shithub: libvpx

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vp9-svc: Add bypass flag to constrain inter_layer.

The additional constraint imposed on inter-layer
prediction should only be done for non-bypass (fixed)
svc mode.

Change-Id: Ia22cdb7bc21684776c9a13397e177a1e1c3d55a2

--- a/vp9/encoder/vp9_svc_layercontext.c

+++ b/vp9/encoder/vp9_svc_layercontext.c

@@ -1005,11 +1005,13 @@

       }

     }

   }

-  // Check for disabling inter-layer prediction if the reference for inter-layer

-  // prediction (the reference that is scaled) is not the previous spatial layer

-  // from the same superframe, then we disable inter-layer prediction.

-  // Only need to check when inter_layer prediction is not set to OFF mode.

-  if (svc->disable_inter_layer_pred != INTER_LAYER_PRED_OFF) {

+  // For fixed/non-flexible SVC: check for disabling inter-layer prediction.

+  // If the reference for inter-layer prediction (the reference that is scaled)

+  // is not the previous spatial layer from the same superframe, then we disable

+  // inter-layer prediction. Only need to check when inter_layer prediction is

+  // not set to OFF mode.

+  if (svc->temporal_layering_mode != VP9E_TEMPORAL_LAYERING_MODE_BYPASS &&

+      svc->disable_inter_layer_pred != INTER_LAYER_PRED_OFF) {

     // We only use LAST and GOLDEN for prediction in real-time mode, so we

     // check both here.

     MV_REFERENCE_FRAME ref_frame;