1 /* 2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include <arm_neon.h> 12 13 #include <math.h> 14 15 #include "vpx_mem/vpx_mem.h" 16 17 #include "vp9/common/vp9_quant_common.h" 18 #include "vp9/common/vp9_seg_common.h" 19 20 #include "vp9/encoder/vp9_encoder.h" 21 #include "vp9/encoder/vp9_quantize.h" 22 #include "vp9/encoder/vp9_rd.h" 23 24 void vp9_quantize_fp_neon(const int16_t *coeff_ptr, intptr_t count, 25 int skip_block, const int16_t *zbin_ptr, 26 const int16_t *round_ptr, const int16_t *quant_ptr, 27 const int16_t *quant_shift_ptr, int16_t *qcoeff_ptr, 28 int16_t *dqcoeff_ptr, const int16_t *dequant_ptr, 29 uint16_t *eob_ptr, 30 const int16_t *scan, const int16_t *iscan) { 31 // TODO(jingning) Decide the need of these arguments after the 32 // quantization process is completed. 33 (void)zbin_ptr; 34 (void)quant_shift_ptr; 35 (void)scan; 36 37 if (!skip_block) { 38 // Quantization pass: All coefficients with index >= zero_flag are 39 // skippable. Note: zero_flag can be zero. 40 int i; 41 const int16x8_t v_zero = vdupq_n_s16(0); 42 const int16x8_t v_one = vdupq_n_s16(1); 43 int16x8_t v_eobmax_76543210 = vdupq_n_s16(-1); 44 int16x8_t v_round = vmovq_n_s16(round_ptr[1]); 45 int16x8_t v_quant = vmovq_n_s16(quant_ptr[1]); 46 int16x8_t v_dequant = vmovq_n_s16(dequant_ptr[1]); 47 // adjust for dc 48 v_round = vsetq_lane_s16(round_ptr[0], v_round, 0); 49 v_quant = vsetq_lane_s16(quant_ptr[0], v_quant, 0); 50 v_dequant = vsetq_lane_s16(dequant_ptr[0], v_dequant, 0); 51 // process dc and the first seven ac coeffs 52 { 53 const int16x8_t v_iscan = vld1q_s16(&iscan[0]); 54 const int16x8_t v_coeff = vld1q_s16(&coeff_ptr[0]); 55 const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); 56 const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); 57 const int32x4_t v_tmp_lo = vmull_s16(vget_low_s16(v_tmp), 58 vget_low_s16(v_quant)); 59 const int32x4_t v_tmp_hi = vmull_s16(vget_high_s16(v_tmp), 60 vget_high_s16(v_quant)); 61 const int16x8_t v_tmp2 = vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), 62 vshrn_n_s32(v_tmp_hi, 16)); 63 const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); 64 const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); 65 const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); 66 const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); 67 const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); 68 const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); 69 v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); 70 vst1q_s16(&qcoeff_ptr[0], v_qcoeff); 71 vst1q_s16(&dqcoeff_ptr[0], v_dqcoeff); 72 v_round = vmovq_n_s16(round_ptr[1]); 73 v_quant = vmovq_n_s16(quant_ptr[1]); 74 v_dequant = vmovq_n_s16(dequant_ptr[1]); 75 } 76 // now process the rest of the ac coeffs 77 for (i = 8; i < count; i += 8) { 78 const int16x8_t v_iscan = vld1q_s16(&iscan[i]); 79 const int16x8_t v_coeff = vld1q_s16(&coeff_ptr[i]); 80 const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); 81 const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); 82 const int32x4_t v_tmp_lo = vmull_s16(vget_low_s16(v_tmp), 83 vget_low_s16(v_quant)); 84 const int32x4_t v_tmp_hi = vmull_s16(vget_high_s16(v_tmp), 85 vget_high_s16(v_quant)); 86 const int16x8_t v_tmp2 = vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), 87 vshrn_n_s32(v_tmp_hi, 16)); 88 const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); 89 const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); 90 const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); 91 const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); 92 const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); 93 const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); 94 v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); 95 vst1q_s16(&qcoeff_ptr[i], v_qcoeff); 96 vst1q_s16(&dqcoeff_ptr[i], v_dqcoeff); 97 } 98 { 99 const int16x4_t v_eobmax_3210 = 100 vmax_s16(vget_low_s16(v_eobmax_76543210), 101 vget_high_s16(v_eobmax_76543210)); 102 const int64x1_t v_eobmax_xx32 = 103 vshr_n_s64(vreinterpret_s64_s16(v_eobmax_3210), 32); 104 const int16x4_t v_eobmax_tmp = 105 vmax_s16(v_eobmax_3210, vreinterpret_s16_s64(v_eobmax_xx32)); 106 const int64x1_t v_eobmax_xxx3 = 107 vshr_n_s64(vreinterpret_s64_s16(v_eobmax_tmp), 16); 108 const int16x4_t v_eobmax_final = 109 vmax_s16(v_eobmax_tmp, vreinterpret_s16_s64(v_eobmax_xxx3)); 110 111 *eob_ptr = (uint16_t)vget_lane_s16(v_eobmax_final, 0); 112 } 113 } else { 114 memset(qcoeff_ptr, 0, count * sizeof(int16_t)); 115 memset(dqcoeff_ptr, 0, count * sizeof(int16_t)); 116 *eob_ptr = 0; 117 } 118 } 119
