DISC_LABEL := ADJUSTMENTS
DURATION ?= 24

BDJSDK_HOME := $(CURDIR)/vendor/bdj-sdk
JAVA8_HOME ?= $(BDJSDK_HOME)/host/jdk8
JAVAC := $(JAVA8_HOME)/bin/javac
JAR := $(JAVA8_HOME)/bin/jar
BDSIGNER := $(BDJSDK_HOME)/host/bin/bdsigner
MAKEFS := $(BDJSDK_HOME)/host/bin/makefs
TSMUXER := $(CURDIR)/tools/tsmuxer/tsMuxeR

BUILD_DIR := build
ASSET_DIR := assets/generated
MUX_DIR := $(BUILD_DIR)/muxed-bd
DISC_DIR := $(BUILD_DIR)/disc
CLASSES_DIR := $(BUILD_DIR)/classes

VIDEO_ES := $(ASSET_DIR)/feature.m2v
AUDIO_ES := $(ASSET_DIR)/feature.ac3
META_FILE := $(BUILD_DIR)/feature.meta
ISO_FILE := $(BUILD_DIR)/adjustments.iso
JAR_FILE := $(DISC_DIR)/BDMV/JAR/00000.jar

SOURCES := $(shell find src -name '*.java' -type f 2>/dev/null)
PERMISSIONS := $(shell find src -name '*.perm' -type f 2>/dev/null)
STUBS := $(BDJSDK_HOME)/target/lib/enhanced-stubs.zip:$(BDJSDK_HOME)/target/lib/sony-stubs.jar

export JAVA8_HOME

.PHONY: all bootstrap assets mux disc iso inspect run open clean distclean

all: $(ISO_FILE)

bootstrap:
	scripts/bootstrap-tools.sh

assets: $(VIDEO_ES) $(AUDIO_ES)

mux: $(MUX_DIR)/BDMV/STREAM/00000.m2ts

disc: $(JAR_FILE)

iso: $(ISO_FILE)

$(VIDEO_ES):
	mkdir -p $(ASSET_DIR)
	ffmpeg -hide_banner -y \
		-f lavfi -i "smptebars=size=1280x720:rate=24000/1001" \
		-t $(DURATION) \
		-c:v mpeg2video -pix_fmt yuv420p -g 12 -bf 2 \
		-b:v 8000k -maxrate 15000k -bufsize 9781248 \
		-f mpeg2video $@

$(AUDIO_ES):
	mkdir -p $(ASSET_DIR)
	ffmpeg -hide_banner -y \
		-f lavfi -i "sine=frequency=73:sample_rate=48000" \
		-t $(DURATION) \
		-c:a ac3 -b:a 192k $@

$(META_FILE): $(VIDEO_ES) $(AUDIO_ES)
	mkdir -p $(BUILD_DIR)
	printf '%s\n' \
		'MUXOPT --blu-ray --label="$(DISC_LABEL)"' \
		'V_MPEG-2, $(CURDIR)/$(VIDEO_ES), fps=23.976, ar=16:9, lang=eng' \
		'A_AC3, $(CURDIR)/$(AUDIO_ES), lang=eng' \
		> $@

$(MUX_DIR)/BDMV/STREAM/00000.m2ts: $(META_FILE) $(TSMUXER)
	rm -rf $(MUX_DIR)
	mkdir -p $(MUX_DIR)
	$(TSMUXER) $(META_FILE) $(MUX_DIR)

$(JAR_FILE): $(SOURCES) $(PERMISSIONS) $(MUX_DIR)/BDMV/STREAM/00000.m2ts
	rm -rf $(DISC_DIR) $(CLASSES_DIR)
	mkdir -p $(DISC_DIR) $(CLASSES_DIR) $(DISC_DIR)/BDMV/JAR
	cp -a $(BDJSDK_HOME)/resources/AVCHD/. $(DISC_DIR)/
	mkdir -p $(DISC_DIR)/BDMV/BACKUP/CLIPINF $(DISC_DIR)/BDMV/BACKUP/PLAYLIST
	cp -a $(MUX_DIR)/BDMV/STREAM/00000.m2ts $(DISC_DIR)/BDMV/STREAM/00000.m2ts
	cp -a $(MUX_DIR)/BDMV/CLIPINF/00000.clpi $(DISC_DIR)/BDMV/CLIPINF/00000.clpi
	cp -a $(MUX_DIR)/BDMV/PLAYLIST/00000.mpls $(DISC_DIR)/BDMV/PLAYLIST/00000.mpls
	cp -a $(MUX_DIR)/BDMV/CLIPINF/00000.clpi $(DISC_DIR)/BDMV/BACKUP/CLIPINF/00000.clpi
	cp -a $(MUX_DIR)/BDMV/PLAYLIST/00000.mpls $(DISC_DIR)/BDMV/BACKUP/PLAYLIST/00000.mpls
	$(JAVAC) -Xlint:-options -source 1.3 -target 1.3 -cp $(STUBS) -d $(CLASSES_DIR) $(SOURCES)
	mkdir -p $(CLASSES_DIR)/org/homebrew
	cp $(PERMISSIONS) $(CLASSES_DIR)/org/homebrew/
	$(JAR) cf $@ -C $(CLASSES_DIR) .
	$(BDSIGNER) -keystore $(BDJSDK_HOME)/resources/sig.ks $@
	rm -rf META-INF

$(ISO_FILE): $(JAR_FILE) $(MAKEFS)
	mkdir -p $(BUILD_DIR)
	$(MAKEFS) -m 64m -t udf -o T=bdre,v=2.50,L=$(DISC_LABEL) $@ $(DISC_DIR)

$(TSMUXER):
	scripts/bootstrap-tools.sh

$(MAKEFS):
	scripts/bootstrap-tools.sh

inspect: $(ISO_FILE)
	bd_info $(ISO_FILE)
	bd_list_titles $(ISO_FILE) -a

# Preview the menu straight from the BDMV folder. libbluray loads the BD-J Xlet
# from a folder but not from a UDF .iso on this setup (see scripts/run-vlc.sh),
# so `run` intentionally does not depend on the ISO.
run: bootstrap $(JAR_FILE)
	scripts/run-vlc.sh $(DISC_DIR)

open: run

clean:
	rm -rf $(BUILD_DIR) $(ASSET_DIR)
	find src -name '*.class' -delete
	rm -rf META-INF

distclean: clean
	rm -rf tools/tsmuxer tools/downloads