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seq_device.h
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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 <[email protected]>
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 
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 */
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  */
65 };
66 
67 /*
68  * prototypes
69  */
71 int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result);
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 */