shithub: libvpx

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Corpus VBR tweak for undershoot.

In cases of strong undershoot adjust Q range down faster.

Change-Id: I84982beceb3c9b6dc50e52e4a6e891c7dd395d03

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

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

@@ -3956,6 +3956,11 @@

     // rate miss. If so adjust the active maxQ for the subsequent frames.

     if (q > cpi->twopass.active_worst_quality) {

       cpi->twopass.active_worst_quality = q;

+#ifdef CORPUS_VBR_EXPERIMENT

+    } else if (q == q_low && rc->projected_frame_size < rc->this_frame_target) {

+      cpi->twopass.active_worst_quality =

+          VPXMAX(q, cpi->twopass.active_worst_quality - 1);

+#endif

     }

   }