Disable error concealment until first key frame is decoded

When error concealment is enabled the first key frame must
be successfully received before error concealment is activated.
Error concealment will be activated when the delta following
delta frame is received.

Also fixed a couple of bugs related to error tracking in
multi-threading. And avoiding decoding corrupt residual
when we have multiple non-resilient partitions.

Change-Id: I45c4bb296e2f05f57624aef500a874faf431a60d

1 files changed, 21 insertions, 1 deletions

diff --git a/vp8/decoder/onyxd_if.c b/vp8/decoder/onyxd_if.c
index 224619480..db6528c80 100644
--- a/vp8/decoder/onyxd_if.c
+++ b/vp8/decoder/onyxd_if.c
@@ -101,9 +101,21 @@ VP8D_PTR vp8dx_create_decompressor(VP8D_CONFIG *oxcf)
 #else
     pbi->ec_enabled = 0;
 #endif
+    /* Error concealment is activated after a key frame has been
+     * decoded without errors when error concealment is enabled.
+     */
+    pbi->ec_active = 0;
+
+    pbi->decoded_key_frame = 0;
 
     pbi->input_partition = oxcf->input_partition;
 
+    /* Independent partitions is activated when a frame updates the
+     * token probability table to have equal probabilities over the
+     * PREV_COEF context.
+     */
+    pbi->independent_partitions = 0;
+
     return (VP8D_PTR) pbi;
 }
 
@@ -346,11 +358,15 @@ int vp8dx_receive_compressed_data(VP8D_PTR ptr, unsigned long size, const unsign
             /* If error concealment is disabled we won't signal missing frames to
              * the decoder.
              */
-            if (!pbi->ec_enabled)
+            if (!pbi->ec_active)
             {
                 /* Signal that we have no frame to show. */
                 cm->show_frame = 0;
 
+                pbi->num_partitions = 0;
+                if (pbi->input_partition)
+                    pbi->common.multi_token_partition = 0;
+
                 /* Nothing more to do. */
                 return 0;
             }
@@ -379,6 +395,10 @@ int vp8dx_receive_compressed_data(VP8D_PTR ptr, unsigned long size, const unsign
 #endif
             pbi->common.error.setjmp = 0;
 
+            pbi->num_partitions = 0;
+            if (pbi->input_partition)
+                pbi->common.multi_token_partition = 0;
+
            /* We do not know if the missing frame(s) was supposed to update
             * any of the reference buffers, but we act conservative and
             * mark only the last buffer as corrupted.