win-capture: Fix game capture acquiring issue

If capture starts too quickly, the file mapping will return 2, which
means file not found, and it would then reset the capture and try again.
Sometimes this would result in long intervals where it wouldn't capture.
This fixes the issue by simply making game capture retry if file mapping
returns error number 2.

plugins/win-capture/game-capture.c

@@ -798,7 +798,13 @@ static inline bool init_events(struct game_capture *gc)
 	return true;
 }
 
-static inline bool init_capture_data(struct game_capture *gc)
+enum capture_result {
+	CAPTURE_FAIL,
+	CAPTURE_RETRY,
+	CAPTURE_SUCCESS
+};
+
+static inline enum capture_result init_capture_data(struct game_capture *gc)
 {
 	char name[64];
 	sprintf(name, "%s%u", SHMEM_TEXTURE, gc->global_hook_info->map_id);
@@ -818,14 +824,12 @@ static inline bool init_capture_data(struct game_capture *gc)
 	if (!gc->hook_data_map) {
 		DWORD error = GetLastError();
 		if (error == 2) {
-			info("init_capture_data: file mapping not found, "
-			     "retrying.  (this is often normal, and may take "
-			     "a few tries)");
+			return CAPTURE_RETRY;
 		} else {
 			warn("init_capture_data: failed to open file "
 			     "mapping: %lu", error);
 		}
-		return false;
+		return CAPTURE_FAIL;
 	}
 
 	gc->data = MapViewOfFile(gc->hook_data_map, FILE_MAP_ALL_ACCESS, 0, 0,
@@ -833,10 +837,10 @@ static inline bool init_capture_data(struct game_capture *gc)
 	if (!gc->data) {
 		warn("init_capture_data: failed to map data view: %lu",
 				GetLastError());
-		return false;
+		return CAPTURE_FAIL;
 	}
 
-	return true;
+	return CAPTURE_SUCCESS;
 }
 
 #define PIXEL_16BIT_SIZE 2
@@ -1030,9 +1034,6 @@ static bool start_capture(struct game_capture *gc)
 	if (!init_events(gc)) {
 		return false;
 	}
-	if (!init_capture_data(gc)) {
-		return false;
-	}
 	if (gc->global_hook_info->type == CAPTURE_TYPE_MEMORY) {
 		if (!init_shmem_capture(gc)) {
 			return false;
@@ -1084,8 +1085,12 @@ static void game_capture_tick(void *data, float seconds)
 	}
 
 	if (gc->hook_ready && object_signalled(gc->hook_ready)) {
-		gc->capturing = start_capture(gc);
-		if (!gc->capturing) {
+		enum capture_result result = init_capture_data(gc);
+
+		if (result == CAPTURE_SUCCESS)
+			gc->capturing = start_capture(gc);
+
+		if (result != CAPTURE_RETRY && !gc->capturing) {
 			gc->retry_interval = ERROR_RETRY_INTERVAL;
 			stop_capture(gc);
 		}