feat: add playlist, recent files and MPRIS backends

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/mpv/mpvitem.h

@@ -29,6 +29,19 @@ class MpvItem : public MpvAbstractItem
     // In seconds; applied to both subtitles so a translation stays in sync with its source.
     Q_PROPERTY(double subtitleDelay READ subtitleDelay WRITE setSubtitleDelay NOTIFY subtitleDelayChanged)
 
+    // Audio tracks of the current file, each a map with id, title, lang and codec.
+    Q_PROPERTY(QVariantList audioTracks READ audioTracks NOTIFY audioTracksChanged)
+    Q_PROPERTY(int audioId READ audioId WRITE setAudioId NOTIFY audioTracksChanged)
+    // 0 to volumeMax (mpv's "volume-max", 130 unless mpv.conf changes it).
+    Q_PROPERTY(int volume READ volume WRITE setVolume NOTIFY volumeChanged)
+    Q_PROPERTY(int volumeMax READ volumeMax NOTIFY volumeMaxChanged)
+    Q_PROPERTY(bool mute READ mute WRITE setMute NOTIFY muteChanged)
+    Q_PROPERTY(double speed READ speed WRITE setSpeed NOTIFY speedChanged)
+    // Chapters of the current file, each a map with title and time (in seconds).
+    Q_PROPERTY(QVariantList chapters READ chapters NOTIFY chaptersChanged)
+    // Index into chapters, -1 before the first chapter or without chapters.
+    Q_PROPERTY(int chapter READ chapter WRITE setChapter NOTIFY chapterChanged)
+
     // Load the user's mpv.conf when mpv starts. Must be set before the item is shown.
     Q_PROPERTY(bool loadUserConfig READ loadUserConfig WRITE setLoadUserConfig NOTIFY loadUserConfigChanged)
     Q_PROPERTY(QString userConfigDir READ userConfigDir CONSTANT)
@@ -55,6 +68,19 @@ public:
     void setSecondarySubtitleId(int id);
     double subtitleDelay() const;
     void setSubtitleDelay(double seconds);
+    QVariantList audioTracks() const;
+    int audioId() const;
+    void setAudioId(int id);
+    int volume() const;
+    void setVolume(int volume);
+    int volumeMax() const;
+    bool mute() const;
+    void setMute(bool mute);
+    double speed() const;
+    void setSpeed(double speed);
+    QVariantList chapters() const;
+    int chapter() const;
+    void setChapter(int chapter);
     bool loadUserConfig() const;
     void setLoadUserConfig(bool load);
     QString userConfigDir() const;
@@ -62,8 +88,15 @@ public:
     QStringList skippedUserOptions() const;
 
     Q_INVOKABLE void loadFile(const QUrl &url);
+    // Unloads the current file.
+    Q_INVOKABLE void stop();
     Q_INVOKABLE void togglePause();
     Q_INVOKABLE void seek(double seconds);
+    // Seeks \a seconds forward, or backward when negative.
+    Q_INVOKABLE void seekBy(double seconds);
+    Q_INVOKABLE void frameStep(bool forward);
+    // Saves a screenshot the way mpv does (screenshot-directory, screenshot-format).
+    Q_INVOKABLE void screenshot();
     // Adds an external subtitle file and makes it the primary subtitle.
     Q_INVOKABLE void addSubtitleFile(const QUrl &url);
     // Makes \a url the only subtitle shown, adding it first (named \a title) unless it is
@@ -81,6 +114,15 @@ Q_SIGNALS:
     void fileLoadedChanged();
     void subtitleTracksChanged();
     void subtitleDelayChanged();
+    void audioTracksChanged();
+    void volumeChanged();
+    void volumeMaxChanged();
+    void muteChanged();
+    void speedChanged();
+    void chaptersChanged();
+    void chapterChanged();
+    // Playback reached the end of the file. The last frame stays on screen.
+    void endOfFile();
     void loadUserConfigChanged();
     // mpv.conf was queued for loading; options set after this take precedence over it.
     void userConfigApplied();
@@ -104,6 +146,14 @@ private:
     int m_subtitleId = 0;
     int m_secondarySubtitleId = 0;
     double m_subtitleDelay = 0.0;
+    QVariantList m_audioTracks;
+    int m_audioId = 0;
+    int m_volume = 100;
+    int m_volumeMax = 130;
+    bool m_mute = false;
+    double m_speed = 1.0;
+    QVariantList m_chapters;
+    int m_chapter = -1;
     // File added by showTranslatedSubtitleFile() that should be shown once mpv lists it.
     QString m_pendingTranslatedPath;
     bool m_loadUserConfig = false;