shithub: libvpx

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Point show frame buffer towards existing frame buffer

When the show_existing_frame mode is on, directly point the new
frame pointer towards the existing reference frame buffer entry.

Change-Id: Ic50b25655fe95ea702fb529afacb7701ec17adcb

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -4829,6 +4829,13 @@

     encode_with_recode_loop(cpi, size, dest);

   }

+  // TODO(jingning): When using show existing frame mode, we assume that the

+  // current ARF will be directly used as the final reconstructed frame. This is

+  // an encoder control scheme. One could in principle explore other

+  // possibilities to arrange the reference frame buffer and their coding order.

+  if (cm->show_existing_frame)

+    cm->new_fb_idx = cm->ref_frame_map[cpi->alt_fb_idx];

+

   cpi->last_frame_dropped = 0;

   cpi->svc.last_layer_dropped[cpi->svc.spatial_layer_id] = 0;

   // Keep track of the frame buffer index updated/refreshed for the