/*
 *  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 "onyx_int.h"
#include "quantize.h"
#include "vp8/common/quant_common.h"

#include "vp8/common/seg_common.h"

#ifdef ENC_DEBUG
extern int enc_debug;
#endif

#if CONFIG_HYBRIDTRANSFORM
void vp8_ht_quantize_b(BLOCK *b, BLOCKD *d) {
  int i, rc, eob;
  int zbin;
  int x, y, z, sz;
  short *zbin_boost_ptr  = b->zrun_zbin_boost;
  short *coeff_ptr       = b->coeff;
  short *zbin_ptr        = b->zbin;
  short *round_ptr       = b->round;
  short *quant_ptr       = b->quant;
  unsigned char *quant_shift_ptr = b->quant_shift;
  short *qcoeff_ptr      = d->qcoeff;
  short *dqcoeff_ptr     = d->dqcoeff;
  short *dequant_ptr     = d->dequant;
  short zbin_oq_value    = b->zbin_extra;

  int const *pt_scan ;

  switch(d->bmi.as_mode.tx_type) {
    case ADST_DCT :
      pt_scan = vp8_row_scan;
      break;

    case DCT_ADST :
      pt_scan = vp8_col_scan;
      break;

    default :
      pt_scan = vp8_default_zig_zag1d;
      break;
  }

  vpx_memset(qcoeff_ptr, 0, 32);
  vpx_memset(dqcoeff_ptr, 0, 32);

  eob = -1;

  for (i = 0; i < b->eob_max_offset; i++) {
    rc   = pt_scan[i];
    z    = coeff_ptr[rc];

    zbin = zbin_ptr[rc] + *zbin_boost_ptr + zbin_oq_value;
    zbin_boost_ptr ++;

    sz = (z >> 31);                                 // sign of z
    x  = (z ^ sz) - sz;                             // x = abs(z)

    if (x >= zbin) {
      x += round_ptr[rc];
      y  = (((x * quant_ptr[rc]) >> 16) + x)
           >> quant_shift_ptr[rc];                // quantize (x)
      x  = (y ^ sz) - sz;                         // get the sign back
      qcoeff_ptr[rc]  = x;                        // write to destination
      dqcoeff_ptr[rc] = x * dequant_ptr[rc];      // dequantized value

      if (y) {
        eob = i;                                // last nonzero coeffs
        zbin_boost_ptr = b->zrun_zbin_boost;    // reset zero runlength
      }
    }
  }

  d->eob = eob + 1;
}
#endif

void vp8_regular_quantize_b(BLOCK *b, BLOCKD *d) {
  int i, rc, eob;
  int zbin;
  int x, y, z, sz;
  short *zbin_boost_ptr  = b->zrun_zbin_boost;
  short *coeff_ptr       = b->coeff;
  short *zbin_ptr        = b->zbin;
  short *round_ptr       = b->round;
  short *quant_ptr       = b->quant;
  unsigned char *quant_shift_ptr = b->quant_shift;
  short *qcoeff_ptr      = d->qcoeff;
  short *dqcoeff_ptr     = d->dqcoeff;
  short *dequant_ptr     = d->dequant;
  short zbin_oq_value    = b->zbin_extra;

  vpx_memset(qcoeff_ptr, 0, 32);
  vpx_memset(dqcoeff_ptr, 0, 32);

  eob = -1;

  for (i = 0; i < b->eob_max_offset; i++) {
    rc   = vp8_default_zig_zag1d[i];
    z    = coeff_ptr[rc];

    zbin = zbin_ptr[rc] + *zbin_boost_ptr + zbin_oq_value;
    zbin_boost_ptr ++;

    sz = (z >> 31);                                 // sign of z
    x  = (z ^ sz) - sz;                             // x = abs(z)

    if (x >= zbin) {
      x += round_ptr[rc];

      y  = (((x * quant_ptr[rc]) >> 16) + x)
           >> quant_shift_ptr[rc];                // quantize (x)
      x  = (y ^ sz) - sz;                         // get the sign back
      qcoeff_ptr[rc]  = x;                        // write to destination
      dqcoeff_ptr[rc] = x * dequant_ptr[rc];      // dequantized value

      if (y) {
        eob = i;                                // last nonzero coeffs
        zbin_boost_ptr = b->zrun_zbin_boost;    // reset zero runlength
      }
    }
  }

  d->eob = eob + 1;
}

void vp8_quantize_mby_c(MACROBLOCK *x) {
  int i;
  int has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != I8X8_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);

  for (i = 0; i < 16; i++)
    x->quantize_b(&x->block[i], &x->e_mbd.block[i]);

  if (has_2nd_order)
    x->quantize_b(&x->block[24], &x->e_mbd.block[24]);
}

void vp8_quantize_mb_c(MACROBLOCK *x) {
  int i;
  int has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != I8X8_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);

  for (i = 0; i < 24 + has_2nd_order; i++)
    x->quantize_b(&x->block[i], &x->e_mbd.block[i]);
}


void vp8_quantize_mbuv_c(MACROBLOCK *x) {
  int i;

  for (i = 16; i < 24; i++)
    x->quantize_b(&x->block[i], &x->e_mbd.block[i]);
}




void vp8_regular_quantize_b_2x2(BLOCK *b, BLOCKD *d) {
  int i, rc, eob;
  int zbin;
  int x, y, z, sz;
  short *zbin_boost_ptr = b->zrun_zbin_boost;
  int zbin_zrun_index = 0;
  short *coeff_ptr  = b->coeff;
  short *zbin_ptr   = b->zbin;
  short *round_ptr  = b->round;
  short *quant_ptr  = b->quant;
  unsigned char *quant_shift_ptr = b->quant_shift;
  short *qcoeff_ptr = d->qcoeff;
  short *dqcoeff_ptr = d->dqcoeff;
  short *dequant_ptr = d->dequant;
  short zbin_oq_value = b->zbin_extra;
  // double q2nd = 4;
  vpx_memset(qcoeff_ptr, 0, 32);
  vpx_memset(dqcoeff_ptr, 0, 32);

  eob = -1;

  for (i = 0; i < b->eob_max_offset_8x8; i++) {
    rc   = vp8_default_zig_zag1d[i];
    z    = coeff_ptr[rc];

    zbin_boost_ptr = &b->zrun_zbin_boost[zbin_zrun_index];
    zbin_zrun_index += 4;
    zbin = (zbin_ptr[rc] + *zbin_boost_ptr + zbin_oq_value);

    sz = (z >> 31);                               // sign of z
    x  = (z ^ sz) - sz;                           // x = abs(z)

    if (x >= zbin) {
      x += (round_ptr[rc]);
      y  = ((int)((int)(x * quant_ptr[rc]) >> 16) + x)
           >> quant_shift_ptr[rc];                // quantize (x)
      x  = (y ^ sz) - sz;                         // get the sign back
      qcoeff_ptr[rc]  = x;                        // write to destination
      dqcoeff_ptr[rc] = x * dequant_ptr[rc];      // dequantized value

      if (y) {
        eob = i;                                  // last nonzero coeffs
        zbin_zrun_index = 0;
      }
    }
  }

  d->eob = eob + 1;
}

void vp8_regular_quantize_b_8x8(BLOCK *b, BLOCKD *d) {
  int i, rc, eob;
  int zbin;
  int x, y, z, sz;
  short *zbin_boost_ptr = b->zrun_zbin_boost_8x8;
  short *coeff_ptr  = b->coeff;
  short *zbin_ptr   = b->zbin_8x8;
  short *round_ptr  = b->round;
  short *quant_ptr  = b->quant;
  unsigned char *quant_shift_ptr = b->quant_shift;
  short *qcoeff_ptr = d->qcoeff;
  short *dqcoeff_ptr = d->dqcoeff;
  short *dequant_ptr = d->dequant;
  short zbin_oq_value = b->zbin_extra;

  vpx_memset(qcoeff_ptr, 0, 64 * sizeof(short));
  vpx_memset(dqcoeff_ptr, 0, 64 * sizeof(short));

  eob = -1;

  for (i = 0; i < b->eob_max_offset_8x8; i++) {
    rc   = vp8_default_zig_zag1d_8x8[i];
    z    = coeff_ptr[rc];

    zbin = (zbin_ptr[rc != 0] + *zbin_boost_ptr + zbin_oq_value);
    zbin_boost_ptr++;

    sz = (z >> 31);                               // sign of z
    x  = (z ^ sz) - sz;                           // x = abs(z)

    if (x >= zbin) {
      x += (round_ptr[rc != 0]);
      y  = ((int)(((int)(x * quant_ptr[rc != 0]) >> 16) + x))
           >> quant_shift_ptr[rc != 0];            // quantize (x)
      x  = (y ^ sz) - sz;                         // get the sign back
      qcoeff_ptr[rc]  = x;                        // write to destination
      dqcoeff_ptr[rc] = x * dequant_ptr[rc != 0]; // dequantized value

      if (y) {
        eob = i;                                  // last nonzero coeffs
        zbin_boost_ptr = b->zrun_zbin_boost_8x8;
      }
    }
  }

  d->eob = eob + 1;
}

void vp8_quantize_mby_8x8(MACROBLOCK *x) {
  int i;
  int has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);
  for (i = 0; i < 16; i ++) {
    x->e_mbd.block[i].eob = 0;
  }
  x->e_mbd.block[24].eob = 0;
  for (i = 0; i < 16; i += 4)
    x->quantize_b_8x8(&x->block[i], &x->e_mbd.block[i]);

  if (has_2nd_order)
    x->quantize_b_2x2(&x->block[24], &x->e_mbd.block[24]);

}

void vp8_quantize_mb_8x8(MACROBLOCK *x) {
  int i;
  int has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
                       && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);
  for (i = 0; i < 25; i ++) {
    x->e_mbd.block[i].eob = 0;
  }
  for (i = 0; i < 24; i += 4)
    x->quantize_b_8x8(&x->block[i], &x->e_mbd.block[i]);

  if (has_2nd_order)
    x->quantize_b_2x2(&x->block[24], &x->e_mbd.block[24]);
}

void vp8_quantize_mbuv_8x8(MACROBLOCK *x) {
  int i;

  for (i = 16; i < 24; i ++) {
    x->e_mbd.block[i].eob = 0;
  }
  for (i = 16; i < 24; i += 4)
    x->quantize_b_8x8(&x->block[i], &x->e_mbd.block[i]);
}



/* quantize_b_pair function pointer in MACROBLOCK structure is set to one of
 * these two C functions if corresponding optimized routine is not available.
 * NEON optimized version implements currently the fast quantization for pair
 * of blocks. */
void vp8_regular_quantize_b_pair(BLOCK *b1, BLOCK *b2, BLOCKD *d1, BLOCKD *d2) {
  vp8_regular_quantize_b(b1, d1);
  vp8_regular_quantize_b(b2, d2);
}

static void invert_quant(short *quant,
                         unsigned char *shift, short d) {
  unsigned t;
  int l;
  t = d;
  for (l = 0; t > 1; l++)
    t >>= 1;
  t = 1 + (1 << (16 + l)) / d;
  *quant = (short)(t - (1 << 16));
  *shift = l;
}


void vp8cx_init_quantizer(VP8_COMP *cpi) {
  int i;
  int quant_val;
  int Q;
  int zbin_boost[16] = { 0,  0,  8, 10, 12, 14, 16, 20,
                         24, 28, 32, 36, 40, 44, 44, 44
                       };

  int zbin_boost_8x8[64] = {  0,  0,  0,  8,  8,  8, 10, 12,
                              14, 16, 18, 20, 22, 24, 26, 28,
                              30, 32, 34, 36, 38, 40, 42, 44,
                              46, 48, 48, 48, 48, 48, 48, 48,
                              48, 48, 48, 48, 48, 48, 48, 48,
                              48, 48, 48, 48, 48, 48, 48, 48,
                              48, 48, 48, 48, 48, 48, 48, 48,
                              48, 48, 48, 48, 48, 48, 48, 48
                           };

  int qrounding_factor = 48;


  for (Q = 0; Q < QINDEX_RANGE; Q++) {
    int qzbin_factor = (vp8_dc_quant(Q, 0) < 148) ? 84 : 80;

#if CONFIG_LOSSLESS
    if (cpi->oxcf.lossless) {
      if (Q == 0) {
        qzbin_factor = 64;
        qrounding_factor = 64;
      }
    }
#endif

    // dc values
    quant_val = vp8_dc_quant(Q, cpi->common.y1dc_delta_q);
    invert_quant(cpi->Y1quant[Q] + 0,
                 cpi->Y1quant_shift[Q] + 0, quant_val);
    cpi->Y1zbin[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;
    cpi->Y1zbin_8x8[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;
    cpi->Y1round[Q][0] = (qrounding_factor * quant_val) >> 7;
    cpi->common.Y1dequant[Q][0] = quant_val;
    cpi->zrun_zbin_boost_y1[Q][0] = (quant_val * zbin_boost[0]) >> 7;
    cpi->zrun_zbin_boost_y1_8x8[Q][0] =
      ((quant_val * zbin_boost_8x8[0]) + 64) >> 7;

    quant_val = vp8_dc2quant(Q, cpi->common.y2dc_delta_q);
    invert_quant(cpi->Y2quant[Q] + 0,
                 cpi->Y2quant_shift[Q] + 0, quant_val);
    cpi->Y2zbin[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;
    cpi->Y2zbin_8x8[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;
    cpi->Y2round[Q][0] = (qrounding_factor * quant_val) >> 7;
    cpi->common.Y2dequant[Q][0] = quant_val;
    cpi->zrun_zbin_boost_y2[Q][0] = (quant_val * zbin_boost[0]) >> 7;
    cpi->zrun_zbin_boost_y2_8x8[Q][0] =
      ((quant_val * zbin_boost_8x8[0]) + 64) >> 7;

    quant_val = vp8_dc_uv_quant(Q, cpi->common.uvdc_delta_q);
    invert_quant(cpi->UVquant[Q] + 0,
                 cpi->UVquant_shift[Q] + 0, quant_val);
    cpi->UVzbin[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;;
    cpi->UVzbin_8x8[Q][0] = ((qzbin_factor * quant_val) + 64) >> 7;;
    cpi->UVround[Q][0] = (qrounding_factor * quant_val) >> 7;
    cpi->common.UVdequant[Q][0] = quant_val;
    cpi->zrun_zbin_boost_uv[Q][0] = (quant_val * zbin_boost[0]) >> 7;
    cpi->zrun_zbin_boost_uv_8x8[Q][0] =
      ((quant_val * zbin_boost_8x8[0]) + 64) >> 7;

    // all the 4x4 ac values =;
    for (i = 1; i < 16; i++) {
      int rc = vp8_default_zig_zag1d[i];

      quant_val = vp8_ac_yquant(Q);
      invert_quant(cpi->Y1quant[Q] + rc,
                   cpi->Y1quant_shift[Q] + rc, quant_val);
      cpi->Y1zbin[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->Y1round[Q][rc] = (qrounding_factor * quant_val) >> 7;
      cpi->common.Y1dequant[Q][rc] = quant_val;
      cpi->zrun_zbin_boost_y1[Q][i] =
        ((quant_val * zbin_boost[i]) + 64) >> 7;

      quant_val = vp8_ac2quant(Q, cpi->common.y2ac_delta_q);
      invert_quant(cpi->Y2quant[Q] + rc,
                   cpi->Y2quant_shift[Q] + rc, quant_val);
      cpi->Y2zbin[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->Y2round[Q][rc] = (qrounding_factor * quant_val) >> 7;
      cpi->common.Y2dequant[Q][rc] = quant_val;
      cpi->zrun_zbin_boost_y2[Q][i] =
        ((quant_val * zbin_boost[i]) + 64) >> 7;

      quant_val = vp8_ac_uv_quant(Q, cpi->common.uvac_delta_q);
      invert_quant(cpi->UVquant[Q] + rc,
                   cpi->UVquant_shift[Q] + rc, quant_val);
      cpi->UVzbin[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->UVround[Q][rc] = (qrounding_factor * quant_val) >> 7;
      cpi->common.UVdequant[Q][rc] = quant_val;
      cpi->zrun_zbin_boost_uv[Q][i] =
        ((quant_val * zbin_boost[i]) + 64) >> 7;
    }

    // 8x8 structures... only zbin seperated out for now
    // This needs cleaning up for 8x8 especially if we are to add
    // support for non flat Q matices
    for (i = 1; i < 64; i++) {
      int rc = vp8_default_zig_zag1d_8x8[i];

      quant_val = vp8_ac_yquant(Q);
      cpi->Y1zbin_8x8[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->zrun_zbin_boost_y1_8x8[Q][i] =
        ((quant_val * zbin_boost_8x8[i]) + 64) >> 7;

      quant_val = vp8_ac2quant(Q, cpi->common.y2ac_delta_q);
      cpi->Y2zbin_8x8[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->zrun_zbin_boost_y2_8x8[Q][i] =
        ((quant_val * zbin_boost_8x8[i]) + 64) >> 7;

      quant_val = vp8_ac_uv_quant(Q, cpi->common.uvac_delta_q);
      cpi->UVzbin_8x8[Q][rc] = ((qzbin_factor * quant_val) + 64) >> 7;
      cpi->zrun_zbin_boost_uv_8x8[Q][i] =
        ((quant_val * zbin_boost_8x8[i]) + 64) >> 7;
    }
  }
}

void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x) {
  int i;
  int QIndex;
  MACROBLOCKD *xd = &x->e_mbd;
  int zbin_extra;
  int segment_id = xd->mode_info_context->mbmi.segment_id;

  // Select the baseline MB Q index allowing for any segment level change.
  if (segfeature_active(xd, segment_id, SEG_LVL_ALT_Q)) {
    // Abs Value
    if (xd->mb_segment_abs_delta == SEGMENT_ABSDATA)
      QIndex = get_segdata(xd, segment_id, SEG_LVL_ALT_Q);

    // Delta Value
    else {
      QIndex = cpi->common.base_qindex +
               get_segdata(xd, segment_id, SEG_LVL_ALT_Q);

      // Clamp to valid range
      QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0;
    }
  } else
    QIndex = cpi->common.base_qindex;

  // Y
  zbin_extra = (cpi->common.Y1dequant[QIndex][1] *
                (cpi->zbin_over_quant +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;

  for (i = 0; i < 16; i++) {
    x->block[i].quant = cpi->Y1quant[QIndex];
    x->block[i].quant_shift = cpi->Y1quant_shift[QIndex];
    x->block[i].zbin = cpi->Y1zbin[QIndex];
    x->block[i].zbin_8x8 = cpi->Y1zbin_8x8[QIndex];
    x->block[i].round = cpi->Y1round[QIndex];
    x->e_mbd.block[i].dequant = cpi->common.Y1dequant[QIndex];
    x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_y1[QIndex];
    x->block[i].zrun_zbin_boost_8x8 = cpi->zrun_zbin_boost_y1_8x8[QIndex];
    x->block[i].zbin_extra = (short)zbin_extra;

    // Segment max eob offset feature.
    if (segfeature_active(xd, segment_id, SEG_LVL_EOB)) {
      x->block[i].eob_max_offset =
        get_segdata(xd, segment_id, SEG_LVL_EOB);
      x->block[i].eob_max_offset_8x8 =
        get_segdata(xd, segment_id, SEG_LVL_EOB);
    } else {
      x->block[i].eob_max_offset = 16;
      x->block[i].eob_max_offset_8x8 = 64;
    }
  }

  // UV
  zbin_extra = (cpi->common.UVdequant[QIndex][1] *
                (cpi->zbin_over_quant +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;

  for (i = 16; i < 24; i++) {
    x->block[i].quant = cpi->UVquant[QIndex];
    x->block[i].quant_shift = cpi->UVquant_shift[QIndex];
    x->block[i].zbin = cpi->UVzbin[QIndex];
    x->block[i].zbin_8x8 = cpi->UVzbin_8x8[QIndex];
    x->block[i].round = cpi->UVround[QIndex];
    x->e_mbd.block[i].dequant = cpi->common.UVdequant[QIndex];
    x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_uv[QIndex];
    x->block[i].zrun_zbin_boost_8x8 = cpi->zrun_zbin_boost_uv_8x8[QIndex];

    x->block[i].zbin_extra = (short)zbin_extra;

    // Segment max eob offset feature.
    if (segfeature_active(xd, segment_id, SEG_LVL_EOB)) {
      x->block[i].eob_max_offset =
        get_segdata(xd, segment_id, SEG_LVL_EOB);
      x->block[i].eob_max_offset_8x8 =
        get_segdata(xd, segment_id, SEG_LVL_EOB);
    } else {
      x->block[i].eob_max_offset = 16;
      x->block[i].eob_max_offset_8x8 = 64;
    }
  }

  // Y2
  zbin_extra = (cpi->common.Y2dequant[QIndex][1] *
                ((cpi->zbin_over_quant / 2) +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;

  x->block[24].quant = cpi->Y2quant[QIndex];
  x->block[24].quant_shift = cpi->Y2quant_shift[QIndex];
  x->block[24].zbin = cpi->Y2zbin[QIndex];
  x->block[24].zbin_8x8 = cpi->Y2zbin_8x8[QIndex];
  x->block[24].round = cpi->Y2round[QIndex];
  x->e_mbd.block[24].dequant = cpi->common.Y2dequant[QIndex];
  x->block[24].zrun_zbin_boost = cpi->zrun_zbin_boost_y2[QIndex];
  x->block[24].zrun_zbin_boost_8x8 = cpi->zrun_zbin_boost_y2_8x8[QIndex];
  x->block[24].zbin_extra = (short)zbin_extra;

  // TBD perhaps not use for Y2
  // Segment max eob offset feature.
  if (segfeature_active(xd, segment_id, SEG_LVL_EOB)) {
    x->block[24].eob_max_offset =
      get_segdata(xd, segment_id, SEG_LVL_EOB);
    x->block[24].eob_max_offset_8x8 =
      get_segdata(xd, segment_id, SEG_LVL_EOB);
  } else {
    x->block[24].eob_max_offset = 16;
    x->block[24].eob_max_offset_8x8 = 4;
  }

  /* save this macroblock QIndex for vp8_update_zbin_extra() */
  x->q_index = QIndex;
}


void vp8_update_zbin_extra(VP8_COMP *cpi, MACROBLOCK *x) {
  int i;
  int QIndex = x->q_index;
  int zbin_extra;

  // Y
  zbin_extra = (cpi->common.Y1dequant[QIndex][1] *
                (cpi->zbin_over_quant +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;
  for (i = 0; i < 16; i++) {
    x->block[i].zbin_extra = (short)zbin_extra;
  }

  // UV
  zbin_extra = (cpi->common.UVdequant[QIndex][1] *
                (cpi->zbin_over_quant +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;

  for (i = 16; i < 24; i++) {
    x->block[i].zbin_extra = (short)zbin_extra;
  }

  // Y2
  zbin_extra = (cpi->common.Y2dequant[QIndex][1] *
                ((cpi->zbin_over_quant / 2) +
                 cpi->zbin_mode_boost +
                 x->act_zbin_adj)) >> 7;

  x->block[24].zbin_extra = (short)zbin_extra;
}


void vp8cx_frame_init_quantizer(VP8_COMP *cpi) {
  // Clear Zbin mode boost for default case
  cpi->zbin_mode_boost = 0;

  // MB level quantizer setup
  vp8cx_mb_init_quantizer(cpi, &cpi->mb);
}


void vp8_set_quantizer(struct VP8_COMP *cpi, int Q) {
  VP8_COMMON *cm = &cpi->common;

  cm->base_qindex = Q;

  // if any of the delta_q values are changing update flag will
  // have to be set.
  cm->y1dc_delta_q = 0;
  cm->y2ac_delta_q = 0;
  cm->uvdc_delta_q = 0;
  cm->uvac_delta_q = 0;
  cm->y2dc_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)
  //    vp8cx_init_quantizer(cpi);
}