API: operate on cubic volume scale

Instead converting volume inside GJS, simplify things by making API operate on cubic volume scale.

lib/gst/clapper/gstclapper.c

@@ -36,6 +36,7 @@
 #include <gst/gst.h>
 #include <gst/video/video.h>
 #include <gst/video/colorbalance.h>
+#include <gst/audio/streamvolume.h>
 #include <gst/tag/tag.h>
 #include <gst/pbutils/descriptions.h>
 
@@ -331,7 +332,7 @@ gst_clapper_class_init (GstClapperClass * klass)
 
   param_specs[PROP_VOLUME] =
       g_param_spec_double ("volume", "Volume", "Volume",
-      0, 3.375, DEFAULT_VOLUME, G_PARAM_READWRITE |
+      0, 1.5, DEFAULT_VOLUME, G_PARAM_READWRITE |
       G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
 
   param_specs[PROP_MUTE] =
@@ -656,10 +657,22 @@ gst_clapper_set_property (GObject * object, guint prop_id,
           gst_clapper_set_suburi_internal, self, NULL);
       break;
     }
-    case PROP_VOLUME:
+    case PROP_VOLUME: {
-      GST_DEBUG_OBJECT (self, "Set volume=%lf", g_value_get_double (value));
+      GValue volume_linear = G_VALUE_INIT;
-      g_object_set_property (G_OBJECT (self->playbin), "volume", value);
+      gdouble volume = g_value_get_double (value);
+
+      GST_DEBUG_OBJECT (self, "Set volume=%lf", volume);
+      volume = gst_stream_volume_convert_volume (
+          GST_STREAM_VOLUME_FORMAT_CUBIC, GST_STREAM_VOLUME_FORMAT_LINEAR, volume);
+      GST_DEBUG_OBJECT (self, "Converted linear volume=%lf", volume);
+
+      g_value_init (&volume_linear, G_TYPE_DOUBLE);
+      g_value_set_double (&volume_linear, volume);
+      g_object_set_property (G_OBJECT (self->playbin), "volume", &volume_linear);
+
+      g_value_unset (&volume_linear);
       break;
+    }
     case PROP_RATE:
       g_mutex_lock (&self->lock);
       self->rate = g_value_get_double (value);
@@ -757,11 +770,17 @@ gst_clapper_get_property (GObject * object, guint prop_id,
       g_value_take_object (value, subtitle_info);
       break;
     }
-    case PROP_VOLUME:
+    case PROP_VOLUME: {
+      gdouble volume;
+
       g_object_get_property (G_OBJECT (self->playbin), "volume", value);
-      GST_TRACE_OBJECT (self, "Returning volume=%lf",
+      volume = g_value_get_double (value);
-          g_value_get_double (value));
+      volume = gst_stream_volume_convert_volume (
+          GST_STREAM_VOLUME_FORMAT_LINEAR, GST_STREAM_VOLUME_FORMAT_CUBIC, volume);
+      g_value_set_double (value, volume);
+      GST_TRACE_OBJECT (self, "Returning volume=%lf", volume);
       break;
+    }
     case PROP_RATE:
       g_mutex_lock (&self->lock);
       g_value_set_double (value, self->rate);

src/controls.js

@@ -489,7 +489,7 @@ class ClapperControls extends Gtk.Box
 
         const initialVolume = (settings.get_string('volume-initial') === 'custom')
             ? settings.get_int('volume-value') / 100
-            : Misc.getCubicValue(settings.get_double('volume-last'));
+            : settings.get_double('volume-last');
 
         this.volumeScale.set_value(initialVolume);
     }
@@ -567,10 +567,9 @@ class ClapperControls extends Gtk.Box
     _onVolumeScaleValueChanged(scale)
     {
         const volume = scale.get_value();
-        const linearVolume = Misc.getLinearValue(volume);
         const { player } = this.get_ancestor(Gtk.Grid);
 
-        player.set_volume(linearVolume);
+        player.set_volume(volume);
 
         /* FIXME: All of below should be placed in 'volume-changed'
          *  event once we move to message bus API */

src/misc.js

@@ -95,21 +95,3 @@ function getFormattedTime(time, showHours)
     const parsed = (hours) ? `${hours}:` : '';
     return parsed + `${minutes}:${seconds}`;
 }
-
-function getCubicValue(linearVal)
-{
-    return GstAudio.StreamVolume.convert_volume(
-        GstAudio.StreamVolumeFormat.LINEAR,
-        GstAudio.StreamVolumeFormat.CUBIC,
-        linearVal
-    );
-}
-
-function getLinearValue(cubicVal)
-{
-    return GstAudio.StreamVolume.convert_volume(
-        GstAudio.StreamVolumeFormat.CUBIC,
-        GstAudio.StreamVolumeFormat.LINEAR,
-        cubicVal
-    );
-}

src/player.js

@@ -24,8 +24,6 @@ class ClapperPlayer extends PlayerBase
 
         this.keyPressCount = 0;
 
-        this._maxVolume = Misc.getLinearValue(Misc.maxVolume);
-
         const keyController = new Gtk.EventControllerKey();
         keyController.connect('key-pressed', this._onWidgetKeyPressed.bind(this));
         keyController.connect('key-released', this._onWidgetKeyReleased.bind(this));
@@ -180,17 +178,6 @@ class ClapperPlayer extends PlayerBase
         this.seek_seconds(seconds);
     }
 
-    set_volume(volume)
-    {
-        if(volume < 0)
-            volume = 0;
-        else if(volume > this._maxVolume)
-            volume = this._maxVolume;
-
-        super.set_volume(volume);
-        debug(`set player volume: ${volume}`);
-    }
-
     adjust_position(isIncrease)
     {
         this.seek_done = false;
@@ -316,7 +303,9 @@ class ClapperPlayer extends PlayerBase
             }
             settings.set_string('resume-database', JSON.stringify([resumeInfo]));
         }
-        settings.set_double('volume-last', this.volume);
+        const volume = this.volume;
+        debug(`saving last volume: ${volume}`);
+        settings.set_double('volume-last', volume);
 
         clapperWidget.controls._onCloseRequest();
     }

src/widget.js

@@ -530,7 +530,7 @@ class ClapperWidget extends Gtk.Grid
 
     _onPlayerVolumeChanged(player)
     {
-        const volume = player.get_volume();
+        const volume = player.volume;
 
         /* FIXME: This check should not be needed, GstPlayer should not
          * emit 'volume-changed' with the same values, but it does. */
@@ -540,8 +540,7 @@ class ClapperWidget extends Gtk.Grid
         /* Once above is fixed in GstPlayer, remove this var too */
         this.controls.currentVolume = volume;
 
-        const cubicVolume = Misc.getCubicValue(volume);
+        this.controls._updateVolumeButtonIcon(volume);
-        this.controls._updateVolumeButtonIcon(cubicVolume);
     }
 
     _onStateNotify(toplevel)