| /* |
| * Copyright (c) 2022, 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 <arm_neon.h> |
| |
| #include "config/aom_config.h" |
| |
| #include "aom_dsp/arm/mem_neon.h" |
| |
| #include "av1/common/quant_common.h" |
| #include "av1/encoder/av1_quantize.h" |
| |
| static inline uint16x4_t quantize_4(const tran_low_t *coeff_ptr, |
| tran_low_t *qcoeff_ptr, |
| tran_low_t *dqcoeff_ptr, |
| int32x4_t v_quant_s32, |
| int32x4_t v_dequant_s32, |
| int32x4_t v_round_s32, int log_scale) { |
| const int32x4_t v_coeff = vld1q_s32(coeff_ptr); |
| const int32x4_t v_coeff_sign = |
| vreinterpretq_s32_u32(vcltq_s32(v_coeff, vdupq_n_s32(0))); |
| const int32x4_t v_log_scale = vdupq_n_s32(log_scale); |
| const int32x4_t v_abs_coeff = vabsq_s32(v_coeff); |
| // ((abs_coeff << (1 + log_scale)) >= dequant_ptr[rc01]) |
| const int32x4_t v_abs_coeff_scaled = |
| vshlq_s32(v_abs_coeff, vdupq_n_s32(1 + log_scale)); |
| const uint32x4_t v_mask = vcgeq_s32(v_abs_coeff_scaled, v_dequant_s32); |
| // const int64_t tmp = vmask ? (int64_t)abs_coeff + log_scaled_round : 0 |
| const int32x4_t v_tmp = vandq_s32(vaddq_s32(v_abs_coeff, v_round_s32), |
| vreinterpretq_s32_u32(v_mask)); |
| // const int abs_qcoeff = (int)((tmp * quant) >> (16 - log_scale)); |
| const int32x4_t v_abs_qcoeff = |
| vqdmulhq_s32(vshlq_s32(v_tmp, v_log_scale), v_quant_s32); |
| // qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); |
| const int32x4_t v_qcoeff = |
| vsubq_s32(veorq_s32(v_abs_qcoeff, v_coeff_sign), v_coeff_sign); |
| // vshlq_s32 will shift right if shift value is negative. |
| const int32x4_t v_abs_dqcoeff = |
| vshlq_s32(vmulq_s32(v_abs_qcoeff, v_dequant_s32), vnegq_s32(v_log_scale)); |
| // dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); |
| const int32x4_t v_dqcoeff = |
| vsubq_s32(veorq_s32(v_abs_dqcoeff, v_coeff_sign), v_coeff_sign); |
| |
| vst1q_s32(qcoeff_ptr, v_qcoeff); |
| vst1q_s32(dqcoeff_ptr, v_dqcoeff); |
| |
| // Used to find eob. |
| const uint32x4_t nz_qcoeff_mask = vcgtq_s32(v_abs_qcoeff, vdupq_n_s32(0)); |
| return vmovn_u32(nz_qcoeff_mask); |
| } |
| |
| static inline int16x8_t get_max_lane_eob(const int16_t *iscan, |
| int16x8_t v_eobmax, |
| uint16x8_t v_mask) { |
| const int16x8_t v_iscan = vld1q_s16(&iscan[0]); |
| const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, vdupq_n_s16(1)); |
| const int16x8_t v_nz_iscan = vbslq_s16(v_mask, v_iscan_plus1, vdupq_n_s16(0)); |
| return vmaxq_s16(v_eobmax, v_nz_iscan); |
| } |
| |
| static inline uint16_t get_max_eob(int16x8_t v_eobmax) { |
| #if AOM_ARCH_AARCH64 |
| return (uint16_t)vmaxvq_s16(v_eobmax); |
| #else |
| const int16x4_t v_eobmax_3210 = |
| vmax_s16(vget_low_s16(v_eobmax), vget_high_s16(v_eobmax)); |
| const int64x1_t v_eobmax_xx32 = |
| vshr_n_s64(vreinterpret_s64_s16(v_eobmax_3210), 32); |
| const int16x4_t v_eobmax_tmp = |
| vmax_s16(v_eobmax_3210, vreinterpret_s16_s64(v_eobmax_xx32)); |
| const int64x1_t v_eobmax_xxx3 = |
| vshr_n_s64(vreinterpret_s64_s16(v_eobmax_tmp), 16); |
| const int16x4_t v_eobmax_final = |
| vmax_s16(v_eobmax_tmp, vreinterpret_s16_s64(v_eobmax_xxx3)); |
| return (uint16_t)vget_lane_s16(v_eobmax_final, 0); |
| #endif |
| } |
| |
| void av1_highbd_quantize_fp_neon( |
| 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) { |
| (void)scan; |
| (void)zbin_ptr; |
| (void)quant_shift_ptr; |
| |
| const int16x4_t v_quant = vld1_s16(quant_ptr); |
| const int16x4_t v_dequant = vld1_s16(dequant_ptr); |
| const int16x4_t v_zero = vdup_n_s16(0); |
| const uint16x4_t v_round_select = vcgt_s16(vdup_n_s16(log_scale), v_zero); |
| const int16x4_t v_round_no_scale = vld1_s16(round_ptr); |
| const int16x4_t v_round_log_scale = |
| vqrdmulh_n_s16(v_round_no_scale, (int16_t)(1 << (15 - log_scale))); |
| const int16x4_t v_round = |
| vbsl_s16(v_round_select, v_round_log_scale, v_round_no_scale); |
| int32x4_t v_round_s32 = vaddl_s16(v_round, v_zero); |
| int32x4_t v_quant_s32 = vshlq_n_s32(vaddl_s16(v_quant, v_zero), 15); |
| int32x4_t v_dequant_s32 = vaddl_s16(v_dequant, v_zero); |
| uint16x4_t v_mask_lo, v_mask_hi; |
| int16x8_t v_eobmax = vdupq_n_s16(-1); |
| |
| // DC and first 3 AC |
| v_mask_lo = quantize_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, v_quant_s32, |
| v_dequant_s32, v_round_s32, log_scale); |
| |
| // overwrite the DC constants with AC constants |
| v_round_s32 = vdupq_lane_s32(vget_low_s32(v_round_s32), 1); |
| v_quant_s32 = vdupq_lane_s32(vget_low_s32(v_quant_s32), 1); |
| v_dequant_s32 = vdupq_lane_s32(vget_low_s32(v_dequant_s32), 1); |
| |
| // 4 more AC |
| v_mask_hi = quantize_4(coeff_ptr + 4, qcoeff_ptr + 4, dqcoeff_ptr + 4, |
| v_quant_s32, v_dequant_s32, v_round_s32, log_scale); |
| |
| // Find the max lane eob for the first 8 coeffs. |
| v_eobmax = |
| get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); |
| |
| count -= 8; |
| do { |
| coeff_ptr += 8; |
| qcoeff_ptr += 8; |
| dqcoeff_ptr += 8; |
| iscan += 8; |
| v_mask_lo = quantize_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, v_quant_s32, |
| v_dequant_s32, v_round_s32, log_scale); |
| v_mask_hi = quantize_4(coeff_ptr + 4, qcoeff_ptr + 4, dqcoeff_ptr + 4, |
| v_quant_s32, v_dequant_s32, v_round_s32, log_scale); |
| // Find the max lane eob for 8 coeffs. |
| v_eobmax = |
| get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); |
| count -= 8; |
| } while (count); |
| |
| *eob_ptr = get_max_eob(v_eobmax); |
| } |
