mirror of
https://github.com/torvalds/linux.git
synced 2024-11-02 10:11:36 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/*
|
|
* ALSA sequencer Ports
|
|
* Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
#ifndef __SND_SEQ_PORTS_H
|
|
#define __SND_SEQ_PORTS_H
|
|
|
|
#include <sound/seq_kernel.h>
|
|
#include "seq_lock.h"
|
|
|
|
/* list of 'exported' ports */
|
|
|
|
/* Client ports that are not exported are still accessible, but are
|
|
anonymous ports.
|
|
|
|
If a port supports SUBSCRIPTION, that port can send events to all
|
|
subscribersto a special address, with address
|
|
(queue==SNDRV_SEQ_ADDRESS_SUBSCRIBERS). The message is then send to all
|
|
recipients that are registered in the subscription list. A typical
|
|
application for these SUBSCRIPTION events is handling of incoming MIDI
|
|
data. The port doesn't 'know' what other clients are interested in this
|
|
message. If for instance a MIDI recording application would like to receive
|
|
the events from that port, it will first have to subscribe with that port.
|
|
|
|
*/
|
|
|
|
typedef struct subscribers_t {
|
|
snd_seq_port_subscribe_t info; /* additional info */
|
|
struct list_head src_list; /* link of sources */
|
|
struct list_head dest_list; /* link of destinations */
|
|
atomic_t ref_count;
|
|
} subscribers_t;
|
|
|
|
typedef struct port_subs_info_t {
|
|
struct list_head list_head; /* list of subscribed ports */
|
|
unsigned int count; /* count of subscribers */
|
|
unsigned int exclusive: 1; /* exclusive mode */
|
|
struct rw_semaphore list_mutex;
|
|
rwlock_t list_lock;
|
|
snd_seq_kernel_port_open_t *open;
|
|
snd_seq_kernel_port_close_t *close;
|
|
} port_subs_info_t;
|
|
|
|
typedef struct client_port_t {
|
|
|
|
snd_seq_addr_t addr; /* client/port number */
|
|
struct module *owner; /* owner of this port */
|
|
char name[64]; /* port name */
|
|
struct list_head list; /* port list */
|
|
snd_use_lock_t use_lock;
|
|
|
|
/* subscribers */
|
|
port_subs_info_t c_src; /* read (sender) list */
|
|
port_subs_info_t c_dest; /* write (dest) list */
|
|
|
|
snd_seq_kernel_port_input_t *event_input;
|
|
snd_seq_kernel_port_private_free_t *private_free;
|
|
void *private_data;
|
|
unsigned int callback_all : 1;
|
|
unsigned int closing : 1;
|
|
unsigned int timestamping: 1;
|
|
unsigned int time_real: 1;
|
|
int time_queue;
|
|
|
|
/* capability, inport, output, sync */
|
|
unsigned int capability; /* port capability bits */
|
|
unsigned int type; /* port type bits */
|
|
|
|
/* supported channels */
|
|
int midi_channels;
|
|
int midi_voices;
|
|
int synth_voices;
|
|
|
|
} client_port_t;
|
|
|
|
/* return pointer to port structure and lock port */
|
|
client_port_t *snd_seq_port_use_ptr(client_t *client, int num);
|
|
|
|
/* search for next port - port is locked if found */
|
|
client_port_t *snd_seq_port_query_nearest(client_t *client, snd_seq_port_info_t *pinfo);
|
|
|
|
/* unlock the port */
|
|
#define snd_seq_port_unlock(port) snd_use_lock_free(&(port)->use_lock)
|
|
|
|
/* create a port, port number is returned (-1 on failure) */
|
|
client_port_t *snd_seq_create_port(client_t *client, int port_index);
|
|
|
|
/* delete a port */
|
|
int snd_seq_delete_port(client_t *client, int port);
|
|
|
|
/* delete all ports */
|
|
int snd_seq_delete_all_ports(client_t *client);
|
|
|
|
/* set port info fields */
|
|
int snd_seq_set_port_info(client_port_t *port, snd_seq_port_info_t *info);
|
|
|
|
/* get port info fields */
|
|
int snd_seq_get_port_info(client_port_t *port, snd_seq_port_info_t *info);
|
|
|
|
/* add subscriber to subscription list */
|
|
int snd_seq_port_connect(client_t *caller, client_t *s, client_port_t *sp, client_t *d, client_port_t *dp, snd_seq_port_subscribe_t *info);
|
|
|
|
/* remove subscriber from subscription list */
|
|
int snd_seq_port_disconnect(client_t *caller, client_t *s, client_port_t *sp, client_t *d, client_port_t *dp, snd_seq_port_subscribe_t *info);
|
|
|
|
/* subscribe port */
|
|
int snd_seq_port_subscribe(client_port_t *port, snd_seq_port_subscribe_t *info);
|
|
|
|
/* get matched subscriber */
|
|
subscribers_t *snd_seq_port_get_subscription(port_subs_info_t *src_grp, snd_seq_addr_t *dest_addr);
|
|
|
|
#endif
|