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Diffstat (limited to 'include/sound/seq_midi_emul.h')
| -rw-r--r-- | include/sound/seq_midi_emul.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/include/sound/seq_midi_emul.h b/include/sound/seq_midi_emul.h new file mode 100644 index 000000000..88799d1e1 --- /dev/null +++ b/include/sound/seq_midi_emul.h @@ -0,0 +1,184 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_SEQ_MIDI_EMUL_H +#define __SOUND_SEQ_MIDI_EMUL_H + +/* + * Midi channel definition for optional channel management. + * + * Copyright (C) 1999 Steve Ratcliffe + */ + +#include <sound/seq_kernel.h> + +/* + * This structure is used to keep track of the current state on each + * channel. All drivers for hardware that does not understand midi + * directly will probably need to use this structure. + */ +struct snd_midi_channel { + void *private; /* A back pointer to driver data */ + int number; /* The channel number */ + int client; /* The client associated with this channel */ + int port; /* The port associated with this channel */ + + unsigned char midi_mode; /* GM, GS, XG etc */ + unsigned int + drum_channel:1, /* Drum channel */ + param_type:1 /* RPN/NRPN */ + ; + + unsigned char midi_aftertouch; /* Aftertouch (key pressure) */ + unsigned char midi_pressure; /* Channel pressure */ + unsigned char midi_program; /* Instrument number */ + short midi_pitchbend; /* Pitch bend amount */ + + unsigned char control[128]; /* Current value of all controls */ + unsigned char note[128]; /* Current status for all notes */ + + short gm_rpn_pitch_bend_range; /* Pitch bend range */ + short gm_rpn_fine_tuning; /* Master fine tuning */ + short gm_rpn_coarse_tuning; /* Master coarse tuning */ + +}; + +/* + * A structure that represets a set of channels bound to a port. There + * would usually be 16 channels per port. But fewer could be used for + * particular cases. + * The channel set consists of information describing the client and + * port for this midi synth and an array of snd_midi_channel structures. + * A driver that had no need for snd_midi_channel could still use the + * channel set type if it wished with the channel array null. + */ +struct snd_midi_channel_set { + void *private_data; /* Driver data */ + int client; /* Client for this port */ + int port; /* The port number */ + + int max_channels; /* Size of the channels array */ + struct snd_midi_channel *channels; + + unsigned char midi_mode; /* MIDI operating mode */ + unsigned char gs_master_volume; /* SYSEX master volume: 0-127 */ + unsigned char gs_chorus_mode; + unsigned char gs_reverb_mode; + +}; + +struct snd_midi_op { + void (*note_on)(void *private_data, int note, int vel, struct snd_midi_channel *chan); + void (*note_off)(void *private_data,int note, int vel, struct snd_midi_channel *chan); /* release note */ + void (*key_press)(void *private_data, int note, int vel, struct snd_midi_channel *chan); + void (*note_terminate)(void *private_data, int note, struct snd_midi_channel *chan); /* terminate note immediately */ + void (*control)(void *private_data, int type, struct snd_midi_channel *chan); + void (*nrpn)(void *private_data, struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset); + void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed, + struct snd_midi_channel_set *chset); +}; + +/* + * These defines are used so that pitchbend, aftertouch etc, can be + * distinguished from controller values. + */ +/* 0-127 controller values */ +#define MIDI_CTL_PITCHBEND 0x80 +#define MIDI_CTL_AFTERTOUCH 0x81 +#define MIDI_CTL_CHAN_PRESSURE 0x82 + +/* + * These names exist to allow symbolic access to the controls array. + * The usage is eg: chan->gm_bank_select. Another implementation would + * be really have these members in the struct, and not the array. + */ +#define gm_bank_select control[0] +#define gm_modulation control[1] +#define gm_breath control[2] +#define gm_foot_pedal control[4] +#define gm_portamento_time control[5] +#define gm_data_entry control[6] +#define gm_volume control[7] +#define gm_balance control[8] +#define gm_pan control[10] +#define gm_expression control[11] +#define gm_effect_control1 control[12] +#define gm_effect_control2 control[13] +#define gm_slider1 control[16] +#define gm_slider2 control[17] +#define gm_slider3 control[18] +#define gm_slider4 control[19] + +#define gm_bank_select_lsb control[32] +#define gm_modulation_wheel_lsb control[33] +#define gm_breath_lsb control[34] +#define gm_foot_pedal_lsb control[36] +#define gm_portamento_time_lsb control[37] +#define gm_data_entry_lsb control[38] +#define gm_volume_lsb control[39] +#define gm_balance_lsb control[40] +#define gm_pan_lsb control[42] +#define gm_expression_lsb control[43] +#define gm_effect_control1_lsb control[44] +#define gm_effect_control2_lsb control[45] + +#define gm_sustain control[MIDI_CTL_SUSTAIN] +#define gm_hold gm_sustain +#define gm_portamento control[MIDI_CTL_PORTAMENTO] +#define gm_sostenuto control[MIDI_CTL_SOSTENUTO] + +/* + * These macros give the complete value of the controls that consist + * of coarse and fine pairs. Of course the fine controls are seldom used + * but there is no harm in being complete. + */ +#define SNDRV_GM_BANK_SELECT(cp) (((cp)->control[0]<<7)|((cp)->control[32])) +#define SNDRV_GM_MODULATION_WHEEL(cp) (((cp)->control[1]<<7)|((cp)->control[33])) +#define SNDRV_GM_BREATH(cp) (((cp)->control[2]<<7)|((cp)->control[34])) +#define SNDRV_GM_FOOT_PEDAL(cp) (((cp)->control[4]<<7)|((cp)->control[36])) +#define SNDRV_GM_PORTAMENTO_TIME(cp) (((cp)->control[5]<<7)|((cp)->control[37])) +#define SNDRV_GM_DATA_ENTRY(cp) (((cp)->control[6]<<7)|((cp)->control[38])) +#define SNDRV_GM_VOLUME(cp) (((cp)->control[7]<<7)|((cp)->control[39])) +#define SNDRV_GM_BALANCE(cp) (((cp)->control[8]<<7)|((cp)->control[40])) +#define SNDRV_GM_PAN(cp) (((cp)->control[10]<<7)|((cp)->control[42])) +#define SNDRV_GM_EXPRESSION(cp) (((cp)->control[11]<<7)|((cp)->control[43])) + + +/* MIDI mode */ +#define SNDRV_MIDI_MODE_NONE 0 /* Generic midi */ +#define SNDRV_MIDI_MODE_GM 1 +#define SNDRV_MIDI_MODE_GS 2 +#define SNDRV_MIDI_MODE_XG 3 +#define SNDRV_MIDI_MODE_MT32 4 + +/* MIDI note state */ +#define SNDRV_MIDI_NOTE_OFF 0x00 +#define SNDRV_MIDI_NOTE_ON 0x01 +#define SNDRV_MIDI_NOTE_RELEASED 0x02 +#define SNDRV_MIDI_NOTE_SOSTENUTO 0x04 + +#define SNDRV_MIDI_PARAM_TYPE_REGISTERED 0 +#define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED 1 + +/* SYSEX parse flag */ +enum { + SNDRV_MIDI_SYSEX_NOT_PARSED = 0, + SNDRV_MIDI_SYSEX_GM_ON, + SNDRV_MIDI_SYSEX_GS_ON, + SNDRV_MIDI_SYSEX_GS_RESET, + SNDRV_MIDI_SYSEX_GS_CHORUS_MODE, + SNDRV_MIDI_SYSEX_GS_REVERB_MODE, + SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME, + SNDRV_MIDI_SYSEX_GS_PROGRAM, + SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL, + SNDRV_MIDI_SYSEX_XG_ON, +}; + +/* Prototypes for midi_process.c */ +void snd_midi_process_event(const struct snd_midi_op *ops, + struct snd_seq_event *ev, + struct snd_midi_channel_set *chanset); +void snd_midi_channel_set_clear(struct snd_midi_channel_set *chset); +struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n); +void snd_midi_channel_free_set(struct snd_midi_channel_set *chset); + +#endif /* __SOUND_SEQ_MIDI_EMUL_H */ |