26 static inline void biquad2_init(struct biquad2_state *bq,  in biquad2_init()  argument
29 	bq->gain = gain;  in biquad2_init()
30 	bq->a1 = a1;  in biquad2_init()
31 	bq->a2 = a2;  in biquad2_init()
32 	bq->b1 = b1;  in biquad2_init()
33 	bq->b2 = b2;  in biquad2_init()
35 	bq->z1 = 0;  in biquad2_init()
36 	bq->z2 = 0;  in biquad2_init()
39 static inline int16_t biquad2(struct biquad2_state *bq, int16_t sample)  in biquad2()  argument
44 	z0 = sample * bq->gain + bq->z1 * bq->a1 + bq->z2 * bq->a2;  in biquad2()
45 	y = z0 + bq->z1 * bq->b1 + bq->z2 * bq->b2;  in biquad2()
47 	bq->z2 = bq->z1;  in biquad2()
48 	bq->z1 = z0 >> 15;  in biquad2()