#include "vp9/encoder/vp9_onyx_int.h"
#include "vp9/encoder/vp9_picklpf.h"
#include "vp9/encoder/vp9_quantize.h"
+#include "vp9/common/vp9_quant_common.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_scale/vpx_scale.h"
#include "vp9/common/vp9_alloccommon.h"
#include "vp9/common/vp9_loopfilter.h"
#include "./vpx_scale_rtcd.h"
-void vp9_yv12_copy_partial_frame_c(YV12_BUFFER_CONFIG *src_ybc,
- YV12_BUFFER_CONFIG *dst_ybc, int fraction) {
- const int height = src_ybc->y_height;
- const int stride = src_ybc->y_stride;
- const int offset = stride * ((height >> 5) * 16 - 8);
- const int lines_to_copy = MAX(height >> (fraction + 4), 1) << 4;
-
- assert(src_ybc->y_stride == dst_ybc->y_stride);
- vpx_memcpy(dst_ybc->y_buffer + offset, src_ybc->y_buffer + offset,
- stride * (lines_to_copy + 16));
+static int get_min_filter_level(VP9_COMP *cpi, int base_qindex) {
+ return 0;
}
-static int calc_partial_ssl_err(YV12_BUFFER_CONFIG *source,
- YV12_BUFFER_CONFIG *dest, int Fraction) {
- int i, j;
- int Total = 0;
- int srcoffset, dstoffset;
- uint8_t *src = source->y_buffer;
- uint8_t *dst = dest->y_buffer;
-
- int linestocopy = (source->y_height >> (Fraction + 4));
-
- if (linestocopy < 1)
- linestocopy = 1;
-
- linestocopy <<= 4;
-
-
- srcoffset = source->y_stride * (dest->y_height >> 5) * 16;
- dstoffset = dest->y_stride * (dest->y_height >> 5) * 16;
-
- src += srcoffset;
- dst += dstoffset;
-
- // Loop through the raw Y plane and reconstruction data summing the square
- // differences.
- for (i = 0; i < linestocopy; i += 16) {
- for (j = 0; j < source->y_width; j += 16) {
- unsigned int sse;
- Total += vp9_mse16x16(src + j, source->y_stride, dst + j, dest->y_stride,
- &sse);
- }
-
- src += 16 * source->y_stride;
- dst += 16 * dest->y_stride;
- }
-
- return Total;
+static int get_max_filter_level(VP9_COMP *cpi, int base_qindex) {
+ return cpi->twopass.section_intra_rating > 8 ? MAX_LOOP_FILTER * 3 / 4
+ : MAX_LOOP_FILTER;
}
-// 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;
+// Stub function for now Alt LF not used
+void vp9_set_alt_lf_level(VP9_COMP *cpi, int filt_val) {
}
-// 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;
+static int try_filter_frame(const YV12_BUFFER_CONFIG *sd, VP9_COMP *const cpi,
+ MACROBLOCKD *const xd, VP9_COMMON *const cm,
+ int filt_level, int partial_frame) {
+ int filt_err;
- if (cpi->twopass.section_intra_rating > 8)
- max_filter_level = MAX_LOOP_FILTER * 3 / 4;
+ vp9_set_alt_lf_level(cpi, filt_level);
+ vp9_loop_filter_frame(cm, xd, filt_level, 1, partial_frame);
- return max_filter_level;
-}
+ filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
+ // Re-instate the unfiltered frame
+ vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
-// Stub function for now Alt LF not used
-void vp9_set_alt_lf_level(VP9_COMP *cpi, int filt_val) {
+ return filt_err;
}
-void vp9_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi, int partial) {
+static void search_filter_level(const YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi,
+ int partial_frame) {
+ 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;
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);
-
- 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);
+ int filt_mid = clamp(lf->filter_level, min_filter_level, max_filter_level);
+ int filter_step = filt_mid < 16 ? 4 : filt_mid / 4;
+ // Sum squared error at each filter level
+ int ss_err[MAX_LOOP_FILTER + 1];
- // Define the initial step size
- filter_step = filt_mid < 16 ? 4 : filt_mid / 4;
+ // Set each entry to -1
+ vpx_memset(ss_err, 0xFF, sizeof(ss_err));
- // 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);
+ // Make a copy of the unfiltered / processed recon buffer
+ vpx_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
- best_err = vp9_calc_ss_err(sd, cm->frame_to_show);
+ best_err = try_filter_frame(sd, cpi, xd, cm, filt_mid, partial_frame);
filt_best = filt_mid;
-
- // Re-instate the unfiltered frame
- vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
+ ss_err[filt_mid] = best_err;
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);
+ int filt_err;
+
+ // 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);
-
- filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
-
- // Re-instate the unfiltered frame
- vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
-
+ if (ss_err[filt_low] < 0) {
+ filt_err = try_filter_frame(sd, cpi, xd, cm, filt_low, partial_frame);
+ ss_err[filt_low] = filt_err;
+ } else {
+ filt_err = ss_err[filt_low];
+ }
// 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;
}
// Now look at filt_high
- 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);
-
- filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
-
- // Re-instate the unfiltered frame
- vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
-
+ if (filt_direction >= 0 && filt_high != filt_mid) {
+ if (ss_err[filt_high] < 0) {
+ filt_err = try_filter_frame(sd, cpi, xd, cm, filt_high, partial_frame);
+ ss_err[filt_high] = filt_err;
+ } else {
+ filt_err = ss_err[filt_high];
+ }
// 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;
}
lf->filter_level = filt_best;
}
+
+void vp9_pick_filter_level(const YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi,
+ int method) {
+ VP9_COMMON *const cm = &cpi->common;
+ struct loopfilter *const lf = &cm->lf;
+
+ lf->sharpness_level = cm->frame_type == KEY_FRAME ? 0
+ : cpi->oxcf.sharpness;
+
+ if (method == 2) {
+ 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);
+ const int q = vp9_ac_quant(cm->base_qindex, 0);
+ // These values were determined by linear fitting the result of the
+ // searched level
+ // filt_guess = q * 0.316206 + 3.87252
+ int filt_guess = (q * 20723 + 1015158 + (1 << 17)) >> 18;
+ if (cm->frame_type == KEY_FRAME)
+ filt_guess -= 4;
+ lf->filter_level = clamp(filt_guess, min_filter_level, max_filter_level);
+ } else {
+ search_filter_level(sd, cpi, method == 1);
+ }
+}
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