adlib.c (7952B)
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/audio/soundhw.h" 29 #include "audio/audio.h" 30 #include "hw/isa/isa.h" 31 #include "hw/qdev-properties.h" 32 #include "qom/object.h" 33 34 //#define DEBUG 35 36 #define ADLIB_KILL_TIMERS 1 37 38 #define ADLIB_DESC "Yamaha YM3812 (OPL2)" 39 40 #ifdef DEBUG 41 #include "qemu/timer.h" 42 #endif 43 44 #define dolog(...) AUD_log ("adlib", __VA_ARGS__) 45 #ifdef DEBUG 46 #define ldebug(...) dolog (__VA_ARGS__) 47 #else 48 #define ldebug(...) 49 #endif 50 51 #include "fmopl.h" 52 #define SHIFT 1 53 54 #define TYPE_ADLIB "adlib" 55 OBJECT_DECLARE_SIMPLE_TYPE(AdlibState, ADLIB) 56 57 struct AdlibState { 58 ISADevice parent_obj; 59 60 QEMUSoundCard card; 61 uint32_t freq; 62 uint32_t port; 63 int ticking[2]; 64 int enabled; 65 int active; 66 int bufpos; 67 #ifdef DEBUG 68 int64_t exp[2]; 69 #endif 70 int16_t *mixbuf; 71 uint64_t dexp[2]; 72 SWVoiceOut *voice; 73 int left, pos, samples; 74 QEMUAudioTimeStamp ats; 75 FM_OPL *opl; 76 PortioList port_list; 77 }; 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 int a = nport & 3; 125 126 adlib_kill_timers (s); 127 return OPLRead (s->opl, a); 128 } 129 130 static void timer_handler (void *opaque, int c, double interval_Sec) 131 { 132 AdlibState *s = opaque; 133 unsigned n = c & 1; 134 #ifdef DEBUG 135 double interval; 136 int64_t exp; 137 #endif 138 139 if (interval_Sec == 0.0) { 140 s->ticking[n] = 0; 141 return; 142 } 143 144 s->ticking[n] = 1; 145 #ifdef DEBUG 146 interval = NANOSECONDS_PER_SECOND * interval_Sec; 147 exp = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + interval; 148 s->exp[n] = exp; 149 #endif 150 151 s->dexp[n] = interval_Sec * 1000000.0; 152 AUD_init_time_stamp_out (s->voice, &s->ats); 153 } 154 155 static int write_audio (AdlibState *s, int samples) 156 { 157 int net = 0; 158 int pos = s->pos; 159 160 while (samples) { 161 int nbytes, wbytes, wsampl; 162 163 nbytes = samples << SHIFT; 164 wbytes = AUD_write ( 165 s->voice, 166 s->mixbuf + (pos << (SHIFT - 1)), 167 nbytes 168 ); 169 170 if (wbytes) { 171 wsampl = wbytes >> SHIFT; 172 173 samples -= wsampl; 174 pos = (pos + wsampl) % s->samples; 175 176 net += wsampl; 177 } 178 else { 179 break; 180 } 181 } 182 183 return net; 184 } 185 186 static void adlib_callback (void *opaque, int free) 187 { 188 AdlibState *s = opaque; 189 int samples, to_play, written; 190 191 samples = free >> SHIFT; 192 if (!(s->active && s->enabled) || !samples) { 193 return; 194 } 195 196 to_play = MIN (s->left, samples); 197 while (to_play) { 198 written = write_audio (s, to_play); 199 200 if (written) { 201 s->left -= written; 202 samples -= written; 203 to_play -= written; 204 s->pos = (s->pos + written) % s->samples; 205 } 206 else { 207 return; 208 } 209 } 210 211 samples = MIN (samples, s->samples - s->pos); 212 if (!samples) { 213 return; 214 } 215 216 YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples); 217 218 while (samples) { 219 written = write_audio (s, samples); 220 221 if (written) { 222 samples -= written; 223 s->pos = (s->pos + written) % s->samples; 224 } 225 else { 226 s->left = samples; 227 return; 228 } 229 } 230 } 231 232 static void Adlib_fini (AdlibState *s) 233 { 234 if (s->opl) { 235 OPLDestroy (s->opl); 236 s->opl = NULL; 237 } 238 239 g_free(s->mixbuf); 240 241 s->active = 0; 242 s->enabled = 0; 243 AUD_remove_card (&s->card); 244 } 245 246 static MemoryRegionPortio adlib_portio_list[] = { 247 { 0, 4, 1, .read = adlib_read, .write = adlib_write, }, 248 { 0, 2, 1, .read = adlib_read, .write = adlib_write, }, 249 { 0x388, 4, 1, .read = adlib_read, .write = adlib_write, }, 250 PORTIO_END_OF_LIST(), 251 }; 252 253 static void adlib_realizefn (DeviceState *dev, Error **errp) 254 { 255 AdlibState *s = ADLIB(dev); 256 struct audsettings as; 257 258 s->opl = OPLCreate (3579545, s->freq); 259 if (!s->opl) { 260 error_setg (errp, "OPLCreate %d failed", s->freq); 261 return; 262 } 263 else { 264 OPLSetTimerHandler(s->opl, timer_handler, s); 265 s->enabled = 1; 266 } 267 268 as.freq = s->freq; 269 as.nchannels = SHIFT; 270 as.fmt = AUDIO_FORMAT_S16; 271 as.endianness = AUDIO_HOST_ENDIANNESS; 272 273 AUD_register_card ("adlib", &s->card); 274 275 s->voice = AUD_open_out ( 276 &s->card, 277 s->voice, 278 "adlib", 279 s, 280 adlib_callback, 281 &as 282 ); 283 if (!s->voice) { 284 Adlib_fini (s); 285 error_setg (errp, "Initializing audio voice failed"); 286 return; 287 } 288 289 s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT; 290 s->mixbuf = g_malloc0 (s->samples << SHIFT); 291 292 adlib_portio_list[0].offset = s->port; 293 adlib_portio_list[1].offset = s->port + 8; 294 portio_list_init (&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib"); 295 portio_list_add (&s->port_list, isa_address_space_io(&s->parent_obj), 0); 296 } 297 298 static Property adlib_properties[] = { 299 DEFINE_AUDIO_PROPERTIES(AdlibState, card), 300 DEFINE_PROP_UINT32 ("iobase", AdlibState, port, 0x220), 301 DEFINE_PROP_UINT32 ("freq", AdlibState, freq, 44100), 302 DEFINE_PROP_END_OF_LIST (), 303 }; 304 305 static void adlib_class_initfn (ObjectClass *klass, void *data) 306 { 307 DeviceClass *dc = DEVICE_CLASS (klass); 308 309 dc->realize = adlib_realizefn; 310 set_bit(DEVICE_CATEGORY_SOUND, dc->categories); 311 dc->desc = ADLIB_DESC; 312 device_class_set_props(dc, adlib_properties); 313 } 314 315 static const TypeInfo adlib_info = { 316 .name = TYPE_ADLIB, 317 .parent = TYPE_ISA_DEVICE, 318 .instance_size = sizeof (AdlibState), 319 .class_init = adlib_class_initfn, 320 }; 321 322 static void adlib_register_types (void) 323 { 324 type_register_static (&adlib_info); 325 deprecated_register_soundhw("adlib", ADLIB_DESC, 1, TYPE_ADLIB); 326 } 327 328 type_init (adlib_register_types)