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livetrax/libs/surfaces/midi_surface/midi_surface.cc

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/*
* Copyright (C) 2022 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 "pbd/debug.h"
#include "pbd/i18n.h"
#include "ardour/async_midi_port.h"
#include "ardour/audioengine.h"
#include "ardour/bundle.h"
#include "ardour/debug.h"
#include "ardour/midiport_manager.h"
#include "ardour/midi_port.h"
#include "ardour/session.h"
#include "midi_surface.h"
using namespace ARDOUR;
using namespace Glib;
using namespace PBD;
#include "pbd/abstract_ui.cc" // instantiate template
MIDISurface::MIDISurface (ARDOUR::Session& s, std::string const & namestr, std::string const & port_prefix, bool use_pad_filter)
: ControlProtocol (s, namestr)
, AbstractUI<MidiSurfaceRequest> (namestr)
, with_pad_filter (use_pad_filter)
, _in_use (false)
, port_name_prefix (port_prefix)
, _connection_state (ConnectionState (0))
{
}
MIDISurface::~MIDISurface ()
{
/* leave it all up to derived classes, because ordering it hard. */
}
void
MIDISurface::port_setup ()
{
ports_acquire ();
ARDOUR::AudioEngine::instance()->PortRegisteredOrUnregistered.connect (port_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::port_registration_handler, this), this);
ARDOUR::AudioEngine::instance()->PortConnectedOrDisconnected.connect (port_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::connection_handler, this, _1, _2, _3, _4, _5), this);
port_registration_handler ();
}
void
MIDISurface::drop ()
{
/* do this before stopping the event loop, so that we don't get any notifications */
port_connections.drop_connections ();
stop_using_device ();
device_release ();
ports_release ();
}
int
MIDISurface::ports_acquire ()
{
DEBUG_TRACE (DEBUG::MIDISurface, "acquiring ports\n");
/* setup ports */
_async_in = AudioEngine::instance()->register_input_port (DataType::MIDI, string_compose (X_("%1 in"), port_name_prefix), true);
_async_out = AudioEngine::instance()->register_output_port (DataType::MIDI, string_compose (X_("%1 out"), port_name_prefix), true);
if (_async_in == 0 || _async_out == 0) {
DEBUG_TRACE (DEBUG::MIDISurface, "cannot register ports\n");
return -1;
}
/* We do not add our ports to the input/output bundles because we don't
* want users wiring them by hand. They could use JACK tools if they
* really insist on that (and use JACK)
*/
_input_port = boost::dynamic_pointer_cast<AsyncMIDIPort>(_async_in).get();
_output_port = boost::dynamic_pointer_cast<AsyncMIDIPort>(_async_out).get();
/* Create a shadow port where, depending on the state of the surface,
* we will make pad note on/off events appear. The surface code will
* automatically this port to the first selected MIDI track.
*/
if (with_pad_filter) {
boost::dynamic_pointer_cast<AsyncMIDIPort>(_async_in)->add_shadow_port (string_compose (_("%1 Pads"), port_name_prefix), boost::bind (&MIDISurface::pad_filter, this, _1, _2));
boost::shared_ptr<MidiPort> shadow_port = boost::dynamic_pointer_cast<AsyncMIDIPort>(_async_in)->shadow_port();
if (shadow_port) {
_output_bundle.reset (new ARDOUR::Bundle (_("Push 2 Pads"), false));
_output_bundle->add_channel (
shadow_port->name(),
ARDOUR::DataType::MIDI,
session->engine().make_port_name_non_relative (shadow_port->name())
);
}
}
session->BundleAddedOrRemoved ();
connect_to_parser ();
/* Connect input port to event loop */
AsyncMIDIPort* asp;
asp = dynamic_cast<AsyncMIDIPort*> (_input_port);
asp->xthread().set_receive_handler (sigc::bind (sigc::mem_fun (this, &MIDISurface::midi_input_handler), _input_port));
asp->xthread().attach (main_loop()->get_context());
return 0;
}
void
MIDISurface::ports_release ()
{
DEBUG_TRACE (DEBUG::MIDISurface, "releasing ports\n");
/* wait for button data to be flushed */
AsyncMIDIPort* asp;
asp = dynamic_cast<AsyncMIDIPort*> (_output_port);
asp->drain (10000, 500000);
{
Glib::Threads::Mutex::Lock em (AudioEngine::instance()->process_lock());
AudioEngine::instance()->unregister_port (_async_in);
AudioEngine::instance()->unregister_port (_async_out);
}
_async_in.reset ((ARDOUR::Port*) 0);
_async_out.reset ((ARDOUR::Port*) 0);
_input_port = 0;
_output_port = 0;
}
void
MIDISurface::port_registration_handler ()
{
if (!_async_in || !_async_out) {
/* ports not registered yet */
return;
}
if (_async_in->connected() && _async_out->connected()) {
/* don't waste cycles here */
return;
}
std::vector<std::string> in;
std::vector<std::string> out;
AudioEngine::instance()->get_ports (string_compose (".*%1", input_port_name()), DataType::MIDI, PortFlags (IsPhysical|IsOutput), in);
AudioEngine::instance()->get_ports (string_compose (".*%1", output_port_name()), DataType::MIDI, PortFlags (IsPhysical|IsInput), out);
if (!in.empty() && !out.empty()) {
if (!_async_in->connected()) {
AudioEngine::instance()->connect (_async_in->name(), in.front());
}
if (!_async_out->connected()) {
AudioEngine::instance()->connect (_async_out->name(), out.front());
}
}
}
bool
MIDISurface::connection_handler (boost::weak_ptr<ARDOUR::Port>, std::string name1, boost::weak_ptr<ARDOUR::Port>, std::string name2, bool yn)
{
DEBUG_TRACE (DEBUG::MIDISurface, "FaderPort::connection_handler start\n");
if (!_input_port || !_output_port) {
return false;
}
std::string ni = ARDOUR::AudioEngine::instance()->make_port_name_non_relative (boost::shared_ptr<ARDOUR::Port>(_async_in)->name());
std::string no = ARDOUR::AudioEngine::instance()->make_port_name_non_relative (boost::shared_ptr<ARDOUR::Port>(_async_out)->name());
if (ni == name1 || ni == name2) {
if (yn) {
_connection_state |= InputConnected;
} else {
_connection_state &= ~InputConnected;
}
} else if (no == name1 || no == name2) {
if (yn) {
_connection_state |= OutputConnected;
} else {
_connection_state &= ~OutputConnected;
}
} else {
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("Connections between %1 and %2 changed, but I ignored it\n", name1, name2));
/* not our ports */
return false;
}
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("our ports changed connection state: %1 -> %2 connected ? %3\n",
name1, name2, yn));
if ((_connection_state & (InputConnected|OutputConnected)) == (InputConnected|OutputConnected)) {
/* XXX this is a horrible hack. Without a short sleep here,
something prevents the device wakeup messages from being
sent and/or the responses from being received.
*/
g_usleep (100000);
DEBUG_TRACE (DEBUG::MIDISurface, "device now connected for both input and output\n");
/* may not have the device open if it was just plugged
in. Really need USB device detection rather than MIDI port
detection for this to work well.
*/
device_acquire ();
begin_using_device ();
} else {
DEBUG_TRACE (DEBUG::MIDISurface, "Device disconnected (input or output or both) or not yet fully connected\n");
stop_using_device ();
}
ConnectionChange (); /* emit signal for our GUI */
DEBUG_TRACE (DEBUG::MIDISurface, "connection_handler end\n");
return true; /* connection status changed */
}
boost::shared_ptr<Port>
MIDISurface::output_port()
{
return _async_out;
}
boost::shared_ptr<Port>
MIDISurface::input_port()
{
return _async_in;
}
void
MIDISurface::write (const MidiByteArray& data)
{
/* immediate delivery */
_output_port->write (&data[0], data.size(), 0);
}
bool
MIDISurface::midi_input_handler (IOCondition ioc, MIDI::Port* port)
{
if (ioc & ~IO_IN) {
DEBUG_TRACE (DEBUG::MIDISurface, "MIDI port closed\n");
return false;
}
if (ioc & IO_IN) {
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("something happened on %1\n", port->name()));
AsyncMIDIPort* asp = dynamic_cast<AsyncMIDIPort*>(port);
if (asp) {
asp->clear ();
}
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("data available on %1\n", port->name()));
if (_in_use) {
samplepos_t now = AudioEngine::instance()->sample_time();
port->parse (now);
}
}
return true;
}
void
MIDISurface::connect_to_parser ()
{
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("Connecting to signals on port %2\n", _input_port->name()));
MIDI::Parser* p = _input_port->parser();
/* Incoming sysex */
p->sysex.connect_same_thread (*this, boost::bind (&MIDISurface::handle_midi_sysex, this, _1, _2, _3));
/* V-Pot messages are Controller */
p->controller.connect_same_thread (*this, boost::bind (&MIDISurface::handle_midi_controller_message, this, _1, _2));
/* Button messages are NoteOn */
p->note_on.connect_same_thread (*this, boost::bind (&MIDISurface::handle_midi_note_on_message, this, _1, _2));
/* Button messages are NoteOn but libmidi++ sends note-on w/velocity = 0 as note-off so catch them too */
p->note_off.connect_same_thread (*this, boost::bind (&MIDISurface::handle_midi_note_on_message, this, _1, _2));
/* Fader messages are Pitchbend */
p->channel_pitchbend[0].connect_same_thread (*this, boost::bind (&MIDISurface::handle_midi_pitchbend_message, this, _1, _2));
}
void
MIDISurface::thread_init ()
{
pthread_set_name (event_loop_name().c_str());
PBD::notify_event_loops_about_thread_creation (pthread_self(), event_loop_name(), 2048);
ARDOUR::SessionEvent::create_per_thread_pool (event_loop_name(), 128);
set_thread_priority ();
}
void
MIDISurface::connect_session_signals()
{
// receive routes added
//session->RouteAdded.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MackieControlProtocol::notify_routes_added, this, _1), this);
// receive VCAs added
//session->vca_manager().VCAAdded.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_vca_added, this, _1), this);
// receive record state toggled
session->RecordStateChanged.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_record_state_changed, this), this);
// receive transport state changed
session->TransportStateChange.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_transport_state_changed, this), this);
session->TransportLooped.connect (session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_loop_state_changed, this), this);
// receive punch-in and punch-out
Config->ParameterChanged.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_parameter_changed, this, _1), this);
session->config.ParameterChanged.connect (session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_parameter_changed, this, _1), this);
// receive rude solo changed
session->SoloActive.connect(session_connections, MISSING_INVALIDATOR, boost::bind (&MIDISurface::notify_solo_active_changed, this, _1), this);
}
XMLNode&
MIDISurface::get_state() const
{
XMLNode& node (ControlProtocol::get_state());
XMLNode* child;
child = new XMLNode (X_("Input"));
child->add_child_nocopy (_async_in->get_state());
node.add_child_nocopy (*child);
child = new XMLNode (X_("Output"));
child->add_child_nocopy (_async_out->get_state());
node.add_child_nocopy (*child);
return node;
}
int
MIDISurface::set_state (const XMLNode & node, int version)
{
DEBUG_TRACE (DEBUG::MIDISurface, string_compose ("MIDISurface::set_state: active %1\n", active()));
if (ControlProtocol::set_state (node, version)) {
return -1;
}
XMLNode* child;
if ((child = node.child (X_("Input"))) != 0) {
XMLNode* portnode = child->child (Port::state_node_name.c_str());
if (portnode) {
portnode->remove_property ("name");
_async_in->set_state (*portnode, version);
}
}
if ((child = node.child (X_("Output"))) != 0) {
XMLNode* portnode = child->child (Port::state_node_name.c_str());
if (portnode) {
portnode->remove_property ("name");
_async_out->set_state (*portnode, version);
}
}
return 0;
}
void
MIDISurface::do_request (MidiSurfaceRequest * req)
{
if (req->type == CallSlot) {
call_slot (MISSING_INVALIDATOR, req->the_slot);
} else if (req->type == Quit) {
stop_using_device ();
}
}
int
MIDISurface::begin_using_device ()
{
_in_use = true;
connect_session_signals ();
return 0;
}
int
MIDISurface::stop_using_device ()
{
session_connections.drop_connections ();
_in_use = false;
return 0;
}
std::list<boost::shared_ptr<ARDOUR::Bundle> >
MIDISurface::bundles ()
{
std::list<boost::shared_ptr<ARDOUR::Bundle> > b;
if (_output_bundle) {
b.push_back (_output_bundle);
}
return b;
}
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