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Changes to KF boost calculation.

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Remove double counting of decay. Limit maximum KF boost.

Change-Id: I0fb2344d0f78b5e95bb899dfad12b0ca84034b2c
This commit is contained in:
Paul Wilkins 2016-10-12 19:49:19 +01:00 committed by paulwilkins
parent ccd6a8e2fa
commit de859676dd
1 changed files with 7 additions and 9 deletions
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16
vp9/encoder/vp9_firstpass.c
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@ -48,10 +48,8 @@
#define FIRST_PASS_Q 10.0
#define GF_MAX_BOOST 96.0
#define INTRA_MODE_PENALTY 1024
#define KF_MAX_BOOST 128.0
#define MIN_ARF_GF_BOOST 240
#define MIN_DECAY_FACTOR 0.01
#define MIN_KF_BOOST 300
#define NEW_MV_MODE_PENALTY 32
#define SVC_FACTOR_PT_LOW 0.45
#define DARK_THRESH 64
@ -2470,6 +2468,9 @@ static int test_candidate_kf(TWO_PASS *twopass,
}
#define FRAMES_TO_CHECK_DECAY 8
#define KF_MAX_FRAME_BOOST 128.0
#define MIN_KF_TOT_BOOST 300
#define MAX_KF_TOT_BOOST 4800
static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
int i, j;
@ -2484,7 +2485,6 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
int kf_bits = 0;
int loop_decay_counter = 0;
double decay_accumulator = 1.0;
double av_decay_accumulator = 0.0;
double zero_motion_accumulator = 1.0;
double boost_score = 0.0;
double kf_mod_err = 0.0;
@ -2652,7 +2652,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
if ((i <= rc->max_gf_interval) ||
((i <= (rc->max_gf_interval * 4)) && (decay_accumulator > 0.5))) {
const double frame_boost =
calc_frame_boost(cpi, &next_frame, 0, KF_MAX_BOOST);
calc_frame_boost(cpi, &next_frame, 0, KF_MAX_FRAME_BOOST);
// How fast is prediction quality decaying.
if (!detect_flash(twopass, 0)) {
@ -2660,13 +2660,11 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
get_prediction_decay_rate(cpi, &next_frame);
decay_accumulator *= loop_decay_rate;
decay_accumulator = VPXMAX(decay_accumulator, MIN_DECAY_FACTOR);
av_decay_accumulator += decay_accumulator;
++loop_decay_counter;
}
boost_score += (decay_accumulator * frame_boost);
}
}
av_decay_accumulator /= (double)loop_decay_counter;
reset_fpf_position(twopass, start_position);
@ -2678,9 +2676,9 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
start_position, twopass->stats_in_end, rc->frames_to_key);
// Apply various clamps for min and max boost
rc->kf_boost = (int)(av_decay_accumulator * boost_score);
rc->kf_boost = VPXMAX(rc->kf_boost, (rc->frames_to_key * 3));
rc->kf_boost = VPXMAX(rc->kf_boost, MIN_KF_BOOST);
rc->kf_boost = VPXMAX((int)boost_score, (rc->frames_to_key * 3));
rc->kf_boost = VPXMAX(rc->kf_boost, MIN_KF_TOT_BOOST);
rc->kf_boost = VPXMIN(rc->kf_boost, MAX_KF_TOT_BOOST);
// Work out how many bits to allocate for the key frame itself.
kf_bits = calculate_boost_bits((rc->frames_to_key - 1), rc->kf_boost,