seq.h

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/**
 * \file include/seq.h
 * \brief Application interface library for the ALSA driver
 * \author Jaroslav Kysela <[e-mail]>
 * \author Abramo Bagnara <[e-mail]>
 * \author Takashi Iwai <[e-mail]>
 * \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 Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#ifndef __ALSA_SEQ_H
#define __ALSA_SEQ_H

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  \defgroup Sequencer MIDI Sequencer
 *  MIDI Sequencer Interface.
 *  See \ref seq page for more details.
 *  \{
 */

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

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

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

/**
 * 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	0x0001	/**< non-blocking mode (flag to open 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 */

/*
 */
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	/**< system 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 */
/** Messages sent from/to this port have device-specific semantics. */
#define SND_SEQ_PORT_TYPE_SPECIFIC	(1<<0)
/** This port understands MIDI messages. */
#define SND_SEQ_PORT_TYPE_MIDI_GENERIC	(1<<1)
/** This port is compatible with the General MIDI specification. */
#define SND_SEQ_PORT_TYPE_MIDI_GM	(1<<2)
/** This port is compatible with the Roland GS standard. */
#define SND_SEQ_PORT_TYPE_MIDI_GS	(1<<3)
/** This port is compatible with the Yamaha XG specification. */
#define SND_SEQ_PORT_TYPE_MIDI_XG	(1<<4)
/** This port is compatible with the Roland MT-32. */
#define SND_SEQ_PORT_TYPE_MIDI_MT32	(1<<5)
/** This port is compatible with the General MIDI 2 specification. */
#define SND_SEQ_PORT_TYPE_MIDI_GM2	(1<<6)
/** This port understands SND_SEQ_EVENT_SAMPLE_xxx messages
    (these are not MIDI messages). */
#define SND_SEQ_PORT_TYPE_SYNTH		(1<<10)
/** Instruments can be downloaded to this port
    (with SND_SEQ_EVENT_INSTR_xxx messages sent directly). */