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
vp9_quantize_fp_neon(const int16_t * coeff_ptr,intptr_t count,int skip_block,const int16_t * zbin_ptr,const int16_t * round_ptr,const int16_t * quant_ptr,const int16_t * quant_shift_ptr,int16_t * qcoeff_ptr,int16_t * dqcoeff_ptr,const int16_t * dequant_ptr,uint16_t * eob_ptr,const int16_t * scan,const int16_t * iscan)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