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vp9dsp.h
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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 #ifndef AVCODEC_VP9DSP_H
25 #define AVCODEC_VP9DSP_H
26 
27 #include <stddef.h>
28 #include <stdint.h>
29 
30 #include "vp9.h"
31 
32 typedef void (*vp9_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
33  const uint8_t *ref, ptrdiff_t ref_stride,
34  int h, int mx, int my);
35 
36 typedef struct VP9DSPContext {
37  /*
38  * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
39  * dimension 2: intra prediction modes
40  *
41  * dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
42  * stride is aligned by 16 pixels
43  * top[-1] is top/left; top[4,7] is top-right for 4x4
44  */
45  // FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
46  // HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
47  // also needs to fit in with what h264/vp8/etc do
49  ptrdiff_t stride,
50  const uint8_t *left,
51  const uint8_t *top);
52 
53  /*
54  * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
55  * dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
56  *
57  * dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
58  * stride is aligned by 16 pixels
59  * block is 16-byte aligned
60  * eob indicates the position (+1) of the last non-zero coefficient,
61  * in scan-order. This can be used to write faster versions, e.g. a
62  * dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
63  * etc.
64  */
65  // FIXME also write idct_add_block() versions for whole (inter) pred
66  // blocks, so we can do 2 4x4s at once
68  ptrdiff_t stride,
69  int16_t *block, int eob);
70 
71  /*
72  * dimension 1: width of filter (0=4, 1=8, 2=16)
73  * dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
74  *
75  * dst/stride are aligned by 8
76  */
77  void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
78  int mb_lim, int lim, int hev_thr);
79 
80  /*
81  * dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
82  *
83  * The width of filter is assumed to be 16; dst/stride are aligned by 16
84  */
85  void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
86  int mb_lim, int lim, int hev_thr);
87 
88  /*
89  * dimension 1/2: width of filter (0=4, 1=8) for each filter half
90  * dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
91  *
92  * dst/stride are aligned by operation size
93  * this basically calls loop_filter[d1][d3][0](), followed by
94  * loop_filter[d2][d3][0]() on the next 8 pixels
95  * mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
96  * integer.
97  */
98  // FIXME perhaps a mix4 that operates on 32px (for AVX2)
99  void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
100  int mb_lim, int lim, int hev_thr);
101 
102  /*
103  * dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
104  * dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
105  * dimension 3: averaging type (0: put, 1: avg)
106  * dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
107  * dimension 5: y subpel interpolation (1: none, 1: 8tap/bilin)
108  *
109  * dst/stride are aligned by hsize
110  */
111  vp9_mc_func mc[5][4][2][2][2];
112 } VP9DSPContext;
113 
114 void ff_vp9dsp_init(VP9DSPContext *dsp);
115 
117 
118 #endif /* AVCODEC_VP9DSP_H */