зеркало из https://github.com/mozilla/gecko-dev.git
212 строки
10 KiB
C
212 строки
10 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include "aom_dsp/quantize.h"
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#include "aom_mem/aom_mem.h"
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void quantize_b_helper_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block, const int16_t *zbin_ptr,
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const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
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tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
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uint16_t *eob_ptr, const int16_t *scan,
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const int16_t *iscan, const qm_val_t *qm_ptr,
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const qm_val_t *iqm_ptr, const int log_scale) {
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const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], log_scale),
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ROUND_POWER_OF_TWO(zbin_ptr[1], log_scale) };
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const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
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int i, non_zero_count = (int)n_coeffs, eob = -1;
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(void)iscan;
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memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
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memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
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if (!skip_block) {
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// Pre-scan pass
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for (i = (int)n_coeffs - 1; i >= 0; i--) {
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const int rc = scan[i];
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const qm_val_t wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS);
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const int coeff = coeff_ptr[rc] * wt;
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if (coeff < (zbins[rc != 0] * (1 << AOM_QM_BITS)) &&
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coeff > (nzbins[rc != 0] * (1 << AOM_QM_BITS)))
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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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int tmp32;
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const qm_val_t wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS);
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if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
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int64_t tmp =
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clamp(abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], log_scale),
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INT16_MIN, INT16_MAX);
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tmp *= wt;
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tmp32 = (int)(((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
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quant_shift_ptr[rc != 0]) >>
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(16 - log_scale + AOM_QM_BITS)); // quantization
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qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
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const int iwt = iqm_ptr != NULL ? iqm_ptr[rc] : (1 << AOM_QM_BITS);
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const int dequant =
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(dequant_ptr[rc != 0] * iwt + (1 << (AOM_QM_BITS - 1))) >>
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AOM_QM_BITS;
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const tran_low_t abs_dqcoeff = (tmp32 * dequant) >> log_scale;
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dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign);
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if (tmp32) 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 highbd_quantize_b_helper_c(
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const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
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tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan, const qm_val_t *qm_ptr,
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const qm_val_t *iqm_ptr, const int log_scale) {
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int i, eob = -1;
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const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], log_scale),
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ROUND_POWER_OF_TWO(zbin_ptr[1], log_scale) };
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const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
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int dequant;
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int idx_arr[4096];
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(void)iscan;
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int idx = 0;
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memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
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memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
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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 qm_val_t wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS);
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const int coeff = coeff_ptr[rc] * wt;
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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] * (1 << AOM_QM_BITS)) ||
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coeff <= (nzbins[rc != 0] * (1 << AOM_QM_BITS)))
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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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const qm_val_t wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS);
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const qm_val_t iwt = iqm_ptr != NULL ? iqm_ptr[rc] : (1 << AOM_QM_BITS);
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const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
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const int64_t tmp1 =
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abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], log_scale);
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const int64_t tmpw = tmp1 * wt;
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const int64_t tmp2 = ((tmpw * quant_ptr[rc != 0]) >> 16) + tmpw;
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const int abs_qcoeff = (int)((tmp2 * quant_shift_ptr[rc != 0]) >>
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(16 - log_scale + AOM_QM_BITS));
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qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
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dequant = (dequant_ptr[rc != 0] * iwt + (1 << (AOM_QM_BITS - 1))) >>
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AOM_QM_BITS;
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const tran_low_t abs_dqcoeff = (abs_qcoeff * dequant) >> log_scale;
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dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign);
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if (abs_qcoeff) 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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/* These functions should only be called when quantisation matrices
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are not used. */
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void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block, const int16_t *zbin_ptr,
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const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
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tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
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uint16_t *eob_ptr, const int16_t *scan,
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const int16_t *iscan) {
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quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
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quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
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dequant_ptr, eob_ptr, scan, iscan, NULL, NULL, 0);
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}
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void aom_quantize_b_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block, const int16_t *zbin_ptr,
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const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
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const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
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quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
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dequant_ptr, eob_ptr, scan, iscan, NULL, NULL, 1);
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}
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void aom_quantize_b_64x64_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block, const int16_t *zbin_ptr,
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const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
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const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
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quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
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dequant_ptr, eob_ptr, scan, iscan, NULL, NULL, 2);
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}
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void aom_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block, const int16_t *zbin_ptr,
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const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
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const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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highbd_quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr,
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round_ptr, quant_ptr, quant_shift_ptr, qcoeff_ptr,
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dqcoeff_ptr, dequant_ptr, eob_ptr, scan, iscan,
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NULL, NULL, 0);
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}
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void aom_highbd_quantize_b_32x32_c(
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const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
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tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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highbd_quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr,
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round_ptr, quant_ptr, quant_shift_ptr, qcoeff_ptr,
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dqcoeff_ptr, dequant_ptr, eob_ptr, scan, iscan,
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NULL, NULL, 1);
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}
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void aom_highbd_quantize_b_64x64_c(
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const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
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tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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highbd_quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr,
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round_ptr, quant_ptr, quant_shift_ptr, qcoeff_ptr,
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dqcoeff_ptr, dequant_ptr, eob_ptr, scan, iscan,
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NULL, NULL, 2);
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}
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