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-rw-r--r--src/chips/nuked/nukedopl3.c44
-rw-r--r--src/chips/nuked/nukedopl3.h2
-rw-r--r--src/chips/nuked/nukedopl3_174.c48
-rw-r--r--src/chips/nuked/nukedopl3_174.h2
4 files changed, 90 insertions, 6 deletions
diff --git a/src/chips/nuked/nukedopl3.c b/src/chips/nuked/nukedopl3.c
index fe2313c..41f4ca3 100644
--- a/src/chips/nuked/nukedopl3.c
+++ b/src/chips/nuked/nukedopl3.c
@@ -178,6 +178,31 @@ static const Bit8u ch_slot[18] = {
};
/*
+ * Pan law table
+ */
+
+static Bit16u panlawtable[] =
+{
+ 65535, 65529, 65514, 65489, 65454, 65409, 65354, 65289,
+ 65214, 65129, 65034, 64929, 64814, 64689, 64554, 64410,
+ 64255, 64091, 63917, 63733, 63540, 63336, 63123, 62901,
+ 62668, 62426, 62175, 61914, 61644, 61364, 61075, 60776,
+ 60468, 60151, 59825, 59489, 59145, 58791, 58428, 58057,
+ 57676, 57287, 56889, 56482, 56067, 55643, 55211, 54770,
+ 54320, 53863, 53397, 52923, 52441, 51951, 51453, 50947,
+ 50433, 49912, 49383, 48846, 48302, 47750, 47191, 46625,
+ 46052, /* Center */
+ 45472, 44885, 44291, 43690, 43083, 42469, 41848, 41221,
+ 40588, 39948, 39303, 38651, 37994, 37330, 36661, 35986,
+ 35306, 34621, 33930, 33234, 32533, 31827, 31116, 30400,
+ 29680, 28955, 28225, 27492, 26754, 26012, 25266, 24516,
+ 23762, 23005, 22244, 21480, 20713, 19942, 19169, 18392,
+ 17613, 16831, 16046, 15259, 14469, 13678, 12884, 12088,
+ 11291, 10492, 9691, 8888, 8085, 7280, 6473, 5666,
+ 4858, 4050, 3240, 2431, 1620, 810, 0
+};
+
+/*
* Envelope generator
*/
@@ -1071,7 +1096,7 @@ void OPL3_Generate(opl3_chip *chip, Bit16s *buf)
{
accm += *chip->channel[ii].out[jj];
}
- chip->mixbuff[0] += (Bit16s)(accm & chip->channel[ii].cha);
+ chip->mixbuff[0] += (Bit16s)((accm * chip->channel[ii].chl / 65535) & chip->channel[ii].cha);
}
for (ii = 15; ii < 18; ii++)
@@ -1100,7 +1125,7 @@ void OPL3_Generate(opl3_chip *chip, Bit16s *buf)
{
accm += *chip->channel[ii].out[jj];
}
- chip->mixbuff[1] += (Bit16s)(accm & chip->channel[ii].chb);
+ chip->mixbuff[1] += (Bit16s)((accm * chip->channel[ii].chr / 65535) & chip->channel[ii].chb);
}
for (ii = 33; ii < 36; ii++)
@@ -1232,6 +1257,8 @@ void OPL3_Reset(opl3_chip *chip, Bit32u samplerate)
chip->channel[channum].chtype = ch_2op;
chip->channel[channum].cha = 0xffff;
chip->channel[channum].chb = 0xffff;
+ chip->channel[channum].chl = 46052;
+ chip->channel[channum].chr = 46052;
chip->channel[channum].ch_num = channum;
OPL3_ChannelSetupAlg(&chip->channel[channum]);
}
@@ -1241,6 +1268,19 @@ void OPL3_Reset(opl3_chip *chip, Bit32u samplerate)
chip->vibshift = 1;
}
+static void OPL3_ChannelWritePan(opl3_channel *channel, Bit8u data)
+{
+ channel->chl = panlawtable[data & 0x7F];
+ channel->chr = panlawtable[0x7F - (data & 0x7F)];
+}
+
+void OPL3_WritePan(opl3_chip *chip, Bit16u reg, Bit8u v)
+{
+ Bit8u high = (reg >> 8) & 0x01;
+ Bit8u regm = reg & 0xff;
+ OPL3_ChannelWritePan(&chip->channel[9 * high + (regm & 0x0f)], v);
+}
+
void OPL3_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v)
{
Bit8u high = (reg >> 8) & 0x01;
diff --git a/src/chips/nuked/nukedopl3.h b/src/chips/nuked/nukedopl3.h
index 8d3318a..268e8de 100644
--- a/src/chips/nuked/nukedopl3.h
+++ b/src/chips/nuked/nukedopl3.h
@@ -101,6 +101,7 @@ struct _opl3_channel {
Bit8u alg;
Bit8u ksv;
Bit16u cha, chb;
+ Bit16u chl, chr;
Bit8u ch_num;
};
@@ -153,6 +154,7 @@ void OPL3_GenerateResampled(opl3_chip *chip, Bit16s *buf);
void OPL3_Reset(opl3_chip *chip, Bit32u samplerate);
void OPL3_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3_WriteRegBuffered(opl3_chip *chip, Bit16u reg, Bit8u v);
+void OPL3_WritePan(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3_GenerateStream(opl3_chip *chip, Bit16s *sndptr, Bit32u numsamples);
void OPL3_GenerateStreamMix(opl3_chip *chip, Bit16s *sndptr, Bit32u numsamples);
diff --git a/src/chips/nuked/nukedopl3_174.c b/src/chips/nuked/nukedopl3_174.c
index 99eab16..23857c9 100644
--- a/src/chips/nuked/nukedopl3_174.c
+++ b/src/chips/nuked/nukedopl3_174.c
@@ -230,6 +230,31 @@ static const Bit8u ch_slot[18] = {
};
/*
+ * Pan law table
+ */
+
+static Bit16u panlawtable[] =
+{
+ 65535, 65529, 65514, 65489, 65454, 65409, 65354, 65289,
+ 65214, 65129, 65034, 64929, 64814, 64689, 64554, 64410,
+ 64255, 64091, 63917, 63733, 63540, 63336, 63123, 62901,
+ 62668, 62426, 62175, 61914, 61644, 61364, 61075, 60776,
+ 60468, 60151, 59825, 59489, 59145, 58791, 58428, 58057,
+ 57676, 57287, 56889, 56482, 56067, 55643, 55211, 54770,
+ 54320, 53863, 53397, 52923, 52441, 51951, 51453, 50947,
+ 50433, 49912, 49383, 48846, 48302, 47750, 47191, 46625,
+ 46052, /* Center */
+ 45472, 44885, 44291, 43690, 43083, 42469, 41848, 41221,
+ 40588, 39948, 39303, 38651, 37994, 37330, 36661, 35986,
+ 35306, 34621, 33930, 33234, 32533, 31827, 31116, 30400,
+ 29680, 28955, 28225, 27492, 26754, 26012, 25266, 24516,
+ 23762, 23005, 22244, 21480, 20713, 19942, 19169, 18392,
+ 17613, 16831, 16046, 15259, 14469, 13678, 12884, 12088,
+ 11291, 10492, 9691, 8888, 8085, 7280, 6473, 5666,
+ 4858, 4050, 3240, 2431, 1620, 810, 0
+};
+
+/*
* Envelope generator
*/
@@ -1082,7 +1107,7 @@ void OPL3v17_Generate(opl3_chip *chip, Bit16s *buf)
{
accm += *chip->channel[ii].out[jj];
}
- chip->mixbuff[0] += (Bit16s)(accm & chip->channel[ii].cha);
+ chip->mixbuff[0] += (Bit16s)((accm * chip->channel[ii].chl / 65535) & chip->channel[ii].cha);
}
for (ii = 15; ii < 18; ii++)
@@ -1121,7 +1146,7 @@ void OPL3v17_Generate(opl3_chip *chip, Bit16s *buf)
{
accm += *chip->channel[ii].out[jj];
}
- chip->mixbuff[1] += (Bit16s)(accm & chip->channel[ii].chb);
+ chip->mixbuff[1] += (Bit16s)((accm * chip->channel[ii].chr / 65535) & chip->channel[ii].chb);
}
for (ii = 33; ii < 36; ii++)
@@ -1220,8 +1245,10 @@ void OPL3v17_Reset(opl3_chip *chip, Bit32u samplerate)
chip->channel[channum].out[2] = &chip->zeromod;
chip->channel[channum].out[3] = &chip->zeromod;
chip->channel[channum].chtype = ch_2op;
- chip->channel[channum].cha = ~0;
- chip->channel[channum].chb = ~0;
+ chip->channel[channum].cha = 0xffff;
+ chip->channel[channum].chb = 0xffff;
+ chip->channel[channum].chl = 46052;
+ chip->channel[channum].chr = 46052;
OPL3_ChannelSetupAlg(&chip->channel[channum]);
}
chip->noise = 0x306600;
@@ -1230,6 +1257,19 @@ void OPL3v17_Reset(opl3_chip *chip, Bit32u samplerate)
chip->vibshift = 1;
}
+static void OPL3v17_ChannelWritePan(opl3_channel *channel, Bit8u data)
+{
+ channel->chl = panlawtable[data & 0x7F];
+ channel->chr = panlawtable[0x7F - (data & 0x7F)];
+}
+
+void OPL3v17_WritePan(opl3_chip *chip, Bit16u reg, Bit8u v)
+{
+ Bit8u high = (reg >> 8) & 0x01;
+ Bit8u regm = reg & 0xff;
+ OPL3v17_ChannelWritePan(&chip->channel[9 * high + (regm & 0x0f)], v);
+}
+
void OPL3v17_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v)
{
Bit8u high = (reg >> 8) & 0x01;
diff --git a/src/chips/nuked/nukedopl3_174.h b/src/chips/nuked/nukedopl3_174.h
index 240802f..cd18562 100644
--- a/src/chips/nuked/nukedopl3_174.h
+++ b/src/chips/nuked/nukedopl3_174.h
@@ -103,6 +103,7 @@ struct _opl3_channel {
Bit8u alg;
Bit8u ksv;
Bit16u cha, chb;
+ Bit16u chl, chr;
};
typedef struct _opl3_writebuf {
@@ -142,6 +143,7 @@ struct _opl3_chip {
void OPL3v17_Generate(opl3_chip *chip, Bit16s *buf);
void OPL3v17_GenerateResampled(opl3_chip *chip, Bit16s *buf);
void OPL3v17_Reset(opl3_chip *chip, Bit32u samplerate);
+void OPL3v17_WritePan(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3v17_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3v17_WriteRegBuffered(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3v17_GenerateStream(opl3_chip *chip, Bit16s *sndptr, Bit32u numsamples);
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-04 02:57:33 +0000