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linux-headers-6.8.0-88
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seq_midi_emul.h
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/* 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 */