libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_picklpf.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include <assert.h>
 #include <limits.h>
+
+#include "./vpx_scale_rtcd.h"
+
+#include "vpx_mem/vpx_mem.h"
+
+#include "vp9/common/vp9_loopfilter.h"
 #include "vp9/common/vp9_onyxc_int.h"
+#include "vp9/common/vp9_quant_common.h"
+
 #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"
 
-static int get_min_filter_level(VP9_COMP *cpi, int base_qindex) {
-  return 0;
-}
-
-static int get_max_filter_level(VP9_COMP *cpi, int base_qindex) {
+static int get_max_filter_level(VP9_COMP *cpi) {
   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) {
-}
 
 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) {
+  VP9_COMMON *const cm = &cpi->common;
   int filt_err;
 
-  vp9_set_alt_lf_level(cpi, filt_level);
-  vp9_loop_filter_frame(cm, xd, filt_level, 1, partial_frame);
-
-  filt_err = vp9_calc_ss_err(sd, cm->frame_to_show);
+  vp9_loop_filter_frame(cm, &cpi->mb.e_mbd, filt_level, 1, partial_frame);
+  filt_err = vp9_get_y_sse(sd, cm->frame_to_show);
 
   // Re-instate the unfiltered frame
   vpx_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
 
   return filt_err;
 }
 
 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;
-  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 min_filter_level = 0;
+  const int max_filter_level = get_max_filter_level(cpi);
   int best_err;
   int filt_best;
   int filt_direction = 0;
   // 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;
   // Sum squared error at each filter level
   int ss_err[MAX_LOOP_FILTER + 1];
 
   // Set each entry to -1
   vpx_memset(ss_err, 0xFF, sizeof(ss_err));
 
   //  Make a copy of the unfiltered / processed recon buffer
   vpx_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
 
-  best_err = try_filter_frame(sd, cpi, xd, cm, filt_mid, partial_frame);
+  best_err = try_filter_frame(sd, cpi, filt_mid, partial_frame);
   filt_best = filt_mid;
   ss_err[filt_mid] = best_err;
 
   while (filter_step > 0) {
     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;
 
     // yx, bias less for large block size
     if (cm->tx_mode != ONLY_4X4)
       bias >>= 1;
 
     if (filt_direction <= 0 && filt_low != filt_mid) {
       // Get Low filter error score
       if (ss_err[filt_low] < 0) {
-        filt_err = try_filter_frame(sd, cpi, xd, cm, filt_low, partial_frame);
+        filt_err = try_filter_frame(sd, cpi, 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) {
         // Was it actually better than the previous best?
         if (filt_err < best_err)
           best_err = filt_err;
 
         filt_best = filt_low;
       }
     }
 
     // Now look at filt_high
     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);
+        filt_err = try_filter_frame(sd, cpi, 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)) {
         best_err = filt_err;
         filt_best = filt_high;
       }
     }
 
     // Half the step distance if the best filter value was the same as last time
     if (filt_best == filt_mid) {
-      filter_step = filter_step / 2;
+      filter_step /= 2;
       filt_direction = 0;
     } else {
       filt_direction = (filt_best < filt_mid) ? -1 : 1;
       filt_mid = filt_best;
     }
   }
 
   lf->filter_level = filt_best;
 }
 
 void vp9_pick_filter_level(const YV12_BUFFER_CONFIG *sd, VP9_COMP *cpi,
-                           int method) {
+                           LPF_PICK_METHOD 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);
+  if (method == LPF_PICK_FROM_Q) {
+    const int min_filter_level = 0;
+    const int max_filter_level = get_max_filter_level(cpi);
     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;
+    // searched level, filt_guess = q * 0.316206 + 3.87252
+    int filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 1015158, 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);
+    search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE);
   }
 }