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 25 #include "qemu/osdep.h" 26 #include "qapi/error.h" 27 #include "hw/hw.h" 28 #include "hw/audio/soundhw.h" 29 #include "audio/audio.h" 30 #include "hw/isa/isa.h" 31 32 //#define DEBUG 33 34 #define ADLIB_KILL_TIMERS 1 35 36 #define ADLIB_DESC "Yamaha YM3812 (OPL2)" 37 38 #ifdef DEBUG 39 #include "qemu/timer.h" 40 #endif 41 42 #define dolog(...) AUD_log ("adlib", __VA_ARGS__) 43 #ifdef DEBUG 44 #define ldebug(...) dolog (__VA_ARGS__) 45 #else 46 #define ldebug(...) 47 #endif 48 49 #include "fmopl.h" 50 #define SHIFT 1 51 52 #define TYPE_ADLIB "adlib" 53 #define ADLIB(obj) OBJECT_CHECK(AdlibState, (obj), TYPE_ADLIB) 54 55 typedef struct { 56 ISADevice parent_obj; 57 58 QEMUSoundCard card; 59 uint32_t freq; 60 uint32_t port; 61 int ticking[2]; 62 int enabled; 63 int active; 64 int bufpos; 65 #ifdef DEBUG 66 int64_t exp[2]; 67 #endif 68 int16_t *mixbuf; 69 uint64_t dexp[2]; 70 SWVoiceOut *voice; 71 int left, pos, samples; 72 QEMUAudioTimeStamp ats; 73 FM_OPL *opl; 74 PortioList port_list; 75 } AdlibState; 76 77 static AdlibState *glob_adlib; 78 79 static void adlib_stop_opl_timer (AdlibState *s, size_t n) 80 { 81 OPLTimerOver (s->opl, n); 82 s->ticking[n] = 0; 83 } 84 85 static void adlib_kill_timers (AdlibState *s) 86 { 87 size_t i; 88 89 for (i = 0; i < 2; ++i) { 90 if (s->ticking[i]) { 91 uint64_t delta; 92 93 delta = AUD_get_elapsed_usec_out (s->voice, &s->ats); 94 ldebug ( 95 "delta = %f dexp = %f expired => %d\n", 96 delta / 1000000.0, 97 s->dexp[i] / 1000000.0, 98 delta >= s->dexp[i] 99 ); 100 if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) { 101 adlib_stop_opl_timer (s, i); 102 AUD_init_time_stamp_out (s->voice, &s->ats); 103 } 104 } 105 } 106 } 107 108 static void adlib_write(void *opaque, uint32_t nport, uint32_t val) 109 { 110 AdlibState *s = opaque; 111 int a = nport & 3; 112 113 s->active = 1; 114 AUD_set_active_out (s->voice, 1); 115 116 adlib_kill_timers (s); 117 118 OPLWrite (s->opl, a, val); 119 } 120 121 static uint32_t adlib_read(void *opaque, uint32_t nport) 122 { 123 AdlibState *s = opaque; 124 uint8_t data; 125 int a = nport & 3; 126 127 adlib_kill_timers (s); 128 data = OPLRead (s->opl, a); 129 130 return data; 131 } 132 133 static void timer_handler (int c, double interval_Sec) 134 { 135 AdlibState *s = glob_adlib; 136 unsigned n = c & 1; 137 #ifdef DEBUG 138 double interval; 139 int64_t exp; 140 #endif 141 142 if (interval_Sec == 0.0) { 143 s->ticking[n] = 0; 144 return; 145 } 146 147 s->ticking[n] = 1; 148 #ifdef DEBUG 149 interval = NANOSECONDS_PER_SECOND * interval_Sec; 150 exp = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + interval; 151 s->exp[n] = exp; 152 #endif 153 154 s->dexp[n] = interval_Sec * 1000000.0; 155 AUD_init_time_stamp_out (s->voice, &s->ats); 156 } 157 158 static int write_audio (AdlibState *s, int samples) 159 { 160 int net = 0; 161 int pos = s->pos; 162 163 while (samples) { 164 int nbytes, wbytes, wsampl; 165 166 nbytes = samples << SHIFT; 167 wbytes = AUD_write ( 168 s->voice, 169 s->mixbuf + (pos << (SHIFT - 1)), 170 nbytes 171 ); 172 173 if (wbytes) { 174 wsampl = wbytes >> SHIFT; 175 176 samples -= wsampl; 177 pos = (pos + wsampl) % s->samples; 178 179 net += wsampl; 180 } 181 else { 182 break; 183 } 184 } 185 186 return net; 187 } 188 189 static void adlib_callback (void *opaque, int free) 190 { 191 AdlibState *s = opaque; 192 int samples, net = 0, to_play, written; 193 194 samples = free >> SHIFT; 195 if (!(s->active && s->enabled) || !samples) { 196 return; 197 } 198 199 to_play = audio_MIN (s->left, samples); 200 while (to_play) { 201 written = write_audio (s, to_play); 202 203 if (written) { 204 s->left -= written; 205 samples -= written; 206 to_play -= written; 207 s->pos = (s->pos + written) % s->samples; 208 } 209 else { 210 return; 211 } 212 } 213 214 samples = audio_MIN (samples, s->samples - s->pos); 215 if (!samples) { 216 return; 217 } 218 219 YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples); 220 221 while (samples) { 222 written = write_audio (s, samples); 223 224 if (written) { 225 net += written; 226 samples -= written; 227 s->pos = (s->pos + written) % s->samples; 228 } 229 else { 230 s->left = samples; 231 return; 232 } 233 } 234 } 235 236 static void Adlib_fini (AdlibState *s) 237 { 238 if (s->opl) { 239 OPLDestroy (s->opl); 240 s->opl = NULL; 241 } 242 243 g_free(s->mixbuf); 244 245 s->active = 0; 246 s->enabled = 0; 247 AUD_remove_card (&s->card); 248 } 249 250 static MemoryRegionPortio adlib_portio_list[] = { 251 { 0, 4, 1, .read = adlib_read, .write = adlib_write, }, 252 { 0, 2, 1, .read = adlib_read, .write = adlib_write, }, 253 { 0x388, 4, 1, .read = adlib_read, .write = adlib_write, }, 254 PORTIO_END_OF_LIST(), 255 }; 256 257 static void adlib_realizefn (DeviceState *dev, Error **errp) 258 { 259 AdlibState *s = ADLIB(dev); 260 struct audsettings as; 261 262 if (glob_adlib) { 263 error_setg (errp, "Cannot create more than 1 adlib device"); 264 return; 265 } 266 glob_adlib = s; 267 268 s->opl = OPLCreate (3579545, s->freq); 269 if (!s->opl) { 270 error_setg (errp, "OPLCreate %d failed", s->freq); 271 return; 272 } 273 else { 274 OPLSetTimerHandler (s->opl, timer_handler, 0); 275 s->enabled = 1; 276 } 277 278 as.freq = s->freq; 279 as.nchannels = SHIFT; 280 as.fmt = AUD_FMT_S16; 281 as.endianness = AUDIO_HOST_ENDIANNESS; 282 283 AUD_register_card ("adlib", &s->card); 284 285 s->voice = AUD_open_out ( 286 &s->card, 287 s->voice, 288 "adlib", 289 s, 290 adlib_callback, 291 &as 292 ); 293 if (!s->voice) { 294 Adlib_fini (s); 295 error_setg (errp, "Initializing audio voice failed"); 296 return; 297 } 298 299 s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT; 300 s->mixbuf = g_malloc0 (s->samples << SHIFT); 301 302 adlib_portio_list[0].offset = s->port; 303 adlib_portio_list[1].offset = s->port + 8; 304 portio_list_init (&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib"); 305 portio_list_add (&s->port_list, isa_address_space_io(&s->parent_obj), 0); 306 } 307 308 static Property adlib_properties[] = { 309 DEFINE_PROP_UINT32 ("iobase", AdlibState, port, 0x220), 310 DEFINE_PROP_UINT32 ("freq", AdlibState, freq, 44100), 311 DEFINE_PROP_END_OF_LIST (), 312 }; 313 314 static void adlib_class_initfn (ObjectClass *klass, void *data) 315 { 316 DeviceClass *dc = DEVICE_CLASS (klass); 317 318 dc->realize = adlib_realizefn; 319 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 320 dc->desc = ADLIB_DESC; 321 dc->props = adlib_properties; 322 } 323 324 static const TypeInfo adlib_info = { 325 .name = TYPE_ADLIB, 326 .parent = TYPE_ISA_DEVICE, 327 .instance_size = sizeof (AdlibState), 328 .class_init = adlib_class_initfn, 329 }; 330 331 static int Adlib_init (ISABus *bus) 332 { 333 isa_create_simple (bus, TYPE_ADLIB); 334 return 0; 335 } 336 337 static void adlib_register_types (void) 338 { 339 type_register_static (&adlib_info); 340 isa_register_soundhw("adlib", ADLIB_DESC, Adlib_init); 341 } 342 343 type_init (adlib_register_types) 344