SegmentDescriptors.cxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * 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 "SegmentDescriptors.hxx"
#include "Segment.hxx"

namespace CLAM
{

SegmentDescriptors::SegmentDescriptors(Segment* pSegment): Descriptor(eNumAttr)
{
        MandatoryInit();
        mpSegment=pSegment;
}

void SegmentDescriptors::DefaultInit() {
        mpSegment=0;
        mpStats=0;
        mSegmentStats=0;
        AddFramesD();
        UpdateData();
}

void SegmentDescriptors::CopyInit(const SegmentDescriptors & copied) {
        mpSegment=copied.mpSegment;
        mpStats=0;
        mSegmentStats=0;
}

const Segment* SegmentDescriptors::GetpSegment() const {
        return mpSegment;
}

void SegmentDescriptors::SetpSegment(const Segment* pSegment) {
        if (HasFramesD())
                CLAM_ASSERT(mSegmentStats,"SegmentDescriptors::SetpSegment: Frame Prototype must be set before, please call SetFramePrototype");
        mpSegment=pSegment;
        if(mpSegment->HasAudio())
        {
                //with this operation we may lose pointer reference in Stats!
                AddAudioD();
                UpdateData();
                if(HasFramesD())
                        mSegmentStats->SetArray(&GetFramesD());
        }
        if(mpSegment->HasAudio())
                GetAudioD().SetpAudio(&mpSegment->GetAudio());
        int nFrames=mpSegment->GetnFrames();
        int i;
        for (i=0;i<nFrames;i++){
                GetFramesD()[i].SetpFrame(&(mpSegment->GetFrame(i)));}
}

void SegmentDescriptors::SetFramePrototype(const FrameDescriptors& proto, int nFrames)
{
        int i;
        GetFramesD().Resize(nFrames);
        GetFramesD().SetSize(nFrames);
        for (i=0;i<nFrames;i++){
                GetFramesD()[i].SetPrototype(proto);}
        mSegmentStats= new StatsTmpl<false,FrameDescriptors,FrameDescriptors>(&GetFramesD());
        if(HasMeanD())
                GetMeanD().SetPrototype(proto);
        if(HasMaxD())
                GetMaxD().SetPrototype(proto);
        if(HasMinD())
                GetMinD().SetPrototype(proto);
        if(HasVarianceD())
                GetVarianceD().SetPrototype(proto);
}

void SegmentDescriptors::Compute()
{
        /*Overriding compute method in base class because right now I don't know
        what to do with member statistics. The best thing would be passing the list of
        FrameDescriptors as processing data but then Descriptors would have to be 
        template and I am not sure that statistics would work, I would need to add
        some operators like + on FrameDescriptors.*/
        ConcreteCompute();
}

void SegmentDescriptors::ConcreteCompute()
{
        int nFrames=mpSegment->GetnFrames();
        for (int i=0;i<nFrames;i++)
                GetFramesD()[i].Compute();
        if(HasMeanD())
                SetMeanD(mSegmentStats->GetMean());
        if(HasMaxD())
                SetMaxD(mSegmentStats->GetMax());
        if(HasMinD())
                SetMinD(mSegmentStats->GetMin());
        if(HasVarianceD())
                SetVarianceD(mSegmentStats->GetVariance());
        if(HasAudioD())
                GetAudioD().Compute();
}

} // namespace CLAM