Pick preview mode closest to screen size

src/io_pipeline.c

@@ -18,7 +18,6 @@ mp_state_io state_io;
 
 MPCamera *mpcamera = NULL;
 
-
 static MPPipeline *pipeline;
 static GSource *capture_source;
 
@@ -403,11 +402,23 @@ update_state(MPPipeline *pipeline, const struct mp_io_pipeline_state *state)
                         mpcamera = mp_camera_new(state_io.camera);
                         state_io.mode_preview = NULL;
                         state_io.mode_capture = NULL;
+                        float score = 0;
+                        int area_preview =
+                                state_io.preview_width * state_io.preview_height;
                         for (int m = 0; m < state_io.camera->num_modes; m++) {
+                                float mscore = 0;
                                 if (state_io.camera->modes[m]->rate > 29) {
+                                        mscore += 1;
+                                }
+                                int mode_area = state_io.camera->modes[m]->width *
+                                                state_io.camera->modes[m]->height;
+                                mscore += 1.0f -
+                                          (float)(ABS(mode_area - area_preview) /
+                                                  area_preview);
+                                if (mscore > score) {
                                         state_io.mode_preview =
                                                 state_io.camera->modes[m];
-                                        break;
+                                        score = mscore;
                                 }
                         }
                         long area = 0;