feat: match IINA screenshot geometry and controls

Sources/Core/player.cpp

@@ -179,6 +179,12 @@ struct Player {
         state.duration = duration;
         state.has_audio = tracks[0].codec != nullptr;
         state.has_video = tracks[1].codec != nullptr;
+        state.video_aspect_ratio = 0;
+        if (const auto *video = tracks[1].codec; video && video->width > 0 && video->height > 0) {
+            const auto aspect = av_guess_sample_aspect_ratio(format, format->streams[tracks[1].index], nullptr);
+            state.video_aspect_ratio = double(video->width) / video->height *
+                (aspect.num > 0 && aspect.den > 0 ? av_q2d(aspect) : 1);
+        }
         std::memcpy(state.error, error.data(), error.size());
         ++state.revision;
     }

Sources/Core/player.h

@@ -17,6 +17,8 @@ typedef struct PlayerState {
     double duration;
     bool has_audio;
     bool has_video;
+    // Display width / height, including sample aspect ratio; zero without video.
+    double video_aspect_ratio;
     uint64_t revision;
     char error[512];
 } PlayerState;