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<hr><h1>ambiant_source.cpp</h1><a href="ambiant__source_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000, 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">#error "Deprecated"</font>
00027 <font class="preprocessor"></font>
00028 <font class="preprocessor">#include "<a class="code" href="stdsound_8h.html">stdsound.h</a>"</font>
00029 
00030 <font class="preprocessor">#include "<a class="code" href="ambiant__source_8h.html">ambiant_source.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="sound_8h.html">sound.h</a>"</font>
00032 
00033 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00034 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00035 
00036 
00037 <font class="keyword">namespace </font>NLSOUND {
00038 
00039 
00040 <font class="comment">// If this flag is defined, one ambiant sound cannot be the next one to itself</font>
<a name="l00041"></a><a class="code" href="ambiant__source_8cpp.html#a0">00041</a> <font class="preprocessor">#define ENVSOUND_DONT_DUPLICATE_AMBIANT</font>
00042 <font class="preprocessor"></font>
00043 
00044 <font class="comment">/*</font>
00045 <font class="comment"> * Constructor</font>
00046 <font class="comment"> */</font>
<a name="l00047"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#a0">00047</a> CAmbiantSource::CAmbiantSource() : _Play(false),
00048                                                                    _StereoGain(0.0f),
00049                                                                    _Sustain(false),
00050                                                                    _RandomSoundChosen(false),
00051                                                                    _NextSparseSoundTime(0),
00052                                                                    _CrossfadeTime(4000),
00053                                                                    _SustainTime(8000),
00054                                                                    _SparseAvgPeriod(20000)
00055 {
00056         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>].setLooping( <font class="keyword">true</font> );
00057         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>].setLooping( <font class="keyword">true</font> );
00058         <font class="comment">//_StereoChannels[SPARSE_CH].setLooping( false );</font>
00059 
00060         srand( (uint32)CTime::getLocalTime() );
00061 }
00062 
00063 
00064 <font class="comment">/*</font>
00065 <font class="comment"> * Destructor</font>
00066 <font class="comment"> */</font>
<a name="l00067"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#a1">00067</a> CAmbiantSource::~CAmbiantSource()
00068 {
00069         CAudioMixerUser::instance()-&gt;removeMySource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>] );
00070         CAudioMixerUser::instance()-&gt;removeMySource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>] );
00071         CAudioMixerUser::instance()-&gt;removeMySource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>] );
00072 
00073         <font class="comment">// Delete sounds: now done in CAudioMixerUser::~CAudioMixerUser()</font>
00074         <font class="comment">/*vector&lt;CSound*&gt;::iterator ipsnds;</font>
00075 <font class="comment">        for ( ipsnds=_AmbiantSounds.begin(); ipsnds!=_AmbiantSounds.end(); ++ipsnds )</font>
00076 <font class="comment">        {</font>
00077 <font class="comment">                nldebug( "Deleting ambiant sound" );</font>
00078 <font class="comment">                delete (*ipsnds);</font>
00079 <font class="comment">        }</font>
00080 <font class="comment">        for ( ipsnds=_SparseSounds.begin(); ipsnds!=_SparseSounds.end(); ++ipsnds )</font>
00081 <font class="comment">        {</font>
00082 <font class="comment">                nldebug( "Deleting sparse sound" );</font>
00083 <font class="comment">                delete (*ipsnds);</font>
00084 <font class="comment">        }</font>
00085 <font class="comment">        */</font>
00086 }
00087 
00088 
00089 <font class="comment">/* Init. You can pass a position vector to link to (if the playable has stereo source(s))</font>
00090 <font class="comment"> * When reading from a stream, call init() *after* serial().</font>
00091 <font class="comment"> */</font>
00092 <font class="keywordtype">void</font> CAmbiantSource::initPos( <font class="keyword">const</font> CVector *posvector )
00093 {
00094         <font class="comment">// Initialize ambiant sound channels</font>
00095         <font class="keywordflow">if</font> ( ! <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a>.empty()  )
00096         {
00097                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>].set3DPositionVector( posvector );
00098                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>].setSound( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a> ) );
00099                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>].setGain( 0.0f );
00100                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a>);
00101                 CAudioMixerUser::instance()-&gt;addSource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>] );
00102                 CAudioMixerUser::instance()-&gt;giveTrack( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>] );
00103                 
00104                 <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a>.size() &gt; 1 )
00105                 {
00106                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>].set3DPositionVector( posvector );
00107                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>].setSound( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a> ) );
00108                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>].setGain( 0.0f );
00109                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a>);
00110                         CAudioMixerUser::instance()-&gt;addSource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>] );
00111                         CAudioMixerUser::instance()-&gt;giveTrack( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a2">AMBIANT_CH2</a>] );
00112                 }
00113         }
00114 
00115         <font class="comment">// Initialize sparse sounds channel</font>
00116         <font class="keywordflow">if</font> ( ! <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o4">_SparseSounds</a>.empty() )
00117         {
00118                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].set3DPositionVector( posvector );
00119                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a> );
00120                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setSound( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o4">_SparseSounds</a> ) );
00121                 CAudioMixerUser::instance()-&gt;addSource( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>] );
00122                 CAudioMixerUser::instance()-&gt;giveTrack( &amp;<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>] );
00123         }
00124 }
00125 
00126 
00127 <font class="comment">/*</font>
00128 <font class="comment"> * Enable (play with high priority) and set general gain, or disable (stop and set low priority).</font>
00129 <font class="comment"> */</font>
<a name="l00130"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#a4">00130</a> <font class="keywordtype">void</font>                    CAmbiantSource::enable( <font class="keywordtype">bool</font> toplay, <font class="keywordtype">float</font> gain )
00131 {
00132         <font class="comment">// Calc position in cycle</font>
00133         <font class="keywordtype">bool</font> crossfade;
00134         uint32 leadchannel;
00135         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a>.size() &gt; 1 )
00136         {
00137                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b0">calcPosInCycle</a>( crossfade, leadchannel );
00138         }
00139         <font class="keywordflow">else</font>
00140         {
00141                 crossfade = <font class="keyword">false</font>;
00142                 leadchannel = <a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>;
00143         }
00144 
00145         <font class="comment">// Enable/disable</font>
00146         <font class="keywordflow">if</font> ( toplay )
00147         {
00148                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a> = gain;
00149 
00150                 <font class="keywordflow">if</font> ( ! <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o0">_Play</a> )
00151                 {
00152                         <font class="comment">// Start lead channel</font>
00153                         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].getSound() != NULL )
00154                         {
00155                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Envsound: Switch on channel %u"</font>, leadchannel );
00156                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a11">HighPri</a> ) ;
00157                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].play();
00158                         }
00159 
00160                         <font class="comment">// If crossfading, start back channel</font>
00161                         <font class="keywordflow">if</font> ( crossfade &amp;&amp; (<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].getSound() != NULL) )
00162                         {
00163                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Envsound: Switch on channel %u"</font>, 1-leadchannel );
00164                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a11">HighPri</a> ) ;
00165                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].play();
00166                         }
00167 
00168                         <font class="comment">// Calc when the next spare sound will play</font>
00169                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b2">calcRandomSparseSoundTime</a>( NULL );
00170 
00171                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o0">_Play</a> = <font class="keyword">true</font>;
00172                 }
00173                 <font class="comment">// The SPARSE_CH is added only when needed</font>
00174         }
00175         <font class="keywordflow">else</font>
00176         {
00177                 <font class="keywordflow">if</font> ( _Play )
00178                 {
00179                         <font class="comment">// Stop lead channel</font>
00180                         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].getSound() != NULL )
00181                         {
00182                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Envsound: Switch off channel %u"</font>, leadchannel );
00183                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].stop();
00184                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a> );
00185                         }
00186 
00187                         <font class="comment">// If crossfading, stop back channel</font>
00188                         <font class="keywordflow">if</font> ( crossfade &amp;&amp; (<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].getSound() != NULL) )
00189                         {
00190                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Envsound: Switch off channel %u"</font>, 1-leadchannel );
00191                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].stop();
00192                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[1-leadchannel].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a> );
00193                         }
00194 
00195                         <font class="comment">// Stop spare channel, anyway</font>
00196                         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].getSound() != NULL )
00197                         {
00198                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Envsound: Switch off sparse channel"</font> );
00199                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].stop();
00200                                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a13">LowPri</a> );
00201                         }
00202 
00203                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o0">_Play</a> = <font class="keyword">false</font>;
00204                 }
00205         }
00206 }
00207 
00208 
00209 <font class="comment">/*</font>
00210 <font class="comment"> * Calc pos in cycle</font>
00211 <font class="comment"> */</font>
<a name="l00212"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b0">00212</a> <a class="code" href="namespaceNLMISC.html#a183">TTime</a> CAmbiantSource::calcPosInCycle( <font class="keywordtype">bool</font>&amp; crossfade, uint32&amp; leadchannel )
00213 {
00214         <a class="code" href="namespaceNLMISC.html#a183">TTime</a> pos = CTime::getLocalTime();
00215         uint32 cycletime = <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o9">_CrossfadeTime</a> + <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o10">_SustainTime</a>;
00216         pos = pos % (cycletime*2);
00217 
00218         <font class="comment">// Calc which channel will be the lead one</font>
00219         <font class="keywordflow">if</font> ( pos &lt; cycletime )
00220         {
00221                 leadchannel = 0;
00222         }
00223         <font class="keywordflow">else</font>
00224         {
00225                 leadchannel = 1;
00226                 pos = pos - (cycletime);
00227         }
00228 
00229         <font class="comment">// Calc if the pos is in the first part (crossfade) or in the other part (sustain)</font>
00230         crossfade = ( pos &lt; <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o9">_CrossfadeTime</a> );
00231         
00232         <font class="keywordflow">return</font> pos;
00233 }
00234 
00235 
00236 <font class="comment">/*</font>
00237 <font class="comment"> * Update the stereo mix (call evenly)</font>
00238 <font class="comment"> */</font>
<a name="l00239"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#a3">00239</a> <font class="keywordtype">void</font> CAmbiantSource::update()
00240 {
00241         <font class="keywordflow">if</font> ( (!<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o0">_Play</a>) || (<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a>==0.0f) )
00242         {
00243                 <font class="keywordflow">return</font>;
00244         }
00245 
00246         <font class="comment">// Calc pos in cycle</font>
00247         <font class="keywordtype">bool</font> crossfade;
00248         uint32 leadchannel, backchannel=0;
00249         <a class="code" href="namespaceNLMISC.html#a183">TTime</a> posInCycle=0;
00250         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a>.size() &gt; 1 )
00251         {
00252                 posInCycle = <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b0">calcPosInCycle</a>( crossfade, leadchannel );
00253                 backchannel = 1 - leadchannel;
00254         }
00255         <font class="keywordflow">else</font>
00256         {
00257                 <font class="comment">// If there is less than 2 sounds, no crossfade, always sustain (a single sound must be looping)</font>
00258                 crossfade = <font class="keyword">false</font>;
00259                 leadchannel = <a class="code" href="env__sound__user_8h.html#a1">AMBIANT_CH1</a>;
00260                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o6">_Sustain</a> = <font class="keyword">true</font>;
00261         }
00262         
00263         <font class="comment">// Crossfade the first two sources</font>
00264         <font class="keywordflow">if</font> ( crossfade )
00265         {
00266                 <font class="comment">// Attack</font>
00267                 <font class="keywordtype">float</font> ratio = (float)posInCycle / (float)<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o9">_CrossfadeTime</a>;
00268                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].setRelativeGain( ratio*<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a> );
00269                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[backchannel].setRelativeGain( (1.0f - ratio)*<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a> );
00270 
00271                 <font class="comment">// Start next sound</font>
00272                 <font class="keywordflow">if</font> ( _Sustain )
00273                 {
00274                         <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Beginning crossfade: channel #%u rising"</font>, leadchannel );
00275                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a11">HighPri</a> ) ;
00276                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].play();
00277                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o6">_Sustain</a> = <font class="keyword">false</font>;
00278                 }
00279         }
00280         <font class="keywordflow">else</font>
00281         {
00282                 <font class="comment">// Set sustain gain (takes into account the possible changes to _StereoGain)</font>
00283                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].setRelativeGain( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a> );
00284 
00285                 <font class="comment">// Prepare next ambiant sound</font>
00286                 <font class="keywordflow">if</font> ( ! <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o6">_Sustain</a> )
00287                 {
00288                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o6">_Sustain</a> = <font class="keyword">true</font>;
00289                         <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a> nextsound = <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a> );
00290 <font class="preprocessor">#ifdef ENVSOUND_DONT_DUPLICATE_AMBIANT</font>
00291 <font class="preprocessor"></font>                        <a class="code" href="debug_8h.html#a6">nlassert</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a>.size() &gt; 1 ); <font class="comment">// or infinite loop</font>
00292                         <font class="keywordflow">while</font> ( nextsound == <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[leadchannel].getSound() )
00293                         {
00294                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Avoiding ambiant sound duplication..."</font> );
00295                                 nextsound = <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a> );
00296                         }
00297 <font class="preprocessor">#endif</font>
00298 <font class="preprocessor"></font>                        <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Sustain: channel #1"</font> );
00299                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[backchannel].setRelativeGain( 0.0f );
00300                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[backchannel].stop(); <font class="comment">// we don't set the priority to LowPri</font>
00301                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[backchannel].setSound( nextsound );
00302                 }
00303         }
00304 
00305         <font class="comment">// Add a short random sound into the third source</font>
00306         <font class="keywordflow">if</font> ( ! <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o4">_SparseSounds</a>.empty() )
00307         {
00308                 <font class="comment">// Set sustain gain (takes into account the possible changes to _StereoGain)</font>
00309                 <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setRelativeGain( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o2">_StereoGain</a> );
00310 
00311                 <font class="comment">// Start next sparse sound</font>
00312                 <a class="code" href="namespaceNLMISC.html#a183">TTime</a> now = CTime::getLocalTime();
00313                 <font class="keywordflow">if</font> ( now &gt; <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o8">_NextSparseSoundTime</a> )
00314                 {
00315                         <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a> nextsound = <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">getRandomSound</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o4">_SparseSounds</a> );
00316                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].stop();
00317                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setSound( nextsound );
00318                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].setPriority( <a class="code" href="namespaceNLSOUND.html#a82a12">MidPri</a> );
00319                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].play();
00320                         <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Playing sparse sound"</font> );
00321                         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].getTrack() == NULL )
00322                         {
00323                                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: Ensound: Switch on sparse channel"</font> );
00324                                 <a class="code" href="debug_8h.html#a6">nlassert</a>( <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o1">_StereoChannels</a>[<a class="code" href="env__sound__user_8h.html#a3">SPARSE_CH</a>].getSound() != NULL );
00325                         }
00326                         <font class="comment">// Does not leave the track</font>
00327                         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b2">calcRandomSparseSoundTime</a>( nextsound );
00328                 }
00329         }
00330 }
00331 
00332 
00333 <font class="comment">/*</font>
00334 <font class="comment"> * Select a random sound in a bank</font>
00335 <font class="comment"> */</font>
<a name="l00336"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b1">00336</a> <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a>        CAmbiantSource::getRandomSound( <font class="keyword">const</font> std::vector&lt;CSound*&gt;&amp; bank )<font class="keyword"> const</font>
00337 <font class="keyword"></font>{
00338         <a class="code" href="debug_8h.html#a6">nlassert</a>( ! bank.empty() );
00339         <font class="comment">// Note: does not work with a very big size (rand()*bank.size() would overflow)</font>
00340         uint32 <a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a> = rand()*bank.size()/(RAND_MAX+1);
00341         <a class="code" href="debug_8h.html#a6">nlassert</a>( <a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a> &lt; bank.size() );
00342         <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Prepared random sound number %u of %u"</font>, <a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a>, bank.size()-1 );
00343 
00344         <font class="keywordflow">return</font> bank[<a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a>];
00345 }
00346 
00347 
00348 
00349 
00350 <font class="comment">/*</font>
00351 <font class="comment"> * Calculate the next time a sparse sound plays</font>
00352 <font class="comment"> */</font>
<a name="l00353"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#b2">00353</a> <font class="keywordtype">void</font>            CAmbiantSource::calcRandomSparseSoundTime( <a class="code" href="namespaceNLSOUND.html#a8">TSoundId</a> currentsparesound )
00354 {
00355         uint32 delay = (uint)((float)rand() * (float)(<a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o11">_SparseAvgPeriod</a>*2) / (float)RAND_MAX);
00356 
00357         <font class="comment">// Check the next sound will play after the current one</font>
00358         <font class="keywordflow">if</font> ( currentsparesound != NULL )
00359         {
00360                 uint32 soundlength = currentsparesound-&gt;getDuration();
00361                 <font class="keywordflow">if</font> ( delay &lt;= soundlength )
00362                 {
00363                         delay = soundlength+1;
00364                 }
00365         }
00366 
00367         <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"AM: EnvSound: Next sparse sound will play in %u ms"</font>, delay );
00368         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o8">_NextSparseSoundTime</a> = CTime::getLocalTime() + delay;
00369 }
00370 
00371 
00372 <font class="comment">/*</font>
00373 <font class="comment"> * Serialize</font>
00374 <font class="comment"> */</font>
00375 <font class="comment">/*</font>
00376 <font class="comment">void                                    CAmbiantSource::serial( NLMISC::IStream&amp; s )</font>
00377 <font class="comment">{</font>
00378 <font class="comment">        // If you change this, increment the version number in CEnvSoundUser::load() !</font>
00379 <font class="comment"></font>
00380 <font class="comment">        // Constants</font>
00381 <font class="comment">        s.serial( _CrossfadeTime );</font>
00382 <font class="comment">        s.serial( _SustainTime );</font>
00383 <font class="comment">        s.serial( _SparseAvgPeriod );</font>
00384 <font class="comment"></font>
00385 <font class="comment">        // Stereo sound banks (sounds allocated here once per pointer, deleted by CAudioMixerUser::~CAudioMixerUser())</font>
00386 <font class="comment">        s.serialContPtr( _AmbiantSounds );</font>
00387 <font class="comment">        s.serialContPtr( _SparseSounds );</font>
00388 <font class="comment"></font>
00389 <font class="comment">        // Register within the audio mixer for deletion at the end</font>
00390 <font class="comment">        vector&lt;CSound*&gt;::iterator ips;</font>
00391 <font class="comment">        for ( ips=_AmbiantSounds.begin(); ips!=_AmbiantSounds.end(); ++ips )</font>
00392 <font class="comment">        {</font>
00393 <font class="comment">                CAudioMixerUser::instance()-&gt;addAmbiantSound( (*ips) );</font>
00394 <font class="comment">        }</font>
00395 <font class="comment">        for ( ips=_SparseSounds.begin(); ips!=_SparseSounds.end(); ++ips )</font>
00396 <font class="comment">        {</font>
00397 <font class="comment">                CAudioMixerUser::instance()-&gt;addAmbiantSound( (*ips) );</font>
00398 <font class="comment">        }</font>
00399 <font class="comment">}</font>
00400 <font class="comment"></font>
00401 <font class="comment">*/</font>
00402 
00403 <font class="comment">/*</font>
00404 <font class="comment"> * Set properties (EDIT)</font>
00405 <font class="comment"> */</font>
<a name="l00406"></a><a class="code" href="classNLSOUND_1_1CAmbiantSource.html#a6">00406</a> <font class="keywordtype">void</font>            CAmbiantSource::setProperties( std::vector&lt;TSoundId&gt;&amp; ambiantsounds,
00407                                                                                    std::vector&lt;TSoundId&gt;&amp; sparsesounds,
00408                                                                                    uint32 crossfadeTimeMs, uint32 sustainTimeMs,
00409                                                                                    uint32 sparseAvgPeriodMs )
00410 {
00411         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o3">_AmbiantSounds</a> = ambiantsounds;
00412         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o4">_SparseSounds</a> = sparsesounds;
00413         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o9">_CrossfadeTime</a> = crossfadeTimeMs;
00414         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o10">_SustainTime</a> = sustainTimeMs;
00415         <a class="code" href="classNLSOUND_1_1CAmbiantSource.html#o11">_SparseAvgPeriod</a> = sparseAvgPeriodMs;
00416 }
00417 
00418 
00419 } <font class="comment">// NLSOUND</font>
</pre></div>

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