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