Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / binkdsp.c
CommitLineData
2ba45a60
DM
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 IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
37 const int a0 = (src)[s0] + (src)[s4]; \
38 const int a1 = (src)[s0] - (src)[s4]; \
39 const int a2 = (src)[s2] + (src)[s6]; \
40 const int a3 = (A1*((src)[s2] - (src)[s6])) >> 11; \
41 const int a4 = (src)[s5] + (src)[s3]; \
42 const int a5 = (src)[s5] - (src)[s3]; \
43 const int a6 = (src)[s1] + (src)[s7]; \
44 const int a7 = (src)[s1] - (src)[s7]; \
45 const int b0 = a4 + a6; \
46 const int b1 = (A3*(a5 + a7)) >> 11; \
47 const int b2 = ((A4*a5) >> 11) - b0 + b1; \
48 const int b3 = (A1*(a6 - a4) >> 11) - b2; \
49 const int b4 = ((A2*a7) >> 11) + b3 - b1; \
50 (dest)[d0] = munge(a0+a2 +b0); \
51 (dest)[d1] = munge(a1+a3-a2+b2); \
52 (dest)[d2] = munge(a1-a3+a2+b3); \
53 (dest)[d3] = munge(a0-a2 -b4); \
54 (dest)[d4] = munge(a0-a2 +b4); \
55 (dest)[d5] = munge(a1-a3+a2-b3); \
56 (dest)[d6] = munge(a1+a3-a2-b2); \
57 (dest)[d7] = munge(a0+a2 -b0); \
58}
59/* end IDCT_TRANSFORM macro */
60
61#define MUNGE_NONE(x) (x)
62#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)
63
64#define MUNGE_ROW(x) (((x) + 0x7F)>>8)
65#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)
66
67static inline void bink_idct_col(int *dest, const int32_t *src)
68{
69 if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {
70 dest[0] =
71 dest[8] =
72 dest[16] =
73 dest[24] =
74 dest[32] =
75 dest[40] =
76 dest[48] =
77 dest[56] = src[0];
78 } else {
79 IDCT_COL(dest, src);
80 }
81}
82
83static void bink_idct_c(int32_t *block)
84{
85 int i;
86 int temp[64];
87
88 for (i = 0; i < 8; i++)
89 bink_idct_col(&temp[i], &block[i]);
90 for (i = 0; i < 8; i++) {
91 IDCT_ROW( (&block[8*i]), (&temp[8*i]) );
92 }
93}
94
95static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block)
96{
97 int i, j;
98
99 bink_idct_c(block);
100 for (i = 0; i < 8; i++, dest += linesize, block += 8)
101 for (j = 0; j < 8; j++)
102 dest[j] += block[j];
103}
104
105static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block)
106{
107 int i;
108 int temp[64];
109 for (i = 0; i < 8; i++)
110 bink_idct_col(&temp[i], &block[i]);
111 for (i = 0; i < 8; i++) {
112 IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );
113 }
114}
115
116static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize)
117{
118 int i, j;
119 uint16_t *dst1 = (uint16_t *) dst;
120 uint16_t *dst2 = (uint16_t *)(dst + linesize);
121
122 for (j = 0; j < 8; j++) {
123 for (i = 0; i < 8; i++) {
124 dst1[i] = dst2[i] = src[i] * 0x0101;
125 }
126 src += 8;
127 dst1 += linesize;
128 dst2 += linesize;
129 }
130}
131
132static void add_pixels8_c(uint8_t *av_restrict pixels, int16_t *block,
133 int line_size)
134{
135 int i;
136
137 for (i = 0; i < 8; i++) {
138 pixels[0] += block[0];
139 pixels[1] += block[1];
140 pixels[2] += block[2];
141 pixels[3] += block[3];
142 pixels[4] += block[4];
143 pixels[5] += block[5];
144 pixels[6] += block[6];
145 pixels[7] += block[7];
146 pixels += line_size;
147 block += 8;
148 }
149}
150
151av_cold void ff_binkdsp_init(BinkDSPContext *c)
152{
153 c->idct_add = bink_idct_add_c;
154 c->idct_put = bink_idct_put_c;
155 c->scale_block = scale_block_c;
156 c->add_pixels8 = add_pixels8_c;
157}