1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Midi synth routines for the Emu8k/Emu10k1
4 *
5 * Copyright (C) 1999 Steve Ratcliffe
6 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
7 *
8 * Contains code based on awe_wave.c by Takashi Iwai
9 */
10
11 #include "emux_voice.h"
12 #include <linux/slab.h>
13
14 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
15 /*
16 * effects table
17 */
18
19 #define xoffsetof(type,tag) ((long)(&((type)NULL)->tag) - (long)(NULL))
20
21 #define parm_offset(tag) xoffsetof(struct soundfont_voice_parm *, tag)
22
23 #define PARM_IS_BYTE (1 << 0)
24 #define PARM_IS_WORD (1 << 1)
25 #define PARM_IS_ALIGNED (3 << 2)
26 #define PARM_IS_ALIGN_HI (1 << 2)
27 #define PARM_IS_ALIGN_LO (2 << 2)
28 #define PARM_IS_SIGNED (1 << 4)
29
30 #define PARM_WORD (PARM_IS_WORD)
31 #define PARM_BYTE_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO)
32 #define PARM_BYTE_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI)
33 #define PARM_BYTE (PARM_IS_BYTE)
34 #define PARM_SIGN_LO (PARM_IS_BYTE|PARM_IS_ALIGN_LO|PARM_IS_SIGNED)
35 #define PARM_SIGN_HI (PARM_IS_BYTE|PARM_IS_ALIGN_HI|PARM_IS_SIGNED)
36
37 static struct emux_parm_defs {
38 int type; /* byte or word */
39 int low, high; /* value range */
40 long offset; /* offset in parameter record (-1 = not written) */
41 int update; /* flgas for real-time update */
42 } parm_defs[EMUX_NUM_EFFECTS] = {
43 {PARM_WORD, 0, 0x8000, parm_offset(moddelay), 0}, /* env1 delay */
44 {PARM_BYTE_LO, 1, 0x80, parm_offset(modatkhld), 0}, /* env1 attack */
45 {PARM_BYTE_HI, 0, 0x7e, parm_offset(modatkhld), 0}, /* env1 hold */
46 {PARM_BYTE_LO, 1, 0x7f, parm_offset(moddcysus), 0}, /* env1 decay */
47 {PARM_BYTE_LO, 1, 0x7f, parm_offset(modrelease), 0}, /* env1 release */
48 {PARM_BYTE_HI, 0, 0x7f, parm_offset(moddcysus), 0}, /* env1 sustain */
49 {PARM_BYTE_HI, 0, 0xff, parm_offset(pefe), 0}, /* env1 pitch */
50 {PARM_BYTE_LO, 0, 0xff, parm_offset(pefe), 0}, /* env1 fc */
51
52 {PARM_WORD, 0, 0x8000, parm_offset(voldelay), 0}, /* env2 delay */
53 {PARM_BYTE_LO, 1, 0x80, parm_offset(volatkhld), 0}, /* env2 attack */
54 {PARM_BYTE_HI, 0, 0x7e, parm_offset(volatkhld), 0}, /* env2 hold */
55 {PARM_BYTE_LO, 1, 0x7f, parm_offset(voldcysus), 0}, /* env2 decay */
56 {PARM_BYTE_LO, 1, 0x7f, parm_offset(volrelease), 0}, /* env2 release */
57 {PARM_BYTE_HI, 0, 0x7f, parm_offset(voldcysus), 0}, /* env2 sustain */
58
59 {PARM_WORD, 0, 0x8000, parm_offset(lfo1delay), 0}, /* lfo1 delay */
60 {PARM_BYTE_LO, 0, 0xff, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 freq */
61 {PARM_SIGN_HI, -128, 127, parm_offset(tremfrq), SNDRV_EMUX_UPDATE_TREMFREQ}, /* lfo1 vol */
62 {PARM_SIGN_HI, -128, 127, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 pitch */
63 {PARM_BYTE_LO, 0, 0xff, parm_offset(fmmod), SNDRV_EMUX_UPDATE_FMMOD}, /* lfo1 cutoff */
64
65 {PARM_WORD, 0, 0x8000, parm_offset(lfo2delay), 0}, /* lfo2 delay */
66 {PARM_BYTE_LO, 0, 0xff, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 freq */
67 {PARM_SIGN_HI, -128, 127, parm_offset(fm2frq2), SNDRV_EMUX_UPDATE_FM2FRQ2}, /* lfo2 pitch */
68
69 {PARM_WORD, 0, 0xffff, -1, SNDRV_EMUX_UPDATE_PITCH}, /* initial pitch */
70 {PARM_BYTE, 0, 0xff, parm_offset(chorus), 0}, /* chorus */
71 {PARM_BYTE, 0, 0xff, parm_offset(reverb), 0}, /* reverb */
72 {PARM_BYTE, 0, 0xff, parm_offset(cutoff), SNDRV_EMUX_UPDATE_VOLUME}, /* cutoff */
73 {PARM_BYTE, 0, 15, parm_offset(filterQ), SNDRV_EMUX_UPDATE_Q}, /* resonance */
74
75 {PARM_WORD, 0, 0xffff, -1, 0}, /* sample start */
76 {PARM_WORD, 0, 0xffff, -1, 0}, /* loop start */
77 {PARM_WORD, 0, 0xffff, -1, 0}, /* loop end */
78 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse sample start */
79 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop start */
80 {PARM_WORD, 0, 0xffff, -1, 0}, /* coarse loop end */
81 {PARM_BYTE, 0, 0xff, -1, SNDRV_EMUX_UPDATE_VOLUME}, /* initial attenuation */
82 };
83
84 /* set byte effect value */
85 static void
effect_set_byte(unsigned char * valp,struct snd_midi_channel * chan,int type)86 effect_set_byte(unsigned char *valp, struct snd_midi_channel *chan, int type)
87 {
88 short effect;
89 struct snd_emux_effect_table *fx = chan->private;
90
91 effect = fx->val[type];
92 if (fx->flag[type] == EMUX_FX_FLAG_ADD) {
93 if (parm_defs[type].type & PARM_IS_SIGNED)
94 effect += *(char*)valp;
95 else
96 effect += *valp;
97 }
98 if (effect < parm_defs[type].low)
99 effect = parm_defs[type].low;
100 else if (effect > parm_defs[type].high)
101 effect = parm_defs[type].high;
102 *valp = (unsigned char)effect;
103 }
104
105 /* set word effect value */
106 static void
effect_set_word(unsigned short * valp,struct snd_midi_channel * chan,int type)107 effect_set_word(unsigned short *valp, struct snd_midi_channel *chan, int type)
108 {
109 int effect;
110 struct snd_emux_effect_table *fx = chan->private;
111
112 effect = *(unsigned short*)&fx->val[type];
113 if (fx->flag[type] == EMUX_FX_FLAG_ADD)
114 effect += *valp;
115 if (effect < parm_defs[type].low)
116 effect = parm_defs[type].low;
117 else if (effect > parm_defs[type].high)
118 effect = parm_defs[type].high;
119 *valp = (unsigned short)effect;
120 }
121
122 /* address offset */
123 static int
effect_get_offset(struct snd_midi_channel * chan,int lo,int hi,int mode)124 effect_get_offset(struct snd_midi_channel *chan, int lo, int hi, int mode)
125 {
126 int addr = 0;
127 struct snd_emux_effect_table *fx = chan->private;
128
129 if (fx->flag[hi])
130 addr = (short)fx->val[hi];
131 addr = addr << 15;
132 if (fx->flag[lo])
133 addr += (short)fx->val[lo];
134 if (!(mode & SNDRV_SFNT_SAMPLE_8BITS))
135 addr /= 2;
136 return addr;
137 }
138
139 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
140 /* change effects - for OSS sequencer compatibility */
141 void
snd_emux_send_effect_oss(struct snd_emux_port * port,struct snd_midi_channel * chan,int type,int val)142 snd_emux_send_effect_oss(struct snd_emux_port *port,
143 struct snd_midi_channel *chan, int type, int val)
144 {
145 int mode;
146
147 if (type & 0x40)
148 mode = EMUX_FX_FLAG_OFF;
149 else if (type & 0x80)
150 mode = EMUX_FX_FLAG_ADD;
151 else
152 mode = EMUX_FX_FLAG_SET;
153 type &= 0x3f;
154
155 snd_emux_send_effect(port, chan, type, val, mode);
156 }
157 #endif
158
159 /* Modify the effect value.
160 * if update is necessary, call emu8000_control
161 */
162 void
snd_emux_send_effect(struct snd_emux_port * port,struct snd_midi_channel * chan,int type,int val,int mode)163 snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
164 int type, int val, int mode)
165 {
166 int i;
167 int offset;
168 unsigned char *srcp, *origp;
169 struct snd_emux *emu;
170 struct snd_emux_effect_table *fx;
171 unsigned long flags;
172
173 emu = port->emu;
174 fx = chan->private;
175 if (emu == NULL || fx == NULL)
176 return;
177 if (type < 0 || type >= EMUX_NUM_EFFECTS)
178 return;
179
180 fx->val[type] = val;
181 fx->flag[type] = mode;
182
183 /* do we need to modify the register in realtime ? */
184 if (!parm_defs[type].update)
185 return;
186 offset = parm_defs[type].offset;
187 if (offset < 0)
188 return;
189
190 #ifdef SNDRV_LITTLE_ENDIAN
191 if (parm_defs[type].type & PARM_IS_ALIGN_HI)
192 offset++;
193 #else
194 if (parm_defs[type].type & PARM_IS_ALIGN_LO)
195 offset++;
196 #endif
197 /* modify the register values */
198 spin_lock_irqsave(&emu->voice_lock, flags);
199 for (i = 0; i < emu->max_voices; i++) {
200 struct snd_emux_voice *vp = &emu->voices[i];
201 if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
202 continue;
203 srcp = (unsigned char*)&vp->reg.parm + offset;
204 origp = (unsigned char*)&vp->zone->v.parm + offset;
205 if (parm_defs[i].type & PARM_IS_BYTE) {
206 *srcp = *origp;
207 effect_set_byte(srcp, chan, type);
208 } else {
209 *(unsigned short*)srcp = *(unsigned short*)origp;
210 effect_set_word((unsigned short*)srcp, chan, type);
211 }
212 }
213 spin_unlock_irqrestore(&emu->voice_lock, flags);
214
215 /* activate them */
216 snd_emux_update_channel(port, chan, parm_defs[type].update);
217 }
218
219
220 /* copy wavetable registers to voice table */
221 void
snd_emux_setup_effect(struct snd_emux_voice * vp)222 snd_emux_setup_effect(struct snd_emux_voice *vp)
223 {
224 struct snd_midi_channel *chan = vp->chan;
225 struct snd_emux_effect_table *fx;
226 unsigned char *srcp;
227 int i;
228
229 fx = chan->private;
230 if (!fx)
231 return;
232
233 /* modify the register values via effect table */
234 for (i = 0; i < EMUX_FX_END; i++) {
235 int offset;
236 if (!fx->flag[i])
237 continue;
238 offset = parm_defs[i].offset;
239 if (offset < 0)
240 continue;
241 #ifdef SNDRV_LITTLE_ENDIAN
242 if (parm_defs[i].type & PARM_IS_ALIGN_HI)
243 offset++;
244 #else
245 if (parm_defs[i].type & PARM_IS_ALIGN_LO)
246 offset++;
247 #endif
248 srcp = (unsigned char*)&vp->reg.parm + offset;
249 if (parm_defs[i].type & PARM_IS_BYTE)
250 effect_set_byte(srcp, chan, i);
251 else
252 effect_set_word((unsigned short*)srcp, chan, i);
253 }
254
255 /* correct sample and loop points */
256 vp->reg.start += effect_get_offset(chan, EMUX_FX_SAMPLE_START,
257 EMUX_FX_COARSE_SAMPLE_START,
258 vp->reg.sample_mode);
259
260 vp->reg.loopstart += effect_get_offset(chan, EMUX_FX_LOOP_START,
261 EMUX_FX_COARSE_LOOP_START,
262 vp->reg.sample_mode);
263
264 vp->reg.loopend += effect_get_offset(chan, EMUX_FX_LOOP_END,
265 EMUX_FX_COARSE_LOOP_END,
266 vp->reg.sample_mode);
267 }
268
269 /*
270 * effect table
271 */
272 void
snd_emux_create_effect(struct snd_emux_port * p)273 snd_emux_create_effect(struct snd_emux_port *p)
274 {
275 int i;
276 p->effect = kcalloc(p->chset.max_channels,
277 sizeof(struct snd_emux_effect_table), GFP_KERNEL);
278 if (p->effect) {
279 for (i = 0; i < p->chset.max_channels; i++)
280 p->chset.channels[i].private = p->effect + i;
281 } else {
282 for (i = 0; i < p->chset.max_channels; i++)
283 p->chset.channels[i].private = NULL;
284 }
285 }
286
287 void
snd_emux_delete_effect(struct snd_emux_port * p)288 snd_emux_delete_effect(struct snd_emux_port *p)
289 {
290 kfree(p->effect);
291 p->effect = NULL;
292 }
293
294 void
snd_emux_clear_effect(struct snd_emux_port * p)295 snd_emux_clear_effect(struct snd_emux_port *p)
296 {
297 if (p->effect) {
298 memset(p->effect, 0, sizeof(struct snd_emux_effect_table) *
299 p->chset.max_channels);
300 }
301 }
302
303 #endif /* SNDRV_EMUX_USE_RAW_EFFECT */
304