| /* |
| * 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 <arm_neon.h> |
| |
| #include <math.h> |
| |
| #include "aom_mem/aom_mem.h" |
| |
| #include "av1/common/quant_common.h" |
| #include "av1/common/seg_common.h" |
| #include "av1/common/arm/mem_neon.h" |
| |
| #include "av1/encoder/av1_quantize.h" |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/rd.h" |
| |
| void av1_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) { |
| // TODO(jingning) Decide the need of these arguments after the |
| // quantization process is completed. |
| (void)zbin_ptr; |
| (void)quant_shift_ptr; |
| (void)scan; |
| |
| // Quantization pass: All coefficients with index >= zero_flag are |
| // skippable. Note: zero_flag can be zero. |
| int i; |
| const int16x8_t v_zero = vdupq_n_s16(0); |
| const int16x8_t v_one = vdupq_n_s16(1); |
| int16x8_t v_eobmax_76543210 = vdupq_n_s16(-1); |
| int16x8_t v_round = vmovq_n_s16(round_ptr[1]); |
| int16x8_t v_quant = vmovq_n_s16(quant_ptr[1]); |
| int16x8_t v_dequant = vmovq_n_s16(dequant_ptr[1]); |
| // adjust for dc |
| v_round = vsetq_lane_s16(round_ptr[0], v_round, 0); |
| v_quant = vsetq_lane_s16(quant_ptr[0], v_quant, 0); |
| v_dequant = vsetq_lane_s16(dequant_ptr[0], v_dequant, 0); |
| // process dc and the first seven ac coeffs |
| { |
| const int16x8_t v_iscan = vld1q_s16(&iscan[0]); |
| const int16x8_t v_coeff = load_tran_low_to_s16q(&coeff_ptr[0]); |
| const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); |
| const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); |
| const int32x4_t v_tmp_lo = |
| vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant)); |
| const int32x4_t v_tmp_hi = |
| vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant)); |
| const int16x8_t v_tmp2 = |
| vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16)); |
| const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); |
| const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); |
| const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); |
| const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); |
| const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); |
| const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); |
| v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); |
| store_s16q_to_tran_low(&qcoeff_ptr[0], v_qcoeff); |
| store_s16q_to_tran_low(&dqcoeff_ptr[0], v_dqcoeff); |
| v_round = vmovq_n_s16(round_ptr[1]); |
| v_quant = vmovq_n_s16(quant_ptr[1]); |
| v_dequant = vmovq_n_s16(dequant_ptr[1]); |
| } |
| // now process the rest of the ac coeffs |
| for (i = 8; i < count; i += 8) { |
| const int16x8_t v_iscan = vld1q_s16(&iscan[i]); |
| const int16x8_t v_coeff = load_tran_low_to_s16q(&coeff_ptr[i]); |
| const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); |
| const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); |
| const int32x4_t v_tmp_lo = |
| vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant)); |
| const int32x4_t v_tmp_hi = |
| vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant)); |
| const int16x8_t v_tmp2 = |
| vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16)); |
| const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); |
| const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); |
| const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); |
| const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); |
| const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); |
| const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); |
| v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); |
| store_s16q_to_tran_low(&qcoeff_ptr[i], v_qcoeff); |
| store_s16q_to_tran_low(&dqcoeff_ptr[i], v_dqcoeff); |
| } |
| #ifdef __aarch64__ |
| *eob_ptr = vmaxvq_s16(v_eobmax_76543210); |
| #else |
| { |
| const int16x4_t v_eobmax_3210 = vmax_s16(vget_low_s16(v_eobmax_76543210), |
| vget_high_s16(v_eobmax_76543210)); |
| 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)); |
| |
| *eob_ptr = (uint16_t)vget_lane_s16(v_eobmax_final, 0); |
| } |
| #endif // __aarch64__ |
| } |