1 /*
2 * Copyright (c) 2015 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 <assert.h>
12 #include <emmintrin.h>
13 #include <xmmintrin.h>
14
15 #include "./vpx_dsp_rtcd.h"
16 #include "vpx/vpx_integer.h"
17 #include "vpx_dsp/x86/bitdepth_conversion_sse2.h"
18 #include "vpx_dsp/x86/quantize_sse2.h"
19 #include "vp9/common/vp9_scan.h"
20
vpx_quantize_b_sse2(const tran_low_t * coeff_ptr,intptr_t n_coeffs,const struct macroblock_plane * const mb_plane,tran_low_t * qcoeff_ptr,tran_low_t * dqcoeff_ptr,const int16_t * dequant_ptr,uint16_t * eob_ptr,const struct ScanOrder * const scan_order)21 void vpx_quantize_b_sse2(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
22 const struct macroblock_plane *const mb_plane,
23 tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
24 const int16_t *dequant_ptr, uint16_t *eob_ptr,
25 const struct ScanOrder *const scan_order) {
26 const __m128i zero = _mm_setzero_si128();
27 int index = 16;
28 const int16_t *iscan = scan_order->iscan;
29
30 __m128i zbin, round, quant, dequant, shift;
31 __m128i coeff0, coeff1, coeff0_sign, coeff1_sign;
32 __m128i qcoeff0, qcoeff1;
33 __m128i cmp_mask0, cmp_mask1;
34 __m128i eob, eob0;
35
36 // Setup global values.
37 load_b_values(mb_plane, &zbin, &round, &quant, dequant_ptr, &dequant, &shift);
38
39 // Do DC and first 15 AC.
40 coeff0 = load_tran_low(coeff_ptr);
41 coeff1 = load_tran_low(coeff_ptr + 8);
42
43 // Poor man's abs().
44 coeff0_sign = _mm_srai_epi16(coeff0, 15);
45 coeff1_sign = _mm_srai_epi16(coeff1, 15);
46 qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign);
47 qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign);
48
49 cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin);
50 zbin = _mm_unpackhi_epi64(zbin, zbin); // Switch DC to AC
51 cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);
52
53 calculate_qcoeff(&qcoeff0, round, quant, shift);
54
55 round = _mm_unpackhi_epi64(round, round);
56 quant = _mm_unpackhi_epi64(quant, quant);
57 shift = _mm_unpackhi_epi64(shift, shift);
58
59 calculate_qcoeff(&qcoeff1, round, quant, shift);
60
61 // Reinsert signs
62 qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign);
63 qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign);
64
65 // Mask out zbin threshold coeffs
66 qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0);
67 qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1);
68
69 store_tran_low(qcoeff0, qcoeff_ptr);
70 store_tran_low(qcoeff1, qcoeff_ptr + 8);
71
72 calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr);
73 dequant = _mm_unpackhi_epi64(dequant, dequant);
74 calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + 8);
75
76 eob = scan_for_eob(&qcoeff0, &qcoeff1, iscan, 0, zero);
77
78 // AC only loop.
79 while (index < n_coeffs) {
80 coeff0 = load_tran_low(coeff_ptr + index);
81 coeff1 = load_tran_low(coeff_ptr + index + 8);
82
83 coeff0_sign = _mm_srai_epi16(coeff0, 15);
84 coeff1_sign = _mm_srai_epi16(coeff1, 15);
85 qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign);
86 qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign);
87
88 cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin);
89 cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);
90
91 calculate_qcoeff(&qcoeff0, round, quant, shift);
92 calculate_qcoeff(&qcoeff1, round, quant, shift);
93
94 qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign);
95 qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign);
96
97 qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0);
98 qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1);
99
100 store_tran_low(qcoeff0, qcoeff_ptr + index);
101 store_tran_low(qcoeff1, qcoeff_ptr + index + 8);
102
103 calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr + index);
104 calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + index + 8);
105
106 eob0 = scan_for_eob(&qcoeff0, &qcoeff1, iscan, index, zero);
107 eob = _mm_max_epi16(eob, eob0);
108
109 index += 16;
110 }
111
112 *eob_ptr = accumulate_eob(eob);
113 }
114