asound_fm.h

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#ifndef __SOUND_ASOUND_FM_H
#define __SOUND_ASOUND_FM_H

/*
 *  Advanced Linux Sound Architecture - ALSA
 *
 *  Interface file between ALSA driver & user space
 *  Copyright (c) 1994-98 by Jaroslav Kysela <[email protected]>,
 *                           4Front Technologies
 *
 *  Direct FM control
 *
 *   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
 *
 */

#define SNDRV_DM_FM_MODE_OPL2   0x00
#define SNDRV_DM_FM_MODE_OPL3   0x01

struct snd_dm_fm_info {
    unsigned char fm_mode;      /* OPL mode, see SNDRV_DM_FM_MODE_XXX */
    unsigned char rhythm;       /* percussion mode flag */
};

/*
 *  Data structure composing an FM "note" or sound event.
 */

struct snd_dm_fm_voice {
    unsigned char op;       /* operator cell (0 or 1) */
    unsigned char voice;        /* FM voice (0 to 17) */

    unsigned char am;       /* amplitude modulation */
    unsigned char vibrato;      /* vibrato effect */
    unsigned char do_sustain;   /* sustain phase */
    unsigned char kbd_scale;    /* keyboard scaling */
    unsigned char harmonic;     /* 4 bits: harmonic and multiplier */
    unsigned char scale_level;  /* 2 bits: decrease output freq rises */
    unsigned char volume;       /* 6 bits: volume */

    unsigned char attack;       /* 4 bits: attack rate */
    unsigned char decay;        /* 4 bits: decay rate */
    unsigned char sustain;      /* 4 bits: sustain level */
    unsigned char release;      /* 4 bits: release rate */

    unsigned char feedback;     /* 3 bits: feedback for op0 */
    unsigned char connection;   /* 0 for serial, 1 for parallel */
    unsigned char left;     /* stereo left */
    unsigned char right;        /* stereo right */
    unsigned char waveform;     /* 3 bits: waveform shape */
};

/*
 *  This describes an FM note by its voice, octave, frequency number (10bit)
 *  and key on/off.
 */

struct snd_dm_fm_note {
    unsigned char voice;    /* 0-17 voice channel */
    unsigned char octave;   /* 3 bits: what octave to play */
    unsigned int fnum;  /* 10 bits: frequency number */
    unsigned char key_on;   /* set for active, clear for silent */
};

/*
 *  FM parameters that apply globally to all voices, and thus are not "notes"
 */

struct snd_dm_fm_params {
    unsigned char am_depth;     /* amplitude modulation depth (1=hi) */
    unsigned char vib_depth;    /* vibrato depth (1=hi) */
    unsigned char kbd_split;    /* keyboard split */
    unsigned char rhythm;       /* percussion mode select */

    /* This block is the percussion instrument data */
    unsigned char bass;
    unsigned char snare;
    unsigned char tomtom;
    unsigned char cymbal;
    unsigned char hihat;
};

/*
 *  FM mode ioctl settings
 */

#define SNDRV_DM_FM_IOCTL_INFO      _IOR('H', 0x20, struct snd_dm_fm_info)
#define SNDRV_DM_FM_IOCTL_RESET     _IO ('H', 0x21)
#define SNDRV_DM_FM_IOCTL_PLAY_NOTE _IOW('H', 0x22, struct snd_dm_fm_note)
#define SNDRV_DM_FM_IOCTL_SET_VOICE _IOW('H', 0x23, struct snd_dm_fm_voice)
#define SNDRV_DM_FM_IOCTL_SET_PARAMS    _IOW('H', 0x24, struct snd_dm_fm_params)
#define SNDRV_DM_FM_IOCTL_SET_MODE  _IOW('H', 0x25, int)
/* for OPL3 only */
#define SNDRV_DM_FM_IOCTL_SET_CONNECTION    _IOW('H', 0x26, int)
/* SBI patch management */
#define SNDRV_DM_FM_IOCTL_CLEAR_PATCHES _IO ('H', 0x40)

#define SNDRV_DM_FM_OSS_IOCTL_RESET     0x20
#define SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE     0x21
#define SNDRV_DM_FM_OSS_IOCTL_SET_VOICE     0x22
#define SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS    0x23
#define SNDRV_DM_FM_OSS_IOCTL_SET_MODE      0x24
#define SNDRV_DM_FM_OSS_IOCTL_SET_OPL       0x25

/*
 * Patch Record - fixed size for write
 */

#define FM_KEY_SBI  "SBI\032"
#define FM_KEY_2OP  "2OP\032"
#define FM_KEY_4OP  "4OP\032"

struct sbi_patch {
    unsigned char prog;
    unsigned char bank;
    char key[4];
    char name[25];
    char extension[7];
    unsigned char data[32];
};

#endif /* __SOUND_ASOUND_FM_H */