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/*
* 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);
}
}
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