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harbour-sailfin/core/include/JellyfinQt/viewmodel/playbackmanager.h
2021-03-24 20:04:03 +01:00

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/*
* Sailfin: a Jellyfin client written using Qt
* Copyright (C) 2021 Chris Josten and the Sailfin Contributors.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef JELLYFIN_VIEWMODEL_PLAYBACKMANAGER_H
#define JELLYFIN_VIEWMODEL_PLAYBACKMANAGER_H
#include <QAbstractItemModel>
#include <QJsonArray>
#include <QJsonObject>
#include <QFuture>
#include <QObject>
#include <QtGlobal>
#include <QUrlQuery>
#include <QVariant>
#include <QtMultimedia/QMediaPlayer>
#include <QtMultimedia/QMediaPlaylist>
#include <functional>
#include "../dto/baseitemdto.h"
#include "../support/jsonconv.h"
#include "../viewmodel/item.h"
#include "../apiclient.h"
namespace Jellyfin {
// Forward declaration of Jellyfin::ApiClient found in jellyfinapiclient.h
class ApiClient;
class ItemModel;
class RemoteItem;
namespace ViewModel {
/**
* @brief The PlaybackManager class manages the playback of Jellyfin items. It fetches streams based on Jellyfin items, posts
* the current playback state to the Jellyfin Server, contains the actual media player and so on.
*
* The PlaybackManager actually keeps two mediaPlayers, m_mediaPlayer1 and m_mediaPlayer2. When one is playing, the other is
* preloading the next item in the queue. The current media player is pointed to by m_mediaPlayer.
*/
class PlaybackManager : public QObject, public QQmlParserStatus {
Q_OBJECT
Q_INTERFACES(QQmlParserStatus)
public:
enum PlayMethod {
Transcode,
Stream,
DirectPlay
};
Q_ENUM(PlayMethod)
using FetchCallback = std::function<void(QUrl &&, PlayMethod)>;
explicit PlaybackManager(QObject *parent = nullptr);
Q_PROPERTY(ApiClient *apiClient MEMBER m_apiClient WRITE setApiClient)
Q_PROPERTY(QString streamUrl READ streamUrl NOTIFY streamUrlChanged)
Q_PROPERTY(bool autoOpen MEMBER m_autoOpen NOTIFY autoOpenChanged)
Q_PROPERTY(int audioIndex MEMBER m_audioIndex NOTIFY audioIndexChanged)
Q_PROPERTY(int subtitleIndex MEMBER m_subtitleIndex NOTIFY subtitleIndexChanged)
Q_PROPERTY(bool resumePlayback MEMBER m_resumePlayback NOTIFY resumePlaybackChanged)
Q_PROPERTY(PlayMethod playMethod READ playMethod NOTIFY playMethodChanged)
// Current Item and queue informatoion
Q_PROPERTY(Model::Item *item READ item NOTIFY itemChanged)
Q_PROPERTY(QAbstractItemModel *queue READ queue NOTIFY queueChanged)
Q_PROPERTY(int queueIndex READ queueIndex NOTIFY queueIndexChanged)
// Current media player related property getters
Q_PROPERTY(qint64 duration READ duration NOTIFY durationChanged)
Q_PROPERTY(QMediaPlayer::Error error READ error NOTIFY errorChanged)
Q_PROPERTY(QString errorString READ errorString NOTIFY errorStringChanged)
Q_PROPERTY(bool hasVideo READ hasVideo NOTIFY hasVideoChanged)
Q_PROPERTY(QObject* mediaObject READ mediaObject NOTIFY mediaObjectChanged)
Q_PROPERTY(QMediaPlayer::MediaStatus mediaStatus READ mediaStatus NOTIFY mediaStatusChanged)
Q_PROPERTY(QMediaPlayer::State playbackState READ playbackState NOTIFY playbackStateChanged)
Q_PROPERTY(qint64 position READ position NOTIFY positionChanged)
Model::Item *item() const { return m_item.data(); }
void setApiClient(ApiClient *apiClient);
QString streamUrl() const { return m_streamUrl; }
PlayMethod playMethod() const { return m_playMethod; }
QObject *mediaObject() const { return m_mediaPlayer; }
qint64 position() const { return m_mediaPlayer->position(); }
qint64 duration() const { return m_mediaPlayer->duration(); }
ItemModel *queue() const { return m_queue; }
int queueIndex() const { return m_queueIndex; }
// Current media player related property getters
QMediaPlayer::State playbackState() const { return m_playbackState; }
QMediaPlayer::MediaStatus mediaStatus() const { return m_mediaPlayer->mediaStatus(); }
bool hasVideo() const { return m_mediaPlayer->isVideoAvailable(); }
QMediaPlayer::Error error () const { return m_mediaPlayer->error(); }
QString errorString() const { return m_mediaPlayer->errorString(); }
signals:
void itemChanged(BaseItemDto *newItemId);
void streamUrlChanged(const QString &newStreamUrl);
void autoOpenChanged(bool autoOpen);
void audioIndexChanged(int audioIndex);
void subtitleIndexChanged(int subtitleIndex);
void mediaPlayerChanged(QObject *newMediaPlayer);
void resumePlaybackChanged(bool newResumePlayback);
void playMethodChanged(PlayMethod newPlayMethod);
// Current media player related property signals
void mediaObjectChanged(QObject *newMediaObject);
void positionChanged(qint64 newPosition);
void durationChanged(qint64 newDuration);
void queueChanged(ItemModel *newQue);
void queueIndexChanged(int newIndex);
void playbackStateChanged(QMediaPlayer::State newState);
void mediaStatusChanged(QMediaPlayer::MediaStatus newMediaStatus);
void hasVideoChanged(bool newHasVideo);
void errorChanged(QMediaPlayer::Error newError);
void errorStringChanged(const QString &newErrorString);
public slots:
/**
* @brief playItem Plays the item with the given id. This will construct the Jellyfin::Item internally
* and delete it later.
* @param itemId The id of the item to play.
*/
void playItem(const QString &itemId);
void playItemInList(ItemModel *itemList, int index);
void play() { m_mediaPlayer->play(); }
void pause() { m_mediaPlayer->pause(); }
void seek(qint64 pos) { m_mediaPlayer->setPosition(pos); }
void stop() { m_mediaPlayer->stop(); }
/**
* @brief previous Play the previous track in the current playlist.
*/
void previous();
/**
* @brief next Play the next track in the current playlist.
*/
void next();
private slots:
void mediaPlayerStateChanged(QMediaPlayer::State newState);
void mediaPlayerPositionChanged(qint64 position);
void mediaPlayerMediaStatusChanged(QMediaPlayer::MediaStatus newStatus);
void mediaPlayerError(QMediaPlayer::Error error);
/**
* @brief updatePlaybackInfo Updates the Jellyfin server with the current playback progress etc.
*/
void updatePlaybackInfo();
private:
QTimer m_updateTimer;
ApiClient *m_apiClient = nullptr;
QSharedPointer<Model::Item> m_item;
QString m_streamUrl;
QString m_playSessionId;
int m_audioIndex = 0;
int m_subtitleIndex = -1;
qint64 m_resumePosition = 0;
qint64 m_oldPosition = 0;
qint64 m_stopPosition = 0;
QMediaPlayer::State m_oldState = QMediaPlayer::StoppedState;
PlayMethod m_playMethod = Transcode;
QMediaPlayer::State m_playbackState = QMediaPlayer::StoppedState;
// Pointer to the current media player.
QMediaPlayer *m_mediaPlayer = nullptr;
QMediaPlayer *m_mediaPlayer1;
QMediaPlayer *m_mediaPlayer2;
ItemModel *m_queue = nullptr;
int m_queueIndex = 0;
bool m_resumePlayback = true;
void setItem(ViewModel::Item *newItem);
void swapMediaPlayer();
bool m_qmlIsParsingComponent = false;
/**
* @brief Whether to automatically open the livestream of the item;
*/
bool m_autoOpen = false;
/**
* @brief Retrieves the URL of the stream to open.
*/
void fetchStreamUrl(const Model::Item *item, bool autoOpen, const FetchCallback &callback);
void fetchAndSetStreamUrl(const Model::Item *item);
void setStreamUrl(const QString &streamUrl);
void setPlaybackState(QMediaPlayer::State newState);
Model::Item *nextItem();
void setQueue(ItemModel *itemModel);
// Factor to multiply with when converting from milliseconds to ticks.
const static int MS_TICK_FACTOR = 10000;
enum PlaybackInfoType { Started, Stopped, Progress };
/**
* @brief Posts the playback information
*/
void postPlaybackInfo(PlaybackInfoType type);
void classBegin() override {
m_qmlIsParsingComponent = true;
}
void componentComplete() override;
};
} // NS ViewModel
} // NS Jellyfin
#endif // JELLYFIN_VIEWMODEL_PLAYBACKMANAGER_H