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85571bc7 | 1 | /* |
1d14ffa9 FB |
2 | * QEMU Proxy for OPL2/3 emulation by MAME team |
3 | * | |
4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) | |
5 | * | |
85571bc7 FB |
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 | */ | |
1d14ffa9 | 24 | #include <assert.h> |
87ecb68b PB |
25 | #include "hw.h" |
26 | #include "audiodev.h" | |
85571bc7 | 27 | |
1d14ffa9 FB |
28 | #define ADLIB_KILL_TIMERS 1 |
29 | ||
fb065187 FB |
30 | #define dolog(...) AUD_log ("adlib", __VA_ARGS__) |
31 | #ifdef DEBUG | |
32 | #define ldebug(...) dolog (__VA_ARGS__) | |
33 | #else | |
34 | #define ldebug(...) | |
35 | #endif | |
85571bc7 | 36 | |
1d14ffa9 | 37 | #ifdef HAS_YMF262 |
85571bc7 | 38 | #include "ymf262.h" |
1d14ffa9 | 39 | void YMF262UpdateOneQEMU (int which, INT16 *dst, int length); |
85571bc7 FB |
40 | #define SHIFT 2 |
41 | #else | |
42 | #include "fmopl.h" | |
43 | #define SHIFT 1 | |
44 | #endif | |
45 | ||
85571bc7 FB |
46 | #define IO_READ_PROTO(name) \ |
47 | uint32_t name (void *opaque, uint32_t nport) | |
48 | #define IO_WRITE_PROTO(name) \ | |
49 | void name (void *opaque, uint32_t nport, uint32_t val) | |
50 | ||
51 | static struct { | |
52 | int port; | |
53 | int freq; | |
54 | } conf = {0x220, 44100}; | |
55 | ||
56 | typedef struct { | |
c0fe3827 | 57 | QEMUSoundCard card; |
1d14ffa9 | 58 | int ticking[2]; |
85571bc7 FB |
59 | int enabled; |
60 | int active; | |
85571bc7 | 61 | int bufpos; |
1d14ffa9 FB |
62 | #ifdef DEBUG |
63 | int64_t exp[2]; | |
64 | #endif | |
85571bc7 | 65 | int16_t *mixbuf; |
1d14ffa9 FB |
66 | uint64_t dexp[2]; |
67 | SWVoiceOut *voice; | |
68 | int left, pos, samples; | |
69 | QEMUAudioTimeStamp ats; | |
70 | #ifndef HAS_YMF262 | |
85571bc7 FB |
71 | FM_OPL *opl; |
72 | #endif | |
73 | } AdlibState; | |
74 | ||
c0fe3827 | 75 | static AdlibState glob_adlib; |
85571bc7 | 76 | |
1d14ffa9 FB |
77 | static void adlib_stop_opl_timer (AdlibState *s, size_t n) |
78 | { | |
79 | #ifdef HAS_YMF262 | |
80 | YMF262TimerOver (0, n); | |
81 | #else | |
82 | OPLTimerOver (s->opl, n); | |
83 | #endif | |
84 | s->ticking[n] = 0; | |
85 | } | |
86 | ||
87 | static void adlib_kill_timers (AdlibState *s) | |
88 | { | |
89 | size_t i; | |
90 | ||
91 | for (i = 0; i < 2; ++i) { | |
92 | if (s->ticking[i]) { | |
93 | uint64_t delta; | |
94 | ||
c0fe3827 | 95 | delta = AUD_get_elapsed_usec_out (s->voice, &s->ats); |
1d14ffa9 FB |
96 | ldebug ( |
97 | "delta = %f dexp = %f expired => %d\n", | |
98 | delta / 1000000.0, | |
99 | s->dexp[i] / 1000000.0, | |
100 | delta >= s->dexp[i] | |
101 | ); | |
102 | if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) { | |
103 | adlib_stop_opl_timer (s, i); | |
104 | AUD_init_time_stamp_out (s->voice, &s->ats); | |
105 | } | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
85571bc7 FB |
110 | static IO_WRITE_PROTO(adlib_write) |
111 | { | |
112 | AdlibState *s = opaque; | |
113 | int a = nport & 3; | |
114 | int status; | |
115 | ||
85571bc7 | 116 | s->active = 1; |
1d14ffa9 | 117 | AUD_set_active_out (s->voice, 1); |
85571bc7 | 118 | |
1d14ffa9 FB |
119 | adlib_kill_timers (s); |
120 | ||
121 | #ifdef HAS_YMF262 | |
85571bc7 FB |
122 | status = YMF262Write (0, a, val); |
123 | #else | |
124 | status = OPLWrite (s->opl, a, val); | |
125 | #endif | |
126 | } | |
127 | ||
128 | static IO_READ_PROTO(adlib_read) | |
129 | { | |
130 | AdlibState *s = opaque; | |
131 | uint8_t data; | |
132 | int a = nport & 3; | |
133 | ||
1d14ffa9 FB |
134 | adlib_kill_timers (s); |
135 | ||
136 | #ifdef HAS_YMF262 | |
85571bc7 FB |
137 | data = YMF262Read (0, a); |
138 | #else | |
139 | data = OPLRead (s->opl, a); | |
140 | #endif | |
141 | return data; | |
142 | } | |
143 | ||
1d14ffa9 | 144 | static void timer_handler (int c, double interval_Sec) |
85571bc7 | 145 | { |
c0fe3827 | 146 | AdlibState *s = &glob_adlib; |
1d14ffa9 FB |
147 | unsigned n = c & 1; |
148 | #ifdef DEBUG | |
149 | double interval; | |
c0fe3827 | 150 | int64_t exp; |
85571bc7 | 151 | #endif |
85571bc7 | 152 | |
85571bc7 | 153 | if (interval_Sec == 0.0) { |
1d14ffa9 | 154 | s->ticking[n] = 0; |
85571bc7 FB |
155 | return; |
156 | } | |
1d14ffa9 FB |
157 | |
158 | s->ticking[n] = 1; | |
159 | #ifdef DEBUG | |
160 | interval = ticks_per_sec * interval_Sec; | |
161 | exp = qemu_get_clock (vm_clock) + interval; | |
162 | s->exp[n] = exp; | |
163 | #endif | |
164 | ||
165 | s->dexp[n] = interval_Sec * 1000000.0; | |
166 | AUD_init_time_stamp_out (s->voice, &s->ats); | |
85571bc7 FB |
167 | } |
168 | ||
169 | static int write_audio (AdlibState *s, int samples) | |
170 | { | |
171 | int net = 0; | |
1d14ffa9 FB |
172 | int pos = s->pos; |
173 | ||
85571bc7 | 174 | while (samples) { |
1d14ffa9 FB |
175 | int nbytes, wbytes, wsampl; |
176 | ||
177 | nbytes = samples << SHIFT; | |
178 | wbytes = AUD_write ( | |
179 | s->voice, | |
180 | s->mixbuf + (pos << (SHIFT - 1)), | |
181 | nbytes | |
182 | ); | |
183 | ||
184 | if (wbytes) { | |
185 | wsampl = wbytes >> SHIFT; | |
186 | ||
187 | samples -= wsampl; | |
188 | pos = (pos + wsampl) % s->samples; | |
189 | ||
190 | net += wsampl; | |
191 | } | |
192 | else { | |
85571bc7 | 193 | break; |
1d14ffa9 | 194 | } |
85571bc7 | 195 | } |
1d14ffa9 | 196 | |
85571bc7 FB |
197 | return net; |
198 | } | |
199 | ||
1d14ffa9 | 200 | static void adlib_callback (void *opaque, int free) |
85571bc7 FB |
201 | { |
202 | AdlibState *s = opaque; | |
1d14ffa9 | 203 | int samples, net = 0, to_play, written; |
85571bc7 | 204 | |
1d14ffa9 FB |
205 | samples = free >> SHIFT; |
206 | if (!(s->active && s->enabled) || !samples) { | |
207 | return; | |
85571bc7 | 208 | } |
85571bc7 | 209 | |
1d14ffa9 FB |
210 | to_play = audio_MIN (s->left, samples); |
211 | while (to_play) { | |
212 | written = write_audio (s, to_play); | |
213 | ||
214 | if (written) { | |
215 | s->left -= written; | |
216 | samples -= written; | |
217 | to_play -= written; | |
218 | s->pos = (s->pos + written) % s->samples; | |
219 | } | |
220 | else { | |
221 | return; | |
222 | } | |
223 | } | |
85571bc7 FB |
224 | |
225 | samples = audio_MIN (samples, s->samples - s->pos); | |
1d14ffa9 FB |
226 | if (!samples) { |
227 | return; | |
228 | } | |
85571bc7 | 229 | |
1d14ffa9 | 230 | #ifdef HAS_YMF262 |
85571bc7 FB |
231 | YMF262UpdateOneQEMU (0, s->mixbuf + s->pos * 2, samples); |
232 | #else | |
233 | YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples); | |
234 | #endif | |
235 | ||
236 | while (samples) { | |
1d14ffa9 FB |
237 | written = write_audio (s, samples); |
238 | ||
239 | if (written) { | |
240 | net += written; | |
241 | samples -= written; | |
242 | s->pos = (s->pos + written) % s->samples; | |
243 | } | |
244 | else { | |
245 | s->left = samples; | |
246 | return; | |
247 | } | |
85571bc7 | 248 | } |
85571bc7 FB |
249 | } |
250 | ||
251 | static void Adlib_fini (AdlibState *s) | |
252 | { | |
1d14ffa9 | 253 | #ifdef HAS_YMF262 |
85571bc7 FB |
254 | YMF262Shutdown (); |
255 | #else | |
256 | if (s->opl) { | |
257 | OPLDestroy (s->opl); | |
258 | s->opl = NULL; | |
259 | } | |
260 | #endif | |
261 | ||
1d14ffa9 FB |
262 | if (s->mixbuf) { |
263 | qemu_free (s->mixbuf); | |
264 | } | |
85571bc7 FB |
265 | |
266 | s->active = 0; | |
267 | s->enabled = 0; | |
c0fe3827 | 268 | AUD_remove_card (&s->card); |
85571bc7 FB |
269 | } |
270 | ||
d537cf6c | 271 | int Adlib_init (AudioState *audio, qemu_irq *pic) |
85571bc7 | 272 | { |
c0fe3827 FB |
273 | AdlibState *s = &glob_adlib; |
274 | audsettings_t as; | |
275 | ||
276 | if (!audio) { | |
277 | dolog ("No audio state\n"); | |
278 | return -1; | |
279 | } | |
85571bc7 | 280 | |
1d14ffa9 | 281 | #ifdef HAS_YMF262 |
85571bc7 FB |
282 | if (YMF262Init (1, 14318180, conf.freq)) { |
283 | dolog ("YMF262Init %d failed\n", conf.freq); | |
c0fe3827 | 284 | return -1; |
85571bc7 FB |
285 | } |
286 | else { | |
1d14ffa9 | 287 | YMF262SetTimerHandler (0, timer_handler, 0); |
85571bc7 FB |
288 | s->enabled = 1; |
289 | } | |
290 | #else | |
291 | s->opl = OPLCreate (OPL_TYPE_YM3812, 3579545, conf.freq); | |
292 | if (!s->opl) { | |
293 | dolog ("OPLCreate %d failed\n", conf.freq); | |
c0fe3827 | 294 | return -1; |
85571bc7 FB |
295 | } |
296 | else { | |
1d14ffa9 | 297 | OPLSetTimerHandler (s->opl, timer_handler, 0); |
85571bc7 FB |
298 | s->enabled = 1; |
299 | } | |
300 | #endif | |
301 | ||
c0fe3827 FB |
302 | as.freq = conf.freq; |
303 | as.nchannels = SHIFT; | |
304 | as.fmt = AUD_FMT_S16; | |
d929eba5 | 305 | as.endianness = AUDIO_HOST_ENDIANNESS; |
c0fe3827 FB |
306 | |
307 | AUD_register_card (audio, "adlib", &s->card); | |
308 | ||
1d14ffa9 | 309 | s->voice = AUD_open_out ( |
c0fe3827 | 310 | &s->card, |
1d14ffa9 FB |
311 | s->voice, |
312 | "adlib", | |
313 | s, | |
314 | adlib_callback, | |
d929eba5 | 315 | &as |
1d14ffa9 | 316 | ); |
85571bc7 FB |
317 | if (!s->voice) { |
318 | Adlib_fini (s); | |
c0fe3827 | 319 | return -1; |
85571bc7 FB |
320 | } |
321 | ||
1d14ffa9 | 322 | s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT; |
85571bc7 FB |
323 | s->mixbuf = qemu_mallocz (s->samples << SHIFT); |
324 | ||
325 | if (!s->mixbuf) { | |
546754dc FB |
326 | dolog ("Could not allocate mixing buffer, %d samples (each %d bytes)\n", |
327 | s->samples, 1 << SHIFT); | |
85571bc7 | 328 | Adlib_fini (s); |
c0fe3827 | 329 | return -1; |
85571bc7 | 330 | } |
1d14ffa9 | 331 | |
85571bc7 FB |
332 | register_ioport_read (0x388, 4, 1, adlib_read, s); |
333 | register_ioport_write (0x388, 4, 1, adlib_write, s); | |
334 | ||
335 | register_ioport_read (conf.port, 4, 1, adlib_read, s); | |
336 | register_ioport_write (conf.port, 4, 1, adlib_write, s); | |
337 | ||
338 | register_ioport_read (conf.port + 8, 2, 1, adlib_read, s); | |
339 | register_ioport_write (conf.port + 8, 2, 1, adlib_write, s); | |
c0fe3827 FB |
340 | |
341 | return 0; | |
85571bc7 | 342 | } |