#ifndef __SOUND_SEQ_DEVICE_H #define __SOUND_SEQ_DEVICE_H /* * ALSA sequencer device management * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ typedef struct snd_seq_device snd_seq_device_t; typedef struct snd_seq_dev_ops snd_seq_dev_ops_t; /* * registered device information */ #define ID_LEN 32 /* status flag */ #define SNDRV_SEQ_DEVICE_FREE 0 #define SNDRV_SEQ_DEVICE_REGISTERED 1 struct snd_seq_device { /* device info */ snd_card_t *card; /* sound card */ int device; /* device number */ char id[ID_LEN]; /* driver id */ char name[80]; /* device name */ int argsize; /* size of the argument */ void *driver_data; /* private data for driver */ int status; /* flag - read only */ void *private_data; /* private data for the caller */ void (*private_free)(snd_seq_device_t *device); struct list_head list; /* link to next device */ }; /* driver operators * init_device: * Initialize the device with given parameters. * Typically, * 1. call snd_hwdep_new * 2. allocate private data and initialize it * 3. call snd_hwdep_register * 4. store the instance to dev->driver_data pointer. * * free_device: * Release the private data. * Typically, call snd_device_free(dev->card, dev->driver_data) */ struct snd_seq_dev_ops { int (*init_device)(snd_seq_device_t *dev); int (*free_device)(snd_seq_device_t *dev); }; /* * prototypes */ void snd_seq_device_load_drivers(void); int snd_seq_device_new(snd_card_t *card, int device, char *id, int argsize, snd_seq_device_t **result); int snd_seq_device_register_driver(char *id, snd_seq_dev_ops_t *entry, int argsize); int snd_seq_device_unregister_driver(char *id); #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(snd_seq_device_t)) /* * id strings for generic devices */ #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi" #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth" #endif /* __SOUND_SEQ_DEVICE_H */