| /* |
| * Copyright (c) 2019, 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 <immintrin.h> |
| |
| #include "config/aom_dsp_rtcd.h" |
| |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/x86/quantize_x86.h" |
| |
| #include "av1/encoder/av1_quantize.h" |
| |
| static INLINE void highbd_load_b_values_avx2( |
| const int16_t *zbin_ptr, __m256i *zbin, const int16_t *round_ptr, |
| __m256i *round, const int16_t *quant_ptr, __m256i *quant, |
| const int16_t *dequant_ptr, __m256i *dequant, const int16_t *shift_ptr, |
| __m256i *shift) { |
| *zbin = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)zbin_ptr)); |
| *zbin = _mm256_sub_epi32(*zbin, _mm256_set1_epi32(1)); |
| *round = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)round_ptr)); |
| *quant = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)quant_ptr)); |
| *dequant = |
| _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)dequant_ptr)); |
| *shift = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)shift_ptr)); |
| } |
| |
| static INLINE void highbd_update_mask1_avx2(__m256i *cmp_mask, |
| const int16_t *iscan_ptr, |
| int *is_found, __m256i *mask) { |
| __m256i temp_mask = _mm256_setzero_si256(); |
| if (_mm256_movemask_epi8(*cmp_mask)) { |
| __m256i iscan = _mm256_loadu_si256((const __m256i *)(iscan_ptr)); |
| temp_mask = _mm256_and_si256(*cmp_mask, iscan); |
| *is_found = 1; |
| } |
| *mask = _mm256_max_epi16(temp_mask, *mask); |
| } |
| |
| static INLINE void highbd_update_mask0_avx2(__m256i *qcoeff0, __m256i *qcoeff1, |
| __m256i *threshold, |
| const int16_t *iscan_ptr, |
| int *is_found, __m256i *mask) { |
| __m256i coeff[2], cmp_mask0, cmp_mask1; |
| coeff[0] = _mm256_slli_epi32(*qcoeff0, AOM_QM_BITS); |
| cmp_mask0 = _mm256_cmpgt_epi32(coeff[0], threshold[0]); |
| coeff[1] = _mm256_slli_epi32(*qcoeff1, AOM_QM_BITS); |
| cmp_mask1 = _mm256_cmpgt_epi32(coeff[1], threshold[1]); |
| cmp_mask0 = |
| _mm256_permute4x64_epi64(_mm256_packs_epi32(cmp_mask0, cmp_mask1), 0xd8); |
| highbd_update_mask1_avx2(&cmp_mask0, iscan_ptr, is_found, mask); |
| } |
| |
| static INLINE void highbd_mul_shift_avx2(const __m256i *x, const __m256i *y, |
| __m256i *p, const int shift) { |
| __m256i prod_lo = _mm256_mul_epi32(*x, *y); |
| __m256i prod_hi = _mm256_srli_epi64(*x, 32); |
| const __m256i mult_hi = _mm256_srli_epi64(*y, 32); |
| prod_hi = _mm256_mul_epi32(prod_hi, mult_hi); |
| |
| prod_lo = _mm256_srli_epi64(prod_lo, shift); |
| prod_hi = _mm256_srli_epi64(prod_hi, shift); |
| |
| prod_hi = _mm256_slli_epi64(prod_hi, 32); |
| *p = _mm256_blend_epi32(prod_lo, prod_hi, 0xaa); |
| } |
| |
| static INLINE void highbd_calculate_qcoeff_avx2(__m256i *coeff, |
| const __m256i *round, |
| const __m256i *quant, |
| const __m256i *shift, |
| const int *log_scale) { |
| __m256i tmp, qcoeff; |
| qcoeff = _mm256_add_epi32(*coeff, *round); |
| highbd_mul_shift_avx2(&qcoeff, quant, &tmp, 16); |
| qcoeff = _mm256_add_epi32(tmp, qcoeff); |
| highbd_mul_shift_avx2(&qcoeff, shift, coeff, 16 - *log_scale); |
| } |
| |
| static INLINE __m256i highbd_calculate_dqcoeff_avx2(__m256i qcoeff, |
| __m256i dequant) { |
| return _mm256_mullo_epi32(qcoeff, dequant); |
| } |
| |
| static INLINE __m256i highbd_calculate_dqcoeff_log_scale_avx2( |
| __m256i qcoeff, __m256i dequant, const int log_scale) { |
| __m256i abs_coeff = _mm256_abs_epi32(qcoeff); |
| highbd_mul_shift_avx2(&abs_coeff, &dequant, &abs_coeff, log_scale); |
| return _mm256_sign_epi32(abs_coeff, qcoeff); |
| } |
| |
| static INLINE void highbd_store_coefficients_avx2(__m256i coeff0, |
| __m256i coeff1, |
| tran_low_t *coeff_ptr) { |
| _mm256_store_si256((__m256i *)(coeff_ptr), coeff0); |
| _mm256_store_si256((__m256i *)(coeff_ptr + 8), coeff1); |
| } |
| |
| void aom_highbd_quantize_b_adaptive_avx2( |
| 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) { |
| int index = 16; |
| int non_zero_count = 0; |
| int non_zero_count_prescan_add_zero = 0; |
| int is_found0 = 0, is_found1 = 0; |
| int eob = -1; |
| const __m256i zero = _mm256_setzero_si256(); |
| __m256i zbin, round, quant, dequant, shift; |
| __m256i coeff0, qcoeff0, coeff1, qcoeff1; |
| __m256i cmp_mask, mask0 = zero, mask1 = zero; |
| __m128i temp_mask0, temp_mask1; |
| int prescan_add[2]; |
| int thresh[2]; |
| const int log_scale = 0; |
| const qm_val_t wt = (1 << AOM_QM_BITS); |
| for (int i = 0; i < 2; ++i) { |
| prescan_add[i] = ROUND_POWER_OF_TWO(dequant_ptr[i] * EOB_FACTOR, 7); |
| thresh[i] = (zbin_ptr[i] * wt + prescan_add[i]) - 1; |
| } |
| __m256i threshold[2]; |
| threshold[0] = _mm256_set1_epi32(thresh[0]); |
| threshold[1] = _mm256_set1_epi32(thresh[1]); |
| threshold[0] = _mm256_blend_epi32(threshold[0], threshold[1], 0xfe); |
| |
| #if SKIP_EOB_FACTOR_ADJUST |
| int first = -1; |
| #endif |
| |
| // Setup global values. |
| highbd_load_b_values_avx2(zbin_ptr, &zbin, round_ptr, &round, quant_ptr, |
| &quant, dequant_ptr, &dequant, quant_shift_ptr, |
| &shift); |
| |
| // Do DC and first 15 AC. |
| coeff0 = _mm256_load_si256((__m256i *)(coeff_ptr)); |
| qcoeff0 = _mm256_abs_epi32(coeff0); |
| coeff1 = _mm256_load_si256((__m256i *)(coeff_ptr + 8)); |
| qcoeff1 = _mm256_abs_epi32(coeff1); |
| highbd_update_mask0_avx2(&qcoeff0, &qcoeff1, threshold, iscan, &is_found0, |
| &mask0); |
| __m256i temp0 = _mm256_cmpgt_epi32(qcoeff0, zbin); |
| zbin = _mm256_unpackhi_epi64(zbin, zbin); |
| __m256i temp1 = _mm256_cmpgt_epi32(qcoeff1, zbin); |
| cmp_mask = _mm256_permute4x64_epi64(_mm256_packs_epi32(temp0, temp1), 0xd8); |
| highbd_update_mask1_avx2(&cmp_mask, iscan, &is_found1, &mask1); |
| threshold[0] = threshold[1]; |
| if (_mm256_movemask_epi8(cmp_mask) == 0) { |
| _mm256_store_si256((__m256i *)(qcoeff_ptr), zero); |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + 8), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + 8), zero); |
| round = _mm256_unpackhi_epi64(round, round); |
| quant = _mm256_unpackhi_epi64(quant, quant); |
| shift = _mm256_unpackhi_epi64(shift, shift); |
| dequant = _mm256_unpackhi_epi64(dequant, dequant); |
| } else { |
| highbd_calculate_qcoeff_avx2(&qcoeff0, &round, &quant, &shift, &log_scale); |
| round = _mm256_unpackhi_epi64(round, round); |
| quant = _mm256_unpackhi_epi64(quant, quant); |
| shift = _mm256_unpackhi_epi64(shift, shift); |
| highbd_calculate_qcoeff_avx2(&qcoeff1, &round, &quant, &shift, &log_scale); |
| // Reinsert signs |
| qcoeff0 = _mm256_sign_epi32(qcoeff0, coeff0); |
| qcoeff1 = _mm256_sign_epi32(qcoeff1, coeff1); |
| // Mask out zbin threshold coeffs |
| qcoeff0 = _mm256_and_si256(qcoeff0, temp0); |
| qcoeff1 = _mm256_and_si256(qcoeff1, temp1); |
| highbd_store_coefficients_avx2(qcoeff0, qcoeff1, qcoeff_ptr); |
| coeff0 = highbd_calculate_dqcoeff_avx2(qcoeff0, dequant); |
| dequant = _mm256_unpackhi_epi64(dequant, dequant); |
| coeff1 = highbd_calculate_dqcoeff_avx2(qcoeff1, dequant); |
| highbd_store_coefficients_avx2(coeff0, coeff1, dqcoeff_ptr); |
| } |
| |
| // AC only loop. |
| while (index < n_coeffs) { |
| coeff0 = _mm256_load_si256((__m256i *)(coeff_ptr + index)); |
| qcoeff0 = _mm256_abs_epi32(coeff0); |
| coeff1 = _mm256_load_si256((__m256i *)(coeff_ptr + index + 8)); |
| qcoeff1 = _mm256_abs_epi32(coeff1); |
| highbd_update_mask0_avx2(&qcoeff0, &qcoeff1, threshold, iscan + index, |
| &is_found0, &mask0); |
| temp0 = _mm256_cmpgt_epi32(qcoeff0, zbin); |
| temp1 = _mm256_cmpgt_epi32(qcoeff1, zbin); |
| cmp_mask = _mm256_permute4x64_epi64(_mm256_packs_epi32(temp0, temp1), 0xd8); |
| highbd_update_mask1_avx2(&cmp_mask, iscan + index, &is_found1, &mask1); |
| if (_mm256_movemask_epi8(cmp_mask) == 0) { |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + index), zero); |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + index + 8), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + index), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + index + 8), zero); |
| index += 16; |
| continue; |
| } |
| highbd_calculate_qcoeff_avx2(&qcoeff0, &round, &quant, &shift, &log_scale); |
| highbd_calculate_qcoeff_avx2(&qcoeff1, &round, &quant, &shift, &log_scale); |
| qcoeff0 = _mm256_sign_epi32(qcoeff0, coeff0); |
| qcoeff1 = _mm256_sign_epi32(qcoeff1, coeff1); |
| qcoeff0 = _mm256_and_si256(qcoeff0, temp0); |
| qcoeff1 = _mm256_and_si256(qcoeff1, temp1); |
| highbd_store_coefficients_avx2(qcoeff0, qcoeff1, qcoeff_ptr + index); |
| coeff0 = highbd_calculate_dqcoeff_avx2(qcoeff0, dequant); |
| coeff1 = highbd_calculate_dqcoeff_avx2(qcoeff1, dequant); |
| highbd_store_coefficients_avx2(coeff0, coeff1, dqcoeff_ptr + index); |
| index += 16; |
| } |
| if (is_found0) { |
| temp_mask0 = _mm_max_epi16(_mm256_castsi256_si128(mask0), |
| _mm256_extracti128_si256(mask0, 1)); |
| non_zero_count = calculate_non_zero_count(temp_mask0); |
| } |
| if (is_found1) { |
| temp_mask1 = _mm_max_epi16(_mm256_castsi256_si128(mask1), |
| _mm256_extracti128_si256(mask1, 1)); |
| non_zero_count_prescan_add_zero = calculate_non_zero_count(temp_mask1); |
| } |
| |
| for (int i = non_zero_count_prescan_add_zero - 1; i >= non_zero_count; i--) { |
| const int rc = scan[i]; |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| } |
| |
| for (int i = non_zero_count - 1; i >= 0; i--) { |
| const int rc = scan[i]; |
| if (qcoeff_ptr[rc]) { |
| eob = i; |
| break; |
| } |
| } |
| |
| *eob_ptr = eob + 1; |
| #if SKIP_EOB_FACTOR_ADJUST |
| // TODO(Aniket): Experiment the following loop with intrinsic by combining |
| // with the quantization loop above |
| for (int i = 0; i < non_zero_count; i++) { |
| const int rc = scan[i]; |
| const int qcoeff = qcoeff_ptr[rc]; |
| if (qcoeff) { |
| first = i; |
| break; |
| } |
| } |
| if ((*eob_ptr - 1) >= 0 && first == (*eob_ptr - 1)) { |
| const int rc = scan[(*eob_ptr - 1)]; |
| if (qcoeff_ptr[rc] == 1 || qcoeff_ptr[rc] == -1) { |
| const int coeff = coeff_ptr[rc] * wt; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| const int factor = EOB_FACTOR + SKIP_EOB_FACTOR_ADJUST; |
| const int prescan_add_val = |
| ROUND_POWER_OF_TWO(dequant_ptr[rc != 0] * factor, 7); |
| if (abs_coeff < |
| (zbin_ptr[rc != 0] * (1 << AOM_QM_BITS) + prescan_add_val)) { |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| *eob_ptr = 0; |
| } |
| } |
| } |
| #endif |
| } |
| |
| void aom_highbd_quantize_b_32x32_adaptive_avx2( |
| 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) { |
| int index = 16; |
| int non_zero_count = 0; |
| int non_zero_count_prescan_add_zero = 0; |
| int is_found0 = 0, is_found1 = 0; |
| int eob = -1; |
| const int log_scale = 1; |
| const __m256i zero = _mm256_setzero_si256(); |
| __m256i zbin, round, quant, dequant, shift; |
| __m256i coeff0, qcoeff0, coeff1, qcoeff1; |
| __m256i cmp_mask, mask0 = zero, mask1 = zero; |
| __m128i temp_mask0, temp_mask1; |
| const __m256i one = _mm256_set1_epi32(1); |
| const __m256i log_scale_vec = _mm256_set1_epi32(log_scale); |
| int prescan_add[2]; |
| int thresh[2]; |
| const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], log_scale), |
| ROUND_POWER_OF_TWO(zbin_ptr[1], log_scale) }; |
| const qm_val_t wt = (1 << AOM_QM_BITS); |
| for (int i = 0; i < 2; ++i) { |
| prescan_add[i] = ROUND_POWER_OF_TWO(dequant_ptr[i] * EOB_FACTOR, 7); |
| thresh[i] = (zbins[i] * wt + prescan_add[i]) - 1; |
| } |
| __m256i threshold[2]; |
| threshold[0] = _mm256_set1_epi32(thresh[0]); |
| threshold[1] = _mm256_set1_epi32(thresh[1]); |
| threshold[0] = _mm256_blend_epi32(threshold[0], threshold[1], 0xfe); |
| |
| #if SKIP_EOB_FACTOR_ADJUST |
| int first = -1; |
| #endif |
| |
| // Setup global values. |
| zbin = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)zbin_ptr)); |
| round = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)round_ptr)); |
| quant = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)quant_ptr)); |
| dequant = _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)dequant_ptr)); |
| shift = |
| _mm256_cvtepi16_epi32(_mm_load_si128((const __m128i *)quant_shift_ptr)); |
| |
| // Shift with rounding. |
| zbin = _mm256_add_epi32(zbin, log_scale_vec); |
| round = _mm256_add_epi32(round, log_scale_vec); |
| zbin = _mm256_srli_epi32(zbin, log_scale); |
| round = _mm256_srli_epi32(round, log_scale); |
| zbin = _mm256_sub_epi32(zbin, one); |
| |
| // Do DC and first 15 AC. |
| coeff0 = _mm256_load_si256((__m256i *)(coeff_ptr)); |
| qcoeff0 = _mm256_abs_epi32(coeff0); |
| coeff1 = _mm256_load_si256((__m256i *)(coeff_ptr + 8)); |
| qcoeff1 = _mm256_abs_epi32(coeff1); |
| highbd_update_mask0_avx2(&qcoeff0, &qcoeff1, threshold, iscan, &is_found0, |
| &mask0); |
| __m256i temp0 = _mm256_cmpgt_epi32(qcoeff0, zbin); |
| zbin = _mm256_permute2x128_si256(zbin, zbin, 0x11); |
| __m256i temp1 = _mm256_cmpgt_epi32(qcoeff1, zbin); |
| cmp_mask = _mm256_permute4x64_epi64(_mm256_packs_epi32(temp0, temp1), 0xd8); |
| highbd_update_mask1_avx2(&cmp_mask, iscan, &is_found1, &mask1); |
| threshold[0] = threshold[1]; |
| if (_mm256_movemask_epi8(cmp_mask) == 0) { |
| _mm256_store_si256((__m256i *)(qcoeff_ptr), zero); |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + 8), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + 8), zero); |
| round = _mm256_permute2x128_si256(round, round, 0x11); |
| quant = _mm256_permute2x128_si256(quant, quant, 0x11); |
| shift = _mm256_permute2x128_si256(shift, shift, 0x11); |
| dequant = _mm256_permute2x128_si256(dequant, dequant, 0x11); |
| } else { |
| highbd_calculate_qcoeff_avx2(&qcoeff0, &round, &quant, &shift, &log_scale); |
| round = _mm256_permute2x128_si256(round, round, 0x11); |
| quant = _mm256_permute2x128_si256(quant, quant, 0x11); |
| shift = _mm256_permute2x128_si256(shift, shift, 0x11); |
| highbd_calculate_qcoeff_avx2(&qcoeff1, &round, &quant, &shift, &log_scale); |
| // Reinsert signs |
| qcoeff0 = _mm256_sign_epi32(qcoeff0, coeff0); |
| qcoeff1 = _mm256_sign_epi32(qcoeff1, coeff1); |
| // Mask out zbin threshold coeffs |
| qcoeff0 = _mm256_and_si256(qcoeff0, temp0); |
| qcoeff1 = _mm256_and_si256(qcoeff1, temp1); |
| highbd_store_coefficients_avx2(qcoeff0, qcoeff1, qcoeff_ptr); |
| coeff0 = |
| highbd_calculate_dqcoeff_log_scale_avx2(qcoeff0, dequant, log_scale); |
| dequant = _mm256_permute2x128_si256(dequant, dequant, 0x11); |
| coeff1 = |
| highbd_calculate_dqcoeff_log_scale_avx2(qcoeff1, dequant, log_scale); |
| highbd_store_coefficients_avx2(coeff0, coeff1, dqcoeff_ptr); |
| } |
| |
| // AC only loop. |
| while (index < n_coeffs) { |
| coeff0 = _mm256_load_si256((__m256i *)(coeff_ptr + index)); |
| qcoeff0 = _mm256_abs_epi32(coeff0); |
| coeff1 = _mm256_load_si256((__m256i *)(coeff_ptr + index + 8)); |
| qcoeff1 = _mm256_abs_epi32(coeff1); |
| highbd_update_mask0_avx2(&qcoeff0, &qcoeff1, threshold, iscan + index, |
| &is_found0, &mask0); |
| temp0 = _mm256_cmpgt_epi32(qcoeff0, zbin); |
| temp1 = _mm256_cmpgt_epi32(qcoeff1, zbin); |
| cmp_mask = _mm256_permute4x64_epi64(_mm256_packs_epi32(temp0, temp1), 0xd8); |
| highbd_update_mask1_avx2(&cmp_mask, iscan + index, &is_found1, &mask1); |
| if (_mm256_movemask_epi8(cmp_mask) == 0) { |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + index), zero); |
| _mm256_store_si256((__m256i *)(qcoeff_ptr + index + 8), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + index), zero); |
| _mm256_store_si256((__m256i *)(dqcoeff_ptr + index + 8), zero); |
| index += 16; |
| continue; |
| } |
| highbd_calculate_qcoeff_avx2(&qcoeff0, &round, &quant, &shift, &log_scale); |
| highbd_calculate_qcoeff_avx2(&qcoeff1, &round, &quant, &shift, &log_scale); |
| qcoeff0 = _mm256_sign_epi32(qcoeff0, coeff0); |
| qcoeff1 = _mm256_sign_epi32(qcoeff1, coeff1); |
| qcoeff0 = _mm256_and_si256(qcoeff0, temp0); |
| qcoeff1 = _mm256_and_si256(qcoeff1, temp1); |
| highbd_store_coefficients_avx2(qcoeff0, qcoeff1, qcoeff_ptr + index); |
| coeff0 = |
| highbd_calculate_dqcoeff_log_scale_avx2(qcoeff0, dequant, log_scale); |
| coeff1 = |
| highbd_calculate_dqcoeff_log_scale_avx2(qcoeff1, dequant, log_scale); |
| highbd_store_coefficients_avx2(coeff0, coeff1, dqcoeff_ptr + index); |
| index += 16; |
| } |
| if (is_found0) { |
| temp_mask0 = _mm_max_epi16(_mm256_castsi256_si128(mask0), |
| _mm256_extracti128_si256(mask0, 1)); |
| non_zero_count = calculate_non_zero_count(temp_mask0); |
| } |
| if (is_found1) { |
| temp_mask1 = _mm_max_epi16(_mm256_castsi256_si128(mask1), |
| _mm256_extracti128_si256(mask1, 1)); |
| non_zero_count_prescan_add_zero = calculate_non_zero_count(temp_mask1); |
| } |
| |
| for (int i = non_zero_count_prescan_add_zero - 1; i >= non_zero_count; i--) { |
| const int rc = scan[i]; |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| } |
| |
| for (int i = non_zero_count - 1; i >= 0; i--) { |
| const int rc = scan[i]; |
| if (qcoeff_ptr[rc]) { |
| eob = i; |
| break; |
| } |
| } |
| |
| *eob_ptr = eob + 1; |
| #if SKIP_EOB_FACTOR_ADJUST |
| // TODO(Aniket): Experiment the following loop with intrinsic by combining |
| // with the quantization loop above |
| for (int i = 0; i < non_zero_count; i++) { |
| const int rc = scan[i]; |
| const int qcoeff = qcoeff_ptr[rc]; |
| if (qcoeff) { |
| first = i; |
| break; |
| } |
| } |
| if ((*eob_ptr - 1) >= 0 && first == (*eob_ptr - 1)) { |
| const int rc = scan[(*eob_ptr - 1)]; |
| if (qcoeff_ptr[rc] == 1 || qcoeff_ptr[rc] == -1) { |
| const int coeff = coeff_ptr[rc] * wt; |
| const int coeff_sign = AOMSIGN(coeff); |
| const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; |
| const int factor = EOB_FACTOR + SKIP_EOB_FACTOR_ADJUST; |
| const int prescan_add_val = |
| ROUND_POWER_OF_TWO(dequant_ptr[rc != 0] * factor, 7); |
| if (abs_coeff < (zbins[rc != 0] * (1 << AOM_QM_BITS) + prescan_add_val)) { |
| qcoeff_ptr[rc] = 0; |
| dqcoeff_ptr[rc] = 0; |
| *eob_ptr = 0; |
| } |
| } |
| } |
| #endif |
| } |
