--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/adlib.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,351 @@
+/*
+ * QEMU Proxy for OPL2/3 emulation by MAME team
+ *
+ * Copyright (c) 2004-2005 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 <assert.h>
+#include "hw.h"
+#include "audiodev.h"
+#include "audio/audio.h"
+#include "isa.h"
+
+//#define DEBUG
+
+#define ADLIB_KILL_TIMERS 1
+
+#ifdef DEBUG
+#include "qemu-timer.h"
+#endif
+
+#define dolog(...) AUD_log ("adlib", __VA_ARGS__)
+#ifdef DEBUG
+#define ldebug(...) dolog (__VA_ARGS__)
+#else
+#define ldebug(...)
+#endif
+
+#ifdef HAS_YMF262
+#include "ymf262.h"
+void YMF262UpdateOneQEMU (int which, INT16 *dst, int length);
+#define SHIFT 2
+#else
+#include "fmopl.h"
+#define SHIFT 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 {
+ QEMUSoundCard card;
+ int ticking[2];
+ int enabled;
+ int active;
+ int bufpos;
+#ifdef DEBUG
+ int64_t exp[2];
+#endif
+ int16_t *mixbuf;
+ uint64_t dexp[2];
+ SWVoiceOut *voice;
+ int left, pos, samples;
+ QEMUAudioTimeStamp ats;
+#ifndef HAS_YMF262
+ FM_OPL *opl;
+#endif
+} AdlibState;
+
+static AdlibState glob_adlib;
+
+static void adlib_stop_opl_timer (AdlibState *s, size_t n)
+{
+#ifdef HAS_YMF262
+ YMF262TimerOver (0, n);
+#else
+ OPLTimerOver (s->opl, n);
+#endif
+ s->ticking[n] = 0;
+}
+
+static void adlib_kill_timers (AdlibState *s)
+{
+ size_t i;
+
+ for (i = 0; i < 2; ++i) {
+ if (s->ticking[i]) {
+ uint64_t delta;
+
+ delta = AUD_get_elapsed_usec_out (s->voice, &s->ats);
+ ldebug (
+ "delta = %f dexp = %f expired => %d\n",
+ delta / 1000000.0,
+ s->dexp[i] / 1000000.0,
+ delta >= s->dexp[i]
+ );
+ if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) {
+ adlib_stop_opl_timer (s, i);
+ AUD_init_time_stamp_out (s->voice, &s->ats);
+ }
+ }
+ }
+}
+
+static IO_WRITE_PROTO(adlib_write)
+{
+ AdlibState *s = opaque;
+ int a = nport & 3;
+ int status;
+
+ s->active = 1;
+ AUD_set_active_out (s->voice, 1);
+
+ adlib_kill_timers (s);
+
+#ifdef HAS_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;
+
+ adlib_kill_timers (s);
+
+#ifdef HAS_YMF262
+ data = YMF262Read (0, a);
+#else
+ data = OPLRead (s->opl, a);
+#endif
+ return data;
+}
+
+static void timer_handler (int c, double interval_Sec)
+{
+ AdlibState *s = &glob_adlib;
+ unsigned n = c & 1;
+#ifdef DEBUG
+ double interval;
+ int64_t exp;
+#endif
+
+ if (interval_Sec == 0.0) {
+ s->ticking[n] = 0;
+ return;
+ }
+
+ s->ticking[n] = 1;
+#ifdef DEBUG
+ interval = ticks_per_sec * interval_Sec;
+ exp = qemu_get_clock (vm_clock) + interval;
+ s->exp[n] = exp;
+#endif
+
+ s->dexp[n] = interval_Sec * 1000000.0;
+ AUD_init_time_stamp_out (s->voice, &s->ats);
+}
+
+static int write_audio (AdlibState *s, int samples)
+{
+ int net = 0;
+ int pos = s->pos;
+
+ while (samples) {
+ int nbytes, wbytes, wsampl;
+
+ nbytes = samples << SHIFT;
+ wbytes = AUD_write (
+ s->voice,
+ s->mixbuf + (pos << (SHIFT - 1)),
+ nbytes
+ );
+
+ if (wbytes) {
+ wsampl = wbytes >> SHIFT;
+
+ samples -= wsampl;
+ pos = (pos + wsampl) % s->samples;
+
+ net += wsampl;
+ }
+ else {
+ break;
+ }
+ }
+
+ return net;
+}
+
+static void adlib_callback (void *opaque, int free)
+{
+ AdlibState *s = opaque;
+ int samples, net = 0, to_play, written;
+
+ samples = free >> SHIFT;
+ if (!(s->active && s->enabled) || !samples) {
+ return;
+ }
+
+ to_play = audio_MIN (s->left, samples);
+ while (to_play) {
+ written = write_audio (s, to_play);
+
+ if (written) {
+ s->left -= written;
+ samples -= written;
+ to_play -= written;
+ s->pos = (s->pos + written) % s->samples;
+ }
+ else {
+ return;
+ }
+ }
+
+ samples = audio_MIN (samples, s->samples - s->pos);
+ if (!samples) {
+ return;
+ }
+
+#ifdef HAS_YMF262
+ YMF262UpdateOneQEMU (0, s->mixbuf + s->pos * 2, samples);
+#else
+ YM3812UpdateOne (s->opl, s->mixbuf + s->pos, samples);
+#endif
+
+ while (samples) {
+ written = write_audio (s, samples);
+
+ if (written) {
+ net += written;
+ samples -= written;
+ s->pos = (s->pos + written) % s->samples;
+ }
+ else {
+ s->left = samples;
+ return;
+ }
+ }
+}
+
+static void Adlib_fini (AdlibState *s)
+{
+#ifdef HAS_YMF262
+ YMF262Shutdown ();
+#else
+ if (s->opl) {
+ OPLDestroy (s->opl);
+ s->opl = NULL;
+ }
+#endif
+
+ if (s->mixbuf) {
+ qemu_free (s->mixbuf);
+ }
+
+ s->active = 0;
+ s->enabled = 0;
+ AUD_remove_card (&s->card);
+}
+
+int Adlib_init (AudioState *audio, qemu_irq *pic)
+{
+ AdlibState *s = &glob_adlib;
+ struct audsettings as;
+
+ if (!audio) {
+ dolog ("No audio state\n");
+ return -1;
+ }
+
+#ifdef HAS_YMF262
+ if (YMF262Init (1, 14318180, conf.freq)) {
+ dolog ("YMF262Init %d failed\n", conf.freq);
+ return -1;
+ }
+ else {
+ YMF262SetTimerHandler (0, timer_handler, 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 -1;
+ }
+ else {
+ OPLSetTimerHandler (s->opl, timer_handler, 0);
+ s->enabled = 1;
+ }
+#endif
+
+ as.freq = conf.freq;
+ as.nchannels = SHIFT;
+ as.fmt = AUD_FMT_S16;
+ as.endianness = AUDIO_HOST_ENDIANNESS;
+
+ AUD_register_card (audio, "adlib", &s->card);
+
+ s->voice = AUD_open_out (
+ &s->card,
+ s->voice,
+ "adlib",
+ s,
+ adlib_callback,
+ &as
+ );
+ if (!s->voice) {
+ Adlib_fini (s);
+ return -1;
+ }
+
+ s->samples = AUD_get_buffer_size_out (s->voice) >> SHIFT;
+ s->mixbuf = qemu_mallocz (s->samples << SHIFT);
+
+ if (!s->mixbuf) {
+ dolog ("Could not allocate mixing buffer, %d samples (each %d bytes)\n",
+ s->samples, 1 << SHIFT);
+ Adlib_fini (s);
+ return -1;
+ }
+
+ 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);
+
+ return 0;
+}