annotate data/model/WritableWaveFileModel.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 2006 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 "WritableWaveFileModel.h"

#include "base/TempDirectory.h"
#include "base/Exceptions.h"

#include "fileio/WavFileWriter.h"
#include "fileio/WavFileReader.h"

#include <QDir>
#include <QTextStream>

#include <cassert>
#include <iostream>
#include <stdint.h>

//#define DEBUG_WRITABLE_WAVE_FILE_MODEL 1

WritableWaveFileModel::WritableWaveFileModel(int sampleRate,
					     int channels,
					     QString path) :
    m_model(0),
    m_writer(0),
    m_reader(0),
    m_sampleRate(sampleRate),
    m_channels(channels),
    m_frameCount(0),
    m_startFrame(0),
    m_completion(0)
{
    if (path.isEmpty()) {
        try {
            QDir dir(TempDirectory::getInstance()->getPath());
            path = dir.filePath(QString("written_%1.wav")
                                .arg((intptr_t)this));
        } catch (DirectoryCreationFailed f) {
            cerr << "WritableWaveFileModel: Failed to create temporary directory" << endl;
            return;
        }
    }

    // Write directly to the target file, so that we can do
    // incremental writes and concurrent reads
    m_writer = new WavFileWriter(path, sampleRate, channels,
                                 WavFileWriter::WriteToTarget);
    if (!m_writer->isOK()) {
        cerr << "WritableWaveFileModel: Error in creating WAV file writer: " << m_writer->getError() << endl;
        delete m_writer; 
        m_writer = 0;
        return;
    }

    FileSource source(m_writer->getPath());

    m_reader = new WavFileReader(source, true);
    if (!m_reader->getError().isEmpty()) {
        cerr << "WritableWaveFileModel: Error in creating wave file reader" << endl;
        delete m_reader;
        m_reader = 0;
        return;
    }
    
    m_model = new WaveFileModel(source, m_reader);
    if (!m_model->isOK()) {
        cerr << "WritableWaveFileModel: Error in creating wave file model" << endl;
        delete m_model;
        m_model = 0;
        delete m_reader;
        m_reader = 0;
        return;
    }
    m_model->setStartFrame(m_startFrame);

    connect(m_model, SIGNAL(modelChanged()), this, SIGNAL(modelChanged()));
    connect(m_model, SIGNAL(modelChangedWithin(int, int)),
            this, SIGNAL(modelChangedWithin(int, int)));
}

WritableWaveFileModel::~WritableWaveFileModel()
{
    delete m_model;
    delete m_writer;
    delete m_reader;
}

void
WritableWaveFileModel::setStartFrame(int startFrame)
{
    m_startFrame = startFrame;
    if (m_model) m_model->setStartFrame(startFrame);
}

bool
WritableWaveFileModel::addSamples(float **samples, int count)
{
    if (!m_writer) return false;

#ifdef DEBUG_WRITABLE_WAVE_FILE_MODEL
//    SVDEBUG << "WritableWaveFileModel::addSamples(" << count << ")" << endl;
#endif

    if (!m_writer->writeSamples(samples, count)) {
        cerr << "ERROR: WritableWaveFileModel::addSamples: writer failed: " << m_writer->getError() << endl;
        return false;
    }

    m_frameCount += count;

    static int updateCounter = 0;

    if (m_reader && m_reader->getChannelCount() == 0) {
#ifdef DEBUG_WRITABLE_WAVE_FILE_MODEL
        SVDEBUG << "WritableWaveFileModel::addSamples(" << count << "): calling updateFrameCount (initial)" << endl;
#endif
        m_reader->updateFrameCount();
    } else if (++updateCounter == 100) {
#ifdef DEBUG_WRITABLE_WAVE_FILE_MODEL
        SVDEBUG << "WritableWaveFileModel::addSamples(" << count << "): calling updateFrameCount (periodic)" << endl;
#endif
        if (m_reader) m_reader->updateFrameCount();
        updateCounter = 0;
    }

    return true;
}

bool
WritableWaveFileModel::isOK() const
{
    bool ok = (m_writer && m_writer->isOK());
//    SVDEBUG << "WritableWaveFileModel::isOK(): ok = " << ok << endl;
    return ok;
}

bool
WritableWaveFileModel::isReady(int *completion) const
{
    if (completion) *completion = m_completion;
    return (m_completion == 100);
}

void
WritableWaveFileModel::setCompletion(int completion)
{
    m_completion = completion;
    if (completion == 100) {
        if (m_reader) m_reader->updateDone();
    }
}

int
WritableWaveFileModel::getFrameCount() const
{
//    SVDEBUG << "WritableWaveFileModel::getFrameCount: count = " << m_frameCount << endl;
    return m_frameCount;
}

Model *
WritableWaveFileModel::clone() const
{
    assert(0); //!!!
    return 0;
}

int
WritableWaveFileModel::getData(int channel, int start, int count,
                               float *buffer) const
{
    if (!m_model || m_model->getChannelCount() == 0) return 0;
    return m_model->getData(channel, start, count, buffer);
}

int
WritableWaveFileModel::getData(int channel, int start, int count,
                               double *buffer) const
{
    if (!m_model || m_model->getChannelCount() == 0) return 0;
    return m_model->getData(channel, start, count, buffer);
}

int
WritableWaveFileModel::getData(int fromchannel, int tochannel,
                               int start, int count,
                               float **buffers) const
{
    if (!m_model || m_model->getChannelCount() == 0) return 0;
    return m_model->getData(fromchannel, tochannel, start, count, buffers);
}    

int
WritableWaveFileModel::getSummaryBlockSize(int desired) const
{
    if (!m_model) return desired;
    return m_model->getSummaryBlockSize(desired);
}

void
WritableWaveFileModel::getSummaries(int channel, int start, int count,
                                    RangeBlock &ranges,
                                    int &blockSize) const
{
    ranges.clear();
    if (!m_model || m_model->getChannelCount() == 0) return;
    m_model->getSummaries(channel, start, count, ranges, blockSize);
}

WritableWaveFileModel::Range
WritableWaveFileModel::getSummary(int channel, int start, int count) const
{
    if (!m_model || m_model->getChannelCount() == 0) return Range();
    return m_model->getSummary(channel, start, count);
}

void
WritableWaveFileModel::toXml(QTextStream &out,
                             QString indent,
                             QString extraAttributes) const
{
    // We don't actually write the data to XML.  We just write a brief
    // description of the model.  Any code that uses this class is
    // going to need to be aware that it will have to make separate
    // arrangements for the audio file itself.

    Model::toXml
        (out, indent,
         QString("type=\"writablewavefile\" file=\"%1\" channels=\"%2\" %3")
         .arg(encodeEntities(m_writer->getPath()))
         .arg(m_model->getChannelCount()).arg(extraAttributes));
}