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-rw-r--r--include/sound/seq_device.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/include/sound/seq_device.h b/include/sound/seq_device.h
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+#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 */