tree a1aad77af14f3fca973ba160282e1cbd317f0b61
parent c4fe78a18b289c8858fe8cf44403be567fc4621e
author Marco Paniconi <marpan@google.com> 1597772804 -0700
committer Marco Paniconi <marpan@google.com> 1597871528 +0000

rtc: Add off state for coeff/mode-upd-freq

Add off state for coeff/mode-cost-upd-freq.
The mv-cost-upd-freq already has off state, which
is set as default for RTC.

Setting coeff/mode-cost-upd-freq to off/3
(compared to 2 as used in rtc) has the following
stats (note there are bdrate gains for speeed >=8 on vga/hd).
Speedup is rough estimate on x86 over a few clips
for each set.

speed 7 (bdrate loss):
rtc-derf: avg 4.2%, max 7.9%; speedup ~5%
rtc:      avg 1%, max 7%; speedup ~4%

speed 8 (bdrate gain on rtc set):
rtc-derf: avg 0.6, max 1.6%, speedup ~5%
rtc:      avg -1.3, max -6%; speedup ~2%

speed 9 (bdrate gain on rtc set):
rtc-derf: avg 0.58%, max 1.6%; speeedup ~3%
rtc:      avg -1.2%, max -5%; speedup ~2%

Change-Id: I72aad4e80e9042d2169f32a8517537d7f7332543