Make video sizing consistent with images (#8102)

* Make video sizing consistent with images

* Test suggestedSize

* Constrain width of media in large mode

test/settings/enums/ImageSize-test.ts

@@ -0,0 +1,38 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { ImageSize, suggestedSize } from "../../../src/settings/enums/ImageSize";
+
+describe("ImageSize", () => {
+    describe("suggestedSize", () => {
+        it("constrains width", () => {
+            const size = suggestedSize(ImageSize.Normal, { w: 648, h: 162 });
+            expect(size).toStrictEqual({ w: 324, h: 81 });
+        });
+        it("constrains height", () => {
+            const size = suggestedSize(ImageSize.Normal, { w: 162, h: 648 });
+            expect(size).toStrictEqual({ w: 81, h: 324 });
+        });
+        it("constrains width in large mode", () => {
+            const size = suggestedSize(ImageSize.Large, { w: 2400, h: 1200 });
+            expect(size).toStrictEqual({ w: 800, h: 400 });
+        });
+        it("returns max values if content size is not specified", () => {
+            const size = suggestedSize(ImageSize.Normal, { w: null, h: null });
+            expect(size).toStrictEqual({ w: 324, h: 324 });
+        });
+    });
+});