Add progressive video download option

Buffer download whole network video during playback to allow fast seeking for online media. Can be disabled in prefs (enabled by default).

clapper_src/dialogs.js

@@ -196,6 +196,10 @@ class ClapperPrefsDialog extends Gtk.Dialog
                     {
                         title: 'Subtitles',
                         widget: Prefs.SubtitlesPage,
+                    },
+                    {
+                        title: 'Network',
+                        widget: Prefs.NetworkPage,
                     }
                 ]
             },

clapper_src/playerBase.js

@@ -88,6 +88,7 @@ class ClapperPlayerBase extends GstPlayer.Player
             'seeking-mode',
             'audio-offset',
             'subtitle-offset',
+            'play-flags',
         ];
 
         for(let key of settingsToSet)
@@ -256,6 +257,16 @@ class ClapperPlayerBase extends GstPlayer.Player
                 root[action + '_css_class'](brightClass);
                 debug(`${action} brighter sliders`);
                 break;
+            case 'play-flags':
+                const initialFlags = this.pipeline.flags;
+                const settingsFlags = settings.get_int(key);
+
+                if(initialFlags === settingsFlags)
+                    break;
+
+                this.pipeline.flags = settingsFlags;
+                debug(`changed play flags: ${initialFlags} -> ${settingsFlags}`);
+                break;
             default:
                 break;
         }

clapper_src/prefs.js

@@ -1,4 +1,4 @@
-const { GObject, Gtk, Pango } = imports.gi;
+const { GObject, Gst, Gtk, Pango } = imports.gi;
 const Misc = imports.clapper_src.misc;
 const PrefsBase = imports.clapper_src.prefsBase;
 
@@ -85,6 +85,18 @@ class ClapperSubtitlesPage extends PrefsBase.Grid
     }
 });
 
+var NetworkPage = GObject.registerClass(
+class ClapperNetworkPage extends PrefsBase.Grid
+{
+    _init()
+    {
+        super._init();
+
+        this.addTitle('Client');
+        this.addPlayFlagCheckButton('Progressive download buffering', Gst.PlayFlags.DOWNLOAD);
+    }
+});
+
 var GStreamerPage = GObject.registerClass(
 class ClapperGStreamerPage extends PrefsBase.Grid
 {

clapper_src/prefsBase.js

@@ -127,6 +127,17 @@ class ClapperPrefsGrid extends Gtk.Grid
         return this.addToGrid(widget);
     }
 
+    addPlayFlagCheckButton(text, flag)
+    {
+        let checkButton = this.addCheckButton(text);
+        let playFlags = settings.get_int('play-flags');
+
+        checkButton.active = ((playFlags & flag) === flag);
+        checkButton.connect('toggled', this._onPlayFlagToggled.bind(this, flag));
+
+        return checkButton;
+    }
+
     addFontButton(text, setting)
     {
         let label = this.getLabel(text + ':');
@@ -188,7 +199,9 @@ class ClapperPrefsGrid extends Gtk.Grid
         let checkButton = new Gtk.CheckButton({
             label: text || null,
         });
-        settings.bind(setting, checkButton, 'active', this.flag);
+
+        if(setting)
+            settings.bind(setting, checkButton, 'active', this.flag);
 
         return checkButton;
     }
@@ -204,6 +217,18 @@ class ClapperPrefsGrid extends Gtk.Grid
         return fontButton;
     }
 
+    _onPlayFlagToggled(flag, button)
+    {
+        let playFlags = settings.get_int('play-flags');
+
+        if(button.active)
+            playFlags |= flag;
+        else
+            playFlags &= ~flag;
+
+        settings.set_int('play-flags', playFlags);
+    }
+
     _onClose(name)
     {
         if(name)