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<hr><h1>sound_driver.cpp</h1><a href="sound__driver_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="sound__driver_8h.html">sound/driver/sound_driver.h</a>"</font>
00027 <font class="preprocessor">#include "<a class="code" href="debug_8h.html">nel/misc/debug.h</a>"</font>
00028
00029
00030 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00031 <font class="preprocessor"></font>
00032 <font class="preprocessor">#include <windows.h></font>
00033
00034 <font class="preprocessor">#else // NL_OS_WINDOWS</font>
00035 <font class="preprocessor"></font>
00036 <font class="preprocessor">#include <dlfcn.h></font>
00037
00038 <font class="preprocessor">#endif // NL_OS_WINDOWS</font>
00039 <font class="preprocessor"></font>
00040
00041 <font class="keyword">namespace </font>NLSOUND
00042 {
00043
00044
00045 <font class="comment">// Interface version</font>
<a name="l00046"></a><a class="code" href="classNLSOUND_1_1ISoundDriver.html#p0">00046</a> <font class="keyword">const</font> uint32 ISoundDriver::InterfaceVersion = 0x04;
00047
00048 <font class="keyword">typedef</font> ISoundDriver* (*ISDRV_CREATE_PROC)(void);
00049 <font class="keyword">const</font> <font class="keywordtype">char</font> *<a class="code" href="namespaceNLSOUND.html#a39">IDRV_CREATE_PROC_NAME</a> = <font class="stringliteral">"NLSOUND_createISoundDriverInstance"</font>;
00050
00051 <font class="keyword">typedef</font> <a class="code" href="memory__common_8h.html#a11">uint32</a> (*<a class="code" href="namespaceNLSOUND.html#a40">ISDRV_VERSION_PROC</a>)(void);
00052 <font class="keyword">const</font> <font class="keywordtype">char</font> *<a class="code" href="namespaceNLSOUND.html#a41">IDRV_VERSION_PROC_NAME</a> = <font class="stringliteral">"NLSOUND_interfaceVersion"</font>;
00053
00054
00055
00056 <font class="comment">/*</font>
00057 <font class="comment"> * The static method which builds the sound driver instance</font>
00058 <font class="comment"> */</font>
<a name="l00059"></a><a class="code" href="classNLSOUND_1_1ISoundDriver.html#d0">00059</a> ISoundDriver *ISoundDriver::createDriver()
00060 {
00061 <a class="code" href="namespaceNLSOUND.html#a38">ISDRV_CREATE_PROC</a> createSoundDriver = NULL;
00062 <a class="code" href="namespaceNLSOUND.html#a40">ISDRV_VERSION_PROC</a> versionDriver = NULL;
00063
00064 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00065 <font class="preprocessor"></font>
00066 <font class="comment">// WINDOWS code.</font>
00067 HINSTANCE hInst;
00068
00069 hInst = LoadLibrary(NLSOUND_DLL_NAME);
00070
00071 <font class="keywordflow">if</font> (!hInst)
00072 {
00073 <font class="keywordflow">throw</font> ESoundDriverNotFound();
00074 }
00075
00076 <font class="keywordtype">char</font> buffer[1024], *ptr;
00077 SearchPath (NULL, NLSOUND_DLL_NAME, NULL, 1023, buffer, &ptr);
00078 <a class="code" href="debug_8h.html#a1">nlinfo</a> (<font class="stringliteral">"Using the library '"</font>NLSOUND_DLL_NAME<font class="stringliteral">"' that is in the directory: '%s'"</font>, buffer);
00079
00080 createSoundDriver = (ISDRV_CREATE_PROC) GetProcAddress (hInst, <a class="code" href="namespaceNLSOUND.html#a39">IDRV_CREATE_PROC_NAME</a>);
00081 <font class="keywordflow">if</font> (createSoundDriver == NULL)
00082 {
00083 <a class="code" href="debug_8h.html#a1">nlinfo</a>( <font class="stringliteral">"Error: %u"</font>, GetLastError() );
00084 <font class="keywordflow">throw</font> ESoundDriverCorrupted();
00085 }
00086
00087 versionDriver = (ISDRV_VERSION_PROC) GetProcAddress (hInst, <a class="code" href="namespaceNLSOUND.html#a41">IDRV_VERSION_PROC_NAME</a>);
00088 <font class="keywordflow">if</font> (versionDriver != NULL)
00089 {
00090 <font class="keywordflow">if</font> (versionDriver()<ISoundDriver::InterfaceVersion)
00091 <font class="keywordflow">throw</font> ESoundDriverOldVersion();
00092 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (versionDriver()>ISoundDriver::InterfaceVersion)
00093 <font class="keywordflow">throw</font> ESoundDriverUnknownVersion();
00094 }
00095
00096 <font class="preprocessor">#elif defined (NL_OS_UNIX)</font>
00097 <font class="preprocessor"></font>
00098 <font class="comment">// Unix code</font>
00099 <font class="keywordtype">void</font> *handle = dlopen(NLSOUND_DLL_NAME, RTLD_NOW);
00100
00101 <font class="keywordflow">if</font> (handle == NULL)
00102 {
00103 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"when loading dynamic library '%s': %s"</font>, NLSOUND_DLL_NAME, dlerror());
00104 <font class="keywordflow">throw</font> ESoundDriverNotFound();
00105 }
00106
00107 <font class="comment">/* Not ANSI. Might produce a warning */</font>
00108 createSoundDriver = (ISDRV_CREATE_PROC) dlsym (handle, <a class="code" href="namespaceNLSOUND.html#a39">IDRV_CREATE_PROC_NAME</a>);
00109 <font class="keywordflow">if</font> (createSoundDriver == NULL)
00110 {
00111 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"when getting function in dynamic library '%s': %s"</font>, NLSOUND_DLL_NAME, dlerror());
00112 <font class="keywordflow">throw</font> ESoundDriverCorrupted();
00113 }
00114
00115 versionDriver = (ISDRV_VERSION_PROC) dlsym (handle, <a class="code" href="namespaceNLSOUND.html#a41">IDRV_VERSION_PROC_NAME</a>);
00116 <font class="keywordflow">if</font> (versionDriver != NULL)
00117 {
00118 <font class="keywordflow">if</font> (versionDriver()<ISoundDriver::InterfaceVersion)
00119 <font class="keywordflow">throw</font> ESoundDriverOldVersion();
00120 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (versionDriver()>ISoundDriver::InterfaceVersion)
00121 <font class="keywordflow">throw</font> ESoundDriverUnknownVersion();
00122 }
00123
00124 <font class="preprocessor">#else // NL_OS_LINUX</font>
00125 <font class="preprocessor"></font><font class="preprocessor">#error "Dynamic DLL loading not implemented!"</font>
00126 <font class="preprocessor"></font><font class="preprocessor">#endif // NL_OS_LINUX</font>
00127 <font class="preprocessor"></font>
00128 <a class="code" href="classNLSOUND_1_1ISoundDriver.html#b0">ISoundDriver</a> *ret = createSoundDriver();
00129 <font class="keywordflow">if</font> ( ret == NULL )
00130 {
00131 <font class="keywordflow">throw</font> ESoundDriverCantCreateDriver();
00132 }
00133 <font class="keywordflow">return</font> ret;
00134 }
00135
00136
00137 } <font class="comment">// NLSOUND</font>
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