liblo  0.28
Data Structures | Macros | Enumerations | Functions
High-level OSC API

Data Structures

struct  lo_timetag
 A structure to store OSC TimeTag values. More...
 
union  lo_arg
 Union used to read values from incoming messages. More...
 

Macros

#define LO_TT_IMMEDIATE   ((lo_timetag){0U,1U})
 A timetag constant representing "now". More...
 

Enumerations

enum  lo_element_type { LO_ELEMENT_MESSAGE = 1, LO_ELEMENT_BUNDLE = 2 }
 An enumeration of bundle element types liblo can handle. More...
 
enum  lo_type {
  LO_INT32 = 'i', LO_FLOAT = 'f', LO_STRING = 's', LO_BLOB = 'b',
  LO_INT64 = 'h', LO_TIMETAG = 't', LO_DOUBLE = 'd', LO_SYMBOL = 'S',
  LO_CHAR = 'c', LO_MIDI = 'm', LO_TRUE = 'T', LO_FALSE = 'F',
  LO_NIL = 'N', LO_INFINITUM = 'I'
}
 An enumeration of the OSC types liblo can send and receive. More...
 

Functions

lo_address lo_address_new (const char *host, const char *port)
 Declare an OSC destination, given IP address and port number. Same as lo_address_new_with_proto(), but using UDP. More...
 
lo_address lo_address_new_with_proto (int proto, const char *host, const char *port)
 Declare an OSC destination, given IP address and port number, specifying protocol. More...
 
lo_address lo_address_new_from_url (const char *url)
 Create a lo_address object from an OSC URL. More...
 
void lo_address_free (lo_address t)
 Free the memory used by the lo_address object. More...
 
void lo_address_set_ttl (lo_address t, int ttl)
 Set the Time-to-Live value for a given target address. More...
 
int lo_address_get_ttl (lo_address t)
 Get the Time-to-Live value for a given target address. More...
 
int lo_send (lo_address targ, const char *path, const char *type,...)
 Send a OSC formatted message to the address specified. More...
 
int lo_send_from (lo_address targ, lo_server from, lo_timetag ts, const char *path, const char *type,...)
 Send a OSC formatted message to the address specified, from the same socket as the specified server. More...
 
int lo_send_timestamped (lo_address targ, lo_timetag ts, const char *path, const char *type,...)
 Send a OSC formatted message to the address specified, scheduled to be dispatch at some time in the future. More...
 
int lo_address_errno (lo_address a)
 Return the error number from the last failed lo_send() or lo_address_new() call. More...
 
const char * lo_address_errstr (lo_address a)
 Return the error string from the last failed lo_send() or lo_address_new() call. More...
 
lo_blob lo_blob_new (int32_t size, const void *data)
 Create a new OSC blob type. More...
 
void lo_blob_free (lo_blob b)
 Free the memory taken by a blob. More...
 
uint32_t lo_blob_datasize (lo_blob b)
 Return the amount of valid data in a lo_blob object. More...
 
void * lo_blob_dataptr (lo_blob b)
 Return a pointer to the start of the blob data to allow contents to be changed. More...
 
void lo_version (char *verstr, int verstr_size, int *major, int *minor, char *extra, int extra_size, int *lt_major, int *lt_minor, int *lt_bug)
 Get information on the version of liblo current in use. More...
 

Detailed Description

Defines the high-level API functions necessary to implement OSC support. Should be adequate for most applications, but if you require lower level control you can use the functions defined in lo_lowlevel.h

Macro Definition Documentation

#define LO_TT_IMMEDIATE   ((lo_timetag){0U,1U})

A timetag constant representing "now".

Enumeration Type Documentation

An enumeration of bundle element types liblo can handle.

The element of a bundle can either be a message or an other bundle.

Enumerator
LO_ELEMENT_MESSAGE 

bundle element is a message

LO_ELEMENT_BUNDLE 

bundle element is a bundle

enum lo_type

An enumeration of the OSC types liblo can send and receive.

The value of the enumeration is the typechar used to tag messages and to specify arguments with lo_send().

Enumerator
LO_INT32 

32 bit signed integer.

LO_FLOAT 

32 bit IEEE-754 float.

LO_STRING 

Standard C, NULL terminated string.

LO_BLOB 

OSC binary blob type. Accessed using the lo_blob_*() functions.

LO_INT64 

64 bit signed integer.

LO_TIMETAG 

OSC TimeTag type, represented by the lo_timetag structure.

LO_DOUBLE 

64 bit IEEE-754 double.

LO_SYMBOL 

Standard C, NULL terminated, string. Used in systems which distinguish strings and symbols.

LO_CHAR 

Standard C, 8 bit, char variable.

LO_MIDI 

A 4 byte MIDI packet.

LO_TRUE 

Sybol representing the value True.

LO_FALSE 

Sybol representing the value False.

LO_NIL 

Sybol representing the value Nil.

LO_INFINITUM 

Sybol representing the value Infinitum.

Function Documentation

int lo_address_errno ( lo_address  a)

Return the error number from the last failed lo_send() or lo_address_new() call.

const char* lo_address_errstr ( lo_address  a)

Return the error string from the last failed lo_send() or lo_address_new() call.

void lo_address_free ( lo_address  t)

Free the memory used by the lo_address object.

int lo_address_get_ttl ( lo_address  t)

Get the Time-to-Live value for a given target address.

Parameters
tAn OSC address.
Returns
An integer specifying the scope of a multicast UDP message.
lo_address lo_address_new ( const char *  host,
const char *  port 
)

Declare an OSC destination, given IP address and port number. Same as lo_address_new_with_proto(), but using UDP.

Parameters
hostAn IP address or number, or NULL for the local machine.
porta decimal port number or service name.

The lo_address object may be used as the target of OSC messages.

Note: if you wish to receive replies from the target of this address, you must first create a lo_server_thread or lo_server object which will receive the replies. The last lo_server(_thread) object craeted will be the receiver.

lo_address lo_address_new_from_url ( const char *  url)

Create a lo_address object from an OSC URL.

example: "osc.udp://localhost:4444/my/path/"

lo_address lo_address_new_with_proto ( int  proto,
const char *  host,
const char *  port 
)

Declare an OSC destination, given IP address and port number, specifying protocol.

Parameters
protoThe protocol to use, must be one of LO_UDP, LO_TCP or LO_UNIX.
hostAn IP address or number, or NULL for the local machine.
porta decimal port number or service name.

The lo_address object may be used as the target of OSC messages.

Note: if you wish to receive replies from the target of this address, you must first create a lo_server_thread or lo_server object which will receive the replies. The last lo_server(_thread) object created will be the receiver.

void lo_address_set_ttl ( lo_address  t,
int  ttl 
)

Set the Time-to-Live value for a given target address.

This is required for sending multicast UDP messages. A value of 1 (the usual case) keeps the message within the subnet, while 255 means a global, unrestricted scope.

Parameters
tAn OSC address.
ttlAn integer specifying the scope of a multicast UDP message.
void* lo_blob_dataptr ( lo_blob  b)

Return a pointer to the start of the blob data to allow contents to be changed.

uint32_t lo_blob_datasize ( lo_blob  b)

Return the amount of valid data in a lo_blob object.

If you want to know the storage size, use lo_arg_size().

void lo_blob_free ( lo_blob  b)

Free the memory taken by a blob.

lo_blob lo_blob_new ( int32_t  size,
const void *  data 
)

Create a new OSC blob type.

Parameters
sizeThe amount of space to allocate in the blob structure.
dataThe data that will be used to initialise the blob, should be size bytes long.
int lo_send ( lo_address  targ,
const char *  path,
const char *  type,
  ... 
)

Send a OSC formatted message to the address specified.

Parameters
targThe target OSC address
pathThe OSC path the message will be delivered to
typeThe types of the data items in the message, types are defined in lo_osc_types.h
...The data values to be transmitted. The types of the arguments passed here must agree with the types specified in the type parameter.

example:

lo_send(t, "/foo/bar", "ff", 0.1f, 23.0f);
Returns
-1 on failure.
int lo_send_from ( lo_address  targ,
lo_server  from,
lo_timetag  ts,
const char *  path,
const char *  type,
  ... 
)

Send a OSC formatted message to the address specified, from the same socket as the specified server.

Parameters
targThe target OSC address
fromThe server to send message from (can be NULL to use new socket)
tsThe OSC timetag timestamp at which the message will be processed (can be LO_TT_IMMEDIATE if you don't want to attach a timetag)
pathThe OSC path the message will be delivered to
typeThe types of the data items in the message, types are defined in lo_osc_types.h
...The data values to be transmitted. The types of the arguments passed here must agree with the types specified in the type parameter.

example:

serv = lo_server_new(NULL, err);
lo_server_add_method(serv, "/reply", "ss", reply_handler, NULL);
lo_send_from(t, serv, LO_TT_IMMEDIATE, "/foo/bar", "ff", 0.1f, 23.0f);
Returns
on success, the number of bytes sent, or -1 on failure.
int lo_send_timestamped ( lo_address  targ,
lo_timetag  ts,
const char *  path,
const char *  type,
  ... 
)

Send a OSC formatted message to the address specified, scheduled to be dispatch at some time in the future.

Parameters
targThe target OSC address
tsThe OSC timetag timestamp at which the message will be processed
pathThe OSC path the message will be delivered to
typeThe types of the data items in the message, types are defined in lo_osc_types.h
...The data values to be transmitted. The types of the arguments passed here must agree with the types specified in the type parameter.

example:

lo_timetag now;<br>
lo_timetag_now(&now);<br>
lo_send_timestamped(t, now, "/foo/bar", "ff", 0.1f, 23.0f);
Returns
on success, the number of bytes sent, or -1 on failure.
void lo_version ( char *  verstr,
int  verstr_size,
int *  major,
int *  minor,
char *  extra,
int  extra_size,
int *  lt_major,
int *  lt_minor,
int *  lt_bug 
)

Get information on the version of liblo current in use.

All parameters are optional and can be given the value of 0 if that information is not desired. For example, to get just the version as a string, call lo_version(str, size, 0, 0, 0, 0, 0, 0, 0);

The "lt" fields, called the ABI version, corresponds to libtool's versioning system for binary interface compatibility, and is not related to the library version number. This information is usually encoded in the filename of the shared library.

Typically the string returned in 'verstr' should correspond with $major.$minor$extra, e.g., "0.28rc". If no 'extra' information is present, e.g., "0.28", extra will given the null string.

Parameters
verstrA buffer to receive a string describing the library version.
verstr_sizeSize of the buffer pointed to by string.
majorLocation to receive the library major version.
minorLocation to receive the library minor version.
extraLocation to receive the library version extra string.
extra_sizeSize of the buffer pointed to by extra.
lt_majorLocation to receive the ABI major version.
lt_minorLocation to receive the ABI minor version.
lt_bugLocation to receive the ABI 'bugfix' version.