shithub: libvpx

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Sync ref frame writing with decoder

Enable the encoder to produce compound reference frame writing
that supports both 2 fwd + 1 bwd and 1 fwd + 2 bwd cases.

Change-Id: I63d2141435e2de7d8115d52b974fc41c2e608405

--- a/vp9/encoder/vp9_bitstream.c

+++ b/vp9/encoder/vp9_bitstream.c

@@ -217,7 +217,8 @@

     }

     if (is_compound) {

-      vpx_write(w, mi->ref_frame[0] == GOLDEN_FRAME,

+      const int idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];

+      vpx_write(w, mi->ref_frame[!idx] == cm->comp_var_ref[1],

                 vp9_get_pred_prob_comp_ref_p(cm, xd));

     } else {

       const int bit0 = mi->ref_frame[0] != LAST_FRAME;