CURLOPT_INTERLEAVEFUNCTION(3)				     curl_easy_setopt options				     CURLOPT_INTERLEAVEFUNCTION(3)

NAME

       CURLOPT_INTERLEAVEFUNCTION - callback function for RTSP interleaved data

SYNOPSIS

       #include <curl/curl.h>

       size_t interleave_callback(void *ptr, size_t size, size_t nmemb,
				  void *userdata);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERLEAVEFUNCTION,
				 interleave_callback);

DESCRIPTION

       Pass a pointer to your callback function, which should match the prototype shown above.

       This  callback  function gets called by libcurl as soon as it has received interleaved RTP data. This function gets called for each $ block
       and therefore contains exactly one upper-layer protocol unit (e.g.  one RTP packet). Curl writes the interleaved  header  as  well  as  the
       included  data  for  each call. The first byte is always an ASCII dollar sign. The dollar sign is followed by a one byte channel identifier
       and then a 2 byte integer length in network byte order. See RFC2326 Section 10.12 for more information on how RTP interleaving behaves.	If
       unset or set to NULL, curl will use the default write function.

       Interleaved RTP poses some challenges for the client application. Since the stream data is sharing the RTSP control connection, it is crit-
       ical to service the RTP in a timely fashion. If the RTP data is not handled quickly, subsequent response processing may become unreasonably
       delayed and the connection may close. The application may use CURL_RTSPREQ_RECEIVE to service RTP data when no requests are desired. If the
       application makes a request, (e.g.  CURL_RTSPREQ_PAUSE) then the response handler will process any pending  RTP	data  before  marking  the
       request as finished.

DEFAULT

       NULL

PROTOCOLS

       RTSP

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.20.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_INTERLEAVEFUNCTION(3), CURLOPT_RTSP_REQUEST(3),

libcurl 7.54.0							 February 03, 2016				     CURLOPT_INTERLEAVEFUNCTION(3)