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livetrax/libs/surfaces/generic_midi/generic_midi_control_protocol.cc

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/*
Copyright (C) 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
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.
*/
#define __STDC_FORMAT_MACROS 1
#include <stdint.h>
#include <algorithm>
#include <pbd/error.h>
#include <pbd/failed_constructor.h>
#include <midi++/port.h>
#include <midi++/manager.h>
#include <ardour/route.h>
#include <ardour/session.h>
#include "generic_midi_control_protocol.h"
#include "midicontrollable.h"
using namespace ARDOUR;
using namespace PBD;
#include "i18n.h"
GenericMidiControlProtocol::GenericMidiControlProtocol (Session& s)
: ControlProtocol (s, _("Generic MIDI"))
{
MIDI::Manager* mm = MIDI::Manager::instance();
/* XXX it might be nice to run "control" through i18n, but thats a bit tricky because
the name is defined in ardour.rc which is likely not internationalized.
*/
_port = mm->port (X_("control"));
if (_port == 0) {
error << _("no MIDI port named \"control\" exists - generic MIDI control disabled") << endmsg;
throw failed_constructor();
}
do_feedback = false;
_feedback_interval = 10000; // microseconds
last_feedback_time = 0;
auto_binding = FALSE;
Controllable::StartLearning.connect (mem_fun (*this, &GenericMidiControlProtocol::start_learning));
Controllable::StopLearning.connect (mem_fun (*this, &GenericMidiControlProtocol::stop_learning));
Session::SendFeedback.connect (mem_fun (*this, &GenericMidiControlProtocol::send_feedback));
Controllable::CreateBinding.connect (mem_fun (*this, &GenericMidiControlProtocol::create_binding));
Controllable::DeleteBinding.connect (mem_fun (*this, &GenericMidiControlProtocol::delete_binding));
Session::AutoBindingOn.connect (mem_fun (*this, &GenericMidiControlProtocol::auto_binding_on));
Session::AutoBindingOff.connect (mem_fun (*this, &GenericMidiControlProtocol::auto_binding_off));
}
GenericMidiControlProtocol::~GenericMidiControlProtocol ()
{
}
int
GenericMidiControlProtocol::set_active (bool yn)
{
/* start/stop delivery/outbound thread */
return 0;
}
void
GenericMidiControlProtocol::set_feedback_interval (microseconds_t ms)
{
_feedback_interval = ms;
}
void
GenericMidiControlProtocol::send_feedback ()
{
if (!do_feedback) {
return;
}
microseconds_t now = get_microseconds ();
if (last_feedback_time != 0) {
if ((now - last_feedback_time) < _feedback_interval) {
return;
}
}
_send_feedback ();
last_feedback_time = now;
}
void
GenericMidiControlProtocol::_send_feedback ()
{
const int32_t bufsize = 16 * 1024; /* XXX too big */
MIDI::byte buf[bufsize];
int32_t bsize = bufsize;
MIDI::byte* end = buf;
for (MIDIControllables::iterator r = controllables.begin(); r != controllables.end(); ++r) {
end = (*r)->write_feedback (end, bsize);
}
if (end == buf) {
return;
}
_port->write (buf, (int32_t) (end - buf), 0);
}
bool
GenericMidiControlProtocol::start_learning (Controllable* c)
{
if (c == 0) {
return false;
}
MIDIControllables::iterator tmp;
for (MIDIControllables::iterator i = controllables.begin(); i != controllables.end(); ) {
tmp = i;
++tmp;
if (&(*i)->get_controllable() == c) {
delete (*i);
controllables.erase (i);
}
i = tmp;
}
MIDIPendingControllables::iterator ptmp;
for (MIDIPendingControllables::iterator i = pending_controllables.begin(); i != pending_controllables.end(); ) {
ptmp = i;
++ptmp;
if (&((*i).first)->get_controllable() == c) {
(*i).second.disconnect();
delete (*i).first;
pending_controllables.erase (i);
}
i = ptmp;
}
MIDIControllable* mc = 0;
for (MIDIControllables::iterator i = controllables.begin(); i != controllables.end(); ++i) {
if ((*i)->get_controllable().id() == c->id()) {
mc = *i;
break;
}
}
if (!mc) {
mc = new MIDIControllable (*_port, *c);
}
{
Glib::Mutex::Lock lm (pending_lock);
std::pair<MIDIControllable *, sigc::connection> element;
element.first = mc;
element.second = c->LearningFinished.connect (bind (mem_fun (*this, &GenericMidiControlProtocol::learning_stopped), mc));
pending_controllables.push_back (element);
}
mc->learn_about_external_control ();
return true;
}
void
GenericMidiControlProtocol::learning_stopped (MIDIControllable* mc)
{
Glib::Mutex::Lock lm (pending_lock);
Glib::Mutex::Lock lm2 (controllables_lock);
MIDIPendingControllables::iterator tmp;
for (MIDIPendingControllables::iterator i = pending_controllables.begin(); i != pending_controllables.end(); ) {
tmp = i;
++tmp;
if ( (*i).first == mc) {
(*i).second.disconnect();
pending_controllables.erase(i);
}
i = tmp;
}
controllables.insert (mc);
}
void
GenericMidiControlProtocol::stop_learning (Controllable* c)
{
Glib::Mutex::Lock lm (pending_lock);
Glib::Mutex::Lock lm2 (controllables_lock);
MIDIControllable* dptr = 0;
/* learning timed out, and we've been told to consider this attempt to learn to be cancelled. find the
relevant MIDIControllable and remove it from the pending list.
*/
for (MIDIPendingControllables::iterator i = pending_controllables.begin(); i != pending_controllables.end(); ++i) {
if (&((*i).first)->get_controllable() == c) {
(*i).first->stop_learning ();
dptr = (*i).first;
(*i).second.disconnect();
pending_controllables.erase (i);
break;
}
}
delete dptr;
}
void
GenericMidiControlProtocol::delete_binding (PBD::Controllable* control)
{
if (control != 0) {
Glib::Mutex::Lock lm2 (controllables_lock);
for (MIDIControllables::iterator iter = controllables.begin(); iter != controllables.end(); ++iter) {
MIDIControllable* existingBinding = (*iter);
if (control == &(existingBinding->get_controllable())) {
delete existingBinding;
controllables.erase (iter);
}
}
}
}
void
GenericMidiControlProtocol::create_binding (PBD::Controllable* control, int pos, int control_number)
{
if (control != NULL) {
Glib::Mutex::Lock lm2 (controllables_lock);
MIDI::channel_t channel = (pos & 0xf);
MIDI::byte value = control_number;
// Create a MIDIControllable
MIDIControllable* mc = new MIDIControllable (*_port, *control);
// Remove any old binding for this midi channel/type/value pair
// Note: can't use delete_binding() here because we don't know the specific controllable we want to remove, only the midi information
for (MIDIControllables::iterator iter = controllables.begin(); iter != controllables.end(); ++iter) {
MIDIControllable* existingBinding = (*iter);
if ((existingBinding->get_control_channel() & 0xf ) == channel &&
existingBinding->get_control_additional() == value &&
(existingBinding->get_control_type() & 0xf0 ) == MIDI::controller) {
delete existingBinding;
controllables.erase (iter);
}
}
// Update the MIDI Controllable based on the the pos param
// Here is where a table lookup for user mappings could go; for now we'll just wing it...
mc->bind_midi(channel, MIDI::controller, value);
controllables.insert (mc);
}
}
void
GenericMidiControlProtocol::auto_binding_on()
{
auto_binding = TRUE;
}
void
GenericMidiControlProtocol::auto_binding_off()
{
auto_binding = FALSE;
}
XMLNode&
GenericMidiControlProtocol::get_state ()
{
XMLNode* node = new XMLNode ("Protocol");
char buf[32];
node->add_property (X_("name"), _name);
node->add_property (X_("feedback"), do_feedback ? "1" : "0");
snprintf (buf, sizeof (buf), "%" PRIu64, _feedback_interval);
node->add_property (X_("feedback_interval"), buf);
XMLNode* children = new XMLNode (X_("controls"));
node->add_child_nocopy (*children);
Glib::Mutex::Lock lm2 (controllables_lock);
for (MIDIControllables::iterator i = controllables.begin(); i != controllables.end(); ++i) {
children->add_child_nocopy ((*i)->get_state());
}
return *node;
}
int
GenericMidiControlProtocol::set_state (const XMLNode& node)
{
XMLNodeList nlist;
XMLNodeConstIterator niter;
const XMLProperty* prop;
if ((prop = node.property ("feedback")) != 0) {
do_feedback = (bool) atoi (prop->value().c_str());
} else {
do_feedback = false;
}
if ((prop = node.property ("feedback_interval")) != 0) {
if (sscanf (prop->value().c_str(), "%" PRIu64, &_feedback_interval) != 1) {
_feedback_interval = 10000;
}
} else {
_feedback_interval = 10000;
}
if ( !auto_binding ) {
boost::shared_ptr<Controllable> c;
{
Glib::Mutex::Lock lm (pending_lock);
pending_controllables.clear ();
}
Glib::Mutex::Lock lm2 (controllables_lock);
controllables.clear ();
nlist = node.children(); // "controls"
if (nlist.empty()) {
return 0;
}
nlist = nlist.front()->children ();
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((prop = (*niter)->property ("id")) != 0) {
ID id = prop->value ();
c = session->controllable_by_id (id);
if (c) {
MIDIControllable* mc = new MIDIControllable (*_port, *c);
if (mc->set_state (**niter) == 0) {
controllables.insert (mc);
}
} else {
warning << string_compose (
_("Generic MIDI control: controllable %1 not found in session (ignored)"),
id) << endmsg;
}
}
}
}
return 0;
}
int
GenericMidiControlProtocol::set_feedback (bool yn)
{
do_feedback = yn;
last_feedback_time = 0;
return 0;
}
bool
GenericMidiControlProtocol::get_feedback () const
{
return do_feedback;
}