New version 0.2.0 with lot of fixes

* Introduce a new library functions aptx_decode_sync() and
  aptx_decode_sync_finish() for synchronization and decoding
  partially corrupted continuous stream

* Improve synchronization support in openaptxdec utility via
  these new library functions

* Fix openaptxdec utility to not output data which are result of
  decoding the trailing aptx padding from the last aptX sample

* Fix exit codes from utilities, returns 1 when error occurred

* Make utilities to be compatible with Windows systems, set
  stdin and stdout to binary mode

* Make source code to be compatible with ISO C90, C99, C11, C17,
  ISO C++ 1998, 2011, 2014, 2017, 2020 and also with MSVC 6.0
  (and new), but there is one exception that stdint.h header file
  with basic fixed width integer types needs to be provided

* Fix integer variable types, size, signedness and const qualifiers

* Make Makefile to be POSIX compatible

* Do not install static executables

* Generate and install a new pkg-config file for library

* Provide and install static library libopenaptx.a

* Enable -O3 optimizations in Makefile by default

* Update parameters for sox/play examples in README and help

Makefile

@@ -1,47 +1,93 @@
-MAJOR := 0
-MINOR := 1
-PATCH := 0
+.POSIX:
+.SUFFIXES:
+.PHONY: all clean install uninstall
 
-PREFIX := /usr/local
-BINDIR := bin
-LIBDIR := lib
-INCDIR := include
+RM = rm -f
+CP = cp -a
+LNS = ln -sf
+MKDIR = mkdir -p
+PRINTF = printf
 
-LIBNAME := libopenaptx.so
-SONAME := $(LIBNAME).$(MAJOR)
-FILENAME := $(SONAME).$(MINOR).$(PATCH)
+CFLAGS = -W -Wall -O3
+LDFLAGS = -s
+ARFLAGS = -rcs
 
-UTILITIES := openaptxenc openaptxdec openaptxenc-static openaptxdec-static
+PREFIX = /usr/local
+BINDIR = bin
+LIBDIR = lib
+INCDIR = include
+PKGDIR = $(LIBDIR)/pkgconfig
 
-HEADERS := openaptx.h
-SOURCES := openaptx.c
+NAME = openaptx
+MAJOR = 0
+MINOR = 2
+PATCH = 0
 
-BUILD := $(FILENAME) $(SONAME) $(LIBNAME) $(UTILITIES)
+LIBNAME = lib$(NAME).so
+SONAME = $(LIBNAME).$(MAJOR)
+SOFILENAME = $(SONAME).$(MINOR).$(PATCH)
+ANAME = lib$(NAME).a
+PCNAME = lib$(NAME).pc
+
+UTILITIES = $(NAME)enc $(NAME)dec
+STATIC_UTILITIES = $(NAME)enc.static $(NAME)dec.static
+
+HEADERS = $(NAME).h
+SOURCES = $(NAME).c
+AOBJECTS = $(NAME).o
+IOBJECTS = $(NAME)enc.o $(NAME)dec.o
+
+BUILD = $(SOFILENAME) $(SONAME) $(LIBNAME) $(ANAME) $(AOBJECTS) $(IOBJECTS) $(UTILITIES) $(STATIC_UTILITIES)
 
 all: $(BUILD)
 
+clean:
+	$(RM) $(BUILD)
+
 install: $(BUILD)
-	mkdir -p $(DESTDIR)/$(PREFIX)/$(LIBDIR)
-	cp -a $(FILENAME) $(SONAME) $(LIBNAME) $(DESTDIR)/$(PREFIX)/$(LIBDIR)
-	mkdir -p $(DESTDIR)/$(PREFIX)/$(BINDIR)
-	cp -a $(UTILITIES) $(DESTDIR)/$(PREFIX)/$(BINDIR)
-	mkdir -p $(DESTDIR)/$(PREFIX)/$(INCDIR)
-	cp -a $(HEADERS) $(DESTDIR)/$(PREFIX)/$(INCDIR)
-
-$(FILENAME): $(SOURCES) $(HEADERS)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -I. -shared -fPIC -Wl,-soname,$(SONAME) -o $@ $(SOURCES)
+	$(MKDIR) $(DESTDIR)$(PREFIX)/$(LIBDIR)
+	$(CP) $(SOFILENAME) $(SONAME) $(LIBNAME) $(ANAME) $(DESTDIR)$(PREFIX)/$(LIBDIR)
+	$(MKDIR) $(DESTDIR)$(PREFIX)/$(BINDIR)
+	$(CP) $(UTILITIES) $(DESTDIR)$(PREFIX)/$(BINDIR)
+	$(MKDIR) $(DESTDIR)$(PREFIX)/$(INCDIR)
+	$(CP) $(HEADERS) $(DESTDIR)$(PREFIX)/$(INCDIR)
+	$(MKDIR) $(DESTDIR)$(PREFIX)/$(PKGDIR)
+	$(PRINTF) 'prefix=%s\nexec_prefix=$${prefix}\nlibdir=$${exec_prefix}/%s\nincludedir=$${prefix}/%s\n\n' $(PREFIX) $(LIBDIR) $(INCDIR) > $(DESTDIR)$(PREFIX)/$(PKGDIR)/$(PCNAME)
+	$(PRINTF) 'Name: lib%s\nDescription: Open Source aptX codec library\nVersion: %u.%u.%u\n' $(NAME) $(MAJOR) $(MINOR) $(PATCH) >> $(DESTDIR)$(PREFIX)/$(PKGDIR)/$(PCNAME)
+	$(PRINTF) 'Libs: -Wl,-rpath=$${libdir} -L$${libdir} -l%s\nCflags: -I$${includedir}\n' $(NAME) >> $(DESTDIR)$(PREFIX)/$(PKGDIR)/$(PCNAME)
+
+uninstall:
+	for f in $(SOFILENAME) $(SONAME) $(LIBNAME) $(ANAME); do $(RM) $(DESTDIR)$(PREFIX)/$(LIBDIR)/$$f; done
+	for f in $(UTILITIES); do $(RM) $(DESTDIR)$(PREFIX)/$(BINDIR)/$$f; done
+	for f in $(HEADERS); do $(RM) $(DESTDIR)$(PREFIX)/$(INCDIR)/$$f; done
+	$(RM) $(DESTDIR)$(PREFIX)/$(PKGDIR)/$(PCNAME)
+
+$(UTILITIES): $(LIBNAME)
 
-$(SONAME): $(FILENAME)
-	ln -sf $< $@
+$(STATIC_UTILITIES): $(ANAME)
+
+$(AOBJECTS) $(IOBJECTS): $(HEADERS)
 
 $(LIBNAME): $(SONAME)
-	ln -sf $< $@
+	$(LNS) $(SONAME) $@
 
-%-static: %.c $(SOURCES) $(HEADERS)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -I. -o $@ $< $(SOURCES)
+$(SONAME): $(SOFILENAME)
+	$(LNS) $(SOFILENAME) $@
 
-%: %.c $(LIBNAME) $(HEADERS)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -I. -o $@ $< $(LIBNAME)
+$(SOFILENAME): $(SOURCES) $(HEADERS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -I. -shared -fPIC -Wl,-soname,$(SONAME) -o $@ $(SOURCES)
 
-clean:
-	$(RM) $(BUILD)
+$(ANAME): $(AOBJECTS)
+	$(RM) $@
+	$(AR) $(ARFLAGS) $@ $(AOBJECTS)
+
+.SUFFIXES: .o .c .static
+
+.o:
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBNAME)
+
+.o.static:
+	$(CC) $(CFLAGS) $(LDFLAGS) -static -o $@ $< $(ANAME)
+
+.c.o:
+	$(CC) $(CFLAGS) $(CPPFLAGS) -I. -c -o $@ $<

README

@@ -4,27 +4,35 @@ mainly used in Bluetooth A2DP profile.
 
 It provides dynamic linked shared library libopenaptx.so and simple command line
 utilities openaptxenc and openaptxdec for encoding and decoding operations.
+Documentation for shared library is provided in C header file openaptx.h.
+
 There is support for aptX and aptX HD codec variants. Both variants operates on
 a raw 24 bit signed stereo audio samples. aptX provides fixed compress ratio 6:1
 and aptX HD fixed compress ratio 4:1.
 
 For building and installing into system simply run: make install. For building
-without installing run: LD_RUN_PATH='$ORIGIN' make
+without installing run: LD_RUN_PATH='$ORIGIN' make. For producing windows builds
+run: make SOFILENAME=openaptx0.dll.
+
+It is suggested to compile library with -O3 optimizations (enabled by default
+when env variable CFLAGS is not set) and -mavx2 switch (not enabled by default,
+needs CPU with AVX2: Intel Haswell or AMD Excavator) as it provides significant
+boost to the performance.
 
 Usage of command line utilities together with sox for resampling or playing:
 
 To convert Wave audio file sample.wav into aptX audio file sample.aptx run:
 
-$ sox sample.wav -t raw -r 44.1k -s -3 -c 2 - | openaptxenc > sample.aptx
+$ sox sample.wav -t raw -r 44.1k -L -e s -b 24 -c 2 - | openaptxenc > sample.aptx
 
 To convert aptX audio file sample.aptx into Wave audio file sample.wav run:
 
-$ openaptxdec < sample.aptx | sox -t raw -r 44.1k -s -3 -c 2 - sample.wav
+$ openaptxdec < sample.aptx | sox -t raw -r 44.1k -L -e s -b 24 -c 2 - sample.wav
 
 To convert MP3 audio file sample.mp3 into aptX HD audio file sample.aptxhd run:
 
-$ sox sample.mp3 -t raw -r 44.1k -s -3 -c 2 - | openaptxenc --hd > sample.aptxhd
+$ sox sample.mp3 -t raw -r 44.1k -L -e s -b 24 -c 2 - | openaptxenc --hd > sample.aptxhd
 
 To play aptX HD audio file sample.aptxhd run:
 
-$ openaptxdec --hd < sample.aptxhd | play -t raw -r 44.1k -s -3 -c 2 -
+$ openaptxdec --hd < sample.aptxhd | play -t raw -r 44.1k -L -e s -b 24 -c 2 -