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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>buffer_al.cpp</h1><a href="buffer__al_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="stdopenal_8h.html">stdopenal.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="buffer__al_8h.html">buffer_al.h</a>"</font> +00029 +00030 <font class="keyword">namespace </font>NLSOUND { +00031 +00032 +00033 <font class="comment">/*</font> +00034 <font class="comment"> * Constructor</font> +00035 <font class="comment"> */</font> +<a name="l00036"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a0">00036</a> CBufferAL::CBufferAL( ALuint buffername ) : +00037 IBuffer(), _BufferName(buffername), _SampleFormat(AL_INVALID), _Frequency(0) +00038 { +00039 } +00040 +00041 +00042 <font class="comment">/*</font> +00043 <font class="comment"> * Destructor</font> +00044 <font class="comment"> */</font> +<a name="l00045"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a1">00045</a> CBufferAL::~CBufferAL() +00046 { +00047 CSoundDriverAL *sdal = CSoundDriverAL::instance(); +00048 <font class="comment">//nlinfo( "Deleting buffer (name %u)", _BufferName );</font> +00049 sdal->removeBuffer( <font class="keyword">this</font> ); +00050 } +00051 +<a name="l00052"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a14">00052</a> <font class="keywordtype">void</font> CBufferAL::presetName(<font class="keyword">const</font> std::string &bufferName) +00053 { +00054 <a class="code" href="classNLSOUND_1_1CBufferAL.html#o1">_Name</a> = <a class="code" href="classNLSOUND_1_1CBufferAL.html#a11">bufferName</a>; +00055 } +00056 +00057 +00058 <font class="comment">/*</font> +00059 <font class="comment"> * Return the size of the buffer, in bytes</font> +00060 <font class="comment"> */</font> +<a name="l00061"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a4">00061</a> uint32 CBufferAL::getSize()<font class="keyword"> const</font> +00062 <font class="keyword"></font>{ +00063 ALint <a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>; +00064 alGetBufferi( <a class="code" href="classNLSOUND_1_1CBufferAL.html#o0">_BufferName</a>, AL_SIZE, &<a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a> ); +00065 <a class="code" href="debug_8h.html#a6">nlassert</a>( alGetError() == AL_NO_ERROR ); +00066 <font class="keywordflow">return</font> <a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>; +00067 } +00068 +00069 +00070 <font class="comment">/*</font> +00071 <font class="comment"> * Return true if the buffer is stereo, false if mono</font> +00072 <font class="comment"> */</font> +<a name="l00073"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a6">00073</a> <font class="keywordtype">bool</font> CBufferAL::isStereo()<font class="keyword"> const</font> +00074 <font class="keyword"></font>{ +00075 <font class="keywordflow">return</font> (<a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a>==AL_FORMAT_STEREO8) || (<a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a>==AL_FORMAT_STEREO16); +00076 } +00077 +00078 +00079 <font class="comment">/*</font> +00080 <font class="comment"> * Return the format and frequency</font> +00081 <font class="comment"> */</font> +<a name="l00082"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a7">00082</a> <font class="keywordtype">void</font> CBufferAL::getFormat( <a class="code" href="namespaceNLSOUND.html#a83">TSampleFormat</a>& <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>, uint& freq )<font class="keyword"> const</font> +00083 <font class="keyword"></font>{ +00084 <font class="keywordflow">switch</font> ( _SampleFormat ) +00085 { +00086 <font class="keywordflow">case</font> AL_FORMAT_MONO8 : <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a> = <a class="code" href="namespaceNLSOUND.html#a83a21">Mono8</a>; <font class="keywordflow">break</font>; +00087 <font class="keywordflow">case</font> AL_FORMAT_MONO16 : <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a> = <a class="code" href="namespaceNLSOUND.html#a83a22">Mono16</a>; <font class="keywordflow">break</font>; +00088 <font class="keywordflow">case</font> AL_FORMAT_STEREO8 : <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a> = <a class="code" href="namespaceNLSOUND.html#a83a23">Stereo8</a>; <font class="keywordflow">break</font>; +00089 <font class="keywordflow">case</font> AL_FORMAT_STEREO16 : <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a> = <a class="code" href="namespaceNLSOUND.html#a83a24">Stereo16</a>; <font class="keywordflow">break</font>; +00090 <font class="keywordflow">default</font> : <a class="code" href="debug_8h.html#a12">nlstop</a>; +00091 } +00092 freq = <a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a>; +00093 } +00094 +00095 +00096 <font class="comment">/*</font> +00097 <font class="comment"> * Return the duration (in ms) of the sample in the buffer</font> +00098 <font class="comment"> */</font> +<a name="l00099"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a5">00099</a> <font class="keywordtype">float</font> CBufferAL::getDuration()<font class="keyword"> const</font> +00100 <font class="keyword"></font>{ +00101 <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a> == 0 ) +00102 { +00103 <font class="keywordflow">return</font> 0; +00104 } +00105 uint32 bytespersample; +00106 <font class="keywordflow">switch</font> ( _SampleFormat ) +00107 { +00108 <font class="keywordflow">case</font> AL_FORMAT_MONO8 : bytespersample = 1; <font class="keywordflow">break</font>; +00109 <font class="keywordflow">case</font> AL_FORMAT_MONO16 : bytespersample = 2; <font class="keywordflow">break</font>; +00110 <font class="keywordflow">case</font> AL_FORMAT_STEREO8 : bytespersample = 2; <font class="keywordflow">break</font>; +00111 <font class="keywordflow">case</font> AL_FORMAT_STEREO16 : bytespersample = 4; <font class="keywordflow">break</font>; +00112 <font class="keywordflow">default</font> : <font class="keywordflow">return</font> 0; +00113 } +00114 <font class="keywordflow">return</font> (float)(<a class="code" href="classNLSOUND_1_1CBufferAL.html#a4">getSize</a>()) * 1000.0f / (float)<a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a> / (float)bytespersample; +00115 } +00116 +00117 +00118 <font class="comment">/*</font> +00119 <font class="comment"> * Set the sample format. Example: freq=44100</font> +00120 <font class="comment"> */</font> +<a name="l00121"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a2">00121</a> <font class="keywordtype">void</font> CBufferAL::setFormat( <a class="code" href="namespaceNLSOUND.html#a83">TSampleFormat</a> <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>, uint freq ) +00122 { +00123 <font class="keywordflow">switch</font> ( format ) +00124 { +00125 <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a21">Mono8</a> : <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> = AL_FORMAT_MONO8; <font class="keywordflow">break</font>; +00126 <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a22">Mono16</a> : <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> = AL_FORMAT_MONO16; <font class="keywordflow">break</font>; +00127 <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a23">Stereo8</a> : <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> = AL_FORMAT_STEREO8; <font class="keywordflow">break</font>; +00128 <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a24">Stereo16</a> : <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> = AL_FORMAT_STEREO16; <font class="keywordflow">break</font>; +00129 <font class="keywordflow">default</font> : <a class="code" href="debug_8h.html#a12">nlstop</a>; <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> = AL_INVALID; +00130 } +00131 <a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a> = freq; +00132 } +00133 +00134 +00135 <font class="comment">/*</font> +00136 <font class="comment"> * Set the buffer size and fill the buffer. Return true if ok.</font> +00137 <font class="comment"> */</font> +<a name="l00138"></a><a class="code" href="classNLSOUND_1_1CBufferAL.html#a3">00138</a> <font class="keywordtype">bool</font> CBufferAL::fillBuffer( <font class="keywordtype">void</font> *<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, uint32 bufsize ) +00139 { +00140 <a class="code" href="debug_8h.html#a6">nlassert</a>( <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a> != NULL ); +00141 <a class="code" href="debug_8h.html#a6">nlassert</a>( (<a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a> != AL_INVALID) && (<a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a> != 0 ) ); +00142 +00143 <font class="comment">// Fill buffer</font> +00144 alBufferData( <a class="code" href="classNLSOUND_1_1CBufferAL.html#o0">_BufferName</a>, <a class="code" href="classNLSOUND_1_1CBufferAL.html#o2">_SampleFormat</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, bufsize, <a class="code" href="classNLSOUND_1_1CBufferAL.html#o3">_Frequency</a> ); +00145 +00146 <font class="comment">// Error handling</font> +00147 <font class="keywordflow">return</font> ( alGetError() == AL_NO_ERROR ); +00148 } +00149 +00150 +00151 } <font class="comment">// NLSOUND</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |