17 #define INT_PI			((s32)(3.141592653589 * 32768.0))
20 	 ((float)(((s32)((a) * 100)) % ((s32)((b) * 100))) / 100.0)
22 #define baseband_freq(carrier, srate, tone) ((s32)( \
42 #define FREQ_A2M_CARRIER	((s32)(2.114516 * 32768.0))
43 #define FREQ_A2M_DUAL		((s32)(2.754916 * 32768.0))
44 #define FREQ_A2M_STEREO		((s32)(2.462326 * 32768.0))
46 #define FREQ_EIAJ_CARRIER	((s32)(1.963495 * 32768.0)) /* 5pi/8  */
47 #define FREQ_EIAJ_DUAL		((s32)(2.562118 * 32768.0))
48 #define FREQ_EIAJ_STEREO	((s32)(2.601053 * 32768.0))
50 #define FREQ_BTSC_DUAL		((s32)(1.963495 * 32768.0)) /* 5pi/8  */
51 #define FREQ_BTSC_DUAL_REF	((s32)(1.374446 * 32768.0)) /* 7pi/16 */
53 #define FREQ_BTSC_SAP		((s32)(2.471532 * 32768.0))
54 #define FREQ_BTSC_SAP_REF	((s32)(1.730072 * 32768.0))
57 #define FREQ_NOISE_START	((s32)(0.100000 * 32768.0))
58 #define FREQ_NOISE_END		((s32)(1.200000 * 32768.0))
70 static s32 int_cos(u32 x)  in int_cos()
73 	s32 ret;  in int_cos()
99 	s32 s_prev = 0;  in int_goertzel()
100 	s32 s_prev2 = 0;  in int_goertzel()
101 	s32 coeff = 2 * int_cos(freq);  in int_goertzel()
108 		s32 s = x[i] + ((s64)coeff * s_prev / 32768) - s_prev2;  in int_goertzel()
118 	 * XXX: N must be low enough so that N*N fits in s32.  in int_goertzel()
157 static s32 detect_a2_a2m_eiaj(struct cx88_core *core, s16 x[], u32 N)  in detect_a2_a2m_eiaj()
159 	s32 carrier, stereo, dual, noise;  in detect_a2_a2m_eiaj()
160 	s32 carrier_freq, stereo_freq, dual_freq;  in detect_a2_a2m_eiaj()
161 	s32 ret;  in detect_a2_a2m_eiaj()
224 static s32 detect_btsc(struct cx88_core *core, s16 x[], u32 N)  in detect_btsc()
226 	s32 sap_ref = freq_magnitude(x, N, FREQ_BTSC_SAP_REF);  in detect_btsc()
227 	s32 sap = freq_magnitude(x, N, FREQ_BTSC_SAP);  in detect_btsc()
228 	s32 dual_ref = freq_magnitude(x, N, FREQ_BTSC_DUAL_REF);  in detect_btsc()
229 	s32 dual = freq_magnitude(x, N, FREQ_BTSC_DUAL);  in detect_btsc()
272 s32 cx88_dsp_detect_stereo_sap(struct cx88_core *core)  in cx88_dsp_detect_stereo_sap()
276 	s32 ret = UNSET;  in cx88_dsp_detect_stereo_sap()