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Sequencer Queue Interface
[MIDI Sequencer]


Defines

#define SND_SEQ_QUEUE_DIRECT   253 /**< direct dispatch */
#define snd_seq_queue_info_alloca(ptr)   SND_ALLOCA(snd_seq_queue_info, ptr)
#define snd_seq_queue_status_alloca(ptr)   SND_ALLOCA(snd_seq_queue_status, ptr)
#define snd_seq_queue_tempo_alloca(ptr)   SND_ALLOCA(snd_seq_queue_tempo, ptr)
#define snd_seq_queue_timer_alloca(ptr)   SND_ALLOCA(snd_seq_queue_timer, ptr)

Typedefs

typedef _snd_seq_queue_info snd_seq_queue_info_t
typedef _snd_seq_queue_status snd_seq_queue_status_t
typedef _snd_seq_queue_tempo snd_seq_queue_tempo_t
typedef _snd_seq_queue_timer snd_seq_queue_timer_t

Enumerations

enum  snd_seq_queue_timer_type_t { SND_SEQ_TIMER_ALSA = 0, SND_SEQ_TIMER_MIDI_CLOCK = 1, SND_SEQ_TIMER_MIDI_TICK = 2 }

Functions

size_t snd_seq_queue_info_sizeof (void)
 get size of snd_seq_queue_info_t

int snd_seq_queue_info_malloc (snd_seq_queue_info_t **ptr)
 allocate an empty snd_seq_queue_info_t using standard malloc

void snd_seq_queue_info_free (snd_seq_queue_info_t *ptr)
 frees a previously allocated snd_seq_queue_info_t

void snd_seq_queue_info_copy (snd_seq_queue_info_t *dst, const snd_seq_queue_info_t *src)
 copy one snd_seq_queue_info_t to another

int snd_seq_queue_info_get_queue (const snd_seq_queue_info_t *info)
 Get the queue id of a queue_info container.

const char * snd_seq_queue_info_get_name (const snd_seq_queue_info_t *info)
 Get the name of a queue_info container.

int snd_seq_queue_info_get_owner (const snd_seq_queue_info_t *info)
 Get the owner client id of a queue_info container.

int snd_seq_queue_info_get_locked (const snd_seq_queue_info_t *info)
 Get the lock status of a queue_info container.

unsigned int snd_seq_queue_info_get_flags (const snd_seq_queue_info_t *info)
 Get the conditional bit flags of a queue_info container.

void snd_seq_queue_info_set_name (snd_seq_queue_info_t *info, const char *name)
 Set the name of a queue_info container.

void snd_seq_queue_info_set_owner (snd_seq_queue_info_t *info, int owner)
 Set the owner client id of a queue_info container.

void snd_seq_queue_info_set_locked (snd_seq_queue_info_t *info, int locked)
 Set the lock status of a queue_info container.

void snd_seq_queue_info_set_flags (snd_seq_queue_info_t *info, unsigned int flags)
 Set the conditional bit flags of a queue_info container.

int snd_seq_create_queue (snd_seq_t *seq, snd_seq_queue_info_t *info)
 create a queue

int snd_seq_alloc_named_queue (snd_seq_t *seq, const char *name)
 allocate a queue with the specified name

int snd_seq_alloc_queue (snd_seq_t *handle)
 allocate a queue

int snd_seq_free_queue (snd_seq_t *handle, int q)
 delete the specified queue

int snd_seq_get_queue_info (snd_seq_t *seq, int q, snd_seq_queue_info_t *info)
 obtain queue attributes

int snd_seq_set_queue_info (snd_seq_t *seq, int q, snd_seq_queue_info_t *info)
 change the queue attributes

int snd_seq_query_named_queue (snd_seq_t *seq, const char *name)
 query the matching queue with the specified name

int snd_seq_get_queue_usage (snd_seq_t *handle, int q)
 Get the queue usage flag to the client.

int snd_seq_set_queue_usage (snd_seq_t *handle, int q, int used)
 Set the queue usage flag to the client.

size_t snd_seq_queue_status_sizeof (void)
 get size of snd_seq_queue_status_t

int snd_seq_queue_status_malloc (snd_seq_queue_status_t **ptr)
 allocate an empty snd_seq_queue_status_t using standard malloc

void snd_seq_queue_status_free (snd_seq_queue_status_t *ptr)
 frees a previously allocated snd_seq_queue_status_t

void snd_seq_queue_status_copy (snd_seq_queue_status_t *dst, const snd_seq_queue_status_t *src)
 copy one snd_seq_queue_status_t to another

int snd_seq_queue_status_get_queue (const snd_seq_queue_status_t *info)
 Get the queue id of a queue_status container.

int snd_seq_queue_status_get_events (const snd_seq_queue_status_t *info)
 Get the number of events of a queue_status container.

snd_seq_tick_time_t snd_seq_queue_status_get_tick_time (const snd_seq_queue_status_t *info)
 Get the tick time of a queue_status container.

const snd_seq_real_time_tsnd_seq_queue_status_get_real_time (const snd_seq_queue_status_t *info)
 Get the real time of a queue_status container.

unsigned int snd_seq_queue_status_get_status (const snd_seq_queue_status_t *info)
 Get the running status bits of a queue_status container.

int snd_seq_get_queue_status (snd_seq_t *handle, int q, snd_seq_queue_status_t *status)
 obtain the running state of the queue

size_t snd_seq_queue_tempo_sizeof (void)
 get size of snd_seq_queue_tempo_t

int snd_seq_queue_tempo_malloc (snd_seq_queue_tempo_t **ptr)
 allocate an empty snd_seq_queue_tempo_t using standard malloc

void snd_seq_queue_tempo_free (snd_seq_queue_tempo_t *ptr)
 frees a previously allocated snd_seq_queue_tempo_t

void snd_seq_queue_tempo_copy (snd_seq_queue_tempo_t *dst, const snd_seq_queue_tempo_t *src)
 copy one snd_seq_queue_tempo_t to another

int snd_seq_queue_tempo_get_queue (const snd_seq_queue_tempo_t *info)
 Get the queue id of a queue_status container.

unsigned int snd_seq_queue_tempo_get_tempo (const snd_seq_queue_tempo_t *info)
 Get the tempo of a queue_status container.

int snd_seq_queue_tempo_get_ppq (const snd_seq_queue_tempo_t *info)
 Get the ppq of a queue_status container.

unsigned int snd_seq_queue_tempo_get_skew (const snd_seq_queue_tempo_t *info)
 Get the timer skew value of a queue_status container.

unsigned int snd_seq_queue_tempo_get_skew_base (const snd_seq_queue_tempo_t *info)
 Get the timer skew base value of a queue_status container.

void snd_seq_queue_tempo_set_tempo (snd_seq_queue_tempo_t *info, unsigned int tempo)
 Set the tempo of a queue_status container.

void snd_seq_queue_tempo_set_ppq (snd_seq_queue_tempo_t *info, int ppq)
 Set the ppq of a queue_status container.

void snd_seq_queue_tempo_set_skew (snd_seq_queue_tempo_t *info, unsigned int skew)
 Set the timer skew value of a queue_status container.

void snd_seq_queue_tempo_set_skew_base (snd_seq_queue_tempo_t *info, unsigned int base)
 Set the timer skew base value of a queue_status container.

int snd_seq_get_queue_tempo (snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo)
 obtain the current tempo of the queue

int snd_seq_set_queue_tempo (snd_seq_t *handle, int q, snd_seq_queue_tempo_t *tempo)
 set the tempo of the queue

size_t snd_seq_queue_timer_sizeof (void)
 get size of snd_seq_queue_timer_t

int snd_seq_queue_timer_malloc (snd_seq_queue_timer_t **ptr)
 allocate an empty snd_seq_queue_timer_t using standard malloc

void snd_seq_queue_timer_free (snd_seq_queue_timer_t *ptr)
 frees a previously allocated snd_seq_queue_timer_t

void snd_seq_queue_timer_copy (snd_seq_queue_timer_t *dst, const snd_seq_queue_timer_t *src)
 copy one snd_seq_queue_timer_t to another

int snd_seq_queue_timer_get_queue (const snd_seq_queue_timer_t *info)
 Get the queue id of a queue_timer container.

snd_seq_queue_timer_type_t snd_seq_queue_timer_get_type (const snd_seq_queue_timer_t *info)
 Get the timer type of a queue_timer container.

const snd_timer_id_tsnd_seq_queue_timer_get_id (const snd_seq_queue_timer_t *info)
 Get the timer id of a queue_timer container.

unsigned int snd_seq_queue_timer_get_resolution (const snd_seq_queue_timer_t *info)
 Get the timer resolution of a queue_timer container.

void snd_seq_queue_timer_set_type (snd_seq_queue_timer_t *info, snd_seq_queue_timer_type_t type)
 Set the timer type of a queue_timer container.

void snd_seq_queue_timer_set_id (snd_seq_queue_timer_t *info, const snd_timer_id_t *id)
 Set the timer id of a queue_timer container.

void snd_seq_queue_timer_set_resolution (snd_seq_queue_timer_t *info, unsigned int resolution)
 Set the timer resolution of a queue_timer container.

int snd_seq_get_queue_timer (snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer)
 obtain the queue timer information

int snd_seq_set_queue_timer (snd_seq_t *handle, int q, snd_seq_queue_timer_t *timer)
 set the queue timer information


Detailed Description

Sequencer Queue Interface

Define Documentation

#define SND_SEQ_QUEUE_DIRECT   253 /**< direct dispatch */
 

direct dispatch

#define snd_seq_queue_info_alloca ptr   )     SND_ALLOCA(snd_seq_queue_info, ptr)
 

allocate a snd_seq_queue_info_t container on stack

#define snd_seq_queue_status_alloca ptr   )     SND_ALLOCA(snd_seq_queue_status, ptr)
 

allocate a snd_seq_queue_status_t container on stack

#define snd_seq_queue_tempo_alloca ptr   )     SND_ALLOCA(snd_seq_queue_tempo, ptr)
 

allocate a snd_seq_queue_tempo_t container on stack

#define snd_seq_queue_timer_alloca ptr   )     SND_ALLOCA(snd_seq_queue_timer, ptr)
 

allocate a snd_seq_queue_timer_t container on stack


Typedef Documentation

typedef struct _snd_seq_queue_info snd_seq_queue_info_t
 

queue information container

typedef struct _snd_seq_queue_status snd_seq_queue_status_t
 

queue status container

typedef struct _snd_seq_queue_tempo snd_seq_queue_tempo_t
 

queue tempo container

typedef struct _snd_seq_queue_timer snd_seq_queue_timer_t
 

queue timer information container


Enumeration Type Documentation

enum snd_seq_queue_timer_type_t
 

sequencer timer sources


Function Documentation

int snd_seq_alloc_named_queue snd_seq_t seq,
const char *  name
 

allocate a queue with the specified name

Parameters:
seq sequencer handle
name the name of the new queue
Returns:
the queue id (zero or positive) on success otherwise a negative error code
See also:
snd_seq_alloc_queue()

int snd_seq_alloc_queue snd_seq_t seq  ) 
 

allocate a queue

Parameters:
seq sequencer handle
Returns:
the queue id (zero or positive) on success otherwise a negative error code
See also:
snd_seq_alloc_named_queue(), snd_seq_create_queue(), snd_seq_free_queue(), snd_seq_get_queue_info()

int snd_seq_create_queue snd_seq_t seq,
snd_seq_queue_info_t info
 

create a queue

Parameters:
seq sequencer handle
info queue information to initialize
Returns:
the queue id (zero or positive) on success otherwise a negative error code
See also:
snd_seq_alloc_queue()

int snd_seq_free_queue snd_seq_t seq,
int  q
 

delete the specified queue

Parameters:
seq sequencer handle
q queue id to delete
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_alloc_queue()

int snd_seq_get_queue_info snd_seq_t seq,
int  q,
snd_seq_queue_info_t info
 

obtain queue attributes

Parameters:
seq sequencer handle
q queue id to query
info information returned
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_alloc_queue(), snd_seq_set_queue_info(), snd_seq_query_named_queue()

int snd_seq_get_queue_status snd_seq_t seq,
int  q,
snd_seq_queue_status_t status
 

obtain the running state of the queue

Parameters:
seq sequencer handle
q queue id to query
status pointer to store the current status
Returns:
0 on success otherwise a negative error code
Obtains the running state of the specified queue q.

int snd_seq_get_queue_tempo snd_seq_t seq,
int  q,
snd_seq_queue_tempo_t tempo
 

obtain the current tempo of the queue

Parameters:
seq sequencer handle
q queue id to be queried
tempo pointer to store the current tempo
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_set_queue_tempo()

int snd_seq_get_queue_timer snd_seq_t seq,
int  q,
snd_seq_queue_timer_t timer
 

obtain the queue timer information

Parameters:
seq sequencer handle
q queue id to query
timer pointer to store the timer information
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_set_queue_timer()

int snd_seq_get_queue_usage snd_seq_t seq,
int  q
 

Get the queue usage flag to the client.

Parameters:
seq sequencer handle
q queue id
client client id
Returns:
1 = client is allowed to access the queue, 0 = not allowed, otherwise a negative error code
See also:
snd_seq_get_queue_info(), snd_seq_set_queue_usage()

int snd_seq_query_named_queue snd_seq_t seq,
const char *  name
 

query the matching queue with the specified name

Parameters:
seq sequencer handle
name the name string to query
Returns:
the queue id if found or negative error code
Searches the matching queue with the specified name string.

See also:
snd_seq_get_queue_info()

void snd_seq_queue_info_copy snd_seq_queue_info_t dst,
const snd_seq_queue_info_t src
 

copy one snd_seq_queue_info_t to another

Parameters:
dst pointer to destination
src pointer to source

void snd_seq_queue_info_free snd_seq_queue_info_t obj  ) 
 

frees a previously allocated snd_seq_queue_info_t

Parameters:
pointer to object to free

unsigned int snd_seq_queue_info_get_flags const snd_seq_queue_info_t info  ) 
 

Get the conditional bit flags of a queue_info container.

Parameters:
info queue_info container
Returns:
conditional bit flags
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_set_flags()

int snd_seq_queue_info_get_locked const snd_seq_queue_info_t info  ) 
 

Get the lock status of a queue_info container.

Parameters:
info queue_info container
Returns:
lock status --- non-zero = locked
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_set_locked()

const char* snd_seq_queue_info_get_name const snd_seq_queue_info_t info  ) 
 

Get the name of a queue_info container.

Parameters:
info queue_info container
Returns:
name string
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_set_name()

int snd_seq_queue_info_get_owner const snd_seq_queue_info_t info  ) 
 

Get the owner client id of a queue_info container.

Parameters:
info queue_info container
Returns:
owner client id
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_set_owner()

int snd_seq_queue_info_get_queue const snd_seq_queue_info_t info  ) 
 

Get the queue id of a queue_info container.

Parameters:
info queue_info container
Returns:
queue id
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_set_queue()

int snd_seq_queue_info_malloc snd_seq_queue_info_t **  ptr  ) 
 

allocate an empty snd_seq_queue_info_t using standard malloc

Parameters:
ptr returned pointer
Returns:
0 on success otherwise negative error code

void snd_seq_queue_info_set_flags snd_seq_queue_info_t info,
unsigned int  flags
 

Set the conditional bit flags of a queue_info container.

Parameters:
info queue_info container
flags conditional bit flags
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_get_flags()

void snd_seq_queue_info_set_locked snd_seq_queue_info_t info,
int  locked
 

Set the lock status of a queue_info container.

Parameters:
info queue_info container
locked lock status
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_get_locked()

void snd_seq_queue_info_set_name snd_seq_queue_info_t info,
const char *  name
 

Set the name of a queue_info container.

Parameters:
info queue_info container
name name string
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_get_name()

void snd_seq_queue_info_set_owner snd_seq_queue_info_t info,
int  owner
 

Set the owner client id of a queue_info container.

Parameters:
info queue_info container
owner client id
See also:
snd_seq_get_queue_info(), snd_seq_queue_info_get_owner()

size_t snd_seq_queue_info_sizeof void   ) 
 

get size of snd_seq_queue_info_t

Returns:
size in bytes

void snd_seq_queue_status_copy snd_seq_queue_status_t dst,
const snd_seq_queue_status_t src
 

copy one snd_seq_queue_status_t to another

Parameters:
dst pointer to destination
src pointer to source

void snd_seq_queue_status_free snd_seq_queue_status_t obj  ) 
 

frees a previously allocated snd_seq_queue_status_t

Parameters:
pointer to object to free

int snd_seq_queue_status_get_events const snd_seq_queue_status_t info  ) 
 

Get the number of events of a queue_status container.

Parameters:
info queue_status container
Returns:
number of events
See also:
snd_seq_get_queue_status()

int snd_seq_queue_status_get_queue const snd_seq_queue_status_t info  ) 
 

Get the queue id of a queue_status container.

Parameters:
info queue_status container
Returns:
queue id
See also:
snd_seq_get_queue_status()

const snd_seq_real_time_t* snd_seq_queue_status_get_real_time const snd_seq_queue_status_t info  ) 
 

Get the real time of a queue_status container.

Parameters:
info queue_status container
time real time
See also:
snd_seq_get_queue_status()

unsigned int snd_seq_queue_status_get_status const snd_seq_queue_status_t info  ) 
 

Get the running status bits of a queue_status container.

Parameters:
info queue_status container
Returns:
running status bits
See also:
snd_seq_get_queue_status()

snd_seq_tick_time_t snd_seq_queue_status_get_tick_time const snd_seq_queue_status_t info  ) 
 

Get the tick time of a queue_status container.

Parameters:
info queue_status container
Returns:
tick time
See also:
snd_seq_get_queue_status()

int snd_seq_queue_status_malloc snd_seq_queue_status_t **  ptr  ) 
 

allocate an empty snd_seq_queue_status_t using standard malloc

Parameters:
ptr returned pointer
Returns:
0 on success otherwise negative error code

size_t snd_seq_queue_status_sizeof void   ) 
 

get size of snd_seq_queue_status_t

Returns:
size in bytes

void snd_seq_queue_tempo_copy snd_seq_queue_tempo_t dst,
const snd_seq_queue_tempo_t src
 

copy one snd_seq_queue_tempo_t to another

Parameters:
dst pointer to destination
src pointer to source

void snd_seq_queue_tempo_free snd_seq_queue_tempo_t obj  ) 
 

frees a previously allocated snd_seq_queue_tempo_t

Parameters:
pointer to object to free

int snd_seq_queue_tempo_get_ppq const snd_seq_queue_tempo_t info  ) 
 

Get the ppq of a queue_status container.

Parameters:
info queue_status container
Returns:
ppq value
See also:
snd_seq_get_queue_tempo()

int snd_seq_queue_tempo_get_queue const snd_seq_queue_tempo_t info  ) 
 

Get the queue id of a queue_status container.

Parameters:
info queue_status container
Returns:
queue id
See also:
snd_seq_get_queue_tempo()

unsigned int snd_seq_queue_tempo_get_skew const snd_seq_queue_tempo_t info  ) 
 

Get the timer skew value of a queue_status container.

Parameters:
info queue_status container
Returns:
timer skew value
See also:
snd_seq_get_queue_tempo()

unsigned int snd_seq_queue_tempo_get_skew_base const snd_seq_queue_tempo_t info  ) 
 

Get the timer skew base value of a queue_status container.

Parameters:
info queue_status container
Returns:
timer skew base value
See also:
snd_seq_get_queue_tempo()

unsigned int snd_seq_queue_tempo_get_tempo const snd_seq_queue_tempo_t info  ) 
 

Get the tempo of a queue_status container.

Parameters:
info queue_status container
Returns:
tempo value
See also:
snd_seq_get_queue_tempo()

int snd_seq_queue_tempo_malloc snd_seq_queue_tempo_t **  ptr  ) 
 

allocate an empty snd_seq_queue_tempo_t using standard malloc

Parameters:
ptr returned pointer
Returns:
0 on success otherwise negative error code

void snd_seq_queue_tempo_set_ppq snd_seq_queue_tempo_t info,
int  ppq
 

Set the ppq of a queue_status container.

Parameters:
info queue_status container
ppq ppq value
See also:
snd_seq_get_queue_tempo()

void snd_seq_queue_tempo_set_skew snd_seq_queue_tempo_t info,
unsigned int  skew
 

Set the timer skew value of a queue_status container.

Parameters:
info queue_status container
skew timer skew value
The skew of timer is calculated as skew / base. For example, to play with double speed, pass base * 2 as the skew value.

See also:
snd_seq_get_queue_tempo()

void snd_seq_queue_tempo_set_skew_base snd_seq_queue_tempo_t info,
unsigned int  base
 

Set the timer skew base value of a queue_status container.

Parameters:
info queue_status container
base timer skew base value
See also:
snd_seq_get_queue_tempo()

void snd_seq_queue_tempo_set_tempo snd_seq_queue_tempo_t info,
unsigned int  tempo
 

Set the tempo of a queue_status container.

Parameters:
info queue_status container
tempo tempo value
See also:
snd_seq_get_queue_tempo()

size_t snd_seq_queue_tempo_sizeof void   ) 
 

get size of snd_seq_queue_tempo_t

Returns:
size in bytes

void snd_seq_queue_timer_copy snd_seq_queue_timer_t dst,
const snd_seq_queue_timer_t src
 

copy one snd_seq_queue_timer_t to another

Parameters:
dst pointer to destination
src pointer to source

void snd_seq_queue_timer_free snd_seq_queue_timer_t obj  ) 
 

frees a previously allocated snd_seq_queue_timer_t

Parameters:
pointer to object to free

const snd_timer_id_t* snd_seq_queue_timer_get_id const snd_seq_queue_timer_t info  ) 
 

Get the timer id of a queue_timer container.

Parameters:
info queue_timer container
Returns:
timer id pointer
See also:
snd_seq_get_queue_timer()

int snd_seq_queue_timer_get_queue const snd_seq_queue_timer_t info  ) 
 

Get the queue id of a queue_timer container.

Parameters:
info queue_timer container
Returns:
queue id
See also:
snd_seq_get_queue_timer()

unsigned int snd_seq_queue_timer_get_resolution const snd_seq_queue_timer_t info  ) 
 

Get the timer resolution of a queue_timer container.

Parameters:
info queue_timer container
Returns:
timer resolution
See also:
snd_seq_get_queue_timer()

snd_seq_queue_timer_type_t snd_seq_queue_timer_get_type const snd_seq_queue_timer_t info  ) 
 

Get the timer type of a queue_timer container.

Parameters:
info queue_timer container
Returns:
timer type
See also:
snd_seq_get_queue_timer()

int snd_seq_queue_timer_malloc snd_seq_queue_timer_t **  ptr  ) 
 

allocate an empty snd_seq_queue_timer_t using standard malloc

Parameters:
ptr returned pointer
Returns:
0 on success otherwise negative error code

void snd_seq_queue_timer_set_id snd_seq_queue_timer_t info,
const snd_timer_id_t id
 

Set the timer id of a queue_timer container.

Parameters:
info queue_timer container
id timer id pointer
See also:
snd_seq_get_queue_timer()

void snd_seq_queue_timer_set_resolution snd_seq_queue_timer_t info,
unsigned int  resolution
 

Set the timer resolution of a queue_timer container.

Parameters:
info queue_timer container
resolution timer resolution
See also:
snd_seq_get_queue_timer()

void snd_seq_queue_timer_set_type snd_seq_queue_timer_t info,
snd_seq_queue_timer_type_t  type
 

Set the timer type of a queue_timer container.

Parameters:
info queue_timer container
type timer type
See also:
snd_seq_get_queue_timer()

size_t snd_seq_queue_timer_sizeof void   ) 
 

get size of snd_seq_queue_timer_t

Returns:
size in bytes

int snd_seq_set_queue_info snd_seq_t seq,
int  q,
snd_seq_queue_info_t info
 

change the queue attributes

Parameters:
seq sequencer handle
q queue id to change
info information changed
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_get_queue_info()

int snd_seq_set_queue_tempo snd_seq_t seq,
int  q,
snd_seq_queue_tempo_t tempo
 

set the tempo of the queue

Parameters:
seq sequencer handle
q queue id to change the tempo
tempo tempo information
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_get_queue_tempo()

int snd_seq_set_queue_timer snd_seq_t seq,
int  q,
snd_seq_queue_timer_t timer
 

set the queue timer information

Parameters:
seq sequencer handle
q queue id to change the timer
timer timer information
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_get_queue_timer()

int snd_seq_set_queue_usage snd_seq_t seq,
int  q,
int  used
 

Set the queue usage flag to the client.

Parameters:
seq sequencer handle
q queue id
client client id
used non-zero if the client is allowed
Returns:
0 on success otherwise a negative error code
See also:
snd_seq_get_queue_info(), snd_seq_set_queue_usage()


Generated on Mon May 3 16:15:23 2004 for ALSA project - the C library reference by doxygen 1.3.6