Rename xvmc flags to follow ffmpeg AV_ notion.

preserve MP_ ones until next major bump.

Originally committed as revision 17245 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/xvmc.h

@@ -38,6 +38,13 @@
 //                              1337    IDCT MCo
 #define AV_XVMC_RENDER_MAGIC          0x1DC711C0
 
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#define MP_XVMC_STATE_DISPLAY_PENDING AV_XVMC_STATE_DISPLAY_PENDING
+#define MP_XVMC_STATE_PREDICTION      AV_XVMC_STATE_PREDICTION
+#define MP_XVMC_STATE_OSD_SOURCE      AV_XVMC_STATE_OSD_SOURCE
+#define MP_XVMC_RENDER_MAGIC          AV_XVMC_RENDER_MAGIC
+#endif
+
 struct xvmc_render_state {
     //these are not changed by the decoder!
     int  magic; ///< used as check for memory corruption by regular pixel routines