Changed defaults & range checking for AltRef params

Modified the range checking of parameters used in the
AltRef temporal filter (arnr-max-frames, arnr-strength,
arnr-type) and default values for each of them.

Change-Id: Ib261028d501b9523f6e44cb4790cc52167b6e92b

vp8/vp8_cx_iface.c

@@ -63,9 +63,9 @@ static const struct extraconfig_map extracfg_map[] =
             0,                          /* Sharpness */
             0,                          /* static_thresh */
             VP8_ONE_TOKENPARTITION,     /* token_partitions */
-            0, /* arnr_max_frames */
-            0, /* arnr_strength */
-            0, /* arnr_type*/
+            0,                          /* arnr_max_frames */
+            3,                          /* arnr_strength */
+            3,                          /* arnr_type*/
         }
     }
 };
@@ -183,9 +183,9 @@ static vpx_codec_err_t validate_config(vpx_codec_alg_priv_t      *ctx,
 
     RANGE_CHECK(vp8_cfg, token_partitions,   VP8_ONE_TOKENPARTITION, VP8_EIGHT_TOKENPARTITION);
     RANGE_CHECK_HI(vp8_cfg, Sharpness,       7);
-    RANGE_CHECK_HI(vp8_cfg, arnr_max_frames, 15);
-    RANGE_CHECK_HI(vp8_cfg, arnr_strength,   6);
-    RANGE_CHECK_HI(vp8_cfg, arnr_type,       0xffffffff);
+    RANGE_CHECK(vp8_cfg, arnr_max_frames, 0, 15);
+    RANGE_CHECK(vp8_cfg, arnr_strength,   1, 6);
+    RANGE_CHECK(vp8_cfg, arnr_type,       1, 3);
 
     if (cfg->g_pass == VPX_RC_LAST_PASS)
     {