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1 | #ifndef __SOUND_SEQ_DEVICE_H |
2 | #define __SOUND_SEQ_DEVICE_H |
3 | |
4 | /* |
5 | * ALSA sequencer device management |
6 | * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | * |
22 | */ |
23 | |
24 | /* |
25 | * registered device information |
26 | */ |
27 | |
28 | #define ID_LEN 32 |
29 | |
30 | /* status flag */ |
31 | #define SNDRV_SEQ_DEVICE_FREE 0 |
32 | #define SNDRV_SEQ_DEVICE_REGISTERED 1 |
33 | |
34 | struct snd_seq_device { |
35 | /* device info */ |
36 | struct snd_card *card; /* sound card */ |
37 | int device; /* device number */ |
38 | char id[ID_LEN]; /* driver id */ |
39 | char name[80]; /* device name */ |
40 | int argsize; /* size of the argument */ |
41 | void *driver_data; /* private data for driver */ |
42 | int status; /* flag - read only */ |
43 | void *private_data; /* private data for the caller */ |
44 | void (*private_free)(struct snd_seq_device *device); |
45 | struct list_head list; /* link to next device */ |
46 | }; |
47 | |
48 | |
49 | /* driver operators |
50 | * init_device: |
51 | * Initialize the device with given parameters. |
52 | * Typically, |
53 | * 1. call snd_hwdep_new |
54 | * 2. allocate private data and initialize it |
55 | * 3. call snd_hwdep_register |
56 | * 4. store the instance to dev->driver_data pointer. |
57 | * |
58 | * free_device: |
59 | * Release the private data. |
60 | * Typically, call snd_device_free(dev->card, dev->driver_data) |
61 | */ |
62 | struct snd_seq_dev_ops { |
63 | int (*init_device)(struct snd_seq_device *dev); |
64 | int (*free_device)(struct snd_seq_device *dev); |
65 | }; |
66 | |
67 | /* |
68 | * prototypes |
69 | */ |
70 | void snd_seq_device_load_drivers(void); |
71 | int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result); |
72 | int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, int argsize); |
73 | int snd_seq_device_unregister_driver(char *id); |
74 | |
75 | #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device)) |
76 | |
77 | |
78 | /* |
79 | * id strings for generic devices |
80 | */ |
81 | #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" |
82 | #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" |
83 | |
84 | #endif /* __SOUND_SEQ_DEVICE_H */ |
85 |
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