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