1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * OPL2/OPL3/OPL4 FM routines for internal percussion channels
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include "opl3_voice.h"
23
24 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
25
26 static char snd_opl3_drum_table[47] =
27 {
28 OPL3_BASSDRUM_ON, OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, /* 35 - 37 */
29 OPL3_SNAREDRUM_ON, OPL3_HIHAT_ON, OPL3_SNAREDRUM_ON, /* 38 - 40 */
30 OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, OPL3_BASSDRUM_ON, /* 41 - 43 */
31 OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_HIHAT_ON, /* 44 - 46 */
32 OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, /* 47 - 49 */
33
34 OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 50 - 52 */
35 OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 53 - 55 */
36 OPL3_HIHAT_ON, OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, /* 56 - 58 */
37 OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 59 - 61 */
38 OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 62 - 64 */
39
40 OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 65 - 67 */
41 OPL3_TOMTOM_ON, OPL3_HIHAT_ON, OPL3_HIHAT_ON, /* 68 - 70 */
42 OPL3_HIHAT_ON, OPL3_HIHAT_ON, OPL3_TOMTOM_ON, /* 71 - 73 */
43 OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 74 - 76 */
44 OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 77 - 79 */
45 OPL3_CYMBAL_ON, OPL3_CYMBAL_ON /* 80 - 81 */
46 };
47
48 struct snd_opl3_drum_voice {
49 int voice;
50 int op;
51 unsigned char am_vib;
52 unsigned char ksl_level;
53 unsigned char attack_decay;
54 unsigned char sustain_release;
55 unsigned char feedback_connection;
56 unsigned char wave_select;
57 };
58
59 struct snd_opl3_drum_note {
60 int voice;
61 unsigned char fnum;
62 unsigned char octave_f;
63 unsigned char feedback_connection;
64 };
65
66 static struct snd_opl3_drum_voice bass_op0 = {6, 0, 0x00, 0x32, 0xf8, 0x66, 0x30, 0x00};
67 static struct snd_opl3_drum_voice bass_op1 = {6, 1, 0x00, 0x03, 0xf6, 0x57, 0x30, 0x00};
68 static struct snd_opl3_drum_note bass_note = {6, 0x90, 0x09};
69
70 static struct snd_opl3_drum_voice hihat = {7, 0, 0x00, 0x03, 0xf0, 0x06, 0x20, 0x00};
71
72 static struct snd_opl3_drum_voice snare = {7, 1, 0x00, 0x03, 0xf0, 0x07, 0x20, 0x02};
73 static struct snd_opl3_drum_note snare_note = {7, 0xf4, 0x0d};
74
75 static struct snd_opl3_drum_voice tomtom = {8, 0, 0x02, 0x03, 0xf0, 0x06, 0x10, 0x00};
76 static struct snd_opl3_drum_note tomtom_note = {8, 0xf4, 0x09};
77
78 static struct snd_opl3_drum_voice cymbal = {8, 1, 0x04, 0x03, 0xf0, 0x06, 0x10, 0x00};
79
80 /*
81 * set drum voice characteristics
82 */
83 static void snd_opl3_drum_voice_set(struct snd_opl3 *opl3,
84 struct snd_opl3_drum_voice *data)
85 {
86 unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
87 unsigned char voice_offset = data->voice;
88 unsigned short opl3_reg;
89
90 /* Set OPL3 AM_VIB register */
91 opl3_reg = OPL3_LEFT | (OPL3_REG_AM_VIB + op_offset);
92 opl3->command(opl3, opl3_reg, data->am_vib);
93
94 /* Set OPL3 KSL_LEVEL register */
95 opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
96 opl3->command(opl3, opl3_reg, data->ksl_level);
97
98 /* Set OPL3 ATTACK_DECAY register */
99 opl3_reg = OPL3_LEFT | (OPL3_REG_ATTACK_DECAY + op_offset);
100 opl3->command(opl3, opl3_reg, data->attack_decay);
101
102 /* Set OPL3 SUSTAIN_RELEASE register */
103 opl3_reg = OPL3_LEFT | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
104 opl3->command(opl3, opl3_reg, data->sustain_release);
105
106 /* Set OPL3 FEEDBACK_CONNECTION register */
107 opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
108 opl3->command(opl3, opl3_reg, data->feedback_connection);
109
110 /* Select waveform */
111 opl3_reg = OPL3_LEFT | (OPL3_REG_WAVE_SELECT + op_offset);
112 opl3->command(opl3, opl3_reg, data->wave_select);
113 }
114
115 /*
116 * Set drum voice pitch
117 */
118 static void snd_opl3_drum_note_set(struct snd_opl3 *opl3,
119 struct snd_opl3_drum_note *data)
120 {
121 unsigned char voice_offset = data->voice;
122 unsigned short opl3_reg;
123
124 /* Set OPL3 FNUM_LOW register */
125 opl3_reg = OPL3_LEFT | (OPL3_REG_FNUM_LOW + voice_offset);
126 opl3->command(opl3, opl3_reg, data->fnum);
127
128 /* Set OPL3 KEYON_BLOCK register */
129 opl3_reg = OPL3_LEFT | (OPL3_REG_KEYON_BLOCK + voice_offset);
130 opl3->command(opl3, opl3_reg, data->octave_f);
131 }
132
133 /*
134 * Set drum voice volume and position
135 */
136 static void snd_opl3_drum_vol_set(struct snd_opl3 *opl3,
137 struct snd_opl3_drum_voice *data,
138 int vel, struct snd_midi_channel *chan)
139 {
140 unsigned char op_offset = snd_opl3_regmap[data->voice][data->op];
141 unsigned char voice_offset = data->voice;
142 unsigned char reg_val;
143 unsigned short opl3_reg;
144
145 /* Set OPL3 KSL_LEVEL register */
146 reg_val = data->ksl_level;
147 snd_opl3_calc_volume(®_val, vel, chan);
148 opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset);
149 opl3->command(opl3, opl3_reg, reg_val);
150
151 /* Set OPL3 FEEDBACK_CONNECTION register */
152 /* Set output voice connection */
153 reg_val = data->feedback_connection | OPL3_STEREO_BITS;
154 if (chan->gm_pan < 43)
155 reg_val &= ~OPL3_VOICE_TO_RIGHT;
156 if (chan->gm_pan > 85)
157 reg_val &= ~OPL3_VOICE_TO_LEFT;
158 opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
159 opl3->command(opl3, opl3_reg, reg_val);
160 }
161
162 /*
163 * Loads drum voices at init time
164 */
165 void snd_opl3_load_drums(struct snd_opl3 *opl3)
166 {
167 snd_opl3_drum_voice_set(opl3, &bass_op0);
168 snd_opl3_drum_voice_set(opl3, &bass_op1);
169 snd_opl3_drum_note_set(opl3, &bass_note);
170
171 snd_opl3_drum_voice_set(opl3, &hihat);
172
173 snd_opl3_drum_voice_set(opl3, &snare);
174 snd_opl3_drum_note_set(opl3, &snare_note);
175
176 snd_opl3_drum_voice_set(opl3, &tomtom);
177 snd_opl3_drum_note_set(opl3, &tomtom_note);
178
179 snd_opl3_drum_voice_set(opl3, &cymbal);
180 }
181
182 /*
183 * Switch drum voice on or off
184 */
185 void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int vel, int on_off,
186 struct snd_midi_channel *chan)
187 {
188 unsigned char drum_mask;
189 struct snd_opl3_drum_voice *drum_voice;
190
191 if (!(opl3->drum_reg & OPL3_PERCUSSION_ENABLE))
192 return;
193
194 if ((note < 35) || (note > 81))
195 return;
196 drum_mask = snd_opl3_drum_table[note - 35];
197
198 if (on_off) {
199 switch (drum_mask) {
200 case OPL3_BASSDRUM_ON:
201 drum_voice = &bass_op1;
202 break;
203 case OPL3_HIHAT_ON:
204 drum_voice = &hihat;
205 break;
206 case OPL3_SNAREDRUM_ON:
207 drum_voice = &snare;
208 break;
209 case OPL3_TOMTOM_ON:
210 drum_voice = &tomtom;
211 break;
212 case OPL3_CYMBAL_ON:
213 drum_voice = &cymbal;
214 break;
215 default:
216 drum_voice = &tomtom;
217 }
218
219 snd_opl3_drum_vol_set(opl3, drum_voice, vel, chan);
220 opl3->drum_reg |= drum_mask;
221 } else {
222 opl3->drum_reg &= ~drum_mask;
223 }
224 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
225 opl3->drum_reg);
226 }
227
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