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ModSlayer.java
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import java.io.IOException;
class ModSlayer {
private final Mod mod;
private ModTrackInfo tracks[];
public static final String VERSION = "1.0";
public static final String COPYRIGHT = "";
public static final int EFF_VOL_SLIDE = 1;
public static final int EFF_PORT_DOWN = 2;
public static final int EFF_PORT_UP = 4;
public static final int EFF_VIBRATO = 8;
public static final int EFF_ARPEGGIO = 16;
public static final int EFF_PORT_TO = 32;
public static final int EFF_TREMOLO = 64;
public static final int EFF_RETRIG = 128;
public static final int MIX_BUF_SIZE = 2048;
public static final int DEF_TEMPO_NTSC = 6;
public static final int DEF_TEMPO_PAL = 6;
public static final int DEF_BPM_NTSC = 125;
public static final int DEF_BPM_PAL = 145;
public static final int MIDCRATE = 8448;
public static final int MAX_SAMPLES = 100;
public static final int MAX_TRACKS = 32;
public static final int S3M_MAGIC1 = 4122;
public static final int S3M_MAGIC2 = Mod.fourCC("SCRM");
public static final int S3M_INSTR2 = Mod.fourCC("SCRS");
private static final int normal_vol_adj[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63, 63
};
private static final int loud_vol_adj[] = {
0, 0, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42,
44, 46, 47, 48, 49, 50, 51, 52, 53, 53, 54, 55, 55, 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 61, 62,
62, 62, 63, 63, 63, 63, 63, 63
};
private static final int sintable[] = {
0, 25, 50, 74, 98, 120, 142, 162, 180, 197, 212, 225, 236, 244, 250, 254, 255, 254, 250, 244, 236, 225, 212,
197, 180, 162, 142, 120, 98, 74, 50, 25
};
private static final int period_set[] = {
1712, 1616, 1525, 1440, 1359, 1283, 1211, 1143, 1078, 1018, 961, 907, 856, 808, 763, 720, 679, 641, 605,
571, 539, 509, 480, 453, 428, 404, 381, 360, 340, 321, 303, 286, 270, 254, 240, 227, 214, 202, 191, 180,
170, 160, 151, 143, 135, 127, 120, 113, 107, 101, 95, 90, 85, 80, 76, 71, 67, 64, 60, 57, 53, 50, 48, 45,
42, 40, 38, 36, 34, 32, 30, 28, 27, 25, 24, 22, 21, 20, 19, 18, 17, 16, 15, 14
};
public static final int period_set_step[] = {
1664, 1570, 1482, 1399, 1321, 1247, 1177, 1110, 1048, 989, 934, 881, 832, 785, 741, 699, 660, 623, 588, 555,
524, 494, 466, 440, 416, 392, 370, 350, 330, 312, 294, 278, 262, 247, 233, 220, 208, 196, 185, 175, 165,
155, 147, 139, 131, 123, 116, 110, 104, 98, 92, 87, 82, 78, 73, 69, 65, 62, 58, 55, 51, 49, 46, 43, 41, 39,
37, 35, 33, 31, 29, 27, 26, 24, 23, 21, 20, 19, 18, 17, 16, 15, 14, 14
};
private final int def_tempo;
private final int def_bpm;
private byte[] vol_table;
private int vol_adj[];
private int vol_shift;
private int order_pos;
private int tempo;
private int tempo_wait;
private int bpm;
private int row;
private int break_row;
private int bpm_samples;
private int pattofs;
private byte patt[];
private int numtracks;
private int mixspeed;
private boolean mod_done;
private boolean bit16;
private final int samplingrate;
private final int oversample;
private final int gain;
private int nloops;
private final boolean loud;
public static final byte sunfmt[] = {
46, 115, 110, 100, 0, 0, 0, 24, 127, 127, 127, 127, 0, 0, 0, 1, 0, 0, 31, 76, 0, 0, 0, 1, 0, 0, 0, 0
};
public int oln;
private void beattrack(ModTrackInfo modtrackinfo) {
if (modtrackinfo.period_low_limit == 0) {
modtrackinfo.period_low_limit = 1;
}
if ((modtrackinfo.effect & 1) != 0) {
modtrackinfo.volume += modtrackinfo.vol_slide;
if (modtrackinfo.volume < 0) {
modtrackinfo.volume = 0;
}
if (modtrackinfo.volume > 64) {
modtrackinfo.volume = 64;
}
}
if ((modtrackinfo.effect & 2) != 0) {
if ((modtrackinfo.period += modtrackinfo.port_down) > modtrackinfo.period_high_limit) {
modtrackinfo.period = modtrackinfo.period_high_limit;
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.period;
}
if ((modtrackinfo.effect & 4) != 0) {
if ((modtrackinfo.period -= modtrackinfo.port_up) < modtrackinfo.period_low_limit) {
if (mod.s3m) {
modtrackinfo.period = modtrackinfo.period_high_limit;
} else {
modtrackinfo.period = modtrackinfo.period_low_limit;
}
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.period;
}
if ((modtrackinfo.effect & 0x20) != 0) {
if (modtrackinfo.portto < modtrackinfo.period) {
if ((modtrackinfo.period += modtrackinfo.port_inc) > modtrackinfo.portto) {
modtrackinfo.period = modtrackinfo.portto;
}
} else if (modtrackinfo.portto > modtrackinfo.period
&& (modtrackinfo.period -= modtrackinfo.port_inc) < modtrackinfo.portto) {
modtrackinfo.period = modtrackinfo.portto;
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.period;
}
if ((modtrackinfo.effect & 8) != 0) {
modtrackinfo.vibpos += modtrackinfo.vib_rate << 2;
int i = sintable[modtrackinfo.vibpos >> 2 & 0x1f] * modtrackinfo.vib_depth >> 7;
if ((modtrackinfo.vibpos & 0x80) != 0) {
i = -i;
}
i += modtrackinfo.period;
if (i < modtrackinfo.period_low_limit) {
i = modtrackinfo.period_low_limit;
}
if (i > modtrackinfo.period_high_limit) {
i = modtrackinfo.period_high_limit;
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / i;
}
if ((modtrackinfo.effect & 0x10) != 0) {
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.arp[modtrackinfo.arpindex];
modtrackinfo.arpindex++;
if (modtrackinfo.arpindex >= 3) {
modtrackinfo.arpindex = 0;
}
}
}
private void mixtrack16Mono(ModTrackInfo modtrackinfo, int ai[], int i, int j) {
byte abyte0[] = modtrackinfo.samples;
int k = modtrackinfo.position;
int j1 = vol_adj[modtrackinfo.volume] * gain >> vol_shift + 8;
int i2 = modtrackinfo.error;
int k1 = modtrackinfo.pitch & 0xfff;
int l1 = modtrackinfo.pitch >> 12;
if (modtrackinfo.replen < 3) {
int l = modtrackinfo.length;
if (k >= l) {
return;
}
int j2 = i + j;
if (modtrackinfo.pitch < 4096) {
while (k < l && i < j2) {
ai[i++] += (abyte0[k] * (4096 - i2) + abyte0[k + 1] * i2) * j1 >> 12;
k += l1 + ((i2 += k1) >> 12);
i2 &= 0xfff;
}
} else {
while (k < l && i < j2) {
ai[i++] += abyte0[k] * j1;
k += l1 + ((i2 += k1) >> 12);
i2 &= 0xfff;
}
}
modtrackinfo.error = i2;
modtrackinfo.position = k;
} else {
int i1 = modtrackinfo.replen + modtrackinfo.repeat;
if (modtrackinfo.pitch < 4096) {
for (; j > 0; j--) {
if (k >= i1) {
k -= modtrackinfo.replen;
}
ai[i++] += (abyte0[k] * (4096 - i2) + abyte0[k + 1] * i2) * j1 >> 12;
k += l1 + ((i2 += k1) >> 12);
i2 &= 0xfff;
}
} else {
for (; j > 0; j--) {
if (k >= i1) {
k -= modtrackinfo.replen;
}
ai[i++] += abyte0[k] * j1;
k += l1 + ((i2 += k1) >> 12);
i2 &= 0xfff;
}
}
modtrackinfo.error = i2;
modtrackinfo.position = k;
}
}
ModSlayer(Mod mod1, int i, int j, int k) {
mod_done = false;
nloops = 1;
loud = false;
oln = 0;
samplingrate = i;
gain = j;
oversample = 1;
mod = mod1;
def_tempo = 6;
def_bpm = k;
}
private void makeVolTable8() {
vol_table = new byte[16640];
int i = 0;
do {
vol_table[i] = (byte) (vol_adj[i >> 8] * (byte) i >> 8 + vol_shift);
} while (++i < 16640);
}
public byte[] turnbytesNorm() {
bit16 = true;
startplaying(loud);
int ai[] = new int[mixspeed];
int ai1[] = new int[mixspeed];
byte abyte0[] = new byte[0x112a880];
oln = 0;
while (!mod_done) {
if (--tempo_wait > 0) {
for (int l = 0; l < numtracks; l++) {
beattrack(tracks[l]);
}
} else {
updatetracks();
}
System.arraycopy(ai1, 0, ai, 0, bpm_samples);
for (int i = 0; i < numtracks; i++) {
mixtrack16Mono(tracks[i], ai, 0, bpm_samples);
}
int i1 = bpm_samples;
if (oversample > 1) {
int j1 = 0;
i1 = bpm_samples / oversample;
if (oversample == 2) {
for (int j = 0; j < i1; j++) {
ai[j] = ai[j1] + ai[j1 + 1] >> 1;
j1 += 2;
}
} else {
for (int k = 0; k < i1; k++) {
int k1 = ai[j1++];
for (int l1 = 1; l1 < oversample; l1++) {
k1 += ai[j1++];
}
ai[k] = k1 / oversample;
}
}
}
if (oln + i1 < 0x112a880) {
intToBytes16(ai, abyte0, i1, oln);
oln += i1;
}
}
oln++;
return abyte0;
}
private void updatetracks() {
tempo_wait = tempo;
if (row >= 64) {
if (order_pos >= mod.song_length_patterns) {
order_pos = 0;
nloops--;
if (nloops == 0) {
mod_done = true;
}
}
row = break_row;
break_row = 0;
if (mod.positions[order_pos] == 255) {
order_pos = 0;
row = 0;
}
patt = mod.patterns[mod.positions[order_pos]];
pattofs = row * 4 * numtracks;
order_pos++;
}
row++;
for (int i = 0; i < numtracks; i++) {
pattofs = getTrack(tracks[i], patt, pattofs);
}
}
private int getTrack(ModTrackInfo modtrackinfo, byte abyte0[], int i) {
int j = abyte0[i] & 0xf0;
int k = (abyte0[i++] & 0xf) << 8;
k |= abyte0[i++] & 0xff;
int l = abyte0[i] & 0xf;
j |= (abyte0[i++] & 0xf0) >> 4;
int i1 = abyte0[i++];
modtrackinfo.effect = 0;
if (j != 0) {
j--;
ModInstrument modinstrument = mod.insts[j];
modtrackinfo.volume = modinstrument.volume;
modtrackinfo.length = modinstrument.sample_length;
modtrackinfo.repeat = modinstrument.repeat_point;
modtrackinfo.replen = modinstrument.repeat_length;
modtrackinfo.finetune_rate = modinstrument.finetune_rate;
modtrackinfo.samples = modinstrument.samples;
modtrackinfo.period_low_limit = modinstrument.period_low_limit;
modtrackinfo.period_high_limit = modinstrument.period_high_limit;
}
if (k != 0) {
modtrackinfo.portto = k;
if (l != 3 && l != 5) {
modtrackinfo.start_period = modtrackinfo.period = k;
modtrackinfo.pitch = modtrackinfo.finetune_rate / k;
modtrackinfo.position = 0;
}
}
if (l != 0 || i1 != 0) {
label0:
switch (l) {
case 7: // '\007'
case 8: // '\b'
case 11: // '\013'
default:
break;
case 0: // '\0'
int j1;
for (j1 = 12; modtrackinfo.period < period_set[j1] && ++j1 < 48; ) {
}
modtrackinfo.arp[0] = period_set[j1];
modtrackinfo.arp[1] = period_set[j1 + (i1 & 0xf)];
modtrackinfo.arp[2] = period_set[j1 + ((i1 & 0xf0) >> 4)];
modtrackinfo.arpindex = 0;
modtrackinfo.effect |= 0x10;
break;
case 1: // '\001'
modtrackinfo.effect |= 4;
if (i1 != 0) {
modtrackinfo.port_up = i1;
}
break;
case 2: // '\002'
modtrackinfo.effect |= 2;
if (i1 != 0) {
modtrackinfo.port_down = i1;
}
break;
case 3: // '\003'
if (i1 != 0) {
modtrackinfo.port_inc = i1 & 0xff;
}
modtrackinfo.effect |= 0x20;
break;
case 4: // '\004'
if ((i1 & 0xf) != 0) {
modtrackinfo.vib_depth = i1 & 0xf;
}
if ((i1 & 0xf0) != 0) {
modtrackinfo.vib_rate = (i1 & 0xf0) >> 4;
}
if (k != 0) {
modtrackinfo.vibpos = 0;
}
modtrackinfo.effect |= 8;
break;
case 9: // '\t'
if (i1 == 0) {
i1 = modtrackinfo.oldsampofs;
}
modtrackinfo.oldsampofs = i1;
modtrackinfo.position = (i1 & 0xff) << 8;
break;
case 5: // '\005'
modtrackinfo.effect |= 0x20;
// fall through
case 6: // '\006'
if (l == 6) {
modtrackinfo.effect |= 8;
}
// fall through
case 10: // '\n'
modtrackinfo.vol_slide = ((i1 & 0xf0) >> 4) - (i1 & 0xf);
modtrackinfo.effect |= 1;
break;
case 12: // '\f'
if (i1 > 64 || i1 < 0) {
modtrackinfo.volume = 64;
} else {
modtrackinfo.volume = i1;
}
break;
case 13: // '\r'
break_row = ((i1 & 0xf0) >> 4) * 10 + (i1 & 0xf);
row = 64;
break;
case 14: // '\016'
int k1 = i1 & 0xf0;
i1 &= 0xf;
switch (k1) {
default:
break label0;
case 1: // '\001'
modtrackinfo.period += i1;
if (modtrackinfo.period > modtrackinfo.period_high_limit) {
modtrackinfo.period = modtrackinfo.period_high_limit;
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.period;
break label0;
case 2: // '\002'
modtrackinfo.period -= i1;
break;
}
if (modtrackinfo.period < modtrackinfo.period_low_limit) {
modtrackinfo.period = modtrackinfo.period_low_limit;
}
modtrackinfo.pitch = modtrackinfo.finetune_rate / modtrackinfo.period;
break;
case 15: // '\017'
if (i1 == 0) {
break;
}
i1 &= 0xff;
if (i1 <= 32) {
tempo = i1;
tempo_wait = i1;
} else {
bpm = i1;
bpm_samples = (samplingrate / (103 * i1 >> 8)) * oversample;
}
break;
}
}
return i;
}
private void startplaying(boolean flag) {
vol_adj = flag ? loud_vol_adj : normal_vol_adj;
mixspeed = samplingrate * oversample;
order_pos = 0;
tempo_wait = tempo = def_tempo;
bpm = def_bpm;
row = 64;
break_row = 0;
bpm_samples = (samplingrate / ((24 * bpm) / 60)) * oversample;
numtracks = mod.numtracks;
tracks = new ModTrackInfo[numtracks];
for (int i = 0; i < tracks.length; i++) {
tracks[i] = new ModTrackInfo();
}
if (mod.s3m) {
for (int j = 0; j < mod.insts.length; j++) {
ModInstrument modinstrument = mod.insts[j];
modinstrument.finetune_rate = (int) (428L * modinstrument.finetune_value << 8) / mixspeed;
modinstrument.period_low_limit = 14;
modinstrument.period_high_limit = 1712;
}
} else {
for (int k = 0; k < mod.insts.length; k++) {
ModInstrument modinstrument1 = mod.insts[k];
modinstrument1.finetune_rate = (int) (0x14b080000000L
/ (mixspeed * (1536 - modinstrument1.finetune_value)));
modinstrument1.period_low_limit = 113;
modinstrument1.period_high_limit = 856;
}
}
if (numtracks > 8) {
vol_shift = 2;
} else if (numtracks > 4) {
vol_shift = 1;
} else {
vol_shift = 0;
}
if (!bit16) {
makeVolTable8();
}
}
private static void intToBytes16(int ai[], byte abyte0[], int i, int j) {
int k = j;
for (int l = 0; l < i; l++) {
if (ai[l] < -32767) {
ai[l] = -32767;
}
if (ai[l] > 32767) {
ai[l] = 32767;
}
abyte0[k++] = (byte) (ai[l] >> 8);
abyte0[k] = (byte) (ai[l] & 0xff);
}
}
public byte[] turnbytesUlaw() {
bit16 = true;
startplaying(loud);
int ai[] = new int[mixspeed];
int ai1[] = new int[mixspeed];
int ai2[] = new int[0x30d400];
oln = 0;
while (!mod_done) {
if (--tempo_wait > 0) {
for (int k1 = 0; k1 < numtracks; k1++) {
beattrack(tracks[k1]);
}
} else {
updatetracks();
}
System.arraycopy(ai1, 0, ai, 0, bpm_samples);
for (int i = 0; i < numtracks; i++) {
mixtrack16Mono(tracks[i], ai, 0, bpm_samples);
}
int l1 = bpm_samples;
if (oversample > 1) {
int i2 = 0;
l1 = bpm_samples / oversample;
if (oversample == 2) {
for (int j = 0; j < l1; j++) {
ai[j] = ai[i2] + ai[i2 + 1] >> 1;
i2 += 2;
}
} else {
for (int k = 0; k < l1; k++) {
int k2 = ai[i2++];
for (int l2 = 1; l2 < oversample; l2++) {
k2 += ai[i2++];
}
ai[k] = k2 / oversample;
}
}
}
for (int l = 0; l < l1; l++) {
if (oln < 0x30d400) {
ai2[oln] = ai[l];
oln++;
}
}
}
for (int i1 = 2; i1 < oln; i1++) {
ai2[i1] = (ai2[i1] + ai2[i1 - 2]) / 2;
}
for (int j1 = 57; j1 < oln; j1++) {
ai2[j1] = (ai2[j1] + ai2[j1] + ai2[j1 - 50]) / 3;
}
byte abyte0[] = new byte[oln];
for (int j2 = 0; j2 < oln; j2++) {
abyte0[j2] = UlawUtils.linear2ulawclip(ai2[j2]);
}
return abyte0;
}
}