root / hw / adlib.c @ ee0ea1d0
History | View | Annotate | Download (7.6 kB)
1 |
/*
|
---|---|
2 |
* QEMU Proxy for OPL2/3 emulation by MAME team
|
3 |
*
|
4 |
* Copyright (c) 2004-2005 Vassili Karpov (malc)
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include <assert.h> |
25 |
#include "vl.h" |
26 |
|
27 |
#define ADLIB_KILL_TIMERS 1 |
28 |
|
29 |
#define dolog(...) AUD_log ("adlib", __VA_ARGS__) |
30 |
#ifdef DEBUG
|
31 |
#define ldebug(...) dolog (__VA_ARGS__)
|
32 |
#else
|
33 |
#define ldebug(...)
|
34 |
#endif
|
35 |
|
36 |
#ifdef HAS_YMF262
|
37 |
#include "ymf262.h" |
38 |
void YMF262UpdateOneQEMU (int which, INT16 *dst, int length); |
39 |
#define SHIFT 2 |
40 |
#else
|
41 |
#include "fmopl.h" |
42 |
#define SHIFT 1 |
43 |
#endif
|
44 |
|
45 |
#define IO_READ_PROTO(name) \
|
46 |
uint32_t name (void *opaque, uint32_t nport)
|
47 |
#define IO_WRITE_PROTO(name) \
|
48 |
void name (void *opaque, uint32_t nport, uint32_t val) |
49 |
|
50 |
static struct { |
51 |
int port;
|
52 |
int freq;
|
53 |
} conf = {0x220, 44100}; |
54 |
|
55 |
typedef struct { |
56 |
QEMUSoundCard card; |
57 |
int ticking[2]; |
58 |
int enabled;
|
59 |
int active;
|
60 |
int bufpos;
|
61 |
#ifdef DEBUG
|
62 |
int64_t exp[2];
|
63 |
#endif
|
64 |
int16_t *mixbuf; |
65 |
uint64_t dexp[2];
|
66 |
SWVoiceOut *voice; |
67 |
int left, pos, samples;
|
68 |
QEMUAudioTimeStamp ats; |
69 |
#ifndef HAS_YMF262
|
70 |
FM_OPL *opl; |
71 |
#endif
|
72 |
} AdlibState; |
73 |
|
74 |
static AdlibState glob_adlib;
|
75 |
|
76 |
static void adlib_stop_opl_timer (AdlibState *s, size_t n) |
77 |
{ |
78 |
#ifdef HAS_YMF262
|
79 |
YMF262TimerOver (0, n);
|
80 |
#else
|
81 |
OPLTimerOver (s->opl, n); |
82 |
#endif
|
83 |
s->ticking[n] = 0;
|
84 |
} |
85 |
|
86 |
static void adlib_kill_timers (AdlibState *s) |
87 |
{ |
88 |
size_t i; |
89 |
|
90 |
for (i = 0; i < 2; ++i) { |
91 |
if (s->ticking[i]) {
|
92 |
uint64_t delta; |
93 |
|
94 |
delta = AUD_get_elapsed_usec_out (s->voice, &s->ats); |
95 |
ldebug ( |
96 |
"delta = %f dexp = %f expired => %d\n",
|
97 |
delta / 1000000.0, |
98 |
s->dexp[i] / 1000000.0, |
99 |
delta >= s->dexp[i] |
100 |
); |
101 |
if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) {
|
102 |
adlib_stop_opl_timer (s, i); |
103 |
AUD_init_time_stamp_out (s->voice, &s->ats); |
104 |
} |
105 |
} |
106 |
} |
107 |
} |
108 |
|
109 |
static IO_WRITE_PROTO(adlib_write)
|
110 |
{ |
111 |
AdlibState *s = opaque; |
112 |
int a = nport & 3; |
113 |
int status;
|
114 |
|
115 |
s->active = 1;
|
116 |
AUD_set_active_out (s->voice, 1);
|
117 |
|
118 |
adlib_kill_timers (s); |
119 |
|
120 |
#ifdef HAS_YMF262
|
121 |
status = YMF262Write (0, a, val);
|
122 |
#else
|
123 |
status = OPLWrite (s->opl, a, val); |
124 |
#endif
|
125 |
} |
126 |
|
127 |
static IO_READ_PROTO(adlib_read)
|
128 |
{ |
129 |
AdlibState *s = opaque; |
130 |
uint8_t data; |
131 |
int a = nport & 3; |
132 |
|
133 |
adlib_kill_timers (s); |
134 |
|
135 |
#ifdef HAS_YMF262
|
136 |
data = YMF262Read (0, a);
|
137 |
#else
|
138 |
data = OPLRead (s->opl, a); |
139 |
#endif
|
140 |
return data;
|
141 |
} |
142 |
|
143 |
static void timer_handler (int c, double interval_Sec) |
144 |
{ |
145 |
AdlibState *s = &glob_adlib; |
146 |
unsigned n = c & 1; |
147 |
#ifdef DEBUG
|
148 |
double interval;
|
149 |
int64_t exp; |
150 |
#endif
|
151 |
|
152 |
if (interval_Sec == 0.0) { |
153 |
s->ticking[n] = 0;
|
154 |
return;
|
155 |
} |
156 |
|
157 |
s->ticking[n] = 1;
|
158 |
#ifdef DEBUG
|
159 |
interval = ticks_per_sec * interval_Sec; |
160 |
exp = qemu_get_clock (vm_clock) + interval; |
161 |
s->exp[n] = exp; |
162 |
#endif
|
163 |
|
164 |
s->dexp[n] = interval_Sec * 1000000.0; |
165 |
AUD_init_time_stamp_out (s->voice, &s->ats); |
166 |
} |
167 |
|
168 |
static int write_audio (AdlibState *s, int samples) |
169 |
{ |
170 |
int net = 0; |
171 |
int pos = s->pos;
|
172 |
|
173 |
while (samples) {
|
174 |
int nbytes, wbytes, wsampl;
|
175 |
|
176 |
nbytes = samples << SHIFT; |
177 |
wbytes = AUD_write ( |
178 |
s->voice, |
179 |
s->mixbuf + (pos << (SHIFT - 1)),
|
180 |
nbytes |
181 |
); |
182 |
|
183 |
if (wbytes) {
|
184 |
wsampl = wbytes >> SHIFT; |
185 |
|
186 |
samples -= wsampl; |
187 |
pos = (pos + wsampl) % s->samples; |
188 |
|
189 |
net += wsampl; |
190 |
} |
191 |
else {
|
192 |
break;
|
193 |
} |
194 |
} |
195 |
|
196 |
return net;
|
197 |
} |
198 |
|
199 |
static void adlib_callback (void *opaque, int free) |
200 |
{ |
201 |
AdlibState *s = opaque; |
202 |
int samples, net = 0, to_play, written; |
203 |
|
204 |
samples = free >> SHIFT; |
205 |
if (!(s->active && s->enabled) || !samples) {
|
206 |
return;
|
207 |
} |
208 |
|
209 |
to_play = audio_MIN (s->left, samples); |
210 |
while (to_play) {
|
211 |
written = write_audio (s, to_play); |
212 |
|
213 |
if (written) {
|
214 |
s->left -= written; |
215 |
samples -= written; |
216 |
to_play -= written; |
217 |
s->pos = (s->pos + written) % s->samples; |
218 |
} |
219 |
else {
|
220 |
return;
|
221 |
} |
222 |
} |
223 |
|
224 |
samples = audio_MIN (samples, s->samples - s->pos); |
225 |
if (!samples) {
|
226 |
return;
|
227 |
} |
228 |
|
229 |
#ifdef HAS_YMF262
|
230 |
YMF262UpdateOneQEMU (0, s->mixbuf + s->pos * 2, samples); |
231 |
#else
|
232 |
YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples); |
233 |
#endif
|
234 |
|
235 |
while (samples) {
|
236 |
written = write_audio (s, samples); |
237 |
|
238 |
if (written) {
|
239 |
net += written; |
240 |
samples -= written; |
241 |
s->pos = (s->pos + written) % s->samples; |
242 |
} |
243 |
else {
|
244 |
s->left = samples; |
245 |
return;
|
246 |
} |
247 |
} |
248 |
} |
249 |
|
250 |
static void Adlib_fini (AdlibState *s) |
251 |
{ |
252 |
#ifdef HAS_YMF262
|
253 |
YMF262Shutdown (); |
254 |
#else
|
255 |
if (s->opl) {
|
256 |
OPLDestroy (s->opl); |
257 |
s->opl = NULL;
|
258 |
} |
259 |
#endif
|
260 |
|
261 |
if (s->mixbuf) {
|
262 |
qemu_free (s->mixbuf); |
263 |
} |
264 |
|
265 |
s->active = 0;
|
266 |
s->enabled = 0;
|
267 |
AUD_remove_card (&s->card); |
268 |
} |
269 |
|
270 |
int Adlib_init (AudioState *audio)
|
271 |
{ |
272 |
AdlibState *s = &glob_adlib; |
273 |
audsettings_t as; |
274 |
|
275 |
if (!audio) {
|
276 |
dolog ("No audio state\n");
|
277 |
return -1; |
278 |
} |
279 |
|
280 |
#ifdef HAS_YMF262
|
281 |
if (YMF262Init (1, 14318180, conf.freq)) { |
282 |
dolog ("YMF262Init %d failed\n", conf.freq);
|
283 |
return -1; |
284 |
} |
285 |
else {
|
286 |
YMF262SetTimerHandler (0, timer_handler, 0); |
287 |
s->enabled = 1;
|
288 |
} |
289 |
#else
|
290 |
s->opl = OPLCreate (OPL_TYPE_YM3812, 3579545, conf.freq);
|
291 |
if (!s->opl) {
|
292 |
dolog ("OPLCreate %d failed\n", conf.freq);
|
293 |
return -1; |
294 |
} |
295 |
else {
|
296 |
OPLSetTimerHandler (s->opl, timer_handler, 0);
|
297 |
s->enabled = 1;
|
298 |
} |
299 |
#endif
|
300 |
|
301 |
as.freq = conf.freq; |
302 |
as.nchannels = SHIFT; |
303 |
as.fmt = AUD_FMT_S16; |
304 |
as.endianness = AUDIO_HOST_ENDIANNESS; |
305 |
|
306 |
AUD_register_card (audio, "adlib", &s->card);
|
307 |
|
308 |
s->voice = AUD_open_out ( |
309 |
&s->card, |
310 |
s->voice, |
311 |
"adlib",
|
312 |
s, |
313 |
adlib_callback, |
314 |
&as |
315 |
); |
316 |
if (!s->voice) {
|
317 |
Adlib_fini (s); |
318 |
return -1; |
319 |
} |
320 |
|
321 |
s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT; |
322 |
s->mixbuf = qemu_mallocz (s->samples << SHIFT); |
323 |
|
324 |
if (!s->mixbuf) {
|
325 |
dolog ("Could not allocate mixing buffer, %d samples (each %d bytes)\n",
|
326 |
s->samples, 1 << SHIFT);
|
327 |
Adlib_fini (s); |
328 |
return -1; |
329 |
} |
330 |
|
331 |
register_ioport_read (0x388, 4, 1, adlib_read, s); |
332 |
register_ioport_write (0x388, 4, 1, adlib_write, s); |
333 |
|
334 |
register_ioport_read (conf.port, 4, 1, adlib_read, s); |
335 |
register_ioport_write (conf.port, 4, 1, adlib_write, s); |
336 |
|
337 |
register_ioport_read (conf.port + 8, 2, 1, adlib_read, s); |
338 |
register_ioport_write (conf.port + 8, 2, 1, adlib_write, s); |
339 |
|
340 |
return 0; |
341 |
} |