983 lines
25 KiB
C
983 lines
25 KiB
C
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/*
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* Midi synth routines for the Emu8k/Emu10k1
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*
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* Copyright (C) 1999 Steve Ratcliffe
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* Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
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*
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* Contains code based on awe_wave.c by Takashi Iwai
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/export.h>
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#include "emux_voice.h"
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#include <sound/asoundef.h>
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/*
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* Prototypes
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*/
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/*
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* Ensure a value is between two points
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* macro evaluates its args more than once, so changed to upper-case.
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*/
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#define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
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#define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
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static int get_zone(struct snd_emux *emu, struct snd_emux_port *port,
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int *notep, int vel, struct snd_midi_channel *chan,
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struct snd_sf_zone **table);
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static int get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan);
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static void terminate_note1(struct snd_emux *emu, int note,
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struct snd_midi_channel *chan, int free);
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static void exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port,
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int exclass);
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static void terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free);
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static void update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update);
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static void setup_voice(struct snd_emux_voice *vp);
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static int calc_pan(struct snd_emux_voice *vp);
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static int calc_volume(struct snd_emux_voice *vp);
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static int calc_pitch(struct snd_emux_voice *vp);
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/*
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* Start a note.
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*/
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void
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snd_emux_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
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{
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struct snd_emux *emu;
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int i, key, nvoices;
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struct snd_emux_voice *vp;
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struct snd_sf_zone *table[SNDRV_EMUX_MAX_MULTI_VOICES];
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unsigned long flags;
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struct snd_emux_port *port;
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port = p;
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if (snd_BUG_ON(!port || !chan))
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return;
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emu = port->emu;
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if (snd_BUG_ON(!emu || !emu->ops.get_voice || !emu->ops.trigger))
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return;
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key = note; /* remember the original note */
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nvoices = get_zone(emu, port, ¬e, vel, chan, table);
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if (! nvoices)
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return;
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/* exclusive note off */
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for (i = 0; i < nvoices; i++) {
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struct snd_sf_zone *zp = table[i];
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if (zp && zp->v.exclusiveClass)
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exclusive_note_off(emu, port, zp->v.exclusiveClass);
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}
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#if 0 // seems not necessary
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/* Turn off the same note on the same channel. */
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terminate_note1(emu, key, chan, 0);
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#endif
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spin_lock_irqsave(&emu->voice_lock, flags);
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for (i = 0; i < nvoices; i++) {
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/* set up each voice parameter */
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/* at this stage, we don't trigger the voice yet. */
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if (table[i] == NULL)
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continue;
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vp = emu->ops.get_voice(emu, port);
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if (vp == NULL || vp->ch < 0)
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continue;
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if (STATE_IS_PLAYING(vp->state))
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emu->ops.terminate(vp);
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vp->time = emu->use_time++;
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vp->chan = chan;
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vp->port = port;
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vp->key = key;
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vp->note = note;
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vp->velocity = vel;
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vp->zone = table[i];
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if (vp->zone->sample)
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vp->block = vp->zone->sample->block;
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else
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vp->block = NULL;
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setup_voice(vp);
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vp->state = SNDRV_EMUX_ST_STANDBY;
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if (emu->ops.prepare) {
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vp->state = SNDRV_EMUX_ST_OFF;
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if (emu->ops.prepare(vp) >= 0)
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vp->state = SNDRV_EMUX_ST_STANDBY;
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}
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}
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/* start envelope now */
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for (i = 0; i < emu->max_voices; i++) {
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vp = &emu->voices[i];
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if (vp->state == SNDRV_EMUX_ST_STANDBY &&
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vp->chan == chan) {
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emu->ops.trigger(vp);
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vp->state = SNDRV_EMUX_ST_ON;
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vp->ontime = jiffies; /* remember the trigger timing */
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}
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}
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spin_unlock_irqrestore(&emu->voice_lock, flags);
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#ifdef SNDRV_EMUX_USE_RAW_EFFECT
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if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
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/* clear voice position for the next note on this channel */
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struct snd_emux_effect_table *fx = chan->private;
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if (fx) {
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fx->flag[EMUX_FX_SAMPLE_START] = 0;
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fx->flag[EMUX_FX_COARSE_SAMPLE_START] = 0;
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}
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}
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#endif
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}
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/*
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* Release a note in response to a midi note off.
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*/
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void
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snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
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{
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int ch;
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struct snd_emux *emu;
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struct snd_emux_voice *vp;
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unsigned long flags;
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struct snd_emux_port *port;
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port = p;
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if (snd_BUG_ON(!port || !chan))
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return;
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emu = port->emu;
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if (snd_BUG_ON(!emu || !emu->ops.release))
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return;
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spin_lock_irqsave(&emu->voice_lock, flags);
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for (ch = 0; ch < emu->max_voices; ch++) {
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vp = &emu->voices[ch];
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if (STATE_IS_PLAYING(vp->state) &&
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vp->chan == chan && vp->key == note) {
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vp->state = SNDRV_EMUX_ST_RELEASED;
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if (vp->ontime == jiffies) {
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/* if note-off is sent too shortly after
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* note-on, emuX engine cannot produce the sound
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* correctly. so we'll release this note
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* a bit later via timer callback.
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*/
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vp->state = SNDRV_EMUX_ST_PENDING;
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if (! emu->timer_active) {
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mod_timer(&emu->tlist, jiffies + 1);
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emu->timer_active = 1;
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}
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} else
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/* ok now release the note */
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emu->ops.release(vp);
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}
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}
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spin_unlock_irqrestore(&emu->voice_lock, flags);
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}
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/*
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* timer callback
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*
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* release the pending note-offs
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*/
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void snd_emux_timer_callback(unsigned long data)
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{
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struct snd_emux *emu = (struct snd_emux *) data;
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struct snd_emux_voice *vp;
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unsigned long flags;
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int ch, do_again = 0;
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spin_lock_irqsave(&emu->voice_lock, flags);
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for (ch = 0; ch < emu->max_voices; ch++) {
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vp = &emu->voices[ch];
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if (vp->state == SNDRV_EMUX_ST_PENDING) {
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if (vp->ontime == jiffies)
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do_again++; /* release this at the next interrupt */
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else {
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emu->ops.release(vp);
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vp->state = SNDRV_EMUX_ST_RELEASED;
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}
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}
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}
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if (do_again) {
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mod_timer(&emu->tlist, jiffies + 1);
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emu->timer_active = 1;
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} else
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emu->timer_active = 0;
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spin_unlock_irqrestore(&emu->voice_lock, flags);
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}
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/*
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* key pressure change
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||
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*/
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void
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snd_emux_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
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||
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{
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||
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int ch;
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||
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struct snd_emux *emu;
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||
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struct snd_emux_voice *vp;
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||
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unsigned long flags;
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||
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struct snd_emux_port *port;
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port = p;
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if (snd_BUG_ON(!port || !chan))
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||
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return;
|
||
|
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|
||
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emu = port->emu;
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||
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if (snd_BUG_ON(!emu || !emu->ops.update))
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||
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return;
|
||
|
|
|
||
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spin_lock_irqsave(&emu->voice_lock, flags);
|
||
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for (ch = 0; ch < emu->max_voices; ch++) {
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||
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vp = &emu->voices[ch];
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||
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if (vp->state == SNDRV_EMUX_ST_ON &&
|
||
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vp->chan == chan && vp->key == note) {
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||
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vp->velocity = vel;
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||
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update_voice(emu, vp, SNDRV_EMUX_UPDATE_VOLUME);
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||
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|
}
|
||
|
|
}
|
||
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spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
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}
|
||
|
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|
||
|
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|
||
|
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/*
|
||
|
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* Modulate the voices which belong to the channel
|
||
|
|
*/
|
||
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void
|
||
|
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snd_emux_update_channel(struct snd_emux_port *port, struct snd_midi_channel *chan, int update)
|
||
|
|
{
|
||
|
|
struct snd_emux *emu;
|
||
|
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struct snd_emux_voice *vp;
|
||
|
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int i;
|
||
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unsigned long flags;
|
||
|
|
|
||
|
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if (! update)
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|
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return;
|
||
|
|
|
||
|
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emu = port->emu;
|
||
|
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if (snd_BUG_ON(!emu || !emu->ops.update))
|
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return;
|
||
|
|
|
||
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spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
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for (i = 0; i < emu->max_voices; i++) {
|
||
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vp = &emu->voices[i];
|
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|
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if (vp->chan == chan)
|
||
|
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update_voice(emu, vp, update);
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Modulate all the voices which belong to the port.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_update_port(struct snd_emux_port *port, int update)
|
||
|
|
{
|
||
|
|
struct snd_emux *emu;
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
int i;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
if (! update)
|
||
|
|
return;
|
||
|
|
|
||
|
|
emu = port->emu;
|
||
|
|
if (snd_BUG_ON(!emu || !emu->ops.update))
|
||
|
|
return;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
if (vp->port == port)
|
||
|
|
update_voice(emu, vp, update);
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Deal with a controller type event. This includes all types of
|
||
|
|
* control events, not just the midi controllers
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_control(void *p, int type, struct snd_midi_channel *chan)
|
||
|
|
{
|
||
|
|
struct snd_emux_port *port;
|
||
|
|
|
||
|
|
port = p;
|
||
|
|
if (snd_BUG_ON(!port || !chan))
|
||
|
|
return;
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case MIDI_CTL_MSB_MAIN_VOLUME:
|
||
|
|
case MIDI_CTL_MSB_EXPRESSION:
|
||
|
|
snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_VOLUME);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIDI_CTL_MSB_PAN:
|
||
|
|
snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIDI_CTL_SOFT_PEDAL:
|
||
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
||
|
|
/* FIXME: this is an emulation */
|
||
|
|
if (chan->control[type] >= 64)
|
||
|
|
snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
|
||
|
|
EMUX_FX_FLAG_ADD);
|
||
|
|
else
|
||
|
|
snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0,
|
||
|
|
EMUX_FX_FLAG_OFF);
|
||
|
|
#endif
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIDI_CTL_PITCHBEND:
|
||
|
|
snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PITCH);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIDI_CTL_MSB_MODWHEEL:
|
||
|
|
case MIDI_CTL_CHAN_PRESSURE:
|
||
|
|
snd_emux_update_channel(port, chan,
|
||
|
|
SNDRV_EMUX_UPDATE_FMMOD |
|
||
|
|
SNDRV_EMUX_UPDATE_FM2FRQ2);
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if (port->chset.midi_mode == SNDRV_MIDI_MODE_XG) {
|
||
|
|
snd_emux_xg_control(port, chan, type);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* terminate note - if free flag is true, free the terminated voice
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
terminate_note1(struct snd_emux *emu, int note, struct snd_midi_channel *chan, int free)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
if (STATE_IS_PLAYING(vp->state) && vp->chan == chan &&
|
||
|
|
vp->key == note)
|
||
|
|
terminate_voice(emu, vp, free);
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* terminate note - exported for midi emulation
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_terminate_note(void *p, int note, struct snd_midi_channel *chan)
|
||
|
|
{
|
||
|
|
struct snd_emux *emu;
|
||
|
|
struct snd_emux_port *port;
|
||
|
|
|
||
|
|
port = p;
|
||
|
|
if (snd_BUG_ON(!port || !chan))
|
||
|
|
return;
|
||
|
|
|
||
|
|
emu = port->emu;
|
||
|
|
if (snd_BUG_ON(!emu || !emu->ops.terminate))
|
||
|
|
return;
|
||
|
|
|
||
|
|
terminate_note1(emu, note, chan, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Terminate all the notes
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_terminate_all(struct snd_emux *emu)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
if (STATE_IS_PLAYING(vp->state))
|
||
|
|
terminate_voice(emu, vp, 0);
|
||
|
|
if (vp->state == SNDRV_EMUX_ST_OFF) {
|
||
|
|
if (emu->ops.free_voice)
|
||
|
|
emu->ops.free_voice(vp);
|
||
|
|
if (emu->ops.reset)
|
||
|
|
emu->ops.reset(emu, i);
|
||
|
|
}
|
||
|
|
vp->time = 0;
|
||
|
|
}
|
||
|
|
/* initialize allocation time */
|
||
|
|
emu->use_time = 0;
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
EXPORT_SYMBOL(snd_emux_terminate_all);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Terminate all voices associated with the given port
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_sounds_off_all(struct snd_emux_port *port)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
struct snd_emux *emu;
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
if (snd_BUG_ON(!port))
|
||
|
|
return;
|
||
|
|
emu = port->emu;
|
||
|
|
if (snd_BUG_ON(!emu || !emu->ops.terminate))
|
||
|
|
return;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
if (STATE_IS_PLAYING(vp->state) &&
|
||
|
|
vp->port == port)
|
||
|
|
terminate_voice(emu, vp, 0);
|
||
|
|
if (vp->state == SNDRV_EMUX_ST_OFF) {
|
||
|
|
if (emu->ops.free_voice)
|
||
|
|
emu->ops.free_voice(vp);
|
||
|
|
if (emu->ops.reset)
|
||
|
|
emu->ops.reset(emu, i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Terminate all voices that have the same exclusive class. This
|
||
|
|
* is mainly for drums.
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, int exclass)
|
||
|
|
{
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
int i;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
if (STATE_IS_PLAYING(vp->state) && vp->port == port &&
|
||
|
|
vp->reg.exclusiveClass == exclass) {
|
||
|
|
terminate_voice(emu, vp, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* terminate a voice
|
||
|
|
* if free flag is true, call free_voice after termination
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free)
|
||
|
|
{
|
||
|
|
emu->ops.terminate(vp);
|
||
|
|
vp->time = emu->use_time++;
|
||
|
|
vp->chan = NULL;
|
||
|
|
vp->port = NULL;
|
||
|
|
vp->zone = NULL;
|
||
|
|
vp->block = NULL;
|
||
|
|
vp->state = SNDRV_EMUX_ST_OFF;
|
||
|
|
if (free && emu->ops.free_voice)
|
||
|
|
emu->ops.free_voice(vp);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Modulate the voice
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update)
|
||
|
|
{
|
||
|
|
if (!STATE_IS_PLAYING(vp->state))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (vp->chan == NULL || vp->port == NULL)
|
||
|
|
return;
|
||
|
|
if (update & SNDRV_EMUX_UPDATE_VOLUME)
|
||
|
|
calc_volume(vp);
|
||
|
|
if (update & SNDRV_EMUX_UPDATE_PITCH)
|
||
|
|
calc_pitch(vp);
|
||
|
|
if (update & SNDRV_EMUX_UPDATE_PAN) {
|
||
|
|
if (! calc_pan(vp) && (update == SNDRV_EMUX_UPDATE_PAN))
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
emu->ops.update(vp, update);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if 0 // not used
|
||
|
|
/* table for volume target calculation */
|
||
|
|
static unsigned short voltarget[16] = {
|
||
|
|
0xEAC0, 0xE0C8, 0xD740, 0xCE20, 0xC560, 0xBD08, 0xB500, 0xAD58,
|
||
|
|
0xA5F8, 0x9EF0, 0x9830, 0x91C0, 0x8B90, 0x85A8, 0x8000, 0x7A90
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define LO_BYTE(v) ((v) & 0xff)
|
||
|
|
#define HI_BYTE(v) (((v) >> 8) & 0xff)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sets up the voice structure by calculating some values that
|
||
|
|
* will be needed later.
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
setup_voice(struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
struct soundfont_voice_parm *parm;
|
||
|
|
int pitch;
|
||
|
|
|
||
|
|
/* copy the original register values */
|
||
|
|
vp->reg = vp->zone->v;
|
||
|
|
|
||
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
||
|
|
snd_emux_setup_effect(vp);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* reset status */
|
||
|
|
vp->apan = -1;
|
||
|
|
vp->avol = -1;
|
||
|
|
vp->apitch = -1;
|
||
|
|
|
||
|
|
calc_volume(vp);
|
||
|
|
calc_pitch(vp);
|
||
|
|
calc_pan(vp);
|
||
|
|
|
||
|
|
parm = &vp->reg.parm;
|
||
|
|
|
||
|
|
/* compute filter target and correct modulation parameters */
|
||
|
|
if (LO_BYTE(parm->modatkhld) >= 0x80 && parm->moddelay >= 0x8000) {
|
||
|
|
parm->moddelay = 0xbfff;
|
||
|
|
pitch = (HI_BYTE(parm->pefe) << 4) + vp->apitch;
|
||
|
|
if (pitch > 0xffff)
|
||
|
|
pitch = 0xffff;
|
||
|
|
/* calculate filter target */
|
||
|
|
vp->ftarget = parm->cutoff + LO_BYTE(parm->pefe);
|
||
|
|
LIMITVALUE(vp->ftarget, 0, 255);
|
||
|
|
vp->ftarget <<= 8;
|
||
|
|
} else {
|
||
|
|
vp->ftarget = parm->cutoff;
|
||
|
|
vp->ftarget <<= 8;
|
||
|
|
pitch = vp->apitch;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* compute pitch target */
|
||
|
|
if (pitch != 0xffff) {
|
||
|
|
vp->ptarget = 1 << (pitch >> 12);
|
||
|
|
if (pitch & 0x800) vp->ptarget += (vp->ptarget*0x102e)/0x2710;
|
||
|
|
if (pitch & 0x400) vp->ptarget += (vp->ptarget*0x764)/0x2710;
|
||
|
|
if (pitch & 0x200) vp->ptarget += (vp->ptarget*0x389)/0x2710;
|
||
|
|
vp->ptarget += (vp->ptarget >> 1);
|
||
|
|
if (vp->ptarget > 0xffff) vp->ptarget = 0xffff;
|
||
|
|
} else
|
||
|
|
vp->ptarget = 0xffff;
|
||
|
|
|
||
|
|
if (LO_BYTE(parm->modatkhld) >= 0x80) {
|
||
|
|
parm->modatkhld &= ~0xff;
|
||
|
|
parm->modatkhld |= 0x7f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* compute volume target and correct volume parameters */
|
||
|
|
vp->vtarget = 0;
|
||
|
|
#if 0 /* FIXME: this leads to some clicks.. */
|
||
|
|
if (LO_BYTE(parm->volatkhld) >= 0x80 && parm->voldelay >= 0x8000) {
|
||
|
|
parm->voldelay = 0xbfff;
|
||
|
|
vp->vtarget = voltarget[vp->avol % 0x10] >> (vp->avol >> 4);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (LO_BYTE(parm->volatkhld) >= 0x80) {
|
||
|
|
parm->volatkhld &= ~0xff;
|
||
|
|
parm->volatkhld |= 0x7f;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* calculate pitch parameter
|
||
|
|
*/
|
||
|
|
static unsigned char pan_volumes[256] = {
|
||
|
|
0x00,0x03,0x06,0x09,0x0c,0x0f,0x12,0x14,0x17,0x1a,0x1d,0x20,0x22,0x25,0x28,0x2a,
|
||
|
|
0x2d,0x30,0x32,0x35,0x37,0x3a,0x3c,0x3f,0x41,0x44,0x46,0x49,0x4b,0x4d,0x50,0x52,
|
||
|
|
0x54,0x57,0x59,0x5b,0x5d,0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6f,0x71,0x73,0x75,
|
||
|
|
0x77,0x79,0x7b,0x7c,0x7e,0x80,0x82,0x84,0x86,0x88,0x89,0x8b,0x8d,0x8f,0x90,0x92,
|
||
|
|
0x94,0x96,0x97,0x99,0x9a,0x9c,0x9e,0x9f,0xa1,0xa2,0xa4,0xa5,0xa7,0xa8,0xaa,0xab,
|
||
|
|
0xad,0xae,0xaf,0xb1,0xb2,0xb3,0xb5,0xb6,0xb7,0xb9,0xba,0xbb,0xbc,0xbe,0xbf,0xc0,
|
||
|
|
0xc1,0xc2,0xc3,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,
|
||
|
|
0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdc,0xdd,0xde,0xdf,
|
||
|
|
0xdf,0xe0,0xe1,0xe2,0xe2,0xe3,0xe4,0xe4,0xe5,0xe6,0xe6,0xe7,0xe8,0xe8,0xe9,0xe9,
|
||
|
|
0xea,0xeb,0xeb,0xec,0xec,0xed,0xed,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf1,0xf1,0xf1,
|
||
|
|
0xf2,0xf2,0xf3,0xf3,0xf3,0xf4,0xf4,0xf5,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,0xf7,
|
||
|
|
0xf7,0xf8,0xf8,0xf8,0xf9,0xf9,0xf9,0xf9,0xf9,0xfa,0xfa,0xfa,0xfa,0xfb,0xfb,0xfb,
|
||
|
|
0xfb,0xfb,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,
|
||
|
|
0xfd,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,
|
||
|
|
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||
|
|
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int
|
||
|
|
calc_pan(struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
struct snd_midi_channel *chan = vp->chan;
|
||
|
|
int pan;
|
||
|
|
|
||
|
|
/* pan & loop start (pan 8bit, MSB, 0:right, 0xff:left) */
|
||
|
|
if (vp->reg.fixpan > 0) /* 0-127 */
|
||
|
|
pan = 255 - (int)vp->reg.fixpan * 2;
|
||
|
|
else {
|
||
|
|
pan = chan->control[MIDI_CTL_MSB_PAN] - 64;
|
||
|
|
if (vp->reg.pan >= 0) /* 0-127 */
|
||
|
|
pan += vp->reg.pan - 64;
|
||
|
|
pan = 127 - (int)pan * 2;
|
||
|
|
}
|
||
|
|
LIMITVALUE(pan, 0, 255);
|
||
|
|
|
||
|
|
if (vp->emu->linear_panning) {
|
||
|
|
/* assuming linear volume */
|
||
|
|
if (pan != vp->apan) {
|
||
|
|
vp->apan = pan;
|
||
|
|
if (pan == 0)
|
||
|
|
vp->aaux = 0xff;
|
||
|
|
else
|
||
|
|
vp->aaux = (-pan) & 0xff;
|
||
|
|
return 1;
|
||
|
|
} else
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
/* using volume table */
|
||
|
|
if (vp->apan != (int)pan_volumes[pan]) {
|
||
|
|
vp->apan = pan_volumes[pan];
|
||
|
|
vp->aaux = pan_volumes[255 - pan];
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* calculate volume attenuation
|
||
|
|
*
|
||
|
|
* Voice volume is controlled by volume attenuation parameter.
|
||
|
|
* So volume becomes maximum when avol is 0 (no attenuation), and
|
||
|
|
* minimum when 255 (-96dB or silence).
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* tables for volume->attenuation calculation */
|
||
|
|
static unsigned char voltab1[128] = {
|
||
|
|
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
|
||
|
|
0x63, 0x2b, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22,
|
||
|
|
0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a,
|
||
|
|
0x19, 0x19, 0x18, 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x14,
|
||
|
|
0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10,
|
||
|
|
0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0e, 0x0d,
|
||
|
|
0x0d, 0x0d, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b,
|
||
|
|
0x0b, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09,
|
||
|
|
0x08, 0x08, 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06,
|
||
|
|
0x06, 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x04,
|
||
|
|
0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02,
|
||
|
|
0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||
|
|
0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||
|
|
};
|
||
|
|
|
||
|
|
static unsigned char voltab2[128] = {
|
||
|
|
0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x2a,
|
||
|
|
0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x24, 0x23, 0x22, 0x21,
|
||
|
|
0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1c, 0x1b, 0x1a,
|
||
|
|
0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 0x16, 0x16, 0x15, 0x15,
|
||
|
|
0x14, 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x10,
|
||
|
|
0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d,
|
||
|
|
0x0d, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b, 0x0b, 0x0a, 0x0a,
|
||
|
|
0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09, 0x08, 0x08, 0x08,
|
||
|
|
0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
|
||
|
|
0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
|
||
|
|
0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03,
|
||
|
|
0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01,
|
||
|
|
0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
|
||
|
|
};
|
||
|
|
|
||
|
|
static unsigned char expressiontab[128] = {
|
||
|
|
0x7f, 0x6c, 0x62, 0x5a, 0x54, 0x50, 0x4b, 0x48, 0x45, 0x42,
|
||
|
|
0x40, 0x3d, 0x3b, 0x39, 0x38, 0x36, 0x34, 0x33, 0x31, 0x30,
|
||
|
|
0x2f, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26, 0x25,
|
||
|
|
0x24, 0x24, 0x23, 0x22, 0x21, 0x21, 0x20, 0x1f, 0x1e, 0x1e,
|
||
|
|
0x1d, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a, 0x1a, 0x19, 0x18, 0x18,
|
||
|
|
0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x15, 0x14, 0x14, 0x13,
|
||
|
|
0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10, 0x10, 0x0f, 0x0f,
|
||
|
|
0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d, 0x0d, 0x0c, 0x0c, 0x0c,
|
||
|
|
0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09,
|
||
|
|
0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
|
||
|
|
0x06, 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03,
|
||
|
|
0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,
|
||
|
|
0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Magic to calculate the volume (actually attenuation) from all the
|
||
|
|
* voice and channels parameters.
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
calc_volume(struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
int vol;
|
||
|
|
int main_vol, expression_vol, master_vol;
|
||
|
|
struct snd_midi_channel *chan = vp->chan;
|
||
|
|
struct snd_emux_port *port = vp->port;
|
||
|
|
|
||
|
|
expression_vol = chan->control[MIDI_CTL_MSB_EXPRESSION];
|
||
|
|
LIMITMAX(vp->velocity, 127);
|
||
|
|
LIMITVALUE(expression_vol, 0, 127);
|
||
|
|
if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
|
||
|
|
/* 0 - 127 */
|
||
|
|
main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME];
|
||
|
|
vol = (vp->velocity * main_vol * expression_vol) / (127*127);
|
||
|
|
vol = vol * vp->reg.amplitude / 127;
|
||
|
|
|
||
|
|
LIMITVALUE(vol, 0, 127);
|
||
|
|
|
||
|
|
/* calc to attenuation */
|
||
|
|
vol = snd_sf_vol_table[vol];
|
||
|
|
|
||
|
|
} else {
|
||
|
|
main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME] * vp->reg.amplitude / 127;
|
||
|
|
LIMITVALUE(main_vol, 0, 127);
|
||
|
|
|
||
|
|
vol = voltab1[main_vol] + voltab2[vp->velocity];
|
||
|
|
vol = (vol * 8) / 3;
|
||
|
|
vol += vp->reg.attenuation;
|
||
|
|
vol += ((0x100 - vol) * expressiontab[expression_vol])/128;
|
||
|
|
}
|
||
|
|
|
||
|
|
master_vol = port->chset.gs_master_volume;
|
||
|
|
LIMITVALUE(master_vol, 0, 127);
|
||
|
|
vol += snd_sf_vol_table[master_vol];
|
||
|
|
vol += port->volume_atten;
|
||
|
|
|
||
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
||
|
|
if (chan->private) {
|
||
|
|
struct snd_emux_effect_table *fx = chan->private;
|
||
|
|
vol += fx->val[EMUX_FX_ATTEN];
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
LIMITVALUE(vol, 0, 255);
|
||
|
|
if (vp->avol == vol)
|
||
|
|
return 0; /* value unchanged */
|
||
|
|
|
||
|
|
vp->avol = vol;
|
||
|
|
if (!SF_IS_DRUM_BANK(get_bank(port, chan))
|
||
|
|
&& LO_BYTE(vp->reg.parm.volatkhld) < 0x7d) {
|
||
|
|
int atten;
|
||
|
|
if (vp->velocity < 70)
|
||
|
|
atten = 70;
|
||
|
|
else
|
||
|
|
atten = vp->velocity;
|
||
|
|
vp->acutoff = (atten * vp->reg.parm.cutoff + 0xa0) >> 7;
|
||
|
|
} else {
|
||
|
|
vp->acutoff = vp->reg.parm.cutoff;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 1; /* value changed */
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* calculate pitch offset
|
||
|
|
*
|
||
|
|
* 0xE000 is no pitch offset at 44100Hz sample.
|
||
|
|
* Every 4096 is one octave.
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int
|
||
|
|
calc_pitch(struct snd_emux_voice *vp)
|
||
|
|
{
|
||
|
|
struct snd_midi_channel *chan = vp->chan;
|
||
|
|
int offset;
|
||
|
|
|
||
|
|
/* calculate offset */
|
||
|
|
if (vp->reg.fixkey >= 0) {
|
||
|
|
offset = (vp->reg.fixkey - vp->reg.root) * 4096 / 12;
|
||
|
|
} else {
|
||
|
|
offset = (vp->note - vp->reg.root) * 4096 / 12;
|
||
|
|
}
|
||
|
|
offset = (offset * vp->reg.scaleTuning) / 100;
|
||
|
|
offset += vp->reg.tune * 4096 / 1200;
|
||
|
|
if (chan->midi_pitchbend != 0) {
|
||
|
|
/* (128 * 8192: 1 semitone) ==> (4096: 12 semitones) */
|
||
|
|
offset += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 3072;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* tuning via RPN:
|
||
|
|
* coarse = -8192 to 8192 (100 cent per 128)
|
||
|
|
* fine = -8192 to 8192 (max=100cent)
|
||
|
|
*/
|
||
|
|
/* 4096 = 1200 cents in emu8000 parameter */
|
||
|
|
offset += chan->gm_rpn_coarse_tuning * 4096 / (12 * 128);
|
||
|
|
offset += chan->gm_rpn_fine_tuning / 24;
|
||
|
|
|
||
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
||
|
|
/* add initial pitch correction */
|
||
|
|
if (chan->private) {
|
||
|
|
struct snd_emux_effect_table *fx = chan->private;
|
||
|
|
if (fx->flag[EMUX_FX_INIT_PITCH])
|
||
|
|
offset += fx->val[EMUX_FX_INIT_PITCH];
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* 0xe000: root pitch */
|
||
|
|
offset += 0xe000 + vp->reg.rate_offset;
|
||
|
|
offset += vp->emu->pitch_shift;
|
||
|
|
LIMITVALUE(offset, 0, 0xffff);
|
||
|
|
if (offset == vp->apitch)
|
||
|
|
return 0; /* unchanged */
|
||
|
|
vp->apitch = offset;
|
||
|
|
return 1; /* value changed */
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get the bank number assigned to the channel
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan)
|
||
|
|
{
|
||
|
|
int val;
|
||
|
|
|
||
|
|
switch (port->chset.midi_mode) {
|
||
|
|
case SNDRV_MIDI_MODE_XG:
|
||
|
|
val = chan->control[MIDI_CTL_MSB_BANK];
|
||
|
|
if (val == 127)
|
||
|
|
return 128; /* return drum bank */
|
||
|
|
return chan->control[MIDI_CTL_LSB_BANK];
|
||
|
|
|
||
|
|
case SNDRV_MIDI_MODE_GS:
|
||
|
|
if (chan->drum_channel)
|
||
|
|
return 128;
|
||
|
|
/* ignore LSB (bank map) */
|
||
|
|
return chan->control[MIDI_CTL_MSB_BANK];
|
||
|
|
|
||
|
|
default:
|
||
|
|
if (chan->drum_channel)
|
||
|
|
return 128;
|
||
|
|
return chan->control[MIDI_CTL_MSB_BANK];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Look for the zones matching with the given note and velocity.
|
||
|
|
* The resultant zones are stored on table.
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
get_zone(struct snd_emux *emu, struct snd_emux_port *port,
|
||
|
|
int *notep, int vel, struct snd_midi_channel *chan,
|
||
|
|
struct snd_sf_zone **table)
|
||
|
|
{
|
||
|
|
int preset, bank, def_preset, def_bank;
|
||
|
|
|
||
|
|
bank = get_bank(port, chan);
|
||
|
|
preset = chan->midi_program;
|
||
|
|
|
||
|
|
if (SF_IS_DRUM_BANK(bank)) {
|
||
|
|
def_preset = port->ctrls[EMUX_MD_DEF_DRUM];
|
||
|
|
def_bank = bank;
|
||
|
|
} else {
|
||
|
|
def_preset = preset;
|
||
|
|
def_bank = port->ctrls[EMUX_MD_DEF_BANK];
|
||
|
|
}
|
||
|
|
|
||
|
|
return snd_soundfont_search_zone(emu->sflist, notep, vel, preset, bank,
|
||
|
|
def_preset, def_bank,
|
||
|
|
table, SNDRV_EMUX_MAX_MULTI_VOICES);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
snd_emux_init_voices(struct snd_emux *emu)
|
||
|
|
{
|
||
|
|
struct snd_emux_voice *vp;
|
||
|
|
int i;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
for (i = 0; i < emu->max_voices; i++) {
|
||
|
|
vp = &emu->voices[i];
|
||
|
|
vp->ch = -1; /* not used */
|
||
|
|
vp->state = SNDRV_EMUX_ST_OFF;
|
||
|
|
vp->chan = NULL;
|
||
|
|
vp->port = NULL;
|
||
|
|
vp->time = 0;
|
||
|
|
vp->emu = emu;
|
||
|
|
vp->hw = emu->hw;
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
*/
|
||
|
|
void snd_emux_lock_voice(struct snd_emux *emu, int voice)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
if (emu->voices[voice].state == SNDRV_EMUX_ST_OFF)
|
||
|
|
emu->voices[voice].state = SNDRV_EMUX_ST_LOCKED;
|
||
|
|
else
|
||
|
|
snd_printk(KERN_WARNING
|
||
|
|
"invalid voice for lock %d (state = %x)\n",
|
||
|
|
voice, emu->voices[voice].state);
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
EXPORT_SYMBOL(snd_emux_lock_voice);
|
||
|
|
|
||
|
|
/*
|
||
|
|
*/
|
||
|
|
void snd_emux_unlock_voice(struct snd_emux *emu, int voice)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&emu->voice_lock, flags);
|
||
|
|
if (emu->voices[voice].state == SNDRV_EMUX_ST_LOCKED)
|
||
|
|
emu->voices[voice].state = SNDRV_EMUX_ST_OFF;
|
||
|
|
else
|
||
|
|
snd_printk(KERN_WARNING
|
||
|
|
"invalid voice for unlock %d (state = %x)\n",
|
||
|
|
voice, emu->voices[voice].state);
|
||
|
|
spin_unlock_irqrestore(&emu->voice_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
EXPORT_SYMBOL(snd_emux_unlock_voice);
|