fix the volume conversion upon user interaction

move the conversion formula to a new method in core.util.Converter

3 files changed, 21 insertions, 27 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/activity/MediaplayerActivity.java b/app/src/main/java/de/danoeh/antennapod/activity/MediaplayerActivity.java
index e890f03b7..bad6bdf0a 100644
--- a/app/src/main/java/de/danoeh/antennapod/activity/MediaplayerActivity.java
+++ b/app/src/main/java/de/danoeh/antennapod/activity/MediaplayerActivity.java
@@ -493,14 +493,9 @@ public abstract class MediaplayerActivity extends AppCompatActivity implements O
                         barLeftVolume.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
                             @Override
                             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
-                                float leftVolume = 1.0f, rightVolume = 1.0f;
-                                if (progress < 100) {
-                                    leftVolume = progress / 100.0f;
-                                }
-                                if (barRightVolume.getProgress() < 100) {
-                                    rightVolume = barRightVolume.getProgress() / 100.0f;
-                                }
-                                controller.setVolume(leftVolume, rightVolume);
+                                controller.setVolume(
+                                        Converter.getVolumeFromPercentage(progress),
+                                        Converter.getVolumeFromPercentage(barRightVolume.getProgress()));
                             }
 
                             @Override
@@ -514,14 +509,9 @@ public abstract class MediaplayerActivity extends AppCompatActivity implements O
                         barRightVolume.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
                             @Override
                             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
-                                float leftVolume = 1.0f, rightVolume = 1.0f;
-                                if (progress < 100) {
-                                    rightVolume = progress / 100.0f;
-                                }
-                                if (barLeftVolume.getProgress() < 100) {
-                                    leftVolume = barLeftVolume.getProgress() / 100.0f;
-                                }
-                                controller.setVolume(leftVolume, rightVolume);
+                                controller.setVolume(
+                                        Converter.getVolumeFromPercentage(barLeftVolume.getProgress()),
+                                        Converter.getVolumeFromPercentage(progress));
                             }
 
                             @Override
diff --git a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
index 6c0aff15e..293514ec7 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
@@ -29,6 +29,7 @@ import de.danoeh.antennapod.core.storage.APCleanupAlgorithm;
 import de.danoeh.antennapod.core.storage.APNullCleanupAlgorithm;
 import de.danoeh.antennapod.core.storage.APQueueCleanupAlgorithm;
 import de.danoeh.antennapod.core.storage.EpisodeCleanupAlgorithm;
+import de.danoeh.antennapod.core.util.Converter;
 
 /**
  * Provides access to preferences set by the user in the settings screen. A
@@ -260,20 +261,12 @@ public class UserPreferences {
 
     public static float getLeftVolume() {
         int volume = prefs.getInt(PREF_LEFT_VOLUME, 100);
-        if(volume == 100) {
-            return 1.0f;
-        } else {
-            return (float) (1 - (Math.log(100 - volume) / Math.log(100)));
-        }
+        return Converter.getVolumeFromPercentage(volume);
     }
 
     public static float getRightVolume() {
         int volume = prefs.getInt(PREF_RIGHT_VOLUME, 100);
-        if(volume == 100) {
-            return 1.0f;
-        } else {
-            return (float) (1 - (Math.log(100 - volume) / Math.log(100)));
-        }
+        return Converter.getVolumeFromPercentage(volume);
     }
 
     public static boolean shouldPauseForFocusLoss() {
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/Converter.java b/core/src/main/java/de/danoeh/antennapod/core/util/Converter.java
index 1b929b214..74fb9e709 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/Converter.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/Converter.java
@@ -118,5 +118,16 @@ public final class Converter {
         result += minutes;
         return result;
     }
-    
+
+    /**
+     * Converts the volume as read as the progress from a SeekBar scaled to 100 and as saved in
+     * UserPreferences to the format taken by setVolume methods.
+     * @param progress integer between 0 to 100 taken from the SeekBar progress
+     * @return the appropriate volume as float taken by setVolume methods
+     */
+    public static float getVolumeFromPercentage(int progress){
+        if (progress==100)
+            return 1f;
+        return (float) (1 - (Math.log(101 - progress) / Math.log(101)));
+    }
 }