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 "qemu/module.h" 28 #include "hw/hw.h" 29 #include "hw/audio/soundhw.h" 30 #include "audio/audio.h" 31 #include "hw/isa/isa.h" 32 33 //#define DEBUG 34 35 #define ADLIB_KILL_TIMERS 1 36 37 #define ADLIB_DESC "Yamaha YM3812 (OPL2)" 38 39 #ifdef DEBUG 40 #include "qemu/timer.h" 41 #endif 42 43 #define dolog(...) AUD_log ("adlib", __VA_ARGS__) 44 #ifdef DEBUG 45 #define ldebug(...) dolog (__VA_ARGS__) 46 #else 47 #define ldebug(...) 48 #endif 49 50 #include "fmopl.h" 51 #define SHIFT 1 52 53 #define TYPE_ADLIB "adlib" 54 #define ADLIB(obj) OBJECT_CHECK(AdlibState, (obj), TYPE_ADLIB) 55 56 typedef struct { 57 ISADevice parent_obj; 58 59 QEMUSoundCard card; 60 uint32_t freq; 61 uint32_t port; 62 int ticking[2]; 63 int enabled; 64 int active; 65 int bufpos; 66 #ifdef DEBUG 67 int64_t exp[2]; 68 #endif 69 int16_t *mixbuf; 70 uint64_t dexp[2]; 71 SWVoiceOut *voice; 72 int left, pos, samples; 73 QEMUAudioTimeStamp ats; 74 FM_OPL *opl; 75 PortioList port_list; 76 } AdlibState; 77 78 static void adlib_stop_opl_timer (AdlibState *s, size_t n) 79 { 80 OPLTimerOver (s->opl, n); 81 s->ticking[n] = 0; 82 } 83 84 static void adlib_kill_timers (AdlibState *s) 85 { 86 size_t i; 87 88 for (i = 0; i < 2; ++i) { 89 if (s->ticking[i]) { 90 uint64_t delta; 91 92 delta = AUD_get_elapsed_usec_out (s->voice, &s->ats); 93 ldebug ( 94 "delta = %f dexp = %f expired => %d\n", 95 delta / 1000000.0, 96 s->dexp[i] / 1000000.0, 97 delta >= s->dexp[i] 98 ); 99 if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) { 100 adlib_stop_opl_timer (s, i); 101 AUD_init_time_stamp_out (s->voice, &s->ats); 102 } 103 } 104 } 105 } 106 107 static void adlib_write(void *opaque, uint32_t nport, uint32_t val) 108 { 109 AdlibState *s = opaque; 110 int a = nport & 3; 111 112 s->active = 1; 113 AUD_set_active_out (s->voice, 1); 114 115 adlib_kill_timers (s); 116 117 OPLWrite (s->opl, a, val); 118 } 119 120 static uint32_t adlib_read(void *opaque, uint32_t nport) 121 { 122 AdlibState *s = opaque; 123 uint8_t data; 124 int a = nport & 3; 125 126 adlib_kill_timers (s); 127 data = OPLRead (s->opl, a); 128 129 return data; 130 } 131 132 static void timer_handler (void *opaque, int c, double interval_Sec) 133 { 134 AdlibState *s = opaque; 135 unsigned n = c & 1; 136 #ifdef DEBUG 137 double interval; 138 int64_t exp; 139 #endif 140 141 if (interval_Sec == 0.0) { 142 s->ticking[n] = 0; 143 return; 144 } 145 146 s->ticking[n] = 1; 147 #ifdef DEBUG 148 interval = NANOSECONDS_PER_SECOND * interval_Sec; 149 exp = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + interval; 150 s->exp[n] = exp; 151 #endif 152 153 s->dexp[n] = interval_Sec * 1000000.0; 154 AUD_init_time_stamp_out (s->voice, &s->ats); 155 } 156 157 static int write_audio (AdlibState *s, int samples) 158 { 159 int net = 0; 160 int pos = s->pos; 161 162 while (samples) { 163 int nbytes, wbytes, wsampl; 164 165 nbytes = samples << SHIFT; 166 wbytes = AUD_write ( 167 s->voice, 168 s->mixbuf + (pos << (SHIFT - 1)), 169 nbytes 170 ); 171 172 if (wbytes) { 173 wsampl = wbytes >> SHIFT; 174 175 samples -= wsampl; 176 pos = (pos + wsampl) % s->samples; 177 178 net += wsampl; 179 } 180 else { 181 break; 182 } 183 } 184 185 return net; 186 } 187 188 static void adlib_callback (void *opaque, int free) 189 { 190 AdlibState *s = opaque; 191 int samples, net = 0, to_play, written; 192 193 samples = free >> SHIFT; 194 if (!(s->active && s->enabled) || !samples) { 195 return; 196 } 197 198 to_play = audio_MIN (s->left, samples); 199 while (to_play) { 200 written = write_audio (s, to_play); 201 202 if (written) { 203 s->left -= written; 204 samples -= written; 205 to_play -= written; 206 s->pos = (s->pos + written) % s->samples; 207 } 208 else { 209 return; 210 } 211 } 212 213 samples = audio_MIN (samples, s->samples - s->pos); 214 if (!samples) { 215 return; 216 } 217 218 YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples); 219 220 while (samples) { 221 written = write_audio (s, samples); 222 223 if (written) { 224 net += written; 225 samples -= written; 226 s->pos = (s->pos + written) % s->samples; 227 } 228 else { 229 s->left = samples; 230 return; 231 } 232 } 233 } 234 235 static void Adlib_fini (AdlibState *s) 236 { 237 if (s->opl) { 238 OPLDestroy (s->opl); 239 s->opl = NULL; 240 } 241 242 g_free(s->mixbuf); 243 244 s->active = 0; 245 s->enabled = 0; 246 AUD_remove_card (&s->card); 247 } 248 249 static MemoryRegionPortio adlib_portio_list[] = { 250 { 0, 4, 1, .read = adlib_read, .write = adlib_write, }, 251 { 0, 2, 1, .read = adlib_read, .write = adlib_write, }, 252 { 0x388, 4, 1, .read = adlib_read, .write = adlib_write, }, 253 PORTIO_END_OF_LIST(), 254 }; 255 256 static void adlib_realizefn (DeviceState *dev, Error **errp) 257 { 258 AdlibState *s = ADLIB(dev); 259 struct audsettings as; 260 261 s->opl = OPLCreate (3579545, s->freq); 262 if (!s->opl) { 263 error_setg (errp, "OPLCreate %d failed", s->freq); 264 return; 265 } 266 else { 267 OPLSetTimerHandler(s->opl, timer_handler, s); 268 s->enabled = 1; 269 } 270 271 as.freq = s->freq; 272 as.nchannels = SHIFT; 273 as.fmt = AUDIO_FORMAT_S16; 274 as.endianness = AUDIO_HOST_ENDIANNESS; 275 276 AUD_register_card ("adlib", &s->card); 277 278 s->voice = AUD_open_out ( 279 &s->card, 280 s->voice, 281 "adlib", 282 s, 283 adlib_callback, 284 &as 285 ); 286 if (!s->voice) { 287 Adlib_fini (s); 288 error_setg (errp, "Initializing audio voice failed"); 289 return; 290 } 291 292 s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT; 293 s->mixbuf = g_malloc0 (s->samples << SHIFT); 294 295 adlib_portio_list[0].offset = s->port; 296 adlib_portio_list[1].offset = s->port + 8; 297 portio_list_init (&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib"); 298 portio_list_add (&s->port_list, isa_address_space_io(&s->parent_obj), 0); 299 } 300 301 static Property adlib_properties[] = { 302 DEFINE_PROP_UINT32 ("iobase", AdlibState, port, 0x220), 303 DEFINE_PROP_UINT32 ("freq", AdlibState, freq, 44100), 304 DEFINE_PROP_END_OF_LIST (), 305 }; 306 307 static void adlib_class_initfn (ObjectClass *klass, void *data) 308 { 309 DeviceClass *dc = DEVICE_CLASS (klass); 310 311 dc->realize = adlib_realizefn; 312 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 313 dc->desc = ADLIB_DESC; 314 dc->props = adlib_properties; 315 } 316 317 static const TypeInfo adlib_info = { 318 .name = TYPE_ADLIB, 319 .parent = TYPE_ISA_DEVICE, 320 .instance_size = sizeof (AdlibState), 321 .class_init = adlib_class_initfn, 322 }; 323 324 static int Adlib_init (ISABus *bus) 325 { 326 isa_create_simple (bus, TYPE_ADLIB); 327 return 0; 328 } 329 330 static void adlib_register_types (void) 331 { 332 type_register_static (&adlib_info); 333 isa_register_soundhw("adlib", ADLIB_DESC, Adlib_init); 334 } 335 336 type_init (adlib_register_types) 337