summaryrefslogtreecommitdiffstats
path: root/libavcodec/binkdsp.c
blob: a0ac2a8787b3bad58275cf016ebccd5dc5d85183 (plain)
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
/*
 * Bink DSP routines
 * Copyright (c) 2009 Konstantin Shishkov
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * Bink DSP routines
 */

#include "libavutil/attributes.h"
#include "dsputil.h"
#include "binkdsp.h"

#define A1  2896 /* (1/sqrt(2))<<12 */
#define A2  2217
#define A3  3784
#define A4 -5352

#define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
    const int a0 = (src)[s0] + (src)[s4]; \
    const int a1 = (src)[s0] - (src)[s4]; \
    const int a2 = (src)[s2] + (src)[s6]; \
    const int a3 = (A1*((src)[s2] - (src)[s6])) >> 11; \
    const int a4 = (src)[s5] + (src)[s3]; \
    const int a5 = (src)[s5] - (src)[s3]; \
    const int a6 = (src)[s1] + (src)[s7]; \
    const int a7 = (src)[s1] - (src)[s7]; \
    const int b0 = a4 + a6; \
    const int b1 = (A3*(a5 + a7)) >> 11; \
    const int b2 = ((A4*a5) >> 11) - b0 + b1; \
    const int b3 = (A1*(a6 - a4) >> 11) - b2; \
    const int b4 = ((A2*a7) >> 11) + b3 - b1; \
    (dest)[d0] = munge(a0+a2   +b0); \
    (dest)[d1] = munge(a1+a3-a2+b2); \
    (dest)[d2] = munge(a1-a3+a2+b3); \
    (dest)[d3] = munge(a0-a2   -b4); \
    (dest)[d4] = munge(a0-a2   +b4); \
    (dest)[d5] = munge(a1-a3+a2-b3); \
    (dest)[d6] = munge(a1+a3-a2-b2); \
    (dest)[d7] = munge(a0+a2   -b0); \
}
/* end IDCT_TRANSFORM macro */

#define MUNGE_NONE(x) (x)
#define IDCT_COL(dest,src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)

#define MUNGE_ROW(x) (((x) + 0x7F)>>8)
#define IDCT_ROW(dest,src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src)

static inline void bink_idct_col(int *dest, const int32_t *src)
{
    if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {
        dest[0]  =
        dest[8]  =
        dest[16] =
        dest[24] =
        dest[32] =
        dest[40] =
        dest[48] =
        dest[56] = src[0];
    } else {
        IDCT_COL(dest, src);
    }
}

static void bink_idct_c(int32_t *block)
{
    int i;
    int temp[64];

    for (i = 0; i < 8; i++)
        bink_idct_col(&temp[i], &block[i]);
    for (i = 0; i < 8; i++) {
        IDCT_ROW( (&block[8*i]), (&temp[8*i]) );
    }
}

static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block)
{
    int i, j;

    bink_idct_c(block);
    for (i = 0; i < 8; i++, dest += linesize, block += 8)
        for (j = 0; j < 8; j++)
             dest[j] += block[j];
}

static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block)
{
    int i;
    int temp[64];
    for (i = 0; i < 8; i++)
        bink_idct_col(&temp[i], &block[i]);
    for (i = 0; i < 8; i++) {
        IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );
    }
}

static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize)
{
    int i, j;
    uint16_t *dst1 = (uint16_t *) dst;
    uint16_t *dst2 = (uint16_t *)(dst + linesize);

    for (j = 0; j < 8; j++) {
        for (i = 0; i < 8; i++) {
            dst1[i] = dst2[i] = src[i] * 0x0101;
        }
        src  += 8;
        dst1 += linesize;
        dst2 += linesize;
    }
}

av_cold void ff_binkdsp_init(BinkDSPContext *c)
{
    c->idct_add    = bink_idct_add_c;
    c->idct_put    = bink_idct_put_c;
    c->scale_block = scale_block_c;
}
OpenPOWER on IntegriCloud