433 lines
15 KiB
C
433 lines
15 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include "vpx_mem/vpx_mem.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/encoder/vp9_encoder.h"
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#include "vp9/encoder/vp9_quantize.h"
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#include "vp9/encoder/vp9_rd.h"
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void vp9_quantize_dc(const int16_t *coeff_ptr, int skip_block,
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const int16_t *round_ptr, const int16_t quant,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t dequant_ptr, uint16_t *eob_ptr) {
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int eob = -1;
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if (!skip_block) {
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const int rc = 0;
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
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tmp = (tmp * quant) >> 16;
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr;
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if (tmp)
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eob = 0;
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}
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*eob_ptr = eob + 1;
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}
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void vp9_quantize_dc_32x32(const int16_t *coeff_ptr, int skip_block,
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const int16_t *round_ptr, const int16_t quant,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t dequant_ptr, uint16_t *eob_ptr) {
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int eob = -1;
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if (!skip_block) {
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const int rc = 0;
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
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tmp = (tmp * quant) >> 15;
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr / 2;
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if (tmp)
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eob = 0;
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}
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*eob_ptr = eob + 1;
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}
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void vp9_quantize_fp_c(const int16_t *coeff_ptr, intptr_t count,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr, const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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int i, eob = -1;
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// TODO(jingning) Decide the need of these arguments after the
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// quantization process is completed.
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(void)zbin_ptr;
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(void)quant_shift_ptr;
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(void)zbin_oq_value;
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(void)iscan;
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vpx_memset(qcoeff_ptr, 0, count * sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, count * sizeof(int16_t));
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if (!skip_block) {
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// Quantization pass: All coefficients with index >= zero_flag are
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// skippable. Note: zero_flag can be zero.
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for (i = 0; i < count; i++) {
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const int rc = scan[i];
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
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tmp = (tmp * quant_ptr[rc != 0]) >> 16;
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
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if (tmp)
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eob = i;
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}
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}
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*eob_ptr = eob + 1;
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}
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// TODO(jingning) Refactor this file and combine functions with similar
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// operations.
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void vp9_quantize_fp_32x32_c(const int16_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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int i, eob = -1;
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(void)zbin_ptr;
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(void)quant_shift_ptr;
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(void)zbin_oq_value;
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(void)iscan;
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vpx_memset(qcoeff_ptr, 0, n_coeffs * sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, n_coeffs * sizeof(int16_t));
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if (!skip_block) {
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for (i = 0; i < n_coeffs; i++) {
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const int rc = scan[i];
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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int tmp = 0;
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int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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if (abs_coeff >= (dequant_ptr[rc != 0] >> 2)) {
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abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
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abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
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tmp = (abs_coeff * quant_ptr[rc != 0]) >> 15;
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
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}
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if (tmp)
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eob = i;
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}
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}
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*eob_ptr = eob + 1;
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}
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void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t count,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr, const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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int i, non_zero_count = (int)count, eob = -1;
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const int zbins[2] = { zbin_ptr[0] + zbin_oq_value,
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zbin_ptr[1] + zbin_oq_value };
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const int nzbins[2] = { zbins[0] * -1,
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zbins[1] * -1 };
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(void)iscan;
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vpx_memset(qcoeff_ptr, 0, count * sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, count * sizeof(int16_t));
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if (!skip_block) {
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// Pre-scan pass
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for (i = (int)count - 1; i >= 0; i--) {
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const int rc = scan[i];
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const int coeff = coeff_ptr[rc];
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if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
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non_zero_count--;
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else
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break;
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}
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// Quantization pass: All coefficients with index >= zero_flag are
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// skippable. Note: zero_flag can be zero.
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for (i = 0; i < non_zero_count; i++) {
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const int rc = scan[i];
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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if (abs_coeff >= zbins[rc != 0]) {
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int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
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tmp = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
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quant_shift_ptr[rc != 0]) >> 16; // quantization
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
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if (tmp)
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eob = i;
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}
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}
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}
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*eob_ptr = eob + 1;
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}
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void vp9_quantize_b_32x32_c(const int16_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0] + zbin_oq_value, 1),
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ROUND_POWER_OF_TWO(zbin_ptr[1] + zbin_oq_value, 1) };
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const int nzbins[2] = {zbins[0] * -1, zbins[1] * -1};
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int idx = 0;
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int idx_arr[1024];
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int i, eob = -1;
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(void)iscan;
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vpx_memset(qcoeff_ptr, 0, n_coeffs * sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, n_coeffs * sizeof(int16_t));
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if (!skip_block) {
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// Pre-scan pass
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for (i = 0; i < n_coeffs; i++) {
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const int rc = scan[i];
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const int coeff = coeff_ptr[rc];
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// If the coefficient is out of the base ZBIN range, keep it for
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// quantization.
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if (coeff >= zbins[rc != 0] || coeff <= nzbins[rc != 0])
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idx_arr[idx++] = i;
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}
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// Quantization pass: only process the coefficients selected in
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// pre-scan pass. Note: idx can be zero.
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for (i = 0; i < idx; i++) {
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const int rc = scan[idx_arr[i]];
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const int coeff = coeff_ptr[rc];
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const int coeff_sign = (coeff >> 31);
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int tmp;
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int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
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abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
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tmp = ((((abs_coeff * quant_ptr[rc != 0]) >> 16) + abs_coeff) *
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quant_shift_ptr[rc != 0]) >> 15;
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qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
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dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
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if (tmp)
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eob = idx_arr[i];
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}
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}
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*eob_ptr = eob + 1;
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}
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void vp9_regular_quantize_b_4x4(MACROBLOCK *x, int plane, int block,
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const int16_t *scan, const int16_t *iscan) {
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MACROBLOCKD *const xd = &x->e_mbd;
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struct macroblock_plane *p = &x->plane[plane];
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struct macroblockd_plane *pd = &xd->plane[plane];
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vp9_quantize_b(BLOCK_OFFSET(p->coeff, block),
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16, x->skip_block,
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p->zbin, p->round, p->quant, p->quant_shift,
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BLOCK_OFFSET(p->qcoeff, block),
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BLOCK_OFFSET(pd->dqcoeff, block),
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pd->dequant, p->zbin_extra, &p->eobs[block], scan, iscan);
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}
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static void invert_quant(int16_t *quant, int16_t *shift, int d) {
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unsigned t;
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int l;
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t = d;
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for (l = 0; t > 1; l++)
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t >>= 1;
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t = 1 + (1 << (16 + l)) / d;
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*quant = (int16_t)(t - (1 << 16));
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*shift = 1 << (16 - l);
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}
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void vp9_init_quantizer(VP9_COMP *cpi) {
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VP9_COMMON *const cm = &cpi->common;
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QUANTS *const quants = &cpi->quants;
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int i, q, quant;
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for (q = 0; q < QINDEX_RANGE; q++) {
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const int qzbin_factor = q == 0 ? 64 : (vp9_dc_quant(q, 0) < 148 ? 84 : 80);
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const int qrounding_factor = q == 0 ? 64 : 48;
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for (i = 0; i < 2; ++i) {
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int qrounding_factor_fp = i == 0 ? 48 : 42;
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if (q == 0)
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qrounding_factor_fp = 64;
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// y
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quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q)
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: vp9_ac_quant(q, 0);
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invert_quant(&quants->y_quant[q][i], &quants->y_quant_shift[q][i], quant);
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quants->y_quant_fp[q][i] = (1 << 16) / quant;
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quants->y_round_fp[q][i] = (qrounding_factor_fp * quant) >> 7;
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quants->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
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quants->y_round[q][i] = (qrounding_factor * quant) >> 7;
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cm->y_dequant[q][i] = quant;
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// uv
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quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q)
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: vp9_ac_quant(q, cm->uv_ac_delta_q);
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invert_quant(&quants->uv_quant[q][i],
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&quants->uv_quant_shift[q][i], quant);
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quants->uv_quant_fp[q][i] = (1 << 16) / quant;
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quants->uv_round_fp[q][i] = (qrounding_factor_fp * quant) >> 7;
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quants->uv_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
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quants->uv_round[q][i] = (qrounding_factor * quant) >> 7;
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cm->uv_dequant[q][i] = quant;
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}
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for (i = 2; i < 8; i++) {
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quants->y_quant[q][i] = quants->y_quant[q][1];
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quants->y_quant_fp[q][i] = quants->y_quant_fp[q][1];
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quants->y_round_fp[q][i] = quants->y_round_fp[q][1];
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quants->y_quant_shift[q][i] = quants->y_quant_shift[q][1];
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quants->y_zbin[q][i] = quants->y_zbin[q][1];
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quants->y_round[q][i] = quants->y_round[q][1];
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cm->y_dequant[q][i] = cm->y_dequant[q][1];
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quants->uv_quant[q][i] = quants->uv_quant[q][1];
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quants->uv_quant_fp[q][i] = quants->uv_quant_fp[q][1];
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quants->uv_round_fp[q][i] = quants->uv_round_fp[q][1];
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quants->uv_quant_shift[q][i] = quants->uv_quant_shift[q][1];
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quants->uv_zbin[q][i] = quants->uv_zbin[q][1];
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quants->uv_round[q][i] = quants->uv_round[q][1];
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cm->uv_dequant[q][i] = cm->uv_dequant[q][1];
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}
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}
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}
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void vp9_init_plane_quantizers(VP9_COMP *cpi, MACROBLOCK *x) {
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const VP9_COMMON *const cm = &cpi->common;
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MACROBLOCKD *const xd = &x->e_mbd;
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QUANTS *const quants = &cpi->quants;
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const int segment_id = xd->mi[0]->mbmi.segment_id;
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const int qindex = vp9_get_qindex(&cm->seg, segment_id, cm->base_qindex);
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const int rdmult = vp9_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q);
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const int zbin = cpi->zbin_mode_boost;
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int i;
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// Y
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x->plane[0].quant = quants->y_quant[qindex];
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x->plane[0].quant_fp = quants->y_quant_fp[qindex];
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x->plane[0].round_fp = quants->y_round_fp[qindex];
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x->plane[0].quant_shift = quants->y_quant_shift[qindex];
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x->plane[0].zbin = quants->y_zbin[qindex];
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x->plane[0].round = quants->y_round[qindex];
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x->plane[0].zbin_extra = (int16_t)((cm->y_dequant[qindex][1] * zbin) >> 7);
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xd->plane[0].dequant = cm->y_dequant[qindex];
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// UV
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for (i = 1; i < 3; i++) {
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x->plane[i].quant = quants->uv_quant[qindex];
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x->plane[i].quant_fp = quants->uv_quant_fp[qindex];
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x->plane[i].round_fp = quants->uv_round_fp[qindex];
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x->plane[i].quant_shift = quants->uv_quant_shift[qindex];
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x->plane[i].zbin = quants->uv_zbin[qindex];
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x->plane[i].round = quants->uv_round[qindex];
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x->plane[i].zbin_extra = (int16_t)((cm->uv_dequant[qindex][1] * zbin) >> 7);
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xd->plane[i].dequant = cm->uv_dequant[qindex];
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}
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x->skip_block = vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP);
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x->q_index = qindex;
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x->errorperbit = rdmult >> 6;
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x->errorperbit += (x->errorperbit == 0);
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vp9_initialize_me_consts(cpi, x->q_index);
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}
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void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) {
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const int qindex = x->q_index;
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const int y_zbin_extra = (cpi->common.y_dequant[qindex][1] *
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cpi->zbin_mode_boost) >> 7;
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const int uv_zbin_extra = (cpi->common.uv_dequant[qindex][1] *
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cpi->zbin_mode_boost) >> 7;
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x->plane[0].zbin_extra = (int16_t)y_zbin_extra;
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x->plane[1].zbin_extra = (int16_t)uv_zbin_extra;
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x->plane[2].zbin_extra = (int16_t)uv_zbin_extra;
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}
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void vp9_frame_init_quantizer(VP9_COMP *cpi) {
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cpi->zbin_mode_boost = 0;
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vp9_init_plane_quantizers(cpi, &cpi->mb);
|
|
}
|
|
|
|
void vp9_set_quantizer(VP9_COMMON *cm, int q) {
|
|
// quantizer has to be reinitialized with vp9_init_quantizer() if any
|
|
// delta_q changes.
|
|
cm->base_qindex = q;
|
|
cm->y_dc_delta_q = 0;
|
|
cm->uv_dc_delta_q = 0;
|
|
cm->uv_ac_delta_q = 0;
|
|
}
|
|
|
|
// Table that converts 0-63 Q-range values passed in outside to the Qindex
|
|
// range used internally.
|
|
static const int quantizer_to_qindex[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 48, 52, 56, 60,
|
|
64, 68, 72, 76, 80, 84, 88, 92,
|
|
96, 100, 104, 108, 112, 116, 120, 124,
|
|
128, 132, 136, 140, 144, 148, 152, 156,
|
|
160, 164, 168, 172, 176, 180, 184, 188,
|
|
192, 196, 200, 204, 208, 212, 216, 220,
|
|
224, 228, 232, 236, 240, 244, 249, 255,
|
|
};
|
|
|
|
int vp9_quantizer_to_qindex(int quantizer) {
|
|
return quantizer_to_qindex[quantizer];
|
|
}
|
|
|
|
int vp9_qindex_to_quantizer(int qindex) {
|
|
int quantizer;
|
|
|
|
for (quantizer = 0; quantizer < 64; ++quantizer)
|
|
if (quantizer_to_qindex[quantizer] >= qindex)
|
|
return quantizer;
|
|
|
|
return 63;
|
|
}
|