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Merge "Cleaning up vp9_picklpf.c file."

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This commit is contained in:
Dmitry Kovalev 2014-01-17 18:19:06 -08:00 committed by Gerrit Code Review
commit 5088631410
1 changed files with 28 additions and 53 deletions
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81
vp9/encoder/vp9_picklpf.c
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@ -20,65 +20,43 @@
#include "vp9/common/vp9_loopfilter.h"
#include "./vpx_scale_rtcd.h"
// Enforce a minimum filter level based upon baseline Q
static int get_min_filter_level(VP9_COMP *cpi, int base_qindex) {
int min_filter_level;
min_filter_level = 0;
return min_filter_level;
return 0;
}
// Enforce a maximum filter level based upon baseline Q
static int get_max_filter_level(VP9_COMP *cpi, int base_qindex) {
int max_filter_level = MAX_LOOP_FILTER;
(void)base_qindex;
if (cpi->twopass.section_intra_rating > 8)
max_filter_level = MAX_LOOP_FILTER * 3 / 4;
return max_filter_level;
return cpi->twopass.section_intra_rating > 8 ? MAX_LOOP_FILTER * 3 / 4
: MAX_LOOP_FILTER;
}
// Stub function for now Alt LF not used
void vp9_set_alt_lf_level(VP9_COMP *cpi, int filt_val) {
}
void vp9_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi, int partial) {
MACROBLOCKD *const xd = &cpi->mb.e_mbd;
VP9_COMMON *const cm = &cpi->common;
struct loopfilter *const lf = &cm->lf;
int best_err = 0;
int filt_err = 0;
const int min_filter_level = get_min_filter_level(cpi, cm->base_qindex);
const int max_filter_level = get_max_filter_level(cpi, cm->base_qindex);
int filter_step;
int filt_high = 0;
// Start search at previous frame filter level
int filt_mid = lf->filter_level;
int filt_low = 0;
int best_err = 0;
int filt_err = 0;
int filt_best;
int filt_direction = 0;
int Bias = 0; // Bias against raising loop filter in favor of lowering it.
// Make a copy of the unfiltered / processed recon buffer
vpx_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
// Start the search at the previous frame filter level unless it is now out of
// range.
int filt_mid = clamp(lf->filter_level, min_filter_level, max_filter_level);
int filter_step = filt_mid < 16 ? 4 : filt_mid / 4;
lf->sharpness_level = cm->frame_type == KEY_FRAME ? 0
: cpi->oxcf.sharpness;
// Start the search at the previous frame filter level unless it is now out of
// range.
filt_mid = clamp(lf->filter_level, min_filter_level, max_filter_level);
// Define the initial step size
filter_step = filt_mid < 16 ? 4 : filt_mid / 4;
// Make a copy of the unfiltered / processed recon buffer
vpx_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
// Get baseline error score
vp9_set_alt_lf_level(cpi, filt_mid);
vp9_loop_filter_frame(cm, &cpi->mb.e_mbd, filt_mid, 1, partial);
vp9_loop_filter_frame(cm, xd, filt_mid, 1, partial);
best_err = vp9_calc_ss_err(sd, cm->frame_to_show);
filt_best = filt_mid;
@ -87,35 +65,32 @@ void vp9_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi, int partial) {
vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
while (filter_step > 0) {
Bias = (best_err >> (15 - (filt_mid / 8))) * filter_step;
const int filt_high = MIN(filt_mid + filter_step, max_filter_level);
const int filt_low = MAX(filt_mid - filter_step, min_filter_level);
// Bias against raising loop filter in favor of lowering it.
int bias = (best_err >> (15 - (filt_mid / 8))) * filter_step;
if (cpi->twopass.section_intra_rating < 20)
Bias = Bias * cpi->twopass.section_intra_rating / 20;
bias = bias * cpi->twopass.section_intra_rating / 20;
// yx, bias less for large block size
if (cpi->common.tx_mode != ONLY_4X4)
Bias >>= 1;
if (cm->tx_mode != ONLY_4X4)
bias >>= 1;
filt_high = ((filt_mid + filter_step) > max_filter_level)
? max_filter_level
: (filt_mid + filter_step);
filt_low = ((filt_mid - filter_step) < min_filter_level)
? min_filter_level
: (filt_mid - filter_step);
if ((filt_direction <= 0) && (filt_low != filt_mid)) {
if (filt_direction <= 0 && filt_low != filt_mid) {
// Get Low filter error score
vp9_set_alt_lf_level(cpi, filt_low);
vp9_loop_filter_frame(cm, &cpi->mb.e_mbd, filt_low, 1, partial);
vp9_loop_filter_frame(cm, xd, filt_low, 1, partial);
filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
// Re-instate the unfiltered frame
// Re-instate the unfiltered frame
vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
// If value is close to the best so far then bias towards a lower loop
// filter value.
if ((filt_err - Bias) < best_err) {
if ((filt_err - bias) < best_err) {
// Was it actually better than the previous best?
if (filt_err < best_err)
best_err = filt_err;
@ -125,9 +100,9 @@ void vp9_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi, int partial) {
}
// Now look at filt_high
if ((filt_direction >= 0) && (filt_high != filt_mid)) {
if (filt_direction >= 0 && filt_high != filt_mid) {
vp9_set_alt_lf_level(cpi, filt_high);
vp9_loop_filter_frame(cm, &cpi->mb.e_mbd, filt_high, 1, partial);
vp9_loop_filter_frame(cm, xd, filt_high, 1, partial);
filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
@ -135,7 +110,7 @@ void vp9_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi, int partial) {
vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
// Was it better than the previous best?
if (filt_err < (best_err - Bias)) {
if (filt_err < (best_err - bias)) {
best_err = filt_err;
filt_best = filt_high;
}