just use the sync mpv api for everything

seems to be fast enough

src/playbin.vala

@@ -4,16 +4,6 @@ enum PlaybinState {
     PLAYING,
 }
 
-errordomain PlaybinError {
-    MPV,
-}
-
-private void check_mpv_error (int ec) throws PlaybinError {
-    if (ec < 0) {
-        throw new PlaybinError.MPV ("%s", Mpv.error_string (ec));
-    }
-}
-
 private class SourceFuncWrapper {
     public SourceFunc inner;
 
@@ -32,7 +22,7 @@ class Playbin : GLib.Object {
         get { return _volume; }
         set {
             _volume = value;
-            mpv_set_property_int64.begin ("volume", value);
+            assert (mpv.set_property_int64 ("volume", value) >= 0);
         }
     }
 
@@ -41,7 +31,7 @@ class Playbin : GLib.Object {
         get { return _mute; }
         set {
             _mute = value;
-            mpv_set_property_flag.begin ("mute", value);
+            assert (mpv.set_property_flag ("mute", value) >= 0);
         }
     }
 
@@ -65,87 +55,29 @@ class Playbin : GLib.Object {
     }
 
     private void on_play_queue_items_changed (ListModel play_queue, uint position, uint removed, uint added) {
-        // FIXME: these should prolly be chained
+        try {
-
             for (uint i = 0; i < removed; i += 1) {
-            this.mpv_command.begin ({"playlist-remove", position.to_string ()});
+                assert (this.mpv.command ({"playlist-remove", position.to_string ()}) >= 0);
             }
 
             for (uint i = 0; i < added; i += 1) {
-            this.mpv_command.begin ({"loadfile", this.api.stream_uri (((Subsonic.Song) play_queue.get_item (position+i)).id), "insert-at-play", (position+i).to_string ()});
+                assert (this.mpv.command ({"loadfile", this.api.stream_uri (((Subsonic.Song) play_queue.get_item (position+i)).id), "insert-at-play", (position+i).to_string ()}) >= 0);
             }
+        } catch (Error e) {
+            error ("could not update mpv playlist: %s\n", e.message);
         }
-
-    private SourceFuncWrapper[] mpv_command_callbacks = {};
-    private int[] mpv_command_error = {};
-
-    private async void mpv_command (string[] args) throws Error {
-        int userdata = -1;
-        for (int i = 0; i < this.mpv_command_callbacks.length; i += 1) {
-            if (this.mpv_command_callbacks[i].inner == null) {
-                userdata = i;
-                break;
-            }
-        }
-        if (userdata == -1) {
-            userdata = this.mpv_command_callbacks.length;
-            this.mpv_command_callbacks += new SourceFuncWrapper ();
-            this.mpv_command_error += 0;
-        }
-
-        check_mpv_error (this.mpv.command_async ((uint64) userdata, args));
-        this.mpv_command_callbacks[userdata].inner = this.mpv_command.callback;
-        yield;
-
-        check_mpv_error (this.mpv_command_error[userdata]);
-    }
-
-    private SourceFuncWrapper[] mpv_set_property_callbacks = {};
-    private int[] mpv_set_property_error = {};
-
-    private async void mpv_set_property (string name, Mpv.Format format, void *data) throws Error {
-        int userdata = -1;
-        for (int i = 0; i < this.mpv_set_property_callbacks.length; i += 1) {
-            if (this.mpv_set_property_callbacks[i].inner == null) {
-                userdata = i;
-                break;
-            }
-        }
-        if (userdata == -1) {
-            userdata = this.mpv_set_property_callbacks.length;
-            this.mpv_set_property_callbacks += new SourceFuncWrapper ();
-            this.mpv_set_property_error += 0;
-        }
-
-        check_mpv_error (this.mpv.set_property_async ((uint64) userdata, name, format, data));
-        this.mpv_set_property_callbacks[userdata].inner = this.mpv_set_property.callback;
-        yield;
-
-        check_mpv_error (this.mpv_set_property_error[userdata]);
-    }
-
-    private async void mpv_set_property_int64 (string name, int64 value) throws Error {
-        yield this.mpv_set_property (name, Mpv.Format.INT64, &value);
-    }
-
-    private async void mpv_set_property_flag (string name, bool value) throws Error {
-        int flag = value ? 1 : 0;
-        yield this.mpv_set_property (name, Mpv.Format.FLAG, &flag);
     }
 
     public Playbin () {
-        try {
+        assert (this.mpv.initialize () >= 0);
-            check_mpv_error (this.mpv.initialize ());
+        assert (this.mpv.set_property_string ("user-agent", Audrey.Const.user_agent) >= 0);
-            check_mpv_error (this.mpv.set_property_string ("user-agent", Audrey.Const.user_agent));
+        assert (this.mpv.set_property_string ("video", "no") >= 0);
-            check_mpv_error (this.mpv.set_property_string ("video", "no"));
+        assert (this.mpv.set_property_string ("prefetch-playlist", "yes") >= 0);
-            check_mpv_error (this.mpv.set_property_string ("prefetch-playlist", "yes"));
+        assert (this.mpv.set_property_string ("gapless-audio", "yes") >= 0);
-            check_mpv_error (this.mpv.set_property_string ("gapless-audio", "yes"));
+        assert (this.mpv.observe_property (0, "time-pos", Mpv.Format.DOUBLE) >= 0);
-            check_mpv_error (this.mpv.observe_property (0, "time-pos", Mpv.Format.DOUBLE));
+        assert (this.mpv.observe_property (1, "duration", Mpv.Format.DOUBLE) >= 0);
-            check_mpv_error (this.mpv.observe_property (1, "duration", Mpv.Format.DOUBLE));
+        assert (this.mpv.observe_property (2, "playlist-pos", Mpv.Format.INT64) >= 0);
-            check_mpv_error (this.mpv.observe_property (2, "playlist-pos", Mpv.Format.INT64));
+        
-        } catch (Error e) {
-            error ("could not initialize mpv: %s", e.message);
-        }
 
         this.mpv.wakeup_callback = () => {
             Idle.add (() => {
@@ -154,18 +86,6 @@ class Playbin : GLib.Object {
                     if (event.event_id == Mpv.EventId.NONE) break;
 
                     switch (event.event_id) {
-                    case Mpv.EventId.COMMAND_REPLY:
-                        this.mpv_command_error[event.reply_userdata] = event.error;
-                        var cb = (owned) this.mpv_command_callbacks[event.reply_userdata].inner;
-                        cb ();
-                        break;
-
-                    case Mpv.EventId.SET_PROPERTY_REPLY:
-                        this.mpv_set_property_error[event.reply_userdata] = event.error;
-                        var cb = (owned) this.mpv_set_property_callbacks[event.reply_userdata].inner;
-                        cb ();
-                        break;
-
                     case Mpv.EventId.PROPERTY_CHANGE:
                         switch (event.reply_userdata) {
                         case 0:
@@ -248,38 +168,38 @@ class Playbin : GLib.Object {
 
     public void seek (double position) {
         this.position = position;
-        this.mpv_command.begin ({"seek", position.to_string (), "absolute"});
+        assert (this.mpv.command ({"seek", position.to_string (), "absolute"}) >= 0);
     }
 
     // manually changes which track in the play queue to play
     public void select_track (uint position)
             requires (position < this.play_queue.get_n_items ())
     {
-        this.mpv_command.begin ({"playlist-play-index", position.to_string ()});
+        assert (this.mpv.command ({"playlist-play-index", position.to_string ()}) >= 0);
         this.state = PlaybinState.PLAYING;
     }
 
     public void pause () {
         assert (this.state != PlaybinState.STOPPED);
         this.state = PlaybinState.PAUSED;
-        this.mpv_command.begin ({"pause"});
+        assert (this.mpv.command ({"pause"}) >= 0);
     }
 
     public void play () {
         assert (this.state != PlaybinState.STOPPED);
         this.state = PlaybinState.PLAYING;
-        this.mpv_command.begin ({"play"});
+        assert (this.mpv.command ({"play"}) >= 0);
     }
 
     public void next_track () {
         assert (this.state != PlaybinState.STOPPED);
         this.state = PlaybinState.PLAYING;
-        this.mpv_command.begin ({"playlist-next-playlist"});
+        assert (this.mpv.command ({"playlist-next-playlist"}) >= 0);
     }
 
     public void prev_track () {
         assert (this.state != PlaybinState.STOPPED);
         this.state = PlaybinState.PLAYING;
-        this.mpv_command.begin ({"playlist-prev-playlist"});
+        assert (this.mpv.command ({"playlist-prev-playlist"}) >= 0);
     }
 }

src/vapi/mpv.vapi

@@ -1,8 +1,33 @@
 [CCode (cheader_filename = "mpv/client.h")]
 namespace Mpv {
 
+    [CCode (cname = "mpv_error", cprefix = "MPV_ERROR_", has_type_id = false)]
+    public enum Error {
+        SUCCESS,
+        EVENT_QUEUE_FULL,
+        NOMEM,
+        UNINITIALIZED,
+        INVALID_PARAMETER,
+        OPTION_NOT_FOUND,
+        OPTION_FORMAT,
+        OPTION_ERROR,
+        PROPERTY_NOT_FOUND,
+        PROPERTY_FORMAT,
+        PROPERTY_UNAVAILABLE,
+        PROPERTY_ERROR,
+        COMMAND,
+        LOADING_FAILED,
+        AO_INIT_FAILED,
+        VO_INIT_FAILED,
+        NOTHING_TO_PLAY,
+        UNKNOWN_FORMAT,
+        UNSUPPORTED,
+        NOT_IMPLEMENTED,
+        GENERIC;
+
         [CCode (cname = "mpv_error_string")]
-    public unowned string error_string (int error);
+        public unowned string to_string ();
+    }
 
     public delegate void WakeupCallback ();
 
@@ -13,7 +38,7 @@ namespace Mpv {
         public Handle ();
 
         [CCode (cname = "mpv_initialize")]
-        public int initialize ();
+        public Error initialize ();
 
         [CCode (cname = "mpv_wait_event")]
         public unowned Event *wait_event (double timeout);
@@ -22,20 +47,28 @@ namespace Mpv {
             [CCode (cname = "mpv_set_wakeup_callback")] set;
         }
 
+        [CCode (cname = "mpv_set_property")]
+        public Error set_property (string name, Format format, void *data);
+
         [CCode (cname = "mpv_set_property_string")]
-        public int set_property_string (string name, string data);
+        public Error set_property_string (string name, string value);
 
-        [CCode (cname = "mpv_set_property_async")]
+        public Error set_property_int64 (string name, int64 value) {
-        public int set_property_async (uint64 reply_userdata, string name, Format format, void *data);
+            return this.set_property (name, Format.INT64, &value);
+        }
 
-        [CCode (cname = "mpv_command_async")]
+        public Error set_property_flag (string name, bool value) {
-        public int command_async (
+            int flag = value ? 1 : 0;
-            uint64 reply_userdata,
+            return this.set_property (name, Format.INT64, &flag);
+        }
+
+        [CCode (cname = "mpv_command")]
+        public Error command (
             [CCode (array_length = false)]
             string[] args);
 
         [CCode (cname = "mpv_observe_property")]
-        public int observe_property (uint64 reply_userdata, string name, Format format);
+        public Error observe_property (uint64 reply_userdata, string name, Format format);
     }
 
     [CCode (cname = "mpv_format", cprefix = "MPV_FORMAT_", has_type_id = false)]
@@ -80,7 +113,7 @@ namespace Mpv {
     [CCode (cname = "mpv_event")]
     public struct Event {
         EventId event_id;
-        int error;
+        Error error;
         uint64 reply_userdata;
         void *data;
     }
@@ -98,4 +131,3 @@ namespace Mpv {
     }
 
 }
-