annotate data/fileio/ResamplingWavFileReader.cpp @ 360:ac300d385ab2

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 "ResamplingWavFileReader.h"

#include "WavFileReader.h"
#include "base/Profiler.h"

#include <QProgressDialog>
#include <QFileInfo>
#include <QApplication>

ResamplingWavFileReader::ResamplingWavFileReader(FileSource source,
						 ResampleMode resampleMode,
						 CacheMode mode,
						 size_t targetRate) :
    CodedAudioFileReader(mode, targetRate),
    m_source(source),
    m_path(source.getLocalFilename()),
    m_cancelled(false),
    m_processed(0),
    m_completion(0),
    m_original(0),
    m_progress(0),
    m_decodeThread(0)
{
    m_channelCount = 0;
    m_fileRate = 0;

    std::cerr << "ResamplingWavFileReader::ResamplingWavFileReader(\""
              << m_path.toStdString() << "\"): rate " << targetRate << std::endl;

    Profiler profiler("ResamplingWavFileReader::ResamplingWavFileReader", true);

    m_original = new WavFileReader(m_path);
    if (!m_original->isOK()) {
        m_error = m_original->getError();
        return;
    }

    m_channelCount = m_original->getChannelCount();
    m_fileRate = m_original->getSampleRate();

    initialiseDecodeCache();

    if (resampleMode == ResampleAtOnce) {

        if (dynamic_cast<QApplication *>(QCoreApplication::instance())) {
            m_progress = new QProgressDialog
                (QObject::tr("Resampling %1...").arg(QFileInfo(m_path).fileName()),
                 QObject::tr("Stop"), 0, 100);
            m_progress->hide();
        }

        size_t blockSize = 16384;
        size_t total = m_original->getFrameCount();

        SampleBlock block;

        for (size_t i = 0; i < total; i += blockSize) {

            size_t count = blockSize;
            if (i + count > total) count = total - i;

            m_original->getInterleavedFrames(i, count, block);
            addBlock(block);

            if (m_cancelled) break;
        }

        if (isDecodeCacheInitialised()) finishDecodeCache();

        delete m_original;
        m_original = 0;

        delete m_progress;
        m_progress = 0;

    } else {

        m_decodeThread = new DecodeThread(this);
        m_decodeThread->start();
    }
}

ResamplingWavFileReader::~ResamplingWavFileReader()
{
    if (m_decodeThread) {
        m_cancelled = true;
        m_decodeThread->wait();
        delete m_decodeThread;
    }
    
    delete m_original;
}

void
ResamplingWavFileReader::DecodeThread::run()
{
    if (m_reader->m_cacheMode == CacheInTemporaryFile) {
        m_reader->startSerialised("ResamplingWavFileReader::Decode");
    }

    size_t blockSize = 16384;
    size_t total = m_reader->m_original->getFrameCount();
    
    SampleBlock block;
    
    for (size_t i = 0; i < total; i += blockSize) {
        
        size_t count = blockSize;
        if (i + count > total) count = total - i;
        
        m_reader->m_original->getInterleavedFrames(i, count, block);
        m_reader->addBlock(block);

        if (m_reader->m_cancelled) break;
    }
    
    if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache();
    m_reader->m_completion = 100;

    m_reader->endSerialised();

    delete m_reader->m_original;
    m_reader->m_original = 0;
} 

void
ResamplingWavFileReader::addBlock(const SampleBlock &frames)
{
    addSamplesToDecodeCache(frames);

    m_processed += frames.size();

    int progress = lrint((float(m_processed) * 100) /
                         float(m_original->getFrameCount()));

    if (progress > 99) progress = 99;
    m_completion = progress;
    
    if (m_progress) {
	if (progress > m_progress->value()) {
	    m_progress->setValue(progress);
	    m_progress->show();
	    m_progress->raise();
	    qApp->processEvents();
	    if (m_progress->wasCanceled()) {
		m_cancelled = true;
	    }
	}
    }
}

void
ResamplingWavFileReader::getSupportedExtensions(std::set<QString> &extensions)
{
    WavFileReader::getSupportedExtensions(extensions);
}

bool
ResamplingWavFileReader::supportsExtension(QString extension)
{
    return WavFileReader::supportsExtension(extension);
}

bool
ResamplingWavFileReader::supportsContentType(QString type)
{
    return WavFileReader::supportsContentType(type);
}

bool
ResamplingWavFileReader::supports(FileSource &source)
{
    return WavFileReader::supports(source);
}