ref: 454330873e1c6b10b389bdcd40530c23dee33bae
parent: aef369f536ecb89ab94c2c6bc6b6e0a767fab39d
author: Jean-Marc Valin <jmvalin@jmvalin.ca>
date: Wed May 31 23:08:58 EDT 2017
Let CBR use more bits for dynalloc It seems like letting CBR use up to 2/3 of the bit is still a win
--- a/celt/celt_encoder.c
+++ b/celt/celt_encoder.c
@@ -1076,11 +1076,11 @@
boost = (int)SHR32(EXTEND32(follower[i])*width/6,DB_SHIFT);
boost_bits = boost*6<<BITRES;
}
- /* For CBR and non-transient CVBR frames, limit dynalloc to 1/4 of the bits */
+ /* For CBR and non-transient CVBR frames, limit dynalloc to 2/3 of the bits */
if ((!vbr || (constrained_vbr&&!isTransient))
- && (tot_boost+boost_bits)>>BITRES>>3 > effectiveBytes/4)
+ && (tot_boost+boost_bits)>>BITRES>>3 > 2*effectiveBytes/3)
{- opus_int32 cap = ((effectiveBytes/4)<<BITRES<<3);
+ opus_int32 cap = ((2*effectiveBytes/3)<<BITRES<<3);
offsets[i] = cap-tot_boost;
tot_boost = cap;
break;