2 * QEMU Proxy for OPL2/3 emulation by MAME team
4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
28 #define ADLIB_KILL_TIMERS 1
30 #define dolog(...) AUD_log ("adlib", __VA_ARGS__)
32 #define ldebug(...) dolog (__VA_ARGS__)
39 void YMF262UpdateOneQEMU (int which, INT16 *dst, int length);
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)
54 } conf = {0x220, 44100};
68 int left, pos, samples;
69 QEMUAudioTimeStamp ats;
75 static AdlibState glob_adlib;
77 static void adlib_stop_opl_timer (AdlibState *s, size_t n)
80 YMF262TimerOver (0, n);
82 OPLTimerOver (s->opl, n);
87 static void adlib_kill_timers (AdlibState *s)
91 for (i = 0; i < 2; ++i) {
95 delta = AUD_get_elapsed_usec_out (s->voice, &s->ats);
97 "delta = %f dexp = %f expired => %d\n",
99 s->dexp[i] / 1000000.0,
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);
110 static IO_WRITE_PROTO(adlib_write)
112 AdlibState *s = opaque;
117 AUD_set_active_out (s->voice, 1);
119 adlib_kill_timers (s);
122 status = YMF262Write (0, a, val);
124 status = OPLWrite (s->opl, a, val);
128 static IO_READ_PROTO(adlib_read)
130 AdlibState *s = opaque;
134 adlib_kill_timers (s);
137 data = YMF262Read (0, a);
139 data = OPLRead (s->opl, a);
144 static void timer_handler (int c, double interval_Sec)
146 AdlibState *s = &glob_adlib;
153 if (interval_Sec == 0.0) {
160 interval = ticks_per_sec * interval_Sec;
161 exp = qemu_get_clock (vm_clock) + interval;
165 s->dexp[n] = interval_Sec * 1000000.0;
166 AUD_init_time_stamp_out (s->voice, &s->ats);
169 static int write_audio (AdlibState *s, int samples)
175 int nbytes, wbytes, wsampl;
177 nbytes = samples << SHIFT;
180 s->mixbuf + (pos << (SHIFT - 1)),
185 wsampl = wbytes >> SHIFT;
188 pos = (pos + wsampl) % s->samples;
200 static void adlib_callback (void *opaque, int free)
202 AdlibState *s = opaque;
203 int samples, net = 0, to_play, written;
205 samples = free >> SHIFT;
206 if (!(s->active && s->enabled) || !samples) {
210 to_play = audio_MIN (s->left, samples);
212 written = write_audio (s, to_play);
218 s->pos = (s->pos + written) % s->samples;
225 samples = audio_MIN (samples, s->samples - s->pos);
231 YMF262UpdateOneQEMU (0, s->mixbuf + s->pos * 2, samples);
233 YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples);
237 written = write_audio (s, samples);
242 s->pos = (s->pos + written) % s->samples;
251 static void Adlib_fini (AdlibState *s)
263 qemu_free (s->mixbuf);
268 AUD_remove_card (&s->card);
271 int Adlib_init (AudioState *audio, qemu_irq *pic)
273 AdlibState *s = &glob_adlib;
277 dolog ("No audio state\n");
282 if (YMF262Init (1, 14318180, conf.freq)) {
283 dolog ("YMF262Init %d failed\n", conf.freq);
287 YMF262SetTimerHandler (0, timer_handler, 0);
291 s->opl = OPLCreate (OPL_TYPE_YM3812, 3579545, conf.freq);
293 dolog ("OPLCreate %d failed\n", conf.freq);
297 OPLSetTimerHandler (s->opl, timer_handler, 0);
303 as.nchannels = SHIFT;
304 as.fmt = AUD_FMT_S16;
305 as.endianness = AUDIO_HOST_ENDIANNESS;
307 AUD_register_card (audio, "adlib", &s->card);
309 s->voice = AUD_open_out (
322 s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT;
323 s->mixbuf = qemu_mallocz (s->samples << SHIFT);
326 dolog ("Could not allocate mixing buffer, %d samples (each %d bytes)\n",
327 s->samples, 1 << SHIFT);
332 register_ioport_read (0x388, 4, 1, adlib_read, s);
333 register_ioport_write (0x388, 4, 1, adlib_write, s);
335 register_ioport_read (conf.port, 4, 1, adlib_read, s);
336 register_ioport_write (conf.port, 4, 1, adlib_write, s);
338 register_ioport_read (conf.port + 8, 2, 1, adlib_read, s);
339 register_ioport_write (conf.port + 8, 2, 1, adlib_write, s);