UNAME_S := $(shell uname -s)
UNAME_P := $(shell uname -p)
UNAME_M := $(shell uname -m)

#
# Compile flags
#

CFLAGS   = -O3 -std=c11
CXXFLAGS = -O3 -std=c++11

CFLAGS   += -Wall -Wextra -Wno-unused-parameter -Wno-unused-function
CXXFLAGS += -Wall -Wextra -Wno-unused-parameter -Wno-unused-function

# OS specific
# TODO: support Windows
ifeq ($(UNAME_S),Linux)
	CFLAGS += -pthread
endif
ifeq ($(UNAME_S),Darwin)
	CFLAGS += -pthread
endif

# Architecture specific
ifeq ($(UNAME_P),x86_64)
	CFLAGS += -mavx -mavx2 -mfma -mf16c
endif
ifneq ($(filter arm%,$(UNAME_P)),)
	CFLAGS += -mfpu=neon
endif
ifneq ($(filter aarch64%,$(UNAME_M)),)
	CFLAGS += -mfpu=neon
endif
ifneq ($(filter armv%,$(UNAME_M)),)
	# Raspberry Pi 4
	CFLAGS += -mcpu=cortex-a72 -mfloat-abi=hard -mfpu=neon-fp-armv8 -mfp16-format=ieee -mno-unaligned-access
endif

#
# Build library + main
#

main: main.cpp ggml.o whisper.o
	$(CXX) $(CXXFLAGS) main.cpp whisper.o ggml.o -o main
	./main -h

ggml.o: ggml.c ggml.h
	$(CC)  $(CFLAGS)   -c ggml.c

whisper.o: whisper.cpp whisper.h
	$(CXX) $(CXXFLAGS) -c whisper.cpp

clean:
	rm -f *.o main

#
# Examples
#

CC_SDL=`sdl2-config --cflags --libs`

stream: stream.cpp ggml.o whisper.o
	$(CXX) $(CXXFLAGS) stream.cpp ggml.o whisper.o -o stream $(CC_SDL)

#
# Audio samples
#

# download a few audio samples into folder "./samples":
.PHONY: samples
samples:
	@echo "Downloading samples..."
	@mkdir -p samples
	@wget --quiet --show-progress -O samples/gb0.ogg https://upload.wikimedia.org/wikipedia/commons/2/22/George_W._Bush%27s_weekly_radio_address_%28November_1%2C_2008%29.oga
	@wget --quiet --show-progress -O samples/gb1.ogg https://upload.wikimedia.org/wikipedia/commons/1/1f/George_W_Bush_Columbia_FINAL.ogg
	@wget --quiet --show-progress -O samples/hp0.ogg https://upload.wikimedia.org/wikipedia/en/d/d4/En.henryfphillips.ogg
	@wget --quiet --show-progress -O samples/mm1.wav https://cdn.openai.com/whisper/draft-20220913a/micro-machines.wav
	@echo "Converting to 16-bit WAV ..."
	@ffmpeg -loglevel -0 -y -i samples/gb0.ogg -ar 16000 -ac 1 -c:a pcm_s16le samples/gb0.wav
	@ffmpeg -loglevel -0 -y -i samples/gb1.ogg -ar 16000 -ac 1 -c:a pcm_s16le samples/gb1.wav
	@ffmpeg -loglevel -0 -y -i samples/hp0.ogg -ar 16000 -ac 1 -c:a pcm_s16le samples/hp0.wav
	@ffmpeg -loglevel -0 -y -i samples/mm1.wav -ar 16000 -ac 1 -c:a pcm_s16le samples/mm0.wav
	@rm samples/mm1.wav

#
# Models
#

# if not already downloaded, the following targets download the specified model and
# runs it on all samples in the folder "./samples":

.PHONY: tiny.en
.PHONY: tiny
.PHONY: base.en
.PHONY: base
.PHONY: small.en
.PHONY: small
.PHONY: medium.en
.PHONY: medium
.PHONY: large

tiny.en tiny base.en base small.en small medium.en medium large: main
	bash ./download-ggml-model.sh $@
	@echo ""
	@echo "==============================================="
	@echo "Running $@ on all samples in ./samples ..."
	@echo "==============================================="
	@echo ""
	@for f in samples/*.wav; do \
		echo "----------------------------------------------" ; \
		echo "[+] Running base.en on $$f ... (run 'ffplay $$f' to listen)" ; \
	    echo "----------------------------------------------" ; \
		echo "" ; \
		./main -m models/ggml-$@.bin -f $$f ; \
		echo "" ; \
	done