2014-06-19 18:58:18 -04:00
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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2016-02-02 18:19:02 -05:00
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.\" * are also available at https://curl.haxx.se/docs/copyright.html.
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2014-06-19 18:58:18 -04:00
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_INTERLEAVEFUNCTION 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_INTERLEAVEFUNCTION \- callback function for RTSP interleaved data
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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size_t interleave_callback(void *ptr, size_t size, size_t nmemb,
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void *userdata);
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERLEAVEFUNCTION,
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interleave_callback);
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.SH DESCRIPTION
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Pass a pointer to your callback function, which should match the prototype
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shown above.
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This callback function gets called by libcurl as soon as it has received
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interleaved RTP data. This function gets called for each $ block and therefore
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contains exactly one upper-layer protocol unit (e.g. one RTP packet). Curl
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writes the interleaved header as well as the included data for each call. The
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first byte is always an ASCII dollar sign. The dollar sign is followed by a
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one byte channel identifier and then a 2 byte integer length in network byte
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order. See \fIRFC2326 Section 10.12\fP for more information on how RTP
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interleaving behaves. If unset or set to NULL, curl will use the default write
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function.
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Interleaved RTP poses some challenges for the client application. Since the
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stream data is sharing the RTSP control connection, it is critical to service
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the RTP in a timely fashion. If the RTP data is not handled quickly,
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subsequent response processing may become unreasonably delayed and the
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connection may close. The application may use \fICURL_RTSPREQ_RECEIVE\fP to
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service RTP data when no requests are desired. If the application makes a
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request, (e.g. \fICURL_RTSPREQ_PAUSE\fP) then the response handler will
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process any pending RTP data before marking the request as finished.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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RTSP
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.SH EXAMPLE
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TODO
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.SH AVAILABILITY
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Added in 7.20.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR CURLOPT_INTERLEAVEFUNCTION "(3), " CURLOPT_RTSP_REQUEST "(3), "
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