11 struct dcblock {  struct
20 struct dcblock *dcblock_new(float R, unsigned long sample_rate)  in dcblock_new()  argument
22 	struct dcblock *dcblock = (struct dcblock *)calloc(1, sizeof(*dcblock));  in dcblock_new()  local
23 	dcblock->R = R;  in dcblock_new()
24 	dcblock->ramp_increment = 1000. / (float)(RAMP_TIME_MS * sample_rate);  in dcblock_new()
25 	return dcblock;  in dcblock_new()
28 void dcblock_free(struct dcblock *dcblock)  in dcblock_free()  argument
30 	free(dcblock);  in dcblock_free()
34 void dcblock_process(struct dcblock *dcblock, float *data, int count)  in dcblock_process()  argument
37 	float x_prev = dcblock->x_prev;  in dcblock_process()
38 	float y_prev = dcblock->y_prev;  in dcblock_process()
39 	float R = dcblock->R;  in dcblock_process()
41 	if (!dcblock->initialized) {  in dcblock_process()
43 		dcblock->initialized = 1;  in dcblock_process()
59 		if (dcblock->ramp_factor < 1.0) {  in dcblock_process()
60 			d *= dcblock->ramp_factor;  in dcblock_process()
61 			dcblock->ramp_factor += dcblock->ramp_increment;  in dcblock_process()
66 	dcblock->x_prev = x_prev;  in dcblock_process()
67 	dcblock->y_prev = y_prev;  in dcblock_process()