118 lines
5.1 KiB
C
118 lines
5.1 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <arm_neon.h>
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#include <math.h>
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#include "vpx_mem/vpx_mem.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/encoder/vp9_encoder.h"
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#include "vp9/encoder/vp9_quantize.h"
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#include "vp9/encoder/vp9_rd.h"
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void vp9_quantize_fp_neon(const int16_t *coeff_ptr, intptr_t count,
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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, int16_t *qcoeff_ptr,
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int16_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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// TODO(jingning) Decide the need of these arguments after the
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// quantization process is completed.
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(void)zbin_ptr;
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(void)quant_shift_ptr;
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(void)scan;
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if (!skip_block) {
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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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int i;
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const int16x8_t v_zero = vdupq_n_s16(0);
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const int16x8_t v_one = vdupq_n_s16(1);
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int16x8_t v_eobmax_76543210 = vdupq_n_s16(-1);
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int16x8_t v_round = vmovq_n_s16(round_ptr[1]);
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int16x8_t v_quant = vmovq_n_s16(quant_ptr[1]);
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int16x8_t v_dequant = vmovq_n_s16(dequant_ptr[1]);
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// adjust for dc
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v_round = vsetq_lane_s16(round_ptr[0], v_round, 0);
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v_quant = vsetq_lane_s16(quant_ptr[0], v_quant, 0);
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v_dequant = vsetq_lane_s16(dequant_ptr[0], v_dequant, 0);
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// process dc and the first seven ac coeffs
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{
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const int16x8_t v_iscan = vld1q_s16(&iscan[0]);
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const int16x8_t v_coeff = vld1q_s16(&coeff_ptr[0]);
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const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15);
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const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero);
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const int32x4_t v_tmp_lo =
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vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant));
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const int32x4_t v_tmp_hi =
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vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant));
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const int16x8_t v_tmp2 =
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vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16));
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const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero);
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const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one);
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const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1);
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const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign);
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const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign);
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const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant);
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v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan);
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vst1q_s16(&qcoeff_ptr[0], v_qcoeff);
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vst1q_s16(&dqcoeff_ptr[0], v_dqcoeff);
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v_round = vmovq_n_s16(round_ptr[1]);
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v_quant = vmovq_n_s16(quant_ptr[1]);
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v_dequant = vmovq_n_s16(dequant_ptr[1]);
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}
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// now process the rest of the ac coeffs
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for (i = 8; i < count; i += 8) {
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const int16x8_t v_iscan = vld1q_s16(&iscan[i]);
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const int16x8_t v_coeff = vld1q_s16(&coeff_ptr[i]);
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const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15);
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const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero);
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const int32x4_t v_tmp_lo =
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vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant));
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const int32x4_t v_tmp_hi =
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vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant));
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const int16x8_t v_tmp2 =
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vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16));
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const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero);
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const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one);
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const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1);
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const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign);
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const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign);
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const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant);
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v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan);
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vst1q_s16(&qcoeff_ptr[i], v_qcoeff);
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vst1q_s16(&dqcoeff_ptr[i], v_dqcoeff);
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}
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{
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const int16x4_t v_eobmax_3210 = vmax_s16(
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vget_low_s16(v_eobmax_76543210), vget_high_s16(v_eobmax_76543210));
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const int64x1_t v_eobmax_xx32 =
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vshr_n_s64(vreinterpret_s64_s16(v_eobmax_3210), 32);
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const int16x4_t v_eobmax_tmp =
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vmax_s16(v_eobmax_3210, vreinterpret_s16_s64(v_eobmax_xx32));
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const int64x1_t v_eobmax_xxx3 =
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vshr_n_s64(vreinterpret_s64_s16(v_eobmax_tmp), 16);
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const int16x4_t v_eobmax_final =
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vmax_s16(v_eobmax_tmp, vreinterpret_s16_s64(v_eobmax_xxx3));
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*eob_ptr = (uint16_t)vget_lane_s16(v_eobmax_final, 0);
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}
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} else {
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memset(qcoeff_ptr, 0, count * sizeof(int16_t));
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memset(dqcoeff_ptr, 0, count * sizeof(int16_t));
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*eob_ptr = 0;
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}
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}
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