Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/libcurl/opts/CURLOPT_INTERLEAVEFUNCTION.3 @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 .\" **************************************************************************
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2 .\" * _ _ ____ _
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3 .\" * Project ___| | | | _ \| |
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4 .\" * / __| | | | |_) | |
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5 .\" * | (__| |_| | _ <| |___
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6 .\" * \___|\___/|_| \_\_____|
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7 .\" *
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8 .\" * Copyright (C) 1998 - 2014, 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 .\" *
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10 .\" * This software is licensed as described in the file COPYING, which
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11 .\" * you should have received as part of this distribution. The terms
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12 .\" * are also available at https://curl.haxx.se/docs/copyright.html.
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13 .\" *
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14 .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 .\" * copies of the Software, and permit persons to whom the Software is
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16 .\" * furnished to do so, under the terms of the COPYING file.
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17 .\" *
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18 .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 .\" * KIND, either express or implied.
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20 .\" *
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21 .\" **************************************************************************
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22 .\"
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23 .TH CURLOPT_INTERLEAVEFUNCTION 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
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24 .SH NAME
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25 CURLOPT_INTERLEAVEFUNCTION \- callback function for RTSP interleaved data
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26 .SH SYNOPSIS
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27 .nf
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28 #include <curl/curl.h>
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29
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30 size_t interleave_callback(void *ptr, size_t size, size_t nmemb,
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31 void *userdata);
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32
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33 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERLEAVEFUNCTION,
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34 interleave_callback);
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35 .SH DESCRIPTION
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36 Pass a pointer to your callback function, which should match the prototype
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37 shown above.
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38
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39 This callback function gets called by libcurl as soon as it has received
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40 interleaved RTP data. This function gets called for each $ block and therefore
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41 contains exactly one upper-layer protocol unit (e.g. one RTP packet). Curl
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42 writes the interleaved header as well as the included data for each call. The
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43 first byte is always an ASCII dollar sign. The dollar sign is followed by a
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44 one byte channel identifier and then a 2 byte integer length in network byte
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45 order. See \fIRFC2326 Section 10.12\fP for more information on how RTP
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46 interleaving behaves. If unset or set to NULL, curl will use the default write
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47 function.
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48
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49 Interleaved RTP poses some challenges for the client application. Since the
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50 stream data is sharing the RTSP control connection, it is critical to service
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51 the RTP in a timely fashion. If the RTP data is not handled quickly,
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52 subsequent response processing may become unreasonably delayed and the
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53 connection may close. The application may use \fICURL_RTSPREQ_RECEIVE\fP to
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54 service RTP data when no requests are desired. If the application makes a
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55 request, (e.g. \fICURL_RTSPREQ_PAUSE\fP) then the response handler will
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56 process any pending RTP data before marking the request as finished.
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57
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58 The \fICURLOPT_INTERLEAVEDATA(3)\fP is passed in the \fIuserdata\fP argument in
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59 the callback.
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60 .SH DEFAULT
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61 NULL, the interleave data is then passed to the regular write function:
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62 \fICURLOPT_WRITEFUNCTION(3)\fP.
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63 .SH PROTOCOLS
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64 RTSP
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65 .SH EXAMPLE
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66 .nf
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67 static size_t rtp_write(void *ptr, size_t size, size_t nmemb, void *user)
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68 {
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69 struct local *l = (struct local *)user;
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70 /* take care of the packet in 'ptr', then return... */
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71 return size * nmemb;
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72 }
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73 {
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74 struct local rtp_data;
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75 curl_easy_setopt(curl, CURLOPT_INTERLEAVEFUNCTION, rtp_write);
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76 curl_easy_setopt(curl, CURLOPT_INTERLEAVEDATA, &rtp_data);
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77 }
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78 .fi
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79 .SH AVAILABILITY
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80 Added in 7.20.0
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81 .SH RETURN VALUE
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82 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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83 .SH "SEE ALSO"
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84 .BR CURLOPT_INTERLEAVEDATA "(3), " CURLOPT_RTSP_REQUEST "(3), "