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-rw-r--r--libs/evoral/SMF.cc603
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diff --git a/libs/evoral/SMF.cc b/libs/evoral/SMF.cc
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+/*
+ * Copyright (C) 2008-2015 David Robillard <d@drobilla.net>
+ * Copyright (C) 2009-2018 Paul Davis <paul@linuxaudiosystems.com>
+ * Copyright (C) 2009 Hans Baier <hansfbaier@googlemail.com>
+ * Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
+ * Copyright (C) 2014-2018 Robin Gareus <robin@gareus.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <iostream>
+#include <stdint.h>
+
+#include <glib/gstdio.h>
+
+#include "libsmf/smf.h"
+
+#include "evoral/Event.h"
+#include "evoral/SMF.h"
+#include "evoral/midi_util.h"
+
+#ifdef COMPILER_MSVC
+extern double round(double x);
+#endif
+
+using namespace std;
+
+namespace Evoral {
+
+SMF::SMF()
+ : _smf (0)
+ , _smf_track (0)
+ , _empty (true)
+ , _type0 (false)
+ {};
+
+SMF::~SMF()
+{
+ close ();
+}
+
+uint16_t
+SMF::num_tracks() const
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+ return _smf ? _smf->number_of_tracks : 0;
+}
+
+uint16_t
+SMF::ppqn() const
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+ return _smf->ppqn;
+}
+
+/** Seek to the specified track (1-based indexing)
+ * \return 0 on success
+ */
+int
+SMF::seek_to_track(int track)
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+ _smf_track = smf_get_track_by_number(_smf, track);
+ if (_smf_track != NULL) {
+ _smf_track->next_event_number = (_smf_track->number_of_events == 0) ? 0 : 1;
+ return 0;
+ } else {
+ return -1;
+ }
+}
+
+/** Attempt to open the SMF file just to see if it is valid.
+ *
+ * \return true on success
+ * false on failure
+ */
+bool
+SMF::test(const std::string& path)
+{
+ FILE* f = g_fopen(path.c_str(), "r");
+ if (f == 0) {
+ return false;
+ }
+
+ smf_t* test_smf = smf_load(f);
+ fclose(f);
+
+ if (!test_smf) {
+ return false;
+ }
+ if (test_smf) {
+ smf_delete(test_smf);
+ }
+ return true;
+}
+
+/** Attempt to open the SMF file for reading and/or writing.
+ *
+ * \return 0 on success
+ * -1 if the file can not be opened or created
+ * -2 if the file exists but specified track does not exist
+ */
+int
+SMF::open(const std::string& path, int track)
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ _type0 = false;
+ _type0channels.clear ();
+
+ assert(track >= 1);
+ if (_smf) {
+ smf_delete(_smf);
+ }
+
+ FILE* f = g_fopen(path.c_str(), "r");
+ if (f == 0) {
+ return -1;
+ } else if ((_smf = smf_load(f)) == 0) {
+ fclose(f);
+ return -1;
+ } else if ((_smf_track = smf_get_track_by_number(_smf, track)) == 0) {
+ fclose(f);
+ return -2;
+ }
+
+ //cerr << "Track " << track << " # events: " << _smf_track->number_of_events << endl;
+ if (_smf_track->number_of_events == 0) {
+ _smf_track->next_event_number = 0;
+ _empty = true;
+ } else {
+ _smf_track->next_event_number = 1;
+ _empty = false;
+ }
+
+ fclose(f);
+
+ lm.release ();
+ if (_smf->format == 0 && _smf->number_of_tracks == 1 && !_empty) {
+ // type-0 file: scan file for # of used channels.
+ int ret;
+ uint32_t delta_t = 0;
+ uint32_t size = 0;
+ uint8_t* buf = NULL;
+ event_id_t event_id = 0;
+ seek_to_start();
+ while ((ret = read_event (&delta_t, &size, &buf, &event_id)) >= 0) {
+ if (ret == 0) {
+ continue;
+ }
+ if (size == 0) {
+ break;
+ }
+ uint8_t type = buf[0] & 0xf0;
+ uint8_t chan = buf[0] & 0x0f;
+ if (type < 0x80 || type > 0xE0) {
+ continue;
+ }
+ _type0channels.insert(chan);
+ }
+ _type0 = true;
+ seek_to_start();
+ }
+ return 0;
+}
+
+
+/** Attempt to create a new SMF file for reading and/or writing.
+ *
+ * \return 0 on success
+ * -1 if the file can not be created
+ * -2 if the track can not be created
+ */
+int
+SMF::create(const std::string& path, int track, uint16_t ppqn)
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ assert(track >= 1);
+ if (_smf) {
+ smf_delete(_smf);
+ }
+
+ _smf = smf_new();
+
+ if (_smf == NULL) {
+ return -1;
+ }
+
+ if (smf_set_ppqn(_smf, ppqn) != 0) {
+ return -1;
+ }
+
+ for (int i = 0; i < track; ++i) {
+ _smf_track = smf_track_new();
+ if (!_smf_track) {
+ return -2;
+ }
+ smf_add_track(_smf, _smf_track);
+ }
+
+ _smf_track = smf_get_track_by_number(_smf, track);
+ if (!_smf_track)
+ return -2;
+
+ _smf_track->next_event_number = 0;
+
+ {
+ /* put a stub file on disk */
+
+ FILE* f = g_fopen (path.c_str(), "w+");
+ if (f == 0) {
+ return -1;
+ }
+
+ if (smf_save (_smf, f)) {
+ fclose (f);
+ return -1;
+ }
+ fclose (f);
+ }
+
+ _empty = true;
+ _type0 = false;
+ _type0channels.clear ();
+
+ return 0;
+}
+
+void
+SMF::close()
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ if (_smf) {
+ smf_delete(_smf);
+ _smf = 0;
+ _smf_track = 0;
+ _type0 = false;
+ _type0channels.clear ();
+ }
+}
+
+void
+SMF::seek_to_start() const
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+ if (_smf_track) {
+ _smf_track->next_event_number = std::min(_smf_track->number_of_events, (size_t)1);
+ } else {
+ cerr << "WARNING: SMF seek_to_start() with no track" << endl;
+ }
+}
+
+/** Read an event from the current position in file.
+ *
+ * File position MUST be at the beginning of a delta time, or this will die very messily.
+ * ev.buffer must be of size ev.size, and large enough for the event. The returned event
+ * will have it's time field set to it's delta time, in SMF tempo-based ticks, using the
+ * rate given by ppqn() (it is the caller's responsibility to calculate a real time).
+ *
+ * \a buf must be a pointer to a buffer allocated with malloc, or a pointer to NULL.
+ * \a size must be the capacity of \a buf. If it is not large enough, \a buf will
+ * be reallocated and *size will be set to the new size of buf.
+ *
+ * if the event is a meta-event and is an Evoral Note ID, then \a note_id will be set
+ * to the value of the NoteID; otherwise, meta-events will set \a note_id to -1.
+ *
+ * \return event length (including status byte) on success, 0 if event was
+ * a meta event, or -1 on EOF (or end of track).
+ */
+int
+SMF::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf, event_id_t* note_id) const
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ smf_event_t* event;
+
+ assert(delta_t);
+ assert(size);
+ assert(buf);
+ assert(note_id);
+
+ if ((event = smf_track_get_next_event(_smf_track)) != NULL) {
+
+ *delta_t = event->delta_time_pulses;
+
+ if (smf_event_is_metadata(event)) {
+ *note_id = -1; // "no note id in this meta-event */
+
+ if (event->midi_buffer[1] == 0x7f) { // Sequencer-specific
+
+ uint32_t evsize;
+ uint32_t lenlen;
+
+ if (smf_extract_vlq (&event->midi_buffer[2], event->midi_buffer_length-2, &evsize, &lenlen) == 0) {
+
+ if (event->midi_buffer[2+lenlen] == 0x99 && // Evoral
+ event->midi_buffer[3+lenlen] == 0x1) { // Evoral Note ID
+
+ uint32_t id;
+ uint32_t idlen;
+
+ if (smf_extract_vlq (&event->midi_buffer[4+lenlen], event->midi_buffer_length-(4+lenlen), &id, &idlen) == 0) {
+ *note_id = id;
+ }
+ }
+ }
+ }
+ return 0; /* this is a meta-event */
+ }
+
+ int event_size = event->midi_buffer_length;
+ assert(event_size > 0);
+
+ // Make sure we have enough scratch buffer
+ if (*size < (unsigned)event_size) {
+ *buf = (uint8_t*)realloc(*buf, event_size);
+ }
+ assert (*buf);
+ memcpy(*buf, event->midi_buffer, size_t(event_size));
+ *size = event_size;
+ if (((*buf)[0] & 0xF0) == 0x90 && (*buf)[2] == 0) {
+ /* normalize note on with velocity 0 to proper note off */
+ (*buf)[0] = 0x80 | ((*buf)[0] & 0x0F); /* note off */
+ (*buf)[2] = 0x40; /* default velocity */
+ }
+
+ if (!midi_event_is_valid(*buf, *size)) {
+ cerr << "WARNING: SMF ignoring illegal MIDI event" << endl;
+ *size = 0;
+ return -1;
+ }
+
+ /* printf("SMF::read_event @ %u: ", *delta_t);
+ for (size_t i = 0; i < *size; ++i) {
+ printf("%X ", (*buf)[i]);
+ } printf("\n") */
+
+ return event_size;
+ } else {
+ return -1;
+ }
+}
+
+void
+SMF::append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf, event_id_t note_id)
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ if (size == 0) {
+ return;
+ }
+
+ /* printf("SMF::append_event_delta @ %u:", delta_t);
+ for (size_t i = 0; i < size; ++i) {
+ printf("%X ", buf[i]);
+ } printf("\n"); */
+
+ switch (buf[0]) {
+ case 0xf1:
+ case 0xf2:
+ case 0xf3:
+ case 0xf4:
+ case 0xf5:
+ case 0xf6:
+ case 0xf8:
+ case 0xf9:
+ case 0xfa:
+ case 0xfb:
+ case 0xfc:
+ case 0xfd:
+ case 0xfe:
+ case 0xff:
+ /* System Real Time or System Common event: not valid in SMF
+ */
+ return;
+ }
+
+ if (!midi_event_is_valid(buf, size)) {
+ cerr << "WARNING: SMF ignoring illegal MIDI event" << endl;
+ return;
+ }
+
+ smf_event_t* event;
+
+ /* XXX july 2010: currently only store event ID's for notes, program changes and bank changes
+ */
+
+ uint8_t const c = buf[0] & 0xf0;
+ bool const store_id = (
+ c == MIDI_CMD_NOTE_ON ||
+ c == MIDI_CMD_NOTE_OFF ||
+ c == MIDI_CMD_NOTE_PRESSURE ||
+ c == MIDI_CMD_PGM_CHANGE ||
+ (c == MIDI_CMD_CONTROL && (buf[1] == MIDI_CTL_MSB_BANK || buf[1] == MIDI_CTL_LSB_BANK))
+ );
+
+ if (store_id && note_id >= 0) {
+ int idlen;
+ int lenlen;
+ uint8_t idbuf[16];
+ uint8_t lenbuf[16];
+
+ event = smf_event_new ();
+ assert(event != NULL);
+
+ /* generate VLQ representation of note ID */
+ idlen = smf_format_vlq (idbuf, sizeof(idbuf), note_id);
+
+ /* generate VLQ representation of meta event length,
+ which is the idlen + 2 bytes (Evoral type ID plus Note ID type)
+ */
+
+ lenlen = smf_format_vlq (lenbuf, sizeof(lenbuf), idlen+2);
+
+ event->midi_buffer_length = 2 + lenlen + 2 + idlen;
+ /* this should be allocated by malloc(3) because libsmf will
+ call free(3) on it
+ */
+ event->midi_buffer = (uint8_t*) malloc (sizeof(uint8_t) * event->midi_buffer_length);
+
+ event->midi_buffer[0] = 0xff; // Meta-event
+ event->midi_buffer[1] = 0x7f; // Sequencer-specific
+ memcpy (&event->midi_buffer[2], lenbuf, lenlen);
+ event->midi_buffer[2+lenlen] = 0x99; // Evoral type ID
+ event->midi_buffer[3+lenlen] = 0x1; // Evoral type Note ID
+ memcpy (&event->midi_buffer[4+lenlen], idbuf, idlen);
+
+ assert(_smf_track);
+ smf_track_add_event_delta_pulses(_smf_track, event, 0);
+ }
+
+ event = smf_event_new_from_pointer(buf, size);
+ assert(event != NULL);
+
+ assert(_smf_track);
+ smf_track_add_event_delta_pulses(_smf_track, event, delta_t);
+ _empty = false;
+}
+
+void
+SMF::begin_write()
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ assert(_smf_track);
+ smf_track_delete(_smf_track);
+
+ _smf_track = smf_track_new();
+ assert(_smf_track);
+
+ smf_add_track(_smf, _smf_track);
+ assert(_smf->number_of_tracks == 1);
+}
+
+void
+SMF::end_write(string const & path)
+{
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ if (!_smf) {
+ return;
+ }
+
+ FILE* f = g_fopen (path.c_str(), "w+");
+ if (f == 0) {
+ throw FileError (path);
+ }
+
+ if (smf_save(_smf, f) != 0) {
+ fclose(f);
+ throw FileError (path);
+ }
+
+ fclose(f);
+}
+
+double
+SMF::round_to_file_precision (double val) const
+{
+ double div = ppqn();
+
+ return round (val * div) / div;
+}
+
+void
+SMF::track_names(vector<string>& names) const
+{
+ if (!_smf) {
+ return;
+ }
+
+ names.clear ();
+
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ for (uint16_t n = 0; n < _smf->number_of_tracks; ++n) {
+ smf_track_t* trk = smf_get_track_by_number (_smf, n+1);
+ if (!trk) {
+ names.push_back (string());
+ } else {
+ if (trk->name) {
+ names.push_back (trk->name);
+ } else {
+ names.push_back (string());
+ }
+ }
+ }
+}
+
+void
+SMF::instrument_names(vector<string>& names) const
+{
+ if (!_smf) {
+ return;
+ }
+
+ names.clear ();
+
+ Glib::Threads::Mutex::Lock lm (_smf_lock);
+
+ for (uint16_t n = 0; n < _smf->number_of_tracks; ++n) {
+ smf_track_t* trk = smf_get_track_by_number (_smf, n+1);
+ if (!trk) {
+ names.push_back (string());
+ } else {
+ if (trk->instrument) {
+ names.push_back (trk->instrument);
+ } else {
+ names.push_back (string());
+ }
+ }
+ }
+}
+
+SMF::Tempo::Tempo (smf_tempo_t* smft)
+ : time_pulses (smft->time_pulses)
+ , time_seconds (smft->time_seconds)
+ , microseconds_per_quarter_note (smft->microseconds_per_quarter_note)
+ , numerator (smft->numerator)
+ , denominator (smft->denominator)
+ , clocks_per_click (smft->clocks_per_click)
+ , notes_per_note (smft->notes_per_note)
+{
+}
+
+int
+SMF::num_tempos () const
+{
+ assert (_smf);
+ return smf_get_tempo_count (_smf);
+}
+
+SMF::Tempo*
+SMF::tempo_at_smf_pulse (size_t smf_pulse) const
+{
+ smf_tempo_t* t = smf_get_tempo_by_seconds (_smf, smf_pulse);
+ if (!t) {
+ return 0;
+ }
+ return new Tempo (t);
+}
+
+SMF::Tempo*
+SMF::tempo_at_seconds (double seconds) const
+{
+ smf_tempo_t* t = smf_get_tempo_by_seconds (_smf, seconds);
+ if (!t) {
+ return 0;
+ }
+ return new Tempo (t);
+}
+
+SMF::Tempo*
+SMF::nth_tempo (size_t n) const
+{
+ assert (_smf);
+
+ smf_tempo_t* t = smf_get_tempo_by_number (_smf, n);
+ if (!t) {
+ return 0;
+ }
+
+ return new Tempo (t);
+}
+
+} // namespace Evoral
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