view data/fileio/DecodingWavFileReader.cpp @ 1376:d9511f9e04d7 dev/refactor-piper-related

Introduce some POD structs for describing an external server application and the desired libraries to load from it, and disambiguating between empty list request and invalid list request. This allows for overriding PiperVampPluginFactory behaviour for using a PluginScan to populate the list request.

/* -*- 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>

using namespace std;

DecodingWavFileReader::DecodingWavFileReader(FileSource source,
                                             DecodeMode decodeMode,
                                             CacheMode mode,
                                             sv_samplerate_t 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)
{
    SVDEBUG << "DecodingWavFileReader: local path: \"" << m_path
            << "\", decode mode: " << decodeMode << " ("
            << (decodeMode == DecodeAtOnce ? "DecodeAtOnce" : "DecodeThreaded")
            << ")" << endl;

    m_channelCount = 0;
    m_fileRate = 0;

    Profiler profiler("DecodingWavFileReader::DecodingWavFileReader");

    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 (decodeMode == DecodeAtOnce) {

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

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

        floatvec_t block;

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

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

            block = m_original->getInterleavedFrames(i, count);
            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");
    }

    sv_frame_t blockSize = 16384;
    sv_frame_t total = m_reader->m_original->getFrameCount();
    
    floatvec_t block;
    
    for (sv_frame_t i = 0; i < total; i += blockSize) {
        
        sv_frame_t count = blockSize;
        if (i + count > total) count = total - i;
        
        block = m_reader->m_original->getInterleavedFrames(i, count);
        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 floatvec_t &frames)
{
    addSamplesToDecodeCache(frames);

    m_processed += frames.size();

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

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

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

void
DecodingWavFileReader::getSupportedExtensions(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);
}