2  * Use of this source code is governed by a BSD-style license that can be
13 	lr4->b0 = q.b0;  in lr4_set()
14 	lr4->b1 = q.b1;  in lr4_set()
15 	lr4->b2 = q.b2;  in lr4_set()
16 	lr4->a1 = q.a1;  in lr4_set()
17 	lr4->a2 = q.a2;  in lr4_set()
18 	lr4->x1 = 0;  in lr4_set()
19 	lr4->x2 = 0;  in lr4_set()
20 	lr4->y1 = 0;  in lr4_set()
21 	lr4->y2 = 0;  in lr4_set()
22 	lr4->z1 = 0;  in lr4_set()
23 	lr4->z2 = 0;  in lr4_set()
29  * data0 --+-- lp --> data0
31  *         \-- hp --> data1
33 static void lr4_split(struct lr4 *lp, struct lr4 *hp, int count, float *data0,  in lr4_split()  argument
36 	float lx1 = lp->x1;  in lr4_split()
37 	float lx2 = lp->x2;  in lr4_split()
38 	float ly1 = lp->y1;  in lr4_split()
39 	float ly2 = lp->y2;  in lr4_split()
40 	float lz1 = lp->z1;  in lr4_split()
41 	float lz2 = lp->z2;  in lr4_split()
42 	float lb0 = lp->b0;  in lr4_split()
43 	float lb1 = lp->b1;  in lr4_split()
44 	float lb2 = lp->b2;  in lr4_split()
45 	float la1 = lp->a1;  in lr4_split()
46 	float la2 = lp->a2;  in lr4_split()
48 	float hx1 = hp->x1;  in lr4_split()
49 	float hx2 = hp->x2;  in lr4_split()
50 	float hy1 = hp->y1;  in lr4_split()
51 	float hy2 = hp->y2;  in lr4_split()
52 	float hz1 = hp->z1;  in lr4_split()
53 	float hz2 = hp->z2;  in lr4_split()
54 	float hb0 = hp->b0;  in lr4_split()
55 	float hb1 = hp->b1;  in lr4_split()
56 	float hb2 = hp->b2;  in lr4_split()
57 	float ha1 = hp->a1;  in lr4_split()
58 	float ha2 = hp->a2;  in lr4_split()
64 		y = lb0 * x + lb1 * lx1 + lb2 * lx2 - la1 * ly1 - la2 * ly2;  in lr4_split()
65 		z = lb0 * y + lb1 * ly1 + lb2 * ly2 - la1 * lz1 - la2 * lz2;  in lr4_split()
74 		y = hb0 * x + hb1 * hx1 + hb2 * hx2 - ha1 * hy1 - ha2 * hy2;  in lr4_split()
75 		z = hb0 * y + hb1 * hy1 + hb2 * hy2 - ha1 * hz1 - ha2 * hz2;  in lr4_split()
85 	lp->x1 = lx1;  in lr4_split()
86 	lp->x2 = lx2;  in lr4_split()
87 	lp->y1 = ly1;  in lr4_split()
88 	lp->y2 = ly2;  in lr4_split()
89 	lp->z1 = lz1;  in lr4_split()
90 	lp->z2 = lz2;  in lr4_split()
92 	hp->x1 = hx1;  in lr4_split()
93 	hp->x2 = hx2;  in lr4_split()
94 	hp->y1 = hy1;  in lr4_split()
95 	hp->y2 = hy2;  in lr4_split()
96 	hp->z1 = hz1;  in lr4_split()
97 	hp->z2 = hz2;  in lr4_split()
103  * data --+-- lp --+--> data
105  *        \-- hp --/
107 static void lr4_merge(struct lr4 *lp, struct lr4 *hp, int count, float *data)  in lr4_merge()  argument
109 	float lx1 = lp->x1;  in lr4_merge()
110 	float lx2 = lp->x2;  in lr4_merge()
111 	float ly1 = lp->y1;  in lr4_merge()
112 	float ly2 = lp->y2;  in lr4_merge()
113 	float lz1 = lp->z1;  in lr4_merge()
114 	float lz2 = lp->z2;  in lr4_merge()
115 	float lb0 = lp->b0;  in lr4_merge()
116 	float lb1 = lp->b1;  in lr4_merge()
117 	float lb2 = lp->b2;  in lr4_merge()
118 	float la1 = lp->a1;  in lr4_merge()
119 	float la2 = lp->a2;  in lr4_merge()
121 	float hx1 = hp->x1;  in lr4_merge()
122 	float hx2 = hp->x2;  in lr4_merge()
123 	float hy1 = hp->y1;  in lr4_merge()
124 	float hy2 = hp->y2;  in lr4_merge()
125 	float hz1 = hp->z1;  in lr4_merge()
126 	float hz2 = hp->z2;  in lr4_merge()
127 	float hb0 = hp->b0;  in lr4_merge()
128 	float hb1 = hp->b1;  in lr4_merge()
129 	float hb2 = hp->b2;  in lr4_merge()
130 	float ha1 = hp->a1;  in lr4_merge()
131 	float ha2 = hp->a2;  in lr4_merge()
137 		y = lb0 * x + lb1 * lx1 + lb2 * lx2 - la1 * ly1 - la2 * ly2;  in lr4_merge()
138 		z = lb0 * y + lb1 * ly1 + lb2 * ly2 - la1 * lz1 - la2 * lz2;  in lr4_merge()
146 		y = hb0 * x + hb1 * hx1 + hb2 * hx2 - ha1 * hy1 - ha2 * hy2;  in lr4_merge()
147 		z = hb0 * y + hb1 * hy1 + hb2 * hy2 - ha1 * hz1 - ha2 * hz2;  in lr4_merge()
157 	lp->x1 = lx1;  in lr4_merge()
158 	lp->x2 = lx2;  in lr4_merge()
159 	lp->y1 = ly1;  in lr4_merge()
160 	lp->y2 = ly2;  in lr4_merge()
161 	lp->z1 = lz1;  in lr4_merge()
162 	lp->z2 = lz2;  in lr4_merge()
164 	hp->x1 = hx1;  in lr4_merge()
165 	hp->x2 = hx2;  in lr4_merge()
166 	hp->y1 = hy1;  in lr4_merge()
167 	hp->y2 = hy2;  in lr4_merge()
168 	hp->z1 = hz1;  in lr4_merge()
169 	hp->z2 = hz2;  in lr4_merge()
177 		lr4_set(&xo->lp[i], BQ_LOWPASS, f);  in crossover_init()
178 		lr4_set(&xo->hp[i], BQ_HIGHPASS, f);  in crossover_init()
185 	lr4_split(&xo->lp[0], &xo->hp[0], count, data0, data1);  in crossover_process()
186 	lr4_merge(&xo->lp[1], &xo->hp[1], count, data0);  in crossover_process()
187 	lr4_split(&xo->lp[2], &xo->hp[2], count, data1, data2);  in crossover_process()