LXR linux/sound/synth/emux/emux

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  Midi synth routines for the Emu8k/Emu10k1
   4 *
   5 *  Copyright (C) 1999 Steve Ratcliffe
   6 *  Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
   7 *
   8 *  Contains code based on awe_wave.c by Takashi Iwai
   9 */
  10
  11#include "emux_voice.h"
  12#include <linux/slab.h>
  13
  14#ifdef SNDRV_EMUX_USE_RAW_EFFECT
  15/*
  16 * effects table
  17 */
  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 void
  86effect_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                else
  96                        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 void
 107effect_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 int
 124effect_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 */
 141void
 142snd_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        else
 152                mode = EMUX_FX_FLAG_SET;
 153        type &= 0x3f;
 154
 155        snd_emux_send_effect(port, chan, type, val, mode);
 156}
 157#endif
 158
 159/* Modify the effect value.
 160 * if update is necessary, call emu8000_control
 161 */
 162void
 163snd_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 || (offset = parm_defs[type].offset) < 0)
 185                return;
 186
 187#ifdef SNDRV_LITTLE_ENDIAN
 188        if (parm_defs[type].type & PARM_IS_ALIGN_HI)
 189                offset++;
 190#else
 191        if (parm_defs[type].type & PARM_IS_ALIGN_LO)
 192                offset++;
 193#endif
 194        /* modify the register values */
 195        spin_lock_irqsave(&emu->voice_lock, flags);
 196        for (i = 0; i < emu->max_voices; i++) {
 197                struct snd_emux_voice *vp = &emu->voices[i];
 198                if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
 199                        continue;
 200                srcp = (unsigned char*)&vp->reg.parm + offset;
 201                origp = (unsigned char*)&vp->zone->v.parm + offset;
 202                if (parm_defs[i].type & PARM_IS_BYTE) {
 203                        *srcp = *origp;
 204                        effect_set_byte(srcp, chan, type);
 205                } else {
 206                        *(unsigned short*)srcp = *(unsigned short*)origp;
 207                        effect_set_word((unsigned short*)srcp, chan, type);
 208                }
 209        }
 210        spin_unlock_irqrestore(&emu->voice_lock, flags);
 211
 212        /* activate them */
 213        snd_emux_update_channel(port, chan, parm_defs[type].update);
 214}
 215
 216
 217/* copy wavetable registers to voice table */
 218void
 219snd_emux_setup_effect(struct snd_emux_voice *vp)
 220{
 221        struct snd_midi_channel *chan = vp->chan;
 222        struct snd_emux_effect_table *fx;
 223        unsigned char *srcp;
 224        int i;
 225
 226        if (! (fx = chan->private))
 227                return;
 228
 229        /* modify the register values via effect table */
 230        for (i = 0; i < EMUX_FX_END; i++) {
 231                int offset;
 232                if (! fx->flag[i] || (offset = parm_defs[i].offset) < 0)
 233                        continue;
 234#ifdef SNDRV_LITTLE_ENDIAN
 235                if (parm_defs[i].type & PARM_IS_ALIGN_HI)
 236                        offset++;
 237#else
 238                if (parm_defs[i].type & PARM_IS_ALIGN_LO)
 239                        offset++;
 240#endif
 241                srcp = (unsigned char*)&vp->reg.parm + offset;
 242                if (parm_defs[i].type & PARM_IS_BYTE)
 243                        effect_set_byte(srcp, chan, i);
 244                else
 245                        effect_set_word((unsigned short*)srcp, chan, i);
 246        }
 247
 248        /* correct sample and loop points */
 249        vp->reg.start += effect_get_offset(chan, EMUX_FX_SAMPLE_START,
 250                                           EMUX_FX_COARSE_SAMPLE_START,
 251                                           vp->reg.sample_mode);
 252
 253        vp->reg.loopstart += effect_get_offset(chan, EMUX_FX_LOOP_START,
 254                                               EMUX_FX_COARSE_LOOP_START,
 255                                               vp->reg.sample_mode);
 256
 257        vp->reg.loopend += effect_get_offset(chan, EMUX_FX_LOOP_END,
 258                                             EMUX_FX_COARSE_LOOP_END,
 259                                             vp->reg.sample_mode);
 260}
 261
 262/*
 263 * effect table
 264 */
 265void
 266snd_emux_create_effect(struct snd_emux_port *p)
 267{
 268        int i;
 269        p->effect = kcalloc(p->chset.max_channels,
 270                            sizeof(struct snd_emux_effect_table), GFP_KERNEL);
 271        if (p->effect) {
 272                for (i = 0; i < p->chset.max_channels; i++)
 273                        p->chset.channels[i].private = p->effect + i;
 274        } else {
 275                for (i = 0; i < p->chset.max_channels; i++)
 276                        p->chset.channels[i].private = NULL;
 277        }
 278}
 279
 280void
 281snd_emux_delete_effect(struct snd_emux_port *p)
 282{
 283        kfree(p->effect);
 284        p->effect = NULL;
 285}
 286
 287void
 288snd_emux_clear_effect(struct snd_emux_port *p)
 289{
 290        if (p->effect) {
 291                memset(p->effect, 0, sizeof(struct snd_emux_effect_table) *
 292                       p->chset.max_channels);
 293        }
 294}
 295
 296#endif /* SNDRV_EMUX_USE_RAW_EFFECT */
 297