Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  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(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;

}

#ifdef 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 */