rosegarden/src/sequencer/main.cpp

/*
  Rosegarden
  A sequencer and musical notation editor.
 
  This program is Copyright 2000-2008
  Guillaume Laurent   <glaurent@telegraph-road.org>,
  Chris Cannam        <cannam@all-day-breakfast.com>,
  Richard Bown        <bownie@bownie.com>
 
  The moral right of the authors to claim authorship of this work
  has been asserted.
 
  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.  See the file
  COPYING included with this distribution for more information.
*/

#include "RosegardenSequencerApp.h"

#include <signal.h>
#include <iostream>
#include <unistd.h>
#include <sys/time.h>

#include <tdecmdlineargs.h>
#include <tdeaboutdata.h>
#include <tdelocale.h>
#include <dcopclient.h>

#include "base/Profiler.h"
#include "sound/MappedComposition.h"

#include "gui/application/RosegardenDCOP.h"
#include "misc/Debug.h"

using std::cout;
using std::cerr;
using std::endl;

using namespace Rosegarden;

static const char *description = I18N_NOOP("RosegardenSequencer");
static RosegardenSequencerApp *roseSeq = 0;

static TDECmdLineOptions options[] =
    {
        //        { "+[File]", I18N_NOOP("file to open"), 0 },
        // INSERT YOUR COMMANDLINE OPTIONS HERE
        { "+[playback_1 playback_2 capture_1 capture_2]",
          I18N_NOOP("JACK playback and capture ports"), 0 },
        { 0, 0, 0 }
    };

static bool _exiting = false;
static sigset_t _signals;

static void
signalHandler(int /*sig*/)
{
    _exiting = true;
    std::cerr << "Is that the time!?" << endl;
}

int main(int argc, char *argv[])
{
    srandom((unsigned int)time(0) * (unsigned int)getpid());

    // Block signals during startup, so that child threads (inheriting
    // this mask) ignore them; then after startup we can unblock them
    // for this thread only.  This trick picked up from the jackd code.
    sigemptyset (&_signals);
    sigaddset(&_signals, SIGHUP);
    sigaddset(&_signals, SIGINT);
    sigaddset(&_signals, SIGQUIT);
    sigaddset(&_signals, SIGPIPE);
    sigaddset(&_signals, SIGTERM);
    sigaddset(&_signals, SIGUSR1);
    sigaddset(&_signals, SIGUSR2);
    pthread_sigmask(SIG_BLOCK, &_signals, 0);

    TDEAboutData aboutData( "rosegardensequencer",
                          I18N_NOOP("RosegardenSequencer"),
                          VERSION, description, TDEAboutData::License_GPL,
                          "(c) 2000-2008, Guillaume Laurent, Chris Cannam, Richard Bown");
    aboutData.addAuthor("Guillaume Laurent, Chris Cannam, Richard Bown", 0, "glaurent@telegraph-road.org, cannam@all-day-breakfast.com, bownie@bownie.com");
    TDECmdLineArgs::init( argc, argv, &aboutData );
    TDECmdLineArgs::addCmdLineOptions( options ); // Add our own options.

    // Parse cmd line args
    //
    /*TDECmdLineArgs *args =*/
    TDECmdLineArgs::parsedArgs();
    TDEApplication app;

    if (app.isRestored()) {
        SEQUENCER_DEBUG << "RosegardenSequencer - we're being session-restored - that's not supposed to happen\n";
        app.quit(); // don't do session restore -- GUI will start a sequencer
    } else {
        roseSeq = new RosegardenSequencerApp;
    }

    TQObject::connect(&app, TQ_SIGNAL(lastWindowClosed()), &app, TQ_SLOT(quit()));

    app.disableSessionManagement(); // we don't want to be
    // saved/restored by session
    // management, only run by the GUI

    // Started OK
    //
    SEQUENCER_DEBUG << "RosegardenSequencer - started OK" << endl;

    // Register signal handlers and unblock signals
    //
    signal(SIGINT, signalHandler);
    signal(SIGTERM, signalHandler);
    signal(SIGHUP, signalHandler);
    signal(SIGQUIT, signalHandler);
    pthread_sigmask(SIG_UNBLOCK, &_signals, 0);

    // Now we can enter our specialised event loop.
    // For each pass through we wait for some pending
    // events.  We check status on the way through and
    // act accordingly.  DCOP events fire back and
    // forth processed in the event loop changing
    // state and hopefully controlling and providing
    // feedback.  We also put in some sleep time to
    // make sure the loop doesn't eat up all the
    // processor - we're not in that much of a rush!
    //
    TransportStatus lastSeqStatus = roseSeq->getStatus();

    RealTime sleepTime = RealTime(0, 10000000);

    while (!_exiting && roseSeq && roseSeq->getStatus() != QUIT) {

        bool atLeisure = true;

        switch (roseSeq->getStatus()) {
        case STARTING_TO_PLAY:
            if (!roseSeq->startPlaying()) {
                // send result failed and stop Sequencer
                roseSeq->setStatus(STOPPING);
            } else {
                roseSeq->setStatus(PLAYING);
            }
            break;

        case PLAYING:
            if (!roseSeq->keepPlaying()) {
                // there's a problem or the piece has
                // finished - so stop playing
                roseSeq->setStatus(STOPPING);
            } else {
                // process any async events
                //
                roseSeq->processAsynchronousEvents();
            }
            break;

        case STARTING_TO_RECORD:
            if (!roseSeq->startPlaying()) {
                roseSeq->setStatus(STOPPING);
            } else {
                roseSeq->setStatus(RECORDING);
            }
            break;

        case RECORDING:
            if (!roseSeq->keepPlaying()) {
                // there's a problem or the piece has
                // finished - so stop playing
                roseSeq->setStatus(STOPPING);
            } else {
                // Now process any incoming MIDI events
                // and return them to the gui
                //
                roseSeq->processRecordedMidi();

                // Now process any incoming audio
                // and return it to the gui
                //
                roseSeq->processRecordedAudio();

                // Still process these so we can send up
                // audio levels as MappedEvents
                //
                roseSeq->processAsynchronousEvents();
            }
            break;

        case STOPPING:
            // There's no call to roseSeq to actually process the
            // stop, because this arises from a DCOP call from the GUI
            // direct to roseSeq to start with
            roseSeq->setStatus(STOPPED);
            SEQUENCER_DEBUG << "RosegardenSequencer - Stopped" << endl;
            break;

        case RECORDING_ARMED:
            SEQUENCER_DEBUG << "RosegardenSequencer - "
            << "Sequencer can't enter \""
            << "RECORDING_ARMED\" state - "
            << "internal error"
            << endl;
            break;

        case STOPPED:
        default:
            roseSeq->processAsynchronousEvents();
            break;
        }

        // Update internal clock and send pointer position
        // change event to GUI - this is the heartbeat of
        // the Sequencer - it doesn't tick over without
        // this call.
        //
        // Also attempt to send the MIDI clock at this point.
        //
        roseSeq->updateClocks();

        // we want to process transport changes immediately
        if (roseSeq->checkExternalTransport()) {
            atLeisure = false;
        } else if (lastSeqStatus != roseSeq->getStatus()) {
            SEQUENCER_DEBUG << "Sequencer status changed from " << lastSeqStatus << " to " << roseSeq->getStatus() << endl;
            roseSeq->notifySequencerStatus();
            lastSeqStatus = roseSeq->getStatus();
            atLeisure = false;
        }

        app.processEvents();
        if (atLeisure)
            roseSeq->sleep(sleepTime);
    }

    delete roseSeq;

    std::cerr << "Toodle-pip." << endl;
    return 0;
}