diff options
Diffstat (limited to 'lib/rbcodec/codecs/libwmavoice/dct32.c')
-rw-r--r-- | lib/rbcodec/codecs/libwmavoice/dct32.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libwmavoice/dct32.c b/lib/rbcodec/codecs/libwmavoice/dct32.c new file mode 100644 index 0000000000..4e843ee832 --- /dev/null +++ b/lib/rbcodec/codecs/libwmavoice/dct32.c | |||
@@ -0,0 +1,267 @@ | |||
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 | #ifdef DCT32_FLOAT | ||
23 | # define FIXHR(x) ((float)(x)) | ||
24 | # define MULH3(x, y, s) ((s)*(y)*(x)) | ||
25 | # define INTFLOAT float | ||
26 | #endif | ||
27 | |||
28 | |||
29 | /* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */ | ||
30 | |||
31 | /* cos(i*pi/64) */ | ||
32 | |||
33 | #define COS0_0 FIXHR(0.50060299823519630134/2) | ||
34 | #define COS0_1 FIXHR(0.50547095989754365998/2) | ||
35 | #define COS0_2 FIXHR(0.51544730992262454697/2) | ||
36 | #define COS0_3 FIXHR(0.53104259108978417447/2) | ||
37 | #define COS0_4 FIXHR(0.55310389603444452782/2) | ||
38 | #define COS0_5 FIXHR(0.58293496820613387367/2) | ||
39 | #define COS0_6 FIXHR(0.62250412303566481615/2) | ||
40 | #define COS0_7 FIXHR(0.67480834145500574602/2) | ||
41 | #define COS0_8 FIXHR(0.74453627100229844977/2) | ||
42 | #define COS0_9 FIXHR(0.83934964541552703873/2) | ||
43 | #define COS0_10 FIXHR(0.97256823786196069369/2) | ||
44 | #define COS0_11 FIXHR(1.16943993343288495515/4) | ||
45 | #define COS0_12 FIXHR(1.48416461631416627724/4) | ||
46 | #define COS0_13 FIXHR(2.05778100995341155085/8) | ||
47 | #define COS0_14 FIXHR(3.40760841846871878570/8) | ||
48 | #define COS0_15 FIXHR(10.19000812354805681150/32) | ||
49 | |||
50 | #define COS1_0 FIXHR(0.50241928618815570551/2) | ||
51 | #define COS1_1 FIXHR(0.52249861493968888062/2) | ||
52 | #define COS1_2 FIXHR(0.56694403481635770368/2) | ||
53 | #define COS1_3 FIXHR(0.64682178335999012954/2) | ||
54 | #define COS1_4 FIXHR(0.78815462345125022473/2) | ||
55 | #define COS1_5 FIXHR(1.06067768599034747134/4) | ||
56 | #define COS1_6 FIXHR(1.72244709823833392782/4) | ||
57 | #define COS1_7 FIXHR(5.10114861868916385802/16) | ||
58 | |||
59 | #define COS2_0 FIXHR(0.50979557910415916894/2) | ||
60 | #define COS2_1 FIXHR(0.60134488693504528054/2) | ||
61 | #define COS2_2 FIXHR(0.89997622313641570463/2) | ||
62 | #define COS2_3 FIXHR(2.56291544774150617881/8) | ||
63 | |||
64 | #define COS3_0 FIXHR(0.54119610014619698439/2) | ||
65 | #define COS3_1 FIXHR(1.30656296487637652785/4) | ||
66 | |||
67 | #define COS4_0 FIXHR(0.70710678118654752439/2) | ||
68 | |||
69 | /* butterfly operator */ | ||
70 | #define BF(a, b, c, s)\ | ||
71 | {\ | ||
72 | tmp0 = val##a + val##b;\ | ||
73 | tmp1 = val##a - val##b;\ | ||
74 | val##a = tmp0;\ | ||
75 | val##b = MULH3(tmp1, c, 1<<(s));\ | ||
76 | } | ||
77 | |||
78 | #define BF0(a, b, c, s)\ | ||
79 | {\ | ||
80 | tmp0 = tab[a] + tab[b];\ | ||
81 | tmp1 = tab[a] - tab[b];\ | ||
82 | val##a = tmp0;\ | ||
83 | val##b = MULH3(tmp1, c, 1<<(s));\ | ||
84 | } | ||
85 | |||
86 | #define BF1(a, b, c, d)\ | ||
87 | {\ | ||
88 | BF(a, b, COS4_0, 1);\ | ||
89 | BF(c, d,-COS4_0, 1);\ | ||
90 | val##c += val##d;\ | ||
91 | } | ||
92 | |||
93 | #define BF2(a, b, c, d)\ | ||
94 | {\ | ||
95 | BF(a, b, COS4_0, 1);\ | ||
96 | BF(c, d,-COS4_0, 1);\ | ||
97 | val##c += val##d;\ | ||
98 | val##a += val##c;\ | ||
99 | val##c += val##b;\ | ||
100 | val##b += val##d;\ | ||
101 | } | ||
102 | |||
103 | #define ADD(a, b) val##a += val##b | ||
104 | |||
105 | /* DCT32 without 1/sqrt(2) coef zero scaling. */ | ||
106 | static void dct32(INTFLOAT *out, const INTFLOAT *tab) | ||
107 | { | ||
108 | INTFLOAT tmp0, tmp1; | ||
109 | |||
110 | INTFLOAT val0 , val1 , val2 , val3 , val4 , val5 , val6 , val7 , | ||
111 | val8 , val9 , val10, val11, val12, val13, val14, val15, | ||
112 | val16, val17, val18, val19, val20, val21, val22, val23, | ||
113 | val24, val25, val26, val27, val28, val29, val30, val31; | ||
114 | |||
115 | /* pass 1 */ | ||
116 | BF0( 0, 31, COS0_0 , 1); | ||
117 | BF0(15, 16, COS0_15, 5); | ||
118 | /* pass 2 */ | ||
119 | BF( 0, 15, COS1_0 , 1); | ||
120 | BF(16, 31,-COS1_0 , 1); | ||
121 | /* pass 1 */ | ||
122 | BF0( 7, 24, COS0_7 , 1); | ||
123 | BF0( 8, 23, COS0_8 , 1); | ||
124 | /* pass 2 */ | ||
125 | BF( 7, 8, COS1_7 , 4); | ||
126 | BF(23, 24,-COS1_7 , 4); | ||
127 | /* pass 3 */ | ||
128 | BF( 0, 7, COS2_0 , 1); | ||
129 | BF( 8, 15,-COS2_0 , 1); | ||
130 | BF(16, 23, COS2_0 , 1); | ||
131 | BF(24, 31,-COS2_0 , 1); | ||
132 | /* pass 1 */ | ||
133 | BF0( 3, 28, COS0_3 , 1); | ||
134 | BF0(12, 19, COS0_12, 2); | ||
135 | /* pass 2 */ | ||
136 | BF( 3, 12, COS1_3 , 1); | ||
137 | BF(19, 28,-COS1_3 , 1); | ||
138 | /* pass 1 */ | ||
139 | BF0( 4, 27, COS0_4 , 1); | ||
140 | BF0(11, 20, COS0_11, 2); | ||
141 | /* pass 2 */ | ||
142 | BF( 4, 11, COS1_4 , 1); | ||
143 | BF(20, 27,-COS1_4 , 1); | ||
144 | /* pass 3 */ | ||
145 | BF( 3, 4, COS2_3 , 3); | ||
146 | BF(11, 12,-COS2_3 , 3); | ||
147 | BF(19, 20, COS2_3 , 3); | ||
148 | BF(27, 28,-COS2_3 , 3); | ||
149 | /* pass 4 */ | ||
150 | BF( 0, 3, COS3_0 , 1); | ||
151 | BF( 4, 7,-COS3_0 , 1); | ||
152 | BF( 8, 11, COS3_0 , 1); | ||
153 | BF(12, 15,-COS3_0 , 1); | ||
154 | BF(16, 19, COS3_0 , 1); | ||
155 | BF(20, 23,-COS3_0 , 1); | ||
156 | BF(24, 27, COS3_0 , 1); | ||
157 | BF(28, 31,-COS3_0 , 1); | ||
158 | |||
159 | |||
160 | |||
161 | /* pass 1 */ | ||
162 | BF0( 1, 30, COS0_1 , 1); | ||
163 | BF0(14, 17, COS0_14, 3); | ||
164 | /* pass 2 */ | ||
165 | BF( 1, 14, COS1_1 , 1); | ||
166 | BF(17, 30,-COS1_1 , 1); | ||
167 | /* pass 1 */ | ||
168 | BF0( 6, 25, COS0_6 , 1); | ||
169 | BF0( 9, 22, COS0_9 , 1); | ||
170 | /* pass 2 */ | ||
171 | BF( 6, 9, COS1_6 , 2); | ||
172 | BF(22, 25,-COS1_6 , 2); | ||
173 | /* pass 3 */ | ||
174 | BF( 1, 6, COS2_1 , 1); | ||
175 | BF( 9, 14,-COS2_1 , 1); | ||
176 | BF(17, 22, COS2_1 , 1); | ||
177 | BF(25, 30,-COS2_1 , 1); | ||
178 | |||
179 | /* pass 1 */ | ||
180 | BF0( 2, 29, COS0_2 , 1); | ||
181 | BF0(13, 18, COS0_13, 3); | ||
182 | /* pass 2 */ | ||
183 | BF( 2, 13, COS1_2 , 1); | ||
184 | BF(18, 29,-COS1_2 , 1); | ||
185 | /* pass 1 */ | ||
186 | BF0( 5, 26, COS0_5 , 1); | ||
187 | BF0(10, 21, COS0_10, 1); | ||
188 | /* pass 2 */ | ||
189 | BF( 5, 10, COS1_5 , 2); | ||
190 | BF(21, 26,-COS1_5 , 2); | ||
191 | /* pass 3 */ | ||
192 | BF( 2, 5, COS2_2 , 1); | ||
193 | BF(10, 13,-COS2_2 , 1); | ||
194 | BF(18, 21, COS2_2 , 1); | ||
195 | BF(26, 29,-COS2_2 , 1); | ||
196 | /* pass 4 */ | ||
197 | BF( 1, 2, COS3_1 , 2); | ||
198 | BF( 5, 6,-COS3_1 , 2); | ||
199 | BF( 9, 10, COS3_1 , 2); | ||
200 | BF(13, 14,-COS3_1 , 2); | ||
201 | BF(17, 18, COS3_1 , 2); | ||
202 | BF(21, 22,-COS3_1 , 2); | ||
203 | BF(25, 26, COS3_1 , 2); | ||
204 | BF(29, 30,-COS3_1 , 2); | ||
205 | |||
206 | /* pass 5 */ | ||
207 | BF1( 0, 1, 2, 3); | ||
208 | BF2( 4, 5, 6, 7); | ||
209 | BF1( 8, 9, 10, 11); | ||
210 | BF2(12, 13, 14, 15); | ||
211 | BF1(16, 17, 18, 19); | ||
212 | BF2(20, 21, 22, 23); | ||
213 | BF1(24, 25, 26, 27); | ||
214 | BF2(28, 29, 30, 31); | ||
215 | |||
216 | /* pass 6 */ | ||
217 | |||
218 | ADD( 8, 12); | ||
219 | ADD(12, 10); | ||
220 | ADD(10, 14); | ||
221 | ADD(14, 9); | ||
222 | ADD( 9, 13); | ||
223 | ADD(13, 11); | ||
224 | ADD(11, 15); | ||
225 | |||
226 | out[ 0] = val0; | ||
227 | out[16] = val1; | ||
228 | out[ 8] = val2; | ||
229 | out[24] = val3; | ||
230 | out[ 4] = val4; | ||
231 | out[20] = val5; | ||
232 | out[12] = val6; | ||
233 | out[28] = val7; | ||
234 | out[ 2] = val8; | ||
235 | out[18] = val9; | ||
236 | out[10] = val10; | ||
237 | out[26] = val11; | ||
238 | out[ 6] = val12; | ||
239 | out[22] = val13; | ||
240 | out[14] = val14; | ||
241 | out[30] = val15; | ||
242 | |||
243 | ADD(24, 28); | ||
244 | ADD(28, 26); | ||
245 | ADD(26, 30); | ||
246 | ADD(30, 25); | ||
247 | ADD(25, 29); | ||
248 | ADD(29, 27); | ||
249 | ADD(27, 31); | ||
250 | |||
251 | out[ 1] = val16 + val24; | ||
252 | out[17] = val17 + val25; | ||
253 | out[ 9] = val18 + val26; | ||
254 | out[25] = val19 + val27; | ||
255 | out[ 5] = val20 + val28; | ||
256 | out[21] = val21 + val29; | ||
257 | out[13] = val22 + val30; | ||
258 | out[29] = val23 + val31; | ||
259 | out[ 3] = val24 + val20; | ||
260 | out[19] = val25 + val21; | ||
261 | out[11] = val26 + val22; | ||
262 | out[27] = val27 + val23; | ||
263 | out[ 7] = val28 + val18; | ||
264 | out[23] = val29 + val19; | ||
265 | out[15] = val30 + val17; | ||
266 | out[31] = val31; | ||
267 | } | ||