src/xvba_buffer.c: enable H.264 Level 5.1 support

Enable H.264 Level 5.1 in xvba-video VA API plugin. To enable
this a change must be made in ATI configuration database.

Important notice:
=================
It is require to enable H.264 Level 5.1 in the fglrx driver
(for the moment AMD Catalyst 12.6):

  aticonfig --set-pcs-u32=MCIL,HWUVD_H264Level51Support,1

src/xvba_buffer.c

@@ -371,23 +371,18 @@ translate_VAPictureParameterBufferH264(
         obj_context->picture_height
     );
 
-    /* Check for H.264 content over HP@L4.1 */
+    /* Check for wrongly coded H264 Level 41
+       adjust profile to Level 51 when reframes are too many
+    */
     unsigned int num_ref_frames = pic_param->num_ref_frames;
-    if (profile == XVBA_H264_HIGH && level > 41) {
-        if (!driver_data->warn_h264_over_hp_l41) {
-            driver_data->warn_h264_over_hp_l41 = 1;
-            xvba_information_message(
-                "driver does not support H.264 content over HP@L4.1. "
-                "Please upgrade.\n"
-            );
-        }
+    if (profile == XVBA_H264_HIGH && level == 41) {
 
-        /* Use fail-safe values (lower ref frames) */
+        /* Increase Level to decode pseudo Level 41 as Level 51 */
         const unsigned int mbw = pic_param->picture_width_in_mbs_minus1 + 1;
         const unsigned int mbh = (obj_context->picture_height + 15) / 16;
         const unsigned int max_ref_frames = 12288 * 1024 / (mbw * mbh * 384);
         if (max_ref_frames < num_ref_frames)
-            num_ref_frames = max_ref_frames;
+            level = 51;
     }
 
     XVBABufferDescriptor * const xvba_buffer = obj_surface->pic_desc_buffer;