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| author | Debargha Mukherjee <debargha@google.com> | 2015-04-07 16:15:11 -0700 |
|---|---|---|
| committer | Debargha Mukherjee <debargha@google.com> | 2015-04-07 16:29:21 -0700 |
| commit | 60bd744c8800423fe28deb65d9129030f2928332 (patch) | |
| tree | 7461bc42dc488a150772e2a0f55f01c2b5c8e924 /vp9/encoder | |
| parent | 5eee2a88f88ff1d475b12e62357c38399b583802 (diff) | |
| download | libvpx-60bd744c8800423fe28deb65d9129030f2928332.tar libvpx-60bd744c8800423fe28deb65d9129030f2928332.tar.gz libvpx-60bd744c8800423fe28deb65d9129030f2928332.tar.bz2 libvpx-60bd744c8800423fe28deb65d9129030f2928332.zip | |
Improve accuracy of rate control in CQ mode
Modifies a special handling that improves rate control accuracy in
the constrained quality mode, when the undershoot and overshoot
limits are set tighter.
Change-Id: If62103f0ef3ed1cac92807400678c93da50cf046
Diffstat (limited to 'vp9/encoder')
| -rw-r--r-- | vp9/encoder/vp9_firstpass.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c index 380f0b78a..bf9e50047 100644 --- a/vp9/encoder/vp9_firstpass.c +++ b/vp9/encoder/vp9_firstpass.c @@ -2612,6 +2612,7 @@ void vp9_rc_get_second_pass_params(VP9_COMP *cpi) { } #define MINQ_ADJ_LIMIT 48 +#define MINQ_ADJ_LIMIT_CQ 20 void vp9_twopass_postencode_update(VP9_COMP *cpi) { TWO_PASS *const twopass = &cpi->twopass; RATE_CONTROL *const rc = &cpi->rc; @@ -2651,7 +2652,7 @@ void vp9_twopass_postencode_update(VP9_COMP *cpi) { const int maxq_adj_limit = rc->worst_quality - twopass->active_worst_quality; const int minq_adj_limit = - (cpi->oxcf.rc_mode == VPX_CQ) ? 0 : MINQ_ADJ_LIMIT; + (cpi->oxcf.rc_mode == VPX_CQ ? MINQ_ADJ_LIMIT_CQ : MINQ_ADJ_LIMIT); // Undershoot. if (rc->rate_error_estimate > cpi->oxcf.under_shoot_pct) { |