feat: Background as video support

Makefile

@@ -9,32 +9,38 @@ PKG_CONFIG ?= pkg-config
 
 SDL_CFLAGS := $(shell $(PKG_CONFIG) --cflags sdl2 SDL2_image)
 SDL_LIBS := $(shell $(PKG_CONFIG) --libs sdl2 SDL2_image)
+FFMPEG_CFLAGS := $(shell $(PKG_CONFIG) --cflags libavformat libavcodec libswscale libavutil)
+FFMPEG_LIBS := $(shell $(PKG_CONFIG) --libs libavformat libavcodec libswscale libavutil)
 
-ALL_CFLAGS := $(CFLAGS) $(SDL_CFLAGS)
-ALL_LIBS := $(LIBS) $(SDL_LIBS) -lm
+ALL_CFLAGS := $(CFLAGS) $(SDL_CFLAGS) $(FFMPEG_CFLAGS)
+ALL_LIBS := $(LIBS) $(SDL_LIBS) $(FFMPEG_LIBS) -lm
 
-TARGET = gsplash
+BUILD_DIR ?= build
+TARGET = $(BUILD_DIR)/gsplash
 SRC = src/gsplash.c
 
 .PHONY: all clean install uninstall check
 
 all: $(TARGET)
 
-$(TARGET): $(SRC)
-	$(CC) $(ALL_CFLAGS) $(LDFLAGS) $< -o $@ $(ALL_LIBS)
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+$(TARGET): $(BUILD_DIR) $(SRC)
+	$(CC) $(ALL_CFLAGS) $(LDFLAGS) $(SRC) -o $@ $(ALL_LIBS)
 
 # Lightweight smoke test (headless via SDL_VIDEODRIVER=dummy)
 check: $(TARGET)
 	@echo "Running smoke test (headless)..."
-	SDL_VIDEODRIVER=dummy ./$(TARGET) nonexistent.png /bin/true || true
+	SDL_VIDEODRIVER=dummy $(TARGET) nonexistent.png /bin/true || true
 	@echo "Smoke test finished"
 
 install: $(TARGET)
 	install -d "$(DESTDIR)$(bindir)"
-	install -m 755 $(TARGET) "$(DESTDIR)$(bindir)/$(TARGET)"
+	install -m 755 $(TARGET) "$(DESTDIR)$(bindir)/gsplash"
 
 uninstall:
-	rm -f "$(DESTDIR)$(bindir)/$(TARGET)"
+	rm -f "$(DESTDIR)$(bindir)/gsplash"
 
 clean:
 	rm -f $(TARGET)