328 lines
7.8 KiB
C
328 lines
7.8 KiB
C
/*
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* QEMU Proxy for OPL2/3 emulation by MAME team
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*
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* Copyright (c) 2004-2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/module.h"
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#include "hw/audio/soundhw.h"
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#include "audio/audio.h"
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#include "hw/isa/isa.h"
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#include "hw/qdev-properties.h"
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#include "qom/object.h"
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//#define DEBUG
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#define ADLIB_KILL_TIMERS 1
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#define ADLIB_DESC "Yamaha YM3812 (OPL2)"
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#ifdef DEBUG
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#include "qemu/timer.h"
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#endif
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#define dolog(...) AUD_log ("adlib", __VA_ARGS__)
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#ifdef DEBUG
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#define ldebug(...) dolog (__VA_ARGS__)
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#else
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#define ldebug(...)
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#endif
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#include "fmopl.h"
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#define SHIFT 1
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#define TYPE_ADLIB "adlib"
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OBJECT_DECLARE_SIMPLE_TYPE(AdlibState, ADLIB)
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struct AdlibState {
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ISADevice parent_obj;
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QEMUSoundCard card;
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uint32_t freq;
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uint32_t port;
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int ticking[2];
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int enabled;
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int active;
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int bufpos;
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#ifdef DEBUG
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int64_t exp[2];
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#endif
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int16_t *mixbuf;
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uint64_t dexp[2];
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SWVoiceOut *voice;
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int left, pos, samples;
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QEMUAudioTimeStamp ats;
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FM_OPL *opl;
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PortioList port_list;
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};
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static void adlib_stop_opl_timer (AdlibState *s, size_t n)
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{
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OPLTimerOver (s->opl, n);
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s->ticking[n] = 0;
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}
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static void adlib_kill_timers (AdlibState *s)
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{
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size_t i;
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for (i = 0; i < 2; ++i) {
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if (s->ticking[i]) {
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uint64_t delta;
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delta = AUD_get_elapsed_usec_out (s->voice, &s->ats);
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ldebug (
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"delta = %f dexp = %f expired => %d\n",
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delta / 1000000.0,
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s->dexp[i] / 1000000.0,
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delta >= s->dexp[i]
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);
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if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) {
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adlib_stop_opl_timer (s, i);
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AUD_init_time_stamp_out (s->voice, &s->ats);
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}
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}
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}
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}
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static void adlib_write(void *opaque, uint32_t nport, uint32_t val)
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{
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AdlibState *s = opaque;
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int a = nport & 3;
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s->active = 1;
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AUD_set_active_out (s->voice, 1);
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adlib_kill_timers (s);
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OPLWrite (s->opl, a, val);
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}
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static uint32_t adlib_read(void *opaque, uint32_t nport)
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{
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AdlibState *s = opaque;
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int a = nport & 3;
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adlib_kill_timers (s);
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return OPLRead (s->opl, a);
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}
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static void timer_handler (void *opaque, int c, double interval_Sec)
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{
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AdlibState *s = opaque;
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unsigned n = c & 1;
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#ifdef DEBUG
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double interval;
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int64_t exp;
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#endif
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if (interval_Sec == 0.0) {
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s->ticking[n] = 0;
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return;
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}
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s->ticking[n] = 1;
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#ifdef DEBUG
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interval = NANOSECONDS_PER_SECOND * interval_Sec;
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exp = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + interval;
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s->exp[n] = exp;
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#endif
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s->dexp[n] = interval_Sec * 1000000.0;
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AUD_init_time_stamp_out (s->voice, &s->ats);
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}
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static int write_audio (AdlibState *s, int samples)
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{
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int net = 0;
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int pos = s->pos;
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while (samples) {
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int nbytes, wbytes, wsampl;
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nbytes = samples << SHIFT;
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wbytes = AUD_write (
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s->voice,
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s->mixbuf + (pos << (SHIFT - 1)),
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nbytes
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);
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if (wbytes) {
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wsampl = wbytes >> SHIFT;
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samples -= wsampl;
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pos = (pos + wsampl) % s->samples;
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net += wsampl;
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}
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else {
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break;
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}
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}
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return net;
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}
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static void adlib_callback (void *opaque, int free)
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{
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AdlibState *s = opaque;
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int samples, to_play, written;
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samples = free >> SHIFT;
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if (!(s->active && s->enabled) || !samples) {
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return;
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}
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to_play = MIN (s->left, samples);
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while (to_play) {
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written = write_audio (s, to_play);
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if (written) {
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s->left -= written;
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samples -= written;
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to_play -= written;
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s->pos = (s->pos + written) % s->samples;
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}
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else {
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return;
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}
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}
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samples = MIN (samples, s->samples - s->pos);
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if (!samples) {
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return;
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}
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YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples);
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while (samples) {
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written = write_audio (s, samples);
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if (written) {
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samples -= written;
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s->pos = (s->pos + written) % s->samples;
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}
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else {
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s->left = samples;
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return;
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}
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}
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}
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static void Adlib_fini (AdlibState *s)
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{
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if (s->opl) {
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OPLDestroy (s->opl);
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s->opl = NULL;
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}
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g_free(s->mixbuf);
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s->active = 0;
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s->enabled = 0;
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AUD_remove_card (&s->card);
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}
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static MemoryRegionPortio adlib_portio_list[] = {
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{ 0, 4, 1, .read = adlib_read, .write = adlib_write, },
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{ 0, 2, 1, .read = adlib_read, .write = adlib_write, },
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{ 0x388, 4, 1, .read = adlib_read, .write = adlib_write, },
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PORTIO_END_OF_LIST(),
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};
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static void adlib_realizefn (DeviceState *dev, Error **errp)
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{
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AdlibState *s = ADLIB(dev);
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struct audsettings as;
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s->opl = OPLCreate (3579545, s->freq);
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if (!s->opl) {
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error_setg (errp, "OPLCreate %d failed", s->freq);
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return;
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}
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else {
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OPLSetTimerHandler(s->opl, timer_handler, s);
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s->enabled = 1;
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}
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as.freq = s->freq;
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as.nchannels = SHIFT;
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as.fmt = AUDIO_FORMAT_S16;
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as.endianness = AUDIO_HOST_ENDIANNESS;
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AUD_register_card ("adlib", &s->card);
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s->voice = AUD_open_out (
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&s->card,
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s->voice,
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"adlib",
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s,
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adlib_callback,
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&as
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);
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if (!s->voice) {
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Adlib_fini (s);
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error_setg (errp, "Initializing audio voice failed");
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return;
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}
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s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT;
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s->mixbuf = g_malloc0 (s->samples << SHIFT);
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adlib_portio_list[0].offset = s->port;
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adlib_portio_list[1].offset = s->port + 8;
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portio_list_init (&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib");
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portio_list_add (&s->port_list, isa_address_space_io(&s->parent_obj), 0);
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}
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static Property adlib_properties[] = {
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DEFINE_AUDIO_PROPERTIES(AdlibState, card),
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DEFINE_PROP_UINT32 ("iobase", AdlibState, port, 0x220),
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DEFINE_PROP_UINT32 ("freq", AdlibState, freq, 44100),
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DEFINE_PROP_END_OF_LIST (),
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};
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static void adlib_class_initfn (ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS (klass);
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dc->realize = adlib_realizefn;
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set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
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dc->desc = ADLIB_DESC;
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device_class_set_props(dc, adlib_properties);
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}
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static const TypeInfo adlib_info = {
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.name = TYPE_ADLIB,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof (AdlibState),
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.class_init = adlib_class_initfn,
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};
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static void adlib_register_types (void)
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{
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type_register_static (&adlib_info);
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deprecated_register_soundhw("adlib", ADLIB_DESC, 1, TYPE_ADLIB);
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}
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type_init (adlib_register_types)
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