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 (at) 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_KMOD 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 */ 117
