/* *  Copyright (c) 2010 The VP8 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 "quantize.h"#include "entropy.h"#include "predictdc.h" void vp8_fast_quantize_b_c(BLOCK *b, BLOCKD *d){    int i, rc, eob;    int zbin;    int x, y, z, sz;    short *coeff_ptr  = &b->coeff[0];    short *zbin_ptr   = &b->zbin[0][0];    short *round_ptr  = &b->round[0][0];    short *quant_ptr  = &b->quant[0][0];    short *qcoeff_ptr = d->qcoeff;    short *dqcoeff_ptr = d->dqcoeff;    short *dequant_ptr = &d->dequant[0][0];     vpx_memset(qcoeff_ptr, 0, 32);    vpx_memset(dqcoeff_ptr, 0, 32);     eob = -1;     for (i = 0; i < 16; i++)    {        rc   = vp8_default_zig_zag1d[i];        z    = coeff_ptr[rc];        zbin = zbin_ptr[rc] ;         sz = (z >> 31);                                 // sign of z        x  = (z ^ sz) - sz;                             // x = abs(z)         if (x >= zbin)        {            y  = ((x + round_ptr[rc]) * quant_ptr[rc]) >> 16; // 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            }        }    }    d->eob = eob + 1;} 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[0];    short *coeff_ptr  = &b->coeff[0];    short *zbin_ptr   = &b->zbin[0][0];    short *round_ptr  = &b->round[0][0];    short *quant_ptr  = &b->quant[0][0];    short *qcoeff_ptr = d->qcoeff;    short *dqcoeff_ptr = d->dqcoeff;    short *dequant_ptr = &d->dequant[0][0];    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 < 16; i++)    {        rc   = vp8_default_zig_zag1d[i];        z    = coeff_ptr[rc];         //if ( i == 0 )        //    zbin = zbin_ptr[rc] + *zbin_boost_ptr + zbin_oq_value/2;        //else        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)        {            y  = ((x + round_ptr[rc]) * quant_ptr[rc]) >> 16; // 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[0];    // reset zero runlength            }        }    }     d->eob = eob + 1;} void vp8_quantize_mby(MACROBLOCK *x){    int i;    int has_2nd_order = (x->e_mbd.mbmi.mode != B_PRED        && x->e_mbd.mbmi.mode != SPLITMV);     for (i = 0; i < 16; i++)    {        x->quantize_b(&x->block[i], &x->e_mbd.block[i]);        x->e_mbd.mbmi.mb_skip_coeff &=            (x->e_mbd.block[i].eob <= has_2nd_order);    }     if(has_2nd_order)    {        x->quantize_b(&x->block[24], &x->e_mbd.block[24]);        x->e_mbd.mbmi.mb_skip_coeff &= (!x->e_mbd.block[24].eob);    }} void vp8_quantize_mb(MACROBLOCK *x){    int i;    int has_2nd_order=(x->e_mbd.mbmi.mode != B_PRED        && x->e_mbd.mbmi.mode != SPLITMV);     x->e_mbd.mbmi.mb_skip_coeff = 1;    for (i = 0; i < 24+has_2nd_order; i++)    {        x->quantize_b(&x->block[i], &x->e_mbd.block[i]);        x->e_mbd.mbmi.mb_skip_coeff &=            (x->e_mbd.block[i].eob <= (has_2nd_order && i<16));    }}  void vp8_quantize_mbuv(MACROBLOCK *x){    int i;     for (i = 16; i < 24; i++)    {        x->quantize_b(&x->block[i], &x->e_mbd.block[i]);        x->e_mbd.mbmi.mb_skip_coeff &= (!x->e_mbd.block[i].eob);    }}