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