ref: 806e1c9843b90a94607e1ef3673b0e094d5df551
parent: c41c4752a14b917a2155a5003d3e50efbb3b790b
author: Jingning Han <[email protected]>
date: Thu Nov 29 06:37:00 EST 2018
Factor key frame qp selection from two-pass qp and bound decision Factor out this common code needed all rate control modes. Change-Id: If17850fbebcdce7ff24afb211aa2e6054486b814
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -1271,6 +1271,77 @@
}
#define STATIC_MOTION_THRESH 95
+
+static int pick_kf_q_bound_two_pass(const VP9_COMP *cpi, int *bottom_index,
+ int *top_index) {+ const VP9_COMMON *const cm = &cpi->common;
+ const RATE_CONTROL *const rc = &cpi->rc;
+ const VP9EncoderConfig *const oxcf = &cpi->oxcf;
+ const int cq_level = get_active_cq_level_two_pass(&cpi->twopass, rc, oxcf);
+
+ int q = cq_level;
+ int active_best_quality;
+ int active_worst_quality = cpi->twopass.active_worst_quality;
+
+ if (rc->this_key_frame_forced) {+ // Handle the special case for key frames forced when we have reached
+ // the maximum key frame interval. Here force the Q to a range
+ // based on the ambient Q to reduce the risk of popping.
+ double last_boosted_q;
+ int delta_qindex;
+ int qindex;
+
+ if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) {+ qindex = VPXMIN(rc->last_kf_qindex, rc->last_boosted_qindex);
+ active_best_quality = qindex;
+ last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
+ delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
+ last_boosted_q * 1.25, cm->bit_depth);
+ active_worst_quality =
+ VPXMIN(qindex + delta_qindex, active_worst_quality);
+ } else {+ qindex = rc->last_boosted_qindex;
+ last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
+ delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
+ last_boosted_q * 0.75, cm->bit_depth);
+ active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
+ }
+ } else {+ // Not forced keyframe.
+ double q_adj_factor = 1.0;
+ double q_val;
+ // Baseline value derived from cpi->active_worst_quality and kf boost.
+ active_best_quality =
+ get_kf_active_quality(rc, active_worst_quality, cm->bit_depth);
+ if (cpi->twopass.kf_zeromotion_pct >= STATIC_KF_GROUP_THRESH) {+ active_best_quality /= 4;
+ }
+
+ // Dont allow the active min to be lossless (q0) unlesss the max q
+ // already indicates lossless.
+ active_best_quality =
+ VPXMIN(active_worst_quality, VPXMAX(1, active_best_quality));
+
+ // Allow somewhat lower kf minq with small image formats.
+ if ((cm->width * cm->height) <= (352 * 288)) {+ q_adj_factor -= 0.25;
+ }
+
+ // Make a further adjustment based on the kf zero motion measure.
+ q_adj_factor += 0.05 - (0.001 * (double)cpi->twopass.kf_zeromotion_pct);
+
+ // Convert the adjustment factor to a qindex delta
+ // on active_best_quality.
+ q_val = vp9_convert_qindex_to_q(active_best_quality, cm->bit_depth);
+ active_best_quality +=
+ vp9_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
+ }
+ *top_index = active_worst_quality;
+ *bottom_index = active_best_quality;
+
+ return q;
+}
+
static int rc_pick_q_and_bounds_two_pass(const VP9_COMP *cpi, int *bottom_index,
int *top_index, int gf_group_index) {const VP9_COMMON *const cm = &cpi->common;
@@ -1291,58 +1362,9 @@
// as q.
active_best_quality = cq_level;
active_worst_quality = cq_level;
- } else if (rc->this_key_frame_forced) {- // Handle the special case for key frames forced when we have reached
- // the maximum key frame interval. Here force the Q to a range
- // based on the ambient Q to reduce the risk of popping.
- double last_boosted_q;
- int delta_qindex;
- int qindex;
-
- if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) {- qindex = VPXMIN(rc->last_kf_qindex, rc->last_boosted_qindex);
- active_best_quality = qindex;
- last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
- last_boosted_q * 1.25, cm->bit_depth);
- active_worst_quality =
- VPXMIN(qindex + delta_qindex, active_worst_quality);
- } else {- qindex = rc->last_boosted_qindex;
- last_boosted_q = vp9_convert_qindex_to_q(qindex, cm->bit_depth);
- delta_qindex = vp9_compute_qdelta(rc, last_boosted_q,
- last_boosted_q * 0.75, cm->bit_depth);
- active_best_quality = VPXMAX(qindex + delta_qindex, rc->best_quality);
- }
} else {- // Not forced keyframe.
- double q_adj_factor = 1.0;
- double q_val;
- // Baseline value derived from cpi->active_worst_quality and kf boost.
- active_best_quality =
- get_kf_active_quality(rc, active_worst_quality, cm->bit_depth);
- if (cpi->twopass.kf_zeromotion_pct >= STATIC_KF_GROUP_THRESH) {- active_best_quality /= 4;
- }
-
- // Dont allow the active min to be lossless (q0) unlesss the max q
- // already indicates lossless.
- active_best_quality =
- VPXMIN(active_worst_quality, VPXMAX(1, active_best_quality));
-
- // Allow somewhat lower kf minq with small image formats.
- if ((cm->width * cm->height) <= (352 * 288)) {- q_adj_factor -= 0.25;
- }
-
- // Make a further adjustment based on the kf zero motion measure.
- q_adj_factor += 0.05 - (0.001 * (double)cpi->twopass.kf_zeromotion_pct);
-
- // Convert the adjustment factor to a qindex delta
- // on active_best_quality.
- q_val = vp9_convert_qindex_to_q(active_best_quality, cm->bit_depth);
- active_best_quality +=
- vp9_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
+ pick_kf_q_bound_two_pass(cpi, &active_best_quality,
+ &active_worst_quality);
}
} else if (!rc->is_src_frame_alt_ref &&
(cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {