include/sound/seq_kernel.h

   1 #ifndef __SOUND_SEQ_KERNEL_H
   2 #define __SOUND_SEQ_KERNEL_H
   3
   4 /*
   5  *  Main kernel header file for the ALSA sequencer
   6  *  Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
   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 <linux/time.h>
  25 #include "asequencer.h"
  26
  27 typedef struct snd_seq_real_time snd_seq_real_time_t;
  28 typedef union snd_seq_timestamp snd_seq_timestamp_t;
  29
  30 /* maximum number of events dequeued per schedule interval */
  31 #define SNDRV_SEQ_MAX_DEQUEUE           50
  32
  33 /* maximum number of queues */
  34 #define SNDRV_SEQ_MAX_QUEUES            8
  35
  36 /* max number of concurrent clients */
  37 #define SNDRV_SEQ_MAX_CLIENTS           192
  38
  39 /* max number of concurrent ports */
  40 #define SNDRV_SEQ_MAX_PORTS             254
  41
  42 /* max number of events in memory pool */
  43 #define SNDRV_SEQ_MAX_EVENTS            2000
  44
  45 /* default number of events in memory chunk */
  46 #define SNDRV_SEQ_DEFAULT_CHUNK_EVENTS  64
  47
  48 /* default number of events in memory pool */
  49 #define SNDRV_SEQ_DEFAULT_EVENTS        500
  50
  51 /* max number of events in memory pool for one client (outqueue) */
  52 #define SNDRV_SEQ_MAX_CLIENT_EVENTS     2000
  53
  54 /* default number of events in memory pool for one client (outqueue) */
  55 #define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS 200
  56
  57 /* max delivery path length */
  58 #define SNDRV_SEQ_MAX_HOPS              10
  59
  60 /* max size of event size */
  61 #define SNDRV_SEQ_MAX_EVENT_LEN         0x3fffffff
  62
  63 /* call-backs for kernel port */
  64 struct snd_seq_port_callback {
  65         struct module *owner;
  66         void *private_data;
  67         int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info);
  68         int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info);
  69         int (*use)(void *private_data, struct snd_seq_port_subscribe *info);
  70         int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info);
  71         int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
  72         void (*private_free)(void *private_data);
  73         unsigned int callback_all;      /* call subscribe callbacks at each connection/disconnection */
  74         /*...*/
  75 };
  76
  77 /* interface for kernel client */
  78 int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
  79                                  const char *name_fmt, ...)
  80         __attribute__ ((format (printf, 3, 4)));
  81 int snd_seq_delete_kernel_client(int client);
  82 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  83 int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);
  84 int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
  85
  86 #define SNDRV_SEQ_EXT_MASK      0xc0000000
  87 #define SNDRV_SEQ_EXT_USRPTR    0x80000000
  88 #define SNDRV_SEQ_EXT_CHAINED   0x40000000
  89
  90 typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);
  91 int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf,
  92                              int in_kernel, int size_aligned);
  93 int snd_seq_dump_var_event(const struct snd_seq_event *event,
  94                            snd_seq_dump_func_t func, void *private_data);
  95
  96 /* interface for OSS emulation */
  97 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
  98
  99 /* port callback routines */
 100 void snd_port_init_callback(struct snd_seq_port_callback *p);
 101 struct snd_seq_port_callback *snd_port_alloc_callback(void);
 102
 103 /* port attach/detach */
 104 int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp,
 105                               int cap, int type, int midi_channels, int midi_voices, char *portname);
 106 int snd_seq_event_port_detach(int client, int port);
 107
 108 #ifdef CONFIG_MODULES
 109 void snd_seq_autoload_lock(void);
 110 void snd_seq_autoload_unlock(void);
 111 #else
 112 #define snd_seq_autoload_lock()
 113 #define snd_seq_autoload_unlock()
 114 #endif
 115
 116 #endif /* __SOUND_SEQ_KERNEL_H */