ref: 56d01ee0a6cb3c73943db5d07e16554f6ac40fc9
dir: /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/encoder/vp9_onyx_int.h"
#include "vp9/encoder/vp9_quantize.h"
#include "vp9/common/vp9_quant_common.h"
#include "vp9/common/vp9_seg_common.h"
#ifdef ENC_DEBUG
extern int enc_debug;
#endif
static INLINE int plane_idx(int plane) {
return plane == 0 ? 0 :
plane == 1 ? 16 : 20;
}
void vp9_ht_quantize_b_4x4(MACROBLOCK *mb, int b_idx, TX_TYPE tx_type) {
MACROBLOCKD *const xd = &mb->e_mbd;
BLOCK *const b = &mb->block[0];
BLOCKD *const d = &xd->block[0];
int i, rc, eob;
int zbin;
int x, y, z, sz;
int16_t *coeff_ptr = mb->coeff + b_idx * 16;
// ht is luma-only
int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[0].qcoeff, b_idx, 16);
int16_t *dqcoeff_ptr = BLOCK_OFFSET(xd->plane[0].dqcoeff, b_idx, 16);
int16_t *zbin_boost_ptr = b->zrun_zbin_boost;
int16_t *zbin_ptr = b->zbin;
int16_t *round_ptr = b->round;
int16_t *quant_ptr = b->quant;
uint8_t *quant_shift_ptr = b->quant_shift;
int16_t *dequant_ptr = d->dequant;
int zbin_oq_value = b->zbin_extra;
const int *pt_scan;
#if CONFIG_CODE_NONZEROCOUNT
int nzc = 0;
#endif
switch (tx_type) {
case ADST_DCT:
pt_scan = vp9_row_scan_4x4;
break;
case DCT_ADST:
pt_scan = vp9_col_scan_4x4;
break;
default:
pt_scan = vp9_default_zig_zag1d_4x4;
break;
}
vpx_memset(qcoeff_ptr, 0, 32);
vpx_memset(dqcoeff_ptr, 0, 32);
eob = -1;
if (!b->skip_block) {
for (i = 0; i < 16; 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
#if CONFIG_CODE_NONZEROCOUNT
++nzc; // number of nonzero coeffs
#endif
zbin_boost_ptr = b->zrun_zbin_boost; // reset zero runlength
}
}
}
}
xd->plane[0].eobs[b_idx] = eob + 1;
#if CONFIG_CODE_NONZEROCOUNT
xd->nzcs[b_idx] = nzc;
#endif
}
void vp9_regular_quantize_b_4x4(MACROBLOCK *mb, int b_idx, int y_blocks) {
MACROBLOCKD *const xd = &mb->e_mbd;
const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
const int c_idx = plane_idx(pb_idx.plane);
BLOCK *const b = &mb->block[c_idx];
BLOCKD *const d = &xd->block[c_idx];
int i, rc, eob;
int zbin;
int x, y, z, sz;
int16_t *coeff_ptr = mb->coeff + b_idx * 16;
int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff,
pb_idx.block, 16);
int16_t *dqcoeff_ptr = BLOCK_OFFSET(xd->plane[pb_idx.plane].dqcoeff,
pb_idx.block, 16);
int16_t *zbin_boost_ptr = b->zrun_zbin_boost;
int16_t *zbin_ptr = b->zbin;
int16_t *round_ptr = b->round;
int16_t *quant_ptr = b->quant;
uint8_t *quant_shift_ptr = b->quant_shift;
int16_t *dequant_ptr = d->dequant;
int zbin_oq_value = b->zbin_extra;
#if CONFIG_CODE_NONZEROCOUNT
int nzc = 0;
#endif
if (c_idx == 0) assert(pb_idx.plane == 0);
if (c_idx == 16) assert(pb_idx.plane == 1);
if (c_idx == 20) assert(pb_idx.plane == 2);
vpx_memset(qcoeff_ptr, 0, 32);
vpx_memset(dqcoeff_ptr, 0, 32);
eob = -1;
if (!b->skip_block) {
for (i = 0; i < 16; i++) {
rc = vp9_default_zig_zag1d_4x4[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
#if CONFIG_CODE_NONZEROCOUNT
++nzc; // number of nonzero coeffs
#endif
zbin_boost_ptr = b->zrun_zbin_boost; // reset zero runlength
}
}
}
}
xd->plane[pb_idx.plane].eobs[pb_idx.block] = eob + 1;
#if CONFIG_CODE_NONZEROCOUNT
xd->nzcs[b_idx] = nzc;
#endif
}
void vp9_regular_quantize_b_8x8(MACROBLOCK *mb, int b_idx, TX_TYPE tx_type,
int y_blocks) {
MACROBLOCKD *const xd = &mb->e_mbd;
const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
const int c_idx = plane_idx(pb_idx.plane);
int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff,
pb_idx.block, 16);
int16_t *dqcoeff_ptr = BLOCK_OFFSET(xd->plane[pb_idx.plane].dqcoeff,
pb_idx.block, 16);
BLOCK *const b = &mb->block[c_idx];
BLOCKD *const d = &xd->block[c_idx];
const int *pt_scan;
switch (tx_type) {
case ADST_DCT:
pt_scan = vp9_row_scan_8x8;
break;
case DCT_ADST:
pt_scan = vp9_col_scan_8x8;
break;
default:
pt_scan = vp9_default_zig_zag1d_8x8;
break;
}
if (c_idx == 0) assert(pb_idx.plane == 0);
if (c_idx == 16) assert(pb_idx.plane == 1);
if (c_idx == 20) assert(pb_idx.plane == 2);
vpx_memset(qcoeff_ptr, 0, 64 * sizeof(int16_t));
vpx_memset(dqcoeff_ptr, 0, 64 * sizeof(int16_t));
if (!b->skip_block) {
int i, rc, eob;
int zbin;
int x, y, z, sz;
int zero_run;
int16_t *zbin_boost_ptr = b->zrun_zbin_boost;
int16_t *coeff_ptr = mb->coeff + 16 * b_idx;
int16_t *zbin_ptr = b->zbin;
int16_t *round_ptr = b->round;
int16_t *quant_ptr = b->quant;
uint8_t *quant_shift_ptr = b->quant_shift;
int16_t *dequant_ptr = d->dequant;
int zbin_oq_value = b->zbin_extra;
#if CONFIG_CODE_NONZEROCOUNT
int nzc = 0;
#endif
eob = -1;
// Special case for DC as it is the one triggering access in various
// tables: {zbin, quant, quant_shift, dequant}_ptr[rc != 0]
{
z = coeff_ptr[0];
zbin = (zbin_ptr[0] + zbin_boost_ptr[0] + zbin_oq_value);
zero_run = 1;
sz = (z >> 31); // sign of z
x = (z ^ sz) - sz; // x = abs(z)
if (x >= zbin) {
x += (round_ptr[0]);
y = ((int)(((int)(x * quant_ptr[0]) >> 16) + x))
>> quant_shift_ptr[0]; // quantize (x)
x = (y ^ sz) - sz; // get the sign back
qcoeff_ptr[0] = x; // write to destination
dqcoeff_ptr[0] = x * dequant_ptr[0]; // dequantized value
if (y) {
eob = 0; // last nonzero coeffs
#if CONFIG_CODE_NONZEROCOUNT
++nzc; // number of nonzero coeffs
#endif
zero_run = 0;
}
}
}
for (i = 1; i < 64; i++) {
rc = pt_scan[i];
z = coeff_ptr[rc];
zbin = (zbin_ptr[1] + zbin_boost_ptr[zero_run] + zbin_oq_value);
// The original code was incrementing zero_run while keeping it at
// maximum 15 by adding "(zero_run < 15)". The same is achieved by
// removing the opposite of the sign mask of "(zero_run - 15)".
zero_run -= (zero_run - 15) >> 31;
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[1]) >> 16) + x))
>> quant_shift_ptr[1]; // quantize (x)
x = (y ^ sz) - sz; // get the sign back
qcoeff_ptr[rc] = x; // write to destination
dqcoeff_ptr[rc] = x * dequant_ptr[1]; // dequantized value
if (y) {
eob = i; // last nonzero coeffs
#if CONFIG_CODE_NONZEROCOUNT
++nzc; // number of nonzero coeffs
#endif
zero_run = 0;
}
}
}
xd->plane[pb_idx.plane].eobs[pb_idx.block] = eob + 1;
#if CONFIG_CODE_NONZEROCOUNT
xd->nzcs[b_idx] = nzc;
#endif
} else {
xd->plane[pb_idx.plane].eobs[pb_idx.block] = 0;
#if CONFIG_CODE_NONZEROCOUNT
xd->nzcs[b_idx] = 0;
#endif
}
}
static void quantize(int16_t *zbin_boost_orig_ptr,
int16_t *coeff_ptr, int n_coeffs, int skip_block,
int16_t *zbin_ptr, int16_t *round_ptr, int16_t *quant_ptr,
uint8_t *quant_shift_ptr,
int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
int16_t *dequant_ptr, int zbin_oq_value,
uint16_t *eob_ptr,
#if CONFIG_CODE_NONZEROCOUNT
uint16_t *nzc_ptr,
#endif
const int *scan, int mul) {
int i, rc, eob;
int zbin;
int x, y, z, sz;
int zero_run = 0;
int16_t *zbin_boost_ptr = zbin_boost_orig_ptr;
#if CONFIG_CODE_NONZEROCOUNT
int nzc = 0;
#endif
vpx_memset(qcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
vpx_memset(dqcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
eob = -1;
if (!skip_block) {
for (i = 0; i < n_coeffs; i++) {
rc = scan[i];
z = coeff_ptr[rc] * mul;
zbin = (zbin_ptr[rc != 0] + zbin_boost_ptr[zero_run] + zbin_oq_value);
zero_run += (zero_run < 15);
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] / mul; // dequantized value
if (y) {
eob = i; // last nonzero coeffs
zero_run = 0;
#if CONFIG_CODE_NONZEROCOUNT
++nzc; // number of nonzero coeffs
#endif
}
}
}
}
*eob_ptr = eob + 1;
#if CONFIG_CODE_NONZEROCOUNT
*nzc_ptr = nzc;
#endif
}
void vp9_regular_quantize_b_16x16(MACROBLOCK *mb, int b_idx, TX_TYPE tx_type,
int y_blocks) {
MACROBLOCKD *const xd = &mb->e_mbd;
const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
const int c_idx = plane_idx(pb_idx.plane);
BLOCK *const b = &mb->block[c_idx];
BLOCKD *const d = &xd->block[c_idx];
const int *pt_scan;
switch (tx_type) {
case ADST_DCT:
pt_scan = vp9_row_scan_16x16;
break;
case DCT_ADST:
pt_scan = vp9_col_scan_16x16;
break;
default:
pt_scan = vp9_default_zig_zag1d_16x16;
break;
}
if (c_idx == 0) assert(pb_idx.plane == 0);
if (c_idx == 16) assert(pb_idx.plane == 1);
if (c_idx == 20) assert(pb_idx.plane == 2);
quantize(b->zrun_zbin_boost,
mb->coeff + 16 * b_idx,
256, b->skip_block,
b->zbin, b->round, b->quant, b->quant_shift,
BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff, pb_idx.block, 16),
BLOCK_OFFSET(xd->plane[pb_idx.plane].dqcoeff, pb_idx.block, 16),
d->dequant,
b->zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
#if CONFIG_CODE_NONZEROCOUNT
&xd->nzcs[b_idx],
#endif
pt_scan, 1);
}
void vp9_regular_quantize_b_32x32(MACROBLOCK *mb, int b_idx, int y_blocks) {
MACROBLOCKD *const xd = &mb->e_mbd;
const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
const int c_idx = plane_idx(pb_idx.plane);
BLOCK *const b = &mb->block[c_idx];
BLOCKD *const d = &xd->block[c_idx];
if (c_idx == 0) assert(pb_idx.plane == 0);
if (c_idx == 16) assert(pb_idx.plane == 1);
if (c_idx == 20) assert(pb_idx.plane == 2);
quantize(b->zrun_zbin_boost,
mb->coeff + b_idx * 16,
1024, b->skip_block,
b->zbin,
b->round, b->quant, b->quant_shift,
BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff, pb_idx.block, 16),
BLOCK_OFFSET(xd->plane[pb_idx.plane].dqcoeff, pb_idx.block, 16),
d->dequant,
b->zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
#if CONFIG_CODE_NONZEROCOUNT
&xd->nzcs[b_idx],
#endif
vp9_default_zig_zag1d_32x32, 2);
}
void vp9_quantize_sby_32x32(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bw = 1 << (mb_width_log2(bsize) - 1);
const int bh = 1 << (mb_height_log2(bsize) - 1);
int n;
for (n = 0; n < bw * bh; n++)
vp9_regular_quantize_b_32x32(x, n * 64, bw * bh * 64);
}
void vp9_quantize_sby_16x16(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize), bw = 1 << bwl;
const int bh = 1 << mb_height_log2(bsize);
const int bstride = 16 << bwl;
int n;
for (n = 0; n < bw * bh; n++) {
const int x_idx = n & (bw - 1), y_idx = n >> bwl;
TX_TYPE tx_type = get_tx_type_16x16(&x->e_mbd,
4 * x_idx + y_idx * bstride);
x->quantize_b_16x16(x, n * 16, tx_type, 16 * bw * bh);
}
}
void vp9_quantize_sby_8x8(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize) + 1, bw = 1 << bwl;
const int bh = 1 << (mb_height_log2(bsize) + 1);
const int bstride = 4 << bwl;
int n;
for (n = 0; n < bw * bh; n++) {
const int x_idx = n & (bw - 1), y_idx = n >> bwl;
TX_TYPE tx_type = get_tx_type_8x8(&x->e_mbd,
2 * x_idx + y_idx * bstride);
x->quantize_b_8x8(x, n * 4, tx_type, 4 * bw * bh);
}
}
void vp9_quantize_sby_4x4(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize) + 2, bw = 1 << bwl;
const int bh = 1 << (mb_height_log2(bsize) + 2);
MACROBLOCKD *const xd = &x->e_mbd;
int n;
for (n = 0; n < bw * bh; n++) {
const TX_TYPE tx_type = get_tx_type_4x4(xd, n);
if (tx_type != DCT_DCT) {
vp9_ht_quantize_b_4x4(x, n, tx_type);
} else {
x->quantize_b_4x4(x, n, bw * bh);
}
}
}
void vp9_quantize_sbuv_32x32(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
assert(bsize == BLOCK_SIZE_SB64X64);
vp9_regular_quantize_b_32x32(x, 256, 256);
vp9_regular_quantize_b_32x32(x, 320, 256);
}
void vp9_quantize_sbuv_16x16(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize);
const int bhl = mb_width_log2(bsize);
const int uoff = 16 << (bhl + bwl);
int i;
for (i = uoff; i < ((uoff * 3) >> 1); i += 16)
x->quantize_b_16x16(x, i, DCT_DCT, uoff);
}
void vp9_quantize_sbuv_8x8(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize);
const int bhl = mb_width_log2(bsize);
const int uoff = 16 << (bhl + bwl);
int i;
for (i = uoff; i < ((uoff * 3) >> 1); i += 4)
x->quantize_b_8x8(x, i, DCT_DCT, uoff);
}
void vp9_quantize_sbuv_4x4(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bwl = mb_width_log2(bsize);
const int bhl = mb_width_log2(bsize);
const int uoff = 16 << (bhl + bwl);
int i;
for (i = uoff; i < ((uoff * 3) >> 1); i++)
x->quantize_b_4x4(x, i, uoff);
}
/* 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 vp9_regular_quantize_b_4x4_pair(MACROBLOCK *x, int b_idx1, int b_idx2,
int y_blocks) {
vp9_regular_quantize_b_4x4(x, b_idx1, y_blocks);
vp9_regular_quantize_b_4x4(x, b_idx2, y_blocks);
}
static void invert_quant(int16_t *quant, uint8_t *shift, int d) {
unsigned t;
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 = l;
}
void vp9_init_quantizer(VP9_COMP *cpi) {
int i;
int quant_val;
int q;
static const int zbin_boost[16] = { 0, 0, 0, 8, 8, 8, 10, 12,
14, 16, 20, 24, 28, 32, 36, 40 };
for (q = 0; q < QINDEX_RANGE; q++) {
int qzbin_factor = (vp9_dc_quant(q, 0) < 148) ? 84 : 80;
int qrounding_factor = 48;
if (q == 0) {
qzbin_factor = 64;
qrounding_factor = 64;
}
// dc values
quant_val = vp9_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] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
cpi->Y1round[q][0] = (qrounding_factor * quant_val) >> 7;
cpi->common.y_dequant[q][0] = quant_val;
cpi->zrun_zbin_boost_y1[q][0] = (quant_val * zbin_boost[0]) >> 7;
quant_val = vp9_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] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
cpi->UVround[q][0] = (qrounding_factor * quant_val) >> 7;
cpi->common.uv_dequant[q][0] = quant_val;
cpi->zrun_zbin_boost_uv[q][0] = (quant_val * zbin_boost[0]) >> 7;
// all the 4x4 ac values =;
for (i = 1; i < 16; i++) {
int rc = vp9_default_zig_zag1d_4x4[i];
quant_val = vp9_ac_yquant(q);
invert_quant(cpi->Y1quant[q] + rc, cpi->Y1quant_shift[q] + rc, quant_val);
cpi->Y1zbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
cpi->Y1round[q][rc] = (qrounding_factor * quant_val) >> 7;
cpi->common.y_dequant[q][rc] = quant_val;
cpi->zrun_zbin_boost_y1[q][i] =
ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
quant_val = vp9_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] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
cpi->UVround[q][rc] = (qrounding_factor * quant_val) >> 7;
cpi->common.uv_dequant[q][rc] = quant_val;
cpi->zrun_zbin_boost_uv[q][i] =
ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
}
}
}
void vp9_mb_init_quantizer(VP9_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 (vp9_segfeature_active(xd, segment_id, SEG_LVL_ALT_Q)) {
if (xd->mb_segment_abs_delta == SEGMENT_ABSDATA) {
// Abs Value
qindex = vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
} else {
// Delta Value
qindex = cpi->common.base_qindex +
vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
// Clamp to valid range
qindex = clamp(qindex, 0, MAXQ);
}
} else {
qindex = cpi->common.base_qindex;
}
// Y
zbin_extra = (cpi->common.y_dequant[qindex][1] *
(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].round = cpi->Y1round[qindex];
x->e_mbd.block[i].dequant = cpi->common.y_dequant[qindex];
x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_y1[qindex];
x->block[i].zbin_extra = (int16_t)zbin_extra;
// Segment skip feature.
x->block[i].skip_block =
vp9_segfeature_active(xd, segment_id, SEG_LVL_SKIP);
}
// UV
zbin_extra = (cpi->common.uv_dequant[qindex][1] *
(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].round = cpi->UVround[qindex];
x->e_mbd.block[i].dequant = cpi->common.uv_dequant[qindex];
x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_uv[qindex];
x->block[i].zbin_extra = (int16_t)zbin_extra;
// Segment skip feature.
x->block[i].skip_block =
vp9_segfeature_active(xd, segment_id, SEG_LVL_SKIP);
}
/* save this macroblock QIndex for vp9_update_zbin_extra() */
x->e_mbd.q_index = qindex;
}
void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) {
int i;
const int qindex = x->e_mbd.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;
for (i = 0; i < 16; i++)
x->block[i].zbin_extra = (int16_t)y_zbin_extra;
for (i = 16; i < 24; i++)
x->block[i].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);
}
void vp9_set_quantizer(struct VP9_COMP *cpi, int Q) {
VP9_COMMON *cm = &cpi->common;
cm->base_qindex = Q;
// Set lossless mode
if (cm->base_qindex <= 4)
cm->base_qindex = 0;
// if any of the delta_q values are changing update flag will
// have to be set.
cm->y1dc_delta_q = 0;
cm->uvdc_delta_q = 0;
cm->uvac_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);
}