/home/marsyas/marsyas/src/marsyas/PitchDiff.cpp

/*
** Copyright (C) 1998-2010 George Tzanetakis <gtzan@cs.uvic.ca>
**
** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include "PitchDiff.h"

using std::ostringstream;
using namespace Marsyas;

PitchDiff::PitchDiff(mrs_string name) : MarSystem("PitchDiff", name)
{
    addControls();
}

PitchDiff::PitchDiff(const PitchDiff& a) : MarSystem(a)
{
    ctrl_expectedPitch_ = getctrl("mrs_real/expectedPitch");
    ctrl_ignoreOctaves_ = getctrl("mrs_bool/ignoreOctaves");
    ctrl_absoluteValue_ = getctrl("mrs_bool/absoluteValue");
}


PitchDiff::~PitchDiff()
{
}

MarSystem*
PitchDiff::clone() const
{
    return new PitchDiff(*this);
}

void
PitchDiff::addControls()
{
    addctrl("mrs_real/expectedPitch", 440.0, ctrl_expectedPitch_);
    addctrl("mrs_bool/ignoreOctaves", false, ctrl_ignoreOctaves_);
    addctrl("mrs_bool/absoluteValue", false, ctrl_absoluteValue_);
    setctrlState("mrs_real/expectedPitch", true);
}

void
PitchDiff::myUpdate(MarControlPtr sender)
{
    MRSDIAG("PitchDiff.cpp - PitchDiff:myUpdate");

    MarSystem::myUpdate(sender);

    // Add prefix to the observation names.
    mrs_string inObsNames = ctrl_inObsNames_->to<mrs_string>();
    ctrl_onObsNames_->setValue(obsNamesAddPrefix(inObsNames, "PitchDiff_"), 
                               NOUPDATE);

    expectedMidiPitch_ = hertz2pitch(ctrl_expectedPitch_->to<mrs_real>());
}

void
PitchDiff::myProcess(realvec& in, realvec& out)
{
    for (o = 0; o < inObservations_; o++)
    {
        // we should only have one sample input

        // convert to midi
        mrs_real in_midi = hertz2pitch(in(o,0));
        // difference in midi
        mrs_real diff = in_midi - expectedMidiPitch_;
        if (ctrl_ignoreOctaves_->isTrue()) {
            diff = fmod(diff, 12.0);
            // seeing -1.5 is much more intuitive than
            // seeing 9.5.
            if (diff > 6) {
                diff -= 12.0;
            }
            if (diff < -6) {
                diff += 12.0;
            }
        }
        if (ctrl_absoluteValue_->isTrue()) {
            diff = fabs(diff);
        }
        out(o, 0) = diff;
    }
}

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