Add the audio handling changes to build system and documentation

src/Makefile.am

@@ -1,6 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
-SUBDIRS = cpu debug dos fpu gui hardware libs ints misc shell platform 
+SUBDIRS = cpu debug dos fpu gui hardware libs ints misc shell platform
 
 bin_PROGRAMS = dosbox
 
@@ -14,8 +14,6 @@ endif
 dosbox_SOURCES = dosbox.cpp $(ico_stuff)
 dosbox_LDADD = cpu/libcpu.a debug/libdebug.a dos/libdos.a fpu/libfpu.a  hardware/libhardware.a gui/libgui.a \
                ints/libints.a misc/libmisc.a shell/libshell.a hardware/mame/libmame.a \
-               hardware/serialport/libserial.a libs/gui_tk/libgui_tk.a
+               hardware/serialport/libserial.a libs/gui_tk/libgui_tk.a libs/decoders/libdecoders.a
 
 EXTRA_DIST = winres.rc dosbox.ico
-
-

src/libs/Makefile.am

@@ -1,3 +1,4 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
-SUBDIRS = zmbv gui_tk
+SUBDIRS = zmbv gui_tk decoders
+

src/libs/decoders/Makefile.am

@@ -0,0 +1,33 @@
+noinst_LIBRARIES = libdecoders.a
+
+libdecoders_a_SOURCES = \
+	SDL_sound.c          \
+	SDL_sound.h          \
+	SDL_sound_internal.h \
+	audio_convert.c      \
+	wav.c                \
+	dr_wav.h             \
+	flac.c               \
+	dr_flac.h            \
+	opus.c               \
+	vorbis.c             \
+	stb_vorbis.h         \
+	mp3.cpp              \
+	mp3_seek_table.cpp   \
+	mp3_seek_table.h     \
+	dr_mp3.h             \
+	archive.h            \
+	xxhash.c             \
+	xxhash.h
+
+libdecoders_a_CXXFLAGS = \
+	$(AM_CXXFLAGS) \
+	$(CXXFLAGS) \
+	-Wpedantic \
+	-Wall
+
+libdecoders_a_CFLAGS = \
+	$(AM_CFLAGS) \
+	$(CFLAGS) \
+	-Wpedantic \
+	-Wall