LXR linux/include/sound/seq

   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 <sound/asequencer.h>
  26
  27typedef struct snd_seq_real_time snd_seq_real_time_t;
  28typedef union snd_seq_timestamp snd_seq_timestamp_t;
  29
  30/* maximum number of queues */
  31#define SNDRV_SEQ_MAX_QUEUES            32
  32
  33/* max number of concurrent clients */
  34#define SNDRV_SEQ_MAX_CLIENTS           192
  35
  36/* max number of concurrent ports */
  37#define SNDRV_SEQ_MAX_PORTS             254
  38
  39/* max number of events in memory pool */
  40#define SNDRV_SEQ_MAX_EVENTS            2000
  41
  42/* default number of events in memory pool */
  43#define SNDRV_SEQ_DEFAULT_EVENTS        500
  44
  45/* max number of events in memory pool for one client (outqueue) */
  46#define SNDRV_SEQ_MAX_CLIENT_EVENTS     2000
  47
  48/* default number of events in memory pool for one client (outqueue) */
  49#define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS 200
  50
  51/* max delivery path length */
  52#define SNDRV_SEQ_MAX_HOPS              10
  53
  54/* max size of event size */
  55#define SNDRV_SEQ_MAX_EVENT_LEN         0x3fffffff
  56
  57/* call-backs for kernel port */
  58struct snd_seq_port_callback {
  59        struct module *owner;
  60        void *private_data;
  61        int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info);
  62        int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info);
  63        int (*use)(void *private_data, struct snd_seq_port_subscribe *info);
  64        int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info);
  65        int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
  66        void (*private_free)(void *private_data);
  67        /*...*/
  68};
  69
  70/* interface for kernel client */
  71__printf(3, 4)
  72int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
  73                                 const char *name_fmt, ...);
  74int snd_seq_delete_kernel_client(int client);
  75int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  76int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);
  77int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
  78
  79#define SNDRV_SEQ_EXT_MASK      0xc0000000
  80#define SNDRV_SEQ_EXT_USRPTR    0x80000000
  81#define SNDRV_SEQ_EXT_CHAINED   0x40000000
  82
  83typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);
  84int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf,
  85                             int in_kernel, int size_aligned);
  86int snd_seq_dump_var_event(const struct snd_seq_event *event,
  87                           snd_seq_dump_func_t func, void *private_data);
  88
  89/* interface for OSS emulation */
  90int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
  91
  92/* port callback routines */
  93void snd_port_init_callback(struct snd_seq_port_callback *p);
  94struct snd_seq_port_callback *snd_port_alloc_callback(void);
  95
  96/* port attach/detach */
  97int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp,
  98                              int cap, int type, int midi_channels, int midi_voices, char *portname);
  99int snd_seq_event_port_detach(int client, int port);
 100
 101#ifdef CONFIG_MODULES
 102void snd_seq_autoload_init(void);
 103void snd_seq_autoload_exit(void);
 104#else
 105#define snd_seq_autoload_init()
 106#define snd_seq_autoload_exit()
 107#endif
 108
 109#endif /* __SOUND_SEQ_KERNEL_H */
 110