LXR linux/sound/synth/emux/emux

   1/*
   2 *  Midi synth routines for the Emu8k/Emu10k1
   3 *
   4 *  Copyright (C) 1999 Steve Ratcliffe
   5 *  Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
   6 *
   7 *  Contains code based on awe_wave.c by Takashi Iwai
   8 *
   9 *   This program is free software; you can redistribute it and/or modify
  10 *   it under the terms of the GNU General Public License as published by
  11 *   the Free Software Foundation; either version 2 of the License, or
  12 *   (at your option) any later version.
  13 *
  14 *   This program is distributed in the hope that it will be useful,
  15 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 *   GNU General Public License for more details.
  18 *
  19 *   You should have received a copy of the GNU General Public License
  20 *   along with this program; if not, write to the Free Software
  21 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22 *
  23 */
  24
  25#include "emux_voice.h"
  26#include <linux/slab.h>
  27
  28#ifdef SNDRV_EMUX_USE_RAW_EFFECT
  29/*
  30 * effects table
  31 */
  32
  33#define xoffsetof(type,tag)     ((long)(&((type)NULL)->tag) - (long)(NULL))
  34
  35#define parm_offset(tag)        xoffsetof(struct soundfont_voice_parm *, tag)
  36
  37#define PARM_IS_BYTE            (1 << 0)
  38#define PARM_IS_WORD            (1 << 1)
  39#define PARM_IS_ALIGNED         (3 << 2)
  40#define PARM_IS_ALIGN_HI        (1 << 2)
  41#define PARM_IS_ALIGN_LO        (2 << 2)
  42#define PARM_IS_SIGNED          (1 << 4)
  43
  44#define PARM_WORD       (PARM_IS_WORD)
  45#define PARM_BYTE_LO    (PARM_IS_BYTE|PARM_IS_ALIGN_LO)
  46#define PARM_BYTE_HI    (PARM_IS_BYTE|PARM_IS_ALIGN_HI)
  47#define PARM_BYTE       (PARM_IS_BYTE)
  48#define PARM_SIGN_LO    (PARM_IS_BYTE|PARM_IS_ALIGN_LO|PARM_IS_SIGNED)
  49#define PARM_SIGN_HI    (PARM_IS_BYTE|PARM_IS_ALIGN_HI|PARM_IS_SIGNED)
  50
  51static struct emux_parm_defs {
  52        int type;       /* byte or word */
  53        int low, high;  /* value range */
  54        long offset;    /* offset in parameter record (-1 = not written) */
  55        int update;     /* flgas for real-time update */
  56} parm_defs[EMUX_NUM_EFFECTS] = {
  57        {PARM_WORD, 0, 0x8000, parm_offset(moddelay), 0},       /* env1 delay */
  58        {PARM_BYTE_LO, 1, 0x80, parm_offset(modatkhld), 0},     /* env1 attack */
  59        {PARM_BYTE_HI, 0, 0x7e, parm_offset(modatkhld), 0},     /* env1 hold */
  60        {PARM_BYTE_LO, 1, 0x7f, parm_offset(moddcysus), 0},     /* env1 decay */
  61        {PARM_BYTE_LO, 1, 0x7f, parm_offset(modrelease), 0},    /* env1 release */
  62        {PARM_BYTE_HI, 0, 0x7f, parm_offset(moddcysus), 0},     /* env1 sustain */
  63        {PARM_BYTE_HI, 0, 0xff, parm_offset(pefe), 0},  /* env1 pitch */
  64        {PARM_BYTE_LO, 0, 0xff, parm_offset(pefe), 0},  /* env1 fc */
  65
  66        {PARM_WORD, 0, 0x8000, parm_offset(voldelay), 0},       /* env2 delay */
  67        {PARM_BYTE_LO, 1, 0x80, parm_offset(volatkhld), 0},     /* env2 attack */
  68        {PARM_BYTE_HI, 0, 0x7e, parm_offset(volatkhld), 0},     /* env2 hold */
  69        {PARM_BYTE_LO, 1, 0x7f, parm_offset(voldcysus), 0},     /* env2 decay */
  70        {PARM_BYTE_LO, 1, 0x7f, parm_offset(volrelease), 0},    /* env2 release */
  71        {PARM_BYTE_HI, 0, 0x7f, parm_offset(voldcysus), 0},     /* env2 sustain */
  72
  73        {PARM_WORD, 0, 0x8000, parm_offset(lfo1delay), 0},      /* lfo1 delay */
  74        {PARM_BYTE_LO, 0, 0xff, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ},      /* lfo1 freq */
  75        {PARM_SIGN_HI, -128, 127, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ},    /* lfo1 vol */
  76        {PARM_SIGN_HI, -128, 127, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 pitch */
  77        {PARM_BYTE_LO, 0, 0xff, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD},   /* lfo1 cutoff */
  78
  79        {PARM_WORD, 0, 0x8000, parm_offset(lfo2delay), 0},      /* lfo2 delay */
  80        {PARM_BYTE_LO, 0, 0xff, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2},       /* lfo2 freq */
  81        {PARM_SIGN_HI, -128, 127, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2},     /* lfo2 pitch */
  82
  83        {PARM_WORD, 0, 0xffff, -1, SNDRV_EMUX_UPDATE_PITCH},    /* initial pitch */
  84        {PARM_BYTE, 0, 0xff, parm_offset(chorus), 0},   /* chorus */
  85        {PARM_BYTE, 0, 0xff, parm_offset(reverb), 0},   /* reverb */
  86        {PARM_BYTE, 0, 0xff, parm_offset(cutoff), SNDRV_EMUX_UPDATE_VOLUME},    /* cutoff */
  87        {PARM_BYTE, 0, 15, parm_offset(filterQ), SNDRV_EMUX_UPDATE_Q},  /* resonance */
  88
  89        {PARM_WORD, 0, 0xffff, -1, 0},  /* sample start */
  90        {PARM_WORD, 0, 0xffff, -1, 0},  /* loop start */
  91        {PARM_WORD, 0, 0xffff, -1, 0},  /* loop end */
  92        {PARM_WORD, 0, 0xffff, -1, 0},  /* coarse sample start */
  93        {PARM_WORD, 0, 0xffff, -1, 0},  /* coarse loop start */
  94        {PARM_WORD, 0, 0xffff, -1, 0},  /* coarse loop end */
  95        {PARM_BYTE, 0, 0xff, -1, SNDRV_EMUX_UPDATE_VOLUME},     /* initial attenuation */
  96};
  97
  98/* set byte effect value */
  99static void
 100effect_set_byte(unsigned char *valp, struct snd_midi_channel *chan, int type)
 101{
 102        short effect;
 103        struct snd_emux_effect_table *fx = chan->private;
 104
 105        effect = fx->val[type];
 106        if (fx->flag[type] == EMUX_FX_FLAG_ADD) {
 107                if (parm_defs[type].type & PARM_IS_SIGNED)
 108                        effect += *(char*)valp;
 109                else
 110                        effect += *valp;
 111        }
 112        if (effect < parm_defs[type].low)
 113                effect = parm_defs[type].low;
 114        else if (effect > parm_defs[type].high)
 115                effect = parm_defs[type].high;
 116        *valp = (unsigned char)effect;
 117}
 118
 119/* set word effect value */
 120static void
 121effect_set_word(unsigned short *valp, struct snd_midi_channel *chan, int type)
 122{
 123        int effect;
 124        struct snd_emux_effect_table *fx = chan->private;
 125
 126        effect = *(unsigned short*)&fx->val[type];
 127        if (fx->flag[type] == EMUX_FX_FLAG_ADD)
 128                effect += *valp;
 129        if (effect < parm_defs[type].low)
 130                effect = parm_defs[type].low;
 131        else if (effect > parm_defs[type].high)
 132                effect = parm_defs[type].high;
 133        *valp = (unsigned short)effect;
 134}
 135
 136/* address offset */
 137static int
 138effect_get_offset(struct snd_midi_channel *chan, int lo, int hi, int mode)
 139{
 140        int addr = 0;
 141        struct snd_emux_effect_table *fx = chan->private;
 142
 143        if (fx->flag[hi])
 144                addr = (short)fx->val[hi];
 145        addr = addr << 15;
 146        if (fx->flag[lo])
 147                addr += (short)fx->val[lo];
 148        if (!(mode & SNDRV_SFNT_SAMPLE_8BITS))
 149                addr /= 2;
 150        return addr;
 151}
 152
 153#ifdef CONFIG_SND_SEQUENCER_OSS
 154/* change effects - for OSS sequencer compatibility */
 155void
 156snd_emux_send_effect_oss(struct snd_emux_port *port,
 157                         struct snd_midi_channel *chan, int type, int val)
 158{
 159        int mode;
 160
 161        if (type & 0x40)
 162                mode = EMUX_FX_FLAG_OFF;
 163        else if (type & 0x80)
 164                mode = EMUX_FX_FLAG_ADD;
 165        else
 166                mode = EMUX_FX_FLAG_SET;
 167        type &= 0x3f;
 168
 169        snd_emux_send_effect(port, chan, type, val, mode);
 170}
 171#endif
 172
 173/* Modify the effect value.
 174 * if update is necessary, call emu8000_control
 175 */
 176void
 177snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
 178                     int type, int val, int mode)
 179{
 180        int i;
 181        int offset;
 182        unsigned char *srcp, *origp;
 183        struct snd_emux *emu;
 184        struct snd_emux_effect_table *fx;
 185        unsigned long flags;
 186
 187        emu = port->emu;
 188        fx = chan->private;
 189        if (emu == NULL || fx == NULL)
 190                return;
 191        if (type < 0 || type >= EMUX_NUM_EFFECTS)
 192                return;
 193
 194        fx->val[type] = val;
 195        fx->flag[type] = mode;
 196
 197        /* do we need to modify the register in realtime ? */
 198        if (! parm_defs[type].update || (offset = parm_defs[type].offset) < 0)
 199                return;
 200
 201#ifdef SNDRV_LITTLE_ENDIAN
 202        if (parm_defs[type].type & PARM_IS_ALIGN_HI)
 203                offset++;
 204#else
 205        if (parm_defs[type].type & PARM_IS_ALIGN_LO)
 206                offset++;
 207#endif
 208        /* modify the register values */
 209        spin_lock_irqsave(&emu->voice_lock, flags);
 210        for (i = 0; i < emu->max_voices; i++) {
 211                struct snd_emux_voice *vp = &emu->voices[i];
 212                if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
 213                        continue;
 214                srcp = (unsigned char*)&vp->reg.parm + offset;
 215                origp = (unsigned char*)&vp->zone->v.parm + offset;
 216                if (parm_defs[i].type & PARM_IS_BYTE) {
 217                        *srcp = *origp;
 218                        effect_set_byte(srcp, chan, type);
 219                } else {
 220                        *(unsigned short*)srcp = *(unsigned short*)origp;
 221                        effect_set_word((unsigned short*)srcp, chan, type);
 222                }
 223        }
 224        spin_unlock_irqrestore(&emu->voice_lock, flags);
 225
 226        /* activate them */
 227        snd_emux_update_channel(port, chan, parm_defs[type].update);
 228}
 229
 230
 231/* copy wavetable registers to voice table */
 232void
 233snd_emux_setup_effect(struct snd_emux_voice *vp)
 234{
 235        struct snd_midi_channel *chan = vp->chan;
 236        struct snd_emux_effect_table *fx;
 237        unsigned char *srcp;
 238        int i;
 239
 240        if (! (fx = chan->private))
 241                return;
 242
 243        /* modify the register values via effect table */
 244        for (i = 0; i < EMUX_FX_END; i++) {
 245                int offset;
 246                if (! fx->flag[i] || (offset = parm_defs[i].offset) < 0)
 247                        continue;
 248#ifdef SNDRV_LITTLE_ENDIAN
 249                if (parm_defs[i].type & PARM_IS_ALIGN_HI)
 250                        offset++;
 251#else
 252                if (parm_defs[i].type & PARM_IS_ALIGN_LO)
 253                        offset++;
 254#endif
 255                srcp = (unsigned char*)&vp->reg.parm + offset;
 256                if (parm_defs[i].type & PARM_IS_BYTE)
 257                        effect_set_byte(srcp, chan, i);
 258                else
 259                        effect_set_word((unsigned short*)srcp, chan, i);
 260        }
 261
 262        /* correct sample and loop points */
 263        vp->reg.start += effect_get_offset(chan, EMUX_FX_SAMPLE_START,
 264                                           EMUX_FX_COARSE_SAMPLE_START,
 265                                           vp->reg.sample_mode);
 266
 267        vp->reg.loopstart += effect_get_offset(chan, EMUX_FX_LOOP_START,
 268                                               EMUX_FX_COARSE_LOOP_START,
 269                                               vp->reg.sample_mode);
 270
 271        vp->reg.loopend += effect_get_offset(chan, EMUX_FX_LOOP_END,
 272                                             EMUX_FX_COARSE_LOOP_END,
 273                                             vp->reg.sample_mode);
 274}
 275
 276/*
 277 * effect table
 278 */
 279void
 280snd_emux_create_effect(struct snd_emux_port *p)
 281{
 282        int i;
 283        p->effect = kcalloc(p->chset.max_channels,
 284                            sizeof(struct snd_emux_effect_table), GFP_KERNEL);
 285        if (p->effect) {
 286                for (i = 0; i < p->chset.max_channels; i++)
 287                        p->chset.channels[i].private = p->effect + i;
 288        } else {
 289                for (i = 0; i < p->chset.max_channels; i++)
 290                        p->chset.channels[i].private = NULL;
 291        }
 292}
 293
 294void
 295snd_emux_delete_effect(struct snd_emux_port *p)
 296{
 297        kfree(p->effect);
 298        p->effect = NULL;
 299}
 300
 301void
 302snd_emux_clear_effect(struct snd_emux_port *p)
 303{
 304        if (p->effect) {
 305                memset(p->effect, 0, sizeof(struct snd_emux_effect_table) *
 306                       p->chset.max_channels);
 307        }
 308}
 309
 310#endif /* SNDRV_EMUX_USE_RAW_EFFECT */
 311