/*
- Copyright (C) 2000-2006 Paul Davis
+ Copyright (C) 2000-2006 Paul Davis
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
#include <set>
-#include <sigc++/bind.h>
-#include <sigc++/class_slot.h>
+#include <glibmm/threads.h>
+#include <glibmm/fileutils.h>
+#include <glibmm/miscutils.h>
-#include <glibmm/thread.h>
+#include "evoral/Beats.hpp"
-#include <pbd/basename.h>
-#include <pbd/xml++.h>
-#include <pbd/enumwriter.h>
+#include "pbd/xml++.h"
+#include "pbd/basename.h"
-#include <ardour/midi_region.h>
-#include <ardour/session.h>
-#include <ardour/gain.h>
-#include <ardour/dB.h>
-#include <ardour/playlist.h>
-#include <ardour/midi_source.h>
-#include <ardour/types.h>
-#include <ardour/midi_ring_buffer.h>
+#include "ardour/automation_control.h"
+#include "ardour/midi_model.h"
+#include "ardour/midi_region.h"
+#include "ardour/midi_ring_buffer.h"
+#include "ardour/midi_source.h"
+#include "ardour/region_factory.h"
+#include "ardour/session.h"
+#include "ardour/source_factory.h"
+#include "ardour/tempo.h"
+#include "ardour/types.h"
-#include "i18n.h"
+#include "pbd/i18n.h"
#include <locale.h>
using namespace std;
using namespace ARDOUR;
+using namespace PBD;
-/** Basic MidiRegion constructor (one channel) */
-MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length)
- : Region (src, start, length, PBD::basename_nosuffix(src->name()), DataType::MIDI, 0, Region::Flag(Region::DefaultFlags|Region::External))
+namespace ARDOUR {
+ namespace Properties {
+ PBD::PropertyDescriptor<Evoral::Beats> start_beats;
+ PBD::PropertyDescriptor<Evoral::Beats> length_beats;
+ }
+}
+
+void
+MidiRegion::make_property_quarks ()
{
- assert(_name.find("/") == string::npos);
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+ Properties::start_beats.property_id = g_quark_from_static_string (X_("start-beats"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for start-beats = %1\n", Properties::start_beats.property_id));
+ Properties::length_beats.property_id = g_quark_from_static_string (X_("length-beats"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for length-beats = %1\n", Properties::length_beats.property_id));
}
-/* Basic MidiRegion constructor (one channel) */
-MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
- : Region (src, start, length, name, DataType::MIDI, layer, flags)
+void
+MidiRegion::register_properties ()
{
- assert(_name.find("/") == string::npos);
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+ add_property (_start_beats);
+ add_property (_length_beats);
}
/* Basic MidiRegion constructor (many channels) */
-MidiRegion::MidiRegion (const SourceList& srcs, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
- : Region (srcs, start, length, name, DataType::MIDI, layer, flags)
+MidiRegion::MidiRegion (const SourceList& srcs)
+ : Region (srcs)
+ , _start_beats (Properties::start_beats, Evoral::Beats())
+ , _length_beats (Properties::length_beats, midi_source(0)->length_beats())
{
- assert(_name.find("/") == string::npos);
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+ register_properties ();
+
+ midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
+ model_changed ();
+ assert(_name.val().find("/") == string::npos);
+ assert(_type == DataType::MIDI);
}
+MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
+ : Region (other)
+ , _start_beats (Properties::start_beats, other->_start_beats)
+ , _length_beats (Properties::length_beats, other->_length_beats)
+{
+ //update_length_beats ();
+ register_properties ();
+
+ assert(_name.val().find("/") == string::npos);
+ midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
+ model_changed ();
+}
-/** Create a new MidiRegion, that is part of an existing one */
-MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, nframes_t offset, nframes_t length, const string& name, layer_t layer, Flag flags)
- : Region (other, offset, length, name, layer, flags)
+/** Create a new MidiRegion that is part of an existing one */
+MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, frameoffset_t offset, const int32_t sub_num)
+ : Region (other, offset, sub_num)
+ , _start_beats (Properties::start_beats, Evoral::Beats())
+ , _length_beats (Properties::length_beats, other->_length_beats)
{
- assert(_name.find("/") == string::npos);
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+ _start_beats = Evoral::Beats (_session.tempo_map().exact_beat_at_frame ((other->_position + offset), sub_num) - other->beat()) + other->_start_beats;
+ update_length_beats (sub_num);
+ register_properties ();
+
+ assert(_name.val().find("/") == string::npos);
+ midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
+ model_changed ();
}
-MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
- : Region (other)
+MidiRegion::~MidiRegion ()
{
- assert(_name.find("/") == string::npos);
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
}
-MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, const XMLNode& node)
- : Region (src, node)
+/** Export the MIDI data of the MidiRegion to a new MIDI file (SMF).
+ */
+bool
+MidiRegion::do_export (string path) const
{
- if (set_state (node)) {
- throw failed_constructor();
+ boost::shared_ptr<MidiSource> newsrc;
+
+ /* caller must check for pre-existing file */
+ assert (!path.empty());
+ assert (!Glib::file_test (path, Glib::FILE_TEST_EXISTS));
+ newsrc = boost::dynamic_pointer_cast<MidiSource>(
+ SourceFactory::createWritable(DataType::MIDI, _session,
+ path, false, _session.frame_rate()));
+
+ BeatsFramesConverter bfc (_session.tempo_map(), _position);
+ Evoral::Beats const bbegin = bfc.from (_start);
+ Evoral::Beats const bend = bfc.from (_start + _length);
+
+ {
+ /* Lock our source since we'll be reading from it. write_to() will
+ take a lock on newsrc. */
+ Source::Lock lm (midi_source(0)->mutex());
+ if (midi_source(0)->export_write_to (lm, newsrc, bbegin, bend)) {
+ return false;
+ }
}
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
- assert(_name.find("/") == string::npos);
- assert(_type == DataType::MIDI);
+ return true;
}
-MidiRegion::MidiRegion (const SourceList& srcs, const XMLNode& node)
- : Region (srcs, node)
+
+/** Create a new MidiRegion that has its own version of some/all of the Source used by another.
+ */
+boost::shared_ptr<MidiRegion>
+MidiRegion::clone (string path) const
{
- if (set_state (node)) {
- throw failed_constructor();
+ boost::shared_ptr<MidiSource> newsrc;
+
+ /* caller must check for pre-existing file */
+ assert (!path.empty());
+ assert (!Glib::file_test (path, Glib::FILE_TEST_EXISTS));
+ newsrc = boost::dynamic_pointer_cast<MidiSource>(
+ SourceFactory::createWritable(DataType::MIDI, _session,
+ path, false, _session.frame_rate()));
+ return clone (newsrc);
+}
+
+boost::shared_ptr<MidiRegion>
+MidiRegion::clone (boost::shared_ptr<MidiSource> newsrc) const
+{
+ BeatsFramesConverter bfc (_session.tempo_map(), _position);
+ Evoral::Beats const bbegin = bfc.from (_start);
+ Evoral::Beats const bend = bfc.from (_start + _length);
+
+ {
+ /* Lock our source since we'll be reading from it. write_to() will
+ take a lock on newsrc. */
+ Source::Lock lm (midi_source(0)->mutex());
+ if (midi_source(0)->write_to (lm, newsrc, bbegin, bend)) {
+ return boost::shared_ptr<MidiRegion> ();
+ }
}
- midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
- assert(_name.find("/") == string::npos);
- assert(_type == DataType::MIDI);
+ PropertyList plist;
+
+ plist.add (Properties::name, PBD::basename_nosuffix (newsrc->name()));
+ plist.add (Properties::whole_file, true);
+ plist.add (Properties::start, _start);
+ plist.add (Properties::start_beats, _start_beats);
+ plist.add (Properties::length, _length);
+ plist.add (Properties::length_beats, _length_beats);
+ plist.add (Properties::layer, 0);
+
+ boost::shared_ptr<MidiRegion> ret (boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (newsrc, plist, true)));
+ ret->set_beat (beat());
+
+ return ret;
}
-MidiRegion::~MidiRegion ()
+void
+MidiRegion::post_set (const PropertyChange& pc)
{
+ Region::post_set (pc);
+
+ if (pc.contains (Properties::length) && !pc.contains (Properties::length_beats)) {
+ /* update non-musically */
+ update_length_beats (0);
+ } else if (pc.contains (Properties::start) && !pc.contains (Properties::start_beats)) {
+ set_start_beats_from_start_frames ();
+ }
}
-nframes_t
-MidiRegion::read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+void
+MidiRegion::set_start_beats_from_start_frames ()
{
- return _read_at (_sources, out, position, dur, chan_n, mode);
+ _start_beats = Evoral::Beats (beat() - _session.tempo_map().beat_at_frame (_position - _start));
}
-nframes_t
-MidiRegion::master_read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+void
+MidiRegion::set_length_internal (framecnt_t len, const int32_t sub_num)
{
- return _read_at (_master_sources, out, position, dur, chan_n, mode);
+ Region::set_length_internal (len, sub_num);
+ update_length_beats (sub_num);
}
-nframes_t
-MidiRegion::_read_at (const SourceList& srcs, MidiRingBuffer& dst, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+void
+MidiRegion::update_after_tempo_map_change (bool /* send */)
{
- /*cerr << "MidiRegion " << _name << "._read_at(" << position << ") - "
- << position << " duration: " << dur << endl;*/
+ boost::shared_ptr<Playlist> pl (playlist());
- nframes_t internal_offset = 0;
- nframes_t src_offset = 0;
- nframes_t to_read = 0;
-
- /* precondition: caller has verified that we cover the desired section */
-
- assert(chan_n == 0);
-
- if (position < _position) {
- internal_offset = 0;
- src_offset = _position - position;
- dur -= src_offset;
- } else {
- internal_offset = position - _position;
- src_offset = 0;
+ if (!pl || position_lock_style() != MusicTime) {
+ return;
}
- if (internal_offset >= _length) {
- return 0; /* read nothing */
- }
-
+ const framepos_t old_pos = _position;
+ const framepos_t old_length = _length;
+ const framepos_t old_start = _start;
- if ((to_read = min (dur, _length - internal_offset)) == 0) {
- return 0; /* read nothing */
- }
+ Region::update_after_tempo_map_change (false);
- // FIXME: non-opaque MIDI regions not yet supported
- assert(opaque());
+ /* _start has now been updated. */
+ _length = _session.tempo_map().frame_at_beat (beat() + _length_beats.val().to_double()) - _position;
- if (muted()) {
- return 0; /* read nothing */
+ PropertyChange s_and_l;
+ if (old_start != _start) {
+ s_and_l.add (Properties::start);
}
-
- _read_data_count = 0;
-
- boost::shared_ptr<MidiSource> src = midi_source(chan_n);
- src->set_note_mode(mode);
-
- nframes_t output_buffer_position = 0;
- nframes_t negative_output_buffer_position = 0;
- if (_position >= _start) {
- // handle resizing of beginnings of regions correctly
- output_buffer_position = _position - _start;
- } else {
- // when _start is greater than _position, we have to subtract
- // _start from the note times in the midi source
- negative_output_buffer_position = _start;
+ if (old_length != _length) {
+ s_and_l.add (Properties::length);
}
-
- if (src->midi_read (
- // the destination buffer
- dst,
- // where to start reading in the region
- _start + internal_offset,
- // how many bytes
- to_read,
- // the offset in the output buffer
- output_buffer_position,
- // what to substract from note times written in the output buffer
- negative_output_buffer_position
- ) != to_read) {
- return 0; /* "read nothing" */
+ if (old_pos != _position) {
+ s_and_l.add (Properties::position);
}
- _read_data_count += src->read_data_count();
+ send_change (s_and_l);
+}
- return to_read;
+void
+MidiRegion::update_length_beats (const int32_t sub_num)
+{
+ _length_beats = Evoral::Beats (_session.tempo_map().exact_beat_at_frame (_position + _length, sub_num) - beat());
}
-
-XMLNode&
-MidiRegion::state (bool full)
-{
- XMLNode& node (Region::state (full));
- char buf[64];
- char buf2[64];
- LocaleGuard lg (X_("POSIX"));
-
- node.add_property ("flags", enum_2_string (_flags));
-
- // XXX these should move into Region
-
- for (uint32_t n=0; n < _sources.size(); ++n) {
- snprintf (buf2, sizeof(buf2), "source-%d", n);
- _sources[n]->id().print (buf, sizeof(buf));
- node.add_property (buf2, buf);
- }
- for (uint32_t n=0; n < _master_sources.size(); ++n) {
- snprintf (buf2, sizeof(buf2), "master-source-%d", n);
- _master_sources[n]->id().print (buf, sizeof (buf));
- node.add_property (buf2, buf);
- }
+void
+MidiRegion::set_position_internal (framepos_t pos, bool allow_bbt_recompute, const int32_t sub_num)
+{
+ Region::set_position_internal (pos, allow_bbt_recompute, sub_num);
- if (full && _extra_xml) {
- node.add_child_copy (*_extra_xml);
+ /* set _start to new position in tempo map */
+ _start = _position - _session.tempo_map().frame_at_beat (beat() - _start_beats.val().to_double());
+
+ /* in construction from src */
+ if (_length_beats == Evoral::Beats()) {
+ update_length_beats (sub_num);
}
- return node;
+ /* leave _length_beats alone, and change _length to reflect the state of things
+ at the new position (tempo map may dictate a different number of frames).
+ */
+ Region::set_length_internal (_session.tempo_map().frame_at_beat (beat() + _length_beats.val().to_double()) - _position, sub_num);
}
-int
-MidiRegion::set_live_state (const XMLNode& node, Change& what_changed, bool send)
+framecnt_t
+MidiRegion::read_at (Evoral::EventSink<framepos_t>& out,
+ framepos_t position,
+ framecnt_t dur,
+ uint32_t chan_n,
+ NoteMode mode,
+ MidiStateTracker* tracker,
+ MidiChannelFilter* filter) const
{
- const XMLProperty *prop;
- LocaleGuard lg (X_("POSIX"));
+ return _read_at (_sources, out, position, dur, chan_n, mode, tracker, filter);
+}
- Region::set_live_state (node, what_changed, false);
+framecnt_t
+MidiRegion::master_read_at (MidiRingBuffer<framepos_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode) const
+{
+ return _read_at (_master_sources, out, position, dur, chan_n, mode); /* no tracker */
+}
- uint32_t old_flags = _flags;
-
- if ((prop = node.property ("flags")) != 0) {
- _flags = Flag (string_2_enum (prop->value(), _flags));
+framecnt_t
+MidiRegion::_read_at (const SourceList& /*srcs*/,
+ Evoral::EventSink<framepos_t>& dst,
+ framepos_t position,
+ framecnt_t dur,
+ uint32_t chan_n,
+ NoteMode mode,
+ MidiStateTracker* tracker,
+ MidiChannelFilter* filter) const
+{
+ frameoffset_t internal_offset = 0;
+ framecnt_t to_read = 0;
- //_flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
+ /* precondition: caller has verified that we cover the desired section */
- _flags = Flag (_flags & ~Region::LeftOfSplit);
- _flags = Flag (_flags & ~Region::RightOfSplit);
+ assert(chan_n == 0);
+
+ if (muted()) {
+ return 0; /* read nothing */
}
- if ((old_flags ^ _flags) & Muted) {
- what_changed = Change (what_changed|MuteChanged);
+ if (position < _position) {
+ /* we are starting the read from before the start of the region */
+ internal_offset = 0;
+ dur -= _position - position;
+ } else {
+ /* we are starting the read from after the start of the region */
+ internal_offset = position - _position;
}
- if ((old_flags ^ _flags) & Opaque) {
- what_changed = Change (what_changed|OpacityChanged);
+
+ if (internal_offset >= _length) {
+ return 0; /* read nothing */
}
- if ((old_flags ^ _flags) & Locked) {
- what_changed = Change (what_changed|LockChanged);
+
+ if ((to_read = min (dur, _length - internal_offset)) == 0) {
+ return 0; /* read nothing */
}
- if (send) {
- send_change (what_changed);
+ boost::shared_ptr<MidiSource> src = midi_source(chan_n);
+
+ Glib::Threads::Mutex::Lock lm(src->mutex());
+
+ src->set_note_mode(lm, mode);
+
+ /*
+ cerr << "MR " << name () << " read @ " << position << " * " << to_read
+ << " _position = " << _position
+ << " _start = " << _start
+ << " intoffset = " << internal_offset
+ << endl;
+ */
+
+ /* This call reads events from a source and writes them to `dst' timed in session frames */
+
+ if (src->midi_read (
+ lm, // source lock
+ dst, // destination buffer
+ _position - _start, // start position of the source in session frames
+ _start + internal_offset, // where to start reading in the source
+ to_read, // read duration in frames
+ tracker,
+ filter,
+ _filtered_parameters,
+ beat(),
+ _start_beats.val().to_double()
+ ) != to_read) {
+ return 0; /* "read nothing" */
}
- return 0;
+ return to_read;
+}
+
+XMLNode&
+MidiRegion::state ()
+{
+ return Region::state ();
}
int
-MidiRegion::set_state (const XMLNode& node)
+MidiRegion::set_state (const XMLNode& node, int version)
{
- /* Region::set_state() calls the virtual set_live_state(),
- which will get us back to AudioRegion::set_live_state()
- to handle the relevant stuff.
- */
+ int ret = Region::set_state (node, version);
+
+ if (ret == 0) {
+ /* set length beats to the frame (non-musical) */
+ if (position_lock_style() == AudioTime) {
+ update_length_beats (0);
+ }
+ }
- return Region::set_state (node);
+ return ret;
}
void
MidiRegion::recompute_at_end ()
{
/* our length has changed
- * (non destructively) "chop" notes that pass the end boundary, to
- * prevent stuck notes.
+ * so what? stuck notes are dealt with via a note state tracker
*/
-}
+}
void
MidiRegion::recompute_at_start ()
}
int
-MidiRegion::separate_by_channel (Session& session, vector<MidiRegion*>& v) const
+MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
{
- // Separate by MIDI channel? bit different from audio since this is separating based
- // on the actual contained data and destructively modifies and creates new sources..
-
-#if 0
- SourceList srcs;
- string new_name;
-
- for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
-
- srcs.clear ();
- srcs.push_back (*i);
-
- /* generate a new name */
-
- if (session.region_name (new_name, _name)) {
- return -1;
- }
+ // TODO
+ return -1;
+}
- /* create a copy with just one source */
+boost::shared_ptr<Evoral::Control>
+MidiRegion::control (const Evoral::Parameter& id, bool create)
+{
+ return model()->control(id, create);
+}
- v.push_back (new MidiRegion (srcs, _start, _length, new_name, _layer, _flags));
- }
-#endif
+boost::shared_ptr<const Evoral::Control>
+MidiRegion::control (const Evoral::Parameter& id) const
+{
+ return model()->control(id);
+}
- // Actually, I would prefer not if that's alright
- return -1;
+boost::shared_ptr<MidiModel>
+MidiRegion::model()
+{
+ return midi_source()->model();
}
-int
-MidiRegion::exportme (ARDOUR::Session&, ARDOUR::ExportSpecification&)
+boost::shared_ptr<const MidiModel>
+MidiRegion::model() const
{
- return -1;
+ return midi_source()->model();
}
boost::shared_ptr<MidiSource>
return boost::dynamic_pointer_cast<MidiSource>(source(n));
}
-
void
-MidiRegion::switch_source(boost::shared_ptr<Source> src)
+MidiRegion::model_changed ()
{
- boost::shared_ptr<MidiSource> msrc = boost::dynamic_pointer_cast<MidiSource>(src);
- if (!msrc)
+ if (!model()) {
return;
+ }
+
+ /* build list of filtered Parameters, being those whose automation state is not `Play' */
+
+ _filtered_parameters.clear ();
+
+ Automatable::Controls const & c = model()->controls();
+
+ for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
+ boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
+ assert (ac);
+ if (ac->alist()->automation_state() != Play) {
+ _filtered_parameters.insert (ac->parameter ());
+ }
+ }
+
+ /* watch for changes to controls' AutoState */
+ midi_source()->AutomationStateChanged.connect_same_thread (
+ _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
+ );
+}
+
+void
+MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
+{
+ /* Update our filtered parameters list after a change to a parameter's AutoState */
+
+ boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
+ if (!ac || ac->alist()->automation_state() == Play) {
+ /* It should be "impossible" for ac to be NULL, but if it is, don't
+ filter the parameter so events aren't lost. */
+ _filtered_parameters.erase (p);
+ } else {
+ _filtered_parameters.insert (p);
+ }
+
+ /* the source will have an iterator into the model, and that iterator will have been set up
+ for a given set of filtered_parameters, so now that we've changed that list we must invalidate
+ the iterator.
+ */
+ Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex(), Glib::Threads::TRY_LOCK);
+ if (lm.locked()) {
+ /* TODO: This is too aggressive, we need more fine-grained invalidation. */
+ midi_source(0)->invalidate (lm);
+ }
+}
- // MIDI regions have only one source
- _sources.clear();
- _sources.push_back(msrc);
+/** This is called when a trim drag has resulted in a -ve _start time for this region.
+ * Fix it up by adding some empty space to the source.
+ */
+void
+MidiRegion::fix_negative_start ()
+{
+ BeatsFramesConverter c (_session.tempo_map(), _position);
- set_name(msrc->name());
+ model()->insert_silence_at_start (c.from (-_start));
+ _start = 0;
+ _start_beats = Evoral::Beats();
}
+void
+MidiRegion::set_start_internal (framecnt_t s, const int32_t sub_num)
+{
+ Region::set_start_internal (s, sub_num);
+
+ if (position_lock_style() == AudioTime) {
+ set_start_beats_from_start_frames ();
+ }
+}
+
+void
+MidiRegion::trim_to_internal (framepos_t position, framecnt_t length, const int32_t sub_num)
+{
+ framepos_t new_start;
+
+ if (locked()) {
+ return;
+ }
+
+ PropertyChange what_changed;
+
+ /* beat has been set exactly by set_position_internal, but the source starts on a frame.
+ working in beats seems the correct thing to do, but reports of a missing first note
+ on playback suggest otherwise. for now, we work in exact beats.
+ */
+ const double pos_beat = _session.tempo_map().exact_beat_at_frame (position, sub_num);
+ const double beat_delta = pos_beat - beat();
+
+ /* Set position before length, otherwise for MIDI regions this bad thing happens:
+ * 1. we call set_length_internal; length in beats is computed using the region's current
+ * (soon-to-be old) position
+ * 2. we call set_position_internal; position is set and length in frames re-computed using
+ * length in beats from (1) but at the new position, which is wrong if the region
+ * straddles a tempo/meter change.
+ */
+
+ if (_position != position) {
+ set_position_internal (position, true, sub_num);
+ what_changed.add (Properties::position);
+ }
+
+ const double new_start_beat = _start_beats.val().to_double() + beat_delta;
+ new_start = _position - _session.tempo_map().frame_at_beat (beat() - new_start_beat);
+
+ if (!verify_start_and_length (new_start, length)) {
+ return;
+ }
+
+ if (_start != new_start) {
+ _start_beats = Evoral::Beats (new_start_beat);
+ what_changed.add (Properties::start_beats);
+
+ set_start_internal (new_start, sub_num);
+ what_changed.add (Properties::start);
+ }
+
+ if (_length != length) {
+ set_length_internal (length, sub_num);
+ what_changed.add (Properties::length);
+ what_changed.add (Properties::length_beats);
+ }
+
+ set_whole_file (false);
+
+ PropertyChange start_and_length;
+
+ start_and_length.add (Properties::start);
+ start_and_length.add (Properties::length);
+
+ if (what_changed.contains (start_and_length)) {
+ first_edit ();
+ }
+
+ if (!what_changed.empty()) {
+ send_change (what_changed);
+ }
+}