mostly full mpris support, again

src/mpris.vala

@@ -1,3 +1,4 @@
+/*
 [DBus (name = "org.mpris.MediaPlayer2.Player")]
 class Audrey.MprisPlayer : Object {
     internal signal void on_next ();
@@ -22,9 +23,9 @@ class Audrey.MprisPlayer : Object {
     public signal void seeked (int64 position);
 
     public string playback_status { owned get; internal set; default = "Stopped"; }
-    public string loop_status { owned get; /*set;*/ default = "None"; }
-    public double rate { get; /*set*/ default = 1.0; }
-    public bool shuffle { get; /*set*/ default = false; }
+    public string loop_status { owned get; set; default = "None"; }
+    public double rate { get; set default = 1.0; }
+    public bool shuffle { get; set default = false; }
     public HashTable<string, Variant> metadata { owned get; private set; default = new HashTable<string, Variant> (null, null); }
     public double volume { get; set; default = 1.0; }
     [CCode (notify = false)]
@@ -219,3 +220,4 @@ class Audrey.MprisPlayer : Object {
         debug ("destroying mpris player");
     }
 }
+*/

src/mpris/player.rs

@@ -2,27 +2,37 @@ use glib::SendWeakRef;
 use gtk::glib;
 use std::collections::HashMap;
 use zbus::object_server::SignalEmitter;
-use zbus::zvariant::{ObjectPath, OwnedObjectPath, Type, Value};
+use zbus::zvariant::{ObjectPath, OwnedObjectPath, Value};
 
-#[derive(Clone, Value, Type)]
-#[zvariant(signature = "a{sv}")]
+const MICROSECONDS: f64 = 1e6; // in a second
+
+#[derive(Default)]
 struct MetadataMap {
-    pub trackid: OwnedObjectPath,
+    pub track_id: Option<OwnedObjectPath>,
     // rest: TODO
 }
 
 impl MetadataMap {
-    fn from_playbin(_playbin: &crate::Playbin) -> Self {
-        // TODO
-        Self {
-            trackid: "/org/mpris/MediaPlayer2/TrackList/NoTrack"
+    fn from_playbin_song(song: Option<&crate::playbin::Song>) -> Self {
+        song.map(|song| MetadataMap {
+            // FIXME: see if there's a better way to do this lol
+            track_id: Some({
+                let song_object_intptr =
+                    glib::translate::ToGlibPtr::<*const _>::to_glib_none(song).0 as usize;
+                format!("/eu/callcc/audrey/TrackId/{song_object_intptr:x}")
                     .try_into()
-                .unwrap(),
-        }
+                    .unwrap()
+            }),
+        })
+        .unwrap_or_else(Default::default)
     }
 
     fn as_hash_map(&self) -> HashMap<&'static str, Value> {
-        HashMap::from([("mpris:trackid", Value::new(self.trackid.as_ref()))])
+        let mut map = HashMap::new();
+        if let Some(track_id) = &self.track_id {
+            map.insert("mpris:trackid", Value::new(track_id.as_ref()));
+        }
+        map
     }
 }
 
@@ -41,7 +51,7 @@ impl Player {
 
         let player = Self {
             playbin: playbin.downgrade().into(),
-            metadata: MetadataMap::from_playbin(playbin),
+            metadata: MetadataMap::from_playbin_song(None),
             volume: (playbin.volume() as f64) / 100.0,
         };
 
@@ -55,10 +65,20 @@ impl Player {
             "new-track",
             false,
             glib::closure_local!(
-                //#[strong]
-                //player,
-                move |_playbin: &crate::Playbin| {
-                    // TODO
+                #[strong]
+                player_ref,
+                move |_playbin: &crate::Playbin, song: &crate::playbin::Song| {
+                    let metadata = MetadataMap::from_playbin_song(Some(song));
+
+                    let player_ref = player_ref.clone();
+                    glib::spawn_future_local(async move {
+                        let mut player = player_ref.get_mut().await;
+                        player.metadata = metadata;
+                        player
+                            .metadata_changed(player_ref.signal_emitter())
+                            .await
+                            .unwrap();
+                    });
                 }
             ),
         );
@@ -91,39 +111,122 @@ impl Player {
 #[zbus::interface(name = "org.mpris.MediaPlayer2.Player")]
 impl Player {
     fn next(&self) {
-        todo!()
+        // If CanGoNext is false, attempting to call this method should have no effect.
+        if !self.can_go_next() {
+            return;
+        }
+
+        let playbin = self.playbin.upgrade().unwrap();
+        if playbin.play_queue_position() + 1 > playbin.play_queue_length() {
+            // If there is no next track (and endless playback and track repeat are both off), stop playback.
+            self.stop();
+        } else {
+            playbin.go_to_next_track();
+        }
     }
 
     fn previous(&self) {
-        todo!()
+        // If CanGoPrevious is false, attempting to call this method should have no effect.
+        if !self.can_go_previous() {
+            return;
+        }
+
+        let playbin = self.playbin.upgrade().unwrap();
+        if playbin.play_queue_position() == 0 {
+            // If there is no previous track (and endless playback and track repeat are both off), stop playback.
+            self.stop();
+        } else {
+            playbin.go_to_prev_track();
+        }
     }
 
     fn pause(&self) {
-        todo!()
+        // If CanPause is false, attempting to call this method should have no effect.
+        if !self.can_pause() {
+            return;
+        }
+        self.playbin.upgrade().unwrap().pause();
     }
 
     fn play_pause(&self) {
-        todo!()
+        // don't think this is exactly according to spec but it looks more reasonable to me
+        if self.playbin.upgrade().unwrap().state() == crate::playbin::State::Paused {
+            self.play();
+        } else {
+            self.pause();
+        }
     }
 
     fn stop(&self) {
-        todo!()
+        // TODO: Calling Play after this should cause playback to start again from the beginning of the track.
+        // (not the play queue!!)
+        self.playbin.upgrade().unwrap().stop();
     }
 
     fn play(&self) {
-        todo!()
+        // If CanPlay is false, attempting to call this method should have no effect.
+        if !self.can_play() {
+            return;
         }
 
-    fn seek(&self, _offset: i64) {
-        todo!()
+        let playbin = self.playbin.upgrade().unwrap();
+        // If there is no track to play, this has no effect.
+        if playbin.play_queue_length() == 0 {
+            return;
         }
 
-    fn set_position(&self, _track_id: ObjectPath<'_>, _position: i64) {
-        todo!()
+        playbin.play();
     }
 
-    fn open_uri(&self, _s: &str) {
-        todo!()
+    fn seek(&self, offset: i64) {
+        // If the CanSeek property is false, this has no effect.
+        if !self.can_seek() {
+            return;
+        }
+
+        let playbin = self.playbin.upgrade().unwrap();
+        // Seeks forward in the current track by the specified number of microseconds.
+        let mut new_position = (playbin.position() * MICROSECONDS) as i64 + offset;
+
+        // A negative value seeks back. If this would mean seeking back further than the start of the track, the position is set to 0.
+        if new_position < 0 {
+            new_position = 0;
+        }
+
+        // If the value passed in would mean seeking beyond the end of the track, acts like a call to Next.
+        if new_position >= (playbin.duration() * MICROSECONDS) as i64 {
+            return self.next();
+        }
+
+        playbin.seek(new_position as f64 / MICROSECONDS);
+    }
+
+    fn set_position(&self, track_id: ObjectPath<'_>, position: i64) {
+        let playbin = self.playbin.upgrade().unwrap();
+
+        // If the Position argument is less than 0, do nothing.
+        if position < 0 {
+            return;
+        }
+        // If the Position argument is greater than the track length, do nothing.
+        if position > (playbin.duration() * MICROSECONDS) as i64 {
+            return;
+        }
+        // If the CanSeek property is false, this has no effect.
+        if !self.can_seek() {
+            return;
+        }
+        // check if it's stale
+        if self.metadata.track_id.as_deref() != Some(&track_id) {
+            // TODO: warn of stale seek
+            return;
+        }
+
+        playbin.seek(position as f64 / MICROSECONDS);
+    }
+
+    fn open_uri(&self, _s: &str) -> zbus::fdo::Result<()> {
+        Err(zbus::fdo::Error::NotSupported("OpenUri".into()))
     }
 
     #[zbus(signal)]
@@ -154,8 +257,8 @@ impl Player {
     }
 
     #[zbus(property)]
-    fn set_playback_rate(&self, _playback_rate: f64) {
-        todo!()
+    fn set_playback_rate(&self, _playback_rate: f64) -> zbus::Result<()> {
+        Err(zbus::Error::Unsupported)
     }
 
     #[zbus(property)]
@@ -187,7 +290,7 @@ impl Player {
 
     #[zbus(property(emits_changed_signal = "false"))]
     fn position(&self) -> i64 {
-        (self.playbin.upgrade().unwrap().position() * 1e9) as i64
+        (self.playbin.upgrade().unwrap().position() * MICROSECONDS) as i64
     }
 
     #[zbus(property)]
@@ -202,27 +305,27 @@ impl Player {
 
     #[zbus(property)]
     fn can_go_next(&self) -> bool {
-        false // TODO
+        self.playbin.upgrade().unwrap().state() != crate::playbin::State::Stopped
     }
 
     #[zbus(property)]
     fn can_go_previous(&self) -> bool {
-        false // TODO
+        self.playbin.upgrade().unwrap().state() != crate::playbin::State::Stopped
     }
 
     #[zbus(property)]
     fn can_play(&self) -> bool {
-        false // TODO
+        self.playbin.upgrade().unwrap().state() != crate::playbin::State::Stopped
     }
 
     #[zbus(property)]
     fn can_pause(&self) -> bool {
-        false // TODO
+        self.playbin.upgrade().unwrap().state() != crate::playbin::State::Stopped
     }
 
     #[zbus(property)]
     fn can_seek(&self) -> bool {
-        false // TODO
+        self.playbin.upgrade().unwrap().state() != crate::playbin::State::Stopped
     }
 
     #[zbus(property(emits_changed_signal = "const"))]

src/playbin.rs

@@ -35,6 +35,7 @@ pub mod ffi {
         pub fn audrey_playbin_get_play_queue_position(
             self_: *mut AudreyPlaybin,
         ) -> std::ffi::c_uint;
+        pub fn audrey_playbin_get_play_queue_length(self_: *mut AudreyPlaybin) -> std::ffi::c_uint;
         pub fn audrey_playbin_move_track(
             self_: *mut AudreyPlaybin,
             from: std::ffi::c_uint,
@@ -111,6 +112,10 @@ impl Playbin {
         unsafe { ffi::audrey_playbin_get_play_queue_position(self.to_glib_none().0) }
     }
 
+    pub fn play_queue_length(&self) -> u32 {
+        unsafe { ffi::audrey_playbin_get_play_queue_length(self.to_glib_none().0) }
+    }
+
     pub fn move_track(&self, from: u32, to: u32) {
         unsafe { ffi::audrey_playbin_move_track(self.to_glib_none().0, from, to) }
     }

src/playbin.vala

@@ -98,9 +98,11 @@ public class Audrey.Playbin : GLib.Object {
     public int play_queue_position { get; private set; default = -1; }
 
     // signalled when a new track is current
-    public signal void new_track ();
+    public signal void new_track (PlaybinSong song);
     // signalled when the last track is over
     public signal void stopped ();
+    // signalled when the position changes discontinuously
+    public signal void seeked (double position);
 
     // these are mostly synced with mpv
     public double position { get; private set; default = 0.0; }
@@ -211,9 +213,10 @@ public class Audrey.Playbin : GLib.Object {
 
                         // estimate duration from api data
                         // while mpv doesn't know it
-                        this.duration = ((PlaybinSong) this._play_queue.get_item (this.play_queue_position)).duration;
+                        var song = (PlaybinSong) this._play_queue.get_item (this.play_queue_position);
+                        this.duration = song.duration;
 
-                        this.new_track ();
+                        this.new_track (song);
                         break;
 
                     case Mpv.EventId.END_FILE:
@@ -262,6 +265,7 @@ public class Audrey.Playbin : GLib.Object {
             warning (@"could not seek to $position: $rc");
         } else {
             this.position = position;
+            this.seeked (position);
         }
     }
 

src/ui/window.vala

@@ -29,8 +29,6 @@ public class Audrey.Ui.Window : Adw.ApplicationWindow {
         Object (application: app);
     }
 
-    private MprisPlayer mpris_player;
-
     private void now_playing (PlaybinSong song) {
         this.song = song;
         // api.scrobble.begin (this.song.id); TODO