Integrate OSS4 local audio output

configure.in

@@ -61,6 +61,40 @@ AM_CONDITIONAL(COND_FLAC, test x$use_flac = xtrue)
 AM_CONDITIONAL(COND_MUSEPACK, test x$use_musepack = xtrue)
 AM_CONDITIONAL(COND_ITUNES, test x$use_itunes = xtrue)
 
+AC_ARG_WITH(oss4, AC_HELP_STRING([--with-oss4=includedir], [Use OSS4 with soundcard.h in includedir (default /usr/lib/oss/include/sys)]),
+  [ case "$withval" in
+    no)
+    case "$host" in
+      *-*-linux-*)
+      use_oss4=false
+      ;;
+      *-*-kfreebsd*-*|*-*-freebsd-*)
+      AC_MSG_ERROR([OSS4 must be enabled on FreeBSD systems])
+      ;;
+    esac
+    ;;
+    yes)
+    use_oss4=true
+    oss4_includedir=/usr/lib/oss/include/sys
+    ;;
+    [[\\/$]]* | ?:[[\\/]]* )
+    use_oss4=true
+    oss4_includedir="$withval"
+    ;;
+    *)
+    AC_MSG_ERROR([expected an absolute directory name for --with-oss4: $withval])
+    ;;
+    esac ],
+  [ case "$host" in
+    *-*-linux-*)
+    use_oss4=false
+    ;;
+    *-*-kfreebsd*-*|*-*-freebsd-*)
+    use_oss4=true
+    oss4_includedir=/usr/lib/oss/include/sys
+    ;;
+    esac ])
+
 dnl Checks for libraries.
 PKG_CHECK_MODULES(CONFUSE, [ libconfuse ])
 PKG_CHECK_MODULES(AVAHI, [ avahi-client >= 0.6.24 ])
@@ -121,16 +155,31 @@ if test x$use_itunes = xtrue; then
 fi
 
 case "$host" in
-  *linux*)
+  *-*-linux-*)
+    if test x$use_oss4 != xtrue; then
         use_alsa=true
 	PKG_CHECK_MODULES(ALSA, [ alsa ])
 	AC_DEFINE(LAUDIO_USE_ALSA, 1, [define if local audio output uses ALSA])
+    fi
 
     AC_CHECK_HEADER(sys/signalfd.h, , AC_MSG_ERROR([signalfd required; glibc 2.9+ recommended]))
     ;;
 esac
 
+if test x$use_oss4 = xtrue; then
+   OSS4CPPFLAGS="-I$oss4_includedir"
+
+   save_CPPFLAGS="$CPPFLAGS"
+   CPPFLAGS="$OSS4CPPFLAGS"
+
+   AC_CHECK_HEADER(soundcard.h, , AC_MSG_ERROR([soundcard.h not found in $oss4_includedir]))
+
+   CPPFLAGS="$save_CPPFLAGS"
+fi
+
 AM_CONDITIONAL(COND_ALSA, test x$use_alsa = xtrue)
+AM_CONDITIONAL(COND_OSS4, test x$use_oss4 = xtrue)
+AC_SUBST(OSS4CPPFLAGS)
 
 AC_CHECK_SIZEOF(void *)
 

src/Makefile.am

@@ -17,6 +17,10 @@ if COND_ALSA
 ALSASRC=laudio_alsa.c
 endif
 
+if COND_OSS4
+OSS4SRC=laudio_oss4.c
+endif
+
 ANTLR_GRAMMARS = \
 	RSP.g RSP2SQL.g \
 	DAAP.g DAAP2SQL.g
@@ -29,7 +33,7 @@ ANTLR_SOURCES = \
 
 ANTLR_PRODUCTS =
 
-forked_daapd_CPPFLAGS = -D_GNU_SOURCE @AVAHI_CFLAGS@ @SQLITE3_CFLAGS@ @FFMPEG_CFLAGS@ @CONFUSE_CFLAGS@ @TAGLIB_CFLAGS@ @MINIXML_CFLAGS@ @LIBPLIST_CFLAGS@ @LIBGCRYPT_CFLAGS@ @ALSA_CFLAGS@ \
+forked_daapd_CPPFLAGS = -D_GNU_SOURCE @AVAHI_CFLAGS@ @SQLITE3_CFLAGS@ @FFMPEG_CFLAGS@ @CONFUSE_CFLAGS@ @TAGLIB_CFLAGS@ @MINIXML_CFLAGS@ @LIBPLIST_CFLAGS@ @LIBGCRYPT_CFLAGS@ @ALSA_CFLAGS@ @OSS4CPPFLAGS@ \
 	-DDATADIR="\"$(pkgdatadir)\"" -DCONFDIR="\"$(sysconfdir)\"" -DSTATEDIR="\"$(localstatedir)\""
 
 forked_daapd_LDADD = @AVAHI_LIBS@ @SQLITE3_LIBS@ @FFMPEG_LIBS@ @CONFUSE_LIBS@ @FLAC_LIBS@ @TAGLIB_LIBS@ @LIBEVENT_LIBS@ @LIBAVL_LIBS@ @MINIXML_LIBS@ @ANTLR3C_LIBS@ @LIBPLIST_LIBS@ @LIBGCRYPT_LIBS@ @ALSA_LIBS@
@@ -56,7 +60,7 @@ forked_daapd_SOURCES = main.c \
 	rsp_query.c rsp_query.h \
 	daap_query.c daap_query.h \
 	player.c player.h \
-	$(ALSASRC) laudio.h \
+	$(ALSASRC) $(OSS4SRC) laudio.h \
 	raop.c raop.h \
 	evrtsp/rtsp.c evrtp/evrtsp.h \
 	evrtsp/rtsp-internal.h evrtsp/log.h \