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vpx/vp9/encoder/vp9_quantize.c

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/*
* 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;
}
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,
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;
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;
}
}
}
}
*eob_ptr = eob + 1;
}
void vp9_quantize(MACROBLOCK *mb, int plane, int block, int n_coeffs,
TX_TYPE tx_type) {
MACROBLOCKD *const xd = &mb->e_mbd;
const int mul = n_coeffs == 1024 ? 2 : 1;
const int *scan;
// These contexts may be available in the caller
switch (n_coeffs) {
case 4 * 4:
scan = get_scan_4x4(tx_type);
break;
case 8 * 8:
scan = get_scan_8x8(tx_type);
break;
case 16 * 16:
scan = get_scan_16x16(tx_type);
break;
default:
scan = vp9_default_zig_zag1d_32x32;
break;
}
quantize(mb->plane[plane].zrun_zbin_boost,
BLOCK_OFFSET(mb->plane[plane].coeff, block, 16),
n_coeffs, mb->skip_block,
mb->plane[plane].zbin,
mb->plane[plane].round,
mb->plane[plane].quant,
mb->plane[plane].quant_shift,
BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16),
BLOCK_OFFSET(xd->plane[plane].dqcoeff, block, 16),
xd->plane[plane].dequant,
mb->plane[plane].zbin_extra,
&xd->plane[plane].eobs[block],
scan, mul);
}
void vp9_regular_quantize_b_4x4(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 *pt_scan = get_scan_4x4(tx_type);
quantize(mb->plane[pb_idx.plane].zrun_zbin_boost,
BLOCK_OFFSET(mb->plane[pb_idx.plane].coeff, pb_idx.block, 16),
16, mb->skip_block,
mb->plane[pb_idx.plane].zbin,
mb->plane[pb_idx.plane].round,
mb->plane[pb_idx.plane].quant,
mb->plane[pb_idx.plane].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),
xd->plane[pb_idx.plane].dequant,
mb->plane[pb_idx.plane].zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
pt_scan, 1);
}
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 *pt_scan = get_scan_8x8(tx_type);
quantize(mb->plane[pb_idx.plane].zrun_zbin_boost,
BLOCK_OFFSET(mb->plane[pb_idx.plane].coeff, pb_idx.block, 16),
64, mb->skip_block,
mb->plane[pb_idx.plane].zbin,
mb->plane[pb_idx.plane].round,
mb->plane[pb_idx.plane].quant,
mb->plane[pb_idx.plane].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),
xd->plane[pb_idx.plane].dequant,
mb->plane[pb_idx.plane].zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
pt_scan, 1);
}
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 *pt_scan = get_scan_16x16(tx_type);
quantize(mb->plane[pb_idx.plane].zrun_zbin_boost,
BLOCK_OFFSET(mb->plane[pb_idx.plane].coeff, pb_idx.block, 16),
256, mb->skip_block,
mb->plane[pb_idx.plane].zbin,
mb->plane[pb_idx.plane].round,
mb->plane[pb_idx.plane].quant,
mb->plane[pb_idx.plane].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),
xd->plane[pb_idx.plane].dequant,
mb->plane[pb_idx.plane].zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
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);
quantize(mb->plane[pb_idx.plane].zrun_zbin_boost,
BLOCK_OFFSET(mb->plane[pb_idx.plane].coeff, pb_idx.block, 16),
1024, mb->skip_block,
mb->plane[pb_idx.plane].zbin,
mb->plane[pb_idx.plane].round,
mb->plane[pb_idx.plane].quant,
mb->plane[pb_idx.plane].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),
xd->plane[pb_idx.plane].dequant,
mb->plane[pb_idx.plane].zbin_extra,
&xd->plane[pb_idx.plane].eobs[pb_idx.block],
vp9_default_zig_zag1d_32x32, 2);
}
void vp9_quantize_sby_32x32(MACROBLOCK *x, BLOCK_SIZE_TYPE bsize) {
const int bw = 1 << (b_width_log2(bsize) - 3);
const int bh = 1 << (b_height_log2(bsize) - 3);
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 = b_width_log2(bsize) - 2, bw = 1 << bwl;
const int bh = 1 << (b_height_log2(bsize) - 2);
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 = b_width_log2(bsize) - 1, bw = 1 << bwl;
const int bh = 1 << (b_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 = b_width_log2(bsize), bw = 1 << bwl;
const int bh = 1 << b_height_log2(bsize);
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);
x->quantize_b_4x4(x, n, tx_type, 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 = b_width_log2(bsize) - 2;
const int bhl = b_height_log2(bsize) - 2;
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 = b_width_log2(bsize) - 1;
const int bhl = b_height_log2(bsize) - 1;
const int uoff = 4 << (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 = b_width_log2(bsize);
const int bhl = b_height_log2(bsize);
const int uoff = 1 << (bhl + bwl);
int i;
for (i = uoff; i < ((uoff * 3) >> 1); i++)
x->quantize_b_4x4(x, i, DCT_DCT, 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, DCT_DCT, y_blocks);
vp9_regular_quantize_b_4x4(x, b_idx2, DCT_DCT, 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 quant_uv_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.y_dc_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_quant(q, cpi->common.uv_dc_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;
quant_val = vp9_ac_quant(q, 0);
cpi->common.y_dequant[q][1] = quant_val;
quant_uv_val = vp9_ac_quant(q, cpi->common.uv_ac_delta_q);
cpi->common.uv_dequant[q][1] = quant_uv_val;
// all the 4x4 ac values =;
for (i = 1; i < 16; i++) {
int rc = vp9_default_zig_zag1d_4x4[i];
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->zrun_zbin_boost_y1[q][i] =
ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
invert_quant(cpi->UVquant[q] + rc, cpi->UVquant_shift[q] + rc,
quant_uv_val);
cpi->UVzbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_uv_val, 7);
cpi->UVround[q][rc] = (qrounding_factor * quant_uv_val) >> 7;
cpi->zrun_zbin_boost_uv[q][i] =
ROUND_POWER_OF_TWO(quant_uv_val * zbin_boost[i], 7);
}
}
}
void vp9_mb_init_quantizer(VP9_COMP *cpi, MACROBLOCK *x) {
int i;
MACROBLOCKD *xd = &x->e_mbd;
int zbin_extra;
int segment_id = xd->mode_info_context->mbmi.segment_id;
const int qindex = vp9_get_qindex(xd, segment_id, cpi->common.base_qindex);
// Y
zbin_extra = (cpi->common.y_dequant[qindex][1] *
(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
x->plane[0].quant = cpi->Y1quant[qindex];
x->plane[0].quant_shift = cpi->Y1quant_shift[qindex];
x->plane[0].zbin = cpi->Y1zbin[qindex];
x->plane[0].round = cpi->Y1round[qindex];
x->plane[0].zrun_zbin_boost = cpi->zrun_zbin_boost_y1[qindex];
x->plane[0].zbin_extra = (int16_t)zbin_extra;
x->e_mbd.plane[0].dequant = cpi->common.y_dequant[qindex];
// UV
zbin_extra = (cpi->common.uv_dequant[qindex][1] *
(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
for (i = 1; i < 3; i++) {
x->plane[i].quant = cpi->UVquant[qindex];
x->plane[i].quant_shift = cpi->UVquant_shift[qindex];
x->plane[i].zbin = cpi->UVzbin[qindex];
x->plane[i].round = cpi->UVround[qindex];
x->plane[i].zrun_zbin_boost = cpi->zrun_zbin_boost_uv[qindex];
x->plane[i].zbin_extra = (int16_t)zbin_extra;
x->e_mbd.plane[i].dequant = cpi->common.uv_dequant[qindex];
}
x->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) {
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;
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);
}
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->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);
}
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