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# 1 hour build time
SHELL=/bin/bash
MAX_MEMORY?=300mb 
MAX_THREADS?=2 
EMSDK?=../emsdk 
COMPILE_JOBS?:=$(nproc) 

SRC:=$(realpath src) 
KALDI:=$(realpath kaldi) 
VOSK:=$(realpath vosk-api) 
OPENFST:=$(KALDI)/tools/openfst 
LIBARCHIVE:=$(realpath libarchive) 
ZSTD:=$(realpath zstd) 
CLAPACK_WASM:=$(realpath clapack-wasm) 

browser-recognizer: vosk libarchive
	cd $(SRC) && \
	em++ -O3 global.cc genericModel.cc model.cc spkModel.cc recognizer.cc bindings.cc -sWASMFS -sWASM_BIGINT -sSINGLE_FILE -sMODULARIZE -sTRUSTED_TYPES -sEMBIND_STD_STRING_IS_UTF8 -sPTHREAD_POOL_DELAY_LOAD -sTEXTDECODER=2 -sPTHREAD_POOL_SIZE_STRICT=2 -sINITIAL_MEMORY=$(MAX_MEMORY) -sPTHREAD_POOL_SIZE=$(MAX_THREADS) -sPOLYFILL=0 -sSUPPORT_LONGJMP=0 -sEXPORT_NAME=loadBR -sEXPORTED_RUNTIME_METHODS=UTF8ToString,stringToUTF8OnStack -sMALLOC=emmaloc -sEXPORTED_FUNCTIONS=_malloc,_main -sENVIRONMENT=web -I. -I$(LIBARCHIVE)/include -I$(VOSK)/src -L$(LIBARCHIVE)/lib -larchive -L$(ZSTD)/lib -lzstd -L$(KALDI)/src -l:online2/kaldi-online2.a -l:decoder/kaldi-decoder.a -l:ivector/kaldi-ivector.a -l:gmm/kaldi-gmm.a -l:tree/kaldi-tree.a -l:feat/kaldi-feat.a -l:cudamatrix/kaldi-cudamatrix.a -l:lat/kaldi-lat.a -l:lm/kaldi-lm.a -l:rnnlm/kaldi-rnnlm.a -l:hmm/kaldi-hmm.a -l:nnet3/kaldi-nnet3.a -l:transform/kaldi-transform.a -l:matrix/kaldi-matrix.a -l:fstext/kaldi-fstext.a -l:util/kaldi-util.a -l:base/kaldi-base.a -L$(OPENFST)/lib -l:libfst.a -l:libfstngram.a -L$(CLAPACK_WASM) -l:CBLAS/lib/cblas.a -l:CLAPACK-3.2.1/lapack.a -l:CLAPACK-3.2.1/libcblaswr.a -l:f2c_BLAS-3.8.0/blas.a -l:libf2c/libf2c.a -L$(VOSK)/src -l:vosk.a -lopfs.js -lembind -pthread -flto --pre-js pre.js ../BrowserRecognizer.js && \
	cd .. && \
	rm -f BrowserRecognizer.worker.js && \
	sed -i 's/locateFile("BrowserRecognizer.worker.js")/pthreadUrl/g' BrowserRecognizer.js && \
	sed -i 's/let root/var root/g' BrowserRecognizer.js 

prepare:
	sudo apt install shtool libtool autogen autotools-dev pkg-config make && \
	[ $(EMSDK) != ../emsdk -a ! -d $(EMSDK) ] && \
		echo "Invalid emsdk path"; \
		exit 1; \
	[ $(MAX_THREAD) -lt 2 ] && \
		echo "MAX_THREADS must be greater than or equal to 2"; \
		exit 1; \
	[ $(COMPILE_JOBS) -lt 1 ] && \
		echo "COMPILE_JOBS must be greater than or equal to 1"; \
		exit 1; \
	[[ ! $(MAX_MEMORY) =~ "$(^[0-9]+([kmgt]b)?$$)" ]] && \
		echo "MAX_MEMORY valid suffixes are kb, mb, gb, tb, none (bytes)"; \
		exit 1; \
	[ $(EMSDK) = emsdk ] && \
		echo "Installing emsdk + Emscripten..."; \
		git clone --depth=1 https://github.com/emscripten-core/emsdk.git && \
		cd emsdk && \
		./emsdk install 3.1.53 && \
		./emsdk activate 3.1.53; \
	. $(EMSDK)/emsdk_env.sh && \
	export PATH=:$$PATH:$(EMSDK)/upstream/bin 

zstd: prepare
	rm -rf /tmp/zstd && \
	git clone -b v1.5.5 --depth=1 https://github.com/facebook/zstd /tmp/zstd && \
	cd /tmp/zstd && \
	HAVE_THREAD=0 ZSTD_LEGACY_SUPPORT=0 HAVE_ZLIB=0 HAVE_LZMA=0 HAVE_LZ4=0 ZSTD_NOBENCH=1 ZSTD_NODICT=1 ZSTD_NOCOMPRESS=1 BACKTRACE=0 PREFIX=$(ZSTD) CPPFLAGS="-O3 -flto" LDFLAGS="-O3 -flto" emmake make -j$(COMPILE_JOBS) install && \
	rm -rf /tmp/zstd 

libarchive: zstd 
	rm -rf /tmp/libarchive && \
	git clone -b v3.7.2 --depth=1 https://github.com/libarchive/libarchive /tmp/libarchive && \
	cd /tmp/libarchive && \
	build/autogen.sh && \
	CPPFLAGS="-I$(ZSTD)/include -flto" LDFLAGS="-L$(ZSTD)/lib -flto" emconfigure ./configure --prefix=$(LIBARCHIVE) --without-lz4 --without-lzma --without-zlib --without-bz2lib --without-xml2 --without-expat --without-cng --without-openssl --without-libb2 --disable-bsdunzip --disable-xattr --disable-acl --disable-bsdcpio --disable-bsdcat --disable-rpath --disable-maintainer-mode --disable-dependency-tracking --enable-static --disable-shared && \
	emmake make -j$(COMPILE_JOBS) install && \
	rm -rf /tmp/libarchive 

clapack-wasm: prepare
	git clone --depth=1 https://gitlab.inria.fr/multispeech/kaldi.web/clapack-wasm.git $(CLAPACK_WASM) && \
	cd $(CLAPACK_WASM) && \
	bash ./install_repo.sh emcc 

openfst: prepare
	rm -rf /tmp/openfst && \
	git clone --depth=1 https://github.com/alphacep/openfst /tmp/openfst && \
	cd /tmp/openfst && \
	autoreconf -i && \
	CXXFLAGS="-pthread -r -O3 -flto" LDFLAGS="-O3 -pthread -flto" emconfigure ./configure --prefix=$(OPENFST) --enable-static --disable-shared --enable-ngram-fsts --enable-lookahead-fsts --disable-bin --with-pic && \
	emmake make -j$(COMPILE_JOBS) install && \
	echo "PACKAGE_VERSION = 1.8.0" >> $(OPENFST)/Makefile && \
	rm -rf /tmp/openfst 
	
kaldi: openfst clapack-wasm
	git clone -b vosk --depth=1 https://github.com/alphacep/kaldi $(KALDI) && \
	cd $(KALDI)/src && \
	git apply $(SRC)/kaldi.patch && \
	CXXFLAGS="-O3 -msimd128 -UHAVE_EXECINFO_H -pthread -flto" LDFLAGS="-O3 -sERROR_ON_UNDEFINED_SYMBOLS=0 -lembind -pthread -flto" emconfigure ./configure --use-cuda=no --with-cudadecoder=no --static --static-math=yes --static-fst=yes --debug-level=0 --double-precision=yes --clapack-root=$(CLAPACK_WASM) --host=WASM && \
	emmake make -j$(COMPILE_JOBS) online2 lm rnnlm

vosk: kaldi
	git clone -b go/v0.3.46 --depth=1 https://github.com/alphacep/vosk-api $(VOSK) && \
	cd $(VOSK)/src && \
	git apply $(SRC)/vosk.patch && \
	VOSK_FILES="recognizer.cc language_model.cc model.cc spk_model.cc vosk_api.cc" && \
	em++ -pthread -O3 -flto -Wno-deprecated -I. -I$(KALDI)/src -I$(OPENFST)/include $(VOSK_FILES) -c && \
	emar -rcs vosk.a $(VOSK_FILES:.cc=.o)
	
.PHONY: prepare