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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 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) by Uros Bizjak <uros@kss-loka.si> * * OPL2/OPL3/OPL4 FM routines for internal percussion channels */ #include "opl3_voice.h" static const char snd_opl3_drum_table[47] = { OPL3_BASSDRUM_ON, OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, /* 35 - 37 */ OPL3_SNAREDRUM_ON, OPL3_HIHAT_ON, OPL3_SNAREDRUM_ON, /* 38 - 40 */ OPL3_BASSDRUM_ON, OPL3_HIHAT_ON, OPL3_BASSDRUM_ON, /* 41 - 43 */ OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_HIHAT_ON, /* 44 - 46 */ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, /* 47 - 49 */ OPL3_TOMTOM_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 50 - 52 */ OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, OPL3_CYMBAL_ON, /* 53 - 55 */ OPL3_HIHAT_ON, OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, /* 56 - 58 */ OPL3_CYMBAL_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 59 - 61 */ OPL3_HIHAT_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 62 - 64 */ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 65 - 67 */ OPL3_TOMTOM_ON, OPL3_HIHAT_ON, OPL3_HIHAT_ON, /* 68 - 70 */ OPL3_HIHAT_ON, OPL3_HIHAT_ON, OPL3_TOMTOM_ON, /* 71 - 73 */ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 74 - 76 */ OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, OPL3_TOMTOM_ON, /* 77 - 79 */ OPL3_CYMBAL_ON, OPL3_CYMBAL_ON /* 80 - 81 */ }; struct snd_opl3_drum_voice { int voice; int op; unsigned char am_vib; unsigned char ksl_level; unsigned char attack_decay; unsigned char sustain_release; unsigned char feedback_connection; unsigned char wave_select; }; struct snd_opl3_drum_note { int voice; unsigned char fnum; unsigned char octave_f; unsigned char feedback_connection; }; static const struct snd_opl3_drum_voice bass_op0 = {6, 0, 0x00, 0x32, 0xf8, 0x66, 0x30, 0x00}; static const struct snd_opl3_drum_voice bass_op1 = {6, 1, 0x00, 0x03, 0xf6, 0x57, 0x30, 0x00}; static const struct snd_opl3_drum_note bass_note = {6, 0x90, 0x09}; static const struct snd_opl3_drum_voice hihat = {7, 0, 0x00, 0x03, 0xf0, 0x06, 0x20, 0x00}; static const struct snd_opl3_drum_voice snare = {7, 1, 0x00, 0x03, 0xf0, 0x07, 0x20, 0x02}; static const struct snd_opl3_drum_note snare_note = {7, 0xf4, 0x0d}; static const struct snd_opl3_drum_voice tomtom = {8, 0, 0x02, 0x03, 0xf0, 0x06, 0x10, 0x00}; static const struct snd_opl3_drum_note tomtom_note = {8, 0xf4, 0x09}; static const struct snd_opl3_drum_voice cymbal = {8, 1, 0x04, 0x03, 0xf0, 0x06, 0x10, 0x00}; /* * set drum voice characteristics */ static void snd_opl3_drum_voice_set(struct snd_opl3 *opl3, const struct snd_opl3_drum_voice *data) { unsigned char op_offset = snd_opl3_regmap[data->voice][data->op]; unsigned char voice_offset = data->voice; unsigned short opl3_reg; /* Set OPL3 AM_VIB register */ opl3_reg = OPL3_LEFT | (OPL3_REG_AM_VIB + op_offset); opl3->command(opl3, opl3_reg, data->am_vib); /* Set OPL3 KSL_LEVEL register */ opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset); opl3->command(opl3, opl3_reg, data->ksl_level); /* Set OPL3 ATTACK_DECAY register */ opl3_reg = OPL3_LEFT | (OPL3_REG_ATTACK_DECAY + op_offset); opl3->command(opl3, opl3_reg, data->attack_decay); /* Set OPL3 SUSTAIN_RELEASE register */ opl3_reg = OPL3_LEFT | (OPL3_REG_SUSTAIN_RELEASE + op_offset); opl3->command(opl3, opl3_reg, data->sustain_release); /* Set OPL3 FEEDBACK_CONNECTION register */ opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); opl3->command(opl3, opl3_reg, data->feedback_connection); /* Select waveform */ opl3_reg = OPL3_LEFT | (OPL3_REG_WAVE_SELECT + op_offset); opl3->command(opl3, opl3_reg, data->wave_select); } /* * Set drum voice pitch */ static void snd_opl3_drum_note_set(struct snd_opl3 *opl3, const struct snd_opl3_drum_note *data) { unsigned char voice_offset = data->voice; unsigned short opl3_reg; /* Set OPL3 FNUM_LOW register */ opl3_reg = OPL3_LEFT | (OPL3_REG_FNUM_LOW + voice_offset); opl3->command(opl3, opl3_reg, data->fnum); /* Set OPL3 KEYON_BLOCK register */ opl3_reg = OPL3_LEFT | (OPL3_REG_KEYON_BLOCK + voice_offset); opl3->command(opl3, opl3_reg, data->octave_f); } /* * Set drum voice volume and position */ static void snd_opl3_drum_vol_set(struct snd_opl3 *opl3, const struct snd_opl3_drum_voice *data, int vel, struct snd_midi_channel *chan) { unsigned char op_offset = snd_opl3_regmap[data->voice][data->op]; unsigned char voice_offset = data->voice; unsigned char reg_val; unsigned short opl3_reg; /* Set OPL3 KSL_LEVEL register */ reg_val = data->ksl_level; snd_opl3_calc_volume(®_val, vel, chan); opl3_reg = OPL3_LEFT | (OPL3_REG_KSL_LEVEL + op_offset); opl3->command(opl3, opl3_reg, reg_val); /* Set OPL3 FEEDBACK_CONNECTION register */ /* Set output voice connection */ reg_val = data->feedback_connection | OPL3_STEREO_BITS; if (chan->gm_pan < 43) reg_val &= ~OPL3_VOICE_TO_RIGHT; if (chan->gm_pan > 85) reg_val &= ~OPL3_VOICE_TO_LEFT; opl3_reg = OPL3_LEFT | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); opl3->command(opl3, opl3_reg, reg_val); } /* * Loads drum voices at init time */ void snd_opl3_load_drums(struct snd_opl3 *opl3) { snd_opl3_drum_voice_set(opl3, &bass_op0); snd_opl3_drum_voice_set(opl3, &bass_op1); snd_opl3_drum_note_set(opl3, &bass_note); snd_opl3_drum_voice_set(opl3, &hihat); snd_opl3_drum_voice_set(opl3, &snare); snd_opl3_drum_note_set(opl3, &snare_note); snd_opl3_drum_voice_set(opl3, &tomtom); snd_opl3_drum_note_set(opl3, &tomtom_note); snd_opl3_drum_voice_set(opl3, &cymbal); } /* * Switch drum voice on or off */ void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int vel, int on_off, struct snd_midi_channel *chan) { unsigned char drum_mask; const struct snd_opl3_drum_voice *drum_voice; if (!(opl3->drum_reg & OPL3_PERCUSSION_ENABLE)) return; if ((note < 35) || (note > 81)) return; drum_mask = snd_opl3_drum_table[note - 35]; if (on_off) { switch (drum_mask) { case OPL3_BASSDRUM_ON: drum_voice = &bass_op1; break; case OPL3_HIHAT_ON: drum_voice = &hihat; break; case OPL3_SNAREDRUM_ON: drum_voice = &snare; break; case OPL3_TOMTOM_ON: drum_voice = &tomtom; break; case OPL3_CYMBAL_ON: drum_voice = &cymbal; break; default: drum_voice = &tomtom; } snd_opl3_drum_vol_set(opl3, drum_voice, vel, chan); opl3->drum_reg |= drum_mask; } else { opl3->drum_reg &= ~drum_mask; } opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg); } |