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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>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> +</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> |