midi_ui.cc

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/*
  Copyright (C) 2009 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.

*/
#include <cstdlib>

#include <sigc++/signal.h>

#include "pbd/pthread_utils.h"

#include "ardour/async_midi_port.h"
#include "ardour/debug.h"
#include "ardour/audioengine.h"
#include "ardour/midi_port.h"
#include "ardour/midiport_manager.h"
#include "ardour/midi_ui.h"
#include "ardour/session.h"
#include "ardour/session_event.h"
#include "ardour/types.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Glib;

#include "i18n.h"

MidiControlUI* MidiControlUI::_instance = 0;

#include "pbd/abstract_ui.cc"  /* instantiate the template */

MidiControlUI::MidiControlUI (Session& s)
        : AbstractUI<MidiUIRequest> (X_("midiui"))
        , _session (s)
{
        _instance = this;
}

MidiControlUI::~MidiControlUI ()
{
        /* stop the thread */
        quit ();
        /* drop all ports as GIO::Sources */
        clear_ports ();
        /* we no longer exist */
        _instance = 0;
}

void
MidiControlUI::do_request (MidiUIRequest* req)
{
        if (req->type == Quit) {
                BaseUI::quit ();
        } else if (req->type == CallSlot) {
                req->the_slot ();
        }
}

bool
MidiControlUI::midi_input_handler (IOCondition ioc, AsyncMIDIPort* port)
{
        DEBUG_TRACE (DEBUG::MidiIO, string_compose ("something happend on  %1\n", ((ARDOUR::Port*)port)->name()));

        if (ioc & ~IO_IN) {
                return false;
        }

        if (ioc & IO_IN) {

                AsyncMIDIPort* asp = dynamic_cast<AsyncMIDIPort*> (port);
                if (asp) {
                        asp->clear ();
                }

                DEBUG_TRACE (DEBUG::MidiIO, string_compose ("data available on %1\n", ((ARDOUR::Port*)port)->name()));
                framepos_t now = _session.engine().sample_time();
                port->parse (now);
        }

        return true;
}

void
MidiControlUI::clear_ports ()
{
}

void
MidiControlUI::reset_ports ()
{
        vector<AsyncMIDIPort*> ports;
        AsyncMIDIPort* p;
        
        if ((p = dynamic_cast<AsyncMIDIPort*> (_session.midi_input_port()))) {
                ports.push_back (p);
        }
        
        
        if ((p = dynamic_cast<AsyncMIDIPort*> (_session.mmc_input_port()))) {
                ports.push_back (p);
        }

        if ((p = dynamic_cast<AsyncMIDIPort*> (_session.scene_input_port()))) {
                ports.push_back (p);
        }
        
        if (ports.empty()) {
                return;
        }
        
        for (vector<AsyncMIDIPort*>::const_iterator pi = ports.begin(); pi != ports.end(); ++pi) {
                (*pi)->xthread().set_receive_handler (sigc::bind (sigc::mem_fun (this, &MidiControlUI::midi_input_handler), *pi));
                (*pi)->xthread().attach (_main_loop->get_context());
        }
}

void
MidiControlUI::thread_init ()
{
        struct sched_param rtparam;

        pthread_set_name (X_("midiUI"));

        PBD::notify_gui_about_thread_creation (X_("gui"), pthread_self(), X_("MIDI"), 2048);
        SessionEvent::create_per_thread_pool (X_("MIDI I/O"), 128);

        memset (&rtparam, 0, sizeof (rtparam));
        rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */

        if (pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam) != 0) {
                // do we care? not particularly.
        }

        reset_ports ();
}