1 /*
2 * Bink DSP routines
3 * Copyright (c) 2009 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Bink DSP routines
25 */
26
27 #include "config.h"
28 #include "libavutil/attributes.h"
29 #include "binkdsp.h"
30
31 #define A1 2896 /* (1/sqrt(2))<<12 */
32 #define A2 2217
33 #define A3 3784
34 #define A4 -5352
35
36 #define MUL(X,Y) ((int)((unsigned)(X) * (Y)) >> 11)
37
38 #define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
39 const int a0 = (src)[s0] + (src)[s4]; \
40 const int a1 = (src)[s0] - (src)[s4]; \
41 const int a2 = (src)[s2] + (src)[s6]; \
42 const int a3 = MUL(A1, (src)[s2] - (src)[s6]); \
43 const int a4 = (src)[s5] + (src)[s3]; \
44 const int a5 = (src)[s5] - (src)[s3]; \
45 const int a6 = (src)[s1] + (src)[s7]; \
46 const int a7 = (src)[s1] - (src)[s7]; \
47 const int b0 = a4 + a6; \
48 const int b1 = MUL(A3, a5 + a7); \
49 const int b2 = MUL(A4, a5) - b0 + b1; \
50 const int b3 = MUL(A1, a6 - a4) - b2; \
51 const int b4 = MUL(A2, a7) + b3 - b1; \
52 (dest)[d0] = munge(a0+a2 +b0); \
53 (dest)[d1] = munge(a1+a3-a2+b2); \
54 (dest)[d2] = munge(a1-a3+a2+b3); \
55 (dest)[d3] = munge(a0-a2 -b4); \
56 (dest)[d4] = munge(a0-a2 +b4); \
57 (dest)[d5] = munge(a1-a3+a2-b3); \
58 (dest)[d6] = munge(a1+a3-a2-b2); \
59 (dest)[d7] = munge(a0+a2 -b0); \
60 }
61 /* end IDCT_TRANSFORM macro */
62
63 #define MUNGE_NONE(x) (x)
64 #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)
65
66 #define MUNGE_ROW(x) (((x) + 0x7F)>>8)
67 #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)
68
bink_idct_col(int * dest,const int32_t * src)69 static inline void bink_idct_col(int *dest, const int32_t *src)
70 {
71 if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {
72 dest[0] =
73 dest[8] =
74 dest[16] =
75 dest[24] =
76 dest[32] =
77 dest[40] =
78 dest[48] =
79 dest[56] = src[0];
80 } else {
81 IDCT_COL(dest, src);
82 }
83 }
84
bink_idct_c(int32_t * block)85 static void bink_idct_c(int32_t *block)
86 {
87 int i;
88 int temp[64];
89
90 for (i = 0; i < 8; i++)
91 bink_idct_col(&temp[i], &block[i]);
92 for (i = 0; i < 8; i++) {
93 IDCT_ROW( (&block[8*i]), (&temp[8*i]) );
94 }
95 }
96
bink_idct_add_c(uint8_t * dest,int linesize,int32_t * block)97 static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block)
98 {
99 int i, j;
100
101 bink_idct_c(block);
102 for (i = 0; i < 8; i++, dest += linesize, block += 8)
103 for (j = 0; j < 8; j++)
104 dest[j] += block[j];
105 }
106
bink_idct_put_c(uint8_t * dest,int linesize,int32_t * block)107 static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block)
108 {
109 int i;
110 int temp[64];
111 for (i = 0; i < 8; i++)
112 bink_idct_col(&temp[i], &block[i]);
113 for (i = 0; i < 8; i++) {
114 IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );
115 }
116 }
117
scale_block_c(const uint8_t src[64],uint8_t * dst,int linesize)118 static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize)
119 {
120 int i, j;
121 uint16_t *dst1 = (uint16_t *) dst;
122 uint16_t *dst2 = (uint16_t *)(dst + linesize);
123
124 for (j = 0; j < 8; j++) {
125 for (i = 0; i < 8; i++) {
126 dst1[i] = dst2[i] = src[i] * 0x0101;
127 }
128 src += 8;
129 dst1 += linesize;
130 dst2 += linesize;
131 }
132 }
133
add_pixels8_c(uint8_t * av_restrict pixels,int16_t * block,int line_size)134 static void add_pixels8_c(uint8_t *av_restrict pixels, int16_t *block,
135 int line_size)
136 {
137 int i;
138
139 for (i = 0; i < 8; i++) {
140 pixels[0] += block[0];
141 pixels[1] += block[1];
142 pixels[2] += block[2];
143 pixels[3] += block[3];
144 pixels[4] += block[4];
145 pixels[5] += block[5];
146 pixels[6] += block[6];
147 pixels[7] += block[7];
148 pixels += line_size;
149 block += 8;
150 }
151 }
152
ff_binkdsp_init(BinkDSPContext * c)153 av_cold void ff_binkdsp_init(BinkDSPContext *c)
154 {
155 c->idct_add = bink_idct_add_c;
156 c->idct_put = bink_idct_put_c;
157 c->scale_block = scale_block_c;
158 c->add_pixels8 = add_pixels8_c;
159 }
160