first contribs with mpg123 module

This contribs is just an example how to create a new output module. It's
not stable.

output_mpg123.c is the real module
sound_alsa and sound_module manages the sound playback with alsa (a
version with tinyalsa may be contributed too in the future)
webclient allows to send GET request to the server and to receive the
audio file data.

Makefile.am

@@ -1,3 +1,3 @@
-SUBDIRS = src data
+SUBDIRS = src data contribs
 
 EXTRA_DIST = autogen.sh

configure.ac

@@ -111,6 +111,27 @@ if test x$HAVE_LIBUPNP = xyes; then
 fi
 AC_SUBST(HAVE_LIBUPNP)
 
+PKG_CHECK_MODULES(ALSA, alsa, HAVE_ALSA=yes, HAVE_ALSA=no)
+if test x$HAVE_ALSA = xyes; then
+  AC_DEFINE(HAVE_ALSA, , [Use Alsa])
+fi
+AC_SUBST(HAVE_ALSA)
+AM_CONDITIONAL(HAVE_ALSA, test x$HAVE_ALSA = xyes)
+
+AC_ARG_WITH( mpg123,
+  AC_HELP_STRING([--without-mpg123],[compile without MPG123 support]),
+  try_mpg123=$withval, try_mpg123=yes )
+HAVE_MPG123=no
+if test x$try_gstreamer = xyes; then
+  dnl check for GStreamer
+  PKG_CHECK_MODULES(MPG123, libmpg123, HAVE_MPG123=yes, HAVE_MPG123=no)
+fi
+if test x$HAVE_MPG123 = xyes; then
+  AC_DEFINE(HAVE_MPG123, , [Use mpg123])
+fi
+AC_SUBST(HAVE_MPG123)
+AM_CONDITIONAL(HAVE_MPG123, test x$HAVE_MPG123 = xyes)
+
 # Checks for header files.
 AC_HEADER_STDC
 
@@ -123,6 +144,7 @@ fi
 
 AC_CONFIG_FILES([Makefile
                  src/Makefile
+                 contribs/Makefile
 		 data/Makefile])
 AC_OUTPUT
 

contribs/Makefile.am

@@ -0,0 +1,22 @@
+if HAVE_MPG123
+pkglib_LTLIBRARIES = gmrender_mpg123.la
+endif
+
+gmrender_mpg123_la_SOURCES = \
+	sound_module.c sound_module.h \
+	sound_alsa.c \
+	webclient.c \
+	output_mpg123.c
+
+GMRENDER_MPG123_VERSION=0.0.1
+
+MOD_MAJOR_VERSION=$(word 1,$(subst ., ,$(GMRENDER_MPG123_VERSION)))
+MOD_MINOR_VERSION=$(word 2,$(subst ., ,$(GMRENDER_MPG123_VERSION)))
+MOD_MICRO_VERSION=$(word 3,$(subst ., ,$(GMRENDER_MPG123_VERSION)))
+
+gmrender_mpg123_la_CFLAGS = $(GLIB_CFLAGS) $(ALSA_CFLAGS) -I ../src
+gmrender_mpg123_la_CFLAGS += -DMOD_MAJOR_VERSION=$(MOD_MAJOR_VERSION)
+gmrender_mpg123_la_CFLAGS += -DMOD_MINOR_VERSION=$(MOD_MINOR_VERSION)
+gmrender_mpg123_la_CFLAGS += -DMOD_MICRO_VERSION=$(MOD_MICRO_VERSION)
+gmrender_mpg123_la_LIBADD = $(GLIB_LIBS) $(ALSA_LIBS) -lmpg123
+gmrender_mpg123_la_LDFLAGS = -module -release $(GMRENDER_MPG123_VERSION)