include/sound/seq_midi_emul.h

   1 #ifndef __SOUND_SEQ_MIDI_EMUL_H
   2 #define __SOUND_SEQ_MIDI_EMUL_H
   3
   4 /*
   5  *  Midi channel definition for optional channel management.
   6  *
   7  *  Copyright (C) 1999 Steve Ratcliffe
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include "seq_kernel.h"
  26
  27 /*
  28  * This structure is used to keep track of the current state on each
  29  * channel.  All drivers for hardware that does not understand midi
  30  * directly will probably need to use this structure.
  31  */
  32 typedef struct snd_midi_channel {
  33         void *private;          /* A back pointer to driver data */
  34         int  number;            /* The channel number */
  35         int  client;            /* The client associated with this channel */
  36         int  port;              /* The port associated with this channel */
  37
  38         unsigned char midi_mode;        /* GM, GS, XG etc */
  39         unsigned int
  40                 drum_channel:1,         /* Drum channel */
  41                 param_type:1            /* RPN/NRPN */
  42                 ;
  43
  44         unsigned char midi_aftertouch;  /* Aftertouch (key pressure) */
  45         unsigned char midi_pressure;    /* Channel pressure */
  46         unsigned char midi_program;     /* Instrument number */
  47         short midi_pitchbend;           /* Pitch bend amount */
  48
  49         unsigned char control[128];     /* Current value of all controls */
  50         unsigned char note[128];        /* Current status for all notes */
  51
  52         short gm_rpn_pitch_bend_range;  /* Pitch bend range */
  53         short gm_rpn_fine_tuning;       /* Master fine tuning */
  54         short gm_rpn_coarse_tuning;     /* Master coarse tuning */
  55
  56 } snd_midi_channel_t;
  57
  58 /*
  59  * A structure that represets a set of channels bound to a port.  There
  60  * would usually be 16 channels per port.  But fewer could be used for
  61  * particular cases.
  62  * The channel set consists of information describing the client and
  63  * port for this midi synth and an array of snd_midi_channel_t structures.
  64  * A driver that had no need for snd_midi_channel_t could still use the
  65  * channel set type if it wished with the channel array null.
  66  */
  67 typedef struct snd_midi_channel_set {
  68         void *private_data;             /* Driver data */
  69         int  client;                    /* Client for this port */
  70         int  port;                      /* The port number */
  71
  72         int  max_channels;              /* Size of the channels array */
  73         snd_midi_channel_t *channels;
  74
  75         unsigned char midi_mode;        /* MIDI operating mode */
  76         unsigned char gs_master_volume; /* SYSEX master volume: 0-127 */
  77         unsigned char gs_chorus_mode;
  78         unsigned char gs_reverb_mode;
  79
  80 } snd_midi_channel_set_t;
  81
  82 typedef struct snd_seq_midi_op {
  83         void (*note_on)(void *private_data, int note, int vel, snd_midi_channel_t *chan);
  84         void (*note_off)(void *private_data,int note, int vel, snd_midi_channel_t *chan); /* release note */
  85         void (*key_press)(void *private_data, int note, int vel, snd_midi_channel_t *chan);
  86         void (*note_terminate)(void *private_data, int note, snd_midi_channel_t *chan); /* terminate note immediately */
  87         void (*control)(void *private_data, int type, snd_midi_channel_t *chan);
  88         void (*nrpn)(void *private_data, snd_midi_channel_t *chan, snd_midi_channel_set_t *chset);
  89         void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed, snd_midi_channel_set_t *chset);
  90 } snd_midi_op_t;
  91
  92 /*
  93  * These defines are used so that pitchbend, aftertouch etc, can be
  94  * distinguished from controller values.
  95  */
  96 /* 0-127 controller values */
  97 #define MIDI_CTL_PITCHBEND      0x80
  98 #define MIDI_CTL_AFTERTOUCH     0x81
  99 #define MIDI_CTL_CHAN_PRESSURE  0x82
 100
 101 /*
 102  * These names exist to allow symbolic access to the controls array.
 103  * The usage is eg: chan->gm_bank_select.  Another implementation would
 104  * be really have these members in the struct, and not the array.
 105  */
 106 #define gm_bank_select          control[0]
 107 #define gm_modulation           control[1]
 108 #define gm_breath               control[2]
 109 #define gm_foot_pedal           control[4]
 110 #define gm_portamento_time      control[5]
 111 #define gm_data_entry           control[6]
 112 #define gm_volume               control[7]
 113 #define gm_balance              control[8]
 114 #define gm_pan                  control[10]
 115 #define gm_expression           control[11]
 116 #define gm_effect_control1      control[12]
 117 #define gm_effect_control2      control[13]
 118 #define gm_slider1              control[16]
 119 #define gm_slider2              control[17]
 120 #define gm_slider3              control[18]
 121 #define gm_slider4              control[19]
 122
 123 #define gm_bank_select_lsb      control[32]
 124 #define gm_modulation_wheel_lsb control[33]
 125 #define gm_breath_lsb           control[34]
 126 #define gm_foot_pedal_lsb       control[36]
 127 #define gm_portamento_time_lsb  control[37]
 128 #define gm_data_entry_lsb       control[38]
 129 #define gm_volume_lsb           control[39]
 130 #define gm_balance_lsb          control[40]
 131 #define gm_pan_lsb              control[42]
 132 #define gm_expression_lsb       control[43]
 133 #define gm_effect_control1_lsb  control[44]
 134 #define gm_effect_control2_lsb  control[45]
 135
 136 #define gm_sustain              control[MIDI_CTL_SUSTAIN]
 137 #define gm_hold                 gm_sustain
 138 #define gm_portamento           control[MIDI_CTL_PORTAMENTO]
 139 #define gm_sostenuto            control[MIDI_CTL_SOSTENUTO]
 140
 141 /*
 142  * These macros give the complete value of the controls that consist
 143  * of coarse and fine pairs.  Of course the fine controls are seldom used
 144  * but there is no harm in being complete.
 145  */
 146 #define SNDRV_GM_BANK_SELECT(cp)                (((cp)->control[0]<<7)|((cp)->control[32]))
 147 #define SNDRV_GM_MODULATION_WHEEL(cp)   (((cp)->control[1]<<7)|((cp)->control[33]))
 148 #define SNDRV_GM_BREATH(cp)             (((cp)->control[2]<<7)|((cp)->control[34]))
 149 #define SNDRV_GM_FOOT_PEDAL(cp)         (((cp)->control[4]<<7)|((cp)->control[36]))
 150 #define SNDRV_GM_PORTAMENTO_TIME(cp)    (((cp)->control[5]<<7)|((cp)->control[37]))
 151 #define SNDRV_GM_DATA_ENTRY(cp)         (((cp)->control[6]<<7)|((cp)->control[38]))
 152 #define SNDRV_GM_VOLUME(cp)             (((cp)->control[7]<<7)|((cp)->control[39]))
 153 #define SNDRV_GM_BALANCE(cp)            (((cp)->control[8]<<7)|((cp)->control[40]))
 154 #define SNDRV_GM_PAN(cp)                        (((cp)->control[10]<<7)|((cp)->control[42]))
 155 #define SNDRV_GM_EXPRESSION(cp)         (((cp)->control[11]<<7)|((cp)->control[43]))
 156
 157
 158 /* MIDI mode */
 159 #define SNDRV_MIDI_MODE_NONE    0       /* Generic midi */
 160 #define SNDRV_MIDI_MODE_GM      1
 161 #define SNDRV_MIDI_MODE_GS      2
 162 #define SNDRV_MIDI_MODE_XG      3
 163 #define SNDRV_MIDI_MODE_MT32    4
 164
 165 /* MIDI note state */
 166 #define SNDRV_MIDI_NOTE_OFF             0x00
 167 #define SNDRV_MIDI_NOTE_ON              0x01
 168 #define SNDRV_MIDI_NOTE_RELEASED                0x02
 169 #define SNDRV_MIDI_NOTE_SOSTENUTO               0x04
 170
 171 #define SNDRV_MIDI_PARAM_TYPE_REGISTERED                0
 172 #define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED     1
 173
 174 /* SYSEX parse flag */
 175 enum {
 176         SNDRV_MIDI_SYSEX_NOT_PARSED = 0,
 177         SNDRV_MIDI_SYSEX_GM_ON,
 178         SNDRV_MIDI_SYSEX_GS_ON,
 179         SNDRV_MIDI_SYSEX_GS_RESET,
 180         SNDRV_MIDI_SYSEX_GS_CHORUS_MODE,
 181         SNDRV_MIDI_SYSEX_GS_REVERB_MODE,
 182         SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME,
 183         SNDRV_MIDI_SYSEX_GS_PROGRAM,
 184         SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL,
 185         SNDRV_MIDI_SYSEX_XG_ON,
 186 };
 187
 188 /* Prototypes for midi_process.c */
 189 void snd_midi_process_event(snd_midi_op_t *ops, snd_seq_event_t *ev,
 190                             snd_midi_channel_set_t *chanset);
 191 void snd_midi_channel_set_clear(snd_midi_channel_set_t *chset);
 192 snd_midi_channel_set_t *snd_midi_channel_alloc_set(int n);
 193 void snd_midi_channel_free_set(snd_midi_channel_set_t *chset);
 194
 195 #endif /* __SOUND_SEQ_MIDI_EMUL_H */