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livetrax/libs/ardour/midi_source.cc

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/*
Copyright (C) 2006 Paul Davis
Author: David Robillard
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <float.h>
#include <cerrno>
#include <ctime>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include "pbd/xml++.h"
#include "pbd/pthread_utils.h"
#include "pbd/basename.h"
#include "evoral/Control.hpp"
#include "evoral/EventSink.hpp"
#include "ardour/debug.h"
#include "ardour/file_source.h"
#include "ardour/midi_channel_filter.h"
#include "ardour/midi_model.h"
#include "ardour/midi_source.h"
#include "ardour/midi_state_tracker.h"
#include "ardour/session.h"
#include "ardour/session_directory.h"
#include "ardour/source_factory.h"
#include "i18n.h"
namespace ARDOUR { template <typename T> class MidiRingBuffer; }
using namespace std;
using namespace ARDOUR;
using namespace PBD;
PBD::Signal1<void,MidiSource*> MidiSource::MidiSourceCreated;
MidiSource::MidiSource (Session& s, string name, Source::Flag flags)
: Source(s, DataType::MIDI, name, flags)
, _writing(false)
, _model_iter_valid(false)
, _length_beats(0.0)
, _last_read_end(0)
, _capture_length(0)
, _capture_loop_length(0)
{
}
MidiSource::MidiSource (Session& s, const XMLNode& node)
: Source(s, node)
, _writing(false)
, _model_iter_valid(false)
, _length_beats(0.0)
, _last_read_end(0)
, _capture_length(0)
, _capture_loop_length(0)
{
if (set_state (node, Stateful::loading_state_version)) {
throw failed_constructor();
}
}
MidiSource::~MidiSource ()
{
}
XMLNode&
MidiSource::get_state ()
{
XMLNode& node (Source::get_state());
if (_captured_for.length()) {
node.add_property ("captured-for", _captured_for);
}
for (InterpolationStyleMap::const_iterator i = _interpolation_style.begin(); i != _interpolation_style.end(); ++i) {
XMLNode* child = node.add_child (X_("InterpolationStyle"));
child->add_property (X_("parameter"), EventTypeMap::instance().to_symbol (i->first));
child->add_property (X_("style"), enum_2_string (i->second));
}
for (AutomationStateMap::const_iterator i = _automation_state.begin(); i != _automation_state.end(); ++i) {
XMLNode* child = node.add_child (X_("AutomationState"));
child->add_property (X_("parameter"), EventTypeMap::instance().to_symbol (i->first));
child->add_property (X_("state"), enum_2_string (i->second));
}
return node;
}
int
MidiSource::set_state (const XMLNode& node, int /*version*/)
{
const XMLProperty* prop;
if ((prop = node.property ("captured-for")) != 0) {
_captured_for = prop->value();
}
XMLNodeList children = node.children ();
for (XMLNodeConstIterator i = children.begin(); i != children.end(); ++i) {
if ((*i)->name() == X_("InterpolationStyle")) {
if ((prop = (*i)->property (X_("parameter"))) == 0) {
error << _("Missing parameter property on InterpolationStyle") << endmsg;
return -1;
}
Evoral::Parameter p = EventTypeMap::instance().from_symbol (prop->value());
if ((prop = (*i)->property (X_("style"))) == 0) {
error << _("Missing style property on InterpolationStyle") << endmsg;
return -1;
}
Evoral::ControlList::InterpolationStyle s = static_cast<Evoral::ControlList::InterpolationStyle>(
string_2_enum (prop->value(), s));
set_interpolation_of (p, s);
} else if ((*i)->name() == X_("AutomationState")) {
if ((prop = (*i)->property (X_("parameter"))) == 0) {
error << _("Missing parameter property on AutomationState") << endmsg;
return -1;
}
Evoral::Parameter p = EventTypeMap::instance().from_symbol (prop->value());
if ((prop = (*i)->property (X_("state"))) == 0) {
error << _("Missing state property on AutomationState") << endmsg;
return -1;
}
AutoState s = static_cast<AutoState> (string_2_enum (prop->value(), s));
set_automation_state_of (p, s);
}
}
return 0;
}
bool
MidiSource::empty () const
{
return !_length_beats;
}
framecnt_t
MidiSource::length (framepos_t pos) const
{
if (!_length_beats) {
return 0;
}
BeatsFramesConverter converter(_session.tempo_map(), pos);
return converter.to(_length_beats);
}
void
MidiSource::update_length (framecnt_t)
{
// You're not the boss of me!
}
void
MidiSource::invalidate (const Lock& lock, std::set<Evoral::Sequence<Evoral::Beats>::WeakNotePtr>* notes)
{
_model_iter_valid = false;
_model_iter.invalidate(notes);
}
framecnt_t
MidiSource::midi_read (const Lock& lm,
Evoral::EventSink<framepos_t>& dst,
framepos_t source_start,
framepos_t start,
framecnt_t cnt,
MidiStateTracker* tracker,
MidiChannelFilter* filter,
const std::set<Evoral::Parameter>& filtered) const
{
BeatsFramesConverter converter(_session.tempo_map(), source_start);
DEBUG_TRACE (DEBUG::MidiSourceIO,
string_compose ("MidiSource::midi_read() %5 sstart %1 start %2 cnt %3 tracker %4\n",
source_start, start, cnt, tracker, name()));
if (_model) {
// Find appropriate model iterator
Evoral::Sequence<Evoral::Beats>::const_iterator& i = _model_iter;
const bool linear_read = _last_read_end != 0 && start == _last_read_end;
if (!linear_read || !_model_iter_valid) {
#if 0
// Cached iterator is invalid, search for the first event past start
i = _model->begin(converter.from(start), false, filtered,
linear_read ? &_model->active_notes() : NULL);
_model_iter_valid = true;
if (!linear_read) {
_model->active_notes().clear();
}
#else
/* hot-fix http://tracker.ardour.org/view.php?id=6541
* "parallel playback of linked midi regions -> no note-offs"
*
* A midi source can be used by multiple tracks simultaneously,
* in which case midi_read() may be called from different tracks for
* overlapping time-ranges.
*
* However there is only a single iterator for a given midi-source.
* This results in every midi_read() performing a seek.
*
* If seeking is performed with
* _model->begin(converter.from(start),...)
* the model is used for seeking. That method seeks to the first
* *note-on* event after 'start'.
*
* _model->begin(converter.from( ) ,..) eventually calls
* Sequence<Time>::const_iterator() in libs/evoral/src/Sequence.cpp
* which looks up the note-event via seq.note_lower_bound(t);
* but the sequence 'seq' only contains note-on events(!).
* note-off events are implicit in Sequence<Time>::operator++()
* via _active_notes.pop(); and not part of seq.
*
* see also http://tracker.ardour.org/view.php?id=6287#c16671
*
* The linear search below assures that reading starts at the first
* event for the given time, regardless of its event-type.
*
* The performance of this approach is O(N), while the previous
* implementation is O(log(N)). This needs to be optimized:
* The model-iterator or event-sequence needs to be re-designed in
* some way (maybe keep an iterator per playlist).
*/
for (i = _model->begin(); i != _model->end(); ++i) {
const framecnt_t time_frames = converter.to(i->time());
if (time_frames >= start) {
break;
}
}
_model_iter_valid = true;
#endif
}
_last_read_end = start + cnt;
// Copy events in [start, start + cnt) into dst
for (; i != _model->end(); ++i) {
const framecnt_t time_frames = converter.to(i->time());
if (time_frames < start + cnt) {
if (filter && filter->filter(i->buffer(), i->size())) {
DEBUG_TRACE (DEBUG::MidiSourceIO,
string_compose ("%1: filter event @ %2 type %3 size %4\n",
_name, time_frames + source_start, i->event_type(), i->size()));
continue;
}
// Offset by source start to convert event time to session time
dst.write (time_frames + source_start, i->event_type(), i->size(), i->buffer());
DEBUG_TRACE (DEBUG::MidiSourceIO,
string_compose ("%1: add event @ %2 type %3 size %4\n",
_name, time_frames + source_start, i->event_type(), i->size()));
if (tracker) {
tracker->track (*i);
}
} else {
DEBUG_TRACE (DEBUG::MidiSourceIO,
string_compose ("%1: reached end with event @ %2 vs. %3\n",
_name, time_frames, start+cnt));
break;
}
}
return cnt;
} else {
return read_unlocked (lm, dst, source_start, start, cnt, tracker, filter);
}
}
framecnt_t
MidiSource::midi_write (const Lock& lm,
MidiRingBuffer<framepos_t>& source,
framepos_t source_start,
framecnt_t cnt)
{
const framecnt_t ret = write_unlocked (lm, source, source_start, cnt);
if (cnt == max_framecnt) {
_last_read_end = 0;
invalidate(lm);
} else {
_capture_length += cnt;
}
return ret;
}
void
MidiSource::mark_streaming_midi_write_started (const Lock& lock, NoteMode mode)
{
if (_model) {
_model->set_note_mode (mode);
_model->start_write ();
}
_writing = true;
}
void
MidiSource::mark_write_starting_now (framecnt_t position,
framecnt_t capture_length,
framecnt_t loop_length)
{
/* I'm not sure if this is the best way to approach this, but
_capture_length needs to be set up with the transport frame
when a record actually starts, as it is used by
SMFSource::write_unlocked to decide whether incoming notes
are within the correct time range.
mark_streaming_midi_write_started (perhaps a more logical
place to do this) is not called at exactly the time when
record starts, and I don't think it necessarily can be
because it is not RT-safe.
*/
set_timeline_position(position);
_capture_length = capture_length;
_capture_loop_length = loop_length;
BeatsFramesConverter converter(_session.tempo_map(), position);
_length_beats = converter.from(capture_length);
}
void
MidiSource::mark_streaming_write_started (const Lock& lock)
{
NoteMode note_mode = _model ? _model->note_mode() : Sustained;
mark_streaming_midi_write_started (lock, note_mode);
}
void
MidiSource::mark_midi_streaming_write_completed (const Lock& lock,
Evoral::Sequence<Evoral::Beats>::StuckNoteOption option,
Evoral::Beats end)
{
if (_model) {
_model->end_write (option, end);
/* Make captured controls discrete to play back user input exactly. */
for (MidiModel::Controls::iterator i = _model->controls().begin(); i != _model->controls().end(); ++i) {
if (i->second->list()) {
i->second->list()->set_interpolation(Evoral::ControlList::Discrete);
_interpolation_style.insert(std::make_pair(i->second->parameter(), Evoral::ControlList::Discrete));
}
}
}
invalidate(lock);
_writing = false;
}
void
MidiSource::mark_streaming_write_completed (const Lock& lock)
{
mark_midi_streaming_write_completed (lock, Evoral::Sequence<Evoral::Beats>::DeleteStuckNotes);
}
int
MidiSource::write_to (const Lock& lock, boost::shared_ptr<MidiSource> newsrc, Evoral::Beats begin, Evoral::Beats end)
{
Lock newsrc_lock (newsrc->mutex ());
newsrc->set_timeline_position (_timeline_position);
newsrc->copy_interpolation_from (this);
newsrc->copy_automation_state_from (this);
if (_model) {
if (begin == Evoral::MinBeats && end == Evoral::MaxBeats) {
_model->write_to (newsrc, newsrc_lock);
} else {
_model->write_section_to (newsrc, newsrc_lock, begin, end);
}
} else {
error << string_compose (_("programming error: %1"), X_("no model for MidiSource during ::clone()"));
return -1;
}
newsrc->flush_midi(newsrc_lock);
/* force a reload of the model if the range is partial */
if (begin != Evoral::MinBeats || end != Evoral::MaxBeats) {
newsrc->load_model (newsrc_lock, true);
} else {
newsrc->set_model (newsrc_lock, _model);
}
/* this file is not removable (but since it is MIDI, it is mutable) */
boost::dynamic_pointer_cast<FileSource> (newsrc)->prevent_deletion ();
return 0;
}
void
MidiSource::session_saved()
{
Lock lm (_lock);
/* this writes a copy of the data to disk.
XXX do we need to do this every time?
*/
if (_model && _model->edited()) {
/* The model is edited, write its contents into the current source
file (overwiting previous contents). */
/* Temporarily drop our reference to the model so that as the model
pushes its current state to us, we don't try to update it. */
boost::shared_ptr<MidiModel> mm = _model;
_model.reset ();
/* Flush model contents to disk. */
mm->sync_to_source (lm);
/* Reacquire model. */
_model = mm;
} else {
flush_midi(lm);
}
}
void
MidiSource::set_note_mode(const Lock& lock, NoteMode mode)
{
if (_model) {
_model->set_note_mode(mode);
}
}
void
MidiSource::drop_model (const Lock& lock)
{
_model.reset();
invalidate(lock);
ModelChanged (); /* EMIT SIGNAL */
}
void
MidiSource::set_model (const Lock& lock, boost::shared_ptr<MidiModel> m)
{
_model = m;
invalidate(lock);
ModelChanged (); /* EMIT SIGNAL */
}
Evoral::ControlList::InterpolationStyle
MidiSource::interpolation_of (Evoral::Parameter p) const
{
InterpolationStyleMap::const_iterator i = _interpolation_style.find (p);
if (i == _interpolation_style.end()) {
return EventTypeMap::instance().interpolation_of (p);
}
return i->second;
}
AutoState
MidiSource::automation_state_of (Evoral::Parameter p) const
{
AutomationStateMap::const_iterator i = _automation_state.find (p);
if (i == _automation_state.end()) {
/* default to `play', otherwise if MIDI is recorded /
imported with controllers etc. they are by default
not played back, which is a little surprising.
*/
return Play;
}
return i->second;
}
/** Set interpolation style to be used for a given parameter. This change will be
* propagated to anyone who needs to know.
*/
void
MidiSource::set_interpolation_of (Evoral::Parameter p, Evoral::ControlList::InterpolationStyle s)
{
if (interpolation_of (p) == s) {
return;
}
if (EventTypeMap::instance().interpolation_of (p) == s) {
/* interpolation type is being set to the default, so we don't need a note in our map */
_interpolation_style.erase (p);
} else {
_interpolation_style[p] = s;
}
InterpolationChanged (p, s); /* EMIT SIGNAL */
}
void
MidiSource::set_automation_state_of (Evoral::Parameter p, AutoState s)
{
if (automation_state_of (p) == s) {
return;
}
if (s == Play) {
/* automation state is being set to the default, so we don't need a note in our map */
_automation_state.erase (p);
} else {
_automation_state[p] = s;
}
AutomationStateChanged (p, s); /* EMIT SIGNAL */
}
void
MidiSource::copy_interpolation_from (boost::shared_ptr<MidiSource> s)
{
copy_interpolation_from (s.get ());
}
void
MidiSource::copy_automation_state_from (boost::shared_ptr<MidiSource> s)
{
copy_automation_state_from (s.get ());
}
void
MidiSource::copy_interpolation_from (MidiSource* s)
{
_interpolation_style = s->_interpolation_style;
/* XXX: should probably emit signals here */
}
void
MidiSource::copy_automation_state_from (MidiSource* s)
{
_automation_state = s->_automation_state;
/* XXX: should probably emit signals here */
}
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