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<hr><h1>background_source.cpp</h1><a href="background__source_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025 
00026 <font class="preprocessor">#include "<a class="code" href="stdsound_8h.html">stdsound.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="background__source_8h.html">background_source.h</a>"</font>
00029 
00030 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00032 
00033 <font class="keyword">namespace </font>NLSOUND 
00034 {
00035 
00037 <font class="keyword">const</font> <a class="code" href="namespaceNLMISC.html#a183">TTime</a>             <a class="code" href="namespaceNLSOUND.html#a19">ENV_CHK_INTERVAL</a> = 3000;        
00038 
00039 
<a name="l00040"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a0">00040</a> CBackgroundSource::CBackgroundSource(CBackgroundSound *backgroundSource, <font class="keywordtype">bool</font> spawn, <a class="code" href="namespaceNLSOUND.html#a9">TSpawnEndCallback</a> cb, <font class="keywordtype">void</font> *cbUserParam)
00041 :       CSourceCommon(backgroundSource, spawn, cb, cbUserParam)
00042 {
00043         <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o0">_BackgroundSound</a> = backgroundSource;
00044 }
00045 
<a name="l00046"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a1">00046</a> CBackgroundSource::~CBackgroundSource()
00047 {
00048         <font class="keywordflow">if</font> (_Playing)
00049                 <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a5">stop</a>();
00050 }
00051 
<a name="l00052"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a2">00052</a> <font class="keywordtype">void</font> CBackgroundSource::setSound( <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a> <a class="code" href="driver__opengl__extension__def_8h.html#a356">id</a>, CSoundContext *context)
00053 {
00054         <a class="code" href="debug_8h.html#a6">nlassert</a>(<font class="keyword">false</font>);
00055 }
00056 
<a name="l00057"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a3">00057</a> <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a> CBackgroundSource::getSound()
00058 {
00059         <font class="keywordflow">return</font> NULL;
00060 }
00061         
<a name="l00062"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a7">00062</a> <font class="keywordtype">void</font> CBackgroundSource::setGain( <font class="keywordtype">float</font> gain )
00063 {
00064         CSourceCommon::setGain(gain);
00065 
00066         std::vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00067         <font class="keywordflow">for</font> (; first != last; ++first)
00068         {
00069                 <font class="keywordflow">if</font> (first-&gt;Source != 0)
00070                         first-&gt;Source-&gt;setRelativeGain(<a class="code" href="classNLSOUND_1_1CSourceCommon.html#n6">_Gain</a>);
00071         }
00072 }
<a name="l00073"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a8">00073</a> <font class="keywordtype">void</font> CBackgroundSource::setRelativeGain( <font class="keywordtype">float</font> gain )
00074 {
00075         CSourceCommon::setRelativeGain(gain);
00076 
00077         std::vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00078         <font class="keywordflow">for</font> (; first != last; ++first)
00079         {
00080                 <font class="keywordflow">if</font> (first-&gt;Source != 0)
00081                         first-&gt;Source-&gt;setRelativeGain(<a class="code" href="classNLSOUND_1_1CSourceCommon.html#n6">_Gain</a>);
00082         }
00083 }
00084 
<a name="l00085"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a9">00085</a> <font class="keywordtype">void</font> CBackgroundSource::setPos( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; pos )
00086 {
00087         CSourceCommon::setPos(pos);
00088 
00089         std::vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00090         <font class="keywordflow">for</font> (; first != last; ++first)
00091         {
00092                 <font class="keywordflow">if</font> (first-&gt;Source != 0)
00093                         first-&gt;Source-&gt;setPos(pos);
00094         }
00095 }
00096 
<a name="l00097"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a10">00097</a> <font class="keywordtype">void</font> CBackgroundSource::setVelocity( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; vel )
00098 {
00099         CSourceCommon::setVelocity(vel);
00100 
00101         std::vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00102         <font class="keywordflow">for</font> (; first != last; ++first)
00103         {
00104                 <font class="keywordflow">if</font> (first-&gt;Source != 0)
00105                         first-&gt;Source-&gt;setVelocity(vel);
00106         }
00107 }
<a name="l00108"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a11">00108</a> <font class="keywordtype">void</font> CBackgroundSource::setDirection( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; dir )
00109 {
00110         CSourceCommon::setDirection(dir);
00111 
00112         std::vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00113         <font class="keywordflow">for</font> (; first != last; ++first)
00114         {
00115                 <font class="keywordflow">if</font> (first-&gt;Source != 0)
00116                         first-&gt;Source-&gt;setDirection(dir);
00117         }
00118 }
00119 
00120 
00121 
<a name="l00122"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a4">00122</a> <font class="keywordtype">void</font> CBackgroundSource::play()
00123 {
00124         <font class="keywordflow">if</font> (_Playing)
00125                 <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a5">stop</a>();
00126 
00127         CAudioMixerUser *mixer = CAudioMixerUser::instance();
00128                 
00129         <font class="keyword">const</font> vector&lt;CBackgroundSound::TSoundInfo&gt; &amp;sounds = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o0">_BackgroundSound</a>-&gt;getSounds();
00130         vector&lt;CBackgroundSound::TSoundInfo&gt;::const_iterator first(sounds.begin()), last(sounds.end());
00131 
00132         <font class="keywordflow">for</font> (; first != last; ++first)
00133         {
00134                 TSubSource subSource;
00135                 subSource.Source = mixer-&gt;createSource(first-&gt;SoundName, <font class="keyword">false</font>);
00136                 subSource.Filter = first-&gt;Filter;
00137                 subSource.FadeStart = 0;
00138                 subSource.FilterFadeIn = first-&gt;FilterFadeIn;
00139                 subSource.FilterFadeOut = first-&gt;FilterFadeOut;
00140 
00141                 <font class="keywordflow">if</font> (subSource.Source &amp;&amp; <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#c0">checkFilter</a>(subSource.Filter))
00142                 {
00143                         subSource.Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u0">SUB_STATUS_PLAY</a>;
00144                         subSource.Source-&gt;setRelativeGain(<a class="code" href="classNLSOUND_1_1CSourceCommon.html#n6">_Gain</a>);
00145                         subSource.Source-&gt;setPos(<a class="code" href="classNLSOUND_1_1CSourceCommon.html#n3">_Position</a>);
00146                         subSource.Source-&gt;play();
00147                 }
00148                 <font class="keywordflow">else</font>
00149                 {
00150                         subSource.Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u1">SUB_STATUS_STOP</a>;
00151                 }
00152 
00153                 <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.push_back(subSource);
00154         }
00155 
00156         <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o2">_LastCheck</a> = <a class="code" href="classNLMISC_1_1CTime.html#d1">NLMISC::CTime::getLocalTime</a>();
00157 
00158         <font class="comment">// Set an event for next env checking.</font>
00159         mixer-&gt;addEvent(<font class="keyword">this</font>, <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o2">_LastCheck</a>+<a class="code" href="namespaceNLSOUND.html#a19">ENV_CHK_INTERVAL</a>);
00160 
00161         CSourceCommon::play();
00162 }
00163 
<a name="l00164"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#a5">00164</a> <font class="keywordtype">void</font> CBackgroundSource::stop()
00165 {
00166         <font class="keywordflow">if</font> (_Playing)
00167         {
00168                 CAudioMixerUser *mixer = CAudioMixerUser::instance();
00169                 mixer-&gt;unregisterUpdate(<font class="keyword">this</font>);
00170                 mixer-&gt;removeEvents(<font class="keyword">this</font>);
00171         
00172                 <font class="keywordflow">while</font> (!<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.empty())
00173                 {
00174                         TSubSource &amp;subSource = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.back();
00175                         <font class="keywordflow">if</font> (subSource.Source != NULL)
00176                         {
00177 <font class="comment">//                              subSource.Source-&gt;stop();</font>
00178                                 <font class="comment">//mixer-&gt;removeSource(subSource.Source);</font>
00179                                 <font class="keyword">delete</font> subSource.Source;
00180 
00181                         }
00182                         <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.pop_back();
00183                 }
00184         }
00185 
00186         CSourceCommon::stop();
00187 }
00188 
<a name="l00189"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#c1">00189</a> <font class="keywordtype">void</font> CBackgroundSource::onUpdate()
00190 {
00191         <font class="comment">// this is called for fade in/out.</font>
00192         CAudioMixerUser *mixer = CAudioMixerUser::instance();
00193         <font class="keywordtype">bool</font> doFade = <font class="keyword">false</font>;
00194         <a class="code" href="namespaceNLMISC.html#a183">TTime</a> now = <a class="code" href="classNLMISC_1_1CTime.html#d1">NLMISC::CTime::getLocalTime</a>();
00195         <font class="keywordtype">float</font> gain;
00196 
00197         vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00198         <font class="keywordflow">for</font> (; first != last; ++first)
00199         {
00200                 <font class="keywordflow">if</font> (first-&gt;Source != NULL)
00201                 {
00202                         <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u3">SUB_STATUS_FADEIN</a>)
00203                         {
00204                                 <font class="keywordflow">if</font> (first-&gt;FilterFadeIn &gt; 0)
00205                                         gain = (now - first-&gt;FadeStart) / float(first-&gt;FilterFadeIn);
00206                                 <font class="keywordflow">else</font>
00207                                         gain = 1.0f;
00208 
00209                                 <font class="keywordflow">if</font> (gain &lt; 1.0f)
00210                                 {
00211                                         first-&gt;Source-&gt;setRelativeGain(gain);
00212                                         doFade = <font class="keyword">true</font>;
00213                                 }
00214                                 <font class="keywordflow">else</font>
00215                                 {
00216                                         <font class="comment">// fade end</font>
00217                                         first-&gt;Source-&gt;setRelativeGain(1.0f * <a class="code" href="classNLSOUND_1_1CSourceCommon.html#n6">_Gain</a>);
00218                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u0">SUB_STATUS_PLAY</a>;
00219                                 }
00220                         }
00221                         <font class="keywordflow">else</font> <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u2">SUB_STATUS_FADEOUT</a>)
00222                         {
00223                                 <font class="keywordflow">if</font> (first-&gt;FilterFadeOut &gt; 0)
00224                                         gain = 1.0f - (now - first-&gt;FadeStart) / float(first-&gt;FilterFadeOut);
00225                                 <font class="keywordflow">else</font>
00226                                         gain = 0.0f;
00227                                 <font class="keywordflow">if</font> (gain &gt; 0.0f)
00228                                 {
00229                                         first-&gt;Source-&gt;setRelativeGain(gain * <a class="code" href="classNLSOUND_1_1CSourceCommon.html#n6">_Gain</a>);
00230                                         doFade = <font class="keyword">true</font>;
00231                                 }
00232                                 <font class="keywordflow">else</font>
00233                                 {
00234                                         first-&gt;Source-&gt;stop();
00235                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u1">SUB_STATUS_STOP</a>;
00236                                 }
00237                         }
00238                 }
00239         }
00240 
00241         <font class="comment">// any fade to update ?</font>
00242         <font class="keywordflow">if</font> (!doFade)
00243                 mixer-&gt;unregisterUpdate(<font class="keyword">this</font>);
00244 }
00245 
<a name="l00246"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#c2">00246</a> <font class="keywordtype">void</font> CBackgroundSource::onEvent()
00247 {
00248         <font class="comment">// check all sounds and test for start or stop.</font>
00249         CAudioMixerUser *mixer = CAudioMixerUser::instance();
00250 
00251         <font class="keywordtype">bool</font> doFade = <font class="keyword">false</font>;
00252         <a class="code" href="namespaceNLMISC.html#a183">TTime</a> now = <a class="code" href="classNLMISC_1_1CTime.html#d1">NLMISC::CTime::getLocalTime</a>();
00253 
00254         vector&lt;TSubSource&gt;::iterator first(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.begin()), last(<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o1">_Sources</a>.end());
00255         <font class="keywordflow">for</font> (; first != last; ++first)
00256         {
00257                 <font class="keywordflow">if</font> (first-&gt;Source != NULL)
00258                 {
00259                         <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CBackgroundSource.html#c0">checkFilter</a>(first-&gt;Filter))
00260                         {
00261                                 <font class="comment">// source ok</font>
00262                                 <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u1">SUB_STATUS_STOP</a>)
00263                                 {
00264                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u3">SUB_STATUS_FADEIN</a>;
00265                                         first-&gt;Source-&gt;setRelativeGain(0.0f);
00266                                         first-&gt;Source-&gt;setPos(<a class="code" href="classNLSOUND_1_1CSourceCommon.html#n3">_Position</a>);
00267                                         first-&gt;Source-&gt;play();
00268                                         first-&gt;FadeStart = now;
00269                                         doFade = <font class="keyword">true</font>;
00270                                 }
00271                                 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u2">SUB_STATUS_FADEOUT</a>)
00272                                 {
00273                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u3">SUB_STATUS_FADEIN</a>;
00274                                         <font class="comment">// Replace fade start date to smoosly reverse the fade.</font>
00275                                         first-&gt;FadeStart = now - (first-&gt;FadeStart - first-&gt;FilterFadeOut);
00276                                         doFade = <font class="keyword">true</font>;
00277                                 }
00278                         }
00279                         <font class="keywordflow">else</font>
00280                         {
00281                                 <font class="comment">// source masked.</font>
00282                                 <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u0">SUB_STATUS_PLAY</a>)
00283                                 {
00284                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u2">SUB_STATUS_FADEOUT</a>;
00285                                         first-&gt;FadeStart = now;
00286                                         doFade = <font class="keyword">true</font>;
00287                                 }
00288                                 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (first-&gt;Status == <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u3">SUB_STATUS_FADEIN</a>)
00289                                 {
00290                                         first-&gt;Status = <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#u4u2">SUB_STATUS_FADEOUT</a>;
00291                                         <font class="comment">// Replace fade start date to smoosly reverse the fade.</font>
00292                                         first-&gt;FadeStart = now - (first-&gt;FadeStart - first-&gt;FilterFadeIn);
00293                                         doFade = <font class="keyword">true</font>;
00294                                 }
00295                         }
00296                 }
00297         }
00298 
00299         <font class="keywordflow">if</font> (doFade)
00300         {
00301                 <font class="comment">// register for fade in/out</font>
00302                 mixer-&gt;registerUpdate(<font class="keyword">this</font>);
00303         }
00304 
00305         <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o2">_LastCheck</a> = <a class="code" href="classNLMISC_1_1CTime.html#d1">NLMISC::CTime::getLocalTime</a>();
00306 
00307         <font class="comment">// set the next event.</font>
00308         mixer-&gt;addEvent(<font class="keyword">this</font>, <a class="code" href="classNLSOUND_1_1CBackgroundSource.html#o2">_LastCheck</a> + <a class="code" href="namespaceNLSOUND.html#a19">ENV_CHK_INTERVAL</a>);
00309 }
00310 
00311 
<a name="l00312"></a><a class="code" href="classNLSOUND_1_1CBackgroundSource.html#c0">00312</a> <font class="keywordtype">bool</font> CBackgroundSource::checkFilter(<font class="keyword">const</font> UAudioMixer::TBackgroundFlags &amp;filter)
00313 {
00314         <font class="comment">// Get the current environnement from the bakgound sound manager.</font>
00315         <font class="keyword">const</font> UAudioMixer::TBackgroundFlags &amp;bg = CAudioMixerUser::instance()-&gt;getBackgroundSoundManager()-&gt;getBackgroundFlags();
00316 
00317         <font class="keywordtype">bool</font> ok = <font class="keyword">true</font>;
00318 
00319         <font class="keywordflow">for</font> (uint i=0; i&lt;16; ++i)
00320                 ok &amp;= filter.Flags[i] || !bg.Flags[i];
00321 
00322         <font class="keywordflow">return</font> ok;
00323 }
00324 
00325 
00326 } <font class="comment">// NLSOUND</font>
</pre></div>

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