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uae-wii/src/driveclick.c

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/*
* UAE - The Un*x Amiga Emulator
*
* Drive Click Emulation Support Functions
*
* Copyright 2004 James Bagg, Toni Wilen
*/
#include "sysconfig.h"
#include "sysdeps.h"
#ifdef DRIVESOUND
#include "uae.h"
#include "options.h"
#include "driveclick.h"
#include "sounddep/sound.h"
#include "zfile.h"
#include "events.h"
#include "fsdb.h"
#include "resource/drive_click.c"
#include "resource/drive_snatch.c"
#include "resource/drive_spin.c"
#include "resource/drive_startup.c"
static struct drvsample drvs[4][DS_END];
static int freq = 44100;
static int drv_starting[4], drv_spinning[4], drv_has_spun[4], drv_has_disk[4];
static int click_initialized;
#define DS_SHIFT 10
static int sample_step;
static uae_s16 *clickbuffer;
uae_s16 *decodewav (uae_u8 *s, int *lenp)
{
uae_s16 *dst;
uae_u8 *src = s;
int len;
if (memcmp (s, "RIFF", 4))
return 0;
if (memcmp (s + 8, "WAVE", 4))
return 0;
s += 12;
len = *lenp;
while (s < src + len) {
if (!memcmp (s, "fmt ", 4))
freq = s[8 + 4] | (s[8 + 5] << 8);
if (!memcmp (s, "data", 4)) {
s += 4;
len = s[0] | (s[1] << 8) | (s[2] << 16) | (s[3] << 24);
dst = xmalloc (len);
#ifdef WORDS_BIGENDIAN
{
int i;
uae_u8* d = (uae_u8*) dst;
for (i = 0; i < len; i+= 2) {
d[i] = s[i + 5];
d[i+1] = s[i + 4];
}
}
#else
memcpy (dst, s + 4, len);
#endif
*lenp = len / 2;
return dst;
}
s += 8 + (s[4] | (s[5] << 8) | (s[6] << 16) | (s[7] << 24));
}
return 0;
}
static int loadsample (const char *path, struct drvsample *ds)
{
struct zfile *f;
uae_u8 *buf;
int size;
int i;
f = zfile_fopen (path, "rb");
if (!f) {
write_log ("driveclick: can't open '%s'\n", path);
return 0;
}
// write_log("driveclick: loading '%s'\n", path);
zfile_fseek (f, 0, SEEK_END);
size = zfile_ftell (f);
buf = malloc (size);
zfile_fseek (f, 0, SEEK_SET);
zfile_fread (buf, size, 1, f);
zfile_fclose (f);
/*
printf("size=%i \n", size);
for (i = 0; i < size; i++) {
printf("0x%02x,", buf[i]);
if (i % 20 == 19) {
printf("\n");
}
}
printf("\n");
flush(NULL);
}
*/
ds->len = size;
ds->p = decodewav (buf, &ds->len);
free (buf);
return 1;
}
//The same function as load sample, but the wav data is already in memory.
//No read, just decode.
static int loadsample_resource(int resId, struct drvsample *ds) {
uae_u8* buf = NULL;
int size;
switch (resId) {
case DS_CLICK: {
buf = res_drive_click;
size = res_drive_click_size;
} break;
case DS_SPIN :
case DS_SPINND: {
buf = res_drive_spin;
size = res_drive_spin_size;
} break;
case DS_START: {
buf = res_drive_startup;
size = res_drive_startup_size;
} break;
case DS_SNATCH: {
buf = res_drive_snatch;
size = res_drive_snatch_size;
} break;
default: return 0;
} //end of switch
//write_log("loading click resource %i \n", resId);
ds->len = size;
ds->p = decodewav (buf, &ds->len);
return 1;
}
static void freesample (struct drvsample *s)
{
free (s->p);
s->p = 0;
}
extern char *start_path;
void driveclick_init (void)
{
int v, vv, i, j;
static char tmp_path[1024];
driveclick_free ();
vv = 0; v = 0;
write_log("driveclick init...\n");
for (i = 0; i < 4; i++) {
if (currprefs.dfxclick[i]) {
/* TODO: Implement location of sample data */
//load from resource
if (currprefs.dfxclick[i] > 0) { // > 0
v = loadsample_resource(DS_CLICK, &drvs[i][DS_CLICK]);
v += loadsample_resource(DS_SPIN, &drvs[i][DS_SPIN]);
v += loadsample_resource(DS_SPINND, &drvs[i][DS_SPINND]);
v += loadsample_resource(DS_SNATCH, &drvs[i][DS_SNATCH]);
v += loadsample_resource(DS_START, &drvs[i][DS_START]);
} else
//load from file
if (currprefs.dfxclick[i] == -1) {
#ifdef GEKKO //currprefs.dfxclickexternal[i] is the path to the wav directory (path contains trailing separator)
sprintf (tmp_path, "%sdrive_click.wav", currprefs.dfxclickexternal[i]);
v = loadsample (tmp_path, &drvs[i][DS_CLICK]);
sprintf (tmp_path, "%sdrive_spin.wav", currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SPIN]);
sprintf (tmp_path, "%sdrive_spinnd.wav", currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SPINND]);
sprintf (tmp_path, "%sdrive_startup.wav", currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_START]);
sprintf (tmp_path, "%sdrive_snatch.wav", currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SNATCH]);
#else
char * start_path = "."; //TODO - ??? set correct path
sprintf (tmp_path, "%suae_data%cdrive_click_%s", start_path, FSDB_DIR_SEPARATOR, currprefs.dfxclickexternal[i]);
v = loadsample (tmp_path, &drvs[i][DS_CLICK]);
sprintf (tmp_path, "%suae_data%cdrive_spin_%s", start_path, FSDB_DIR_SEPARATOR, currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SPIN]);
sprintf (tmp_path, "%suae_data%cdrive_spinnd_%s", start_path, FSDB_DIR_SEPARATOR, currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SPINND]);
sprintf (tmp_path, "%suae_data%cdrive_startup_%s", start_path, FSDB_DIR_SEPARATOR, currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_START]);
sprintf (tmp_path, "%suae_data%cdrive_snatch_%s", start_path, FSDB_DIR_SEPARATOR, currprefs.dfxclickexternal[i]);
v += loadsample (tmp_path, &drvs[i][DS_SNATCH]);
#endif /* GEKKO */
}
if (v == 0) {
int j;
for (j = 0; j < DS_END; j++) {
freesample (&drvs[i][j]);
}
currprefs.dfxclick[i] = changed_prefs.dfxclick[i] = 0;
}
for (j = 0; j < DS_END; j++) {
drvs[i][j].len <<= DS_SHIFT;
}
drvs[i][DS_CLICK].pos = drvs[i][DS_CLICK].len;
drvs[i][DS_SNATCH].pos = drvs[i][DS_SNATCH].len;
vv += abs (currprefs.dfxclick[i]);
}
}
if (vv > 0) {
write_log("reset driveclick \n");
driveclick_reset ();
click_initialized = 1;
}
}
void driveclick_reset (void)
{
free (clickbuffer);
clickbuffer = xmalloc (sndbufsize);
sample_step = (freq << DS_SHIFT) / currprefs.sound_freq;
}
void driveclick_free (void)
{
int i, j;
for (i = 0; i < 4; i++) {
for (j = 0; j < DS_END; j++)
freesample (&drvs[i][j]);
}
memset (drvs, 0, sizeof (drvs));
free (clickbuffer);
clickbuffer = 0;
click_initialized = 0;
}
STATIC_INLINE uae_s16 getsample (void)
{
uae_s32 smp = 0;
int div = 0, i;
for (i = 0; i < 4; i++) {
if (currprefs.dfxclick[i]) {
struct drvsample *ds_start = &drvs[i][DS_START];
struct drvsample *ds_spin = drv_has_disk[i] ? &drvs[i][DS_SPIN] : &drvs[i][DS_SPINND];
struct drvsample *ds_click = &drvs[i][DS_CLICK];
struct drvsample *ds_snatch = &drvs[i][DS_SNATCH];
div += 2;
if (drv_spinning[i] || drv_starting[i]) {
if (drv_starting[i] && drv_has_spun[i]) {
if (ds_start->p && ds_start->pos < ds_start->len) {
smp = ds_start->p[ds_start->pos >> DS_SHIFT];
ds_start->pos += sample_step;
} else {
drv_starting[i] = 0;
}
} else if (drv_starting[i] && drv_has_spun[i] == 0) {
if (ds_snatch->p && ds_snatch->pos < ds_snatch->len) {
smp = ds_snatch->p[ds_snatch->pos >> DS_SHIFT];
ds_snatch->pos += sample_step;
} else {
drv_starting[i] = 0;
ds_start->pos = ds_start->len;
drv_has_spun[i] = 1;
}
}
if (ds_spin->p && drv_starting[i] == 0) {
if (ds_spin->pos >= ds_spin->len)
ds_spin->pos -= ds_spin->len;
smp = ds_spin->p[ds_spin->pos >> DS_SHIFT];
ds_spin->pos += sample_step;
}
}
if (ds_click->p && ds_click->pos < ds_click->len) {
smp += ds_click->p[ds_click->pos >> DS_SHIFT];
ds_click->pos += sample_step;
}
}
}
if (!div)
return 0;
return smp / div;
}
static int clickcnt;
static void mix (void)
{
int total = ((uae_u8*)sndbufpt - (uae_u8*)sndbuffer) / (currprefs.sound_stereo ? 4 : 2);
if (currprefs.dfxclickvolume > 0) {
while (clickcnt < total) {
clickbuffer[clickcnt++] = getsample() * (100 - currprefs.dfxclickvolume) / 100;
}
} else {
while (clickcnt < total) {
clickbuffer[clickcnt++] = getsample();
}
}
}
STATIC_INLINE uae_s16 limit (uae_s32 v)
{
if (v < -32768)
v = -32768;
if (v > 32767)
v = 32767;
return v;
}
void driveclick_mix (uae_s16 *sndbuffer, int size)
{
int i;
if (!click_initialized)
return;
mix();
clickcnt = 0;
if (currprefs.sound_stereo) {
for (i = 0; i < size / 2; i++) {
uae_s16 s = clickbuffer[i];
sndbuffer[0] = limit(((sndbuffer[0] + s) * 2) / 3);
sndbuffer[1] = limit(((sndbuffer[1] + s) * 2) / 3);
sndbuffer += 2;
}
} else {
for (i = 0; i < size; i++) {
sndbuffer[0] = limit(((sndbuffer[0] + clickbuffer[i]) * 2) / 3);
sndbuffer++;
}
}
}
void driveclick_click (int drive, int startOffset)
{
if (!click_initialized)
return;
if (!currprefs.dfxclick[drive])
return;
mix ();
drvs[drive][DS_CLICK].pos = (startOffset * 4) << DS_SHIFT;
if (drvs[drive][DS_CLICK].pos > drvs[drive][DS_CLICK].len / 2)
drvs[drive][DS_CLICK].pos = drvs[drive][DS_CLICK].len / 2;
}
void driveclick_motor (int drive, int running)
{
if (!click_initialized)
return;
if (!currprefs.dfxclick[drive])
return;
mix();
if (running == 0) {
drv_starting[drive] = 0;
drv_spinning[drive] = 0;
} else {
if (drv_spinning[drive] == 0) {
drv_starting[drive] = 1;
drv_spinning[drive] = 1;
if (drv_has_disk[drive] && drv_has_spun[drive] == 0 && drvs[drive][DS_SNATCH].pos >= drvs[drive][DS_SNATCH].len)
drvs[drive][DS_SNATCH].pos = 0;
if (running == 2)
drvs[drive][DS_START].pos = 0;
drvs[drive][DS_SPIN].pos = 0;
}
}
}
void driveclick_insert (int drive, int eject)
{
if (!click_initialized)
return;
if (!currprefs.dfxclick[drive])
return;
if (eject)
drv_has_spun[drive] = 0;
drv_has_disk[drive] = !eject;
}
void driveclick_check_prefs (void)
{
int i;
if (currprefs.dfxclickvolume != changed_prefs.dfxclickvolume ||
currprefs.dfxclick[0] != changed_prefs.dfxclick[0] ||
currprefs.dfxclick[1] != changed_prefs.dfxclick[1] ||
currprefs.dfxclick[2] != changed_prefs.dfxclick[2] ||
currprefs.dfxclick[3] != changed_prefs.dfxclick[3] ||
strcmp (currprefs.dfxclickexternal[0], changed_prefs.dfxclickexternal[0]) ||
strcmp (currprefs.dfxclickexternal[1], changed_prefs.dfxclickexternal[1]) ||
strcmp (currprefs.dfxclickexternal[2], changed_prefs.dfxclickexternal[2]) ||
strcmp (currprefs.dfxclickexternal[3], changed_prefs.dfxclickexternal[3]))
{
currprefs.dfxclickvolume = changed_prefs.dfxclickvolume;
for (i = 0; i < 4; i++) {
currprefs.dfxclick[i] = changed_prefs.dfxclick[i];
strcpy (currprefs.dfxclickexternal[i], changed_prefs.dfxclickexternal[i]);
}
driveclick_init ();
}
}
#endif
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