fb065187e4
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1131 c046a42c-6fe2-441c-8c8c-71466251a162
314 lines
7.4 KiB
C
314 lines
7.4 KiB
C
/*
|
|
* QEMU Adlib emulation
|
|
*
|
|
* Copyright (c) 2004 Vassili Karpov (malc)
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "vl.h"
|
|
|
|
#define dolog(...) AUD_log ("adlib", __VA_ARGS__)
|
|
#ifdef DEBUG
|
|
#define ldebug(...) dolog (__VA_ARGS__)
|
|
#else
|
|
#define ldebug(...)
|
|
#endif
|
|
|
|
#ifdef USE_YMF262
|
|
#define HAS_YMF262 1
|
|
#include "ymf262.h"
|
|
void YMF262UpdateOneQEMU(int which, INT16 *dst, int length);
|
|
#define SHIFT 2
|
|
#else
|
|
#include "fmopl.h"
|
|
#define SHIFT 1
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#define small_delay() Sleep (1)
|
|
#else
|
|
#define small_delay() usleep (1)
|
|
#endif
|
|
|
|
#define IO_READ_PROTO(name) \
|
|
uint32_t name (void *opaque, uint32_t nport)
|
|
#define IO_WRITE_PROTO(name) \
|
|
void name (void *opaque, uint32_t nport, uint32_t val)
|
|
|
|
static struct {
|
|
int port;
|
|
int freq;
|
|
} conf = {0x220, 44100};
|
|
|
|
typedef struct {
|
|
int enabled;
|
|
int active;
|
|
int cparam;
|
|
int64_t ticks;
|
|
int bufpos;
|
|
int16_t *mixbuf;
|
|
double interval;
|
|
QEMUTimer *ts, *opl_ts;
|
|
SWVoice *voice;
|
|
int left, pos, samples, bytes_per_second, old_free;
|
|
int refcount;
|
|
#ifndef USE_YMF262
|
|
FM_OPL *opl;
|
|
#endif
|
|
} AdlibState;
|
|
|
|
static AdlibState adlib;
|
|
|
|
static IO_WRITE_PROTO(adlib_write)
|
|
{
|
|
AdlibState *s = opaque;
|
|
int a = nport & 3;
|
|
int status;
|
|
|
|
s->ticks = qemu_get_clock (vm_clock);
|
|
s->active = 1;
|
|
AUD_enable (s->voice, 1);
|
|
|
|
#ifdef USE_YMF262
|
|
status = YMF262Write (0, a, val);
|
|
#else
|
|
status = OPLWrite (s->opl, a, val);
|
|
#endif
|
|
}
|
|
|
|
static IO_READ_PROTO(adlib_read)
|
|
{
|
|
AdlibState *s = opaque;
|
|
uint8_t data;
|
|
int a = nport & 3;
|
|
|
|
#ifdef USE_YMF262
|
|
(void) s;
|
|
data = YMF262Read (0, a);
|
|
#else
|
|
data = OPLRead (s->opl, a);
|
|
#endif
|
|
return data;
|
|
}
|
|
|
|
static void OPL_timer (void *opaque)
|
|
{
|
|
AdlibState *s = opaque;
|
|
#ifdef USE_YMF262
|
|
YMF262TimerOver (s->cparam >> 1, s->cparam & 1);
|
|
#else
|
|
OPLTimerOver (s->opl, s->cparam);
|
|
#endif
|
|
qemu_mod_timer (s->opl_ts, qemu_get_clock (vm_clock) + s->interval);
|
|
}
|
|
|
|
static void YMF262TimerHandler (int c, double interval_Sec)
|
|
{
|
|
AdlibState *s = &adlib;
|
|
if (interval_Sec == 0.0) {
|
|
qemu_del_timer (s->opl_ts);
|
|
return;
|
|
}
|
|
s->cparam = c;
|
|
s->interval = ticks_per_sec * interval_Sec;
|
|
qemu_mod_timer (s->opl_ts, qemu_get_clock (vm_clock) + s->interval);
|
|
small_delay ();
|
|
}
|
|
|
|
static int write_audio (AdlibState *s, int samples)
|
|
{
|
|
int net = 0;
|
|
int ss = samples;
|
|
while (samples) {
|
|
int nbytes = samples << SHIFT;
|
|
int wbytes = AUD_write (s->voice,
|
|
s->mixbuf + (s->pos << (SHIFT - 1)),
|
|
nbytes);
|
|
int wsampl = wbytes >> SHIFT;
|
|
samples -= wsampl;
|
|
s->pos = (s->pos + wsampl) % s->samples;
|
|
net += wsampl;
|
|
if (!wbytes)
|
|
break;
|
|
}
|
|
if (net > ss) {
|
|
dolog ("WARNING: net > ss\n");
|
|
}
|
|
return net;
|
|
}
|
|
|
|
static void timer (void *opaque)
|
|
{
|
|
AdlibState *s = opaque;
|
|
int elapsed, samples, net = 0;
|
|
|
|
if (s->refcount)
|
|
dolog ("refcount=%d\n", s->refcount);
|
|
|
|
s->refcount += 1;
|
|
if (!(s->active && s->enabled))
|
|
goto reset;
|
|
|
|
AUD_run ();
|
|
|
|
while (s->left) {
|
|
int written = write_audio (s, s->left);
|
|
net += written;
|
|
if (!written)
|
|
goto reset2;
|
|
s->left -= written;
|
|
}
|
|
s->pos = 0;
|
|
|
|
elapsed = AUD_calc_elapsed (s->voice);
|
|
if (!elapsed)
|
|
goto reset2;
|
|
|
|
/* elapsed = AUD_get_free (s->voice); */
|
|
samples = elapsed >> SHIFT;
|
|
if (!samples)
|
|
goto reset2;
|
|
|
|
samples = audio_MIN (samples, s->samples - s->pos);
|
|
if (s->left)
|
|
dolog ("left=%d samples=%d elapsed=%d free=%d\n",
|
|
s->left, samples, elapsed, AUD_get_free (s->voice));
|
|
|
|
if (!samples)
|
|
goto reset2;
|
|
|
|
#ifdef USE_YMF262
|
|
YMF262UpdateOneQEMU (0, s->mixbuf + s->pos * 2, samples);
|
|
#else
|
|
YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples);
|
|
#endif
|
|
|
|
while (samples) {
|
|
int written = write_audio (s, samples);
|
|
net += written;
|
|
if (!written)
|
|
break;
|
|
samples -= written;
|
|
}
|
|
if (!samples)
|
|
s->pos = 0;
|
|
s->left = samples;
|
|
|
|
reset2:
|
|
AUD_adjust (s->voice, net << SHIFT);
|
|
reset:
|
|
qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + ticks_per_sec / 1024);
|
|
s->refcount -= 1;
|
|
}
|
|
|
|
static void Adlib_fini (AdlibState *s)
|
|
{
|
|
#ifdef USE_YMF262
|
|
YMF262Shutdown ();
|
|
#else
|
|
if (s->opl) {
|
|
OPLDestroy (s->opl);
|
|
s->opl = NULL;
|
|
}
|
|
#endif
|
|
|
|
if (s->opl_ts)
|
|
qemu_free_timer (s->opl_ts);
|
|
|
|
if (s->ts)
|
|
qemu_free_timer (s->ts);
|
|
|
|
#define maybe_free(p) if (p) qemu_free (p)
|
|
maybe_free (s->mixbuf);
|
|
#undef maybe_free
|
|
|
|
s->active = 0;
|
|
s->enabled = 0;
|
|
}
|
|
|
|
void Adlib_init (void)
|
|
{
|
|
AdlibState *s = &adlib;
|
|
|
|
memset (s, 0, sizeof (*s));
|
|
|
|
#ifdef USE_YMF262
|
|
if (YMF262Init (1, 14318180, conf.freq)) {
|
|
dolog ("YMF262Init %d failed\n", conf.freq);
|
|
return;
|
|
}
|
|
else {
|
|
YMF262SetTimerHandler (0, YMF262TimerHandler, 0);
|
|
s->enabled = 1;
|
|
}
|
|
#else
|
|
s->opl = OPLCreate (OPL_TYPE_YM3812, 3579545, conf.freq);
|
|
if (!s->opl) {
|
|
dolog ("OPLCreate %d failed\n", conf.freq);
|
|
return;
|
|
}
|
|
else {
|
|
OPLSetTimerHandler (s->opl, YMF262TimerHandler, 0);
|
|
s->enabled = 1;
|
|
}
|
|
#endif
|
|
|
|
s->opl_ts = qemu_new_timer (vm_clock, OPL_timer, s);
|
|
if (!s->opl_ts) {
|
|
dolog ("Can not get timer for adlib emulation\n");
|
|
Adlib_fini (s);
|
|
return;
|
|
}
|
|
|
|
s->ts = qemu_new_timer (vm_clock, timer, s);
|
|
if (!s->opl_ts) {
|
|
dolog ("Can not get timer for adlib emulation\n");
|
|
Adlib_fini (s);
|
|
return;
|
|
}
|
|
|
|
s->voice = AUD_open (s->voice, "adlib", conf.freq, SHIFT, AUD_FMT_S16);
|
|
if (!s->voice) {
|
|
Adlib_fini (s);
|
|
return;
|
|
}
|
|
|
|
s->bytes_per_second = conf.freq << SHIFT;
|
|
s->samples = AUD_get_buffer_size (s->voice) >> SHIFT;
|
|
s->mixbuf = qemu_mallocz (s->samples << SHIFT);
|
|
|
|
if (!s->mixbuf) {
|
|
dolog ("not enough memory for adlib mixing buffer (%d)\n",
|
|
s->samples << SHIFT);
|
|
Adlib_fini (s);
|
|
return;
|
|
}
|
|
register_ioport_read (0x388, 4, 1, adlib_read, s);
|
|
register_ioport_write (0x388, 4, 1, adlib_write, s);
|
|
|
|
register_ioport_read (conf.port, 4, 1, adlib_read, s);
|
|
register_ioport_write (conf.port, 4, 1, adlib_write, s);
|
|
|
|
register_ioport_read (conf.port + 8, 2, 1, adlib_read, s);
|
|
register_ioport_write (conf.port + 8, 2, 1, adlib_write, s);
|
|
|
|
qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
|
|
}
|