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seq_instr.h

#ifndef __SOUND_SEQ_INSTR_H
#define __SOUND_SEQ_INSTR_H

/*
 *  Main kernel header file for the ALSA sequencer
 *  Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   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
 *
 */
#include "seq_kernel.h"

/* Instrument cluster */
struct snd_seq_kcluster {
      snd_seq_instr_cluster_t cluster;
      char name[32];
      int priority;
      struct snd_seq_kcluster *next;
};

/* return pointer to private data */
#define KINSTR_DATA(kinstr)   (void *)(((char *)kinstr) + sizeof(struct snd_seq_kinstr))

/* Instrument structure */
struct snd_seq_kinstr {
      struct snd_seq_instr instr;
      char name[32];
      int type;               /* instrument type */
      int use;                /* use count */
      int busy;               /* not useable */
      int add_len;                  /* additional length */
      struct snd_seq_kinstr_ops *ops;     /* operations */
      struct snd_seq_kinstr *next;
};

#define SNDRV_SEQ_INSTR_HASH_SIZE         32

/* Instrument flags */
#define SNDRV_SEQ_INSTR_FLG_DIRECT  (1<<0)      /* accept only direct events */

/* List of all instruments */
struct snd_seq_kinstr_list {
      struct snd_seq_kinstr *hash[SNDRV_SEQ_INSTR_HASH_SIZE];
      int count;              /* count of all instruments */
      
      struct snd_seq_kcluster *chash[SNDRV_SEQ_INSTR_HASH_SIZE];
      int ccount;             /* count of all clusters */

      int owner;              /* current owner of the instrument list */
      unsigned int flags;

      spinlock_t lock;
      spinlock_t ops_lock;
      struct mutex ops_mutex;
      unsigned long ops_flags;
};

#define SNDRV_SEQ_INSTR_NOTIFY_REMOVE     0
#define SNDRV_SEQ_INSTR_NOTIFY_CHANGE     1

struct snd_seq_kinstr_ops {
      void *private_data;
      long add_len;                 /* additional length */
      char *instr_type;
      int (*info)(void *private_data, char *info_data, long len);
      int (*put)(void *private_data, struct snd_seq_kinstr *kinstr,
               char __user *instr_data, long len, int atomic, int cmd);
      int (*get)(void *private_data, struct snd_seq_kinstr *kinstr,
               char __user *instr_data, long len, int atomic, int cmd);
      int (*get_size)(void *private_data, struct snd_seq_kinstr *kinstr, long *size);
      int (*remove)(void *private_data, struct snd_seq_kinstr *kinstr, int atomic);
      void (*notify)(void *private_data, struct snd_seq_kinstr *kinstr, int what);
      struct snd_seq_kinstr_ops *next;
};


/* instrument operations */
struct snd_seq_kinstr_list *snd_seq_instr_list_new(void);
void snd_seq_instr_list_free(struct snd_seq_kinstr_list **list);
int snd_seq_instr_list_free_cond(struct snd_seq_kinstr_list *list,
                         struct snd_seq_instr_header *ifree,
                         int client,
                         int atomic);
struct snd_seq_kinstr *snd_seq_instr_find(struct snd_seq_kinstr_list *list,
                                struct snd_seq_instr *instr,
                                int exact,
                                int follow_alias);
void snd_seq_instr_free_use(struct snd_seq_kinstr_list *list,
                      struct snd_seq_kinstr *instr);
int snd_seq_instr_event(struct snd_seq_kinstr_ops *ops,
                  struct snd_seq_kinstr_list *list,
                  struct snd_seq_event *ev,
                  int client,
                  int atomic,
                  int hop);

#endif /* __SOUND_SEQ_INSTR_H */

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