diff options
Diffstat (limited to 'sound/synth/emux/emux_effect.c')
| -rw-r--r-- | sound/synth/emux/emux_effect.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/sound/synth/emux/emux_effect.c b/sound/synth/emux/emux_effect.c new file mode 100644 index 0000000000..3c7314f5fb --- /dev/null +++ b/sound/synth/emux/emux_effect.c @@ -0,0 +1,303 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + */ + +#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) + return; + offset = parm_defs[type].offset; + if (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; + + fx = chan->private; + if (!fx) + return; + + /* modify the register values via effect table */ + for (i = 0; i < EMUX_FX_END; i++) { + int offset; + if (!fx->flag[i]) + continue; + offset = parm_defs[i].offset; + if (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 */ |