338 	double bin_power[bin_power_len];  in audio_signal_detect()  local
379 	bin_power[0] = data[0];  in audio_signal_detect()
381 		bin_power[i] = hypot(data[i], data[data_len - i]);  in audio_signal_detect()
383 	bin_power[bin_power_len - 1] = data[data_len / 2];  in audio_signal_detect()
387 		bin_power[i] = 2 * bin_power[i] / data_len;  in audio_signal_detect()
394 		if (bin_power[i] > NOISE_THRESHOLD) {  in audio_signal_detect()
396 				  freq, bin_power[i]);  in audio_signal_detect()
405 		if (isnan(max) || bin_power[i] > max)  in audio_signal_detect()
406 			max = bin_power[i];  in audio_signal_detect()
431 		if (bin_power[i] > threshold)  in audio_signal_detect()
441 		if (bin_power[i] < threshold) {  in audio_signal_detect()
471 		if (bin_power[i] > local_max) {  in audio_signal_detect()
472 			local_max = bin_power[i];  in audio_signal_detect()