include/sound/seq_instr.h

   1 #ifndef __SOUND_SEQ_INSTR_H
   2 #define __SOUND_SEQ_INSTR_H
   3
   4 /*
   5  *  Main kernel header file for the ALSA sequencer
   6  *  Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
   7  *
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24 #include "seq_kernel.h"
  25
  26 /* Instrument cluster */
  27 struct snd_seq_kcluster {
  28         snd_seq_instr_cluster_t cluster;
  29         char name[32];
  30         int priority;
  31         struct snd_seq_kcluster *next;
  32 };
  33
  34 /* return pointer to private data */
  35 #define KINSTR_DATA(kinstr)     (void *)(((char *)kinstr) + sizeof(struct snd_seq_kinstr))
  36
  37 /* Instrument structure */
  38 struct snd_seq_kinstr {
  39         struct snd_seq_instr instr;
  40         char name[32];
  41         int type;                       /* instrument type */
  42         int use;                        /* use count */
  43         int busy;                       /* not useable */
  44         int add_len;                    /* additional length */
  45         struct snd_seq_kinstr_ops *ops; /* operations */
  46         struct snd_seq_kinstr *next;
  47 };
  48
  49 #define SNDRV_SEQ_INSTR_HASH_SIZE               32
  50
  51 /* Instrument flags */
  52 #define SNDRV_SEQ_INSTR_FLG_DIRECT      (1<<0)  /* accept only direct events */
  53
  54 /* List of all instruments */
  55 struct snd_seq_kinstr_list {
  56         struct snd_seq_kinstr *hash[SNDRV_SEQ_INSTR_HASH_SIZE];
  57         int count;                      /* count of all instruments */
  58
  59         struct snd_seq_kcluster *chash[SNDRV_SEQ_INSTR_HASH_SIZE];
  60         int ccount;                     /* count of all clusters */
  61
  62         int owner;                      /* current owner of the instrument list */
  63         unsigned int flags;
  64
  65         spinlock_t lock;
  66         spinlock_t ops_lock;
  67         struct semaphore ops_mutex;
  68         unsigned long ops_flags;
  69 };
  70
  71 #define SNDRV_SEQ_INSTR_NOTIFY_REMOVE   0
  72 #define SNDRV_SEQ_INSTR_NOTIFY_CHANGE   1
  73
  74 struct snd_seq_kinstr_ops {
  75         void *private_data;
  76         long add_len;                   /* additional length */
  77         char *instr_type;
  78         int (*info)(void *private_data, char *info_data, long len);
  79         int (*put)(void *private_data, struct snd_seq_kinstr *kinstr,
  80                    char __user *instr_data, long len, int atomic, int cmd);
  81         int (*get)(void *private_data, struct snd_seq_kinstr *kinstr,
  82                    char __user *instr_data, long len, int atomic, int cmd);
  83         int (*get_size)(void *private_data, struct snd_seq_kinstr *kinstr, long *size);
  84         int (*remove)(void *private_data, struct snd_seq_kinstr *kinstr, int atomic);
  85         void (*notify)(void *private_data, struct snd_seq_kinstr *kinstr, int what);
  86         struct snd_seq_kinstr_ops *next;
  87 };
  88
  89
  90 /* instrument operations */
  91 struct snd_seq_kinstr_list *snd_seq_instr_list_new(void);
  92 void snd_seq_instr_list_free(struct snd_seq_kinstr_list **list);
  93 int snd_seq_instr_list_free_cond(struct snd_seq_kinstr_list *list,
  94                                  struct snd_seq_instr_header *ifree,
  95                                  int client,
  96                                  int atomic);
  97 struct snd_seq_kinstr *snd_seq_instr_find(struct snd_seq_kinstr_list *list,
  98                                           struct snd_seq_instr *instr,
  99                                           int exact,
 100                                           int follow_alias);
 101 void snd_seq_instr_free_use(struct snd_seq_kinstr_list *list,
 102                             struct snd_seq_kinstr *instr);
 103 int snd_seq_instr_event(struct snd_seq_kinstr_ops *ops,
 104                         struct snd_seq_kinstr_list *list,
 105                         struct snd_seq_event *ev,
 106                         int client,
 107                         int atomic,
 108                         int hop);
 109
 110 #endif /* __SOUND_SEQ_INSTR_H */