Add Ctrl+i shortcut to enable/disable FPS counter

Disable FPS counter on start, and use Ctrl+i to enable/disable it.

app/src/inputmanager.c

@@ -1,6 +1,7 @@
 #include "inputmanager.h"
 
 #include "convert.h"
+#include "lockutil.h"
 #include "log.h"
 
 static struct point get_mouse_point(void) {
@@ -78,6 +79,18 @@ static void turn_screen_on(struct controller *controller) {
     }
 }
 
+static void switch_fps_counter_state(struct frames *frames) {
+    mutex_lock(frames->mutex);
+    if (frames->fps_counter.started) {
+        LOGI("FPS counter stopped");
+        fps_counter_stop(&frames->fps_counter);
+    } else {
+        LOGI("FPS counter started");
+        fps_counter_start(&frames->fps_counter);
+    }
+    mutex_unlock(frames->mutex);
+}
+
 void input_manager_process_text_input(struct input_manager *input_manager,
                                       const SDL_TextInputEvent *event) {
     if (is_ctrl_down()) {
@@ -143,6 +156,9 @@ void input_manager_process_key(struct input_manager *input_manager,
             case SDLK_g:
                 screen_resize_to_pixel_perfect(input_manager->screen);
                 return;
+            case SDLK_i:
+                switch_fps_counter_state(input_manager->frames);
+                return;
         }
 
         return;

app/src/inputmanager.h

@@ -3,10 +3,13 @@
 
 #include "common.h"
 #include "controller.h"
+#include "fpscounter.h"
+#include "frames.h"
 #include "screen.h"
 
 struct input_manager {
     struct controller *controller;
+    struct frames *frames;
     struct screen *screen;
 };
 

app/src/main.c

@@ -82,6 +82,9 @@ static void usage(const char *arg0) {
         "\n"
         "    Right-click\n"
         "        turn screen on\n"
+        "\n"
+        "    Ctrl+i\n"
+        "        enable/disable FPS counter (print frames/second in logs)\n"
         "\n",
         arg0,
         DEFAULT_BIT_RATE,

app/src/scrcpy.c

@@ -32,6 +32,7 @@ static struct controller controller;
 
 static struct input_manager input_manager = {
     .controller = &controller,
+    .frames = &frames,
     .screen = &screen,
 };
 
@@ -50,7 +51,6 @@ static void event_loop(void) {
                     screen.has_frame = SDL_TRUE;
                     // this is the very first frame, show the window
                     screen_show_window(&screen);
-                    fps_counter_start(&frames.fps_counter);
                 }
                 if (!screen_update_frame(&screen, &frames)) {
                     return;