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 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 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 /* NOTE: this shouldn't be greater than MAX_LOCKDEP_SUBCLASSES */ 53 #define SNDRV_SEQ_MAX_HOPS 8 54 55 /* max size of event size */ 56 #define SNDRV_SEQ_MAX_EVENT_LEN 0x3fffffff 57 58 /* call-backs for kernel port */ 59 struct snd_seq_port_callback { 60 struct module *owner; 61 void *private_data; 62 int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info); 63 int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info); 64 int (*use)(void *private_data, struct snd_seq_port_subscribe *info); 65 int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info); 66 int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop); 67 void (*private_free)(void *private_data); 68 /*...*/ 69 }; 70 71 /* interface for kernel client */ 72 __printf(3, 4) 73 int snd_seq_create_kernel_client(struct snd_card *card, int client_index, 74 const char *name_fmt, ...); 75 int snd_seq_delete_kernel_client(int client); 76 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop); 77 int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop); 78 int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg); 79 80 #define SNDRV_SEQ_EXT_MASK 0xc0000000 81 #define SNDRV_SEQ_EXT_USRPTR 0x80000000 82 #define SNDRV_SEQ_EXT_CHAINED 0x40000000 83 84 typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count); 85 int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf, 86 int in_kernel, int size_aligned); 87 int snd_seq_dump_var_event(const struct snd_seq_event *event, 88 snd_seq_dump_func_t func, void *private_data); 89 90 /* interface for OSS emulation */ 91 int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo); 92 93 /* port callback routines */ 94 void snd_port_init_callback(struct snd_seq_port_callback *p); 95 struct snd_seq_port_callback *snd_port_alloc_callback(void); 96 97 /* port attach/detach */ 98 int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp, 99 int cap, int type, int midi_channels, int midi_voices, char *portname); 100 int snd_seq_event_port_detach(int client, int port); 101 102 #ifdef CONFIG_MODULES 103 void snd_seq_autoload_init(void); 104 void snd_seq_autoload_exit(void); 105 #else 106 #define snd_seq_autoload_init() 107 #define snd_seq_autoload_exit() 108 #endif 109 110 #endif /* __SOUND_SEQ_KERNEL_H */ 111