alsa-lib/include/seq.h

/**
 * \file <alsa/seq.h>
 * \brief Application interface library for the ALSA driver
 * \author Jaroslav Kysela <perex@suse.cz>
 * \author Abramo Bagnara <abramo@alsa-project.org>
 * \author Takashi Iwai <tiwai@suse.de>
 * \date 1998-2001
 *
 * Application interface library for the ALSA driver
 *
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library 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 Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef __ALSA_SEQ_H
#define __ALSA_SEQ_H

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  \defgroup Sequencer MIDI Sequencer
 *  MIDI Sequencer Interface
 *  \{
 */

/** dlsym version for interface entry callback */
#define SND_SEQ_DLSYM_VERSION		_dlsym_seq_001

/** Sequencer handle */
typedef struct _snd_seq snd_seq_t;

/** \internal */
#define SND_ALLOCA(type,ptr) \
do {\
	assert(ptr);\
	*ptr = (type##_t *)alloca(type##_sizeof());\
	memset(*ptr, 0, type##_sizeof());\
} while (0)

/**
 * sequencer opening stream types
 */
#define SND_SEQ_OPEN_OUTPUT	1	/**< open for output (write) */
#define SND_SEQ_OPEN_INPUT	2	/**< open for input (read) */
#define SND_SEQ_OPEN_DUPLEX	(SND_SEQ_OPEN_OUTPUT|SND_SEQ_OPEN_INPUT)	/**< open for both input and output (read/write) */

/**
 * sequencer opening mode
 */
#define SND_SEQ_NONBLOCK	1	/**< non-blocking mode */

/** sequencer handle type */
typedef enum _snd_seq_type {
	SND_SEQ_TYPE_HW,		/**< hardware */
	SND_SEQ_TYPE_SHM,		/**< shared memory (NYI) */
	SND_SEQ_TYPE_INET,		/**< network (NYI) */
} snd_seq_type_t;

/** special client (port) ids */
#define SND_SEQ_ADDRESS_UNKNOWN		253	/**< unknown source */
#define SND_SEQ_ADDRESS_SUBSCRIBERS	254	/**< send event to all subscribed ports */
#define SND_SEQ_ADDRESS_BROADCAST	255	/**< send event to all queues/clients/ports/channels */

/** known client numbers */
#define SND_SEQ_CLIENT_SYSTEM		0	/**< system client */
#define SND_SEQ_CLIENT_DUMMY		62	/**< dummy ports */
#define SND_SEQ_CLIENT_OSS		63	/**< oss sequencer emulator */

/*
 */
int snd_seq_open(snd_seq_t **handle, const char *name, int streams, int mode);
int snd_seq_open_lconf(snd_seq_t **handle, const char *name, int streams, int mode, snd_config_t *lconf);
const char *snd_seq_name(snd_seq_t *seq);
snd_seq_type_t snd_seq_type(snd_seq_t *seq);
int snd_seq_close(snd_seq_t *handle);
int snd_seq_poll_descriptors_count(snd_seq_t *handle, short events);
int snd_seq_poll_descriptors(snd_seq_t *handle, struct pollfd *pfds, unsigned int space, short events);
int snd_seq_poll_descriptors_revents(snd_seq_t *seq, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
int snd_seq_nonblock(snd_seq_t *handle, int nonblock);
int snd_seq_client_id(snd_seq_t *handle);

size_t snd_seq_get_output_buffer_size(snd_seq_t *handle);
size_t snd_seq_get_input_buffer_size(snd_seq_t *handle);
int snd_seq_set_output_buffer_size(snd_seq_t *handle, size_t size);
int snd_seq_set_input_buffer_size(snd_seq_t *handle, size_t size);

/** system information container */
typedef struct _snd_seq_system_info snd_seq_system_info_t;

size_t snd_seq_system_info_sizeof(void);
/** allocate a #snd_seq_system_info_t container on stack */
#define snd_seq_system_info_alloca(ptr) \
	SND_ALLOCA(snd_seq_system_info, ptr)
int snd_seq_system_info_malloc(snd_seq_system_info_t **ptr);
void snd_seq_system_info_free(snd_seq_system_info_t *ptr);
void snd_seq_system_info_copy(snd_seq_system_info_t *dst, const snd_seq_system_info_t *src);

int snd_seq_system_info_get_queues(const snd_seq_system_info_t *info);
int snd_seq_system_info_get_clients(const snd_seq_system_info_t *info);
int snd_seq_system_info_get_ports(const snd_seq_system_info_t *info);
int snd_seq_system_info_get_channels(const snd_seq_system_info_t *info);
int snd_seq_system_info_get_cur_clients(const snd_seq_system_info_t *info);
int snd_seq_system_info_get_cur_queues(const snd_seq_system_info_t *info);

int snd_seq_system_info(snd_seq_t *handle, snd_seq_system_info_t *info);

/** \} */


/**
 *  \defgroup SeqClient Sequencer Client Interface
 *  Sequencer Client Interface
 *  \ingroup Sequencer
 *  \{
 */

/** client information container */
typedef struct _snd_seq_client_info snd_seq_client_info_t;

/** client types */
typedef enum snd_seq_client_type {
	SND_SEQ_USER_CLIENT     = 1,	/**< user client */
	SND_SEQ_KERNEL_CLIENT   = 2	/**< kernel client */
} snd_seq_client_type_t;
                        
size_t snd_seq_client_info_sizeof(void);
/** allocate a #snd_seq_client_info_t container on stack */
#define snd_seq_client_info_alloca(ptr) \
	SND_ALLOCA(snd_seq_client_info, ptr)
int snd_seq_client_info_malloc(snd_seq_client_info_t **ptr);
void snd_seq_client_info_free(snd_seq_client_info_t *ptr);
void snd_seq_client_info_copy(snd_seq_client_info_t *dst, const snd_seq_client_info_t *src);

int snd_seq_client_info_get_client(const snd_seq_client_info_t *info);
snd_seq_client_type_t snd_seq_client_info_get_type(const snd_seq_client_info_t *info);
const char *snd_seq_client_info_get_name(snd_seq_client_info_t *info);
int snd_seq_client_info_get_broadcast_filter(const snd_seq_client_info_t *info);
int snd_seq_client_info_get_error_bounce(const snd_seq_client_info_t *info);
const unsigned char *snd_seq_client_info_get_event_filter(const snd_seq_client_info_t *info);
int snd_seq_client_info_get_num_ports(const snd_seq_client_info_t *info);
int snd_seq_client_info_get_event_lost(const snd_seq_client_info_t *info);

void snd_seq_client_info_set_client(snd_seq_client_info_t *info, int client);
void snd_seq_client_info_set_name(snd_seq_client_info_t *info, const char *name);
void snd_seq_client_info_set_broadcast_filter(snd_seq_client_info_t *info, int val);
void snd_seq_client_info_set_error_bounce(snd_seq_client_info_t *info, int val);
void snd_seq_client_info_set_event_filter(snd_seq_client_info_t *info, unsigned char *filter);

int snd_seq_get_client_info(snd_seq_t *handle, snd_seq_client_info_t *info);
int snd_seq_get_any_client_info(snd_seq_t *handle, int client, snd_seq_client_info_t *info);
int snd_seq_set_client_info(snd_seq_t *handle, snd_seq_client_info_t *info);
int snd_seq_query_next_client(snd_seq_t *handle, snd_seq_client_info_t *info);

/*
 */

/** client pool information container */
typedef struct _snd_seq_client_pool snd_seq_client_pool_t;

size_t snd_seq_client_pool_sizeof(void);
/** allocate a #snd_seq_client_pool_t container on stack */
#define snd_seq_client_pool_alloca(ptr) \
	SND_ALLOCA(snd_seq_client_pool, ptr)
int snd_seq_client_pool_malloc(snd_seq_client_pool_t **ptr);
void snd_seq_client_pool_free(snd_seq_client_pool_t *ptr);
void snd_seq_client_pool_copy(snd_seq_client_pool_t *dst, const snd_seq_client_pool_t *src);

int snd_seq_client_pool_get_client(const snd_seq_client_pool_t *info);
size_t snd_seq_client_pool_get_output_pool(const snd_seq_client_pool_t *info);
size_t snd_seq_client_pool_get_input_pool(const snd_seq_client_pool_t *info);
size_t snd_seq_client_pool_get_output_room(const snd_seq_client_pool_t *info);
size_t snd_seq_client_pool_get_output_free(const snd_seq_client_pool_t *info);
size_t snd_seq_client_pool_get_input_free(const snd_seq_client_pool_t *info);
void snd_seq_client_pool_set_output_pool(snd_seq_client_pool_t *info, size_t size);
void snd_seq_client_pool_set_input_pool(snd_seq_client_pool_t *info, size_t size);
void snd_seq_client_pool_set_output_room(snd_seq_client_pool_t *info, size_t size);

int snd_seq_get_client_pool(snd_seq_t *handle, snd_seq_client_pool_t *info);
int snd_seq_set_client_pool(snd_seq_t *handle, snd_seq_client_pool_t *info);


/** \} */


/**
 *  \defgroup SeqPort Sequencer Port Interface
 *  Sequencer Port Interface
 *  \ingroup Sequencer
 *  \{
 */

/** port information container */
typedef struct _snd_seq_port_info snd_seq_port_info_t;

/** known port numbers */
#define SND_SEQ_PORT_SYSTEM_TIMER	0	/**< system timer port */
#define SND_SEQ_PORT_SYSTEM_ANNOUNCE	1	/**< sysem announce port */

/** port capabilities (32 bits) */
#define SND_SEQ_PORT_CAP_READ		(1<<0)	/**< readable from this port */
#define SND_SEQ_PORT_CAP_WRITE		(1<<1)	/**< writable to this port */

#define SND_SEQ_PORT_CAP_SYNC_READ	(1<<2)	/**< allow read subscriptions */
#define SND_SEQ_PORT_CAP_SYNC_WRITE	(1<<3)	/**< allow write subscriptions */

#define SND_SEQ_PORT_CAP_DUPLEX		(1<<4)	/**< allow read/write duplex */

#define SND_SEQ_PORT_CAP_SUBS_READ	(1<<5)	/**< allow read subscription */
#define SND_SEQ_PORT_CAP_SUBS_WRITE	(1<<6)	/**< allow write subscription */
#define SND_SEQ_PORT_CAP_NO_EXPORT	(1<<7)	/**< routing not allowed */

/** port type */
#define SND_SEQ_PORT_TYPE_SPECIFIC	(1<<0)	/**< hardware specific */
#define SND_SEQ_PORT_TYPE_MIDI_GENERIC	(1<<1)	/**< generic MIDI device */
#define SND_SEQ_PORT_TYPE_MIDI_GM	(1<<2)	/**< General MIDI compatible device */
#define SND_SEQ_PORT_TYPE_MIDI_GS	(1<<3)	/**< GS compatible device */
#define SND_SEQ_PORT_TYPE_MIDI_XG	(1<<4)	/**< XG compatible device */
#define SND_SEQ_PORT_TYPE_MIDI_MT32	(1<<5)	/**< MT-32 compatible device */
#define SND_SEQ_PORT_TYPE_SYNTH		(1<<10)	/**< Synth device */
#define SND_SEQ_PORT_TYPE_DIRECT_SAMPLE (1<<11)	/**< Sampling device (support sample download) */
#define SND_SEQ_PORT_TYPE_SAMPLE	(1<<12)	/**< Sampling device (sample can be downloaded at any time) */
#define SND_SEQ_PORT_TYPE_APPLICATION	(1<<20)	/**< application (sequencer/editor) */


size_t snd_seq_port_info_sizeof(void);
/** allocate a #snd_seq_port_info_t container on stack */
#define snd_seq_port_info_alloca(ptr) \
	SND_ALLOCA(snd_seq_port_info, ptr)
int snd_seq_port_info_malloc(snd_seq_port_info_t **ptr);
void snd_seq_port_info_free(snd_seq_port_info_t *ptr);
void snd_seq_port_info_copy(snd_seq_port_info_t *dst, const snd_seq_port_info_t *src);

int snd_seq_port_info_get_client(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_port(const snd_seq_port_info_t *info);
const snd_seq_addr_t *snd_seq_port_info_get_addr(const snd_seq_port_info_t *info);
const char *snd_seq_port_info_get_name(const snd_seq_port_info_t *info);
unsigned int snd_seq_port_info_get_capability(const snd_seq_port_info_t *info);
unsigned int snd_seq_port_info_get_type(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_midi_channels(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_midi_voices(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_synth_voices(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_read_use(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_write_use(const snd_seq_port_info_t *info);
int snd_seq_port_info_get_port_specified(const snd_seq_port_info_t *info);

void snd_seq_port_info_set_client(snd_seq_port_info_t *info, int client);
void snd_seq_port_info_set_port(snd_seq_port_info_t *info, int port);
void snd_seq_port_info_set_addr(snd_seq_port_info_t *info, const snd_seq_addr_t *addr);
void snd_seq_port_info_set_name(snd_seq_port_info_t *info, const char *name);
void snd_seq_port_info_set_capability(snd_seq_port_info_t *info, unsigned int capability);
void snd_seq_port_info_set_type(snd_seq_port_info_t *info, unsigned int type);
void snd_seq_port_info_set_midi_channels(snd_seq_port_info_t *info, int channels);
void snd_seq_port_info_set_midi_voices(snd_seq_port_info_t *info, int voices);
void snd_seq_port_info_set_synth_voices(snd_seq_port_info_t *info, int voices);
void snd_seq_port_info_set_port_specified(snd_seq_port_info_t *info, int val);

int snd_seq_create_port(snd_seq_t *handle, snd_seq_port_info_t *info);
int snd_seq_delete_port(snd_seq_t *handle, int port);
int snd_seq_get_port_info(snd_seq_t *handle, int port, snd_seq_port_info_t *info);
int snd_seq_get_any_port_info(snd_seq_t *handle, int client, int port, snd_seq_port_info_t *info);
int snd_seq_set_port_info(snd_seq_t *handle, int port, snd_seq_port_info_t *info);
int snd_seq_query_next_port(snd_seq_t *handle, snd_seq_port_info_t *info);

/** \} */


/**
 *  \defgroup SeqSubscribe Sequencer Port Subscription
 *  Sequencer Port Subscription
 *  \ingroup Sequencer
 *  \{
 */

/** port subscription container */
typedef struct _snd_seq_port_subscribe snd_seq_port_subscribe_t;

size_t snd_seq_port_subscribe_sizeof(void);
/** allocate a #snd_seq_port_subscribe_t container on stack */
#define snd_seq_port_subscribe_alloca(ptr) \
	SND_ALLOCA(snd_seq_port_subscribe, ptr)
int snd_seq_port_subscribe_malloc(snd_seq_port_subscribe_t **ptr);
void snd_seq_port_subscribe_free(snd_seq_port_subscribe_t *ptr);
void snd_seq_port_subscribe_copy(snd_seq_port_subscribe_t *dst, const snd_seq_port_subscribe_t *src);

const snd_seq_addr_t *snd_seq_port_subscribe_get_sender(const snd_seq_port_subscribe_t *info);
const snd_seq_addr_t *snd_seq_port_subscribe_get_dest(const snd_seq_port_subscribe_t *info);
int snd_seq_port_subscribe_get_queue(const snd_seq_port_subscribe_t *info);
int snd_seq_port_subscribe_get_exclusive(const snd_seq_port_subscribe_t *info);
int snd_seq_port_subscribe_get_time_update(const snd_seq_port_subscribe_t *info);
int snd_seq_port_subscribe_get_time_real(const snd_seq_port_subscribe_t *info);

void snd_seq_port_subscribe_set_sender(snd_seq_port_subscribe_t *info, const snd_seq_addr_t *addr);
void snd_seq_port_subscribe_set_dest(snd_seq_port_subscribe_t *info, const snd_seq_addr_t *addr);
void snd_seq_port_subscribe_set_queue(snd_seq_port_subscribe_t *info, int q);
void snd_seq_port_subscribe_set_exclusive(snd_seq_port_subscribe_t *info, int val);
void snd_seq_port_subscribe_set_time_update(snd_seq_port_subscribe_t *info, int val);
void snd_seq_port_subscribe_set_time_real(snd_seq_port_subscribe_t *info, int val);

int snd_seq_get_port_subscription(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);
int snd_seq_subscribe_port(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);
int snd_seq_unsubscribe_port(snd_seq_t *handle, snd_seq_port_subscribe_t *sub);

/*
 */

/** subscription query container */
typedef struct _snd_seq_query_subscribe snd_seq_query_subscribe_t;

/** type of query subscription */
typedef enum {
	SND_SEQ_QUERY_SUBS_READ,	/**< query read subscriptions */
	SND_SEQ_QUERY_SUBS_WRITE	/**< query write subscriptions */
} snd_seq_query_subs_type_t;

size_t snd_seq_query_subscribe_sizeof(void);
/** allocate a #snd_seq_query_subscribe_t container on stack */
#define snd_seq_query_subscribe_alloca(ptr) \
	SND_ALLOCA(snd_seq_query_subscribe, ptr)
int snd_seq_query_subscribe_malloc(snd_seq_query_subscribe_t **ptr);
void snd_seq_query_subscribe_free(snd_seq_query_subscribe_t *ptr);
void snd_seq_query_subscribe_copy(snd_seq_query_subscribe_t *dst, const snd_seq_query_subscribe_t *src);

int snd_seq_query_subscribe_get_client(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_port(const snd_seq_query_subscribe_t *info);
const snd_seq_addr_t *snd_seq_query_subscribe_get_root(const snd_seq_query_subscribe_t *info);
snd_seq_query_subs_type_t snd_seq_query_subscribe_get_type(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_index(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_num_subs(const snd_seq_query_subscribe_t *info);
const snd_seq_addr_t *snd_seq_query_subscribe_get_addr(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_queue(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_exclusive(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_time_update(const snd_seq_query_subscribe_t *info);
int snd_seq_query_subscribe_get_time_real(const snd_seq_query_subscribe_t *info);

void snd_seq_query_subscribe_set_client(snd_seq_query_subscribe_t *info, int client);
void snd_seq_query_subscribe_set_port(snd_seq_query_subscribe_t *info, int port);
void snd_seq_query_subscribe_set_root(snd_seq_query_subscribe_t *info, const snd_seq_addr_t *addr);
void snd_seq_query_subscribe_set_type(snd_seq_query_subscribe_t *info, snd_seq_query_subs_type_t type);
void snd_seq_query_subscribe_set_index(snd_seq_query_subscribe_t *info, int index);

int snd_seq_query_port_subscribers(snd_seq_t *seq, snd_seq_query_subscribe_t * subs);

/** \} */


/**
 *  \defgroup SeqQueue Sequencer Queue Interface
 *  Sequencer Queue Interface
 *  \ingroup Sequencer
 *  \{
 */

/** queue information container */
typedef struct _snd_seq_queue_info snd_seq_queue_info_t;
/** queue status container */
typedef struct _snd_seq_queue_status snd_seq_queue_status_t;
/** queue tempo container */
typedef struct _snd_seq_queue_tempo snd_seq_queue_tempo_t;
/** queue timer information container */
typedef struct _snd_seq_queue_timer snd_seq_queue_timer_t;

/** special queue ids */
#define SND_SEQ_QUEUE_DIRECT		253	/**< direct dispatch */

size_t snd_seq_queue_info_sizeof(void);
/** allocate a #snd_seq_queue_info_t container on stack */
#define snd_seq_queue_info_alloca(ptr) \
	SND_ALLOCA(snd_seq_queue_info, ptr)
int snd_seq_queue_info_malloc(snd_seq_queue_info_t **ptr);
void snd_seq_queue_info_free(snd_seq_queue_info_t *ptr);
void snd_seq_queue_info_copy(snd_seq_queue_info_t *dst, const snd_seq_queue_info_t *src);

int snd_seq_queue_info_get_queue(const snd_seq_queue_info_t *info);
const char *snd_seq_queue_info_get_name(const snd_seq_queue_info_t *info);
int snd_seq_queue_info_get_owner(const snd_seq_queue_info_t *info);
int snd_seq_queue_info_get_locked(const snd_seq_queue_info_t *info);
unsigned int snd_seq_queue_info_get_flags(const snd_seq_queue_info_t *info);

void snd_seq_queue_info_set_name(snd_seq_queue_info_t *info, const char *name);
void snd_seq_queue_info_set_owner(snd_seq_queue_info_t *info, int owner);
void snd_seq_queue_info_set_locked(snd_seq_queue_info_t *info, int locked);
void snd_seq_queue_info_set_flags(snd_seq_queue_info_t *info, unsigned int flags);

int snd_seq_create_queue(snd_seq_t *seq, snd_seq_queue_info_t *info);
int snd_seq_alloc_named_queue(snd_seq_t *seq, const char *name);
int snd_seq_alloc_queue(snd_seq_t *handle);
int snd_seq_free_queue(snd_seq_t *handle, int q);
int snd_seq_get_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info);
int snd_seq_set_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info);
int snd_seq_query_named_queue(snd_seq_t *seq, const char *name);

int snd_seq_get_queue_usage(snd_seq_t *handle, int q);
int snd_seq_set_queue_usage(snd_seq_t *handle, int q, int used);

/*
 */
size_t snd_seq_queue_status_sizeof(void);
/** allocate a #snd_seq_queue_status_t container on stack */
#define snd_seq_queue_status_alloca(ptr) \
	SND_ALLOCA(snd_seq_queue_status, ptr)
int snd_seq_queue_status_malloc(snd_seq_queue_status_t **ptr);
void snd_seq_queue_status_free(snd_seq_queue_status_t *ptr);
void snd_seq_queue_status_copy(snd_seq_queue_status_t *dst, const snd_seq_queue_status_t *src);

int snd_seq_queue_status_get_queue(const snd_seq_queue_status_t *info);
int snd_seq_queue_status_get_events(const snd_seq_queue_status_t *info);
snd_seq_tick_time_t snd_seq_queue_status_get_tick_time(const snd_seq_queue_status_t *info);
const snd_seq_real_time_t *snd_seq_queue_status_get_real_time(const snd_seq_queue_status_t *info);
unsigned int snd_seq_queue_status_get_status(const snd_seq_queue_status_t *info);

int snd_seq_get_queue_status(snd_seq_t *handle, int q, snd_seq_queue_status_t *status);

/*
 */
size_t snd_seq_queue_tempo_sizeof(void);
/** allocate a #snd_seq_queue_tempo_t container on stack */
#define snd_seq_queue_tempo_alloca(ptr) \
	SND_ALLOCA(snd_seq_queue_tempo, ptr)
int snd_seq_queue_tempo_malloc(snd_seq_queue_tempo_t **ptr);
void snd_seq_queue_tempo_free(snd_seq_queue_tempo_t *ptr);
void snd_seq_queue_tempo_copy(snd_seq_queue_tempo_t *dst, const snd_seq_queue_tempo_t *src);

int snd_seq_queue_tempo_get_queue(const snd_seq_queue_tempo_t *info);
unsigned int snd_seq_queue_tempo_get_tempo(const snd_seq_queue_tempo_t *info);
int snd_seq_queue_tempo_get_ppq(const snd_seq_queue_tempo_t *info);
unsigned int snd_seq_queue_tempo_get_skew(const snd_seq_queue_tempo_t *info);
unsigned int snd_seq_queue_tempo_get_skew_base(const snd_seq_queue_tempo_t *info);
void snd_seq_queue_tempo_set_tempo(snd_seq_queue_tempo_t *info, unsigned int tempo);
void snd_seq_queue_tempo_set_ppq(snd_seq_queue_tempo_t *info, int ppq);
void snd_seq_queue_tempo_set_skew(snd_seq_queue_tempo_t *info, unsigned int skew);
void snd_seq_queue_tempo_set_skew_base(snd_seq_queue_tempo_t *info, unsigned int base);

int snd_seq_get_queue_tempo(snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo);
int snd_seq_set_queue_tempo(snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo);

/*
 */

/** sequencer timer sources */
typedef enum {
	SND_SEQ_TIMER_ALSA = 0,		/* ALSA timer */
	SND_SEQ_TIMER_MIDI_CLOCK = 1,	/* Midi Clock (CLOCK event) */
	SND_SEQ_TIMER_MIDI_TICK = 2,	/* Midi Timer Tick (TICK event */
} snd_seq_queue_timer_type_t;

size_t snd_seq_queue_timer_sizeof(void);
/** allocate a #snd_seq_queue_timer_t container on stack */
#define snd_seq_queue_timer_alloca(ptr) \
	SND_ALLOCA(snd_seq_queue_timer, ptr)
int snd_seq_queue_timer_malloc(snd_seq_queue_timer_t **ptr);
void snd_seq_queue_timer_free(snd_seq_queue_timer_t *ptr);
void snd_seq_queue_timer_copy(snd_seq_queue_timer_t *dst, const snd_seq_queue_timer_t *src);

int snd_seq_queue_timer_get_queue(const snd_seq_queue_timer_t *info);
snd_seq_queue_timer_type_t snd_seq_queue_timer_get_type(const snd_seq_queue_timer_t *info);
const snd_timer_id_t *snd_seq_queue_timer_get_id(const snd_seq_queue_timer_t *info);
unsigned int snd_seq_queue_timer_get_resolution(const snd_seq_queue_timer_t *info);

void snd_seq_queue_timer_set_type(snd_seq_queue_timer_t *info, snd_seq_queue_timer_type_t type);
void snd_seq_queue_timer_set_id(snd_seq_queue_timer_t *info, const snd_timer_id_t *id);
void snd_seq_queue_timer_set_resolution(snd_seq_queue_timer_t *info, unsigned int resolution);

int snd_seq_get_queue_timer(snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer);
int snd_seq_set_queue_timer(snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer);

/** \} */

/**
 *  \defgroup SeqEvent Sequencer Event API
 *  Sequencer Event API
 *  \ingroup Sequencer
 *  \{
 */

snd_seq_event_t *snd_seq_create_event(void);
int snd_seq_free_event(snd_seq_event_t *ev);
ssize_t snd_seq_event_length(snd_seq_event_t *ev);
int snd_seq_event_output(snd_seq_t *handle, snd_seq_event_t *ev);
int snd_seq_event_output_buffer(snd_seq_t *handle, snd_seq_event_t *ev);
int snd_seq_event_output_direct(snd_seq_t *handle, snd_seq_event_t *ev);
int snd_seq_event_input(snd_seq_t *handle, snd_seq_event_t **ev);
int snd_seq_event_input_pending(snd_seq_t *seq, int fetch_sequencer);
int snd_seq_drain_output(snd_seq_t *handle);
int snd_seq_event_output_pending(snd_seq_t *seq);
int snd_seq_extract_output(snd_seq_t *handle, snd_seq_event_t **ev);
int snd_seq_drop_output(snd_seq_t *handle);
int snd_seq_drop_output_buffer(snd_seq_t *handle);
int snd_seq_drop_input(snd_seq_t *handle);
int snd_seq_drop_input_buffer(snd_seq_t *handle);

/** event removal conditionals */
typedef struct _snd_seq_remove_events snd_seq_remove_events_t;

/** Remove conditional flags */
#define SND_SEQ_REMOVE_INPUT		(1<<0)	/**< Flush input queues */
#define SND_SEQ_REMOVE_OUTPUT		(1<<1)	/**< Flush output queues */
#define SND_SEQ_REMOVE_DEST		(1<<2)	/**< Restrict by destination q:client:port */
#define SND_SEQ_REMOVE_DEST_CHANNEL	(1<<3)	/**< Restrict by channel */
#define SND_SEQ_REMOVE_TIME_BEFORE	(1<<4)	/**< Restrict to before time */
#define SND_SEQ_REMOVE_TIME_AFTER	(1<<5)	/**< Restrict to time or after */
#define SND_SEQ_REMOVE_TIME_TICK	(1<<6)	/**< Time is in ticks */
#define SND_SEQ_REMOVE_EVENT_TYPE	(1<<7)	/**< Restrict to event type */
#define SND_SEQ_REMOVE_IGNORE_OFF 	(1<<8)	/**< Do not flush off events */
#define SND_SEQ_REMOVE_TAG_MATCH 	(1<<9)	/**< Restrict to events with given tag */

size_t snd_seq_remove_events_sizeof(void);
/** allocate a #snd_seq_remove_events_t container on stack */
#define snd_seq_remove_events_alloca(ptr) \
	SND_ALLOCA(snd_seq_remove_events, ptr)
int snd_seq_remove_events_malloc(snd_seq_remove_events_t **ptr);
void snd_seq_remove_events_free(snd_seq_remove_events_t *ptr);
void snd_seq_remove_events_copy(snd_seq_remove_events_t *dst, const snd_seq_remove_events_t *src);

unsigned int snd_seq_remove_events_get_condition(const snd_seq_remove_events_t *info);
int snd_seq_remove_events_get_queue(const snd_seq_remove_events_t *info);
const snd_seq_timestamp_t *snd_seq_remove_events_get_time(const snd_seq_remove_events_t *info);
const snd_seq_addr_t *snd_seq_remove_events_get_dest(const snd_seq_remove_events_t *info);
int snd_seq_remove_events_get_channel(const snd_seq_remove_events_t *info);
int snd_seq_remove_events_get_event_type(const snd_seq_remove_events_t *info);
int snd_seq_remove_events_get_tag(const snd_seq_remove_events_t *info);

void snd_seq_remove_events_set_condition(snd_seq_remove_events_t *info, unsigned int flags);
void snd_seq_remove_events_set_queue(snd_seq_remove_events_t *info, int queue);
void snd_seq_remove_events_set_time(snd_seq_remove_events_t *info, const snd_seq_timestamp_t *time);
void snd_seq_remove_events_set_dest(snd_seq_remove_events_t *info, const snd_seq_addr_t *addr);
void snd_seq_remove_events_set_channel(snd_seq_remove_events_t *info, int channel);
void snd_seq_remove_events_set_event_type(snd_seq_remove_events_t *info, int type);
void snd_seq_remove_events_set_tag(snd_seq_remove_events_t *info, int tag);

int snd_seq_remove_events(snd_seq_t *handle, snd_seq_remove_events_t *info);

/** \} */

/**
 *  \defgroup SeqMisc Sequencer Miscellaneous
 *  Sequencer Mescellaneous
 *  \ingroup Sequencer
 *  \{
 */

void snd_seq_set_bit(int nr, void *array);
int snd_seq_change_bit(int nr, void *array);
int snd_seq_get_bit(int nr, void *array);

/** \} */


/**
 *  \defgroup SeqEvType Sequencer Event Type Checks
 *  Sequencer Event Type Checks
 *  \ingroup Sequencer
 *  \{
 */

/* event type macros */
enum {
	SND_SEQ_EVFLG_RESULT,
	SND_SEQ_EVFLG_NOTE,
	SND_SEQ_EVFLG_CONTROL,
	SND_SEQ_EVFLG_QUEUE,
	SND_SEQ_EVFLG_SYSTEM,
	SND_SEQ_EVFLG_MESSAGE,
	SND_SEQ_EVFLG_CONNECTION,
	SND_SEQ_EVFLG_SAMPLE,
	SND_SEQ_EVFLG_USERS,
	SND_SEQ_EVFLG_INSTR,
	SND_SEQ_EVFLG_QUOTE,
	SND_SEQ_EVFLG_NONE,
	SND_SEQ_EVFLG_RAW,
	SND_SEQ_EVFLG_FIXED,
	SND_SEQ_EVFLG_VARIABLE,
	SND_SEQ_EVFLG_VARUSR,
	SND_SEQ_EVFLG_IPC
};

enum {
	SND_SEQ_EVFLG_NOTE_ONEARG,
	SND_SEQ_EVFLG_NOTE_TWOARG
};

enum {
	SND_SEQ_EVFLG_QUEUE_NOARG,
	SND_SEQ_EVFLG_QUEUE_TICK,
	SND_SEQ_EVFLG_QUEUE_TIME,
	SND_SEQ_EVFLG_QUEUE_VALUE
};

/**
 * Exported event type table
 *
 * This table is referred by snd_seq_ev_is_xxx.
 */
extern const unsigned int snd_seq_event_types[];

#define _SND_SEQ_TYPE(x)	(1<<(x))	/**< master type - 24bit */
#define _SND_SEQ_TYPE_OPT(x)	((x)<<24)	/**< optional type - 8bit */

/** check the event type */
#define snd_seq_type_check(ev,x) (snd_seq_event_types[(ev)->type] & _SND_SEQ_TYPE(x))

/** event type check: result events */
#define snd_seq_ev_is_result_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_RESULT)
/** event type check: note events */
#define snd_seq_ev_is_note_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_NOTE)
/** event type check: control events */
#define snd_seq_ev_is_control_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_CONTROL)
/** event type check: channel specific events */
#define snd_seq_ev_is_channel_type(ev) \
	(snd_seq_event_types[(ev)->type] & (_SND_SEQ_TYPE(SND_SEQ_EVFLG_NOTE) | _SND_SEQ_TYPE(SND_SEQ_EVFLG_CONTROL)))

/** event type check: queue control events */
#define snd_seq_ev_is_queue_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_QUEUE)
/** event type check: system status messages */
#define snd_seq_ev_is_message_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_MESSAGE)
/** event type check: system status messages */
#define snd_seq_ev_is_subscribe_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_CONNECTION)
/** event type check: sample messages */
#define snd_seq_ev_is_sample_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_SAMPLE)
/** event type check: user-defined messages */
#define snd_seq_ev_is_user_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_USERS)
/** event type check: instrument layer events */
#define snd_seq_ev_is_instr_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_INSTR)
/** event type check: fixed length events */
#define snd_seq_ev_is_fixed_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_FIXED)
/** event type check: variable length events */
#define snd_seq_ev_is_variable_type(ev)	\
	snd_seq_type_check(ev, SND_SEQ_EVFLG_VARIABLE)
/** event type check: user pointer events */
#define snd_seq_ev_is_varusr_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_VARUSR)
/** event type check: ipc events */
#define snd_seq_ev_is_varipc_type(ev) \
	snd_seq_type_check(ev, SND_SEQ_EVFLG_IPC)
/** event type check: reserved for kernel */
#define snd_seq_ev_is_reserved(ev) \
	(! snd_seq_event_types[(ev)->type])

/**
 * macros to check event flags
 */
/** prior events */
#define snd_seq_ev_is_prior(ev)	\
	(((ev)->flags & SND_SEQ_PRIORITY_MASK) == SND_SEQ_PRIORITY_HIGH)

/** get the data length type */
#define snd_seq_ev_length_type(ev) \
	((ev)->flags & SND_SEQ_EVENT_LENGTH_MASK)
/** fixed length events */
#define snd_seq_ev_is_fixed(ev)	\
	(snd_seq_ev_length_type(ev) == SND_SEQ_EVENT_LENGTH_FIXED)
/** variable length events */
#define snd_seq_ev_is_variable(ev) \
	(snd_seq_ev_length_type(ev) == SND_SEQ_EVENT_LENGTH_VARIABLE)
/** variable length on user-space */
#define snd_seq_ev_is_varusr(ev) \
	(snd_seq_ev_length_type(ev) == SND_SEQ_EVENT_LENGTH_VARUSR)
/** variable length on IPC shm */
#define snd_seq_ev_is_varipc(ev) \
	(snd_seq_ev_length_type(ev) == SND_SEQ_EVENT_LENGTH_VARIPC)

/** time-stamp type */
#define snd_seq_ev_timestamp_type(ev) \
	((ev)->flags & SND_SEQ_TIME_STAMP_MASK)
/** event is in tick time */
#define snd_seq_ev_is_tick(ev) \
	(snd_seq_ev_timestamp_type(ev) == SND_SEQ_TIME_STAMP_TICK)
/** event is in real-time */
#define snd_seq_ev_is_real(ev) \
	(snd_seq_ev_timestamp_type(ev) == SND_SEQ_TIME_STAMP_REAL)

/** time-mode type */
#define snd_seq_ev_timemode_type(ev) \
	((ev)->flags & SND_SEQ_TIME_MODE_MASK)
/** scheduled in absolute time */
#define snd_seq_ev_is_abstime(ev) \
	(snd_seq_ev_timemode_type(ev) == SND_SEQ_TIME_MODE_ABS)
/** scheduled in relative time */
#define snd_seq_ev_is_reltime(ev) \
	(snd_seq_ev_timemode_type(ev) == SND_SEQ_TIME_MODE_REL)

/** direct dispatched events */
#define snd_seq_ev_is_direct(ev) \
	((ev)->queue == SND_SEQ_QUEUE_DIRECT)

/** \} */

#ifdef __cplusplus
}
#endif

#endif /* __ALSA_SEQ_H */