| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <math.h> |
| |
| #include "config/aom_dsp_rtcd.h" |
| |
| #include "aom_dsp/quantize.h" |
| #include "aom_mem/aom_mem.h" |
| #include "aom_ports/mem.h" |
| |
| #include "av1/common/idct.h" |
| #include "av1/common/quant_common.h" |
| #include "av1/common/scan.h" |
| #include "av1/common/seg_common.h" |
| |
| #include "av1/encoder/av1_quantize.h" |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/rd.h" |
| |
| void av1_quantize_skip(intptr_t n_coeffs, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr) { |
| memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr)); |
| *eob_ptr = 0; |
| } |
| |
| int av1_quantize_fp_no_qmatrix(const int16_t quant_ptr[2], |
| const int16_t dequant_ptr[2], |
| const int16_t round_ptr[2], int log_scale, |
| const int16_t *scan, int coeff_count, |
| const tran_low_t *coeff_ptr, |
| tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr) { |
| memset(qcoeff_ptr, 0, coeff_count * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, coeff_count * sizeof(*dqcoeff_ptr)); |
| const int rounding[2] = { ROUND_POWER_OF_TWO(round_ptr[0], log_scale), |
| ROUND_POWER_OF_TWO(round_ptr[1], log_scale) }; |
| int eob = 0; |
| for (int i = 0; i < coeff_count; i++) { |
| const int rc = scan[i]; |
| const int32_t thresh = (int32_t)(dequant_ptr[rc != 0]); |
| const int coeff = coeff_ptr[rc]; |
| const int coeff_sign = AOMSIGN(coeff); |
| int64_t abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| int tmp32 = 0; |
| if ((abs_coeff << (1 + log_scale)) >= thresh) { |
| abs_coeff = clamp64(abs_coeff + rounding[rc != 0], INT16_MIN, INT16_MAX); |
| tmp32 = (int)((abs_coeff * quant_ptr[rc != 0]) >> (16 - log_scale)); |
| if (tmp32) { |
| qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign; |
| const tran_low_t abs_dqcoeff = |
| (tmp32 * dequant_ptr[rc != 0]) >> log_scale; |
| dqcoeff_ptr[rc] = (abs_dqcoeff ^ coeff_sign) - coeff_sign; |
| } |
| } |
| if (tmp32) eob = i + 1; |
| } |
| return eob; |
| } |
| |
| static void quantize_fp_helper_c( |
| const tran_low_t *coeff_ptr, intptr_t n_coeffs, const int16_t *zbin_ptr, |
| const int16_t *round_ptr, const int16_t *quant_ptr, |
| const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan, const qm_val_t *qm_ptr, |
| const qm_val_t *iqm_ptr, int log_scale) { |
| int i, eob = -1; |
| const int rounding[2] = { ROUND_POWER_OF_TWO(round_ptr[0], log_scale), |
| ROUND_POWER_OF_TWO(round_ptr[1], log_scale) }; |
| // TODO(jingning) Decide the need of these arguments after the |
| // quantization process is completed. |
| (void)zbin_ptr; |
| (void)quant_shift_ptr; |
| (void)iscan; |
| |
| memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr)); |
| |
| if (qm_ptr == NULL && iqm_ptr == NULL) { |
| *eob_ptr = av1_quantize_fp_no_qmatrix(quant_ptr, dequant_ptr, round_ptr, |
| log_scale, scan, (int)n_coeffs, |
| coeff_ptr, qcoeff_ptr, dqcoeff_ptr); |
| } else { |
| // Quantization pass: All coefficients with index >= zero_flag are |
| // skippable. Note: zero_flag can be zero. |
| for (i = 0; i < n_coeffs; i++) { |
| const int rc = scan[i]; |
| const int coeff = coeff_ptr[rc]; |
| const qm_val_t wt = qm_ptr ? qm_ptr[rc] : (1 << AOM_QM_BITS); |
| const qm_val_t iwt = iqm_ptr ? iqm_ptr[rc] : (1 << AOM_QM_BITS); |
| const int dequant = |
| (dequant_ptr[rc != 0] * iwt + (1 << (AOM_QM_BITS - 1))) >> |
| AOM_QM_BITS; |
| const int coeff_sign = AOMSIGN(coeff); |
| int64_t abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| int tmp32 = 0; |
| if (abs_coeff * wt >= |
| (dequant_ptr[rc != 0] << (AOM_QM_BITS - (1 + log_scale)))) { |
| abs_coeff += rounding[rc != 0]; |
| abs_coeff = clamp64(abs_coeff, INT16_MIN, INT16_MAX); |
| tmp32 = (int)((abs_coeff * wt * quant_ptr[rc != 0]) >> |
| (16 - log_scale + AOM_QM_BITS)); |
| qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign; |
| const tran_low_t abs_dqcoeff = (tmp32 * dequant) >> log_scale; |
| dqcoeff_ptr[rc] = (abs_dqcoeff ^ coeff_sign) - coeff_sign; |
| } |
| |
| if (tmp32) eob = i; |
| } |
| *eob_ptr = eob + 1; |
| } |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| static void highbd_quantize_fp_helper_c( |
| const tran_low_t *coeff_ptr, intptr_t count, const int16_t *zbin_ptr, |
| const int16_t *round_ptr, const int16_t *quant_ptr, |
| const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan, const qm_val_t *qm_ptr, |
| const qm_val_t *iqm_ptr, int log_scale) { |
| int i; |
| int eob = -1; |
| const int shift = 16 - log_scale; |
| // TODO(jingning) Decide the need of these arguments after the |
| // quantization process is completed. |
| (void)zbin_ptr; |
| (void)quant_shift_ptr; |
| (void)iscan; |
| |
| if (qm_ptr || iqm_ptr) { |
| // Quantization pass: All coefficients with index >= zero_flag are |
| // skippable. Note: zero_flag can be zero. |
| for (i = 0; i < count; i++) { |
| const int rc = scan[i]; |
| const int coeff = coeff_ptr[rc]; |
| const qm_val_t wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS); |
| const qm_val_t iwt = iqm_ptr != NULL ? iqm_ptr[rc] : (1 << AOM_QM_BITS); |
| const int dequant = |
| (dequant_ptr[rc != 0] * iwt + (1 << (AOM_QM_BITS - 1))) >> |
| AOM_QM_BITS; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int64_t abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| int abs_qcoeff = 0; |
| if (abs_coeff * wt >= |
| (dequant_ptr[rc != 0] << (AOM_QM_BITS - (1 + log_scale)))) { |
| const int64_t tmp = |
| abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], log_scale); |
| abs_qcoeff = |
| (int)((tmp * quant_ptr[rc != 0] * wt) >> (shift + AOM_QM_BITS)); |
| qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); |
| const tran_low_t abs_dqcoeff = (abs_qcoeff * dequant) >> log_scale; |
| dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); |
| if (abs_qcoeff) eob = i; |
| } else { |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| } |
| } |
| } else { |
| const int log_scaled_round_arr[2] = { |
| ROUND_POWER_OF_TWO(round_ptr[0], log_scale), |
| ROUND_POWER_OF_TWO(round_ptr[1], log_scale), |
| }; |
| for (i = 0; i < count; i++) { |
| const int rc = scan[i]; |
| const int coeff = coeff_ptr[rc]; |
| const int rc01 = (rc != 0); |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| const int log_scaled_round = log_scaled_round_arr[rc01]; |
| if ((abs_coeff << (1 + log_scale)) >= dequant_ptr[rc01]) { |
| const int quant = quant_ptr[rc01]; |
| const int dequant = dequant_ptr[rc01]; |
| const int64_t tmp = (int64_t)abs_coeff + log_scaled_round; |
| const int abs_qcoeff = (int)((tmp * quant) >> shift); |
| qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); |
| const tran_low_t abs_dqcoeff = (abs_qcoeff * dequant) >> log_scale; |
| if (abs_qcoeff) eob = i; |
| dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); |
| } else { |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| } |
| } |
| } |
| *eob_ptr = eob + 1; |
| } |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| void av1_quantize_fp_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const int16_t *zbin_ptr, const int16_t *round_ptr, |
| const int16_t *quant_ptr, const int16_t *quant_shift_ptr, |
| tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, |
| const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan) { |
| quantize_fp_helper_c(coeff_ptr, n_coeffs, zbin_ptr, round_ptr, quant_ptr, |
| quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr, dequant_ptr, |
| eob_ptr, scan, iscan, NULL, NULL, 0); |
| } |
| |
| void av1_quantize_lp_c(const int16_t *coeff_ptr, intptr_t n_coeffs, |
| const int16_t *round_ptr, const int16_t *quant_ptr, |
| int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr, |
| const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan) { |
| (void)iscan; |
| int eob = -1; |
| |
| memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr)); |
| |
| // Quantization pass: All coefficients with index >= zero_flag are |
| // skippable. Note: zero_flag can be zero. |
| for (int i = 0; i < n_coeffs; i++) { |
| const int rc = scan[i]; |
| const int coeff = coeff_ptr[rc]; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| |
| int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX); |
| tmp = (tmp * quant_ptr[rc != 0]) >> 16; |
| |
| qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign; |
| dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0]; |
| |
| if (tmp) eob = i; |
| } |
| *eob_ptr = eob + 1; |
| } |
| |
| void av1_quantize_fp_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const int16_t *zbin_ptr, const int16_t *round_ptr, |
| const int16_t *quant_ptr, |
| const int16_t *quant_shift_ptr, |
| tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, |
| const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan) { |
| quantize_fp_helper_c(coeff_ptr, n_coeffs, zbin_ptr, round_ptr, quant_ptr, |
| quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr, dequant_ptr, |
| eob_ptr, scan, iscan, NULL, NULL, 1); |
| } |
| |
| void av1_quantize_fp_64x64_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const int16_t *zbin_ptr, const int16_t *round_ptr, |
| const int16_t *quant_ptr, |
| const int16_t *quant_shift_ptr, |
| tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, |
| const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan) { |
| quantize_fp_helper_c(coeff_ptr, n_coeffs, zbin_ptr, round_ptr, quant_ptr, |
| quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr, dequant_ptr, |
| eob_ptr, scan, iscan, NULL, NULL, 2); |
| } |
| |
| void av1_quantize_fp_facade(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const MACROBLOCK_PLANE *p, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, const QUANT_PARAM *qparam) { |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| quantize_fp_helper_c(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, |
| p->quant_fp_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| switch (qparam->log_scale) { |
| case 0: |
| av1_quantize_fp(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, |
| p->quant_fp_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| case 1: |
| av1_quantize_fp_32x32(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, |
| p->quant_fp_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| case 2: |
| av1_quantize_fp_64x64(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, |
| p->quant_fp_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| default: assert(0); |
| } |
| } |
| } |
| |
| void av1_quantize_b_facade(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const MACROBLOCK_PLANE *p, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, const QUANT_PARAM *qparam) { |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| if (qparam->use_quant_b_adapt) { |
| // TODO(sarahparker) These quantize_b optimizations need SIMD |
| // implementations |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| aom_quantize_b_adaptive_helper_c( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, eob_ptr, |
| sc->scan, sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| switch (qparam->log_scale) { |
| case 0: |
| aom_quantize_b_adaptive(coeff_ptr, n_coeffs, p->zbin_QTX, |
| p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, |
| p->dequant_QTX, eob_ptr, sc->scan, sc->iscan); |
| break; |
| case 1: |
| aom_quantize_b_32x32_adaptive( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| case 2: |
| aom_quantize_b_64x64_adaptive( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| default: assert(0); |
| } |
| } |
| } else { |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| aom_quantize_b_helper_c(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, |
| p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| switch (qparam->log_scale) { |
| case 0: |
| aom_quantize_b(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, |
| p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| case 1: |
| aom_quantize_b_32x32(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, |
| p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| case 2: |
| aom_quantize_b_64x64(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, |
| p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| default: assert(0); |
| } |
| } |
| } |
| } |
| |
| static void quantize_dc(const tran_low_t *coeff_ptr, int n_coeffs, |
| int skip_block, const int16_t *round_ptr, |
| const int16_t quant, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, const int16_t dequant_ptr, |
| uint16_t *eob_ptr, const qm_val_t *qm_ptr, |
| const qm_val_t *iqm_ptr, const int log_scale) { |
| const int rc = 0; |
| const int coeff = coeff_ptr[rc]; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| int64_t tmp; |
| int eob = -1; |
| int32_t tmp32; |
| int dequant; |
| |
| memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr)); |
| |
| if (!skip_block) { |
| const int wt = qm_ptr != NULL ? qm_ptr[rc] : (1 << AOM_QM_BITS); |
| const int iwt = iqm_ptr != NULL ? iqm_ptr[rc] : (1 << AOM_QM_BITS); |
| tmp = clamp(abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], log_scale), |
| INT16_MIN, INT16_MAX); |
| tmp32 = (int32_t)((tmp * wt * quant) >> (16 - log_scale + AOM_QM_BITS)); |
| qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign; |
| dequant = (dequant_ptr * iwt + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS; |
| const tran_low_t abs_dqcoeff = (tmp32 * dequant) >> log_scale; |
| dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); |
| if (tmp32) eob = 0; |
| } |
| *eob_ptr = eob + 1; |
| } |
| |
| void av1_quantize_dc_facade(const tran_low_t *coeff_ptr, intptr_t n_coeffs, |
| const MACROBLOCK_PLANE *p, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, const QUANT_PARAM *qparam) { |
| // obsolete skip_block |
| const int skip_block = 0; |
| (void)sc; |
| assert(qparam->log_scale >= 0 && qparam->log_scale < (3)); |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| quantize_dc(coeff_ptr, (int)n_coeffs, skip_block, p->round_QTX, |
| p->quant_fp_QTX[0], qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX[0], |
| eob_ptr, qm_ptr, iqm_ptr, qparam->log_scale); |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| void av1_highbd_quantize_fp_facade(const tran_low_t *coeff_ptr, |
| intptr_t n_coeffs, const MACROBLOCK_PLANE *p, |
| tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, |
| const QUANT_PARAM *qparam) { |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| highbd_quantize_fp_helper_c( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, p->quant_fp_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, eob_ptr, |
| sc->scan, sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| av1_highbd_quantize_fp(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_fp_QTX, |
| p->quant_fp_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan, qparam->log_scale); |
| } |
| } |
| |
| void av1_highbd_quantize_b_facade(const tran_low_t *coeff_ptr, |
| intptr_t n_coeffs, const MACROBLOCK_PLANE *p, |
| tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, |
| const QUANT_PARAM *qparam) { |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| if (qparam->use_quant_b_adapt) { |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| aom_highbd_quantize_b_adaptive_helper_c( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, eob_ptr, |
| sc->scan, sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| switch (qparam->log_scale) { |
| case 0: |
| aom_highbd_quantize_b_adaptive( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| case 1: |
| aom_highbd_quantize_b_32x32_adaptive( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| case 2: |
| aom_highbd_quantize_b_64x64_adaptive( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| default: assert(0); |
| } |
| } |
| } else { |
| if (qm_ptr != NULL && iqm_ptr != NULL) { |
| aom_highbd_quantize_b_helper_c( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, eob_ptr, |
| sc->scan, sc->iscan, qm_ptr, iqm_ptr, qparam->log_scale); |
| } else { |
| switch (qparam->log_scale) { |
| case 0: |
| aom_highbd_quantize_b(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, |
| p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr, |
| dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan, |
| sc->iscan); |
| break; |
| case 1: |
| aom_highbd_quantize_b_32x32( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| case 2: |
| aom_highbd_quantize_b_64x64( |
| coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX, p->quant_QTX, |
| p->quant_shift_QTX, qcoeff_ptr, dqcoeff_ptr, p->dequant_QTX, |
| eob_ptr, sc->scan, sc->iscan); |
| break; |
| default: assert(0); |
| } |
| } |
| } |
| } |
| |
| static INLINE void highbd_quantize_dc( |
| const tran_low_t *coeff_ptr, int n_coeffs, int skip_block, |
| const int16_t *round_ptr, const int16_t quant, tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, const int16_t dequant_ptr, uint16_t *eob_ptr, |
| const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr, const int log_scale) { |
| int eob = -1; |
| |
| memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr)); |
| memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr)); |
| |
| if (!skip_block) { |
| const qm_val_t wt = qm_ptr != NULL ? qm_ptr[0] : (1 << AOM_QM_BITS); |
| const qm_val_t iwt = iqm_ptr != NULL ? iqm_ptr[0] : (1 << AOM_QM_BITS); |
| const int coeff = coeff_ptr[0]; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| const int64_t tmp = abs_coeff + ROUND_POWER_OF_TWO(round_ptr[0], log_scale); |
| const int64_t tmpw = tmp * wt; |
| const int abs_qcoeff = |
| (int)((tmpw * quant) >> (16 - log_scale + AOM_QM_BITS)); |
| qcoeff_ptr[0] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); |
| const int dequant = |
| (dequant_ptr * iwt + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS; |
| |
| const tran_low_t abs_dqcoeff = (abs_qcoeff * dequant) >> log_scale; |
| dqcoeff_ptr[0] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); |
| if (abs_qcoeff) eob = 0; |
| } |
| *eob_ptr = eob + 1; |
| } |
| |
| void av1_highbd_quantize_dc_facade(const tran_low_t *coeff_ptr, |
| intptr_t n_coeffs, const MACROBLOCK_PLANE *p, |
| tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, uint16_t *eob_ptr, |
| const SCAN_ORDER *sc, |
| const QUANT_PARAM *qparam) { |
| // obsolete skip_block |
| const int skip_block = 0; |
| const qm_val_t *qm_ptr = qparam->qmatrix; |
| const qm_val_t *iqm_ptr = qparam->iqmatrix; |
| (void)sc; |
| |
| highbd_quantize_dc(coeff_ptr, (int)n_coeffs, skip_block, p->round_QTX, |
| p->quant_fp_QTX[0], qcoeff_ptr, dqcoeff_ptr, |
| p->dequant_QTX[0], eob_ptr, qm_ptr, iqm_ptr, |
| qparam->log_scale); |
| } |
| |
| void av1_highbd_quantize_fp_c(const tran_low_t *coeff_ptr, intptr_t count, |
| const int16_t *zbin_ptr, const int16_t *round_ptr, |
| const int16_t *quant_ptr, |
| const int16_t *quant_shift_ptr, |
| tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, |
| const int16_t *dequant_ptr, uint16_t *eob_ptr, |
| const int16_t *scan, const int16_t *iscan, |
| int log_scale) { |
| highbd_quantize_fp_helper_c(coeff_ptr, count, zbin_ptr, round_ptr, quant_ptr, |
| quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr, |
| dequant_ptr, eob_ptr, scan, iscan, NULL, NULL, |
| log_scale); |
| } |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| static void invert_quant(int16_t *quant, int16_t *shift, int d) { |
| uint32_t t; |
| int l, m; |
| t = d; |
| for (l = 0; t > 1; l++) t >>= 1; |
| m = 1 + (1 << (16 + l)) / d; |
| *quant = (int16_t)(m - (1 << 16)); |
| *shift = 1 << (16 - l); |
| } |
| |
| static int get_qzbin_factor(int q, aom_bit_depth_t bit_depth) { |
| const int quant = av1_dc_quant_QTX(q, 0, bit_depth); |
| switch (bit_depth) { |
| case AOM_BITS_8: return q == 0 ? 64 : (quant < 148 ? 84 : 80); |
| case AOM_BITS_10: return q == 0 ? 64 : (quant < 592 ? 84 : 80); |
| case AOM_BITS_12: return q == 0 ? 64 : (quant < 2368 ? 84 : 80); |
| default: |
| assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12"); |
| return -1; |
| } |
| } |
| |
| void av1_build_quantizer(aom_bit_depth_t bit_depth, int y_dc_delta_q, |
| int u_dc_delta_q, int u_ac_delta_q, int v_dc_delta_q, |
| int v_ac_delta_q, QUANTS *const quants, |
| Dequants *const deq) { |
| int i, q, quant_QTX; |
| |
| for (q = 0; q < QINDEX_RANGE; q++) { |
| const int qzbin_factor = get_qzbin_factor(q, bit_depth); |
| const int qrounding_factor = q == 0 ? 64 : 48; |
| |
| for (i = 0; i < 2; ++i) { |
| const int qrounding_factor_fp = 64; |
| // y quantizer with TX scale |
| quant_QTX = i == 0 ? av1_dc_quant_QTX(q, y_dc_delta_q, bit_depth) |
| : av1_ac_quant_QTX(q, 0, bit_depth); |
| invert_quant(&quants->y_quant[q][i], &quants->y_quant_shift[q][i], |
| quant_QTX); |
| quants->y_quant_fp[q][i] = (1 << 16) / quant_QTX; |
| quants->y_round_fp[q][i] = (qrounding_factor_fp * quant_QTX) >> 7; |
| quants->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant_QTX, 7); |
| quants->y_round[q][i] = (qrounding_factor * quant_QTX) >> 7; |
| deq->y_dequant_QTX[q][i] = quant_QTX; |
| |
| // u quantizer with TX scale |
| quant_QTX = i == 0 ? av1_dc_quant_QTX(q, u_dc_delta_q, bit_depth) |
| : av1_ac_quant_QTX(q, u_ac_delta_q, bit_depth); |
| invert_quant(&quants->u_quant[q][i], &quants->u_quant_shift[q][i], |
| quant_QTX); |
| quants->u_quant_fp[q][i] = (1 << 16) / quant_QTX; |
| quants->u_round_fp[q][i] = (qrounding_factor_fp * quant_QTX) >> 7; |
| quants->u_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant_QTX, 7); |
| quants->u_round[q][i] = (qrounding_factor * quant_QTX) >> 7; |
| deq->u_dequant_QTX[q][i] = quant_QTX; |
| |
| // v quantizer with TX scale |
| quant_QTX = i == 0 ? av1_dc_quant_QTX(q, v_dc_delta_q, bit_depth) |
| : av1_ac_quant_QTX(q, v_ac_delta_q, bit_depth); |
| invert_quant(&quants->v_quant[q][i], &quants->v_quant_shift[q][i], |
| quant_QTX); |
| quants->v_quant_fp[q][i] = (1 << 16) / quant_QTX; |
| quants->v_round_fp[q][i] = (qrounding_factor_fp * quant_QTX) >> 7; |
| quants->v_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant_QTX, 7); |
| quants->v_round[q][i] = (qrounding_factor * quant_QTX) >> 7; |
| deq->v_dequant_QTX[q][i] = quant_QTX; |
| } |
| |
| for (i = 2; i < 8; i++) { // 8: SIMD width |
| quants->y_quant[q][i] = quants->y_quant[q][1]; |
| quants->y_quant_fp[q][i] = quants->y_quant_fp[q][1]; |
| quants->y_round_fp[q][i] = quants->y_round_fp[q][1]; |
| quants->y_quant_shift[q][i] = quants->y_quant_shift[q][1]; |
| quants->y_zbin[q][i] = quants->y_zbin[q][1]; |
| quants->y_round[q][i] = quants->y_round[q][1]; |
| deq->y_dequant_QTX[q][i] = deq->y_dequant_QTX[q][1]; |
| |
| quants->u_quant[q][i] = quants->u_quant[q][1]; |
| quants->u_quant_fp[q][i] = quants->u_quant_fp[q][1]; |
| quants->u_round_fp[q][i] = quants->u_round_fp[q][1]; |
| quants->u_quant_shift[q][i] = quants->u_quant_shift[q][1]; |
| quants->u_zbin[q][i] = quants->u_zbin[q][1]; |
| quants->u_round[q][i] = quants->u_round[q][1]; |
| deq->u_dequant_QTX[q][i] = deq->u_dequant_QTX[q][1]; |
| |
| quants->v_quant[q][i] = quants->v_quant[q][1]; |
| quants->v_quant_fp[q][i] = quants->v_quant_fp[q][1]; |
| quants->v_round_fp[q][i] = quants->v_round_fp[q][1]; |
| quants->v_quant_shift[q][i] = quants->v_quant_shift[q][1]; |
| quants->v_zbin[q][i] = quants->v_zbin[q][1]; |
| quants->v_round[q][i] = quants->v_round[q][1]; |
| deq->v_dequant_QTX[q][i] = deq->v_dequant_QTX[q][1]; |
| } |
| } |
| } |
| |
| void av1_init_quantizer(EncQuantDequantParams *const enc_quant_dequant_params, |
| const CommonQuantParams *quant_params, |
| aom_bit_depth_t bit_depth) { |
| QUANTS *const quants = &enc_quant_dequant_params->quants; |
| Dequants *const dequants = &enc_quant_dequant_params->dequants; |
| av1_build_quantizer(bit_depth, quant_params->y_dc_delta_q, |
| quant_params->u_dc_delta_q, quant_params->u_ac_delta_q, |
| quant_params->v_dc_delta_q, quant_params->v_ac_delta_q, |
| quants, dequants); |
| } |
| |
| void av1_set_q_index(const EncQuantDequantParams *enc_quant_dequant_params, |
| int qindex, MACROBLOCK *x) { |
| const QUANTS *const quants = &enc_quant_dequant_params->quants; |
| const Dequants *const dequants = &enc_quant_dequant_params->dequants; |
| x->qindex = qindex; |
| x->seg_skip_block = |
| 0; // TODO(angiebird): Find a proper place to init this variable. |
| |
| // Y |
| x->plane[0].quant_QTX = quants->y_quant[qindex]; |
| x->plane[0].quant_fp_QTX = quants->y_quant_fp[qindex]; |
| x->plane[0].round_fp_QTX = quants->y_round_fp[qindex]; |
| x->plane[0].quant_shift_QTX = quants->y_quant_shift[qindex]; |
| x->plane[0].zbin_QTX = quants->y_zbin[qindex]; |
| x->plane[0].round_QTX = quants->y_round[qindex]; |
| x->plane[0].dequant_QTX = dequants->y_dequant_QTX[qindex]; |
| |
| // U |
| x->plane[1].quant_QTX = quants->u_quant[qindex]; |
| x->plane[1].quant_fp_QTX = quants->u_quant_fp[qindex]; |
| x->plane[1].round_fp_QTX = quants->u_round_fp[qindex]; |
| x->plane[1].quant_shift_QTX = quants->u_quant_shift[qindex]; |
| x->plane[1].zbin_QTX = quants->u_zbin[qindex]; |
| x->plane[1].round_QTX = quants->u_round[qindex]; |
| x->plane[1].dequant_QTX = dequants->u_dequant_QTX[qindex]; |
| |
| // V |
| x->plane[2].quant_QTX = quants->v_quant[qindex]; |
| x->plane[2].quant_fp_QTX = quants->v_quant_fp[qindex]; |
| x->plane[2].round_fp_QTX = quants->v_round_fp[qindex]; |
| x->plane[2].quant_shift_QTX = quants->v_quant_shift[qindex]; |
| x->plane[2].zbin_QTX = quants->v_zbin[qindex]; |
| x->plane[2].round_QTX = quants->v_round[qindex]; |
| x->plane[2].dequant_QTX = dequants->v_dequant_QTX[qindex]; |
| } |
| |
| void av1_set_qmatrix(const CommonQuantParams *quant_params, int segment_id, |
| MACROBLOCKD *xd) { |
| const int use_qmatrix = av1_use_qmatrix(quant_params, xd, segment_id); |
| const int qmlevel_y = |
| use_qmatrix ? quant_params->qmatrix_level_y : NUM_QM_LEVELS - 1; |
| const int qmlevel_u = |
| use_qmatrix ? quant_params->qmatrix_level_u : NUM_QM_LEVELS - 1; |
| const int qmlevel_v = |
| use_qmatrix ? quant_params->qmatrix_level_v : NUM_QM_LEVELS - 1; |
| const int qmlevel_ls[MAX_MB_PLANE] = { qmlevel_y, qmlevel_u, qmlevel_v }; |
| for (int i = 0; i < MAX_MB_PLANE; ++i) { |
| const int qmlevel = qmlevel_ls[i]; |
| memcpy(&xd->plane[i].seg_qmatrix[segment_id], |
| quant_params->gqmatrix[qmlevel][i], |
| sizeof(quant_params->gqmatrix[qmlevel][i])); |
| memcpy(&xd->plane[i].seg_iqmatrix[segment_id], |
| quant_params->giqmatrix[qmlevel][i], |
| sizeof(quant_params->giqmatrix[qmlevel][i])); |
| } |
| } |
| |
| void av1_init_plane_quantizers(const AV1_COMP *cpi, MACROBLOCK *x, |
| int segment_id) { |
| const AV1_COMMON *const cm = &cpi->common; |
| const CommonQuantParams *const quant_params = &cm->quant_params; |
| const int current_qindex = AOMMAX( |
| 0, |
| AOMMIN(QINDEX_RANGE - 1, cm->delta_q_info.delta_q_present_flag |
| ? quant_params->base_qindex + x->delta_qindex |
| : quant_params->base_qindex)); |
| const int qindex = av1_get_qindex(&cm->seg, segment_id, current_qindex); |
| const int rdmult = |
| av1_compute_rd_mult(cpi, qindex + quant_params->y_dc_delta_q); |
| av1_set_q_index(&cpi->enc_quant_dequant_params, qindex, x); |
| |
| MACROBLOCKD *const xd = &x->e_mbd; |
| av1_set_qmatrix(quant_params, segment_id, xd); |
| |
| x->seg_skip_block = segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP); |
| |
| av1_set_error_per_bit(&x->errorperbit, rdmult); |
| av1_set_sad_per_bit(cpi, &x->sadperbit, qindex); |
| } |
| |
| void av1_frame_init_quantizer(AV1_COMP *cpi) { |
| MACROBLOCK *const x = &cpi->td.mb; |
| MACROBLOCKD *const xd = &x->e_mbd; |
| av1_init_plane_quantizers(cpi, x, xd->mi[0]->segment_id); |
| } |
| |
| static int adjust_hdr_cb_deltaq(int base_qindex) { |
| double baseQp = base_qindex / QP_SCALE_FACTOR; |
| const double chromaQp = CHROMA_QP_SCALE * baseQp + CHROMA_QP_OFFSET; |
| const double dcbQP = CHROMA_CB_QP_SCALE * chromaQp * QP_SCALE_FACTOR; |
| int dqpCb = (int)(dcbQP + (dcbQP < 0 ? -0.5 : 0.5)); |
| dqpCb = AOMMIN(0, dqpCb); |
| dqpCb = (int)CLIP(dqpCb, -12 * QP_SCALE_FACTOR, 12 * QP_SCALE_FACTOR); |
| return dqpCb; |
| } |
| |
| static int adjust_hdr_cr_deltaq(int base_qindex) { |
| double baseQp = base_qindex / QP_SCALE_FACTOR; |
| const double chromaQp = CHROMA_QP_SCALE * baseQp + CHROMA_QP_OFFSET; |
| const double dcrQP = CHROMA_CR_QP_SCALE * chromaQp * QP_SCALE_FACTOR; |
| int dqpCr = (int)(dcrQP + (dcrQP < 0 ? -0.5 : 0.5)); |
| dqpCr = AOMMIN(0, dqpCr); |
| dqpCr = (int)CLIP(dqpCr, -12 * QP_SCALE_FACTOR, 12 * QP_SCALE_FACTOR); |
| return dqpCr; |
| } |
| |
| void av1_set_quantizer(AV1_COMMON *const cm, int min_qmlevel, int max_qmlevel, |
| int q, int enable_chroma_deltaq, int enable_hdr_deltaq) { |
| // quantizer has to be reinitialized with av1_init_quantizer() if any |
| // delta_q changes. |
| CommonQuantParams *quant_params = &cm->quant_params; |
| quant_params->base_qindex = AOMMAX(cm->delta_q_info.delta_q_present_flag, q); |
| quant_params->y_dc_delta_q = 0; |
| |
| if (enable_chroma_deltaq) { |
| // TODO(aomedia:2717): need to design better delta |
| quant_params->u_dc_delta_q = 2; |
| quant_params->u_ac_delta_q = 2; |
| quant_params->v_dc_delta_q = 2; |
| quant_params->v_ac_delta_q = 2; |
| } else { |
| quant_params->u_dc_delta_q = 0; |
| quant_params->u_ac_delta_q = 0; |
| quant_params->v_dc_delta_q = 0; |
| quant_params->v_ac_delta_q = 0; |
| } |
| |
| // following section 8.3.2 in T-REC-H.Sup15 document |
| // to apply to AV1 qindex in the range of [0, 255] |
| if (enable_hdr_deltaq) { |
| int dqpCb = adjust_hdr_cb_deltaq(quant_params->base_qindex); |
| int dqpCr = adjust_hdr_cr_deltaq(quant_params->base_qindex); |
| quant_params->u_dc_delta_q = quant_params->u_ac_delta_q = dqpCb; |
| quant_params->v_dc_delta_q = quant_params->v_ac_delta_q = dqpCr; |
| if (dqpCb != dqpCr) { |
| cm->seq_params->separate_uv_delta_q = 1; |
| } |
| } |
| |
| quant_params->qmatrix_level_y = |
| aom_get_qmlevel(quant_params->base_qindex, min_qmlevel, max_qmlevel); |
| quant_params->qmatrix_level_u = |
| aom_get_qmlevel(quant_params->base_qindex + quant_params->u_ac_delta_q, |
| min_qmlevel, max_qmlevel); |
| |
| if (!cm->seq_params->separate_uv_delta_q) |
| quant_params->qmatrix_level_v = quant_params->qmatrix_level_u; |
| else |
| quant_params->qmatrix_level_v = |
| aom_get_qmlevel(quant_params->base_qindex + quant_params->v_ac_delta_q, |
| min_qmlevel, max_qmlevel); |
| } |
| |
| // 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 av1_quantizer_to_qindex(int quantizer) { |
| return quantizer_to_qindex[quantizer]; |
| } |
| |
| int av1_qindex_to_quantizer(int qindex) { |
| int quantizer; |
| |
| for (quantizer = 0; quantizer < 64; ++quantizer) |
| if (quantizer_to_qindex[quantizer] >= qindex) return quantizer; |
| |
| return 63; |
| } |
