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Release 4.8 sound/synth/emux/emux_effect.c

Directory: sound/synth/emux
/*
 *  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; }

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/* 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; }

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/* 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; }

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#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); }

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#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); }

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/* 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); }

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/* * 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; } }

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void snd_emux_delete_effect(struct snd_emux_port *p) { kfree(p->effect); p->effect = NULL; }

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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); } }

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#endif /* SNDRV_EMUX_USE_RAW_EFFECT */

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Directory: sound/synth/emux
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