view data/model/AggregateWaveModel.cpp @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.

/* -*- 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>

using namespace std;

PowerOfSqrtTwoZoomConstraint
AggregateWaveModel::m_zoomConstraint;

AggregateWaveModel::AggregateWaveModel(ChannelSpecList channelSpecs) :
    m_components(channelSpecs),
    m_invalidated(false)
{
    for (ChannelSpecList::const_iterator i = channelSpecs.begin();
         i != channelSpecs.end(); ++i) {

        connect(i->model, SIGNAL(aboutToBeDeleted()),
                this, SLOT(componentModelAboutToBeDeleted()));
        
        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()
{
}

void
AggregateWaveModel::componentModelAboutToBeDeleted()
{
    SVDEBUG << "AggregateWaveModel::componentModelAboutToBeDeleted: invalidating"
            << endl;
    m_components.clear();
    m_invalidated = true;
    emit modelInvalidated();
}

bool
AggregateWaveModel::isOK() const
{
    if (m_invalidated) {
        return false;
    }
    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;
}

sv_frame_t
AggregateWaveModel::getFrameCount() const
{
    sv_frame_t count = 0;
    for (ChannelSpecList::const_iterator i = m_components.begin();
         i != m_components.end(); ++i) {
        sv_frame_t thisCount =
            i->model->getEndFrame() - i->model->getStartFrame();
        if (thisCount > count) count = thisCount;
    }
    return count;
}

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

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

floatvec_t
AggregateWaveModel::getData(int channel, sv_frame_t start, sv_frame_t count) const
{
    int ch0 = channel, ch1 = channel;
    if (channel == -1) {
        ch0 = 0;
        ch1 = getChannelCount()-1;
    }

    floatvec_t result(count, 0.f);
    sv_frame_t longest = 0;
    
    for (int c = ch0; c <= ch1; ++c) {

        auto here = m_components[c].model->getData(m_components[c].channel,
                                                   start, count);
        if (sv_frame_t(here.size()) > longest) {
            longest = sv_frame_t(here.size());
        }
        for (sv_frame_t i = 0; in_range_for(here, i); ++i) {
            result[i] += here[i];
        }
    }

    result.resize(longest);
    return result;
}

vector<floatvec_t>
AggregateWaveModel::getMultiChannelData(int fromchannel, int tochannel,
                                        sv_frame_t start, sv_frame_t count) const
{
    sv_frame_t min = count;

    vector<floatvec_t> result;

    for (int c = fromchannel; c <= tochannel; ++c) {
        auto here = getData(c, start, count);
        if (sv_frame_t(here.size()) < min) {
            min = sv_frame_t(here.size());
        }
        result.push_back(here);
    }

    if (min < count) {
        for (auto &v : result) v.resize(min);
    }
    
    return result;
}

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

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

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

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

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

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

void
AggregateWaveModel::toXml(QTextStream &out,
                          QString indent,
                          QString extraAttributes) const
{
    QStringList componentStrings;
    for (const auto &c: m_components) {
        componentStrings.push_back(QString("%1").arg(getObjectExportId(c.model)));
    }
    Model::toXml(out, indent,
                 QString("type=\"aggregatewave\" components=\"%1\" %2")
                 .arg(componentStrings.join(","))
                 .arg(extraAttributes));
}