47 echo_can_disable_detector_init(struct ec_disable_detector_state *det)  in echo_can_disable_detector_init()  argument
52 	biquad2_init(&det->notch,  in echo_can_disable_detector_init()
59 	det->channel_level = 0;  in echo_can_disable_detector_init()
60 	det->notch_level = 0;  in echo_can_disable_detector_init()
61 	det->tone_present = FALSE;  in echo_can_disable_detector_init()
62 	det->tone_cycle_duration = 0;  in echo_can_disable_detector_init()
63 	det->good_cycles = 0;  in echo_can_disable_detector_init()
64 	det->hit = 0;  in echo_can_disable_detector_init()
69 echo_can_disable_detector_update(struct ec_disable_detector_state *det,  in echo_can_disable_detector_update()  argument
74 	notched = biquad2(&det->notch, amp);  in echo_can_disable_detector_update()
81 	det->channel_level += ((abs(amp) - det->channel_level) >> 5);  in echo_can_disable_detector_update()
82 	det->notch_level += ((abs(notched) - det->notch_level) >> 4);  in echo_can_disable_detector_update()
83 	if (det->channel_level > 280) {  in echo_can_disable_detector_update()
86 		if (det->notch_level * 6 < det->channel_level) {  in echo_can_disable_detector_update()
88 			if (!det->tone_present) {  in echo_can_disable_detector_update()
90 				if (det->tone_cycle_duration >= 425 * 8  in echo_can_disable_detector_update()
91 				    && det->tone_cycle_duration <= 475 * 8) {  in echo_can_disable_detector_update()
92 					det->good_cycles++;  in echo_can_disable_detector_update()
93 					if (det->good_cycles > 2)  in echo_can_disable_detector_update()
94 						det->hit = TRUE;  in echo_can_disable_detector_update()
96 				det->tone_cycle_duration = 0;  in echo_can_disable_detector_update()
98 			det->tone_present = TRUE;  in echo_can_disable_detector_update()
100 			det->tone_present = FALSE;  in echo_can_disable_detector_update()
101 		det->tone_cycle_duration++;  in echo_can_disable_detector_update()
103 		det->tone_present = FALSE;  in echo_can_disable_detector_update()
104 		det->tone_cycle_duration = 0;  in echo_can_disable_detector_update()
105 		det->good_cycles = 0;  in echo_can_disable_detector_update()
107 	return det->hit;  in echo_can_disable_detector_update()