aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/arm/hevcdsp_sao_neon.S
blob: 8fd9d1e0df07f28d553a23f2b7eea3ba2fb19066 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*
 * Copyright (c) 2017 Meng Wang <wangmeng.kids@bytedance.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */


#include "libavutil/arm/asm.S"
#include "neon.S"

function ff_hevc_sao_band_filter_neon_8, export=1
        push    {r4-r10}
        ldr     r5,  [sp, #28]   // width
        ldr     r4,  [sp, #32]   // height
        ldr     r8,  [sp, #36]   // offset_table
        vpush   {d8-d15}
        mov     r12,  r4         // r12 = height
        mov     r6,   r0         // r6 = r0 = dst
        mov     r7,   r1         // r7 = r1 = src
        vldm    r8,   {q0-q3}
        vmov.u16    q15,  #1
        vmov.u8     q14,  #32
0:      pld      [r1]
        cmp      r5,    #4
        beq      4f
8:      subs     r4,    #1
        vld1.8   {d16},  [r1], r3
        vshr.u8  d17,   d16,  #3   // index = [src>>3]
        vshll.u8 q9,    d17,  #1   // lowIndex = 2*index
        vadd.u16 q11,   q9,   q15  // highIndex = (2*index+1) << 8
        vshl.u16 q10,   q11,  #8   // q10: highIndex;  q9: lowIndex;
        vadd.u16 q10,   q9         // combine high and low index;
        // Look-up Table Round 1; index range: 0-15
        vtbx.8   d24,   {q0-q1},   d20
        vtbx.8   d25,   {q0-q1},   d21
        // Look-up Table Round 2; index range: 16-31
        vsub.u8  q10,   q14        // Look-up with 8bit
        vtbx.8   d24,   {q2-q3},   d20
        vtbx.8   d25,   {q2-q3},   d21
        vaddw.u8 q13,   q12,       d16
        vqmovun.s16      d8,         q13
        vst1.8    d8,   [r0],      r2
        bne      8b
        subs     r5,    #8
        beq      99f
        mov      r4,    r12
        add r6, #8
        mov r0, r6
        add r7, #8
        mov r1, r7
        b        0b
4:      subs     r4,    #1
        vld1.32   {d16[0]},  [r1],  r3
        vshr.u8  d17,   d16,  #3  // src>>3
        vshll.u8 q9,    d17,  #1   // lowIndex = 2*index
        vadd.u16 q11,   q9,   q15  // highIndex = (2*index+1) << 8
        vshl.u16 q10,   q11,  #8   // q10: highIndex;  q9: lowIndex;
        vadd.u16 q10,   q9         // combine high and low index;
        // Look-up Table Round 1; index range: 0-15
        vtbx.8   d24,   {q0-q1},   d20
        vtbx.8   d25,   {q0-q1},   d21
        // Look-up Table Round 2; index range: 16-32
        vsub.u8  q10,   q14        // Look-up with 8bit
        vtbx.8   d24,   {q2-q3},   d20
        vtbx.8   d25,   {q2-q3},   d21
        vaddw.u8 q13,   q12,       d16
        vqmovun.s16     d14,       q13
        vst1.32   d14[0],    [r0],     r2
        bne      4b
        b        99f
99:
        vpop {d8-d15}
        pop  {r4-r10}
        bx   lr
endfunc

function ff_hevc_sao_edge_filter_neon_8, export=1
        push    {r4-r11}
        ldr     r5,  [sp, #32]   // width
        ldr     r4,  [sp, #36]   // height
        ldr     r8,  [sp, #40]   // a_stride
        ldr     r9,  [sp, #44]   // b_stride
        ldr     r10, [sp, #48]   // sao_offset_val
        ldr     r11, [sp, #52]   // edge_idx
        vpush   {d8-d15}
        mov     r12,  r4         // r12 = height
        mov     r6,   r0         // r6 = r0 = dst
        mov     r7,   r1         // r7 = r1 = src
        vld1.8  {d0}, [r11]      // edge_idx tabel load in d0 5x8bit
        vld1.16 {q1}, [r10]      // sao_offset_val table load in q1, 5x16bit
        vmov.u8  d1,  #2
        vmov.u16 q2,  #1
0:      mov      r10,    r1
        add      r10,    r8           // src[x + a_stride]
        mov      r11,    r1
        add      r11,    r9           // src[x + b_stride]
        pld      [r1]
        cmp      r5,     #4
        beq      4f
8:      subs     r4,     #1
        vld1.8   {d16},  [r1],  r3    // src[x]  8x8bit
        vld1.8   {d17},  [r10], r3    // src[x + a_stride]
        vld1.8   {d18},  [r11], r3    // src[x + b_stride]
        vcgt.u8  d8,     d16,   d17
        vshr.u8  d9,     d8,    #7
        vclt.u8  d8,     d16,   d17
        vadd.u8  d8,     d9           // diff0
        vcgt.u8  d10,    d16,   d18
        vshr.u8  d11,    d10,   #7
        vclt.u8  d10,    d16,   d18
        vadd.u8  d10,    d11          // diff1
        vadd.s8  d8,     d10
        vadd.s8  d8,     d1
        vtbx.8   d9,     {d0},  d8    // offset_val
        vshll.u8 q6,     d9,    #1    // lowIndex
        vadd.u16 q7,     q6,    q2
        vshl.u16 q10,    q7,    #8    // highIndex
        vadd.u16 q10,    q6           // combine lowIndex and highIndex, offset_val
        vtbx.8   d22,    {q1},  d20
        vtbx.8   d23,    {q1},  d21
        vaddw.u8 q12,    q11,   d16
        vqmovun.s16      d26,   q12
        vst1.8   d26,    [r0],  r2
        bne      8b
        subs     r5,     #8
        beq      99f
        mov      r4,     r12
        add      r6,     #8
        mov      r0,     r6
        add      r7,     #8
        mov      r1,     r7
        b        0b
4:      subs     r4,    #1
        vld1.32   {d16[0]},  [r1],  r3
        vld1.32   {d17[0]},  [r10], r3    // src[x + a_stride]
        vld1.32   {d18[0]},  [r11], r3    // src[x + b_stride]
        vcgt.u8  d8,     d16,   d17
        vshr.u8  d9,     d8,    #7
        vclt.u8  d8,     d16,   d17
        vadd.u8  d8,     d9           // diff0
        vcgt.u8  d10,    d16,   d18
        vshr.u8  d11,    d10,   #7
        vclt.u8  d10,    d16,   d18
        vadd.u8  d10,    d11          // diff1
        vadd.s8  d8,     d10
        vadd.s8  d8,     d1
        vtbx.8   d9,     {d0},  d8    // offset_val
        vshll.u8 q6,     d9,    #1    // lowIndex
        vadd.u16 q7,     q6,    q2
        vshl.u16 q10,    q7,    #8    // highIndex
        vadd.u16 q10,    q6           // combine lowIndex and highIndex, offset_val
        vtbx.8   d22,    {q1},  d20
        vtbx.8   d23,    {q1},  d21
        vaddw.u8 q12,    q11,   d16
        vqmovun.s16      d26,   q12
        vst1.32  d26[0], [r0],  r2
        bne      4b
        b        99f
99:
        vpop {d8-d15}
        pop  {r4-r11}
        bx   lr
endfunc