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