shithub: libvpx

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Removal of a couple of two pass adjustments.

Removed a couple of adjustments that no longer move the needle
much but complicate the process of tuning.

Change-Id: Ie320f5cf155e6aac14a4757ea9ada2cd59f27590

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -1578,7 +1578,7 @@

     sr_decay = 1.0 - (SR_DIFF_PART * sr_diff) - motion_amplitude_part -

                (INTRA_PART * modified_pcnt_intra);

   }

-  return VPXMAX(sr_decay, VPXMIN(DEFAULT_DECAY_LIMIT, modified_pct_inter));

+  return VPXMAX(sr_decay, DEFAULT_DECAY_LIMIT);

 }

 // This function gives an estimate of how badly we believe the prediction

@@ -1695,16 +1695,13 @@

   // Underlying boost factor is based on inter error ratio.

   frame_boost = (BASELINE_ERR_PER_MB * num_mbs) /

                 DOUBLE_DIVIDE_CHECK(this_frame->coded_error);

-  frame_boost = frame_boost * BOOST_FACTOR * boost_q_correction;

-  // Increase boost for frames where new data coming into frame (e.g. zoom out).

-  // Slightly reduce boost if there is a net balance of motion out of the frame

-  // (zoom in). The range for this_frame_mv_in_out is -1.0 to +1.0.

+  // Small adjustment for cases where there is a zoom out

   if (this_frame_mv_in_out > 0.0)

     frame_boost += frame_boost * (this_frame_mv_in_out * 2.0);

-  // In the extreme case the boost is halved.

-  else

-    frame_boost += frame_boost * (this_frame_mv_in_out / 2.0);

+

+  // Q correction and scalling

+  frame_boost = frame_boost * BOOST_FACTOR * boost_q_correction;

   return VPXMIN(frame_boost, max_boost * boost_q_correction);

 }