linux/include/sound/seq_midi_emul.h
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   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 <sound/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 */
  32struct 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};
  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 structures.
  64 * A driver that had no need for snd_midi_channel could still use the
  65 * channel set type if it wished with the channel array null.
  66 */
  67struct 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        struct snd_midi_channel *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};
  81
  82struct snd_midi_op {
  83        void (*note_on)(void *private_data, int note, int vel, struct snd_midi_channel *chan);
  84        void (*note_off)(void *private_data,int note, int vel, struct snd_midi_channel *chan); /* release note */
  85        void (*key_press)(void *private_data, int note, int vel, struct snd_midi_channel *chan);
  86        void (*note_terminate)(void *private_data, int note, struct snd_midi_channel *chan); /* terminate note immediately */
  87        void (*control)(void *private_data, int type, struct snd_midi_channel *chan);
  88        void (*nrpn)(void *private_data, struct snd_midi_channel *chan,
  89                     struct snd_midi_channel_set *chset);
  90        void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed,
  91                      struct snd_midi_channel_set *chset);
  92};
  93
  94/*
  95 * These defines are used so that pitchbend, aftertouch etc, can be
  96 * distinguished from controller values.
  97 */
  98/* 0-127 controller values */
  99#define MIDI_CTL_PITCHBEND      0x80
 100#define MIDI_CTL_AFTERTOUCH     0x81
 101#define MIDI_CTL_CHAN_PRESSURE  0x82
 102
 103/*
 104 * These names exist to allow symbolic access to the controls array.
 105 * The usage is eg: chan->gm_bank_select.  Another implementation would
 106 * be really have these members in the struct, and not the array.
 107 */
 108#define gm_bank_select          control[0]
 109#define gm_modulation           control[1]
 110#define gm_breath               control[2]
 111#define gm_foot_pedal           control[4]
 112#define gm_portamento_time      control[5]
 113#define gm_data_entry           control[6]
 114#define gm_volume               control[7]
 115#define gm_balance              control[8]
 116#define gm_pan                  control[10]
 117#define gm_expression           control[11]
 118#define gm_effect_control1      control[12]
 119#define gm_effect_control2      control[13]
 120#define gm_slider1              control[16]
 121#define gm_slider2              control[17]
 122#define gm_slider3              control[18]
 123#define gm_slider4              control[19]
 124
 125#define gm_bank_select_lsb      control[32]
 126#define gm_modulation_wheel_lsb control[33]
 127#define gm_breath_lsb           control[34]
 128#define gm_foot_pedal_lsb       control[36]
 129#define gm_portamento_time_lsb  control[37]
 130#define gm_data_entry_lsb       control[38]
 131#define gm_volume_lsb           control[39]
 132#define gm_balance_lsb          control[40]
 133#define gm_pan_lsb              control[42]
 134#define gm_expression_lsb       control[43]
 135#define gm_effect_control1_lsb  control[44]
 136#define gm_effect_control2_lsb  control[45]
 137
 138#define gm_sustain              control[MIDI_CTL_SUSTAIN]
 139#define gm_hold                 gm_sustain
 140#define gm_portamento           control[MIDI_CTL_PORTAMENTO]
 141#define gm_sostenuto            control[MIDI_CTL_SOSTENUTO]
 142
 143/*
 144 * These macros give the complete value of the controls that consist
 145 * of coarse and fine pairs.  Of course the fine controls are seldom used
 146 * but there is no harm in being complete.
 147 */
 148#define SNDRV_GM_BANK_SELECT(cp)                (((cp)->control[0]<<7)|((cp)->control[32]))
 149#define SNDRV_GM_MODULATION_WHEEL(cp)   (((cp)->control[1]<<7)|((cp)->control[33]))
 150#define SNDRV_GM_BREATH(cp)             (((cp)->control[2]<<7)|((cp)->control[34]))
 151#define SNDRV_GM_FOOT_PEDAL(cp)         (((cp)->control[4]<<7)|((cp)->control[36]))
 152#define SNDRV_GM_PORTAMENTO_TIME(cp)    (((cp)->control[5]<<7)|((cp)->control[37]))
 153#define SNDRV_GM_DATA_ENTRY(cp)         (((cp)->control[6]<<7)|((cp)->control[38]))
 154#define SNDRV_GM_VOLUME(cp)             (((cp)->control[7]<<7)|((cp)->control[39]))
 155#define SNDRV_GM_BALANCE(cp)            (((cp)->control[8]<<7)|((cp)->control[40]))
 156#define SNDRV_GM_PAN(cp)                        (((cp)->control[10]<<7)|((cp)->control[42]))
 157#define SNDRV_GM_EXPRESSION(cp)         (((cp)->control[11]<<7)|((cp)->control[43]))
 158
 159
 160/* MIDI mode */
 161#define SNDRV_MIDI_MODE_NONE    0       /* Generic midi */
 162#define SNDRV_MIDI_MODE_GM      1
 163#define SNDRV_MIDI_MODE_GS      2
 164#define SNDRV_MIDI_MODE_XG      3
 165#define SNDRV_MIDI_MODE_MT32    4
 166
 167/* MIDI note state */
 168#define SNDRV_MIDI_NOTE_OFF             0x00
 169#define SNDRV_MIDI_NOTE_ON              0x01
 170#define SNDRV_MIDI_NOTE_RELEASED                0x02
 171#define SNDRV_MIDI_NOTE_SOSTENUTO               0x04
 172 
 173#define SNDRV_MIDI_PARAM_TYPE_REGISTERED                0
 174#define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED     1
 175
 176/* SYSEX parse flag */
 177enum {
 178        SNDRV_MIDI_SYSEX_NOT_PARSED = 0,
 179        SNDRV_MIDI_SYSEX_GM_ON, 
 180        SNDRV_MIDI_SYSEX_GS_ON, 
 181        SNDRV_MIDI_SYSEX_GS_RESET,      
 182        SNDRV_MIDI_SYSEX_GS_CHORUS_MODE,
 183        SNDRV_MIDI_SYSEX_GS_REVERB_MODE,
 184        SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME,
 185        SNDRV_MIDI_SYSEX_GS_PROGRAM,
 186        SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL,
 187        SNDRV_MIDI_SYSEX_XG_ON, 
 188};
 189
 190/* Prototypes for midi_process.c */
 191void snd_midi_process_event(struct snd_midi_op *ops, struct snd_seq_event *ev,
 192                            struct snd_midi_channel_set *chanset);
 193void snd_midi_channel_set_clear(struct snd_midi_channel_set *chset);
 194struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n);
 195void snd_midi_channel_free_set(struct snd_midi_channel_set *chset);
 196
 197#endif /* __SOUND_SEQ_MIDI_EMUL_H */
 198
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