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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Midi synth routines for the Emu8k/Emu10k14 *5 * Copyright (C) 1999 Steve Ratcliffe6 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>7 *8 * Contains code based on awe_wave.c by Takashi Iwai9 */10 11#include "emux_voice.h"12#include <linux/slab.h>13 14#ifdef SNDRV_EMUX_USE_RAW_EFFECT15/*16 * effects table17 */18 19#define xoffsetof(type,tag) ((long)(&((type)NULL)->tag) - (long)(NULL))20 21#define parm_offset(tag) xoffsetof(struct soundfont_voice_parm *, tag)22 23#define PARM_IS_BYTE (1 << 0)24#define PARM_IS_WORD (1 << 1)25#define PARM_IS_ALIGNED (3 << 2)26#define PARM_IS_ALIGN_HI (1 << 2)27#define PARM_IS_ALIGN_LO (2 << 2)28#define PARM_IS_SIGNED (1 << 4)29 30#define PARM_WORD (PARM_IS_WORD)31#define PARM_BYTE_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO)32#define PARM_BYTE_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI)33#define PARM_BYTE (PARM_IS_BYTE)34#define PARM_SIGN_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO|PARM_IS_SIGNED)35#define PARM_SIGN_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI|PARM_IS_SIGNED)36 37static struct emux_parm_defs {38 int type; /* byte or word */39 int low, high; /* value range */40 long offset; /* offset in parameter record (-1 = not written) */41 int update; /* flgas for real-time update */42} parm_defs[EMUX_NUM_EFFECTS] = {43 {PARM_WORD, 0, 0x8000, parm_offset(moddelay), 0}, /* env1 delay */44 {PARM_BYTE_LO, 1, 0x80, parm_offset(modatkhld), 0}, /* env1 attack */45 {PARM_BYTE_HI, 0, 0x7e, parm_offset(modatkhld), 0}, /* env1 hold */46 {PARM_BYTE_LO, 1, 0x7f, parm_offset(moddcysus), 0}, /* env1 decay */47 {PARM_BYTE_LO, 1, 0x7f, parm_offset(modrelease), 0}, /* env1 release */48 {PARM_BYTE_HI, 0, 0x7f, parm_offset(moddcysus), 0}, /* env1 sustain */49 {PARM_BYTE_HI, 0, 0xff, parm_offset(pefe), 0}, /* env1 pitch */50 {PARM_BYTE_LO, 0, 0xff, parm_offset(pefe), 0}, /* env1 fc */51 52 {PARM_WORD, 0, 0x8000, parm_offset(voldelay), 0}, /* env2 delay */53 {PARM_BYTE_LO, 1, 0x80, parm_offset(volatkhld), 0}, /* env2 attack */54 {PARM_BYTE_HI, 0, 0x7e, parm_offset(volatkhld), 0}, /* env2 hold */55 {PARM_BYTE_LO, 1, 0x7f, parm_offset(voldcysus), 0}, /* env2 decay */56 {PARM_BYTE_LO, 1, 0x7f, parm_offset(volrelease), 0}, /* env2 release */57 {PARM_BYTE_HI, 0, 0x7f, parm_offset(voldcysus), 0}, /* env2 sustain */58 59 {PARM_WORD, 0, 0x8000, parm_offset(lfo1delay), 0}, /* lfo1 delay */60 {PARM_BYTE_LO, 0, 0xff, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 freq */61 {PARM_SIGN_HI, -128, 127, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 vol */62 {PARM_SIGN_HI, -128, 127, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 pitch */63 {PARM_BYTE_LO, 0, 0xff, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 cutoff */64 65 {PARM_WORD, 0, 0x8000, parm_offset(lfo2delay), 0}, /* lfo2 delay */66 {PARM_BYTE_LO, 0, 0xff, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 freq */67 {PARM_SIGN_HI, -128, 127, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 pitch */68 69 {PARM_WORD, 0, 0xffff, -1, SNDRV_EMUX_UPDATE_PITCH}, /* initial pitch */70 {PARM_BYTE, 0, 0xff, parm_offset(chorus), 0}, /* chorus */71 {PARM_BYTE, 0, 0xff, parm_offset(reverb), 0}, /* reverb */72 {PARM_BYTE, 0, 0xff, parm_offset(cutoff), SNDRV_EMUX_UPDATE_VOLUME}, /* cutoff */73 {PARM_BYTE, 0, 15, parm_offset(filterQ), SNDRV_EMUX_UPDATE_Q}, /* resonance */74 75 {PARM_WORD, 0, 0xffff, -1, 0}, /* sample start */76 {PARM_WORD, 0, 0xffff, -1, 0}, /* loop start */77 {PARM_WORD, 0, 0xffff, -1, 0}, /* loop end */78 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse sample start */79 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop start */80 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop end */81 {PARM_BYTE, 0, 0xff, -1, SNDRV_EMUX_UPDATE_VOLUME}, /* initial attenuation */82};83 84/* set byte effect value */85static void86effect_set_byte(unsigned char *valp, struct snd_midi_channel *chan, int type)87{88 short effect;89 struct snd_emux_effect_table *fx = chan->private;90 91 effect = fx->val[type];92 if (fx->flag[type] == EMUX_FX_FLAG_ADD) {93 if (parm_defs[type].type & PARM_IS_SIGNED)94 effect += *(char*)valp;95 else96 effect += *valp;97 }98 if (effect < parm_defs[type].low)99 effect = parm_defs[type].low;100 else if (effect > parm_defs[type].high)101 effect = parm_defs[type].high;102 *valp = (unsigned char)effect;103}104 105/* set word effect value */106static void107effect_set_word(unsigned short *valp, struct snd_midi_channel *chan, int type)108{109 int effect;110 struct snd_emux_effect_table *fx = chan->private;111 112 effect = *(unsigned short*)&fx->val[type];113 if (fx->flag[type] == EMUX_FX_FLAG_ADD)114 effect += *valp;115 if (effect < parm_defs[type].low)116 effect = parm_defs[type].low;117 else if (effect > parm_defs[type].high)118 effect = parm_defs[type].high;119 *valp = (unsigned short)effect;120}121 122/* address offset */123static int124effect_get_offset(struct snd_midi_channel *chan, int lo, int hi, int mode)125{126 int addr = 0;127 struct snd_emux_effect_table *fx = chan->private;128 129 if (fx->flag[hi])130 addr = (short)fx->val[hi];131 addr = addr << 15;132 if (fx->flag[lo])133 addr += (short)fx->val[lo];134 if (!(mode & SNDRV_SFNT_SAMPLE_8BITS))135 addr /= 2;136 return addr;137}138 139#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)140/* change effects - for OSS sequencer compatibility */141void142snd_emux_send_effect_oss(struct snd_emux_port *port,143 struct snd_midi_channel *chan, int type, int val)144{145 int mode;146 147 if (type & 0x40)148 mode = EMUX_FX_FLAG_OFF;149 else if (type & 0x80)150 mode = EMUX_FX_FLAG_ADD;151 else152 mode = EMUX_FX_FLAG_SET;153 type &= 0x3f;154 155 snd_emux_send_effect(port, chan, type, val, mode);156}157#endif158 159/* Modify the effect value.160 * if update is necessary, call emu8000_control161 */162void163snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,164 int type, int val, int mode)165{166 int i;167 int offset;168 unsigned char *srcp, *origp;169 struct snd_emux *emu;170 struct snd_emux_effect_table *fx;171 unsigned long flags;172 173 emu = port->emu;174 fx = chan->private;175 if (emu == NULL || fx == NULL)176 return;177 if (type < 0 || type >= EMUX_NUM_EFFECTS)178 return;179 180 fx->val[type] = val;181 fx->flag[type] = mode;182 183 /* do we need to modify the register in realtime ? */184 if (!parm_defs[type].update)185 return;186 offset = parm_defs[type].offset;187 if (offset < 0)188 return;189 190#ifdef SNDRV_LITTLE_ENDIAN191 if (parm_defs[type].type & PARM_IS_ALIGN_HI)192 offset++;193#else194 if (parm_defs[type].type & PARM_IS_ALIGN_LO)195 offset++;196#endif197 /* modify the register values */198 spin_lock_irqsave(&emu->voice_lock, flags);199 for (i = 0; i < emu->max_voices; i++) {200 struct snd_emux_voice *vp = &emu->voices[i];201 if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)202 continue;203 srcp = (unsigned char*)&vp->reg.parm + offset;204 origp = (unsigned char*)&vp->zone->v.parm + offset;205 if (parm_defs[i].type & PARM_IS_BYTE) {206 *srcp = *origp;207 effect_set_byte(srcp, chan, type);208 } else {209 *(unsigned short*)srcp = *(unsigned short*)origp;210 effect_set_word((unsigned short*)srcp, chan, type);211 }212 }213 spin_unlock_irqrestore(&emu->voice_lock, flags);214 215 /* activate them */216 snd_emux_update_channel(port, chan, parm_defs[type].update);217}218 219 220/* copy wavetable registers to voice table */221void222snd_emux_setup_effect(struct snd_emux_voice *vp)223{224 struct snd_midi_channel *chan = vp->chan;225 struct snd_emux_effect_table *fx;226 unsigned char *srcp;227 int i;228 229 fx = chan->private;230 if (!fx)231 return;232 233 /* modify the register values via effect table */234 for (i = 0; i < EMUX_FX_END; i++) {235 int offset;236 if (!fx->flag[i])237 continue;238 offset = parm_defs[i].offset;239 if (offset < 0)240 continue;241#ifdef SNDRV_LITTLE_ENDIAN242 if (parm_defs[i].type & PARM_IS_ALIGN_HI)243 offset++;244#else245 if (parm_defs[i].type & PARM_IS_ALIGN_LO)246 offset++;247#endif248 srcp = (unsigned char*)&vp->reg.parm + offset;249 if (parm_defs[i].type & PARM_IS_BYTE)250 effect_set_byte(srcp, chan, i);251 else252 effect_set_word((unsigned short*)srcp, chan, i);253 }254 255 /* correct sample and loop points */256 vp->reg.start += effect_get_offset(chan, EMUX_FX_SAMPLE_START,257 EMUX_FX_COARSE_SAMPLE_START,258 vp->reg.sample_mode);259 260 vp->reg.loopstart += effect_get_offset(chan, EMUX_FX_LOOP_START,261 EMUX_FX_COARSE_LOOP_START,262 vp->reg.sample_mode);263 264 vp->reg.loopend += effect_get_offset(chan, EMUX_FX_LOOP_END,265 EMUX_FX_COARSE_LOOP_END,266 vp->reg.sample_mode);267}268 269/*270 * effect table271 */272void273snd_emux_create_effect(struct snd_emux_port *p)274{275 int i;276 p->effect = kcalloc(p->chset.max_channels,277 sizeof(struct snd_emux_effect_table), GFP_KERNEL);278 if (p->effect) {279 for (i = 0; i < p->chset.max_channels; i++)280 p->chset.channels[i].private = p->effect + i;281 } else {282 for (i = 0; i < p->chset.max_channels; i++)283 p->chset.channels[i].private = NULL;284 }285}286 287void288snd_emux_delete_effect(struct snd_emux_port *p)289{290 kfree(p->effect);291 p->effect = NULL;292}293 294void295snd_emux_clear_effect(struct snd_emux_port *p)296{297 if (p->effect) {298 memset(p->effect, 0, sizeof(struct snd_emux_effect_table) *299 p->chset.max_channels);300 }301}302 303#endif /* SNDRV_EMUX_USE_RAW_EFFECT */304