/*
* Implementation of Kronecker product.
* Eigen has an implementation of the Kronecker product,
* but it is very slow due to poor memory reservation.
* See: https://forum.kde.org/viewtopic.php?f=74&t=106955&p=309990&hilit=kronecker#p309990
* When Eigen update their implementation, and officially support it, we switch to that.
*/
SparseMatrix myKroneckerProduct(const SparseMatrix &A, const SparseMatrix &B)
{
SparseMatrix AB(A.rows()*B.rows(), A.cols()*B.cols());
// Reserve memory for AB
//AB.reserve(A.nonZeros()*B.nonZeros()); // Does not reserve inner vectors (slow)
//int innernnz = std::ceil(A.nonZeros()*B.nonZeros()/AB.outerSize());
//AB.reserve(Eigen::VectorXi::Constant(AB.outerSize(), innernnz)); // Assumes equal distribution of non-zeros (slow)
// Calculate exact number of non-zeros for each inner vector
Eigen::VectorXi nnzA = Eigen::VectorXi::Zero(A.outerSize());
Eigen::VectorXi nnzB = Eigen::VectorXi::Zero(B.outerSize());
Eigen::VectorXi nnzAB = Eigen::VectorXi::Zero(AB.outerSize());
//innerNonZeros.setZero();
for (int jA = 0; jA < A.outerSize(); ++jA)
{
int nnz = 0;
for (SparseMatrix::InnerIterator itA(A,jA); itA; ++itA) nnz++;
nnzA(jA) = nnz;
}
for (int jB = 0; jB < B.outerSize(); ++jB)
{
int nnz = 0;
for (SparseMatrix::InnerIterator itB(B,jB); itB; ++itB) nnz++;
nnzB(jB) = nnz;
}
int innz = 0;
for (int i = 0; i < nnzA.rows(); ++i)
{
for (int j = 0; j < nnzB.rows(); ++j)
{
nnzAB(innz) = nnzA(i)*nnzB(j);
innz++;
}
}
AB.reserve(nnzAB);
// Non-zero tolerance
double tolerance = std::numeric_limits<SparseMatrix::Scalar>::epsilon();
// Compute Kronecker product
for (int jA = 0; jA < A.outerSize(); ++jA)
{
for (SparseMatrix::InnerIterator itA(A,jA); itA; ++itA)
{
if (std::abs(itA.value()) > tolerance)
{
int jrow = itA.row()*B.rows();
int jcol = itA.col()*B.cols();
for (int jB = 0; jB < B.outerSize(); ++jB)
{
for (SparseMatrix::InnerIterator itB(B,jB); itB; ++itB)
{
if (std::abs(itA.value()*itB.value()) > tolerance)
{
int row = jrow + itB.row();
int col = jcol + itB.col();
AB.insert(row,col) = itA.value()*itB.value();
}
}
}
}
}
}
AB.makeCompressed();
return AB;
}
/**
* @brief Parses JSON data and assigns it to the given concert object
* Handles all types of data from TMDb (info, releases, trailers, images)
* @param json JSON data
* @param concert Concert object
* @param infos List of infos to load
*/
void TMDbConcerts::parseAndAssignInfos(QString json, Concert *concert, QList<int> infos)
{
qDebug() << "Entered";
QScriptValue sc;
QScriptEngine engine;
sc = engine.evaluate("(" + QString(json) + ")");
// Infos
if (sc.property("imdb_id").isValid() && !sc.property("imdb_id").toString().isEmpty())
concert->setId(sc.property("imdb_id").toString());
if (infos.contains(ConcertScraperInfos::Title) && sc.property("title").isValid())
concert->setName(sc.property("title").toString());
if (infos.contains(ConcertScraperInfos::Overview) && sc.property("overview").isValid() && !sc.property("overview").isNull())
concert->setOverview(sc.property("overview").toString());
if (infos.contains(ConcertScraperInfos::Rating) && sc.property("vote_average").isValid())
concert->setRating(sc.property("vote_average").toNumber());
if (infos.contains(ConcertScraperInfos::Tagline) && sc.property("tagline").isValid() && !sc.property("tagline").isNull())
concert->setTagline(sc.property("tagline").toString());
if (infos.contains(ConcertScraperInfos::Released) && sc.property("release_date").isValid())
concert->setReleased(QDate::fromString(sc.property("release_date").toString(), "yyyy-MM-dd"));
if (infos.contains(ConcertScraperInfos::Runtime) && sc.property("runtime").isValid())
concert->setRuntime(sc.property("runtime").toInteger());
if (infos.contains(ConcertScraperInfos::Genres) && sc.property("genres").isArray()) {
QScriptValueIterator itC(sc.property("genres"));
while (itC.hasNext()) {
itC.next();
QScriptValue vC = itC.value();
if (vC.property("id").toString().isEmpty())
continue;
concert->addGenre(vC.property("name").toString());
}
}
// Trailers
if (infos.contains(ConcertScraperInfos::Trailer) && sc.property("youtube").isArray()) {
QScriptValueIterator itC(sc.property("youtube"));
while (itC.hasNext()) {
itC.next();
QScriptValue vC = itC.value();
if (vC.property("source").toString().isEmpty())
continue;
concert->setTrailer(QUrl(Helper::formatTrailerUrl(QString("http://www.youtube.com/watch?v=%1").arg(vC.property("source").toString()))));
break;
}
}
// Images
if (infos.contains(ConcertScraperInfos::Backdrop) && sc.property("backdrops").isArray()) {
QScriptValueIterator itB(sc.property("backdrops"));
while (itB.hasNext()) {
itB.next();
QScriptValue vB = itB.value();
if (vB.property("file_path").toString().isEmpty())
continue;
Poster b;
b.thumbUrl = m_baseUrl + "w780" + vB.property("file_path").toString();
b.originalUrl = m_baseUrl + "original" + vB.property("file_path").toString();
b.originalSize.setWidth(vB.property("width").toString().toInt());
b.originalSize.setHeight(vB.property("height").toString().toInt());
concert->addBackdrop(b);
}
}
if (infos.contains(ConcertScraperInfos::Poster) && sc.property("posters").isArray()) {
QScriptValueIterator itB(sc.property("posters"));
while (itB.hasNext()) {
itB.next();
QScriptValue vB = itB.value();
if (vB.property("file_path").toString().isEmpty())
continue;
Poster b;
b.thumbUrl = m_baseUrl + "w342" + vB.property("file_path").toString();
b.originalUrl = m_baseUrl + "original" + vB.property("file_path").toString();
b.originalSize.setWidth(vB.property("width").toString().toInt());
b.originalSize.setHeight(vB.property("height").toString().toInt());
concert->addPoster(b);
}
}
// Releases
if (infos.contains(ConcertScraperInfos::Certification) && sc.property("countries").isArray()) {
QString locale;
QString us;
QString gb;
QScriptValueIterator itB(sc.property("countries"));
while (itB.hasNext()) {
itB.next();
QScriptValue vB = itB.value();
if (vB.property("iso_3166_1").toString() == "US")
us = vB.property("certification").toString();
if (vB.property("iso_3166_1").toString() == "GB")
gb = vB.property("certification").toString();
if (vB.property("iso_3166_1").toString().toLower() == m_language)
locale = vB.property("certification").toString();
}
if (!locale.isEmpty())
concert->setCertification(locale);
else if (!us.isEmpty())
concert->setCertification(us);
else if (!gb.isEmpty())
concert->setCertification(gb);
}
}
