summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/sound/5110intf.c
blob: 6cb4641c2934f46692f1047b01e07e7b2c5251db (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
/******************************************************************************

     TMS5110 interface

     slightly modified from 5220intf by Jarek Burczynski

     Written for MAME by Frank Palazzolo
     With help from Neill Corlett
     Additional tweaking by Aaron Giles

******************************************************************************/

#include <math.h>

#include "sndintrf.h"
#include "streams.h"
#include "tms5110.h"
#include "5110intf.h"


#define MAX_SAMPLE_CHUNK	10000


/* the state of the streamed output */
struct tms5110_info
{
	const struct TMS5110interface *intf;
	sound_stream *stream;
	void *chip;
	INT32 speech_rom_bitnum;
};


/* static function prototypes */
static void tms5110_update(void *param, stream_sample_t **inputs, stream_sample_t **buffer, int length);

static int speech_rom_read_bit(void)
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);
	const UINT8 *table = memory_region(info->intf->rom_region);

	int r;

	if (info->speech_rom_bitnum<0)
		r = 0;
	else
		r = (table[info->speech_rom_bitnum >> 3] >> (0x07 - (info->speech_rom_bitnum & 0x07))) & 1;

	info->speech_rom_bitnum++;

	return r;
}

static void speech_rom_set_addr(int addr)
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);

	info->speech_rom_bitnum = addr * 8 - 1;
}

/******************************************************************************

     tms5110_start -- allocate buffers and reset the 5110

******************************************************************************/

static void *tms5110_start(int sndindex, int clock, const void *config)
{
	static const struct TMS5110interface dummy = { TMS5110_IS_5110A, -1 };
	struct tms5110_info *info;

	info = auto_malloc(sizeof(*info));
	memset(info, 0, sizeof(*info));
	info->intf = config ? config : &dummy;

	info->chip = tms5110_create(sndindex, info->intf->variant);
	if (!info->chip)
		return NULL;
	sndintrf_register_token(info);

	/* initialize a stream */
	info->stream = stream_create(0, 1, clock / 80, info, tms5110_update);

	if (info->intf->rom_region == -1 )
	{
	    if (info->intf->M0_callback==NULL)
	    {
			logerror("\n file: 5110intf.c, tms5110_start(), line 53:\n  Missing _mandatory_ 'M0_callback' function pointer in the TMS5110 interface\n  This function is used by TMS5110 to call for a single bits\n  needed to generate the speech\n  Aborting startup...\n");
			return NULL;
	    }
	    tms5110_set_M0_callback(info->chip, info->intf->M0_callback );
	    tms5110_set_load_address(info->chip, info->intf->load_address );
	}
	else
	{
	    tms5110_set_M0_callback(info->chip, speech_rom_read_bit );
	    tms5110_set_load_address(info->chip, speech_rom_set_addr );
	}

    /* reset the 5110 */
    tms5110_reset_chip(info->chip);

    /* request a sound channel */
    return info;
}



/******************************************************************************

     tms5110_stop -- free buffers

******************************************************************************/

static void tms5110_stop(void *chip)
{
	struct tms5110_info *info = chip;
	tms5110_destroy(info->chip);
}


static void tms5110_reset(void *chip)
{
	struct tms5110_info *info = chip;
	tms5110_reset_chip(info->chip);
}



/******************************************************************************

     tms5110_CTL_w -- write Control Command to the sound chip
commands like Speech, Reset, etc., are loaded into the chip via the CTL pins

******************************************************************************/

WRITE8_HANDLER( tms5110_CTL_w )
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);

    /* bring up to date first */
    stream_update(info->stream);
    tms5110_CTL_set(info->chip, data);
}

/******************************************************************************

     tms5110_PDC_w -- write to PDC pin on the sound chip

******************************************************************************/

WRITE8_HANDLER( tms5110_PDC_w )
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);

    /* bring up to date first */
    stream_update(info->stream);
    tms5110_PDC_set(info->chip, data);
}



/******************************************************************************

     tms5110_status_r -- read status from the sound chip

******************************************************************************/

READ8_HANDLER( tms5110_status_r )
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);

    /* bring up to date first */
    stream_update(info->stream);
    return tms5110_status_read(info->chip);
}



/******************************************************************************

     tms5110_ready_r -- return the not ready status from the sound chip

******************************************************************************/

int tms5110_ready_r(void)
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);

    /* bring up to date first */
    stream_update(info->stream);
    return tms5110_ready_read(info->chip);
}



/******************************************************************************

     tms5110_update -- update the sound chip so that it is in sync with CPU execution

******************************************************************************/

static void tms5110_update(void *param, stream_sample_t **inputs, stream_sample_t **_buffer, int length)
{
	struct tms5110_info *info = param;
	INT16 sample_data[MAX_SAMPLE_CHUNK];
	stream_sample_t *buffer = _buffer[0];

	/* loop while we still have samples to generate */
	while (length)
	{
		int samples = (length > MAX_SAMPLE_CHUNK) ? MAX_SAMPLE_CHUNK : length;
		int index;

		/* generate the samples and copy to the target buffer */
		tms5110_process(info->chip, sample_data, samples);
		for (index = 0; index < samples; index++)
			*buffer++ = sample_data[index];

		/* account for the samples */
		length -= samples;
	}
}



/******************************************************************************

     tms5110_set_frequency -- adjusts the playback frequency

******************************************************************************/

void tms5110_set_frequency(int frequency)
{
	struct tms5110_info *info = sndti_token(SOUND_TMS5110, 0);
	stream_set_sample_rate(info->stream, frequency / 80);
}




/**************************************************************************
 * Generic get_info
 **************************************************************************/

static void tms5110_set_info(void *token, UINT32 state, sndinfo *info)
{
	switch (state)
	{
		/* no parameters to set */
	}
}


void tms5110_get_info(void *token, UINT32 state, sndinfo *info)
{
	switch (state)
	{
		/* --- the following bits of info are returned as 64-bit signed integers --- */

		/* --- the following bits of info are returned as pointers to data or functions --- */
		case SNDINFO_PTR_SET_INFO:						info->set_info = tms5110_set_info;		break;
		case SNDINFO_PTR_START:							info->start = tms5110_start;			break;
		case SNDINFO_PTR_STOP:							info->stop = tms5110_stop;				break;
		case SNDINFO_PTR_RESET:							info->reset = tms5110_reset;			break;

		/* --- the following bits of info are returned as NULL-terminated strings --- */
		case SNDINFO_STR_NAME:							info->s = "TMS5110";					break;
		case SNDINFO_STR_CORE_FAMILY:					info->s = "TI Speech";					break;
		case SNDINFO_STR_CORE_VERSION:					info->s = "1.0";						break;
		case SNDINFO_STR_CORE_FILE:						info->s = __FILE__;						break;
		case SNDINFO_STR_CORE_CREDITS:					info->s = "Copyright (c) 2004, The MAME Team"; break;
	}
}