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Linux/sound/synth/emux/emux_effect.c

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  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 
 51 static 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 */
 99 static void
100 effect_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 */
120 static void
121 effect_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 */
137 static int
138 effect_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 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
154 /* change effects - for OSS sequencer compatibility */
155 void
156 snd_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  */
176 void
177 snd_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 */
232 void
233 snd_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  */
279 void
280 snd_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 
294 void
295 snd_emux_delete_effect(struct snd_emux_port *p)
296 {
297         kfree(p->effect);
298         p->effect = NULL;
299 }
300 
301 void
302 snd_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 

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