Fix another multithreaded encoder loopfilter race condition

After a key frame encoding, the frame type could change while
filtering is still going on. Pass the frame type as parameter to the
loopfilter function and don't read it from common storage.

vp8cx_set_alt_lf_level has to be done before packing the stream.
Currently alt_lf_level is not used so there hasn't been any visible
problem here.

Change-Id: Ia114162158cd833c2b16e3b89303cc9c91f19165

vp8/common/loopfilter.c

diff --git a/vp8/common/loopfilter.c b/vp8/common/loopfilter.c
index 3f05efe..b9ac0ff 100644
--- a/vp8/common/loopfilter.c
+++ b/vp8/common/loopfilter.c
@@ -196,18 +196,14 @@
     }
 }
 
-void vp8_loop_filter_frame
-(
-    VP8_COMMON *cm,
-    MACROBLOCKD *mbd
-)
+void vp8_loop_filter_frame(VP8_COMMON *cm,
+                           MACROBLOCKD *mbd,
+                           int frame_type)
 {
     YV12_BUFFER_CONFIG *post = cm->frame_to_show;
     loop_filter_info_n *lfi_n = &cm->lf_info;
     loop_filter_info lfi;
 
-    FRAME_TYPE frame_type = cm->frame_type;
-
     int mb_row;
     int mb_col;
     int mb_rows = cm->mb_rows;

vp8/common/loopfilter.h

diff --git a/vp8/common/loopfilter.h b/vp8/common/loopfilter.h
index 0fa8375..0497271 100644
--- a/vp8/common/loopfilter.h
+++ b/vp8/common/loopfilter.h
@@ -76,7 +76,8 @@
                                 struct macroblockd *mbd,
                                 int default_filt_lvl);
 
-void vp8_loop_filter_frame(struct VP8Common *cm, struct macroblockd *mbd);
+void vp8_loop_filter_frame(struct VP8Common *cm, struct macroblockd *mbd,
+                           int frame_type);
 
 void vp8_loop_filter_partial_frame(struct VP8Common *cm,
                                    struct macroblockd *mbd,

vp8/decoder/onyxd_if.c

diff --git a/vp8/decoder/onyxd_if.c b/vp8/decoder/onyxd_if.c
index 50d609d..e9d1a56 100644
--- a/vp8/decoder/onyxd_if.c
+++ b/vp8/decoder/onyxd_if.c
@@ -471,7 +471,7 @@
         if(cm->filter_level)
         {
             /* Apply the loop filter if appropriate. */
-            vp8_loop_filter_frame(cm, &pbi->mb);
+            vp8_loop_filter_frame(cm, &pbi->mb, cm->frame_type);
         }
         vp8_yv12_extend_frame_borders(cm->frame_to_show);
     }

vp8/encoder/onyx_if.c

diff --git a/vp8/encoder/onyx_if.c b/vp8/encoder/onyx_if.c
index 5f23915..a201549 100644
--- a/vp8/encoder/onyx_if.c
+++ b/vp8/encoder/onyx_if.c
@@ -3117,6 +3117,8 @@
 
 void vp8_loopfilter_frame(VP8_COMP *cpi, VP8_COMMON *cm)
 {
+    const FRAME_TYPE frame_type = cm->frame_type;
+
     if (cm->no_lpf)
     {
         cm->filter_level = 0;
@@ -3134,6 +3136,11 @@
         else
             vp8cx_pick_filter_level(cpi->Source, cpi);
 
+        if (cm->filter_level > 0)
+        {
+            vp8cx_set_alt_lf_level(cpi, cm->filter_level);
+        }
+
         vpx_usec_timer_mark(&timer);
         cpi->time_pick_lpf += vpx_usec_timer_elapsed(&timer);
     }
@@ -3145,8 +3152,7 @@
 
     if (cm->filter_level > 0)
     {
-        vp8cx_set_alt_lf_level(cpi, cm->filter_level);
-        vp8_loop_filter_frame(cm, &cpi->mb.e_mbd);
+        vp8_loop_filter_frame(cm, &cpi->mb.e_mbd, frame_type);
     }
 
     vp8_yv12_extend_frame_borders(cm->frame_to_show);