contrib: add libmpeg2

contrib/src/libmpeg2/SHA512SUMS

+3648a2b3d7e2056d5adb328acd2fb983a1fa9a05ccb6f9388cc686c819445421811f42e8439418a0491a13080977f074a0d8bf8fa6bc101ff245ddea65a46fbc  libmpeg2-0.5.1.tar.gz

contrib/src/libmpeg2/libmpeg2-arm-pld.patch

+diff -urNp libmpeg2.orig/libmpeg2/motion_comp_arm_s.S libmpeg2/libmpeg2/motion_comp_arm_s.S
+--- libmpeg2.orig/libmpeg2/motion_comp_arm_s.S	2008-07-09 21:16:05.000000000 +0200
++++ libmpeg2/libmpeg2/motion_comp_arm_s.S	2009-11-20 19:55:22.000000000 +0100
+@@ -19,6 +19,16 @@
+ @ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+ 
++@ Data preload is supported only by ARM V5TE and above
++
++#if (defined (__ARM_ARCH_2__) || defined (__ARM_ARCH_3__) \
++     || defined (__ARM_ARCH_3M__) || defined (__ARM_ARCH_4__) \
++     || defined (__ARM_ARCH_4T__) || defined (__ARM_ARCH_5__) \
++     || defined (__ARM_ARCH_5T__))
++.macro pld reg
++.endm
++#endif
++
+ 	.text
+ 
+ @ ----------------------------------------------------------------

contrib/src/libmpeg2/rules.mak

+# libmpeg2
+
+LIBMPEG2_VERSION = 0.5.1
+LIBMPEG2_URL := http://libmpeg2.sourceforge.net/files/libmpeg2-$(LIBMPEG2_VERSION).tar.gz
+
+PKGS += libmpeg2
+ifeq ($(call need_pkg,"libmpeg2"),)
+PKGS_FOUND += libmpeg2
+endif
+
+$(TARBALLS)/libmpeg2-$(LIBMPEG2_VERSION).tar.gz:
+	$(call download,$(LIBMPEG2_URL))
+
+.sum-libmpeg2: libmpeg2-$(LIBMPEG2_VERSION).tar.gz
+
+libmpeg2: libmpeg2-$(LIBMPEG2_VERSION).tar.gz .sum-libmpeg2
+	$(UNPACK)
+	$(MOVE)
+
+.libmpeg2: libmpeg2
+	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --without-x --disable-sdl
+	cd $</libmpeg2 && make && make install
+	cd $</include && make && make install
+	touch $@