Commit 788c0eb5 authored by Paul Wilkins's avatar Paul Wilkins

Tune effect of motion on KF/GF boost in two pass;

This code adjust the impact of the amount and speed of motion
on GF and KF boost.

Sections with lots of slow motion will tend to have a
somewhat bigger boost and sections with fast motion may
have less.

There is a knock on effect to the selection of the active
quantizer range.

This will likely require further tuning but helps with a couple
of particularly bad edge cases.

Change-Id: Ic2449cda7305672b69acf42fc0a845b77ac98d40
parent f143a811
......@@ -1218,10 +1218,7 @@ static void define_gf_group(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
double mv_accumulator_rabs = 0.0;
double mv_accumulator_cabs = 0.0;
double this_mv_rabs;
double this_mv_cabs;
double mv_ratio_accumulator = 0.0;
double distance_factor = 0.0;
double decay_accumulator = 1.0;
double boost_factor = IIFACTOR;
......@@ -1270,9 +1267,10 @@ static void define_gf_group(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
while (((i < cpi->max_gf_interval) || ((cpi->frames_to_key - i) < MIN_GF_INTERVAL)) && (i < cpi->frames_to_key))
{
double r;
double motion_factor;
double this_frame_mvr_ratio;
double this_frame_mvc_ratio;
double motion_decay;
double motion_pct = next_frame.pcnt_motion;
i++; // Increment the loop counter
......@@ -1287,12 +1285,8 @@ static void define_gf_group(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
break;
// Accumulate motion stats.
motion_factor = next_frame.pcnt_motion;
this_mv_rabs = fabs(next_frame.mvr_abs * motion_factor);
this_mv_cabs = fabs(next_frame.mvc_abs * motion_factor);
mv_accumulator_rabs += fabs(next_frame.mvr_abs * motion_factor);
mv_accumulator_cabs += fabs(next_frame.mvc_abs * motion_factor);
mv_accumulator_rabs += fabs(next_frame.mvr_abs * motion_pct);
mv_accumulator_cabs += fabs(next_frame.mvc_abs * motion_pct);
//Accumulate Motion In/Out of frame stats
this_frame_mv_in_out = next_frame.mv_in_out_count * next_frame.pcnt_motion;
......@@ -1300,13 +1294,23 @@ static void define_gf_group(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
abs_mv_in_out_accumulator += fabs(next_frame.mv_in_out_count * next_frame.pcnt_motion);
// If there is a significant amount of motion
if (motion_factor > 0.05)
if (motion_pct > 0.05)
{
this_frame_mvr_ratio = fabs(next_frame.mvr_abs) / DOUBLE_DIVIDE_CHECK(fabs(next_frame.MVr));
this_frame_mvc_ratio = fabs(next_frame.mvc_abs) / DOUBLE_DIVIDE_CHECK(fabs(next_frame.MVc));
this_frame_mvr_ratio = fabs(next_frame.mvr_abs) /
DOUBLE_DIVIDE_CHECK(fabs(next_frame.MVr));
this_frame_mvc_ratio = fabs(next_frame.mvc_abs) /
DOUBLE_DIVIDE_CHECK(fabs(next_frame.MVc));
mv_ratio_accumulator +=
(this_frame_mvr_ratio < next_frame.mvr_abs)
? (this_frame_mvr_ratio * motion_pct)
: next_frame.mvr_abs * motion_pct;
mv_ratio_accumulator += (this_frame_mvr_ratio < next_frame.mvr_abs) ? (this_frame_mvr_ratio * motion_factor) : next_frame.mvr_abs * motion_factor;
mv_ratio_accumulator += (this_frame_mvc_ratio < next_frame.mvc_abs) ? (this_frame_mvc_ratio * motion_factor) : next_frame.mvc_abs * motion_factor;
mv_ratio_accumulator +=
(this_frame_mvc_ratio < next_frame.mvc_abs)
? (this_frame_mvc_ratio * motion_pct)
: next_frame.mvc_abs * motion_pct;
}
else
{
......@@ -1334,14 +1338,26 @@ static void define_gf_group(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
loop_decay_rate = next_frame.pcnt_inter;
// High % motion -> somewhat higher decay rate
if ((1.0 - (next_frame.pcnt_motion / 10.0)) < loop_decay_rate)
loop_decay_rate = (1.0 - (next_frame.pcnt_motion / 10.0));
motion_decay = (1.0 - (motion_pct / 20.0));
if (motion_decay < loop_decay_rate)
loop_decay_rate = motion_decay;
distance_factor = sqrt((this_mv_rabs * this_mv_rabs) + (this_mv_cabs * this_mv_cabs)) / 300.0;
distance_factor = ((distance_factor > 1.0) ? 0.0 : (1.0 - distance_factor));
if (distance_factor < loop_decay_rate)
loop_decay_rate = distance_factor;
// Adjustment to decay rate based on speed of motion
{
double this_mv_rabs;
double this_mv_cabs;
double distance_factor;
this_mv_rabs = fabs(next_frame.mvr_abs * motion_pct);
this_mv_cabs = fabs(next_frame.mvc_abs * motion_pct);
distance_factor = sqrt((this_mv_rabs * this_mv_rabs) +
(this_mv_cabs * this_mv_cabs)) / 250.0;
distance_factor = ((distance_factor > 1.0)
? 0.0 : (1.0 - distance_factor));
if (distance_factor < loop_decay_rate)
loop_decay_rate = distance_factor;
}
// Cumulative effect of decay
decay_accumulator = decay_accumulator * loop_decay_rate;
......@@ -2281,6 +2297,8 @@ void vp8_find_next_key_frame(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
for (i = 0 ; i < cpi->frames_to_key ; i++)
{
double r;
double motion_decay;
double motion_pct = next_frame.pcnt_motion;
if (EOF == vp8_input_stats(cpi, &next_frame))
break;
......@@ -2294,10 +2312,30 @@ void vp8_find_next_key_frame(VP8_COMP *cpi, FIRSTPASS_STATS *this_frame)
//if ( next_frame.pcnt_inter < loop_decay_rate )
loop_decay_rate = next_frame.pcnt_inter;
if ((1.0 - (next_frame.pcnt_motion / 10.0)) < loop_decay_rate)
loop_decay_rate = (1.0 - (next_frame.pcnt_motion / 10.0));
// High % motion -> somewhat higher decay rate
motion_decay = (1.0 - (motion_pct / 20.0));
if (motion_decay < loop_decay_rate)
loop_decay_rate = motion_decay;
// Adjustment to decay rate based on speed of motion
{
double this_mv_rabs;
double this_mv_cabs;
double distance_factor;
this_mv_rabs = fabs(next_frame.mvr_abs * motion_pct);
this_mv_cabs = fabs(next_frame.mvc_abs * motion_pct);
distance_factor = sqrt((this_mv_rabs * this_mv_rabs) +
(this_mv_cabs * this_mv_cabs)) / 250.0;
distance_factor = ((distance_factor > 1.0)
? 0.0 : (1.0 - distance_factor));
if (distance_factor < loop_decay_rate)
loop_decay_rate = distance_factor;
}
decay_accumulator = decay_accumulator * loop_decay_rate;
decay_accumulator = decay_accumulator < 0.1 ? 0.1 : decay_accumulator;
boost_score += (decay_accumulator * r);
......
......@@ -4247,7 +4247,7 @@ static void encode_frame_to_data_rate
if (cpi->avg_frame_qindex < cpi->active_worst_quality)
Q = cpi->avg_frame_qindex;
if ( cpi->gfu_boost > 1000 )
if ( cpi->gfu_boost > 1000 )
cpi->active_best_quality = gf_low_motion_minq[Q];
else if ( cpi->gfu_boost < 400 )
cpi->active_best_quality = gf_high_motion_minq[Q];
......@@ -4265,7 +4265,7 @@ static void encode_frame_to_data_rate
// KEY FRAMES
else
{
if (cpi->gfu_boost > 1000)
if (cpi->gfu_boost > 600)
cpi->active_best_quality = kf_low_motion_minq[Q];
else
cpi->active_best_quality = kf_high_motion_minq[Q];
......
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