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/*
* Copyright (C) 2016 The Qt Company Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "playlistwithmetadata.h"
#include <QtCore/QDebug>
#include <QtCore/QBuffer>
#include <QtGui/QImage>
#include <QtGui/QImageWriter>
#include <QtMultimedia/QMediaPlayer>
#include <QtMultimedia/QMediaMetaData>
class PlaylistWithMetadata::Private
{
public:
Private(PlaylistWithMetadata *parent);
void disconnect();
void connect();
private:
void loadMetadata(int row);
private:
PlaylistWithMetadata *q;
public:
QAbstractListModel *source;
QList<QMetaObject::Connection> connections;
QList<QUrl> urls;
QHash<QUrl, QString> title;
QHash<QUrl, QString> artist;
QHash<QUrl, QUrl> coverArt;
QHash<QUrl, qint64> duration;
QHash<QUrl, QMediaPlayer *> players;
};
PlaylistWithMetadata::Private::Private(PlaylistWithMetadata *parent)
: q(parent)
, source(nullptr)
{
}
void PlaylistWithMetadata::Private::disconnect()
{
if (source) {
for (const auto &connection : connections)
q->disconnect(connection);
connections.clear();
}
}
void PlaylistWithMetadata::Private::connect()
{
if (source) {
connections.append(q->connect(source, &QAbstractListModel::rowsAboutToBeInserted, [&](const QModelIndex &parent, int first, int last) {
Q_UNUSED(parent)
q->beginInsertRows(QModelIndex(), first, last);
}));
connections.append(q->connect(source, &QAbstractListModel::rowsInserted, [&](const QModelIndex &parent, int first, int last) {
Q_UNUSED(parent)
for (int i = first; i <= last; i++) {
loadMetadata(i);
}
q->endInsertRows();
}));
int count = source->rowCount();
if (count > 0) {
q->beginInsertRows(QModelIndex(), 0, count);
for (int i = 0; i < count; i++) {
loadMetadata(i);
}
q->endInsertRows();
}
}
}
void PlaylistWithMetadata::Private::loadMetadata(int row)
{
QUrl url = source->data(source->index(row), Qt::UserRole + 1).toUrl();
QMediaPlayer *player = new QMediaPlayer(q);
urls.append(url);
players.insert(url, player);
q->connect(player, &QMediaPlayer::mediaStatusChanged, [this, url](QMediaPlayer::MediaStatus mediaStatus) {
switch (mediaStatus) {
case QMediaPlayer::NoMedia:
case QMediaPlayer::LoadedMedia: {
QMediaPlayer *player = players.take(url);
title.insert(url, player->metaData(QMediaMetaData::Title).toString());
artist.insert(url, player->metaData(QMediaMetaData::ContributingArtist).toString());
QVariant coverArtImage = player->metaData(QMediaMetaData::CoverArtImage);
if (coverArtImage.type() == QVariant::Image) {
QImage image = coverArtImage.value<QImage>();
QByteArray data;
QBuffer buffer(&data);
buffer.open(QBuffer::WriteOnly);
QImageWriter png(&buffer, "png");
if (png.write(image)) {
buffer.close();
coverArt.insert(url, QUrl(QStringLiteral("data:image/png;base64,") + data.toBase64()));
}
}
duration.insert(url, player->duration());
QModelIndex index = q->index(urls.indexOf(url));
q->dataChanged(index, index, QVector<int>() << TitleRole << ArtistRole << CoverArtRole << DurationRole);
player->deleteLater();
break; }
default:
break;
}
});
player->setMedia(url);
}
PlaylistWithMetadata::PlaylistWithMetadata(QObject *parent)
: QAbstractListModel(parent)
, d(new Private(this))
{
}
PlaylistWithMetadata::~PlaylistWithMetadata()
{
delete d;
}
int PlaylistWithMetadata::rowCount(const QModelIndex &parent) const
{
int ret = 0;
if (parent.isValid())
return ret;
if (d->source)
ret = d->source->rowCount(QModelIndex());
return ret;
}
QVariant PlaylistWithMetadata::data(const QModelIndex &index, int role) const
{
QVariant ret;
if (!index.isValid())
return ret;
int row = index.row();
if (row < 0 || rowCount() <= row)
return ret;
QUrl url = d->urls.at(row);
switch (role) {
case TitleRole:
ret = d->title.value(url);
break;
case ArtistRole:
ret = d->artist.value(url);
break;
case CoverArtRole:
ret = d->coverArt.value(url);
break;
case SourceRole:
ret = url;
break;
case DurationRole:
ret = d->duration.value(url);
break;
default:
qWarning() << role;
}
return ret;
}
QHash<int, QByteArray> PlaylistWithMetadata::roleNames() const
{
return {
{TitleRole, "title"},
{ArtistRole, "artist"},
{CoverArtRole, "coverArt"},
{SourceRole, "source"},
{DurationRole, "duration"}
};
}
QAbstractListModel *PlaylistWithMetadata::source() const
{
return d->source;
}
void PlaylistWithMetadata::setSource(QAbstractListModel *source)
{
if (d->source == source) return;
d->disconnect();
d->source = source;
d->connect();
emit sourceChanged(source);
}
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