FFmpeg
vp9dsp.c
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1 /*
2  * VP9 compatible video decoder
3  *
4  * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
5  * Copyright (C) 2013 Clément Bœsch <u pkh me>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "libavutil/avassert.h"
25 #include "libavutil/common.h"
26 #include "vp9dsp.h"
27 
28 const DECLARE_ALIGNED(16, int16_t, ff_vp9_subpel_filters)[3][16][8] = {
30  { 0, 0, 0, 128, 0, 0, 0, 0 },
31  { 0, 1, -5, 126, 8, -3, 1, 0 },
32  { -1, 3, -10, 122, 18, -6, 2, 0 },
33  { -1, 4, -13, 118, 27, -9, 3, -1 },
34  { -1, 4, -16, 112, 37, -11, 4, -1 },
35  { -1, 5, -18, 105, 48, -14, 4, -1 },
36  { -1, 5, -19, 97, 58, -16, 5, -1 },
37  { -1, 6, -19, 88, 68, -18, 5, -1 },
38  { -1, 6, -19, 78, 78, -19, 6, -1 },
39  { -1, 5, -18, 68, 88, -19, 6, -1 },
40  { -1, 5, -16, 58, 97, -19, 5, -1 },
41  { -1, 4, -14, 48, 105, -18, 5, -1 },
42  { -1, 4, -11, 37, 112, -16, 4, -1 },
43  { -1, 3, -9, 27, 118, -13, 4, -1 },
44  { 0, 2, -6, 18, 122, -10, 3, -1 },
45  { 0, 1, -3, 8, 126, -5, 1, 0 },
46  }, [FILTER_8TAP_SHARP] = {
47  { 0, 0, 0, 128, 0, 0, 0, 0 },
48  { -1, 3, -7, 127, 8, -3, 1, 0 },
49  { -2, 5, -13, 125, 17, -6, 3, -1 },
50  { -3, 7, -17, 121, 27, -10, 5, -2 },
51  { -4, 9, -20, 115, 37, -13, 6, -2 },
52  { -4, 10, -23, 108, 48, -16, 8, -3 },
53  { -4, 10, -24, 100, 59, -19, 9, -3 },
54  { -4, 11, -24, 90, 70, -21, 10, -4 },
55  { -4, 11, -23, 80, 80, -23, 11, -4 },
56  { -4, 10, -21, 70, 90, -24, 11, -4 },
57  { -3, 9, -19, 59, 100, -24, 10, -4 },
58  { -3, 8, -16, 48, 108, -23, 10, -4 },
59  { -2, 6, -13, 37, 115, -20, 9, -4 },
60  { -2, 5, -10, 27, 121, -17, 7, -3 },
61  { -1, 3, -6, 17, 125, -13, 5, -2 },
62  { 0, 1, -3, 8, 127, -7, 3, -1 },
63  }, [FILTER_8TAP_SMOOTH] = {
64  { 0, 0, 0, 128, 0, 0, 0, 0 },
65  { -3, -1, 32, 64, 38, 1, -3, 0 },
66  { -2, -2, 29, 63, 41, 2, -3, 0 },
67  { -2, -2, 26, 63, 43, 4, -4, 0 },
68  { -2, -3, 24, 62, 46, 5, -4, 0 },
69  { -2, -3, 21, 60, 49, 7, -4, 0 },
70  { -1, -4, 18, 59, 51, 9, -4, 0 },
71  { -1, -4, 16, 57, 53, 12, -4, -1 },
72  { -1, -4, 14, 55, 55, 14, -4, -1 },
73  { -1, -4, 12, 53, 57, 16, -4, -1 },
74  { 0, -4, 9, 51, 59, 18, -4, -1 },
75  { 0, -4, 7, 49, 60, 21, -3, -2 },
76  { 0, -4, 5, 46, 62, 24, -3, -2 },
77  { 0, -4, 4, 43, 63, 26, -2, -2 },
78  { 0, -3, 2, 41, 63, 29, -2, -2 },
79  { 0, -3, 1, 38, 64, 32, -1, -3 },
80  }
81 };
82 
83 
84 av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact)
85 {
86  if (bpp == 8) {
87  ff_vp9dsp_init_8(dsp);
88  } else if (bpp == 10) {
89  ff_vp9dsp_init_10(dsp);
90  } else {
91  av_assert0(bpp == 12);
92  ff_vp9dsp_init_12(dsp);
93  }
94 
95  if (ARCH_AARCH64) ff_vp9dsp_init_aarch64(dsp, bpp);
96  if (ARCH_ARM) ff_vp9dsp_init_arm(dsp, bpp);
97  if (ARCH_X86) ff_vp9dsp_init_x86(dsp, bpp, bitexact);
98  if (ARCH_MIPS) ff_vp9dsp_init_mips(dsp, bpp);
99 }
void ff_vp9dsp_init_12(VP9DSPContext *dsp)
av_cold void ff_vp9dsp_init_aarch64(VP9DSPContext *dsp, int bpp)
av_cold void ff_vp9dsp_init_arm(VP9DSPContext *dsp, int bpp)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_vp9dsp_init_10(VP9DSPContext *dsp)
#define av_cold
Definition: attributes.h:82
void ff_vp9dsp_init_8(VP9DSPContext *dsp)
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact)
Definition: vp9dsp.c:84
const int16_t ff_vp9_subpel_filters[3][16][8]
Definition: vp9dsp.c:28
av_cold void ff_vp9dsp_init_mips(VP9DSPContext *dsp, int bpp)
simple assert() macros that are a bit more flexible than ISO C assert().
void ff_vp9dsp_init_x86(VP9DSPContext *dsp, int bpp, int bitexact)
Definition: vp9dsp_init.c:217
common internal and external API header