include/sound/asound_fm.h

   1 #ifndef __SOUND_ASOUND_FM_H
   2 #define __SOUND_ASOUND_FM_H
   3
   4 /*
   5  *  Advanced Linux Sound Architecture - ALSA
   6  *
   7  *  Interface file between ALSA driver & user space
   8  *  Copyright (c) 1994-98 by Jaroslav Kysela <perex@perex.cz>,
   9  *                           4Front Technologies
  10  *
  11  *  Direct FM control
  12  *
  13  *   This program is free software; you can redistribute it and/or modify
  14  *   it under the terms of the GNU General Public License as published by
  15  *   the Free Software Foundation; either version 2 of the License, or
  16  *   (at your option) any later version.
  17  *
  18  *   This program is distributed in the hope that it will be useful,
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *   GNU General Public License for more details.
  22  *
  23  *   You should have received a copy of the GNU General Public License
  24  *   along with this program; if not, write to the Free Software
  25  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26  *
  27  */
  28
  29 #define SNDRV_DM_FM_MODE_OPL2   0x00
  30 #define SNDRV_DM_FM_MODE_OPL3   0x01
  31
  32 struct snd_dm_fm_info {
  33         unsigned char fm_mode;          /* OPL mode, see SNDRV_DM_FM_MODE_XXX */
  34         unsigned char rhythm;           /* percussion mode flag */
  35 };
  36
  37 /*
  38  *  Data structure composing an FM "note" or sound event.
  39  */
  40
  41 struct snd_dm_fm_voice {
  42         unsigned char op;               /* operator cell (0 or 1) */
  43         unsigned char voice;            /* FM voice (0 to 17) */
  44
  45         unsigned char am;               /* amplitude modulation */
  46         unsigned char vibrato;          /* vibrato effect */
  47         unsigned char do_sustain;       /* sustain phase */
  48         unsigned char kbd_scale;        /* keyboard scaling */
  49         unsigned char harmonic;         /* 4 bits: harmonic and multiplier */
  50         unsigned char scale_level;      /* 2 bits: decrease output freq rises */
  51         unsigned char volume;           /* 6 bits: volume */
  52
  53         unsigned char attack;           /* 4 bits: attack rate */
  54         unsigned char decay;            /* 4 bits: decay rate */
  55         unsigned char sustain;          /* 4 bits: sustain level */
  56         unsigned char release;          /* 4 bits: release rate */
  57
  58         unsigned char feedback;         /* 3 bits: feedback for op0 */
  59         unsigned char connection;       /* 0 for serial, 1 for parallel */
  60         unsigned char left;             /* stereo left */
  61         unsigned char right;            /* stereo right */
  62         unsigned char waveform;         /* 3 bits: waveform shape */
  63 };
  64
  65 /*
  66  *  This describes an FM note by its voice, octave, frequency number (10bit)
  67  *  and key on/off.
  68  */
  69
  70 struct snd_dm_fm_note {
  71         unsigned char voice;    /* 0-17 voice channel */
  72         unsigned char octave;   /* 3 bits: what octave to play */
  73         unsigned int fnum;      /* 10 bits: frequency number */
  74         unsigned char key_on;   /* set for active, clear for silent */
  75 };
  76
  77 /*
  78  *  FM parameters that apply globally to all voices, and thus are not "notes"
  79  */
  80
  81 struct snd_dm_fm_params {
  82         unsigned char am_depth;         /* amplitude modulation depth (1=hi) */
  83         unsigned char vib_depth;        /* vibrato depth (1=hi) */
  84         unsigned char kbd_split;        /* keyboard split */
  85         unsigned char rhythm;           /* percussion mode select */
  86
  87         /* This block is the percussion instrument data */
  88         unsigned char bass;
  89         unsigned char snare;
  90         unsigned char tomtom;
  91         unsigned char cymbal;
  92         unsigned char hihat;
  93 };
  94
  95 /*
  96  *  FM mode ioctl settings
  97  */
  98
  99 #define SNDRV_DM_FM_IOCTL_INFO          _IOR('H', 0x20, struct snd_dm_fm_info)
 100 #define SNDRV_DM_FM_IOCTL_RESET         _IO ('H', 0x21)
 101 #define SNDRV_DM_FM_IOCTL_PLAY_NOTE     _IOW('H', 0x22, struct snd_dm_fm_note)
 102 #define SNDRV_DM_FM_IOCTL_SET_VOICE     _IOW('H', 0x23, struct snd_dm_fm_voice)
 103 #define SNDRV_DM_FM_IOCTL_SET_PARAMS    _IOW('H', 0x24, struct snd_dm_fm_params)
 104 #define SNDRV_DM_FM_IOCTL_SET_MODE      _IOW('H', 0x25, int)
 105 /* for OPL3 only */
 106 #define SNDRV_DM_FM_IOCTL_SET_CONNECTION        _IOW('H', 0x26, int)
 107
 108 #define SNDRV_DM_FM_OSS_IOCTL_RESET             0x20
 109 #define SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE         0x21
 110 #define SNDRV_DM_FM_OSS_IOCTL_SET_VOICE         0x22
 111 #define SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS        0x23
 112 #define SNDRV_DM_FM_OSS_IOCTL_SET_MODE          0x24
 113 #define SNDRV_DM_FM_OSS_IOCTL_SET_OPL           0x25
 114
 115 #endif /* __SOUND_ASOUND_FM_H */