interpretcommand.cpp

LINUX下的混音软件

        double proportion =
            (double(e->getAbsoluteTime() - hairpinStartTime) /
             double(hairpinEndTime - hairpinStartTime));
        long velocity =
            int((endingVelocity - startingVelocity) * proportion +
                startingVelocity);

        NOTATION_DEBUG << "InterpretCommand::applyHairpins: velocity of note at " << e->getAbsoluteTime() << " is " << velocity << " (" << proportion << " through hairpin from " << startingVelocity << " to " << endingVelocity << ")" << endl;
        if (velocity < 10)
            velocity = 10;
        if (velocity > 127)
            velocity = 127;
        e->set
        <Int>(VELOCITY, velocity);
        velocityToApply = velocity;
    }
}

void
InterpretCommand::stressBeats()
{
    Composition *c = getSegment().getComposition();

    for (EventSelection::eventcontainer::iterator itr =
                m_selection->getSegmentEvents().begin();
            itr != m_selection->getSegmentEvents().end(); ++itr) {

        Event *e = *itr;
        if (!e->isa(Note::EventType))
            continue;

        timeT t = e->getNotationAbsoluteTime();
        TimeSignature timeSig = c->getTimeSignatureAt(t);
        timeT barStart = getSegment().getBarStartForTime(t);
        int stress = timeSig.getEmphasisForTime(t - barStart);

        // stresses are from 0 to 4, so we add 12% to the velocity
        // at the maximum stress, subtract 4% at the minimum
        int velocityChange = stress * 4 - 4;

        // do this even if velocityChange == 0, in case the event
        // has no velocity yet
        long velocity = 100;
        e->get
        <Int>(VELOCITY, velocity);
        velocity += velocity * velocityChange / 100;
        if (velocity < 10)
            velocity = 10;
        if (velocity > 127)
            velocity = 127;
        e->set
        <Int>(VELOCITY, velocity);
    }
}

void
InterpretCommand::articulate()
{
    // Basic articulations:
    //
    // -- Anything marked tenuto or within a slur gets 100% of its
    //    nominal duration (that's what we need the quantizer for,
    //    to get the display nominal duration), and its velocity
    //    is unchanged.
    //
    // -- Anything marked marcato gets 60%, or 70% if slurred (!),
    //    and gets an extra 15% of velocity.
    //
    // -- Anything marked staccato gets 55%, or 70% if slurred,
    //    and unchanged velocity.
    //
    // -- Anything marked staccatissimo gets 30%, or 50% if slurred (!),
    //    and loses 5% of velocity.
    //
    // -- Anything marked sforzando gains 35% of velocity.
    //
    // -- Anything marked with an accent gains 30% of velocity.
    //
    // -- Anything marked rinforzando gains 15% of velocity and has
    //    its full duration.  Guess we really need to use some proper
    //    controllers here.
    //
    // -- Anything marked down-bow gains 5% of velocity, anything
    //    marked up-bow loses 5%.
    //
    // -- Anything unmarked and unslurred, or marked tenuto and
    //    slurred, gets 90% of duration.

    std::set
        <Event *> toErase;
    std::set
        <Event *> toInsert;
    Segment &segment(getSegment());

    for (EventSelection::eventcontainer::iterator ecitr =
                m_selection->getSegmentEvents().begin();
            ecitr != m_selection->getSegmentEvents().end(); ++ecitr) {

        Event *e = *ecitr;
        if (!e->isa(Note::EventType))
            continue;
        Segment::iterator itr = segment.findSingle(e);
        Chord chord(segment, itr, m_quantizer);

        // the things that affect duration
        bool staccato = false;
        bool staccatissimo = false;
        bool marcato = false;
        bool tenuto = false;
        bool rinforzando = false;
        bool slurred = false;

        int velocityChange = 0;

        std::vector<Mark> marks(chord.getMarksForChord());

        for (std::vector<Mark>::iterator i = marks.begin();
                i != marks.end(); ++i) {

            if (*i == Marks::Accent) {
                velocityChange += 30;
            } else if (*i == Marks::Tenuto) {
                tenuto = true;
            } else if (*i == Marks::Staccato) {
                staccato = true;
            } else if (*i == Marks::Staccatissimo) {
                staccatissimo = true;
                velocityChange -= 5;
            } else if (*i == Marks::Marcato) {
                marcato = true;
                velocityChange += 15;
            } else if (*i == Marks::Sforzando) {
                velocityChange += 35;
            } else if (*i == Marks::Rinforzando) {
                rinforzando = true;
                velocityChange += 15;
            } else if (*i == Marks::DownBow) {
                velocityChange += 5;
            } else if (*i == Marks::UpBow) {
                velocityChange -= 5;
            }
        }

        IndicationMap::iterator inditr =
            findEnclosingIndication(e, Indication::Slur);

        if (inditr != m_indications.end())
            slurred = true;
        if (slurred) {
            // last note in a slur should be treated as if unslurred
            timeT slurEnd =
                inditr->first + inditr->second->getIndicationDuration();
            if (slurEnd == e->getNotationAbsoluteTime() + e->getNotationDuration() ||
                    slurEnd == e->getAbsoluteTime() + e->getDuration()) {
                slurred = false;
            }
            /*!!!
            	    Segment::iterator slurEndItr = segment.findTime(slurEnd);
            	    if (slurEndItr != segment.end() &&
            		(*slurEndItr)->getNotationAbsoluteTime() <=
            		            e->getNotationAbsoluteTime()) {
            		slurred = false;
            	    } 
            */
        }

        int durationChange = 0;

        if (slurred) {
            //!!! doesn't seem to be picking up slurs correctly
            if (tenuto)
                durationChange = -10;
            else if (marcato || staccato)
                durationChange = -30;
            else if (staccatissimo)
                durationChange = -50;
            else
                durationChange = 0;
        } else {
            if (tenuto)
                durationChange = 0;
            else if (marcato)
                durationChange = -40;
            else if (staccato)
                durationChange = -45;
            else if (staccatissimo)
                durationChange = -70;
            else if (rinforzando)
                durationChange = 0;
            else
                durationChange = -10;
        }

        NOTATION_DEBUG << "InterpretCommand::modifySegment: chord has " << chord.size() << " notes in it" << endl;

        for (Chord::iterator ci = chord.begin();
                ci != chord.end(); ++ci) {

            e = **ci;

            NOTATION_DEBUG << "InterpretCommand::modifySegment: For note at " << e->getAbsoluteTime() << ", velocityChange is " << velocityChange << " and durationChange is " << durationChange << endl;

            // do this even if velocityChange == 0, in case the event
            // has no velocity yet
            long velocity = 100;
            e->get
            <Int>(VELOCITY, velocity);
            velocity += velocity * velocityChange / 100;
            if (velocity < 10)
                velocity = 10;
            if (velocity > 127)
                velocity = 127;
            e->set
            <Int>(VELOCITY, velocity);

            timeT duration = e->getNotationDuration();

            // don't mess with the duration of a tied note
            bool tiedForward = false;
            if (e->get
                    <Bool>(TIED_FORWARD, tiedForward) && tiedForward) {
                durationChange = 0;
            }

            timeT newDuration = duration + duration * durationChange / 100;

            // this comparison instead of "durationChange != 0"
            // because we want to permit the possibility of resetting
            // the performance duration of a note (that's perhaps been
            // articulated wrongly) based on the notation duration:

            if (e->getDuration() != newDuration) {

                if (toErase.find(e) == toErase.end()) {

                    //!!! deal with tuplets

                    Event *newEvent = new Event(*e,
                                                e->getAbsoluteTime(),
                                                newDuration,
                                                e->getSubOrdering(),
                                                e->getNotationAbsoluteTime(),
                                                duration);
                    toInsert.insert(newEvent);
                    toErase.insert(e);
                }
            }
        }

        // what we want to do here is jump our iterator to the final
        // element in the chord -- but that doesn't work because we're
        // iterating through the selection, not the segment.  So for
        // now we just accept the fact that notes in chords might be
        // processed multiple times (slow) and added into the toErase
        // set more than once (hence the nasty tests in the loop just
        // after the close of this loop).
    }

    for (std::set
                <Event *>::iterator j = toErase.begin(); j != toErase.end(); ++j) {
            Segment::iterator jtr(segment.findSingle(*j));
            if (jtr != segment.end())
                segment.erase(jtr);
        }

    for (std::set
                <Event *>::iterator j = toInsert.begin(); j != toInsert.end(); ++j) {
            segment.insert(*j);
        }
}

InterpretCommand::IndicationMap::iterator

InterpretCommand::findEnclosingIndication(Event *e,
        std::string type)
{
    // a bit slow, but let's wait and see whether it's a bottleneck
    // before we worry about that

    timeT t = e->getAbsoluteTime();
    IndicationMap::iterator itr = m_indications.lower_bound(t);

    while (1) {
        if (itr != m_indications.end()) {

            if (itr->second->getIndicationType() == type &&
                    itr->first <= t &&
                    itr->first + itr->second->getIndicationDuration() > t) {
                return itr;
            }
        }
        if (itr == m_indications.begin())
            break;
        --itr;
    }

    return m_indications.end();
}

}