ref: 0cb4985b51b804109819249322fad23fca39acd9
parent: b8c369053b8baffc2181b7b362262269f9e346e6
author: Paul Wilkins <paulwilkins@google.com>
date: Thu Jun 7 09:39:20 EDT 2012
Key frame and GF sizing changes. Changes to the equations for kf and gf minQ and to the boost calculations for kg and gf Change-Id: I312031c910e6a575334f49075c32f49a8dfff239
--- a/vp8/encoder/firstpass.c
+++ b/vp8/encoder/firstpass.c
@@ -52,8 +52,8 @@
#define IIFACTOR 12.5
#define IIKFACTOR1 12.5
-#define IIKFACTOR2 12.5
-#define RMAX 96.0
+#define IIKFACTOR2 15.0
+#define RMAX 128.0
#define GF_RMAX 96.0
#define ERR_DIVISOR 150.0
@@ -1716,8 +1716,12 @@
decay_accumulator = decay_accumulator * loop_decay_rate;
// Monitor for static sections.
- zero_motion_accumulator *=
- (next_frame.pcnt_inter - next_frame.pcnt_motion);
+ if ( (next_frame.pcnt_inter - next_frame.pcnt_motion) <
+ zero_motion_accumulator )
+ {+ zero_motion_accumulator =
+ (next_frame.pcnt_inter - next_frame.pcnt_motion);
+ }
// Break clause to detect very still sections after motion
// (for example a staic image after a fade or other transition).
@@ -2525,7 +2529,7 @@
boost_score = 0.0;
loop_decay_rate = 1.00; // Starting decay rate
- for (i = 0 ; i < cpi->twopass.frames_to_key ; i++)
+ for (i = 0; i < cpi->twopass.frames_to_key; i++)
{double r;
@@ -2543,8 +2547,12 @@
r = RMAX;
// Monitor for static sections.
- zero_motion_accumulator *=
- (next_frame.pcnt_inter - next_frame.pcnt_motion);
+ if ( (next_frame.pcnt_inter - next_frame.pcnt_motion) <
+ zero_motion_accumulator )
+ {+ zero_motion_accumulator =
+ (next_frame.pcnt_inter - next_frame.pcnt_motion);
+ }
// How fast is prediction quality decaying
loop_decay_rate = get_prediction_decay_rate(cpi, &next_frame);
@@ -2582,14 +2590,13 @@
kf_boost = 300;
}
- // bigger frame sizes need larger kf boosts, smaller frames smaller boosts...
- if ((lst_yv12->y_width * lst_yv12->y_height) > (320 * 240))
- kf_boost += 12 * (lst_yv12->y_width * lst_yv12->y_height) / (320 * 240);
- else if ((lst_yv12->y_width * lst_yv12->y_height) < (320 * 240))
- kf_boost -= 25 * (320 * 240) / (lst_yv12->y_width * lst_yv12->y_height);
-
if (kf_boost < 250) // Min KF boost
kf_boost = 250;
+
+ // Make a not of baseline boost and the zero motion
+ // accumulator value for use elsewhere.
+ cpi->kf_boost = kf_boost;
+ cpi->kf_zeromotion_pct = (int)(zero_motion_accumulator * 100.0);
// We do three calculations for kf size.
// The first is based on the error score for the whole kf group.
--- a/vp8/encoder/onyx_if.c
+++ b/vp8/encoder/onyx_if.c
@@ -181,7 +181,6 @@
static int kf_low_motion_minq[QINDEX_RANGE];
static int kf_high_motion_minq[QINDEX_RANGE];
static int gf_low_motion_minq[QINDEX_RANGE];
-static int gf_mid_motion_minq[QINDEX_RANGE];
static int gf_high_motion_minq[QINDEX_RANGE];
static int inter_minq[QINDEX_RANGE];
@@ -227,26 +226,20 @@
-0.000015,
0.074,
0.0 );
-
kf_high_motion_minq[i] = calculate_minq_index( maxq,
- 0.00000034,
+ 0.0000004,
-0.000125,
- 0.13,
+ 0.14,
0.0 );
gf_low_motion_minq[i] = calculate_minq_index( maxq,
- 0.0000016,
- -0.00078,
- 0.315,
+ 0.0000015,
+ -0.0009,
+ 0.33,
0.0 );
- gf_mid_motion_minq[i] = calculate_minq_index( maxq,
- 0.00000415,
- -0.0017,
- 0.425,
- 0.0 );
gf_high_motion_minq[i] = calculate_minq_index( maxq,
- 0.00000725,
- -0.00235,
- 0.47,
+ 0.0000021,
+ -0.00125,
+ 0.45,
0.0 );
inter_minq[i] = calculate_minq_index( maxq,
0.00000271,
@@ -3016,11 +3009,29 @@
if ( cm->frame_type == KEY_FRAME )
{- if (cpi->gfu_boost > 600)
- cpi->active_best_quality = kf_low_motion_minq[Q];
+ int high = 2000;
+ int low = 400;
+
+ if ( cpi->kf_boost > high )
+ cpi->active_best_quality = kf_low_motion_minq[Q];
+ else if ( cpi->kf_boost < low )
+ cpi->active_best_quality = kf_high_motion_minq[Q];
else
- cpi->active_best_quality = kf_high_motion_minq[Q];
+ {+ int gap = high - low;
+ int offset = high - cpi->kf_boost;
+ int qdiff = kf_high_motion_minq[Q] - kf_low_motion_minq[Q];
+ int adjustment = ((offset * qdiff) + (gap>>1)) / gap;
+ cpi->active_best_quality = kf_low_motion_minq[Q] + adjustment;
+ }
+
+ // Make an adjustment based on the %s static
+ // The main impact of this is at lower Q to prevent overly large key
+ // frames unless a lot of the image is static.
+ if (cpi->kf_zeromotion_pct < 64 )
+ cpi->active_best_quality += 4 - (cpi->kf_zeromotion_pct >> 4);
+
// Special case for key frames forced because 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
@@ -3040,6 +3051,9 @@
else if (cm->refresh_golden_frame || cpi->common.refresh_alt_ref_frame)
{+ int high = 2000;
+ int low = 400;
+
// Use the lower of cpi->active_worst_quality and recent
// average Q as basis for GF/ARF Q limit unless last frame was
// a key frame.
@@ -3056,13 +3070,20 @@
Q = cpi->cq_target_quality;
}
- if ( cpi->gfu_boost > 1000 )
+ if ( cpi->gfu_boost > high )
cpi->active_best_quality = gf_low_motion_minq[Q];
- else if ( cpi->gfu_boost < 400 )
+ else if ( cpi->gfu_boost < low )
cpi->active_best_quality = gf_high_motion_minq[Q];
else
- cpi->active_best_quality = gf_mid_motion_minq[Q];
+ {+ int gap = high - low;
+ int offset = high - cpi->gfu_boost;
+ int qdiff = gf_high_motion_minq[Q] - gf_low_motion_minq[Q];
+ int adjustment = ((offset * qdiff) + (gap>>1)) / gap;
+ cpi->active_best_quality = gf_low_motion_minq[Q] + adjustment;
+ }
+
// Constrained quality use slightly lower active best.
if ( cpi->oxcf.end_usage == USAGE_CONSTRAINED_QUALITY )
{@@ -3765,7 +3786,7 @@
// in this frame.
update_base_skip_probs( cpi );
-#if 0 && CONFIG_INTERNAL_STATS
+#if 1 && CONFIG_INTERNAL_STATS
{ FILE *f = fopen("tmp.stt", "a");int recon_err;
@@ -3780,7 +3801,7 @@
fprintf(f, "%10d %10d %10d %10d %10d %10d %10d %10d"
"%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f"
"%6d %5d %5d %5d %8d %8.2f %10d %10.3f"
- "%10.3f %8d %10d\n",
+ "%10.3f %8d %10d %10d %10d\n",
cpi->common.current_video_frame, cpi->this_frame_target,
cpi->projected_frame_size, loop_size_estimate,
(cpi->projected_frame_size - cpi->this_frame_target),
@@ -3803,12 +3824,13 @@
cpi->twopass.total_left_stats->coded_error,
(double)cpi->twopass.bits_left /
cpi->twopass.total_left_stats->coded_error,
- cpi->tot_recode_hits, recon_err);
+ cpi->tot_recode_hits, recon_err, cpi->kf_boost,
+ cpi->kf_zeromotion_pct);
else
fprintf(f, "%10d %10d %10d %10d %10d %10d %10d %10d"
"%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f"
"%6d %5d %5d %5d %8d %8.2f %10d %10.3f"
- "%8d %10d\n",
+ "%8d %10d %10d %10d\n",
cpi->common.current_video_frame,
cpi->this_frame_target, cpi->projected_frame_size,
loop_size_estimate,
@@ -3830,7 +3852,8 @@
cpi->twopass.est_max_qcorrection_factor,
(int)cpi->twopass.bits_left,
cpi->twopass.total_left_stats->coded_error,
- cpi->tot_recode_hits, recon_err);
+ cpi->tot_recode_hits, recon_err, cpi->kf_boost,
+ cpi->kf_zeromotion_pct);
fclose(f);
--- a/vp8/encoder/onyx_int.h
+++ b/vp8/encoder/onyx_int.h
@@ -471,8 +471,9 @@
unsigned int frame_branch_ct_8x8 [BLOCK_TYPES_8X8] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES][2];
int gfu_boost;
- int kf_boost;
int last_boost;
+ int kf_boost;
+ int kf_zeromotion_pct;
int target_bandwidth;
struct vpx_codec_pkt_list *output_pkt_list;
--
⑨