shithub: libvpx

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ref: e4234b3f8b704250dfcf8f97096534a3eef114d9
parent: a04ed98482700550bf6603c58ce23427390262a8
author: Yaowu Xu <[email protected]>
date: Fri Nov 21 06:55:27 EST 2014 

Separate rate_correction_factor for boosted GFs

When the golden frame is boosted, the rate correction factor is not
correlated well with other inter frames even in CBR mode. This commit
changes to use GF specific rate_correction_factor when gf_cbr_boost
is greater than 20%.

Change-Id: I6312c1564387bcacc11f4c5e8a9cfdc781b5c3ab


--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -370,7 +370,7 @@
   } else {
     if ((cpi->refresh_alt_ref_frame || cpi->refresh_golden_frame) &&
         !rc->is_src_frame_alt_ref && !cpi->use_svc &&
-        cpi->oxcf.rc_mode != VPX_CBR)
+        (cpi->oxcf.rc_mode != VPX_CBR || cpi->oxcf.gf_cbr_boost_pct > 20))
       return rc->rate_correction_factors[GF_ARF_STD];
     else
       return rc->rate_correction_factors[INTER_NORMAL];
@@ -389,7 +389,7 @@
   } else {
     if ((cpi->refresh_alt_ref_frame || cpi->refresh_golden_frame) &&
         !rc->is_src_frame_alt_ref && !cpi->use_svc &&
-        cpi->oxcf.rc_mode != VPX_CBR)
+        (cpi->oxcf.rc_mode != VPX_CBR || cpi->oxcf.gf_cbr_boost_pct > 20))
       rc->rate_correction_factors[GF_ARF_STD] = factor;
     else
       rc->rate_correction_factors[INTER_NORMAL] = factor;