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rc: changed the way frame size predictors are initialized/handled in 1st/2nd pass

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rwillenbacher 2022-03-09 18:59:42 +01:00
parent ae31172c03
commit 772d19ab52
1 changed files with 74 additions and 14 deletions
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88
src/y262/ratectrl.c
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@ -30,7 +30,7 @@ POSSIBILITY OF SUCH DAMAGE.
#include "y262.h"
void y262_ratctrl_init_predictor_2pass( y262_t *ps_y262 );
bool_t y262_ratectrl_init( y262_t *ps_y262 )
{
@ -51,15 +51,15 @@ bool_t y262_ratectrl_init( y262_t *ps_y262 )
ps_ratectrl->i64_output_frames = 0;
ps_ratectrl->i64_output_seconds = 0;
ps_ratectrl->d_output_bits = 200.0;
ps_ratectrl->d_qb_qplx = 12.0 * 200.0;
ps_ratectrl->d_qb_qplx = 10.0 * 200.0;
ps_ratectrl->d_target_bits = 200.0;
ps_ratectrl->rgd_satd_predictors[ 0 ] = 1.0;
ps_ratectrl->rgd_satd_predictors_weight[ 0 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 1 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 1 ] = 0.3;
ps_ratectrl->rgd_satd_predictors_weight[ 1 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 2 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 2 ] = 0.15;
ps_ratectrl->rgd_satd_predictors_weight[ 2 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 3 ] = 1.0;
ps_ratectrl->rgd_satd_predictors[ 3 ] = 0.075;
ps_ratectrl->rgd_satd_predictors_weight[ 3 ] = 1.0;
ps_ratectrl->d_confidence_predict_behind = 1.0;
ps_ratectrl->d_confidence_predict_ahead = 1.0;
@ -156,6 +156,8 @@ bool_t y262_ratectrl_init( y262_t *ps_y262 )
ps_ratectrl->d_qb_qplx_2p *= d_adjust;
ps_ratectrl->i_current_sample = 0;
ps_ratectrl->i_num_samples = i_num_samples;
y262_ratctrl_init_predictor_2pass( ps_y262 );
}
ps_ratectrl->i_picture_scaled_satd = 0;
@ -297,6 +299,49 @@ int32_t y262_ratectrl_predict_frame_size_2pass( y262_t *ps_y262, int32_t i_pictu
return ( int32_t ) d_predicted;
}
/* to get satd pred started in 2pass */
void y262_ratctrl_init_predictor_2pass( y262_t *ps_y262 )
{
int32_t i_picture_type, i_idx, i_count, i_baseline;
y262_bitrate_control_t *ps_ratectrl;
double d_satd_pred, d_satd_pred_weight, d_weight;
ps_ratectrl = &ps_y262->s_ratectrl;
for( i_picture_type = 1; i_picture_type <= 3; i_picture_type++ )
{
i_baseline = y262_ratectrl_predict_frame_size_baseline( ps_y262, i_picture_type );
ps_ratectrl->rgd_satd_predictors[ i_picture_type ] = 1.0;
ps_ratectrl->rgd_satd_predictors_weight[ i_picture_type ] = 1.0;
d_satd_pred = d_satd_pred_weight = 0.0;
d_weight = 1.0;
i_count = 0;
for( i_idx = 0; i_idx < ps_ratectrl->i_num_samples; i_idx++ )
{
y262_ratectrl_isample_t *ps_sample = &ps_ratectrl->ps_samples[ i_idx ];
if( ps_sample->ui8_frame_type == i_picture_type && ps_sample->i_satd_cost > ps_ratectrl->i_min_satd_for_satd_prediction )
{
d_satd_pred += ( ( MAX( ps_sample->i_bits - i_baseline, i_baseline * 0.05 ) * ps_sample->d_quantizer ) / ps_sample->i_satd_cost ) * d_weight;
d_satd_pred_weight += d_weight;
d_weight = d_weight * 0.5;
i_count++;
if( i_count >= 3 )
{
break;
}
}
}
if( i_count > 0 )
{
ps_ratectrl->rgd_satd_predictors[ i_picture_type ] = ( d_satd_pred / d_satd_pred_weight ) * 0.5;
ps_ratectrl->rgd_satd_predictors_weight[ i_picture_type ] = 0.5;
}
}
}
int32_t y262_ratectrl_predict_first_frame_size( y262_t *ps_y262, int32_t i_picture_type, int32_t i_picture_cost, double d_quantizer, int32_t i_don, int32_t i_which )
{
@ -857,23 +902,38 @@ void y262_ratectrl_end_picture( y262_t *ps_y262, int32_t i_bits )
/* update confidence */
if( ps_ratectrl->i_mode == BITRATE_CONTROL_PASS2 )
{
double d_delta_behind, d_conf_behind;
double d_delta_ahead, d_conf_ahead;
double d_conf_behind;
double d_conf_ahead;
d_delta_behind = ps_ratectrl->i_predicted_frame_size_behind - i_bits;
d_delta_ahead = ps_ratectrl->i_predicted_frame_size_ahead - i_bits;
d_conf_behind = ps_ratectrl->i_predicted_frame_size_behind / ( double ) i_bits;
d_conf_ahead = ps_ratectrl->i_predicted_frame_size_ahead / ( double ) i_bits;
d_delta_behind *= d_delta_behind;
d_delta_ahead *= d_delta_ahead;
d_conf_behind = 1.0 / MAX( d_delta_behind, 1.0 );
d_conf_ahead = 1.0 / MAX( d_delta_ahead, 1.0 );
if( d_conf_behind > 1.0 )
{
d_conf_behind = 1.0 / d_conf_behind;
}
if( d_conf_ahead > 1.0 )
{
d_conf_ahead = 1.0 / d_conf_ahead;
}
/*fprintf( stderr, "pred actual %d, merge: %d, behind: %d ( %f ), ahead: %d ( %f )\n", i_bits, ps_ratectrl->i_predicted_frame_size, ps_ratectrl->i_predicted_frame_size_behind, d_conf_behind, ps_ratectrl->i_predicted_frame_size_ahead, d_conf_ahead );*/
ps_ratectrl->d_confidence_predict_behind = ( ps_ratectrl->d_confidence_predict_behind * 0.5 ) + d_conf_behind;
ps_ratectrl->d_confidence_predict_ahead = ( ps_ratectrl->d_confidence_predict_ahead * 0.5 ) + d_conf_ahead;
}
else
{
/*
double d_conf_behind;
d_conf_behind = ps_ratectrl->i_predicted_frame_size_behind / ( double ) i_bits;
if( d_conf_behind > 1.0 )
{
d_conf_behind = 1.0 / d_conf_behind;
}
fprintf( stderr, "pred actual %d, merge: %d, behind: %d ( %f )\n", i_bits, ps_ratectrl->i_predicted_frame_size, ps_ratectrl->i_predicted_frame_size_behind, d_conf_behind );
*/
}
if( i_picture_type != PICTURE_CODING_TYPE_B )
{