1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
309 lines
9.2 KiB
C
309 lines
9.2 KiB
C
/*
|
|
* 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
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#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(soundfont_voice_parm_t*, 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, snd_midi_channel_t *chan, int type)
|
|
{
|
|
short effect;
|
|
snd_emux_effect_table_t *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, snd_midi_channel_t *chan, int type)
|
|
{
|
|
int effect;
|
|
snd_emux_effect_table_t *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(snd_midi_channel_t *chan, int lo, int hi, int mode)
|
|
{
|
|
int addr = 0;
|
|
snd_emux_effect_table_t *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;
|
|
}
|
|
|
|
#ifdef CONFIG_SND_SEQUENCER_OSS
|
|
/* change effects - for OSS sequencer compatibility */
|
|
void
|
|
snd_emux_send_effect_oss(snd_emux_port_t *port, snd_midi_channel_t *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(snd_emux_port_t *port, snd_midi_channel_t *chan, int type, int val, int mode)
|
|
{
|
|
int i;
|
|
int offset;
|
|
unsigned char *srcp, *origp;
|
|
snd_emux_t *emu;
|
|
snd_emux_effect_table_t *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++) {
|
|
snd_emux_voice_t *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(snd_emux_voice_t *vp)
|
|
{
|
|
snd_midi_channel_t *chan = vp->chan;
|
|
snd_emux_effect_table_t *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(snd_emux_port_t *p)
|
|
{
|
|
int i;
|
|
p->effect = kcalloc(p->chset.max_channels, sizeof(snd_emux_effect_table_t), 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(snd_emux_port_t *p)
|
|
{
|
|
if (p->effect) {
|
|
kfree(p->effect);
|
|
p->effect = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
snd_emux_clear_effect(snd_emux_port_t *p)
|
|
{
|
|
if (p->effect) {
|
|
memset(p->effect, 0, sizeof(snd_emux_effect_table_t) * p->chset.max_channels);
|
|
}
|
|
}
|
|
|
|
#endif /* SNDRV_EMUX_USE_RAW_EFFECT */
|