Resolution: slightly change the calculation

docs/api/resolution.md

 
 | Resolution | 16:9 landscape | 16:10 landscape | 4:3 landscape | Notes |
 | ---------- | -------------- | --------------- | ------------- | ----- |
-| `"xs"` | 212x120 | 192x120 | 160x120 | |
-| `"xs+"` | 284x160 | 256x160 | 212x160 | |
+| `"xs"` | 214x120 | 192x120 | 160x120 | |
+| `"xs+"` | 284x160 | 256x160 | 214x160 | |
 | `"sm"` | 356x200 | 320x200 | 266x200 | |
-| `"sm+"` | 426x240 | 384x240 | 320x240 | |
+| `"sm+"` | 426x240 | 384x240 | 320x240 | 240p |
 | `"md"` | 568x320 | 512x320 | 426x320 | |
-| `"md+"` | 640x360 | 576x360 | 480x360 | |
-| `"lg"` | 852x480 | 768x480 | 640x480 | 480p |
+| `"md+"` | 640x360 | 576x360 | 480x360 | 360p |
+| `"lg"` | 854x480 | 768x480 | 640x480 | 480p |
 | `"lg+"` | 1066x600 | 960x600 | 800x600 | |
 | `"xl"` | 1280x720 | 1152x720 | 960x720 | 720p |
-| `"xl+"` | 1364x768 | 1228x768 | 1024x768 | |
+| `"xl+"` | 1366x768 | 1228x768 | 1024x768 | |
 | `"xxl"` | 1600x900 | 1440x900 | 1200x900 | |
 | `"xxl+"` | 1706x960 | 1536x960 | 1280x960 | 960p |

src/utils/resolution.ts

     if(aspectRatio >= 1) {
         // landscape
         height = referenceHeight;
-        width = Math.round(height * aspectRatio);
-        width -= width % 2;
+        width = Math.floor(height * aspectRatio);
+        width += width % 2;
     }
     else {
         // portrait
         width = referenceHeight;
-        height = Math.round(width / aspectRatio);
-        height -= height % 2;
+        height = Math.floor(width / aspectRatio);
+        height += height % 2;
     }
 
     return Speedy.Size(width, height);