Fill empty space with blurred cover art

app/src/main/java/net/nullsum/audinaut/fragments/NowPlayingFragment.java

@@ -87,6 +87,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
     private TextView emptyTextView;
     private TextView songTitleTextView;
     private ImageView albumArtImageView;
+    private ImageView albumArtBackgroundView;
     private RecyclerView playlistView;
     private TextView positionTextView;
     private TextView durationTextView;
@@ -151,6 +152,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
         emptyTextView = rootView.findViewById(R.id.download_empty);
         songTitleTextView = rootView.findViewById(R.id.download_song_title);
         albumArtImageView = rootView.findViewById(R.id.download_album_art_image);
+        albumArtBackgroundView = rootView.findViewById(R.id.download_album_art_background);
         positionTextView = rootView.findViewById(R.id.download_position);
         durationTextView = rootView.findViewById(R.id.download_duration);
         statusTextView = rootView.findViewById(R.id.download_status);
@@ -516,6 +518,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
         }
 
         if (currentPlaying == null && downloadService != null && currentPlaying == downloadService.getCurrentPlaying()) {
+            getImageLoader().loadBlurImage(albumArtBackgroundView, null, true, false);
             getImageLoader().loadImage(albumArtImageView, null, true, false);
         }
 
@@ -804,6 +807,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
         if (currentPlaying != null) {
             Entry song = currentPlaying.getSong();
             songTitleTextView.setText(song.getTitle());
+            getImageLoader().loadBlurImage(albumArtBackgroundView, song, true, true);
             getImageLoader().loadImage(albumArtImageView, song, true, true);
 
             DownloadService downloadService = getDownloadService();
@@ -814,6 +818,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
             }
         } else {
             songTitleTextView.setText(null);
+            getImageLoader().loadBlurImage(albumArtBackgroundView, null, true, false);
             getImageLoader().loadImage(albumArtImageView, null, true, false);
             setSubtitle(null);
         }
@@ -939,6 +944,7 @@ public class NowPlayingFragment extends SubsonicFragment implements OnGestureLis
     @Override
     public void onMetadataUpdate(Entry song, int fieldChange) {
         if (song != null && albumArtImageView != null && fieldChange == DownloadService.METADATA_UPDATED_COVER_ART) {
+            getImageLoader().loadBlurImage(albumArtBackgroundView, song, true, true);
             getImageLoader().loadImage(albumArtImageView, song, true, true);
         }
     }

app/src/main/java/net/nullsum/audinaut/util/BlurBuilder.java

@@ -0,0 +1,32 @@
+package net.nullsum.audinaut.util;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.renderscript.Allocation;
+import android.renderscript.Element;
+import android.renderscript.RenderScript;
+import android.renderscript.ScriptIntrinsicBlur;
+
+class BlurBuilder {
+    private static final float BITMAP_SCALE = 0.4f;
+    private static final float BLUR_RADIUS = 25f;
+
+    public static Bitmap blur(Context context, Bitmap image) {
+        int width = Math.round(image.getWidth() * BITMAP_SCALE);
+        int height = Math.round(image.getHeight() * BITMAP_SCALE);
+
+        Bitmap inputBitmap = Bitmap.createScaledBitmap(image, width, height, false);
+        Bitmap outputBitmap = Bitmap.createBitmap(inputBitmap);
+
+        RenderScript rs = RenderScript.create(context);
+        ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
+        Allocation tmpIn = Allocation.createFromBitmap(rs, inputBitmap);
+        Allocation tmpOut = Allocation.createFromBitmap(rs, outputBitmap);
+        theIntrinsic.setRadius(BLUR_RADIUS);
+        theIntrinsic.setInput(tmpIn);
+        theIntrinsic.forEach(tmpOut);
+        tmpOut.copyTo(outputBitmap);
+
+        return outputBitmap;
+    }
+}

app/src/main/java/net/nullsum/audinaut/util/ImageLoader.java

@@ -209,10 +209,19 @@ public class ImageLoader {
 
     public SilentBackgroundTask loadImage(View view, MusicDirectory.Entry entry, boolean large, boolean crossfade) {
         int size = large ? imageSizeLarge : imageSizeDefault;
-        return loadImage(view, entry, large, size, crossfade);
+        return loadImage(view, entry, large, size, crossfade, false);
     }
 
-    public SilentBackgroundTask loadImage(View view, MusicDirectory.Entry entry, boolean large, int size, boolean crossfade) {
+    public void loadBlurImage(View view, MusicDirectory.Entry entry, boolean large, boolean crossfade) {
+        int size = large ? imageSizeLarge : imageSizeDefault;
+        loadImage(view, entry, large, size, crossfade, true);
+    }
+
+    public void loadImage(View view, MusicDirectory.Entry entry, boolean large, int size, boolean crossfade) {
+        loadImage(view, entry, large, size, crossfade, false);
+    }
+
+    private SilentBackgroundTask loadImage(View view, MusicDirectory.Entry entry, boolean large, int size, boolean crossfade, boolean blur) {
         // If we know this a artist, try to load artist info instead
         if (entry != null && !entry.isAlbum() && !Util.isOffline(context)) {
             SilentBackgroundTask task = new ArtistImageTask(view.getContext(), entry, size, large, view, crossfade);
@@ -229,12 +238,18 @@ public class ImageLoader {
         Bitmap bitmap;
         if (entry == null || entry.getCoverArt() == null) {
             bitmap = getUnknownImage(entry, size);
+            if (blur) {
+                bitmap = BlurBuilder.blur(context, bitmap);
+            }
             setImage(view, Util.createDrawableFromBitmap(context, bitmap), crossfade);
             return null;
         }
 
         bitmap = cache.get(getKey(entry.getCoverArt(), size));
         if (bitmap != null && !bitmap.isRecycled()) {
+            if (blur) {
+                bitmap = BlurBuilder.blur(context, bitmap);
+            }
             final Drawable drawable = Util.createDrawableFromBitmap(this.context, bitmap);
             setImage(view, drawable, crossfade);
             if (large) {
@@ -246,7 +261,7 @@ public class ImageLoader {
         if (!large) {
             setImage(view, null, false);
         }
-        ImageTask task = new ViewImageTask(view.getContext(), entry, size, large, view, crossfade);
+        ImageTask task = new ViewImageTask(view.getContext(), entry, size, large, view, crossfade, blur);
         task.execute();
         return task;
     }
@@ -322,14 +337,16 @@ public class ImageLoader {
         private final Context mContext;
         private final int mSize;
         private final boolean mIsNowPlaying;
+        private final boolean mBlur;
         Drawable mDrawable;
 
-        public ImageTask(Context context, MusicDirectory.Entry entry, int size, boolean isNowPlaying) {
+        public ImageTask(Context context, MusicDirectory.Entry entry, int size, boolean isNowPlaying, boolean blur) {
             super(context);
             mContext = context;
             mEntry = entry;
             mSize = size;
             mIsNowPlaying = isNowPlaying;
+            mBlur = blur;
         }
 
         @Override
@@ -348,7 +365,9 @@ public class ImageLoader {
                 } else {
                     bitmap = getUnknownImage(mEntry, mSize);
                 }
-
+                if (mBlur) {
+                    bitmap = BlurBuilder.blur(context, bitmap);
+                }
                 mDrawable = Util.createDrawableFromBitmap(mContext, bitmap);
             } catch (Throwable x) {
                 Log.e(TAG, "Failed to download album art.", x);
@@ -363,8 +382,8 @@ public class ImageLoader {
         final boolean mCrossfade;
         private final View mView;
 
-        public ViewImageTask(Context context, MusicDirectory.Entry entry, int size, boolean isNowPlaying, View view, boolean crossfade) {
+        public ViewImageTask(Context context, MusicDirectory.Entry entry, int size, boolean isNowPlaying, View view, boolean crossfade, boolean blur) {
-            super(context, entry, size, isNowPlaying);
+            super(context, entry, size, isNowPlaying, blur);
 
             mView = view;
             mCrossfade = crossfade;
@@ -409,7 +428,7 @@ public class ImageLoader {
                 }
 
                 if (mEntry != null && mEntry.getCoverArt() != null) {
-                    subTask = new ViewImageTask(mContext, mEntry, mSize, mIsNowPlaying, mView, mCrossfade);
+                    subTask = new ViewImageTask(mContext, mEntry, mSize, mIsNowPlaying, mView, mCrossfade, false);
                 } else {
                     // If entry is null as well, we need to just set as a blank image
                     Bitmap bitmap = getUnknownImage(mEntry, mSize);

app/src/main/res/layout-port/download.xml

@@ -20,22 +20,25 @@
                 android:background="@android:color/transparent"
                 android:orientation="vertical">
 
-                <FrameLayout
+                <RelativeLayout
                     android:layout_width="match_parent"
                     android:layout_height="0dp"
                     android:layout_weight="1">
 
-                    <FrameLayout
+                    <net.nullsum.audinaut.view.RecyclingImageView
+                        android:id="@+id/download_album_art_background"
                         android:layout_width="match_parent"
                         android:layout_height="match_parent"
-                        android:orientation="vertical">
+                        android:scaleType="centerCrop" />
 
                     <net.nullsum.audinaut.view.RecyclingImageView
                         android:id="@+id/download_album_art_image"
-                            android:layout_width="wrap_content"
+                        android:layout_width="match_parent"
                         android:layout_height="match_parent"
                         android:scaleType="fitCenter" />
 
+                </RelativeLayout>
+
                 <LinearLayout
                     android:id="@+id/download_overlay_buttons"
                     android:layout_width="match_parent"
@@ -45,8 +48,6 @@
                     android:gravity="center"
                     android:orientation="horizontal"
                     android:visibility="invisible" />
-                    </FrameLayout>
-                </FrameLayout>
 
                 <TextView
                     android:id="@+id/download_status"