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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Midi synth routines for the Emu8k/Emu10k1
*
* Copyright (C) 1999 Steve Ratcliffe
* Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
*
* Contains code based on awe_wave.c by Takashi Iwai
*/
#include "emux_voice.h"
#include <linux/slab.h>
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
/*
* effects table
*/
#define xoffsetof(type,tag) ((long)(&((type)NULL)->tag) - (long)(NULL))
#define parm_offset(tag) xoffsetof(struct soundfont_voice_parm *, tag)
#define PARM_IS_BYTE (1 << 0)
#define PARM_IS_WORD (1 << 1)
#define PARM_IS_ALIGNED (3 << 2)
#define PARM_IS_ALIGN_HI (1 << 2)
#define PARM_IS_ALIGN_LO (2 << 2)
#define PARM_IS_SIGNED (1 << 4)
#define PARM_WORD (PARM_IS_WORD)
#define PARM_BYTE_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO)
#define PARM_BYTE_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI)
#define PARM_BYTE (PARM_IS_BYTE)
#define PARM_SIGN_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO|PARM_IS_SIGNED)
#define PARM_SIGN_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI|PARM_IS_SIGNED)
static struct emux_parm_defs {
int type; /* byte or word */
int low, high; /* value range */
long offset; /* offset in parameter record (-1 = not written) */
int update; /* flgas for real-time update */
} parm_defs[EMUX_NUM_EFFECTS] = {
{PARM_WORD, 0, 0x8000, parm_offset(moddelay), 0}, /* env1 delay */
{PARM_BYTE_LO, 1, 0x80, parm_offset(modatkhld), 0}, /* env1 attack */
{PARM_BYTE_HI, 0, 0x7e, parm_offset(modatkhld), 0}, /* env1 hold */
{PARM_BYTE_LO, 1, 0x7f, parm_offset(moddcysus), 0}, /* env1 decay */
{PARM_BYTE_LO, 1, 0x7f, parm_offset(modrelease), 0}, /* env1 release */
{PARM_BYTE_HI, 0, 0x7f, parm_offset(moddcysus), 0}, /* env1 sustain */
{PARM_BYTE_HI, 0, 0xff, parm_offset(pefe), 0}, /* env1 pitch */
{PARM_BYTE_LO, 0, 0xff, parm_offset(pefe), 0}, /* env1 fc */
{PARM_WORD, 0, 0x8000, parm_offset(voldelay), 0}, /* env2 delay */
{PARM_BYTE_LO, 1, 0x80, parm_offset(volatkhld), 0}, /* env2 attack */
{PARM_BYTE_HI, 0, 0x7e, parm_offset(volatkhld), 0}, /* env2 hold */
{PARM_BYTE_LO, 1, 0x7f, parm_offset(voldcysus), 0}, /* env2 decay */
{PARM_BYTE_LO, 1, 0x7f, parm_offset(volrelease), 0}, /* env2 release */
{PARM_BYTE_HI, 0, 0x7f, parm_offset(voldcysus), 0}, /* env2 sustain */
{PARM_WORD, 0, 0x8000, parm_offset(lfo1delay), 0}, /* lfo1 delay */
{PARM_BYTE_LO, 0, 0xff, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 freq */
{PARM_SIGN_HI, -128, 127, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 vol */
{PARM_SIGN_HI, -128, 127, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 pitch */
{PARM_BYTE_LO, 0, 0xff, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 cutoff */
{PARM_WORD, 0, 0x8000, parm_offset(lfo2delay), 0}, /* lfo2 delay */
{PARM_BYTE_LO, 0, 0xff, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 freq */
{PARM_SIGN_HI, -128, 127, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 pitch */
{PARM_WORD, 0, 0xffff, -1, SNDRV_EMUX_UPDATE_PITCH}, /* initial pitch */
{PARM_BYTE, 0, 0xff, parm_offset(chorus), 0}, /* chorus */
{PARM_BYTE, 0, 0xff, parm_offset(reverb), 0}, /* reverb */
{PARM_BYTE, 0, 0xff, parm_offset(cutoff), SNDRV_EMUX_UPDATE_VOLUME}, /* cutoff */
{PARM_BYTE, 0, 15, parm_offset(filterQ), SNDRV_EMUX_UPDATE_Q}, /* resonance */
{PARM_WORD, 0, 0xffff, -1, 0}, /* sample start */
{PARM_WORD, 0, 0xffff, -1, 0}, /* loop start */
{PARM_WORD, 0, 0xffff, -1, 0}, /* loop end */
{PARM_WORD, 0, 0xffff, -1, 0}, /* coarse sample start */
{PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop start */
{PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop end */
{PARM_BYTE, 0, 0xff, -1, SNDRV_EMUX_UPDATE_VOLUME}, /* initial attenuation */
};
/* set byte effect value */
static void
effect_set_byte(unsigned char *valp, struct snd_midi_channel *chan, int type)
{
short effect;
struct snd_emux_effect_table *fx = chan->private;
effect = fx->val[type];
if (fx->flag[type] == EMUX_FX_FLAG_ADD) {
if (parm_defs[type].type & PARM_IS_SIGNED)
effect += *(char*)valp;
else
effect += *valp;
}
if (effect < parm_defs[type].low)
effect = parm_defs[type].low;
else if (effect > parm_defs[type].high)
effect = parm_defs[type].high;
*valp = (unsigned char)effect;
}
/* set word effect value */
static void
effect_set_word(unsigned short *valp, struct snd_midi_channel *chan, int type)
{
int effect;
struct snd_emux_effect_table *fx = chan->private;
effect = *(unsigned short*)&fx->val[type];
if (fx->flag[type] == EMUX_FX_FLAG_ADD)
effect += *valp;
if (effect < parm_defs[type].low)
effect = parm_defs[type].low;
else if (effect > parm_defs[type].high)
effect = parm_defs[type].high;
*valp = (unsigned short)effect;
}
/* address offset */
static int
effect_get_offset(struct snd_midi_channel *chan, int lo, int hi, int mode)
{
int addr = 0;
struct snd_emux_effect_table *fx = chan->private;
if (fx->flag[hi])
addr = (short)fx->val[hi];
addr = addr << 15;
if (fx->flag[lo])
addr += (short)fx->val[lo];
if (!(mode & SNDRV_SFNT_SAMPLE_8BITS))
addr /= 2;
return addr;
}
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
/* change effects - for OSS sequencer compatibility */
void
snd_emux_send_effect_oss(struct snd_emux_port *port,
struct snd_midi_channel *chan, int type, int val)
{
int mode;
if (type & 0x40)
mode = EMUX_FX_FLAG_OFF;
else if (type & 0x80)
mode = EMUX_FX_FLAG_ADD;
else
mode = EMUX_FX_FLAG_SET;
type &= 0x3f;
snd_emux_send_effect(port, chan, type, val, mode);
}
#endif
/* Modify the effect value.
* if update is necessary, call emu8000_control
*/
void
snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
int type, int val, int mode)
{
int i;
int offset;
unsigned char *srcp, *origp;
struct snd_emux *emu;
struct snd_emux_effect_table *fx;
unsigned long flags;
emu = port->emu;
fx = chan->private;
if (emu == NULL || fx == NULL)
return;
if (type < 0 || type >= EMUX_NUM_EFFECTS)
return;
fx->val[type] = val;
fx->flag[type] = mode;
/* do we need to modify the register in realtime ? */
if (! parm_defs[type].update || (offset = parm_defs[type].offset) < 0)
return;
#ifdef SNDRV_LITTLE_ENDIAN
if (parm_defs[type].type & PARM_IS_ALIGN_HI)
offset++;
#else
if (parm_defs[type].type & PARM_IS_ALIGN_LO)
offset++;
#endif
/* modify the register values */
spin_lock_irqsave(&emu->voice_lock, flags);
for (i = 0; i < emu->max_voices; i++) {
struct snd_emux_voice *vp = &emu->voices[i];
if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
continue;
srcp = (unsigned char*)&vp->reg.parm + offset;
origp = (unsigned char*)&vp->zone->v.parm + offset;
if (parm_defs[i].type & PARM_IS_BYTE) {
*srcp = *origp;
effect_set_byte(srcp, chan, type);
} else {
*(unsigned short*)srcp = *(unsigned short*)origp;
effect_set_word((unsigned short*)srcp, chan, type);
}
}
spin_unlock_irqrestore(&emu->voice_lock, flags);
/* activate them */
snd_emux_update_channel(port, chan, parm_defs[type].update);
}
/* copy wavetable registers to voice table */
void
snd_emux_setup_effect(struct snd_emux_voice *vp)
{
struct snd_midi_channel *chan = vp->chan;
struct snd_emux_effect_table *fx;
unsigned char *srcp;
int i;
if (! (fx = chan->private))
return;
/* modify the register values via effect table */
for (i = 0; i < EMUX_FX_END; i++) {
int offset;
if (! fx->flag[i] || (offset = parm_defs[i].offset) < 0)
continue;
#ifdef SNDRV_LITTLE_ENDIAN
if (parm_defs[i].type & PARM_IS_ALIGN_HI)
offset++;
#else
if (parm_defs[i].type & PARM_IS_ALIGN_LO)
offset++;
#endif
srcp = (unsigned char*)&vp->reg.parm + offset;
if (parm_defs[i].type & PARM_IS_BYTE)
effect_set_byte(srcp, chan, i);
else
effect_set_word((unsigned short*)srcp, chan, i);
}
/* correct sample and loop points */
vp->reg.start += effect_get_offset(chan, EMUX_FX_SAMPLE_START,
EMUX_FX_COARSE_SAMPLE_START,
vp->reg.sample_mode);
vp->reg.loopstart += effect_get_offset(chan, EMUX_FX_LOOP_START,
EMUX_FX_COARSE_LOOP_START,
vp->reg.sample_mode);
vp->reg.loopend += effect_get_offset(chan, EMUX_FX_LOOP_END,
EMUX_FX_COARSE_LOOP_END,
vp->reg.sample_mode);
}
/*
* effect table
*/
void
snd_emux_create_effect(struct snd_emux_port *p)
{
int i;
p->effect = kcalloc(p->chset.max_channels,
sizeof(struct snd_emux_effect_table), GFP_KERNEL);
if (p->effect) {
for (i = 0; i < p->chset.max_channels; i++)
p->chset.channels[i].private = p->effect + i;
} else {
for (i = 0; i < p->chset.max_channels; i++)
p->chset.channels[i].private = NULL;
}
}
void
snd_emux_delete_effect(struct snd_emux_port *p)
{
kfree(p->effect);
p->effect = NULL;
}
void
snd_emux_clear_effect(struct snd_emux_port *p)
{
if (p->effect) {
memset(p->effect, 0, sizeof(struct snd_emux_effect_table) *
p->chset.max_channels);
}
}
#endif /* SNDRV_EMUX_USE_RAW_EFFECT */
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