summaryrefslogtreecommitdiff
path: root/sound/synth/emux/emux_effect.c
blob: 9ac0bf531b4b2ef1df29e6e034f1a8b5e830f290 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/*
 *  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;
}

#if IS_ENABLED(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 */