| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | typedef struct snd_seq_device snd_seq_device_t; |
| 25 | typedef struct snd_seq_dev_ops snd_seq_dev_ops_t; |
| 26 | |
| 27 | /* |
| 28 | * registered device information |
| 29 | */ |
| 30 | |
| 31 | #define ID_LEN 32 |
| 32 | |
| 33 | /* status flag */ |
| 34 | #define SNDRV_SEQ_DEVICE_FREE 0 |
| 35 | #define SNDRV_SEQ_DEVICE_REGISTERED 1 |
| 36 | |
| 37 | struct snd_seq_device { |
| 38 | /* device info */ |
| 39 | snd_card_t *card; /* sound card */ |
| 40 | int device; /* device number */ |
| 41 | char id[ID_LEN]; /* driver id */ |
| 42 | char name[80]; /* device name */ |
| 43 | int argsize; /* size of the argument */ |
| 44 | void *driver_data; /* private data for driver */ |
| 45 | int status; /* flag - read only */ |
| 46 | void *private_data; /* private data for the caller */ |
| 47 | void (*private_free)(snd_seq_device_t *device); |
| 48 | struct list_head list; /* link to next device */ |
| 49 | }; |
| 50 | |
| 51 | |
| 52 | /* driver operators |
| 53 | * init_device: |
| 54 | * Initialize the device with given parameters. |
| 55 | * Typically, |
| 56 | * 1. call snd_hwdep_new |
| 57 | * 2. allocate private data and initialize it |
| 58 | * 3. call snd_hwdep_register |
| 59 | * 4. store the instance to dev->driver_data pointer. |
| 60 | * |
| 61 | * free_device: |
| 62 | * Release the private data. |
| 63 | * Typically, call snd_device_free(dev->card, dev->driver_data) |
| 64 | */ |
| 65 | struct snd_seq_dev_ops { |
| 66 | int (*init_device)(snd_seq_device_t *dev); |
| 67 | int (*free_device)(snd_seq_device_t *dev); |
| 68 | }; |
| 69 | |
| 70 | /* |
| 71 | * prototypes |
| 72 | */ |
| 73 | void snd_seq_device_load_drivers(void); |
| 74 | int snd_seq_device_new(snd_card_t *card, int device, char *id, int argsize, snd_seq_device_t **result); |
| 75 | int snd_seq_device_register_driver(char *id, snd_seq_dev_ops_t *entry, int argsize); |
| 76 | int snd_seq_device_unregister_driver(char *id); |
| 77 | |
| 78 | #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(snd_seq_device_t)) |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | * id strings for generic devices |
| 83 | */ |
| 84 | #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" |
| 85 | #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" |
| 86 | |
| 87 | |
| 88 | #endif /* __SOUND_SEQ_DEVICE_H */ |