view data/fileio/DecodingWavFileReader.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 "DecodingWavFileReader.h"

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

#include <QFileInfo>

DecodingWavFileReader::DecodingWavFileReader(FileSource source,
                                             ResampleMode resampleMode,
                                             CacheMode mode,
                                             int targetRate,
                                             bool normalised,
                                             ProgressReporter *reporter) :
    CodedAudioFileReader(mode, targetRate, normalised),
    m_source(source),
    m_path(source.getLocalFilename()),
    m_cancelled(false),
    m_processed(0),
    m_completion(0),
    m_original(0),
    m_reporter(reporter),
    m_decodeThread(0)
{
    m_channelCount = 0;
    m_fileRate = 0;

    SVDEBUG << "DecodingWavFileReader::DecodingWavFileReader(\""
              << m_path << "\"): rate " << targetRate << endl;

    Profiler profiler("DecodingWavFileReader::DecodingWavFileReader", 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 (m_reporter) {
            connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled()));
            m_reporter->setMessage
                (tr("Decoding %1...").arg(QFileInfo(m_path).fileName()));
        }

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

        SampleBlock block;

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

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

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

            if (m_cancelled) break;
        }

        if (isDecodeCacheInitialised()) finishDecodeCache();
        endSerialised();

        if (m_reporter) m_reporter->setProgress(100);

        delete m_original;
        m_original = 0;

    } else {

        if (m_reporter) m_reporter->setProgress(100);

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

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

void
DecodingWavFileReader::cancelled()
{
    m_cancelled = true;
}

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

    int blockSize = 16384;
    int total = m_reader->m_original->getFrameCount();
    
    SampleBlock block;
    
    for (int i = 0; i < total; i += blockSize) {
        
        int 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
DecodingWavFileReader::addBlock(const SampleBlock &frames)
{
    addSamplesToDecodeCache(frames);

    m_processed += frames.size();

    float ratio = float(m_sampleRate) / float(m_fileRate);

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

    if (progress > 99) progress = 99;
    m_completion = progress;
    
    if (m_reporter) {
        m_reporter->setProgress(progress);
    }
}

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

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

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

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