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r32105 Saturday 13th September, 2014 at 13:51:34 UTC by Miodrag Milanović
Removed static config in RC filter and small cleanup (nw)

[src/emu/sound]	flt_rc.c flt_rc.h
[src/mame/drivers]	39in1.c

trunk/src/mame/drivers/39in1.c

r32104	r32105
1519	1519	{
1520	1520	int index = 0;
1521	1521
1522		//pxa255_t* pxa255 = pxa255_get_safe_token( device );
1523
1524		//pxa255->iface = device->base_config().static_config();
1525
1526	1522	for(index = 0; index < 16; index++)
1527	1523	{
1528	1524	m_dma_regs.dcsr[index] = 0x00000008;
r32104	r32105
1543	1539	m_lcd_regs.dma[1].eof = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(_39in1_state::pxa255_lcd_dma_eof),this));
1544	1540	m_lcd_regs.trgbr = 0x00aa5500;
1545	1541	m_lcd_regs.tcr = 0x0000754f;
1546
1547		//pxa255_register_state_save(device);
1548	1542	}
1549	1543
1550	1544	void _39in1_state::machine_start()

trunk/src/emu/sound/flt_rc.c

r32104	r32105
2	2	#include "flt_rc.h"
3	3
4	4
5		const flt_rc_config flt_rc_ac_default = {FLT_RC_AC, 10000, 0, 0, CAP_U(1)};
6
7
8	5	// device type definition
9	6	const device_type FILTER_RC = &device_creator<filter_rc_device>;
10	7
r32104	r32105
23	20	m_stream(NULL),
24	21	m_k(0),
25	22	m_memory(0),
26		m_type(0)
	23	m_type(FLT_RC_LOWPASS),
	24	m_R1(1),
	25	m_R2(1),
	26	m_R3(1),
	27	m_C(0)
27	28	{
28	29	}
29	30
r32104	r32105
34	35
35	36	void filter_rc_device::device_start()
36	37	{
37		const flt_rc_config *conf = (const flt_rc_config *)static_config();
38
39	38	m_stream = stream_alloc(1, 1, machine().sample_rate());
40		if (conf)
41		set_RC_info(conf->type, conf->R1, conf->R2, conf->R3, conf->C);
42		else
43		set_RC_info(FLT_RC_LOWPASS, 1, 1, 1, 0);
	39	recalc();
44	40	}
45	41
46	42
r32104	r32105
76	72	}
77	73
78	74
79		void filter_rc_device::set_RC_info(int type, double R1, double R2, double R3, double C)
	75	void filter_rc_device::recalc()
80	76	{
81	77	double Req;
82	78
83		m_type = type;
84
85	79	switch (m_type)
86	80	{
87	81	case FLT_RC_LOWPASS:
88		if (C == 0.0)
	82	if (m_C == 0.0)
89	83	{
90	84	/* filter disabled */
91	85	m_k = 0x10000;
92	86	return;
93	87	}
94		Req = (R1 * (R2 + R3)) / (R1 + R2 + R3);
	88	Req = (m_R1 * (m_R2 + m_R3)) / (m_R1 + m_R2 + m_R3);
95	89	break;
96	90	case FLT_RC_HIGHPASS:
97	91	case FLT_RC_AC:
98		if (C == 0.0)
	92	if (m_C == 0.0)
99	93	{
100	94	/* filter disabled */
101	95	m_k = 0x0;
102	96	m_memory = 0x0;
103	97	return;
104	98	}
105		Req = R1;
	99	Req = m_R1;
106	100	break;
107	101	default:
108	102	fatalerror("filter_rc_setRC: Wrong filter type %d\n", m_type);
r32104	r32105
110	104
111	105	/* Cut Frequency = 1/(2*Pi*Req*C) */
112	106	/* k = (1-(EXP(-TIMEDELTA/RC)))    */
113		m_k = 0x10000 - 0x10000 * (exp(-1 / (Req * C) / machine().sample_rate()));
	107	m_k = 0x10000 - 0x10000 * (exp(-1 / (Req * m_C) / machine().sample_rate()));
114	108	}
115	109
116	110
117	111	void filter_rc_device::filter_rc_set_RC(int type, double R1, double R2, double R3, double C)
118	112	{
119	113	m_stream->update();
120		set_RC_info(type, R1, R2, R3, C);
	114	m_type = type;
	115	m_R1 = R1;
	116	m_R2 = R2;
	117	m_R3 = R3;
	118	m_C = C;
	119	recalc();
121	120	}
	121
	122	void filter_rc_device::static_set_rc(device_t &device, int type, double R1, double R2, double R3, double C)
	123	{
	124	downcast<filter_rc_device &>(device).m_type = type;
	125	downcast<filter_rc_device &>(device).m_R1 = R1;
	126	downcast<filter_rc_device &>(device).m_R2 = R2;
	127	downcast<filter_rc_device &>(device).m_R3 = R3;
	128	downcast<filter_rc_device &>(device).m_C = C;
	129	}

trunk/src/emu/sound/flt_rc.h

r32104	r32105
31	31	* Same as FLT_RC_HIGHPASS, but with standard frequency of 16 HZ
32	32	* This filter may be setup just with
33	33	*
34		* MCFG_SOUND_ADD("tag", FILTER_RC, 0)
35		* MCFG_SOUND_CONFIG(&flt_rc_ac_default)
	34	* MCFG_FILTER_RC_ADD("tag", 0)
	35	* MCFG_FILTER_RC_AC(&flt_rc_ac_default)
36	36	*
37	37	* Default behaviour:
38	38	*
r32104	r32105
46	46
47	47	#define MCFG_FILTER_RC_ADD(_tag, _clock) \
48	48	MCFG_DEVICE_ADD(_tag, FILTER_RC, _clock)
	49
49	50	#define MCFG_FILTER_RC_REPLACE(_tag, _clock) \
50	51	MCFG_DEVICE_REPLACE(_tag, FILTER_RC, _clock)
51	52
	53	#define MCFG_FILTER_RC_AC() \
	54	filter_rc_device::static_set_rc(*device, FLT_RC_AC, 10000, 0, 0, CAP_U(1));
52	55
	56
53	57	//**************************************************************************
54	58	//  TYPE DEFINITIONS
55	59	//**************************************************************************
r32104	r32105
58	62	#define FLT_RC_HIGHPASS     1
59	63	#define FLT_RC_AC           2
60	64
61		struct flt_rc_config
62		{
63		int type;
64		double  R1;
65		double  R2;
66		double  R3;
67		double  C;
68		};
69
70		extern const flt_rc_config flt_rc_ac_default;
71
72
73	65	// ======================> filter_rc_device
74	66
75	67	class filter_rc_device : public device_t,
r32104	r32105
79	71	filter_rc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
80	72	~filter_rc_device() { }
81	73
	74	// static configuration
	75	static void static_set_rc(device_t &device, int type, double R1, double R2, double R3, double C);
	76
82	77	void filter_rc_set_RC(int type, double R1, double R2, double R3, double C);
83	78
84	79	protected:
r32104	r32105
89	84	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
90	85
91	86	private:
92		void set_RC_info(int type, double R1, double R2, double R3, double C);
	87	void recalc();
93	88
94	89	private:
95	90	sound_stream*  m_stream;
96	91	int            m_k;
97	92	int            m_memory;
98	93	int            m_type;
	94	double         m_R1;
	95	double         m_R2;
	96	double         m_R3;
	97	double         m_C;
99	98	};
100	99
101	100	extern const device_type FILTER_RC;
102	101
103
104	102	#endif /* __FLT_RC_H__ */

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