view data/model/AggregateWaveModel.cpp @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2007 QMUL.
    
    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 "AggregateWaveModel.h"

#include <iostream>

#include <QTextStream>

PowerOfSqrtTwoZoomConstraint
AggregateWaveModel::m_zoomConstraint;

AggregateWaveModel::AggregateWaveModel(ChannelSpecList channelSpecs) :
    m_components(channelSpecs)
{
    for (ChannelSpecList::const_iterator i = channelSpecs.begin();
         i != channelSpecs.end(); ++i) {
        if (i->model->getSampleRate() !=
            channelSpecs.begin()->model->getSampleRate()) {
            SVDEBUG << "AggregateWaveModel::AggregateWaveModel: WARNING: Component models do not all have the same sample rate" << endl;
            break;
        }
    }
}

AggregateWaveModel::~AggregateWaveModel()
{
}

bool
AggregateWaveModel::isOK() const
{
    for (ChannelSpecList::const_iterator i = m_components.begin();
         i != m_components.end(); ++i) {
        if (!i->model->isOK()) return false;
    }
    return true;
}

bool
AggregateWaveModel::isReady(int *completion) const
{
    if (completion) *completion = 100;
    bool ready = true;
    for (ChannelSpecList::const_iterator i = m_components.begin();
         i != m_components.end(); ++i) {
        int completionHere = 100;
        if (!i->model->isReady(&completionHere)) ready = false;
        if (completion && completionHere < *completion) {
            *completion = completionHere;
        }
    }
    return ready;
}

int
AggregateWaveModel::getFrameCount() const
{
    int count = 0;

    for (ChannelSpecList::const_iterator i = m_components.begin();
         i != m_components.end(); ++i) {
        int thisCount = i->model->getEndFrame() - i->model->getStartFrame();
        if (thisCount > count) count = thisCount;
    }

    return count;
}

int
AggregateWaveModel::getChannelCount() const
{
    return m_components.size();
}

int
AggregateWaveModel::getSampleRate() const
{
    if (m_components.empty()) return 0;
    return m_components.begin()->model->getSampleRate();
}

Model *
AggregateWaveModel::clone() const
{
    return new AggregateWaveModel(m_components);
}

int
AggregateWaveModel::getData(int channel, int start, int count,
                            float *buffer) const
{
    int ch0 = channel, ch1 = channel;
    bool mixing = false;
    if (channel == -1) {
        ch0 = 0;
        ch1 = getChannelCount()-1;
        mixing = true;
    }

    float *readbuf = buffer;
    if (mixing) {
        readbuf = new float[count];
        for (int i = 0; i < count; ++i) {
            buffer[i] = 0.f;
        }
    }

    int longest = 0;
    
    for (int c = ch0; c <= ch1; ++c) {
        int here = 
            m_components[c].model->getData(m_components[c].channel,
                                           start, count,
                                           readbuf);
        if (here > longest) {
            longest = here;
        }
        if (here < count) {
            for (int i = here; i < count; ++i) {
                readbuf[i] = 0.f;
            }
        }
        if (mixing) {
            for (int i = 0; i < count; ++i) {
                buffer[i] += readbuf[i];
            }
        }
    }

    if (mixing) delete[] readbuf;
    return longest;
}
         
int
AggregateWaveModel::getData(int channel, int start, int count,
                            double *buffer) const
{
    int ch0 = channel, ch1 = channel;
    bool mixing = false;
    if (channel == -1) {
        ch0 = 0;
        ch1 = getChannelCount()-1;
        mixing = true;
    }

    double *readbuf = buffer;
    if (mixing) {
        readbuf = new double[count];
        for (int i = 0; i < count; ++i) {
            buffer[i] = 0.0;
        }
    }

    int longest = 0;
    
    for (int c = ch0; c <= ch1; ++c) {
        int here = 
            m_components[c].model->getData(m_components[c].channel,
                                           start, count,
                                           readbuf);
        if (here > longest) {
            longest = here;
        }
        if (here < count) {
            for (int i = here; i < count; ++i) {
                readbuf[i] = 0.;
            }
        }
        if (mixing) {
            for (int i = 0; i < count; ++i) {
                buffer[i] += readbuf[i];
            }
        }
    }
    
    if (mixing) delete[] readbuf;
    return longest;
}

int
AggregateWaveModel::getData(int fromchannel, int tochannel,
                            int start, int count,
                            float **buffer) const
{
    int min = count;

    for (int c = fromchannel; c <= tochannel; ++c) {
        int here = getData(c, start, count, buffer[c - fromchannel]);
        if (here < min) min = here;
    }
    
    return min;
}

int
AggregateWaveModel::getSummaryBlockSize(int desired) const
{
    //!!! complete
    return desired;
}
        
void
AggregateWaveModel::getSummaries(int, int, int,
                                 RangeBlock &, int &) const
{
    //!!! complete
}

AggregateWaveModel::Range
AggregateWaveModel::getSummary(int, int, int) const
{
    //!!! complete
    return Range();
}
        
int
AggregateWaveModel::getComponentCount() const
{
    return m_components.size();
}

AggregateWaveModel::ModelChannelSpec
AggregateWaveModel::getComponent(int c) const
{
    return m_components[c];
}

void
AggregateWaveModel::componentModelChanged()
{
    emit modelChanged();
}

void
AggregateWaveModel::componentModelChangedWithin(int start, int end)
{
    emit modelChangedWithin(start, end);
}

void
AggregateWaveModel::componentModelCompletionChanged()
{
    emit completionChanged();
}

void
AggregateWaveModel::toXml(QTextStream &,
                          QString ,
                          QString ) const
{
    //!!! complete
}