--- /dev/null
+/*
+ * 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;
+}
+
+#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);
+}
+#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 */
Code Review / kvmfornfv.git / blobdiff