2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/attributes.h"
20 #include "libavutil/common.h"
27 #define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
28 #define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
29 #define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
30 #define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */
31 #define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
32 #define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
33 #define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
35 static void wmv2_idct_row(short * b
)
38 int a0
, a1
, a2
, a3
, a4
, a5
, a6
, a7
;
41 a1
= W1
* b
[1] + W7
* b
[7];
42 a7
= W7
* b
[1] - W1
* b
[7];
43 a5
= W5
* b
[5] + W3
* b
[3];
44 a3
= W3
* b
[5] - W5
* b
[3];
45 a2
= W2
* b
[2] + W6
* b
[6];
46 a6
= W6
* b
[2] - W2
* b
[6];
47 a0
= W0
* b
[0] + W0
* b
[4];
48 a4
= W0
* b
[0] - W0
* b
[4];
51 s1
= (181 * (a1
- a5
+ a7
- a3
) + 128) >> 8; // 1, 3, 5, 7
52 s2
= (181 * (a1
- a5
- a7
+ a3
) + 128) >> 8;
55 b
[0] = (a0
+ a2
+ a1
+ a5
+ (1 << 7)) >> 8;
56 b
[1] = (a4
+ a6
+ s1
+ (1 << 7)) >> 8;
57 b
[2] = (a4
- a6
+ s2
+ (1 << 7)) >> 8;
58 b
[3] = (a0
- a2
+ a7
+ a3
+ (1 << 7)) >> 8;
59 b
[4] = (a0
- a2
- a7
- a3
+ (1 << 7)) >> 8;
60 b
[5] = (a4
- a6
- s2
+ (1 << 7)) >> 8;
61 b
[6] = (a4
+ a6
- s1
+ (1 << 7)) >> 8;
62 b
[7] = (a0
+ a2
- a1
- a5
+ (1 << 7)) >> 8;
65 static void wmv2_idct_col(short * b
)
68 int a0
, a1
, a2
, a3
, a4
, a5
, a6
, a7
;
70 /* step 1, with extended precision */
71 a1
= (W1
* b
[8 * 1] + W7
* b
[8 * 7] + 4) >> 3;
72 a7
= (W7
* b
[8 * 1] - W1
* b
[8 * 7] + 4) >> 3;
73 a5
= (W5
* b
[8 * 5] + W3
* b
[8 * 3] + 4) >> 3;
74 a3
= (W3
* b
[8 * 5] - W5
* b
[8 * 3] + 4) >> 3;
75 a2
= (W2
* b
[8 * 2] + W6
* b
[8 * 6] + 4) >> 3;
76 a6
= (W6
* b
[8 * 2] - W2
* b
[8 * 6] + 4) >> 3;
77 a0
= (W0
* b
[8 * 0] + W0
* b
[8 * 4] ) >> 3;
78 a4
= (W0
* b
[8 * 0] - W0
* b
[8 * 4] ) >> 3;
81 s1
= (181 * (a1
- a5
+ a7
- a3
) + 128) >> 8;
82 s2
= (181 * (a1
- a5
- a7
+ a3
) + 128) >> 8;
85 b
[8 * 0] = (a0
+ a2
+ a1
+ a5
+ (1 << 13)) >> 14;
86 b
[8 * 1] = (a4
+ a6
+ s1
+ (1 << 13)) >> 14;
87 b
[8 * 2] = (a4
- a6
+ s2
+ (1 << 13)) >> 14;
88 b
[8 * 3] = (a0
- a2
+ a7
+ a3
+ (1 << 13)) >> 14;
90 b
[8 * 4] = (a0
- a2
- a7
- a3
+ (1 << 13)) >> 14;
91 b
[8 * 5] = (a4
- a6
- s2
+ (1 << 13)) >> 14;
92 b
[8 * 6] = (a4
+ a6
- s1
+ (1 << 13)) >> 14;
93 b
[8 * 7] = (a0
+ a2
- a1
- a5
+ (1 << 13)) >> 14;
96 static void wmv2_idct_add_c(uint8_t *dest
, int line_size
, int16_t *block
)
100 for (i
= 0; i
< 64; i
+= 8)
101 wmv2_idct_row(block
+ i
);
102 for (i
= 0; i
< 8; i
++)
103 wmv2_idct_col(block
+ i
);
105 for (i
= 0; i
< 8; i
++) {
106 dest
[0] = av_clip_uint8(dest
[0] + block
[0]);
107 dest
[1] = av_clip_uint8(dest
[1] + block
[1]);
108 dest
[2] = av_clip_uint8(dest
[2] + block
[2]);
109 dest
[3] = av_clip_uint8(dest
[3] + block
[3]);
110 dest
[4] = av_clip_uint8(dest
[4] + block
[4]);
111 dest
[5] = av_clip_uint8(dest
[5] + block
[5]);
112 dest
[6] = av_clip_uint8(dest
[6] + block
[6]);
113 dest
[7] = av_clip_uint8(dest
[7] + block
[7]);
119 static void wmv2_idct_put_c(uint8_t *dest
, int line_size
, int16_t *block
)
123 for (i
= 0; i
< 64; i
+= 8)
124 wmv2_idct_row(block
+ i
);
125 for (i
= 0; i
< 8; i
++)
126 wmv2_idct_col(block
+ i
);
128 for (i
= 0; i
< 8; i
++) {
129 dest
[0] = av_clip_uint8(block
[0]);
130 dest
[1] = av_clip_uint8(block
[1]);
131 dest
[2] = av_clip_uint8(block
[2]);
132 dest
[3] = av_clip_uint8(block
[3]);
133 dest
[4] = av_clip_uint8(block
[4]);
134 dest
[5] = av_clip_uint8(block
[5]);
135 dest
[6] = av_clip_uint8(block
[6]);
136 dest
[7] = av_clip_uint8(block
[7]);
142 static void wmv2_mspel8_h_lowpass(uint8_t *dst
, const uint8_t *src
,
143 int dstStride
, int srcStride
, int h
)
145 const uint8_t *cm
= ff_crop_tab
+ MAX_NEG_CROP
;
148 for (i
= 0; i
< h
; i
++) {
149 dst
[0] = cm
[(9 * (src
[0] + src
[1]) - (src
[-1] + src
[2]) + 8) >> 4];
150 dst
[1] = cm
[(9 * (src
[1] + src
[2]) - (src
[0] + src
[3]) + 8) >> 4];
151 dst
[2] = cm
[(9 * (src
[2] + src
[3]) - (src
[1] + src
[4]) + 8) >> 4];
152 dst
[3] = cm
[(9 * (src
[3] + src
[4]) - (src
[2] + src
[5]) + 8) >> 4];
153 dst
[4] = cm
[(9 * (src
[4] + src
[5]) - (src
[3] + src
[6]) + 8) >> 4];
154 dst
[5] = cm
[(9 * (src
[5] + src
[6]) - (src
[4] + src
[7]) + 8) >> 4];
155 dst
[6] = cm
[(9 * (src
[6] + src
[7]) - (src
[5] + src
[8]) + 8) >> 4];
156 dst
[7] = cm
[(9 * (src
[7] + src
[8]) - (src
[6] + src
[9]) + 8) >> 4];
162 static void wmv2_mspel8_v_lowpass(uint8_t *dst
, const uint8_t *src
,
163 int dstStride
, int srcStride
, int w
)
165 const uint8_t *cm
= ff_crop_tab
+ MAX_NEG_CROP
;
168 for (i
= 0; i
< w
; i
++) {
169 const int src_1
= src
[-srcStride
];
170 const int src0
= src
[0];
171 const int src1
= src
[srcStride
];
172 const int src2
= src
[2 * srcStride
];
173 const int src3
= src
[3 * srcStride
];
174 const int src4
= src
[4 * srcStride
];
175 const int src5
= src
[5 * srcStride
];
176 const int src6
= src
[6 * srcStride
];
177 const int src7
= src
[7 * srcStride
];
178 const int src8
= src
[8 * srcStride
];
179 const int src9
= src
[9 * srcStride
];
180 dst
[0 * dstStride
] = cm
[(9 * (src0
+ src1
) - (src_1
+ src2
) + 8) >> 4];
181 dst
[1 * dstStride
] = cm
[(9 * (src1
+ src2
) - (src0
+ src3
) + 8) >> 4];
182 dst
[2 * dstStride
] = cm
[(9 * (src2
+ src3
) - (src1
+ src4
) + 8) >> 4];
183 dst
[3 * dstStride
] = cm
[(9 * (src3
+ src4
) - (src2
+ src5
) + 8) >> 4];
184 dst
[4 * dstStride
] = cm
[(9 * (src4
+ src5
) - (src3
+ src6
) + 8) >> 4];
185 dst
[5 * dstStride
] = cm
[(9 * (src5
+ src6
) - (src4
+ src7
) + 8) >> 4];
186 dst
[6 * dstStride
] = cm
[(9 * (src6
+ src7
) - (src5
+ src8
) + 8) >> 4];
187 dst
[7 * dstStride
] = cm
[(9 * (src7
+ src8
) - (src6
+ src9
) + 8) >> 4];
193 static void put_mspel8_mc10_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
197 wmv2_mspel8_h_lowpass(half
, src
, 8, stride
, 8);
198 ff_put_pixels8_l2_8(dst
, src
, half
, stride
, stride
, 8, 8);
201 static void put_mspel8_mc20_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
203 wmv2_mspel8_h_lowpass(dst
, src
, stride
, stride
, 8);
206 static void put_mspel8_mc30_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
210 wmv2_mspel8_h_lowpass(half
, src
, 8, stride
, 8);
211 ff_put_pixels8_l2_8(dst
, src
+ 1, half
, stride
, stride
, 8, 8);
214 static void put_mspel8_mc02_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
216 wmv2_mspel8_v_lowpass(dst
, src
, stride
, stride
, 8);
219 static void put_mspel8_mc12_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
225 wmv2_mspel8_h_lowpass(halfH
, src
- stride
, 8, stride
, 11);
226 wmv2_mspel8_v_lowpass(halfV
, src
, 8, stride
, 8);
227 wmv2_mspel8_v_lowpass(halfHV
, halfH
+ 8, 8, 8, 8);
228 ff_put_pixels8_l2_8(dst
, halfV
, halfHV
, stride
, 8, 8, 8);
231 static void put_mspel8_mc32_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
237 wmv2_mspel8_h_lowpass(halfH
, src
- stride
, 8, stride
, 11);
238 wmv2_mspel8_v_lowpass(halfV
, src
+ 1, 8, stride
, 8);
239 wmv2_mspel8_v_lowpass(halfHV
, halfH
+ 8, 8, 8, 8);
240 ff_put_pixels8_l2_8(dst
, halfV
, halfHV
, stride
, 8, 8, 8);
243 static void put_mspel8_mc22_c(uint8_t *dst
, const uint8_t *src
, ptrdiff_t stride
)
247 wmv2_mspel8_h_lowpass(halfH
, src
- stride
, 8, stride
, 11);
248 wmv2_mspel8_v_lowpass(dst
, halfH
+ 8, stride
, 8, 8);
251 av_cold
void ff_wmv2dsp_init(WMV2DSPContext
*c
)
253 c
->idct_add
= wmv2_idct_add_c
;
254 c
->idct_put
= wmv2_idct_put_c
;
255 c
->idct_perm
= FF_IDCT_PERM_NONE
;
257 c
->put_mspel_pixels_tab
[0] = ff_put_pixels8x8_c
;
258 c
->put_mspel_pixels_tab
[1] = put_mspel8_mc10_c
;
259 c
->put_mspel_pixels_tab
[2] = put_mspel8_mc20_c
;
260 c
->put_mspel_pixels_tab
[3] = put_mspel8_mc30_c
;
261 c
->put_mspel_pixels_tab
[4] = put_mspel8_mc02_c
;
262 c
->put_mspel_pixels_tab
[5] = put_mspel8_mc12_c
;
263 c
->put_mspel_pixels_tab
[6] = put_mspel8_mc22_c
;
264 c
->put_mspel_pixels_tab
[7] = put_mspel8_mc32_c
;