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1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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2 | #ifndef __SOUND_SEQ_MIDI_EMUL_H |
3 | #define __SOUND_SEQ_MIDI_EMUL_H |
4 | |
5 | /* |
6 | * Midi channel definition for optional channel management. |
7 | * |
8 | * Copyright (C) 1999 Steve Ratcliffe |
9 | */ |
10 | |
11 | #include <sound/seq_kernel.h> |
12 | |
13 | /* |
14 | * This structure is used to keep track of the current state on each |
15 | * channel. All drivers for hardware that does not understand midi |
16 | * directly will probably need to use this structure. |
17 | */ |
18 | struct snd_midi_channel { |
19 | void *private; /* A back pointer to driver data */ |
20 | int number; /* The channel number */ |
21 | int client; /* The client associated with this channel */ |
22 | int port; /* The port associated with this channel */ |
23 | |
24 | unsigned char midi_mode; /* GM, GS, XG etc */ |
25 | unsigned int |
26 | drum_channel:1, /* Drum channel */ |
27 | param_type:1 /* RPN/NRPN */ |
28 | ; |
29 | |
30 | unsigned char midi_aftertouch; /* Aftertouch (key pressure) */ |
31 | unsigned char midi_pressure; /* Channel pressure */ |
32 | unsigned char midi_program; /* Instrument number */ |
33 | short midi_pitchbend; /* Pitch bend amount */ |
34 | |
35 | unsigned char control[128]; /* Current value of all controls */ |
36 | unsigned char note[128]; /* Current status for all notes */ |
37 | |
38 | short gm_rpn_pitch_bend_range; /* Pitch bend range */ |
39 | short gm_rpn_fine_tuning; /* Master fine tuning */ |
40 | short gm_rpn_coarse_tuning; /* Master coarse tuning */ |
41 | |
42 | }; |
43 | |
44 | /* |
45 | * A structure that represets a set of channels bound to a port. There |
46 | * would usually be 16 channels per port. But fewer could be used for |
47 | * particular cases. |
48 | * The channel set consists of information describing the client and |
49 | * port for this midi synth and an array of snd_midi_channel structures. |
50 | * A driver that had no need for snd_midi_channel could still use the |
51 | * channel set type if it wished with the channel array null. |
52 | */ |
53 | struct snd_midi_channel_set { |
54 | void *private_data; /* Driver data */ |
55 | int client; /* Client for this port */ |
56 | int port; /* The port number */ |
57 | |
58 | int max_channels; /* Size of the channels array */ |
59 | struct snd_midi_channel *channels; |
60 | |
61 | unsigned char midi_mode; /* MIDI operating mode */ |
62 | unsigned char gs_master_volume; /* SYSEX master volume: 0-127 */ |
63 | unsigned char gs_chorus_mode; |
64 | unsigned char gs_reverb_mode; |
65 | |
66 | }; |
67 | |
68 | struct snd_midi_op { |
69 | void (*note_on)(void *private_data, int note, int vel, struct snd_midi_channel *chan); |
70 | void (*note_off)(void *private_data,int note, int vel, struct snd_midi_channel *chan); /* release note */ |
71 | void (*key_press)(void *private_data, int note, int vel, struct snd_midi_channel *chan); |
72 | void (*note_terminate)(void *private_data, int note, struct snd_midi_channel *chan); /* terminate note immediately */ |
73 | void (*control)(void *private_data, int type, struct snd_midi_channel *chan); |
74 | void (*nrpn)(void *private_data, struct snd_midi_channel *chan, |
75 | struct snd_midi_channel_set *chset); |
76 | void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed, |
77 | struct snd_midi_channel_set *chset); |
78 | }; |
79 | |
80 | /* |
81 | * These defines are used so that pitchbend, aftertouch etc, can be |
82 | * distinguished from controller values. |
83 | */ |
84 | /* 0-127 controller values */ |
85 | #define MIDI_CTL_PITCHBEND 0x80 |
86 | #define MIDI_CTL_AFTERTOUCH 0x81 |
87 | #define MIDI_CTL_CHAN_PRESSURE 0x82 |
88 | |
89 | /* |
90 | * These names exist to allow symbolic access to the controls array. |
91 | * The usage is eg: chan->gm_bank_select. Another implementation would |
92 | * be really have these members in the struct, and not the array. |
93 | */ |
94 | #define gm_bank_select control[0] |
95 | #define gm_modulation control[1] |
96 | #define gm_breath control[2] |
97 | #define gm_foot_pedal control[4] |
98 | #define gm_portamento_time control[5] |
99 | #define gm_data_entry control[6] |
100 | #define gm_volume control[7] |
101 | #define gm_balance control[8] |
102 | #define gm_pan control[10] |
103 | #define gm_expression control[11] |
104 | #define gm_effect_control1 control[12] |
105 | #define gm_effect_control2 control[13] |
106 | #define gm_slider1 control[16] |
107 | #define gm_slider2 control[17] |
108 | #define gm_slider3 control[18] |
109 | #define gm_slider4 control[19] |
110 | |
111 | #define gm_bank_select_lsb control[32] |
112 | #define gm_modulation_wheel_lsb control[33] |
113 | #define gm_breath_lsb control[34] |
114 | #define gm_foot_pedal_lsb control[36] |
115 | #define gm_portamento_time_lsb control[37] |
116 | #define gm_data_entry_lsb control[38] |
117 | #define gm_volume_lsb control[39] |
118 | #define gm_balance_lsb control[40] |
119 | #define gm_pan_lsb control[42] |
120 | #define gm_expression_lsb control[43] |
121 | #define gm_effect_control1_lsb control[44] |
122 | #define gm_effect_control2_lsb control[45] |
123 | |
124 | #define gm_sustain control[MIDI_CTL_SUSTAIN] |
125 | #define gm_hold gm_sustain |
126 | #define gm_portamento control[MIDI_CTL_PORTAMENTO] |
127 | #define gm_sostenuto control[MIDI_CTL_SOSTENUTO] |
128 | |
129 | /* |
130 | * These macros give the complete value of the controls that consist |
131 | * of coarse and fine pairs. Of course the fine controls are seldom used |
132 | * but there is no harm in being complete. |
133 | */ |
134 | #define SNDRV_GM_BANK_SELECT(cp) (((cp)->control[0]<<7)|((cp)->control[32])) |
135 | #define SNDRV_GM_MODULATION_WHEEL(cp) (((cp)->control[1]<<7)|((cp)->control[33])) |
136 | #define SNDRV_GM_BREATH(cp) (((cp)->control[2]<<7)|((cp)->control[34])) |
137 | #define SNDRV_GM_FOOT_PEDAL(cp) (((cp)->control[4]<<7)|((cp)->control[36])) |
138 | #define SNDRV_GM_PORTAMENTO_TIME(cp) (((cp)->control[5]<<7)|((cp)->control[37])) |
139 | #define SNDRV_GM_DATA_ENTRY(cp) (((cp)->control[6]<<7)|((cp)->control[38])) |
140 | #define SNDRV_GM_VOLUME(cp) (((cp)->control[7]<<7)|((cp)->control[39])) |
141 | #define SNDRV_GM_BALANCE(cp) (((cp)->control[8]<<7)|((cp)->control[40])) |
142 | #define SNDRV_GM_PAN(cp) (((cp)->control[10]<<7)|((cp)->control[42])) |
143 | #define SNDRV_GM_EXPRESSION(cp) (((cp)->control[11]<<7)|((cp)->control[43])) |
144 | |
145 | |
146 | /* MIDI mode */ |
147 | #define SNDRV_MIDI_MODE_NONE 0 /* Generic midi */ |
148 | #define SNDRV_MIDI_MODE_GM 1 |
149 | #define SNDRV_MIDI_MODE_GS 2 |
150 | #define SNDRV_MIDI_MODE_XG 3 |
151 | #define SNDRV_MIDI_MODE_MT32 4 |
152 | |
153 | /* MIDI note state */ |
154 | #define SNDRV_MIDI_NOTE_OFF 0x00 |
155 | #define SNDRV_MIDI_NOTE_ON 0x01 |
156 | #define SNDRV_MIDI_NOTE_RELEASED 0x02 |
157 | #define SNDRV_MIDI_NOTE_SOSTENUTO 0x04 |
158 | |
159 | #define SNDRV_MIDI_PARAM_TYPE_REGISTERED 0 |
160 | #define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED 1 |
161 | |
162 | /* SYSEX parse flag */ |
163 | enum { |
164 | SNDRV_MIDI_SYSEX_NOT_PARSED = 0, |
165 | SNDRV_MIDI_SYSEX_GM_ON, |
166 | SNDRV_MIDI_SYSEX_GS_ON, |
167 | SNDRV_MIDI_SYSEX_GS_RESET, |
168 | SNDRV_MIDI_SYSEX_GS_CHORUS_MODE, |
169 | SNDRV_MIDI_SYSEX_GS_REVERB_MODE, |
170 | SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME, |
171 | SNDRV_MIDI_SYSEX_GS_PROGRAM, |
172 | SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL, |
173 | SNDRV_MIDI_SYSEX_XG_ON, |
174 | }; |
175 | |
176 | /* Prototypes for midi_process.c */ |
177 | void snd_midi_process_event(const struct snd_midi_op *ops, |
178 | struct snd_seq_event *ev, |
179 | struct snd_midi_channel_set *chanset); |
180 | void snd_midi_channel_set_clear(struct snd_midi_channel_set *chset); |
181 | struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n); |
182 | void snd_midi_channel_free_set(struct snd_midi_channel_set *chset); |
183 | |
184 | #endif /* __SOUND_SEQ_MIDI_EMUL_H */ |
185 |
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