size()];
312 ev.size = MidiBuffer::max_event_size();
315 // FIXME: it would be an impressive feat to actually make this any slower :)
317 fseek(_fd, _header_size, 0);
319 // FIXME: assumes tempo never changes after start
320 const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
321 _session.engine().frame_rate());
323 uint64_t start_ticks = (uint64_t)((start / frames_per_beat) * _ppqn);
326 int ret = read_event(ev);
327 if (ret == -1) { // EOF
328 //cerr << "SMF - EOF\n";
332 if (ret == 0) { // meta-event (skipped)
333 //cerr << "SMF - META\n";
334 time += ev.time; // just accumulate delta time and ignore event
338 time += ev.time; // accumulate delta time
339 ev.time = time; // set ev.time to actual time (relative to source start)
341 if (ev.time >= start_ticks) {
342 if (ev.time < start_ticks + (cnt / frames_per_beat)) {
345 ev.time = (nframes_t)(((ev.time / (double)_ppqn) * frames_per_beat)) + stamp_offset;
346 // write event time in absolute frames
347 dst.write(ev.time, ev.size, ev.buffer);
351 _read_data_count += ev.size;
357 /** All stamps in audio frames */
359 SMFSource::write_unlocked (MidiRingBuffer& src, nframes_t cnt)
361 _write_data_count = 0;
363 boost::shared_ptr<MidiBuffer> buf_ptr(new MidiBuffer(1024)); // FIXME: size?
364 MidiBuffer& buf = *buf_ptr.get();
365 src.read(buf, /*_length*/0, _length + cnt); // FIXME?
367 fseek(_fd, 0, SEEK_END);
369 // FIXME: assumes tempo never changes after start
370 const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
371 _session.engine().frame_rate());
373 for (size_t i=0; i < buf.size(); ++i) {
374 MidiEvent& ev = buf[i];
375 assert(ev.time >= _timeline_position);
376 ev.time -= _timeline_position;
377 assert(ev.time >= _last_ev_time);
378 const uint32_t delta_time = (uint32_t)((ev.time - _last_ev_time) / frames_per_beat * _ppqn);
380 /*printf("SMF - writing event, delta = %u, size = %zu, data = ",
381 delta_time, ev.size);
382 for (size_t i=0; i < ev.size; ++i) {
383 printf("%X ", ev.buffer[i]);
387 size_t stamp_size = write_var_len(delta_time);
388 fwrite(ev.buffer, 1, ev.size, _fd);
390 _track_size += stamp_size + ev.size;
391 _write_data_count += ev.size;
393 _last_ev_time = ev.time;
398 const nframes_t oldlen = _length;
399 update_length(oldlen, cnt);
403 ViewDataRangeReady (buf_ptr, oldlen, cnt); /* EMIT SIGNAL */
409 SMFSource::get_state ()
411 XMLNode& root (MidiSource::get_state());
413 snprintf (buf, sizeof (buf), "0x%x", (int)_flags);
414 root.add_property ("flags", buf);
419 SMFSource::set_state (const XMLNode& node)
421 const XMLProperty* prop;
423 if (MidiSource::set_state (node)) {
427 if ((prop = node.property (X_("flags"))) != 0) {
430 sscanf (prop->value().c_str(), "0x%x", &ival);
431 _flags = Flag (ival);
439 assert(_name.find("/") == string::npos);
445 SMFSource::mark_for_remove ()
450 _flags = Flag (_flags | RemoveAtDestroy);
454 SMFSource::mark_streaming_write_completed ()
463 Glib::Mutex::Lock lm (_lock);
466 next_peak_clear_should_notify = true;
468 if (_peaks_built || pending_peak_builds.empty()) {
470 PeaksReady (); /* EMIT SIGNAL */
476 SMFSource::mark_take (string id)
484 SMFSource::move_to_trash (const string trash_dir_name)
492 /* don't move the file across filesystems, just
493 stick it in the 'trash_dir_name' directory
494 on whichever filesystem it was already on.
497 newpath = Glib::path_get_dirname (_path);
498 newpath = Glib::path_get_dirname (newpath);
501 newpath += trash_dir_name;
503 newpath += Glib::path_get_basename (_path);
505 if (access (newpath.c_str(), F_OK) == 0) {
507 /* the new path already exists, try versioning */
509 char buf[PATH_MAX+1];
513 snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), version);
516 while (access (newpath_v.c_str(), F_OK) == 0 && version < 999) {
517 snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), ++version);
521 if (version == 999) {
522 PBD::error << string_compose (_("there are already 1000 files with names like %1; versioning discontinued"),
531 /* it doesn't exist, or we can't read it or something */
535 if (::rename (_path.c_str(), newpath.c_str()) != 0) {
536 PBD::error << string_compose (_("cannot rename midi file source from %1 to %2 (%3)"),
537 _path, newpath, strerror (errno))
542 if (::unlink (peakpath.c_str()) != 0) {
543 PBD::error << string_compose (_("cannot remove peakfile %1 for %2 (%3)"),
544 peakpath, _path, strerror (errno))
546 /* try to back out */
547 rename (newpath.c_str(), _path.c_str());
554 /* file can not be removed twice, since the operation is not idempotent */
556 _flags = Flag (_flags & ~(RemoveAtDestroy|Removable|RemovableIfEmpty));
561 // FIXME: Merge this with audiofilesource somehow (make a generic filesource?)
563 SMFSource::find (string pathstr, bool must_exist, bool& isnew)
565 string::size_type pos;
570 /* clean up PATH:CHANNEL notation so that we are looking for the correct path */
572 if ((pos = pathstr.find_last_of (':')) == string::npos) {
575 pathstr = pathstr.substr (0, pos);
578 if (pathstr[0] != '/') {
580 /* non-absolute pathname: find pathstr in search path */
587 if (_search_path.length() == 0) {
588 PBD::error << _("FileSource: search path not set") << endmsg;
592 split (_search_path, dirs, ':');
596 for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
599 if (fullpath[fullpath.length()-1] != '/') {
604 if (access (fullpath.c_str(), R_OK) == 0) {
612 PBD::error << string_compose (_("FileSource: \"%1\" is ambigous when searching %2\n\t"), pathstr, _search_path) << endmsg;
615 } else if (cnt == 0) {
618 PBD::error << string_compose(_("Filesource: cannot find required file (%1): while searching %2"), pathstr, _search_path) << endmsg;
631 /* external files and/or very very old style sessions include full paths */
634 _name = pathstr.substr (pathstr.find_last_of ('/') + 1);
636 if (access (_path.c_str(), R_OK) != 0) {
638 /* file does not exist or we cannot read it */
641 PBD::error << string_compose(_("Filesource: cannot find required file (%1): %2"), _path, strerror (errno)) << endmsg;
645 if (errno != ENOENT) {
646 PBD::error << string_compose(_("Filesource: cannot check for existing file (%1): %2"), _path, strerror (errno)) << endmsg;
668 SMFSource::set_search_path (string p)
675 SMFSource::set_allow_remove_if_empty (bool yn)
678 _allow_remove_if_empty = yn;
683 SMFSource::set_name (string newname, bool destructive)
685 //Glib::Mutex::Lock lm (_lock); FIXME
686 string oldpath = _path;
687 string newpath = Session::change_midi_path_by_name (oldpath, _name, newname, destructive);
689 if (newpath.empty()) {
690 PBD::error << string_compose (_("programming error: %1"), "cannot generate a changed midi path") << endmsg;
694 if (rename (oldpath.c_str(), newpath.c_str()) != 0) {
695 PBD::error << string_compose (_("cannot rename midi file for %1 to %2"), _name, newpath) << endmsg;
699 _name = Glib::path_get_basename (newpath);
702 return 0;//rename_peakfile (peak_path (_path));
706 SMFSource::is_empty (string path)
715 SMFSource::write_chunk_header(char id[4], uint32_t length)
717 const uint32_t length_be = GUINT32_TO_BE(length);
719 fwrite(id, 1, 4, _fd);
720 fwrite(&length_be, 4, 1, _fd);
724 SMFSource::write_chunk(char id[4], uint32_t length, void* data)
726 write_chunk_header(id, length);
728 fwrite(data, 1, length, _fd);
731 /** Returns the size (in bytes) of the value written. */
733 SMFSource::write_var_len(uint32_t value)
737 uint32_t buffer = value & 0x7F;
739 while ( (value >>= 7) ) {
741 buffer |= ((value & 0x7F) | 0x80);
745 //printf("Writing var len byte %X\n", (unsigned char)buffer);
758 SMFSource::read_var_len() const
762 //int offset = ftell(_fd);
763 //cerr << "SMF - reading var len at " << offset << endl;
768 if ( (value = getc(_fd)) & 0x80 ) {
772 value = (value << 7) + ((c = getc(_fd)) & 0x7F);
780 SMFSource::load_model(bool lock)
783 Glib::Mutex::Lock lm (_lock);
786 _model = new MidiModel();
788 fseek(_fd, _header_size, 0);
793 // FIXME: assumes tempo never changes after start
794 const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
795 _session.engine().frame_rate());
798 while ((ret = read_event(ev)) >= 0) {
802 ev.time = (nframes_t)(ev.time * frames_per_beat / (double)_ppqn);
804 if (ret > 0) { // didn't skip (meta) event
805 //cerr << "ADDING EVENT TO MODEL: " << ev.time << endl;
813 SMFSource::destroy_model()