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linux/include/sound/emux_synth.h
Oswald Buddenhagen e68235c8aa ALSA: emu10k1: fix synthesizer pitch for E-MU cards at 44.1 kHz 
This is only a very partial fix - the frequency-dependent envelope & LFO
register values aren't adjusted.

But I'm not sure they were even correct at 48 kHz to start with, as most
of them are precalculated by common code which assumes an EMU8K-specific
44.1 kHz word clock, and it seems somewhat unlikely that the hardware's
register interpretation was adjusted to compensate for the different
word clock.

In any case I'm not going to spend time on fixing that, as this code is
unlikely to be actually used by anyone today.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230612191325.1315854-6-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-13 07:42:08 +02:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_EMUX_SYNTH_H
#define __SOUND_EMUX_SYNTH_H
/*
* Defines for the Emu-series WaveTable chip
*
* Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
*/
#include <sound/seq_kernel.h>
#include <sound/seq_device.h>
#include <sound/soundfont.h>
#include <sound/seq_midi_emul.h>
#include <sound/seq_oss.h>
#include <sound/emux_legacy.h>
#include <sound/seq_virmidi.h>
/*
* compile flags
*/
#define SNDRV_EMUX_USE_RAW_EFFECT
struct snd_emux;
struct snd_emux_port;
struct snd_emux_voice;
struct snd_emux_effect_table;
/*
* operators
*/
struct snd_emux_operators {
struct module *owner;
struct snd_emux_voice *(*get_voice)(struct snd_emux *emu,
struct snd_emux_port *port);
int (*prepare)(struct snd_emux_voice *vp);
void (*trigger)(struct snd_emux_voice *vp);
void (*release)(struct snd_emux_voice *vp);
void (*update)(struct snd_emux_voice *vp, int update);
void (*terminate)(struct snd_emux_voice *vp);
void (*free_voice)(struct snd_emux_voice *vp);
void (*reset)(struct snd_emux *emu, int ch);
/* the first parameters are struct snd_emux */
int (*sample_new)(struct snd_emux *emu, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr,
const void __user *data, long count);
int (*sample_free)(struct snd_emux *emu, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr);
void (*sample_reset)(struct snd_emux *emu);
int (*load_fx)(struct snd_emux *emu, int type, int arg,
const void __user *data, long count);
void (*sysex)(struct snd_emux *emu, char *buf, int len, int parsed,
struct snd_midi_channel_set *chset);
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
int (*oss_ioctl)(struct snd_emux *emu, int cmd, int p1, int p2);
#endif
int (*get_pitch_shift)(struct snd_emux *emu);
};
/*
* constant values
*/
#define SNDRV_EMUX_MAX_PORTS 32 /* max # of sequencer ports */
#define SNDRV_EMUX_MAX_VOICES 64 /* max # of voices */
#define SNDRV_EMUX_MAX_MULTI_VOICES 16 /* max # of playable voices
* simultineously
*/
/*
* flags
*/
#define SNDRV_EMUX_ACCEPT_ROM (1<<0)
/*
* emuX wavetable
*/
struct snd_emux {
struct snd_card *card; /* assigned card */
/* following should be initialized before registration */
int max_voices; /* Number of voices */
int mem_size; /* memory size (in byte) */
int num_ports; /* number of ports to be created */
struct snd_emux_operators ops; /* operators */
void *hw; /* hardware */
unsigned long flags; /* other conditions */
int midi_ports; /* number of virtual midi devices */
int midi_devidx; /* device offset of virtual midi */
unsigned int linear_panning: 1; /* panning is linear (sbawe = 1, emu10k1 = 0) */
int hwdep_idx; /* hwdep device index */
struct snd_hwdep *hwdep; /* hwdep device */
/* private */
int num_voices; /* current number of voices */
struct snd_sf_list *sflist; /* root of SoundFont list */
struct snd_emux_voice *voices; /* Voices (EMU 'channel') */
int use_time; /* allocation counter */
spinlock_t voice_lock; /* Lock for voice access */
struct mutex register_mutex;
int client; /* For the sequencer client */
int ports[SNDRV_EMUX_MAX_PORTS]; /* The ports for this device */
struct snd_emux_port *portptrs[SNDRV_EMUX_MAX_PORTS];
int used; /* use counter */
char *name; /* name of the device (internal) */
struct snd_rawmidi **vmidi;
struct timer_list tlist; /* for pending note-offs */
int timer_active;
struct snd_util_memhdr *memhdr; /* memory chunk information */
#ifdef CONFIG_SND_PROC_FS
struct snd_info_entry *proc;
#endif
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
struct snd_seq_device *oss_synth;
#endif
};
/*
* sequencer port information
*/
struct snd_emux_port {
struct snd_midi_channel_set chset;
struct snd_emux *emu;
char port_mode; /* operation mode */
int volume_atten; /* emuX raw attenuation */
unsigned long drum_flags; /* drum bitmaps */
int ctrls[EMUX_MD_END]; /* control parameters */
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
struct snd_emux_effect_table *effect;
#endif
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
struct snd_seq_oss_arg *oss_arg;
#endif
};
/* port_mode */
#define SNDRV_EMUX_PORT_MODE_MIDI 0 /* normal MIDI port */
#define SNDRV_EMUX_PORT_MODE_OSS_SYNTH 1 /* OSS synth port */
#define SNDRV_EMUX_PORT_MODE_OSS_MIDI 2 /* OSS multi channel synth port */
/*
* A structure to keep track of each hardware voice
*/
struct snd_emux_voice {
int ch; /* Hardware channel number */
int state; /* status */
#define SNDRV_EMUX_ST_OFF 0x00 /* Not playing, and inactive */
#define SNDRV_EMUX_ST_ON 0x01 /* Note on */
#define SNDRV_EMUX_ST_RELEASED (0x02|SNDRV_EMUX_ST_ON) /* Note released */
#define SNDRV_EMUX_ST_SUSTAINED (0x04|SNDRV_EMUX_ST_ON) /* Note sustained */
#define SNDRV_EMUX_ST_STANDBY (0x08|SNDRV_EMUX_ST_ON) /* Waiting to be triggered */
#define SNDRV_EMUX_ST_PENDING (0x10|SNDRV_EMUX_ST_ON) /* Note will be released */
#define SNDRV_EMUX_ST_LOCKED 0x100 /* Not accessible */
unsigned int time; /* An allocation time */
unsigned char note; /* Note currently assigned to this voice */
unsigned char key;
unsigned char velocity; /* Velocity of current note */
struct snd_sf_zone *zone; /* Zone assigned to this note */
void *block; /* sample block pointer (optional) */
struct snd_midi_channel *chan; /* Midi channel for this note */
struct snd_emux_port *port; /* associated port */
struct snd_emux *emu; /* assigned root info */
void *hw; /* hardware pointer (emu8000 or emu10k1) */
unsigned long ontime; /* jiffies at note triggered */
/* Emu8k/Emu10k1 registers */
struct soundfont_voice_info reg;
/* additional registers */
int avol; /* volume attenuation */
int acutoff; /* cutoff target */
int apitch; /* pitch offset */
int apan; /* pan/aux pair */
int aaux;
int ptarget; /* pitch target */
int vtarget; /* volume target */
int ftarget; /* filter target */
};
/*
* update flags (can be combined)
*/
#define SNDRV_EMUX_UPDATE_VOLUME (1<<0)
#define SNDRV_EMUX_UPDATE_PITCH (1<<1)
#define SNDRV_EMUX_UPDATE_PAN (1<<2)
#define SNDRV_EMUX_UPDATE_FMMOD (1<<3)
#define SNDRV_EMUX_UPDATE_TREMFREQ (1<<4)
#define SNDRV_EMUX_UPDATE_FM2FRQ2 (1<<5)
#define SNDRV_EMUX_UPDATE_Q (1<<6)
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
/*
* effect table
*/
struct snd_emux_effect_table {
/* Emu8000 specific effects */
short val[EMUX_NUM_EFFECTS];
unsigned char flag[EMUX_NUM_EFFECTS];
};
#endif /* SNDRV_EMUX_USE_RAW_EFFECT */
/*
* prototypes - interface to Emu10k1 and Emu8k routines
*/
int snd_emux_new(struct snd_emux **remu);
int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name);
int snd_emux_free(struct snd_emux *emu);
/*
* exported functions
*/
void snd_emux_terminate_all(struct snd_emux *emu);
void snd_emux_lock_voice(struct snd_emux *emu, int voice);
void snd_emux_unlock_voice(struct snd_emux *emu, int voice);
#endif /* __SOUND_EMUX_SYNTH_H */
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