view data/model/AggregateWaveModel.cpp @ 335:02d2ad95ea52 spectrogram-cache-rejig

* Get storage advice for each cache in an FFT data server.  Allows us to be
  more confident about the actual memory situation and cut over from memory
  to disc part way through an FFT calculation if necessary.  StorageAdviser
  is now a bit too optimistic though (it's too keen to allocate large numbers
  of small blocks in memory).

/* -*- 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()) {
            std::cerr << "AggregateWaveModel::AggregateWaveModel: WARNING: Component models do not all have the same sample rate" << std::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;
}

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

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

    return count;
}

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

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

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

size_t
AggregateWaveModel::getData(int channel, size_t start, size_t 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 (size_t i = 0; i < count; ++i) {
            buffer[i] = 0.f;
        }
    }

    size_t sz = count;

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

    if (mixing) delete[] readbuf;
    return sz;
}
         
size_t
AggregateWaveModel::getData(int channel, size_t start, size_t 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 (size_t i = 0; i < count; ++i) {
            buffer[i] = 0.0;
        }
    }

    size_t sz = count;
    
    for (int c = ch0; c <= ch1; ++c) {
        size_t szHere = 
            m_components[c].model->getData(m_components[c].channel,
                                           start, count,
                                           readbuf);
        if (szHere < sz) sz = szHere;
        if (mixing) {
            for (size_t i = 0; i < count; ++i) {
                buffer[i] += readbuf[i];
            }
        }
    }
    
    if (mixing) delete[] readbuf;
    return sz;
}
        
void
AggregateWaveModel::getSummaries(size_t channel, size_t start, size_t count,
                                 RangeBlock &ranges, size_t &blockSize) const
{
    //!!! complete
}

AggregateWaveModel::Range
AggregateWaveModel::getSummary(size_t channel, size_t start, size_t count) const
{
    //!!! complete
    return Range();
}
        
size_t
AggregateWaveModel::getComponentCount() const
{
    return m_components.size();
}

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

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

void
AggregateWaveModel::componentModelChanged(size_t start, size_t end)
{
    emit modelChanged(start, end);
}

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

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