libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_quantize.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 <math.h>
+
 #include "vpx_mem/vpx_mem.h"
 
+#include "vp9/common/vp9_quant_common.h"
+#include "vp9/common/vp9_seg_common.h"
+
 #include "vp9/encoder/vp9_onyx_int.h"
+#include "vp9/encoder/vp9_quantize.h"
 #include "vp9/encoder/vp9_rdopt.h"
-#include "vp9/encoder/vp9_quantize.h"
-#include "vp9/common/vp9_quant_common.h"
-
-#include "vp9/common/vp9_seg_common.h"
 
 void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t count,
                       int skip_block,
                       const int16_t *zbin_ptr, const int16_t *round_ptr,
                       const int16_t *quant_ptr, const int16_t *quant_shift_ptr,
                       int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
                       const int16_t *dequant_ptr,
                       int zbin_oq_value, uint16_t *eob_ptr,
                       const int16_t *scan, const int16_t *iscan) {
-  int i, non_zero_count = count, eob = -1;
+  int i, non_zero_count = (int)count, eob = -1;
   const int zbins[2] = { zbin_ptr[0] + zbin_oq_value,
                          zbin_ptr[1] + zbin_oq_value };
   const int nzbins[2] = { zbins[0] * -1,
                           zbins[1] * -1 };
 
   vpx_memset(qcoeff_ptr, 0, count * sizeof(int16_t));
   vpx_memset(dqcoeff_ptr, 0, count * sizeof(int16_t));
 
   if (!skip_block) {
     // Pre-scan pass
-    for (i = count - 1; i >= 0; i--) {
+    for (i = (int)count - 1; i >= 0; i--) {
       const int rc = scan[i];
       const int coeff = coeff_ptr[rc];
 
       if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
         non_zero_count--;
       else
         break;
     }
 
     // Quantization pass: All coefficients with index >= zero_flag are
@@ skipping 93 matching lines @@
   int l;
   t = d;
   for (l = 0; t > 1; l++)
     t >>= 1;
   t = 1 + (1 << (16 + l)) / d;
   *quant = (int16_t)(t - (1 << 16));
   *shift = 1 << (16 - l);
 }
 
 void vp9_init_quantizer(VP9_COMP *cpi) {
-  int i, q;
   VP9_COMMON *const cm = &cpi->common;
+  int i, q, quant;
 
   for (q = 0; q < QINDEX_RANGE; q++) {
     const int qzbin_factor = q == 0 ? 64 : (vp9_dc_quant(q, 0) < 148 ? 84 : 80);
     const int qrounding_factor = q == 0 ? 64 : 48;
 
-    // y
     for (i = 0; i < 2; ++i) {
-      const int quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q)
-                               : vp9_ac_quant(q, 0);
+      // y
+      quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q)
+                     : vp9_ac_quant(q, 0);
       invert_quant(&cpi->y_quant[q][i], &cpi->y_quant_shift[q][i], quant);
       cpi->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
       cpi->y_round[q][i] = (qrounding_factor * quant) >> 7;
       cm->y_dequant[q][i] = quant;
-    }
 
-    // uv
-    for (i = 0; i < 2; ++i) {
-      const int quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q)
-                               : vp9_ac_quant(q, cm->uv_ac_delta_q);
+      // uv
+      quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q)
+                     : vp9_ac_quant(q, cm->uv_ac_delta_q);
       invert_quant(&cpi->uv_quant[q][i], &cpi->uv_quant_shift[q][i], quant);
       cpi->uv_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
       cpi->uv_round[q][i] = (qrounding_factor * quant) >> 7;
       cm->uv_dequant[q][i] = quant;
-    }
 
 #if CONFIG_ALPHA
-    // alpha
-    for (i = 0; i < 2; ++i) {
-      const int quant = i == 0 ? vp9_dc_quant(q, cm->a_dc_delta_q)
-                               : vp9_ac_quant(q, cm->a_ac_delta_q);
+      // alpha
+      quant = i == 0 ? vp9_dc_quant(q, cm->a_dc_delta_q)
+                     : vp9_ac_quant(q, cm->a_ac_delta_q);
       invert_quant(&cpi->a_quant[q][i], &cpi->a_quant_shift[q][i], quant);
       cpi->a_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
       cpi->a_round[q][i] = (qrounding_factor * quant) >> 7;
       cm->a_dequant[q][i] = quant;
+#endif
     }
-#endif
 
     for (i = 2; i < 8; i++) {
       cpi->y_quant[q][i] = cpi->y_quant[q][1];
       cpi->y_quant_shift[q][i] = cpi->y_quant_shift[q][1];
       cpi->y_zbin[q][i] = cpi->y_zbin[q][1];
       cpi->y_round[q][i] = cpi->y_round[q][1];
       cm->y_dequant[q][i] = cm->y_dequant[q][1];
 
       cpi->uv_quant[q][i] = cpi->uv_quant[q][1];
       cpi->uv_quant_shift[q][i] = cpi->uv_quant_shift[q][1];
       cpi->uv_zbin[q][i] = cpi->uv_zbin[q][1];
       cpi->uv_round[q][i] = cpi->uv_round[q][1];
       cm->uv_dequant[q][i] = cm->uv_dequant[q][1];
 
 #if CONFIG_ALPHA
       cpi->a_quant[q][i] = cpi->a_quant[q][1];
       cpi->a_quant_shift[q][i] = cpi->a_quant_shift[q][1];
       cpi->a_zbin[q][i] = cpi->a_zbin[q][1];
       cpi->a_round[q][i] = cpi->a_round[q][1];
       cm->a_dequant[q][i] = cm->a_dequant[q][1];
 #endif
     }
   }
 }
 
-void vp9_mb_init_quantizer(VP9_COMP *cpi, MACROBLOCK *x) {
+void vp9_init_plane_quantizers(VP9_COMP *cpi, MACROBLOCK *x) {
   const VP9_COMMON *const cm = &cpi->common;
   MACROBLOCKD *xd = &x->e_mbd;
   const int segment_id = xd->mi_8x8[0]->mbmi.segment_id;
   const int qindex = vp9_get_qindex(&cm->seg, segment_id, cm->base_qindex);
   const int rdmult = vp9_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q);
   const int zbin = cpi->zbin_mode_boost + x->act_zbin_adj;
   int i;
 
   // Y
   x->plane[0].quant = cpi->y_quant[qindex];
@@ skipping 11 matching lines @@
     x->plane[i].round = cpi->uv_round[qindex];
     x->plane[i].zbin_extra = (int16_t)((cm->uv_dequant[qindex][1] * zbin) >> 7);
     xd->plane[i].dequant = cm->uv_dequant[qindex];
   }
 
 #if CONFIG_ALPHA
   x->plane[3].quant = cpi->a_quant[qindex];
   x->plane[3].quant_shift = cpi->a_quant_shift[qindex];
   x->plane[3].zbin = cpi->a_zbin[qindex];
   x->plane[3].round = cpi->a_round[qindex];
-  x->plane[3].zbin_extra = (int16_t)zbin_extra;
+  x->plane[3].zbin_extra = (int16_t)((cm->a_dequant[qindex][1] * zbin) >> 7);
   xd->plane[3].dequant = cm->a_dequant[qindex];
 #endif
 
   x->skip_block = vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP);
   x->q_index = qindex;
 
   x->errorperbit = rdmult >> 6;
   x->errorperbit += (x->errorperbit == 0);
 
   vp9_initialize_me_consts(cpi, x->q_index);
 }
 
 void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) {
   const int qindex = x->q_index;
   const int y_zbin_extra = (cpi->common.y_dequant[qindex][1] *
                 (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
   const int uv_zbin_extra = (cpi->common.uv_dequant[qindex][1] *
                   (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
 
   x->plane[0].zbin_extra = (int16_t)y_zbin_extra;
   x->plane[1].zbin_extra = (int16_t)uv_zbin_extra;
   x->plane[2].zbin_extra = (int16_t)uv_zbin_extra;
 }
 
 void vp9_frame_init_quantizer(VP9_COMP *cpi) {
-  // Clear Zbin mode boost for default case
   cpi->zbin_mode_boost = 0;
-
-  // MB level quantizer setup
-  vp9_mb_init_quantizer(cpi, &cpi->mb);
+  vp9_init_plane_quantizers(cpi, &cpi->mb);
 }
 
 void vp9_set_quantizer(struct VP9_COMP *cpi, int q) {
-  VP9_COMMON *cm = &cpi->common;
+  VP9_COMMON *const cm = &cpi->common;
 
+  // quantizer has to be reinitialized with vp9_init_quantizer() if any
+  // delta_q changes.
   cm->base_qindex = q;
-
-  // if any of the delta_q values are changing update flag will
-  // have to be set.
   cm->y_dc_delta_q = 0;
   cm->uv_dc_delta_q = 0;
   cm->uv_ac_delta_q = 0;
-
-  // quantizer has to be reinitialized if any delta_q changes.
-  // As there are not any here for now this is inactive code.
-  // if(update)
-  //    vp9_init_quantizer(cpi);
 }