1 /* This file is part of Evoral.
2 * Copyright (C) 2008 David Robillard <http://drobilla.net>
3 * Copyright (C) 2000-2008 Paul Davis
6 * Evoral is free software; you can redistribute it and/or modify it under the
7 * terms of the GNU General Public License as published by the Free Software
8 * Foundation; either version 2 of the License, or (at your option) any later
11 * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libsmf/smf.h"
25 #include "evoral/Event.hpp"
26 #include "evoral/SMF.hpp"
27 #include "evoral/midi_util.h"
30 extern double round(double x);
43 SMF::num_tracks() const
45 Glib::Threads::Mutex::Lock lm (_smf_lock);
46 return _smf ? _smf->number_of_tracks : 0;
52 Glib::Threads::Mutex::Lock lm (_smf_lock);
56 /** Seek to the specified track (1-based indexing)
57 * \return 0 on success
60 SMF::seek_to_track(int track)
62 Glib::Threads::Mutex::Lock lm (_smf_lock);
63 _smf_track = smf_get_track_by_number(_smf, track);
64 if (_smf_track != NULL) {
65 _smf_track->next_event_number = (_smf_track->number_of_events == 0) ? 0 : 1;
72 /** Attempt to open the SMF file just to see if it is valid.
74 * \return true on success
78 SMF::test(const std::string& path)
80 FILE* f = fopen (path.c_str(), "r");
86 if ((test_smf = smf_load (f)) == NULL) {
89 smf_delete (test_smf);
93 /** Attempt to open the SMF file for reading and/or writing.
95 * \return 0 on success
96 * -1 if the file can not be opened or created
97 * -2 if the file exists but specified track does not exist
100 SMF::open(const std::string& path, int track) THROW_FILE_ERROR
102 Glib::Threads::Mutex::Lock lm (_smf_lock);
111 FILE* f = fopen (_file_path.c_str(), "r");
116 if ((_smf = smf_load (f)) == 0) {
120 if ((_smf_track = smf_get_track_by_number(_smf, track)) == 0) {
124 //cerr << "Track " << track << " # events: " << _smf_track->number_of_events << endl;
125 if (_smf_track->number_of_events == 0) {
126 _smf_track->next_event_number = 0;
129 _smf_track->next_event_number = 1;
137 /** Attempt to create a new SMF file for reading and/or writing.
139 * \return 0 on success
140 * -1 if the file can not be created
141 * -2 if the track can not be created
144 SMF::create(const std::string& path, int track, uint16_t ppqn) THROW_FILE_ERROR
146 Glib::Threads::Mutex::Lock lm (_smf_lock);
161 if (smf_set_ppqn(_smf, ppqn) != 0) {
165 for (int i = 0; i < track; ++i) {
166 _smf_track = smf_track_new();
170 smf_add_track(_smf, _smf_track);
173 _smf_track = smf_get_track_by_number(_smf, track);
177 _smf_track->next_event_number = 0;
180 /* put a stub file on disk */
182 FILE* f = fopen (_file_path.c_str(), "w+");
187 if (smf_save (_smf, f)) {
198 SMF::close() THROW_FILE_ERROR
200 Glib::Threads::Mutex::Lock lm (_smf_lock);
210 SMF::seek_to_start() const
212 Glib::Threads::Mutex::Lock lm (_smf_lock);
214 _smf_track->next_event_number = 1;
216 cerr << "WARNING: SMF seek_to_start() with no track" << endl;
220 /** Read an event from the current position in file.
222 * File position MUST be at the beginning of a delta time, or this will die very messily.
223 * ev.buffer must be of size ev.size, and large enough for the event. The returned event
224 * will have it's time field set to it's delta time, in SMF tempo-based ticks, using the
225 * rate given by ppqn() (it is the caller's responsibility to calculate a real time).
227 * \a buf must be a pointer to a buffer allocated with malloc, or a pointer to NULL.
228 * \a size must be the capacity of \a buf. If it is not large enough, \a buf will
229 * be reallocated and *size will be set to the new size of buf.
231 * if the event is a meta-event and is an Evoral Note ID, then \a note_id will be set
232 * to the value of the NoteID; otherwise, meta-events will set \a note_id to -1.
234 * \return event length (including status byte) on success, 0 if event was
235 * a meta event, or -1 on EOF (or end of track).
238 SMF::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf, event_id_t* note_id) const
240 Glib::Threads::Mutex::Lock lm (_smf_lock);
249 if ((event = smf_track_get_next_event(_smf_track)) != NULL) {
251 *delta_t = event->delta_time_pulses;
253 if (smf_event_is_metadata(event)) {
254 *note_id = -1; // "no note id in this meta-event */
256 if (event->midi_buffer[1] == 0x7f) { // Sequencer-specific
261 if (smf_extract_vlq (&event->midi_buffer[2], event->midi_buffer_length-2, &evsize, &lenlen) == 0) {
263 if (event->midi_buffer[2+lenlen] == 0x99 && // Evoral
264 event->midi_buffer[3+lenlen] == 0x1) { // Evoral Note ID
269 if (smf_extract_vlq (&event->midi_buffer[4+lenlen], event->midi_buffer_length-(4+lenlen), &id, &idlen) == 0) {
275 return 0; /* this is a meta-event */
278 int event_size = event->midi_buffer_length;
279 assert(event_size > 0);
281 // Make sure we have enough scratch buffer
282 if (*size < (unsigned)event_size) {
283 *buf = (uint8_t*)realloc(*buf, event_size);
285 memcpy(*buf, event->midi_buffer, size_t(event_size));
288 assert(midi_event_is_valid(*buf, *size));
290 /* printf("SMF::read_event @ %u: ", *delta_t);
291 for (size_t i = 0; i < *size; ++i) {
292 printf("%X ", (*buf)[i]);
302 SMF::append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf, event_id_t note_id)
304 Glib::Threads::Mutex::Lock lm (_smf_lock);
310 /* printf("SMF::append_event_delta @ %u:", delta_t);
311 for (size_t i = 0; i < size; ++i) {
312 printf("%X ", buf[i]);
315 if (!midi_event_is_valid(buf, size)) {
316 cerr << "WARNING: SMF ignoring illegal MIDI event" << endl;
322 /* XXX july 2010: currently only store event ID's for notes, program changes and bank changes
325 uint8_t const c = buf[0] & 0xf0;
326 bool const store_id = (
327 c == MIDI_CMD_NOTE_ON ||
328 c == MIDI_CMD_NOTE_OFF ||
329 c == MIDI_CMD_PGM_CHANGE ||
330 (c == MIDI_CMD_CONTROL && (buf[1] == MIDI_CTL_MSB_BANK || buf[1] == MIDI_CTL_LSB_BANK))
333 if (store_id && note_id >= 0) {
339 event = smf_event_new ();
340 assert(event != NULL);
342 /* generate VLQ representation of note ID */
343 idlen = smf_format_vlq (idbuf, sizeof(idbuf), note_id);
345 /* generate VLQ representation of meta event length,
346 which is the idlen + 2 bytes (Evoral type ID plus Note ID type)
349 lenlen = smf_format_vlq (lenbuf, sizeof(lenbuf), idlen+2);
351 event->midi_buffer_length = 2 + lenlen + 2 + idlen;
352 /* this should be allocated by malloc(3) because libsmf will
355 event->midi_buffer = (uint8_t*) malloc (sizeof(uint8_t) * event->midi_buffer_length);
357 event->midi_buffer[0] = 0xff; // Meta-event
358 event->midi_buffer[1] = 0x7f; // Sequencer-specific
359 memcpy (&event->midi_buffer[2], lenbuf, lenlen);
360 event->midi_buffer[2+lenlen] = 0x99; // Evoral type ID
361 event->midi_buffer[3+lenlen] = 0x1; // Evoral type Note ID
362 memcpy (&event->midi_buffer[4+lenlen], idbuf, idlen);
365 smf_track_add_event_delta_pulses(_smf_track, event, 0);
368 event = smf_event_new_from_pointer(buf, size);
369 assert(event != NULL);
372 smf_track_add_event_delta_pulses(_smf_track, event, delta_t);
379 Glib::Threads::Mutex::Lock lm (_smf_lock);
382 smf_track_delete(_smf_track);
384 _smf_track = smf_track_new();
387 smf_add_track(_smf, _smf_track);
388 assert(_smf->number_of_tracks == 1);
392 SMF::end_write() THROW_FILE_ERROR
394 Glib::Threads::Mutex::Lock lm (_smf_lock);
395 FILE* f = fopen (_file_path.c_str(), "w+");
397 throw FileError (_file_path);
400 if (smf_save(_smf, f) != 0) {
401 throw FileError (_file_path);
406 SMF::round_to_file_precision (double val) const
410 return round (val * div) / div;
414 SMF::set_path (const std::string& p)
419 } // namespace Evoral