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<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>
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