Root/include/sound/seq_virmidi.h

1#ifndef __SOUND_SEQ_VIRMIDI_H
2#define __SOUND_SEQ_VIRMIDI_H
3
4/*
5 * Virtual Raw MIDI client on Sequencer
6 * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,
7 * Jaroslav Kysela <perex@perex.cz>
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 <sound/rawmidi.h>
26#include <sound/seq_midi_event.h>
27
28/*
29 * device file instance:
30 * This instance is created at each time the midi device file is
31 * opened. Each instance has its own input buffer and MIDI parser
32 * (buffer), and is associated with the device instance.
33 */
34struct snd_virmidi {
35    struct list_head list;
36    int seq_mode;
37    int client;
38    int port;
39    unsigned int trigger: 1;
40    struct snd_midi_event *parser;
41    struct snd_seq_event event;
42    struct snd_virmidi_dev *rdev;
43    struct snd_rawmidi_substream *substream;
44};
45
46#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0)
47#define SNDRV_VIRMIDI_USE (1<<1)
48
49/*
50 * device record:
51 * Each virtual midi device has one device instance. It contains
52 * common information and the linked-list of opened files,
53 */
54struct snd_virmidi_dev {
55    struct snd_card *card; /* associated card */
56    struct snd_rawmidi *rmidi; /* rawmidi device */
57    int seq_mode; /* SNDRV_VIRMIDI_XXX */
58    int device; /* sequencer device */
59    int client; /* created/attached client */
60    int port; /* created/attached port */
61    unsigned int flags; /* SNDRV_VIRMIDI_* */
62    rwlock_t filelist_lock;
63    struct list_head filelist;
64};
65
66/* sequencer mode:
67 * ATTACH = input/output events from midi device are routed to the
68 * attached sequencer port. sequencer port is not created
69 * by virmidi itself.
70 * the input to rawmidi must be processed by passing the
71 * incoming events via snd_virmidi_receive()
72 * DISPATCH = input/output events are routed to subscribers.
73 * sequencer port is created in virmidi.
74 */
75#define SNDRV_VIRMIDI_SEQ_NONE 0
76#define SNDRV_VIRMIDI_SEQ_ATTACH 1
77#define SNDRV_VIRMIDI_SEQ_DISPATCH 2
78
79int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
80
81#endif /* __SOUND_SEQ_VIRMIDI */
82

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