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<h1>rtcpcompoundpacketbuilder.h</h1><a href="rtcpcompoundpacketbuilder_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> This file is a part of JRTPLIB</span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (c) 1999-2007 Jori Liesenborgs</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Contact: jori.liesenborgs@gmail.com</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> This library was developed at the "Expertisecentrum Digitale Media"</span>
<a name="l00009"></a>00009 <span class="comment"> (http://www.edm.uhasselt.be), a research center of the Hasselt University</span>
<a name="l00010"></a>00010 <span class="comment"> (http://www.uhasselt.be). The library is based upon work done for </span>
<a name="l00011"></a>00011 <span class="comment"> my thesis at the School for Knowledge Technology (Belgium/The Netherlands).</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> Permission is hereby granted, free of charge, to any person obtaining a</span>
<a name="l00014"></a>00014 <span class="comment"> copy of this software and associated documentation files (the "Software"),</span>
<a name="l00015"></a>00015 <span class="comment"> to deal in the Software without restriction, including without limitation</span>
<a name="l00016"></a>00016 <span class="comment"> the rights to use, copy, modify, merge, publish, distribute, sublicense,</span>
<a name="l00017"></a>00017 <span class="comment"> and/or sell copies of the Software, and to permit persons to whom the</span>
<a name="l00018"></a>00018 <span class="comment"> Software is furnished to do so, subject to the following conditions:</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> The above copyright notice and this permission notice shall be included</span>
<a name="l00021"></a>00021 <span class="comment"> in all copies or substantial portions of the Software.</span>
<a name="l00022"></a>00022 <span class="comment"></span>
<a name="l00023"></a>00023 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</span>
<a name="l00024"></a>00024 <span class="comment"> OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span>
<a name="l00025"></a>00025 <span class="comment"> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span>
<a name="l00026"></a>00026 <span class="comment"> THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span>
<a name="l00027"></a>00027 <span class="comment"> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span>
<a name="l00028"></a>00028 <span class="comment"> FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS</span>
<a name="l00029"></a>00029 <span class="comment"> IN THE SOFTWARE.</span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">*/</span>
<a name="l00032"></a>00032
<a name="l00037"></a>00037 <span class="preprocessor">#ifndef RTCPCOMPOUNDPACKETBUILDER_H</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00039"></a>00039 <span class="preprocessor">#define RTCPCOMPOUNDPACKETBUILDER_H</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include "rtpconfig.h"</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include "<a class="code" href="rtcpcompoundpacket_8h.html">rtcpcompoundpacket.h</a>"</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include "<a class="code" href="rtptimeutilities_8h.html">rtptimeutilities.h</a>"</span>
<a name="l00044"></a>00044 <span class="preprocessor">#include "<a class="code" href="rtcpsdespacket_8h.html">rtcpsdespacket.h</a>"</span>
<a name="l00045"></a>00045 <span class="preprocessor">#include "<a class="code" href="rtperrors_8h.html">rtperrors.h</a>"</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <list></span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="keyword">class </span><a class="code" href="classRTPMemoryManager.html" title="A memory manager.">RTPMemoryManager</a>;
<a name="l00049"></a>00049
<a name="l00056"></a><a class="code" href="classRTCPCompoundPacketBuilder.html">00056</a> <span class="keyword">class </span><a class="code" href="classRTCPCompoundPacketBuilder.html" title="This class can be used to construct an RTCP compound packet.">RTCPCompoundPacketBuilder</a> : <span class="keyword">public</span> <a class="code" href="classRTCPCompoundPacket.html" title="Represents an RTCP compound packet.">RTCPCompoundPacket</a>
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="keyword">public</span>:
<a name="l00060"></a>00060 <a class="code" href="classRTCPCompoundPacketBuilder.html#4de1f2db8caa78e32e629e642c5f3166" title="Constructs an RTCPCompoundPacketBuilder instance, optionally installing a memory...">RTCPCompoundPacketBuilder</a>(<a class="code" href="classRTPMemoryManager.html" title="A memory manager.">RTPMemoryManager</a> *memmgr = 0);
<a name="l00061"></a>00061 ~<a class="code" href="classRTCPCompoundPacketBuilder.html" title="This class can be used to construct an RTCP compound packet.">RTCPCompoundPacketBuilder</a>();
<a name="l00062"></a>00062
<a name="l00067"></a>00067 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#ff61f706910a357bcc3560acdd5cd249" title="Starts building an RTCP compound packet with maximum size maxpacketsize.">InitBuild</a>(<span class="keywordtype">size_t</span> maxpacketsize);
<a name="l00068"></a>00068
<a name="l00073"></a>00073 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#ff61f706910a357bcc3560acdd5cd249" title="Starts building an RTCP compound packet with maximum size maxpacketsize.">InitBuild</a>(<span class="keywordtype">void</span> *externalbuffer,<span class="keywordtype">size_t</span> buffersize);
<a name="l00074"></a>00074
<a name="l00080"></a>00080 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#6799d97eb08dae5bdbf66731b4eeddcc" title="Adds a sender report to the compound packet.">StartSenderReport</a>(uint32_t senderssrc,<span class="keyword">const</span> <a class="code" href="classRTPNTPTime.html" title="This is a simple wrapper for the most significant word (MSW) and least significant...">RTPNTPTime</a> &ntptimestamp,uint32_t rtptimestamp,
<a name="l00081"></a>00081 uint32_t packetcount,uint32_t octetcount);
<a name="l00082"></a>00082
<a name="l00088"></a>00088 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#80ef812bcc888956afe6b95ef5443fa2" title="Adds a receiver report to the compound packet.">StartReceiverReport</a>(uint32_t senderssrc);
<a name="l00089"></a>00089
<a name="l00094"></a>00094 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#e46386b12cb888a2b912f61c07ed8d33" title="Adds the report block information specified by the function&#39;s arguments.">AddReportBlock</a>(uint32_t ssrc,uint8_t fractionlost,int32_t packetslost,uint32_t exthighestseq,
<a name="l00095"></a>00095 uint32_t jitter,uint32_t lsr,uint32_t dlsr);
<a name="l00096"></a>00096
<a name="l00098"></a>00098 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#7e8ee7b24ddddc125d1ba3851815717b" title="Starts an SDES chunk for participant ssrc.">AddSDESSource</a>(uint32_t ssrc);
<a name="l00099"></a>00099
<a name="l00104"></a>00104 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#0f59a63113bf6a7435c82a9110c3963b" title="Adds a normal (non-private) SDES item of type t to the current SDES chunk.">AddSDESNormalItem</a>(<a class="code" href="classRTCPSDESPacket.html#8f8a25695509ae0d02ad30ef8a4d8105" title="Identifies the type of an SDES item.">RTCPSDESPacket::ItemType</a> t,<span class="keyword">const</span> <span class="keywordtype">void</span> *itemdata,uint8_t itemlength);
<a name="l00105"></a>00105 <span class="preprocessor">#ifdef RTP_SUPPORT_SDESPRIV</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span>
<a name="l00107"></a>00107 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#df2c561723e1f015345f961dae504cab" title="Adds an SDES PRIV item described by the function&#39;s arguments to the current SDES...">AddSDESPrivateItem</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *prefixdata,uint8_t prefixlength,<span class="keyword">const</span> <span class="keywordtype">void</span> *valuedata,
<a name="l00108"></a>00108 uint8_t valuelength);
<a name="l00109"></a>00109 <span class="preprocessor">#endif // RTP_SUPPORT_SDESPRIV</span>
<a name="l00110"></a>00110 <span class="preprocessor"></span>
<a name="l00116"></a>00116 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#3124b43b59d4e2f82cf1a778ff1a5f7d" title="Adds a BYE packet to the compound packet.">AddBYEPacket</a>(uint32_t *ssrcs,uint8_t numssrcs,<span class="keyword">const</span> <span class="keywordtype">void</span> *reasondata,uint8_t reasonlength);
<a name="l00117"></a>00117
<a name="l00122"></a>00122 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#e27e5a00f7718b7947e9d61f97e9cb10" title="Adds the APP packet specified by the arguments to the compound packet.">AddAPPPacket</a>(uint8_t subtype,uint32_t ssrc,<span class="keyword">const</span> uint8_t name[4],<span class="keyword">const</span> <span class="keywordtype">void</span> *appdata,<span class="keywordtype">size_t</span> appdatalen);
<a name="l00123"></a>00123
<a name="l00128"></a>00128 <span class="keywordtype">int</span> <a class="code" href="classRTCPCompoundPacketBuilder.html#7c0d5aa7fba12208892c79c91c60eb53" title="Finishes building the compound packet.">EndBuild</a>();
<a name="l00129"></a>00129 <span class="keyword">private</span>:
<a name="l00130"></a>00130 <span class="keyword">class </span>Buffer
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 <span class="keyword">public</span>:
<a name="l00133"></a>00133 Buffer():packetdata(0),packetlength(0) { }
<a name="l00134"></a>00134 Buffer(uint8_t *data,<span class="keywordtype">size_t</span> len):packetdata(data),packetlength(len) { }
<a name="l00135"></a>00135
<a name="l00136"></a>00136 uint8_t *packetdata;
<a name="l00137"></a>00137 <span class="keywordtype">size_t</span> packetlength;
<a name="l00138"></a>00138 };
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="keyword">class </span>Report : <span class="keyword">public</span> RTPMemoryObject
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142 <span class="keyword">public</span>:
<a name="l00143"></a>00143 Report(<a class="code" href="classRTPMemoryManager.html" title="A memory manager.">RTPMemoryManager</a> *mgr) : RTPMemoryObject(mgr)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 headerdata = (uint8_t *)headerdata32;
<a name="l00146"></a>00146 isSR = <span class="keyword">false</span>;
<a name="l00147"></a>00147 headerlength = 0;
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149 ~Report() { Clear(); }
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keywordtype">void</span> Clear()
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 std::list<Buffer>::const_iterator it;
<a name="l00154"></a>00154 <span class="keywordflow">for</span> (it = reportblocks.begin() ; it != reportblocks.end() ; it++)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="keywordflow">if</span> ((*it).packetdata)
<a name="l00157"></a>00157 RTPDeleteByteArray((*it).packetdata,GetMemoryManager());
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159 reportblocks.clear();
<a name="l00160"></a>00160 isSR = <span class="keyword">false</span>;
<a name="l00161"></a>00161 headerlength = 0;
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keywordtype">size_t</span> NeededBytes()
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="keywordtype">size_t</span> x,n,d,r;
<a name="l00167"></a>00167 n = reportblocks.size();
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (n == 0)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="keywordflow">if</span> (headerlength == 0)
<a name="l00171"></a>00171 <span class="keywordflow">return</span> 0;
<a name="l00172"></a>00172 x = <span class="keyword">sizeof</span>(RTCPCommonHeader)+headerlength;
<a name="l00173"></a>00173 }
<a name="l00174"></a>00174 <span class="keywordflow">else</span>
<a name="l00175"></a>00175 {
<a name="l00176"></a>00176 x = n*<span class="keyword">sizeof</span>(RTCPReceiverReport);
<a name="l00177"></a>00177 d = n/31; <span class="comment">// max 31 reportblocks per report</span>
<a name="l00178"></a>00178 r = n%31;
<a name="l00179"></a>00179 <span class="keywordflow">if</span> (r != 0)
<a name="l00180"></a>00180 d++;
<a name="l00181"></a>00181 x += d*(<span class="keyword">sizeof</span>(RTCPCommonHeader)+<span class="keyword">sizeof</span>(uint32_t)); <span class="comment">/* header and SSRC */</span>
<a name="l00182"></a>00182 <span class="keywordflow">if</span> (isSR)
<a name="l00183"></a>00183 x += <span class="keyword">sizeof</span>(RTCPSenderReport);
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185 <span class="keywordflow">return</span> x;
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keywordtype">size_t</span> NeededBytesWithExtraReportBlock()
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 <span class="keywordtype">size_t</span> x,n,d,r;
<a name="l00191"></a>00191 n = reportblocks.size() + 1; <span class="comment">// +1 for the extra block</span>
<a name="l00192"></a>00192 x = n*<span class="keyword">sizeof</span>(RTCPReceiverReport);
<a name="l00193"></a>00193 d = n/31; <span class="comment">// max 31 reportblocks per report</span>
<a name="l00194"></a>00194 r = n%31;
<a name="l00195"></a>00195 <span class="keywordflow">if</span> (r != 0)
<a name="l00196"></a>00196 d++;
<a name="l00197"></a>00197 x += d*(<span class="keyword">sizeof</span>(RTCPCommonHeader)+<span class="keyword">sizeof</span>(uint32_t)); <span class="comment">/* header and SSRC */</span>
<a name="l00198"></a>00198 <span class="keywordflow">if</span> (isSR)
<a name="l00199"></a>00199 x += <span class="keyword">sizeof</span>(RTCPSenderReport);
<a name="l00200"></a>00200 <span class="keywordflow">return</span> x;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordtype">bool</span> isSR;
<a name="l00204"></a>00204
<a name="l00205"></a>00205 uint8_t *headerdata;
<a name="l00206"></a>00206 uint32_t headerdata32[(<span class="keyword">sizeof</span>(uint32_t)+<span class="keyword">sizeof</span>(RTCPSenderReport))/<span class="keyword">sizeof</span>(uint32_t)]; <span class="comment">// either for ssrc and sender info or just ssrc</span>
<a name="l00207"></a>00207 <span class="keywordtype">size_t</span> headerlength;
<a name="l00208"></a>00208 std::list<Buffer> reportblocks;
<a name="l00209"></a>00209 };
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keyword">class </span>SDESSource : <span class="keyword">public</span> RTPMemoryObject
<a name="l00212"></a>00212 {
<a name="l00213"></a>00213 <span class="keyword">public</span>:
<a name="l00214"></a>00214 SDESSource(uint32_t s,<a class="code" href="classRTPMemoryManager.html" title="A memory manager.">RTPMemoryManager</a> *mgr) : RTPMemoryObject(mgr),ssrc(s),totalitemsize(0) { }
<a name="l00215"></a>00215 ~SDESSource()
<a name="l00216"></a>00216 {
<a name="l00217"></a>00217 std::list<Buffer>::const_iterator it;
<a name="l00218"></a>00218 <span class="keywordflow">for</span> (it = items.begin() ; it != items.end() ; it++)
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 <span class="keywordflow">if</span> ((*it).packetdata)
<a name="l00221"></a>00221 RTPDeleteByteArray((*it).packetdata,GetMemoryManager());
<a name="l00222"></a>00222 }
<a name="l00223"></a>00223 items.clear();
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="keywordtype">size_t</span> NeededBytes()
<a name="l00227"></a>00227 {
<a name="l00228"></a>00228 <span class="keywordtype">size_t</span> x,r;
<a name="l00229"></a>00229 x = totalitemsize + 1; <span class="comment">// +1 for the 0 byte which terminates the item list</span>
<a name="l00230"></a>00230 r = x%<span class="keyword">sizeof</span>(uint32_t);
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (r != 0)
<a name="l00232"></a>00232 x += (<span class="keyword">sizeof</span>(uint32_t)-r); <span class="comment">// make sure it ends on a 32 bit boundary</span>
<a name="l00233"></a>00233 x += <span class="keyword">sizeof</span>(uint32_t); <span class="comment">// for ssrc</span>
<a name="l00234"></a>00234 <span class="keywordflow">return</span> x;
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordtype">size_t</span> NeededBytesWithExtraItem(uint8_t itemdatalength)
<a name="l00238"></a>00238 {
<a name="l00239"></a>00239 <span class="keywordtype">size_t</span> x,r;
<a name="l00240"></a>00240 x = totalitemsize + <span class="keyword">sizeof</span>(RTCPSDESHeader) + (<span class="keywordtype">size_t</span>)itemdatalength + 1;
<a name="l00241"></a>00241 r = x%<span class="keyword">sizeof</span>(uint32_t);
<a name="l00242"></a>00242 <span class="keywordflow">if</span> (r != 0)
<a name="l00243"></a>00243 x += (<span class="keyword">sizeof</span>(uint32_t)-r); <span class="comment">// make sure it ends on a 32 bit boundary</span>
<a name="l00244"></a>00244 x += <span class="keyword">sizeof</span>(uint32_t); <span class="comment">// for ssrc</span>
<a name="l00245"></a>00245 <span class="keywordflow">return</span> x;
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247
<a name="l00248"></a>00248 <span class="keywordtype">void</span> AddItem(uint8_t *buf,<span class="keywordtype">size_t</span> len)
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250 Buffer b(buf,len);
<a name="l00251"></a>00251 totalitemsize += len;
<a name="l00252"></a>00252 items.push_back(b);
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254
<a name="l00255"></a>00255 uint32_t ssrc;
<a name="l00256"></a>00256 std::list<Buffer> items;
<a name="l00257"></a>00257 <span class="keyword">private</span>:
<a name="l00258"></a>00258 <span class="keywordtype">size_t</span> totalitemsize;
<a name="l00259"></a>00259 };
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="keyword">class </span>SDES : <span class="keyword">public</span> RTPMemoryObject
<a name="l00262"></a>00262 {
<a name="l00263"></a>00263 <span class="keyword">public</span>:
<a name="l00264"></a>00264 SDES(<a class="code" href="classRTPMemoryManager.html" title="A memory manager.">RTPMemoryManager</a> *mgr) : RTPMemoryObject(mgr) { sdesit = sdessources.end(); }
<a name="l00265"></a>00265 ~SDES() { Clear(); }
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="keywordtype">void</span> Clear()
<a name="l00268"></a>00268 {
<a name="l00269"></a>00269 std::list<SDESSource *>::const_iterator it;
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="keywordflow">for</span> (it = sdessources.begin() ; it != sdessources.end() ; it++)
<a name="l00272"></a>00272 RTPDelete(*it,GetMemoryManager());
<a name="l00273"></a>00273 sdessources.clear();
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275
<a name="l00276"></a>00276 <span class="keywordtype">int</span> AddSSRC(uint32_t ssrc)
<a name="l00277"></a>00277 {
<a name="l00278"></a>00278 SDESSource *s = RTPNew(GetMemoryManager(),<a class="code" href="rtpmemorymanager_8h.html#944f16b949c09f5864f76a1fcc3e8fb8" title="Buffer to store an SDESSource instance.">RTPMEM_TYPE_CLASS_SDESSOURCE</a>) SDESSource(ssrc,GetMemoryManager());
<a name="l00279"></a>00279 <span class="keywordflow">if</span> (s == 0)
<a name="l00280"></a>00280 <span class="keywordflow">return</span> ERR_RTP_OUTOFMEM;
<a name="l00281"></a>00281 sdessources.push_back(s);
<a name="l00282"></a>00282 sdesit = sdessources.end();
<a name="l00283"></a>00283 sdesit--;
<a name="l00284"></a>00284 <span class="keywordflow">return</span> 0;
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="keywordtype">int</span> AddItem(uint8_t *buf,<span class="keywordtype">size_t</span> len)
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 <span class="keywordflow">if</span> (sdessources.empty())
<a name="l00290"></a>00290 <span class="keywordflow">return</span> ERR_RTP_RTCPCOMPPACKBUILDER_NOCURRENTSOURCE;
<a name="l00291"></a>00291 (*sdesit)->AddItem(buf,len);
<a name="l00292"></a>00292 <span class="keywordflow">return</span> 0;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <span class="keywordtype">size_t</span> NeededBytes()
<a name="l00296"></a>00296 {
<a name="l00297"></a>00297 std::list<SDESSource *>::const_iterator it;
<a name="l00298"></a>00298 <span class="keywordtype">size_t</span> x = 0;
<a name="l00299"></a>00299 <span class="keywordtype">size_t</span> n,d,r;
<a name="l00300"></a>00300
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (sdessources.empty())
<a name="l00302"></a>00302 <span class="keywordflow">return</span> 0;
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="keywordflow">for</span> (it = sdessources.begin() ; it != sdessources.end() ; it++)
<a name="l00305"></a>00305 x += (*it)->NeededBytes();
<a name="l00306"></a>00306 n = sdessources.size();
<a name="l00307"></a>00307 d = n/31;
<a name="l00308"></a>00308 r = n%31;
<a name="l00309"></a>00309 <span class="keywordflow">if</span> (r != 0)
<a name="l00310"></a>00310 d++;
<a name="l00311"></a>00311 x += d*<span class="keyword">sizeof</span>(RTCPCommonHeader);
<a name="l00312"></a>00312 <span class="keywordflow">return</span> x;
<a name="l00313"></a>00313 }
<a name="l00314"></a>00314
<a name="l00315"></a>00315 <span class="keywordtype">size_t</span> NeededBytesWithExtraItem(uint8_t itemdatalength)
<a name="l00316"></a>00316 {
<a name="l00317"></a>00317 std::list<SDESSource *>::const_iterator it;
<a name="l00318"></a>00318 <span class="keywordtype">size_t</span> x = 0;
<a name="l00319"></a>00319 <span class="keywordtype">size_t</span> n,d,r;
<a name="l00320"></a>00320
<a name="l00321"></a>00321 <span class="keywordflow">if</span> (sdessources.empty())
<a name="l00322"></a>00322 <span class="keywordflow">return</span> 0;
<a name="l00323"></a>00323
<a name="l00324"></a>00324 <span class="keywordflow">for</span> (it = sdessources.begin() ; it != sdesit ; it++)
<a name="l00325"></a>00325 x += (*it)->NeededBytes();
<a name="l00326"></a>00326 x += (*sdesit)->NeededBytesWithExtraItem(itemdatalength);
<a name="l00327"></a>00327 n = sdessources.size();
<a name="l00328"></a>00328 d = n/31;
<a name="l00329"></a>00329 r = n%31;
<a name="l00330"></a>00330 <span class="keywordflow">if</span> (r != 0)
<a name="l00331"></a>00331 d++;
<a name="l00332"></a>00332 x += d*<span class="keyword">sizeof</span>(RTCPCommonHeader);
<a name="l00333"></a>00333 <span class="keywordflow">return</span> x;
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <span class="keywordtype">size_t</span> NeededBytesWithExtraSource()
<a name="l00337"></a>00337 {
<a name="l00338"></a>00338 std::list<SDESSource *>::const_iterator it;
<a name="l00339"></a>00339 <span class="keywordtype">size_t</span> x = 0;
<a name="l00340"></a>00340 <span class="keywordtype">size_t</span> n,d,r;
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="keywordflow">if</span> (sdessources.empty())
<a name="l00343"></a>00343 <span class="keywordflow">return</span> 0;
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <span class="keywordflow">for</span> (it = sdessources.begin() ; it != sdessources.end() ; it++)
<a name="l00346"></a>00346 x += (*it)->NeededBytes();
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <span class="comment">// for the extra source we'll need at least 8 bytes (ssrc and four 0 bytes)</span>
<a name="l00349"></a>00349 x += <span class="keyword">sizeof</span>(uint32_t)*2;
<a name="l00350"></a>00350
<a name="l00351"></a>00351 n = sdessources.size() + 1; <span class="comment">// also, the number of sources will increase</span>
<a name="l00352"></a>00352 d = n/31;
<a name="l00353"></a>00353 r = n%31;
<a name="l00354"></a>00354 <span class="keywordflow">if</span> (r != 0)
<a name="l00355"></a>00355 d++;
<a name="l00356"></a>00356 x += d*<span class="keyword">sizeof</span>(RTCPCommonHeader);
<a name="l00357"></a>00357 <span class="keywordflow">return</span> x;
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359
<a name="l00360"></a>00360 std::list<SDESSource *> sdessources;
<a name="l00361"></a>00361 <span class="keyword">private</span>:
<a name="l00362"></a>00362 std::list<SDESSource *>::const_iterator sdesit;
<a name="l00363"></a>00363 };
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordtype">size_t</span> maximumpacketsize;
<a name="l00366"></a>00366 uint8_t *buffer;
<a name="l00367"></a>00367 <span class="keywordtype">bool</span> external;
<a name="l00368"></a>00368 <span class="keywordtype">bool</span> arebuilding;
<a name="l00369"></a>00369
<a name="l00370"></a>00370 Report report;
<a name="l00371"></a>00371 SDES sdes;
<a name="l00372"></a>00372
<a name="l00373"></a>00373 std::list<Buffer> byepackets;
<a name="l00374"></a>00374 <span class="keywordtype">size_t</span> byesize;
<a name="l00375"></a>00375
<a name="l00376"></a>00376 std::list<Buffer> apppackets;
<a name="l00377"></a>00377 <span class="keywordtype">size_t</span> appsize;
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keywordtype">void</span> ClearBuildBuffers();
<a name="l00380"></a>00380 };
<a name="l00381"></a>00381
<a name="l00382"></a>00382 <span class="preprocessor">#endif // RTCPCOMPOUNDPACKETBUILDER_H</span>
<a name="l00383"></a>00383 <span class="preprocessor"></span>
</pre></div></div>
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