FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dct32_template.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 121 121 100.0%
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Line Branch Exec Source
1 /*
2 * Template for the Discrete Cosine Transform for 32 samples
3 * Copyright (c) 2001, 2002 Fabrice Bellard
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 #include "dct32.h"
23 #include "mathops.h"
24 #include "libavutil/internal.h"
25
26 #ifdef CHECKED
27 #define SUINT int
28 #define SUINT32 int32_t
29 #else
30 #define SUINT unsigned
31 #define SUINT32 uint32_t
32 #endif
33
34 #if DCT32_FLOAT
35 # define dct32 ff_dct32_float
36 # define FIXHR(x) ((float)(x))
37 # define MULH3(x, y, s) ((s)*(y)*(x))
38 # define INTFLOAT float
39 # define SUINTFLOAT float
40 #else
41 # define dct32 ff_dct32_fixed
42 # define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
43 # define MULH3(x, y, s) MULH((s)*(x), y)
44 # define INTFLOAT int
45 # define SUINTFLOAT SUINT
46 #endif
47
48
49 /* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */
50
51 /* cos(i*pi/64) */
52
53 #define COS0_0 FIXHR(0.50060299823519630134/2)
54 #define COS0_1 FIXHR(0.50547095989754365998/2)
55 #define COS0_2 FIXHR(0.51544730992262454697/2)
56 #define COS0_3 FIXHR(0.53104259108978417447/2)
57 #define COS0_4 FIXHR(0.55310389603444452782/2)
58 #define COS0_5 FIXHR(0.58293496820613387367/2)
59 #define COS0_6 FIXHR(0.62250412303566481615/2)
60 #define COS0_7 FIXHR(0.67480834145500574602/2)
61 #define COS0_8 FIXHR(0.74453627100229844977/2)
62 #define COS0_9 FIXHR(0.83934964541552703873/2)
63 #define COS0_10 FIXHR(0.97256823786196069369/2)
64 #define COS0_11 FIXHR(1.16943993343288495515/4)
65 #define COS0_12 FIXHR(1.48416461631416627724/4)
66 #define COS0_13 FIXHR(2.05778100995341155085/8)
67 #define COS0_14 FIXHR(3.40760841846871878570/8)
68 #define COS0_15 FIXHR(10.19000812354805681150/32)
69
70 #define COS1_0 FIXHR(0.50241928618815570551/2)
71 #define COS1_1 FIXHR(0.52249861493968888062/2)
72 #define COS1_2 FIXHR(0.56694403481635770368/2)
73 #define COS1_3 FIXHR(0.64682178335999012954/2)
74 #define COS1_4 FIXHR(0.78815462345125022473/2)
75 #define COS1_5 FIXHR(1.06067768599034747134/4)
76 #define COS1_6 FIXHR(1.72244709823833392782/4)
77 #define COS1_7 FIXHR(5.10114861868916385802/16)
78
79 #define COS2_0 FIXHR(0.50979557910415916894/2)
80 #define COS2_1 FIXHR(0.60134488693504528054/2)
81 #define COS2_2 FIXHR(0.89997622313641570463/2)
82 #define COS2_3 FIXHR(2.56291544774150617881/8)
83
84 #define COS3_0 FIXHR(0.54119610014619698439/2)
85 #define COS3_1 FIXHR(1.30656296487637652785/4)
86
87 #define COS4_0 FIXHR(M_SQRT1_2/2)
88
89 /* butterfly operator */
90 #define BF(a, b, c, s)\
91 {\
92 tmp0 = val##a + val##b;\
93 tmp1 = val##a - val##b;\
94 val##a = tmp0;\
95 val##b = MULH3(tmp1, c, 1<<(s));\
96 }
97
98 #define BF0(a, b, c, s)\
99 {\
100 tmp0 = tab[a] + tab[b];\
101 tmp1 = tab[a] - tab[b];\
102 val##a = tmp0;\
103 val##b = MULH3(tmp1, c, 1<<(s));\
104 }
105
106 #define BF1(a, b, c, d)\
107 {\
108 BF(a, b, COS4_0, 1);\
109 BF(c, d,-COS4_0, 1);\
110 val##c += val##d;\
111 }
112
113 #define BF2(a, b, c, d)\
114 {\
115 BF(a, b, COS4_0, 1);\
116 BF(c, d,-COS4_0, 1);\
117 val##c += val##d;\
118 val##a += val##c;\
119 val##c += val##b;\
120 val##b += val##d;\
121 }
122
123 #define ADD(a, b) val##a += val##b
124
125 /* DCT32 without 1/sqrt(2) coef zero scaling. */
126 535842 void dct32(INTFLOAT *out, const INTFLOAT *tab_arg)
127 {
128 535842 const SUINTFLOAT *tab = tab_arg;
129 SUINTFLOAT tmp0, tmp1;
130
131 SUINTFLOAT val0 , val1 , val2 , val3 , val4 , val5 , val6 , val7 ,
132 val8 , val9 , val10, val11, val12, val13, val14, val15,
133 val16, val17, val18, val19, val20, val21, val22, val23,
134 val24, val25, val26, val27, val28, val29, val30, val31;
135
136 /* pass 1 */
137 535842 BF0( 0, 31, COS0_0 , 1);
138 535842 BF0(15, 16, COS0_15, 5);
139 /* pass 2 */
140 535842 BF( 0, 15, COS1_0 , 1);
141 535842 BF(16, 31,-COS1_0 , 1);
142 /* pass 1 */
143 535842 BF0( 7, 24, COS0_7 , 1);
144 535842 BF0( 8, 23, COS0_8 , 1);
145 /* pass 2 */
146 535842 BF( 7, 8, COS1_7 , 4);
147 535842 BF(23, 24,-COS1_7 , 4);
148 /* pass 3 */
149 535842 BF( 0, 7, COS2_0 , 1);
150 535842 BF( 8, 15,-COS2_0 , 1);
151 535842 BF(16, 23, COS2_0 , 1);
152 535842 BF(24, 31,-COS2_0 , 1);
153 /* pass 1 */
154 535842 BF0( 3, 28, COS0_3 , 1);
155 535842 BF0(12, 19, COS0_12, 2);
156 /* pass 2 */
157 535842 BF( 3, 12, COS1_3 , 1);
158 535842 BF(19, 28,-COS1_3 , 1);
159 /* pass 1 */
160 535842 BF0( 4, 27, COS0_4 , 1);
161 535842 BF0(11, 20, COS0_11, 2);
162 /* pass 2 */
163 535842 BF( 4, 11, COS1_4 , 1);
164 535842 BF(20, 27,-COS1_4 , 1);
165 /* pass 3 */
166 535842 BF( 3, 4, COS2_3 , 3);
167 535842 BF(11, 12,-COS2_3 , 3);
168 535842 BF(19, 20, COS2_3 , 3);
169 535842 BF(27, 28,-COS2_3 , 3);
170 /* pass 4 */
171 535842 BF( 0, 3, COS3_0 , 1);
172 535842 BF( 4, 7,-COS3_0 , 1);
173 535842 BF( 8, 11, COS3_0 , 1);
174 535842 BF(12, 15,-COS3_0 , 1);
175 535842 BF(16, 19, COS3_0 , 1);
176 535842 BF(20, 23,-COS3_0 , 1);
177 535842 BF(24, 27, COS3_0 , 1);
178 535842 BF(28, 31,-COS3_0 , 1);
179
180
181
182 /* pass 1 */
183 535842 BF0( 1, 30, COS0_1 , 1);
184 535842 BF0(14, 17, COS0_14, 3);
185 /* pass 2 */
186 535842 BF( 1, 14, COS1_1 , 1);
187 535842 BF(17, 30,-COS1_1 , 1);
188 /* pass 1 */
189 535842 BF0( 6, 25, COS0_6 , 1);
190 535842 BF0( 9, 22, COS0_9 , 1);
191 /* pass 2 */
192 535842 BF( 6, 9, COS1_6 , 2);
193 535842 BF(22, 25,-COS1_6 , 2);
194 /* pass 3 */
195 535842 BF( 1, 6, COS2_1 , 1);
196 535842 BF( 9, 14,-COS2_1 , 1);
197 535842 BF(17, 22, COS2_1 , 1);
198 535842 BF(25, 30,-COS2_1 , 1);
199
200 /* pass 1 */
201 535842 BF0( 2, 29, COS0_2 , 1);
202 535842 BF0(13, 18, COS0_13, 3);
203 /* pass 2 */
204 535842 BF( 2, 13, COS1_2 , 1);
205 535842 BF(18, 29,-COS1_2 , 1);
206 /* pass 1 */
207 535842 BF0( 5, 26, COS0_5 , 1);
208 535842 BF0(10, 21, COS0_10, 1);
209 /* pass 2 */
210 535842 BF( 5, 10, COS1_5 , 2);
211 535842 BF(21, 26,-COS1_5 , 2);
212 /* pass 3 */
213 535842 BF( 2, 5, COS2_2 , 1);
214 535842 BF(10, 13,-COS2_2 , 1);
215 535842 BF(18, 21, COS2_2 , 1);
216 535842 BF(26, 29,-COS2_2 , 1);
217 /* pass 4 */
218 535842 BF( 1, 2, COS3_1 , 2);
219 535842 BF( 5, 6,-COS3_1 , 2);
220 535842 BF( 9, 10, COS3_1 , 2);
221 535842 BF(13, 14,-COS3_1 , 2);
222 535842 BF(17, 18, COS3_1 , 2);
223 535842 BF(21, 22,-COS3_1 , 2);
224 535842 BF(25, 26, COS3_1 , 2);
225 535842 BF(29, 30,-COS3_1 , 2);
226
227 /* pass 5 */
228 535842 BF1( 0, 1, 2, 3);
229 535842 BF2( 4, 5, 6, 7);
230 535842 BF1( 8, 9, 10, 11);
231 535842 BF2(12, 13, 14, 15);
232 535842 BF1(16, 17, 18, 19);
233 535842 BF2(20, 21, 22, 23);
234 535842 BF1(24, 25, 26, 27);
235 535842 BF2(28, 29, 30, 31);
236
237 /* pass 6 */
238
239 535842 ADD( 8, 12);
240 535842 ADD(12, 10);
241 535842 ADD(10, 14);
242 535842 ADD(14, 9);
243 535842 ADD( 9, 13);
244 535842 ADD(13, 11);
245 535842 ADD(11, 15);
246
247 535842 out[ 0] = val0;
248 535842 out[16] = val1;
249 535842 out[ 8] = val2;
250 535842 out[24] = val3;
251 535842 out[ 4] = val4;
252 535842 out[20] = val5;
253 535842 out[12] = val6;
254 535842 out[28] = val7;
255 535842 out[ 2] = val8;
256 535842 out[18] = val9;
257 535842 out[10] = val10;
258 535842 out[26] = val11;
259 535842 out[ 6] = val12;
260 535842 out[22] = val13;
261 535842 out[14] = val14;
262 535842 out[30] = val15;
263
264 535842 ADD(24, 28);
265 535842 ADD(28, 26);
266 535842 ADD(26, 30);
267 535842 ADD(30, 25);
268 535842 ADD(25, 29);
269 535842 ADD(29, 27);
270 535842 ADD(27, 31);
271
272 535842 out[ 1] = val16 + val24;
273 535842 out[17] = val17 + val25;
274 535842 out[ 9] = val18 + val26;
275 535842 out[25] = val19 + val27;
276 535842 out[ 5] = val20 + val28;
277 535842 out[21] = val21 + val29;
278 535842 out[13] = val22 + val30;
279 535842 out[29] = val23 + val31;
280 535842 out[ 3] = val24 + val20;
281 535842 out[19] = val25 + val21;
282 535842 out[11] = val26 + val22;
283 535842 out[27] = val27 + val23;
284 535842 out[ 7] = val28 + val18;
285 535842 out[23] = val29 + val19;
286 535842 out[15] = val30 + val17;
287 535842 out[31] = val31;
288 535842 }
289