backend: Use an array for the smart resize config

The smart resize config block does not need to be stored in a vector as
it will remain statically sized.

Signed-off-by: Naushir Patuck <[email protected]>

Author: naushir

src/libpisp/backend/backend.cpp

@@ -23,7 +23,6 @@ BackEnd::BackEnd(Config const &config, PiSPVariant const &variant)
 	if (config_.max_tile_width > max_tile_width)
 		PISP_LOG(fatal, "Configured max tile width " << config_.max_tile_width << " exceeds " << max_tile_width);
 
-	smart_resize_.resize(2, { 0, 0 });
 	smart_resize_dirty_ = 0;
 
 	const char *env = std::getenv("LIBPISP_BE_CONFIG_FILE");

src/libpisp/backend/backend.hpp

@@ -7,6 +7,7 @@
  */
 #pragma once
 
+#include <array>
 #include <cstdint>
 #include <string>
 #include <type_traits>
@@ -51,8 +52,8 @@ class BackEnd final
 
 	struct SmartResize
 	{
-		uint16_t width;
-		uint16_t height;
+		uint16_t width = 0;
+		uint16_t height = 0;
 	};
 
 	BackEnd(Config const &user_config, PiSPVariant const &variant);
@@ -181,7 +182,7 @@ class BackEnd final
 	std::vector<pisp_tile> tiles_;
 	int num_tiles_x_, num_tiles_y_;
 	mutable ShmMutex mutex_;
-	std::vector<SmartResize> smart_resize_;
+	std::array<SmartResize, PISP_BACK_END_NUM_OUTPUTS> smart_resize_;
 	uint32_t smart_resize_dirty_;
 
 	// Default config