support flutter gstreamer player for android

gst_player/Android.mk

@@ -0,0 +1,37 @@
+LOCAL_CPP_EXTENSION := .cxx .cpp .cc
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE    := flutter_gstreamer_player_plugin_android
+LOCAL_SRC_FILES := flutter_gstreamer_player_plugin_android.cc gst_player.cc
+# LOCAL_STATIC_LIBRARIES := android_native_app_glue
+LOCAL_SHARED_LIBRARIES := gstreamer_android
+LOCAL_LDLIBS := -llog -landroid
+include $(BUILD_SHARED_LIBRARY)
+
+ifndef GSTREAMER_ROOT_ANDROID
+$(error GSTREAMER_ROOT_ANDROID is not defined!)
+endif
+
+ifeq ($(TARGET_ARCH_ABI),armeabi)
+GSTREAMER_ROOT        := $(GSTREAMER_ROOT_ANDROID)/arm
+else ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
+GSTREAMER_ROOT        := $(GSTREAMER_ROOT_ANDROID)/armv7
+else ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
+GSTREAMER_ROOT        := $(GSTREAMER_ROOT_ANDROID)/arm64
+else ifeq ($(TARGET_ARCH_ABI),x86)
+GSTREAMER_ROOT        := $(GSTREAMER_ROOT_ANDROID)/x86
+else ifeq ($(TARGET_ARCH_ABI),x86_64)
+GSTREAMER_ROOT        := $(GSTREAMER_ROOT_ANDROID)/x86_64
+else
+$(error Target arch ABI not supported: $(TARGET_ARCH_ABI))
+endif
+
+GSTREAMER_NDK_BUILD_PATH  := $(GSTREAMER_ROOT)/share/gst-android/ndk-build/
+include $(GSTREAMER_NDK_BUILD_PATH)/plugins.mk
+GSTREAMER_PLUGINS         := $(GSTREAMER_PLUGINS_CORE) ${GSTREAMER_PLUGINS_CODECS} ${GSTREAMER_PLUGINS_ENCODING} ${GSTREAMER_PLUGINS_NET} ${GSTREAMER_PLUGINS_PLAYBACK} ${GSTREAMER_PLUGINS_SYS} ${GSTREAMER_PLUGINS_EFFECTS} ${GSTREAMER_PLUGINS_VIS} ${GSTREAMER_PLUGINS_CAPTURE} ${GSTREAMER_PLUGINS_CODECS_RESTRICTED} ${GSTREAMER_PLUGINS_NET_RESTRICTED} ${GSTREAMER_PLUGINS_GES}
+GSTREAMER_EXTRA_DEPS      := gstreamer-video-1.0 gstreamer-app-1.0
+GSTREAMER_EXTRA_LIBS      := -liconv
+include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer-1.0.mk