package/majestic-af: build the out-of-core autofocus plugin from source

br-ext-chip-hisilicon/configs/hi3516ev300_lite_defconfig

@@ -56,6 +56,7 @@ BR2_PACKAGE_LIBOGG_OPENIPC=y
 BR2_PACKAGE_MAJESTIC_FONTS=y
 BR2_PACKAGE_MAJESTIC_WEBUI=y
 BR2_PACKAGE_MAJESTIC=y
+BR2_PACKAGE_MAJESTIC_AF=y
 BR2_PACKAGE_MBEDTLS_OPENIPC=y
 BR2_PACKAGE_MOTORS=y
 BR2_PACKAGE_OPUS_OPENIPC=y

general/package/Config.in

@@ -67,6 +67,7 @@ source "$BR2_EXTERNAL_GENERAL_PATH/package/linux-patcher/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/majestic-fonts/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/majestic-webui/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/majestic/Config.in"
+source "$BR2_EXTERNAL_GENERAL_PATH/package/majestic-af/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/matter/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/mavfwd/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/mbedtls-openipc/Config.in"

general/package/majestic-af/Config.in

@@ -0,0 +1,11 @@
+config BR2_PACKAGE_MAJESTIC_AF
+	bool "majestic-af"
+	depends on BR2_PACKAGE_MAJESTIC
+	help
+	  Out-of-core autofocus / PTZ engine plugin for majestic, compiled
+	  from source. majestic loads /usr/lib/majestic-af.so at runtime when
+	  autofocus is enabled and the majestic binary exports the plugin HAL
+	  seams; the contrast search, the motorized-lens UART actuator (XiongMai
+	  near-Pelco and standard Pelco-D), and the worker threads live here.
+
+	  https://github.com/OpenIPC/majestic-af

general/package/majestic-af/majestic-af.mk

@@ -0,0 +1,31 @@
+################################################################################
+#
+# majestic-af
+#
+################################################################################
+
+MAJESTIC_AF_SITE = $(call github,openipc,majestic-af,$(MAJESTIC_AF_VERSION))
+MAJESTIC_AF_VERSION = 7caebdc6289347a04cadbf48894600858f45ae69
+
+MAJESTIC_AF_LICENSE = MIT
+MAJESTIC_AF_LICENSE_FILES = LICENSE
+
+# Out-of-core autofocus / PTZ engine for majestic: one shared object majestic
+# dlopen()s at runtime. The HAL seams it calls (sdk_get_focus_value, ...) are
+# left UNDEFINED here and resolve against the majestic executable at dlopen, so
+# this links nothing from majestic — only its own vendored headers. majestic must
+# be built with plugin-symbol export (WITH_PLUGINS_SUPPORT) for those to resolve;
+# the plugin otherwise fails to load and majestic keeps working without it.
+define MAJESTIC_AF_BUILD_CMDS
+	$(TARGET_CC) $(TARGET_CFLAGS) -std=gnu99 -fPIC -shared \
+		-DFILE_BASENAME=\"majestic-af\" \
+		-I$(@D)/include \
+		$(@D)/src/plugin.c $(@D)/src/engine.c $(@D)/src/af2.c \
+		-o $(@D)/majestic-af.so
+endef
+
+define MAJESTIC_AF_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 0644 -D $(@D)/majestic-af.so $(TARGET_DIR)/usr/lib/majestic-af.so
+endef
+
+$(eval $(generic-package))