CONFIGURE: Add detection of liba52

This is for an experiment aiming to decode audio for the hi-res
videos in Zork: Grand Inquisitor. I don't know if we want to add
a dependency on liba52, but the license should allow us to include
the code verbatim, if that's preferrable.

1 files changed, 52 insertions, 1 deletions

diff --git a/configure b/configure
index f590fe6c68..0fbc5a1b19 100755
--- a/configure
+++ b/configure
@@ -149,6 +149,7 @@ _sndio=auto
 _timidity=auto
 _zlib=auto
 _mpeg2=auto
+_a52=auto
 _sparkle=auto
 _osxdockplugin=auto
 _jpeg=auto
@@ -1046,7 +1047,10 @@ Optional Libraries:
   --with-mpeg2-prefix=DIR  prefix where libmpeg2 is installed (optional)
   --enable-mpeg2           enable mpeg2 codec for cutscenes [autodetect]
 
-  --with-jpeg-prefix=DIR   prefix where libjpeg is installed (optional)
+  --with-a52-prefix=DIR    Prefix where liba52 is installed (optional)
+  --enable-a52             enable a52 codec for MPEG decoder [autodetect]
+
+  --with-jpeg-prefix=DIR   Prefix where libjpeg is installed (optional)
   --disable-jpeg           disable JPEG decoder [autodetect]
 
   --with-png-prefix=DIR    prefix where libpng is installed (optional)
@@ -1176,6 +1180,8 @@ for ac_option in $@; do
 	--disable-nasm)           _nasm=no        ;;
 	--enable-mpeg2)           _mpeg2=yes      ;;
 	--disable-mpeg2)          _mpeg2=no       ;;
+	--enable-a52)             _a52=yes        ;;
+	--disable-a52)            _a52=no         ;;
 	--disable-jpeg)           _jpeg=no        ;;
 	--enable-jpeg)            _jpeg=yes       ;;
 	--disable-png)            _png=no         ;;
@@ -1233,6 +1239,11 @@ for ac_option in $@; do
 		MPEG2_CFLAGS="-I$arg/include"
 		MPEG2_LIBS="-L$arg/lib"
 		;;
+	--with-a52-prefix=*)
+		arg=`echo $ac_option | cut -d '=' -f 2`
+		A52_CFLAGS="-I$arg/include"
+		A52_LIBS="-L$arg/lib"
+		;;
 	--with-alsa-prefix=*)
 		arg=`echo $ac_option | cut -d '=' -f 2`
 		ALSA_CFLAGS="-I$arg/include"
@@ -4428,6 +4439,46 @@ define_in_config_if_yes "$_mpeg2" 'USE_MPEG2'
 echo "$_mpeg2"
 
 #
+# Check for liba52
+#
+echocheck "liba52"
+if test "$_a52" = auto ; then
+	_a52=no
+	cat > $TMPC << EOF
+typedef signed $type_1_byte int8_t;
+typedef signed $type_2_byte int16_t;
+typedef signed $type_4_byte int32_t;
+
+typedef unsigned $type_1_byte uint8_t;
+typedef unsigned $type_2_byte uint16_t;
+typedef unsigned $type_4_byte uint32_t;
+
+extern "C" {
+#include <a52dec/a52.h>
+}
+
+int main(void) {
+	a52_init(0);
+	return 0;
+}
+EOF
+
+	if test -n "$_host"; then
+		# don't execute while cross compiling
+		cc_check $A52_CFLAGS $A52_LIBS -la52 && _a52=yes
+	else
+		cc_check_no_clean $A52_CFLAGS $A52_LIBS -la52 && $TMPO$HOSTEXEEXT && _a52=yes
+		cc_check_clean
+	fi
+fi
+if test "$_a52" = yes ; then
+	INCLUDES="$INCLUDES $A52_FLAGS"
+	LIBS="$LIBS $A52_LIBS -la52"
+fi
+define_in_config_if_yes "$_a52" 'USE_A52'
+echo "$_a52"
+
+#
 # Check for Sparkle if updates support is enabled
 #
 case $_host_os in