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<hr><h1>sound_driver_dsound.cpp</h1><a href="sound__driver__dsound_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 
00027 <font class="comment">// The one and only INITGUID</font>
<a name="l00028"></a><a class="code" href="sound__driver__dsound_8cpp.html#a0">00028</a> <font class="preprocessor">#define INITGUID</font>
00029 <font class="preprocessor"></font>
00030 <font class="preprocessor">#include "<a class="code" href="stddsound_8h.html">stddsound.h</a>"</font>
00031 
00032 
00033 <font class="preprocessor">#include "<a class="code" href="sound__driver__dsound_8h.html">sound_driver_dsound.h</a>"</font>
00034 <font class="preprocessor">#include "<a class="code" href="listener__dsound_8h.html">listener_dsound.h</a>"</font>
00035 <font class="preprocessor">#include &lt;math.h&gt;</font>
00036 
00037 
00038 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00039 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00040 
00041 
00042 <font class="keyword">namespace </font>NLSOUND {
00043 
<a name="l00044"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r0">00044</a> CSoundDriverDSound* CSoundDriverDSound::_Instance = NULL;
<a name="l00045"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r1">00045</a> uint32 CSoundDriverDSound::_TimerPeriod = 100;
00046 HINSTANCE <a class="code" href="namespaceNLSOUND.html#a25">CSoundDriverDllHandle</a> = 0;
00047 HWND <a class="code" href="namespaceNLSOUND.html#a26">CSoundDriverWnd</a> = 0;
00048 
00049 
00050 <font class="comment">// ******************************************************************</font>
00051 <font class="comment">// The main entry of the DLL. It's used to get a hold of the hModule handle.</font>
00052 
00053 BOOL WINAPI <a class="code" href="namespaceNLSOUND.html#a76">DllMain</a>(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
00054 {
00055   <a class="code" href="namespaceNLSOUND.html#a25">CSoundDriverDllHandle</a> = (HINSTANCE) hModule;
00056   <font class="keywordflow">return</font> TRUE;
00057 }
00058 
00059 
00060 <font class="comment">// ******************************************************************</font>
00061 <font class="comment">// The event handling procedure of the invisible window created below. </font>
00062 
00063 <font class="keywordtype">long</font> FAR PASCAL <a class="code" href="namespaceNLSOUND.html#a77">CSoundDriverCreateWindowProc</a>(HWND hWnd, <font class="keywordtype">unsigned</font> message, WPARAM wParam, LPARAM lParam)
00064 {
00065     <font class="keywordflow">return</font> DefWindowProc(hWnd, message, wParam, lParam);
00066 }
00067 
00068 <font class="comment">// ******************************************************************</font>
00069 
00070 <a class="code" href="namespaceNLSOUND.html#a78">__declspec</a>(dllexport) ISoundDriver *NLSOUND_createISoundDriverInstance()
00071 {
00072         <font class="keyword">static</font> <font class="keywordtype">bool</font> Registered = <font class="keyword">false</font>;
00073 
00074         <font class="keywordflow">if</font> (!Registered)
00075         {
00076                 <font class="comment">// Don't ask me why we have to create a window to do sound!</font>
00077                 <font class="comment">// echo &lt;your comment&gt; | mail support@microsoft.com -s "F#%@cking window"</font>
00078                 WNDCLASS myClass;
00079                 myClass.hCursor = LoadCursor( NULL, IDC_ARROW );
00080                 myClass.hIcon = NULL; 
00081                 myClass.lpszMenuName = (LPSTR) NULL;
00082                 myClass.lpszClassName = (LPSTR) <font class="stringliteral">"CSoundDriver"</font>;
00083                 myClass.hbrBackground = (HBRUSH)(COLOR_WINDOW);
00084                 myClass.hInstance = <a class="code" href="namespaceNLSOUND.html#a25">CSoundDriverDllHandle</a>;
00085                 myClass.style = CS_GLOBALCLASS;
00086                 myClass.lpfnWndProc = <a class="code" href="namespaceNLSOUND.html#a77">CSoundDriverCreateWindowProc</a>;
00087                 myClass.cbClsExtra = 0;
00088                 myClass.cbWndExtra = 0;
00089 
00090                 <font class="keywordflow">if</font> (!RegisterClass(&amp;myClass)) 
00091                 {
00092                         <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"Failed to initialize the sound driver (RegisterClass)"</font>);
00093                         <font class="keywordflow">return</font> 0;
00094                 }
00095 
00096                 Registered = <font class="keyword">true</font>;
00097         }
00098 
00099         <a class="code" href="namespaceNLSOUND.html#a26">CSoundDriverWnd</a> = CreateWindow((LPSTR) <font class="stringliteral">"CSoundDriver"</font>, (LPSTR) <font class="stringliteral">"CSoundDriver"</font>, WS_OVERLAPPEDWINDOW,
00100                                                                         CW_USEDEFAULT, CW_USEDEFAULT, 400, 300, (HWND) NULL, (HMENU) NULL, 
00101                                                                         <a class="code" href="namespaceNLSOUND.html#a25">CSoundDriverDllHandle</a>, (LPSTR) NULL);  
00102 
00103         <font class="keywordflow">if</font> (<a class="code" href="namespaceNLSOUND.html#a26">CSoundDriverWnd</a> == NULL)
00104         {
00105                 <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"Failed to initialize the sound driver (CreateWindow)"</font>);
00106                 <font class="keywordflow">return</font> 0;
00107         }
00108         
00109         CSoundDriverDSound *driver = <font class="keyword">new</font> CSoundDriverDSound();
00110         driver-&gt;init(<a class="code" href="namespaceNLSOUND.html#a26">CSoundDriverWnd</a>);
00111 
00112         <font class="keywordflow">return</font> driver;
00113 }
00114 
00115 <font class="comment">// ******************************************************************</font>
00116 
00117 <a class="code" href="namespaceNLSOUND.html#a78">__declspec</a>(dllexport) uint32 NLSOUND_interfaceVersion()
00118 {
00119         <font class="keywordflow">return</font> ISoundDriver::InterfaceVersion;
00120 }
00121 
00122 <font class="comment">// ******************************************************************</font>
00123 
00124 <a class="code" href="namespaceNLSOUND.html#a78">__declspec</a>(dllexport) <font class="keywordtype">void</font> NLSOUND_outputProfile(ostream &amp;out)
00125 {
00126         CSoundDriverDSound::instance()-&gt;writeProfile(out);
00127 }
00128 
00129 
00130 
00131 
00132 
00133 <font class="comment">// ******************************************************************</font>
00134 
<a name="l00135"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a0">00135</a> CSoundDriverDSound::CSoundDriverDSound() : ISoundDriver()
00136 {
00137         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r0">_Instance</a> == NULL )
00138         {
00139                 <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r0">_Instance</a> = <font class="keyword">this</font>;
00140 
00141         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a> = NULL;
00142         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> = NULL;
00143         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o4">_SourceCount</a> = 0;
00144         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o5">_TimerID</a> = NULL;
00145 
00146 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00147 <font class="preprocessor"></font>        _TimerIntervalCount = 0;
00148         _TotalTime = 0.0;
00149         _TotalUpdateTime = 0.0;
00150                 _UpdateCount = 0;
00151                 _UpdateSources = 0;
00152                 _UpdateExec = 0;
00153 <font class="preprocessor">#endif</font>
00154 <font class="preprocessor"></font>
00155     }
00156         <font class="keywordflow">else</font>
00157         {
00158                 <a class="code" href="debug_8h.html#a3">nlerror</a>(<font class="stringliteral">"Sound driver singleton instanciated twice"</font>);
00159         }
00160 }
00161 
00162 <font class="comment">// ******************************************************************</font>
00163 
<a name="l00164"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a1">00164</a> CSoundDriverDSound::~CSoundDriverDSound()
00165 {
00166         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Destroying DirectSound driver"</font>);
00167 
00168     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o5">_TimerID</a> != NULL)
00169     {
00170         timeKillEvent(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o5">_TimerID</a>);
00171         timeEndPeriod(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o6">_TimerResolution</a>); 
00172     }
00173 
00174 
00175         <font class="comment">// Assure that the remaining sources have released all their DSBuffers </font>
00176         <font class="comment">// before closing down DirectSound</font>
00177         set&lt;CSourceDSound*&gt;::iterator iter;
00178 
00179         <font class="keywordflow">for</font> (iter = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.begin(); iter != <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.end(); iter++)
00180         {
00181                 (*iter)-&gt;release();
00182         }
00183 
00184 
00185         <font class="comment">// Assure that the listener has released all resources before closing </font>
00186         <font class="comment">// down DirectSound</font>
00187         <font class="keywordflow">if</font> (CListenerDSound::instance() != 0)
00188         {
00189                 CListenerDSound::instance()-&gt;release();
00190         }
00191 
00192 
00193     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> != NULL) 
00194     {
00195         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>-&gt;Release(); 
00196         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> = NULL;
00197     }
00198 
00199     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a> != NULL) 
00200     {
00201         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;Release(); 
00202         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a> = NULL;
00203     }
00204 
00205         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r0">_Instance</a> = 0;
00206 }
00207 
00208 <font class="comment">// ******************************************************************</font>
00209 
<a name="l00210"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html">00210</a> <font class="keyword">class </font>CDeviceDescription
00211 {
00212 <font class="keyword">public</font>:
00213 
00214     <font class="keyword">static</font> <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a0">CDeviceDescription</a>* <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#p0">_List</a>;
00215 
<a name="l00216"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a0">00216</a>     <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a0">CDeviceDescription</a>(LPGUID guid, <font class="keyword">const</font> <font class="keywordtype">char</font>* descr) 
00217     {
00218         <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m2">_Guid</a> = guid;
00219         <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m0">_Description</a> = strdup(descr);
00220         <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m1">_Next</a> = _List;
00221         _List = <font class="keyword">this</font>;
00222     }
00223 
<a name="l00224"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a1">00224</a>     <font class="keyword">virtual</font> <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a1">~CDeviceDescription</a>()
00225     {
00226         <font class="keywordflow">if</font> (_Description) 
00227         {
00228             free(<a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m0">_Description</a>);
00229         }
00230         <font class="keywordflow">if</font> (_Next)
00231         {
00232             <font class="keyword">delete</font> <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m1">_Next</a>;
00233         }
00234     }
00235 
<a name="l00236"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m0">00236</a>     <font class="keywordtype">char</font>* <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m0">_Description</a>;
<a name="l00237"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m1">00237</a>     <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#a0">CDeviceDescription</a>* <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m1">_Next</a>;
<a name="l00238"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m2">00238</a>     LPGUID <a class="code" href="classNLSOUND_1_1CDeviceDescription.html#m2">_Guid</a>;
00239 };
00240 
<a name="l00241"></a><a class="code" href="classNLSOUND_1_1CDeviceDescription.html#p0">00241</a> CDeviceDescription* CDeviceDescription::_List = 0;
00242 
00243 
00244 BOOL CALLBACK <a class="code" href="namespaceNLSOUND.html#a79">CSoundDriverDSoundEnumCallback</a>(LPGUID guid, LPCSTR description, PCSTR module, LPVOID context)
00245 {
00246     <font class="keyword">new</font> CDeviceDescription(guid, description);
00247     <font class="keywordflow">return</font> TRUE;
00248 }
00249 
00250 <font class="comment">// ******************************************************************</font>
00251 
<a name="l00252"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a3">00252</a> <font class="keywordtype">bool</font> CSoundDriverDSound::init(HWND wnd)
00253 {
00254     <font class="keywordflow">if</font> (FAILED(DirectSoundEnumerate(<a class="code" href="namespaceNLSOUND.html#a79">CSoundDriverDSoundEnumCallback</a>, <font class="keyword">this</font>)))
00255     {
00256         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to enumerate the DirectSound devices"</font>);
00257     }
00258 
00259     <font class="comment">// Create a DirectSound object and set the cooperative level.</font>
00260 
00261     <font class="keywordflow">if</font> (DirectSoundCreate(NULL, &amp;<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>, NULL) != DS_OK) 
00262     {
00263         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to create the DirectSound object"</font>);
00264     }
00265 
00266 
00267     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;SetCooperativeLevel(wnd, DSSCL_PRIORITY) != DS_OK) 
00268     {
00269         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to set the cooperative level"</font>);
00270     }
00271 
00272 
00273     <font class="comment">// Analyse the capabilities of the sound driver/device</font>
00274 
00275     <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o2">_Caps</a>.dwSize = <font class="keyword">sizeof</font>(_Caps); 
00276 
00277     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;GetCaps(&amp;<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o2">_Caps</a>) != DS_OK)  
00278     {
00279         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to query the sound device caps"</font>);
00280     }
00281 
00282 
00283     <font class="comment">// Create primary buffer </font>
00284  
00285     DSBUFFERDESC desc;
00286 
00287     ZeroMemory(&amp;desc, <font class="keyword">sizeof</font>(DSBUFFERDESC));
00288     desc.dwSize = <font class="keyword">sizeof</font>(DSBUFFERDESC);
00289 
00290 
00291     <font class="comment">// First, try to allocate a 3D hardware buffer.</font>
00292     <font class="comment">// If we can't get a 3D hardware buffer, use a 2D hardware buffer.</font>
00293     <font class="comment">// As last option, use a 2D software buffer.</font>
00294 
00295     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a9">countHw3DBuffers</a>() &gt; 0) 
00296     {
00297                 <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Primary buffer: Allocating 3D buffer in hardware"</font>);
00298         desc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_LOCHARDWARE | DSBCAPS_CTRL3D | DSBCAPS_CTRLVOLUME;
00299     } 
00300     <font class="keywordflow">else</font>
00301     {
00302                 <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Primary buffer: Allocating 3D buffer in software"</font>);
00303         desc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_LOCSOFTWARE | DSBCAPS_CTRL3D | DSBCAPS_CTRLVOLUME;
00304         desc.guid3DAlgorithm = DS3DALG_NO_VIRTUALIZATION;
00305     }
00306 
00307 
00308     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;CreateSoundBuffer(&amp;desc, &amp;<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>, NULL) != DS_OK) 
00309     {
00310 
00311                 <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"Primary buffer: Failed to create a buffer with 3D capabilities."</font>);
00312 
00313                 ZeroMemory(&amp;desc, <font class="keyword">sizeof</font>(DSBUFFERDESC));
00314                 desc.dwSize = <font class="keyword">sizeof</font>(DSBUFFERDESC);
00315 
00316                 <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a10">countHw2DBuffers</a>() &gt; 0) 
00317                 {
00318                         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Primary buffer: Allocating 2D buffer in hardware"</font>);
00319                         desc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_LOCHARDWARE | DSBCAPS_CTRLVOLUME;
00320                 } 
00321                 <font class="keywordflow">else</font>
00322                 {
00323                         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Primary buffer: Allocating 2D buffer in software"</font>);
00324                         desc.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_LOCSOFTWARE | DSBCAPS_CTRLVOLUME;
00325                 }
00326 
00327                 <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;CreateSoundBuffer(&amp;desc, &amp;<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>, NULL) != DS_OK) 
00328                 {
00329                         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to create the primary buffer"</font>);
00330                 }
00331     }
00332 
00333 
00334     <font class="comment">// Set the format of the primary buffer</font>
00335 
00336     WAVEFORMATEX <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>;
00337 
00338     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.cbSize = <font class="keyword">sizeof</font>(WAVEFORMATEX);
00339 
00340     <font class="comment">// Make sure the sound card accepts the default settings.</font>
00341     <font class="comment">// For now, only the default settings are accepted. Fallback</font>
00342     <font class="comment">// strategy will be handled later.</font>
00343 
00344     <font class="keywordflow">if</font> ((<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o2">_Caps</a>.dwMinSecondarySampleRate &gt; 22050) &amp;&amp; (22050 &gt; <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o2">_Caps</a>.dwMaxSecondarySampleRate)) {
00345         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported sample rate range"</font>);        
00346     }   
00347 
00348     <font class="keywordflow">if</font> ((<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o2">_Caps</a>.dwFlags &amp; DSCAPS_PRIMARY16BIT) == 0) {
00349         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported sample size [16bits]"</font>);        
00350     }   
00351 
00352     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample = 16;
00353     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nChannels = 1;
00354     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nSamplesPerSec = 22050;
00355     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nBlockAlign = <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nChannels * <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample / 8;
00356     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nAvgBytesPerSec = <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nSamplesPerSec * <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nBlockAlign;
00357     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wFormatTag = WAVE_FORMAT_PCM;
00358 
00359 
00360     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>-&gt;SetFormat(&amp;<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>) != DS_OK) 
00361     {
00362         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to create set the format of the primary buffer"</font>);
00363     }
00364 
00365 
00366     uint32 numBuffers = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a9">countHw3DBuffers</a>();
00367         <font class="keywordflow">if</font> (numBuffers == 0)
00368         {
00369                 numBuffers = 31;
00370         }
00371 
00372         <font class="comment">/*</font>
00373 <font class="comment">    _Sources = new CSourceDSound*[numBuffers];</font>
00374 <font class="comment"></font>
00375 <font class="comment"></font>
00376 <font class="comment">        for (uint i = 0; i &lt; numBuffers; i++) </font>
00377 <font class="comment">        {</font>
00378 <font class="comment">                _Sources[i] = 0;</font>
00379 <font class="comment">        }</font>
00380 <font class="comment"></font>
00381 <font class="comment">        try</font>
00382 <font class="comment">        {</font>
00383 <font class="comment">            for (i = 0; i &lt; numBuffers; i++) </font>
00384 <font class="comment">                {</font>
00385 <font class="comment">                        _Sources[i] = new CSourceDSound(i);</font>
00386 <font class="comment">                        _Sources[i]-&gt;init(_DirectSound);</font>
00387 <font class="comment">                        _SourceCount++;</font>
00388 <font class="comment">                }</font>
00389 <font class="comment">        }</font>
00390 <font class="comment">        catch (ESoundDriver&amp; e)</font>
00391 <font class="comment">        {</font>
00392 <font class="comment">                // Okay, here's the situation: I'm listening to WinAmp while debugging.</font>
00393 <font class="comment">                // The caps told me there were 31 buffers available. In reality, there were</font>
00394 <font class="comment">                // only 30 available because WinAmp was using one. Somehow DirectSound didn't</font>
00395 <font class="comment">                // notice. So when creating buffer 31, an exception was thrown. </font>
00396 <font class="comment">                // If something like this happens, don't bother and go on with the buffers we've </font>
00397 <font class="comment">                // got. If no buffers are created at all, throw the exception again.</font>
00398 <font class="comment"></font>
00399 <font class="comment">                if (_Sources == 0)</font>
00400 <font class="comment">                {</font>
00401 <font class="comment">                        throw e;</font>
00402 <font class="comment">                }</font>
00403 <font class="comment">        }</font>
00404 <font class="comment"></font>
00405 <font class="comment">*/</font>
00406 
00407 
00408     TIMECAPS tcaps;
00409     
00410     timeGetDevCaps(&amp;tcaps, <font class="keyword">sizeof</font>(TIMECAPS));
00411     <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o6">_TimerResolution</a> = (tcaps.wPeriodMin &gt; 10)? tcaps.wPeriodMin : 10;
00412     timeBeginPeriod(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o6">_TimerResolution</a>); 
00413 
00414 
00415 
00416 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00417 <font class="preprocessor"></font>    <font class="keywordflow">for</font> (uint i = 0; i &lt; 1024; i++)
00418     {
00419         _TimerInterval[i] = 0;
00420     }
00421 
00422     _TimerDate = CTime::getPerformanceTime();
00423 <font class="preprocessor">#endif</font>
00424 <font class="preprocessor"></font>
00425 
00426 
00427 
00428     <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o5">_TimerID</a> = timeSetEvent(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#r1">_TimerPeriod</a>, 0, &amp;CSoundDriverDSound::TimerCallback, (DWORD)<font class="keyword">this</font>, TIME_CALLBACK_FUNCTION | TIME_PERIODIC);
00429 
00430     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o5">_TimerID</a> == NULL)
00431     {
00432         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to create the timer"</font>);
00433     }
00434 
00435         
00436 
00437 
00438     <font class="keywordflow">return</font> <font class="keyword">true</font>;
00439 }
00440 
00441 <font class="comment">// ******************************************************************</font>
00442 
<a name="l00443"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a8">00443</a> uint CSoundDriverDSound::countMaxSources()
00444 {
00445         <font class="comment">// Try the hardware 3d buffers first</font>
00446         uint n = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a9">countHw3DBuffers</a>();
00447         <font class="keywordflow">if</font> (n &gt; 0) 
00448         {
00449                 <font class="keywordflow">return</font> n;
00450         }
00451 
00452         <font class="comment">// If not, try the hardware 2d buffers first</font>
00453         n = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a10">countHw2DBuffers</a>();
00454         <font class="keywordflow">if</font> (n &gt; 0)
00455         {
00456                 <font class="keywordflow">return</font> n;
00457         }
00458 
00459         <font class="comment">// Okay, we'll use 32 software buffers</font>
00460         <font class="keywordflow">return</font> 32;
00461 }
00462 
00463 <font class="comment">// ******************************************************************</font>
00464 
<a name="l00465"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a13">00465</a> <font class="keywordtype">void</font> CSoundDriverDSound::writeProfile(ostream&amp; out)
00466 {
00467     <font class="comment">// Write the available sound devices</font>
00468     CDeviceDescription* list = CDeviceDescription::_List;
00469     <font class="keywordflow">while</font> (list) {
00470                 out &lt;&lt; list-&gt;_Description &lt;&lt; <font class="stringliteral">"\n"</font>;
00471         list = list-&gt;_Next;
00472     }
00473 
00474     out &lt;&lt; <font class="stringliteral">"\n"</font>;
00475 
00476     <font class="comment">// Write the buffers sizes</font>
00477     out &lt;&lt; <font class="stringliteral">"buffer size: "</font> &lt;&lt; CSourceDSound::_SecondaryBufferSize &lt;&lt; <font class="stringliteral">"\n"</font>;
00478     out &lt;&lt; <font class="stringliteral">"copy size: "</font> &lt;&lt; CSourceDSound::_UpdateCopySize &lt;&lt; <font class="stringliteral">"\n"</font>;
00479     out &lt;&lt; <font class="stringliteral">"swap size: "</font> &lt;&lt; CSourceDSound::_SwapCopySize &lt;&lt; <font class="stringliteral">"\n"</font>;
00480     out &lt;&lt; <font class="stringliteral">"\n"</font>;
00481 
00482     <font class="comment">// Write the number of hardware buffers </font>
00483     DSCAPS caps;
00484     caps.dwSize = <font class="keyword">sizeof</font>(caps); 
00485     <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;GetCaps(&amp;caps);  
00486 
00487     cout &lt;&lt; <font class="stringliteral">"3d hw buffers: "</font> &lt;&lt; caps.dwMaxHw3DAllBuffers &lt;&lt; <font class="stringliteral">"\n"</font>;
00488         cout &lt;&lt; <font class="stringliteral">"2d hw buffers: "</font> &lt;&lt; caps.dwMaxHwMixingAllBuffers &lt;&lt; <font class="stringliteral">"\n"</font>;
00489     out &lt;&lt; <font class="stringliteral">"\n"</font>;
00490 
00491     <font class="comment">// Write the number of hardware buffers </font>
00492 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00493 <font class="preprocessor"></font>    out &lt;&lt; <font class="stringliteral">"update time total --- "</font> &lt;&lt;  getAverageUpdateTime()&lt;&lt; <font class="stringliteral">"\n"</font>;
00494         out &lt;&lt; <font class="stringliteral">"update time source --- "</font> &lt;&lt; CSourceDSound::getAverageUpdateTime() &lt;&lt; <font class="stringliteral">"\n"</font>;
00495         out &lt;&lt; <font class="stringliteral">"update --- t: "</font> &lt;&lt; CSourceDSound::getAverageCumulTime();
00496         out &lt;&lt; <font class="stringliteral">" - p: "</font> &lt;&lt; CSourceDSound::getAveragePosTime();
00497         out &lt;&lt; <font class="stringliteral">" - l: "</font> &lt;&lt; CSourceDSound::getAverageLockTime();
00498         out &lt;&lt; <font class="stringliteral">" - c: "</font> &lt;&lt; CSourceDSound::getAverageCopyTime();
00499         out &lt;&lt; <font class="stringliteral">" - u: "</font> &lt;&lt; CSourceDSound::getAverageUnlockTime() &lt;&lt; <font class="stringliteral">"\n"</font>;
00500         out &lt;&lt; <font class="stringliteral">"update percentage: --- "</font> &lt;&lt; getUpdatePercentage() &lt;&lt; <font class="stringliteral">"\n"</font>;
00501         out &lt;&lt; <font class="stringliteral">"update num sources --- "</font> &lt;&lt; getAverageUpdateSources() &lt;&lt; <font class="stringliteral">"\n"</font>;
00502         out &lt;&lt; <font class="stringliteral">"update byte size --- "</font> &lt;&lt; CSourceDSound::getAverageUpdateSize() &lt;&lt; <font class="stringliteral">"\n"</font>;
00503         out &lt;&lt; <font class="stringliteral">"swap time --- "</font> &lt;&lt; CSourceDSound::getTestAverage() &lt;&lt; <font class="stringliteral">"\n"</font>;
00504         out &lt;&lt; <font class="stringliteral">"src --- "</font> &lt;&lt; <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a11">countPlayingSources</a>() &lt;&lt; <font class="stringliteral">"\n"</font>;
00505 <font class="preprocessor">#endif</font>
00506 <font class="preprocessor"></font>}
00507 
00508 
<a name="l00509"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#f0">00509</a> <font class="keywordtype">void</font> CALLBACK CSoundDriverDSound::TimerCallback(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
00510 {
00511     <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a0">CSoundDriverDSound</a>* driver = (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a0">CSoundDriverDSound</a>*) dwUser;
00512     driver-&gt;update();
00513 }
00514 
00515 <font class="comment">// ******************************************************************</font>
00516 
<a name="l00517"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a12">00517</a> <font class="keywordtype">void</font> CSoundDriverDSound::update()
00518 {
00519 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00520 <font class="preprocessor"></font>    <a class="code" href="namespaceNLMISC.html#a184">TTicks</a> now = CTime::getPerformanceTime();
00521 <font class="preprocessor">#endif</font>
00522 <font class="preprocessor"></font>
00523         set&lt;CSourceDSound*&gt;::iterator iter;
00524 
00525         iter = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.begin();
00526 
00527         <font class="keywordflow">if</font> ((iter != <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.end()) &amp;&amp; (*iter)-&gt;needsUpdate())
00528         {
00529                 <font class="keywordflow">while</font> (iter != <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.end())
00530                 {
00531                         <font class="keywordflow">if</font> ((*iter)-&gt;update2()) {
00532 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00533 <font class="preprocessor"></font>                                _UpdateSources++;
00534 <font class="preprocessor">#endif</font>
00535 <font class="preprocessor"></font>                        }
00536                         iter++;
00537                 }
00538         }
00539 
00540 
00541 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00542 <font class="preprocessor"></font>    _TotalUpdateTime += 1000.0 * CTime::ticksToSecond(CTime::getPerformanceTime() - now);
00543         _UpdateCount++;
00544 <font class="preprocessor">#endif</font>
00545 <font class="preprocessor"></font>}
00546 
00547 <font class="comment">// ******************************************************************</font>
00548 
<a name="l00549"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a9">00549</a> uint CSoundDriverDSound::countHw3DBuffers()
00550 {
00551     DSCAPS caps;
00552     caps.dwSize = <font class="keyword">sizeof</font>(caps); 
00553 
00554     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;GetCaps(&amp;caps) != DS_OK)  
00555     {
00556         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to query the sound device caps"</font>);
00557     }
00558 
00559     <font class="keywordflow">return</font> caps.dwFreeHw3DStreamingBuffers;
00560 }
00561 
00562 <font class="comment">// ******************************************************************</font>
00563 
<a name="l00564"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a10">00564</a> uint CSoundDriverDSound::countHw2DBuffers()
00565 {
00566     DSCAPS caps;
00567     caps.dwSize = <font class="keyword">sizeof</font>(caps); 
00568 
00569     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;GetCaps(&amp;caps) != DS_OK)  
00570     {
00571         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to query the sound device caps"</font>);
00572     }
00573 
00574     <font class="keywordflow">return</font> caps.dwFreeHwMixingStreamingBuffers;
00575 }
00576 
00577 <font class="comment">// ******************************************************************</font>
00578 
<a name="l00579"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a2">00579</a> IListener *CSoundDriverDSound::createListener()
00580 {
00581     LPDIRECTSOUND3DLISTENER dsoundListener;
00582 
00583     <font class="keywordflow">if</font> (CListenerDSound::instance() != NULL) 
00584     {
00585         <font class="keywordflow">return</font> CListenerDSound::instance();
00586     }
00587 
00588     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> == 0) 
00589     {
00590         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Corrupt driver"</font>);
00591     }
00592 
00593     <font class="keywordflow">if</font> (FAILED(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>-&gt;QueryInterface(IID_IDirectSound3DListener, (LPVOID *) &amp;dsoundListener)))
00594     {
00595                 <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"The 3D listener interface is not available."</font>);
00596         <font class="keywordflow">return</font> <font class="keyword">new</font> CListenerDSound(NULL);
00597     }
00598 
00599     <font class="keywordflow">return</font> <font class="keyword">new</font> CListenerDSound(dsoundListener);
00600 }
00601 
00602 <font class="comment">// ******************************************************************</font>
00603 
<a name="l00604"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a4">00604</a> IBuffer *CSoundDriverDSound::createBuffer()
00605 {
00606     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> == 0) 
00607     {
00608         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Corrupt driver"</font>);
00609     }
00610 
00611 
00612     <font class="comment">// FIXME: set buffer ID</font>
00613     <font class="keywordflow">return</font> <font class="keyword">new</font> CBufferDSound();   
00614 }
00615 
00616 <font class="comment">// ******************************************************************</font>
00617 
<a name="l00618"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#c2">00618</a> <font class="keywordtype">void</font> CSoundDriverDSound::removeBuffer(IBuffer *buffer)
00619 {
00620 }
00621 
00622 <font class="comment">// ******************************************************************</font>
00623 
<a name="l00624"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a5">00624</a> <font class="keywordtype">bool</font> CSoundDriverDSound::loadWavFile(IBuffer *destbuffer, <font class="keyword">const</font> <font class="keywordtype">char</font> *filename)
00625 {
00626         <font class="keywordflow">return</font> ((CBufferDSound*) destbuffer)-&gt;loadWavFile(filename);
00627 }
00628 
00629 <font class="comment">// ******************************************************************</font>
00630 
<a name="l00631"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a6">00631</a> ISource *CSoundDriverDSound::createSource()
00632 {
00633     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> == 0) 
00634     {
00635         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Corrupt driver"</font>);
00636     }
00637 
00638 
00639         CSourceDSound* <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a> = <font class="keyword">new</font> CSourceDSound(0);
00640         <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>-&gt;init(<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>);
00641         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.insert(<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>);
00642 
00643         <font class="keywordflow">return</font> <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>;
00644 }
00645 
00646 
00647 <font class="comment">// ******************************************************************</font>
00648 
<a name="l00649"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#c3">00649</a> <font class="keywordtype">void</font> CSoundDriverDSound::removeSource(ISource *source)
00650 {
00651         <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.erase((CSourceDSound*) source);
00652 }
00653 
00654 <font class="comment">// ******************************************************************</font>
00655 
<a name="l00656"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a7">00656</a> <font class="keywordtype">void</font> CSoundDriverDSound::commit3DChanges()
00657 {
00658         CListenerDSound* listener = CListenerDSound::instance();
00659         listener-&gt;commit3DChanges();
00660 
00661 
00662         <font class="keyword">const</font> CVector &amp;origin = listener-&gt;getPos();
00663 
00664         set&lt;CSourceDSound*&gt;::iterator iter;
00665 
00666         <font class="comment">// We handle the volume of the source according to the distance</font>
00667         <font class="comment">// ourselves. Call updateVolume() to, well..., update the volume</font>
00668         <font class="comment">// according to, euh ..., the new distance!</font>
00669         <font class="keywordflow">for</font> (iter = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.begin(); iter != <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.end(); iter++)
00670         {
00671                 <font class="keywordflow">if</font> ((*iter)-&gt;isPlaying()) 
00672                 {
00673                         (*iter)-&gt;updateVolume(origin);
00674                 }
00675         }
00676 }
00677 
00678 
00679 <font class="comment">// ******************************************************************</font>
00680 
<a name="l00681"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a11">00681</a> uint CSoundDriverDSound::countPlayingSources()
00682 {
00683     uint n = 0;
00684         set&lt;CSourceDSound*&gt;::iterator iter;
00685 
00686         <font class="keywordflow">for</font> (iter = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.begin(); iter != <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o3">_Sources</a>.end(); iter++)
00687         {
00688                 <font class="keywordflow">if</font> ((*iter)-&gt;isPlaying()) 
00689                 {
00690                         n++;
00691                 }
00692         }
00693 
00694     <font class="keywordflow">return</font> n;
00695 }
00696 
00697 
00698 <font class="comment">// ******************************************************************</font>
00699 
<a name="l00700"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a14">00700</a> <font class="keywordtype">void</font> CSoundDriverDSound::setGain( <font class="keywordtype">float</font> gain )
00701 {
00702         <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> != 0)
00703         {
00704                 <font class="keywordflow">if</font> (gain &lt; 0.00001f)
00705                 {
00706                         gain = 0.00001f;
00707                 }
00708 
00709                 <font class="comment">/* convert from linear amplitude to hundredths of decibels */</font>
00710                 LONG volume = (LONG)(100.0 * 20.0 * log10(gain));
00711 
00712                 <font class="keywordflow">if</font> (volume &lt; DSBVOLUME_MIN) 
00713                 {
00714                         volume = DSBVOLUME_MIN;
00715                 }
00716                 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (volume &gt; DSBVOLUME_MAX) 
00717                 {
00718                         volume = DSBVOLUME_MAX;
00719                 }
00720 
00721                 HRESULT hr = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>-&gt;SetVolume(volume);
00722 
00723                 <font class="keywordflow">if</font> (hr != DS_OK)
00724                 {
00725                         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Failed to set the volume"</font>);
00726                 }
00727         }
00728 }
00729 
00730 <font class="comment">// ******************************************************************</font>
00731 
<a name="l00732"></a><a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#a15">00732</a> <font class="keywordtype">float</font> CSoundDriverDSound::getGain()
00733 {
00734         <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a> != 0)
00735         {
00736                 <font class="comment">/* convert from hundredths of decibels to linear amplitude */</font>
00737                 LONG volume;
00738                 HRESULT hr = <a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o1">_PrimaryBuffer</a>-&gt;GetVolume(&amp;volume);
00739 
00740                 <font class="keywordflow">if</font> (hr != DS_OK)
00741                 {
00742                         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Failed to get the volume"</font>);
00743                         <font class="keywordflow">return</font> 1.0;
00744                 }
00745 
00746                 <font class="keywordflow">return</font> (float) pow(10, (<font class="keywordtype">double</font>) volume / 20.0 / 100.0);
00747         }
00748 
00749         <font class="keywordflow">return</font> 1.0;
00750 }
00751 
00752 
00753 
00754 <font class="preprocessor">#if NLSOUND_PROFILE</font>
00755 <font class="preprocessor"></font>
00756 <font class="comment">// ******************************************************************</font>
00757 
00758 uint CSoundDriverDSound::countTimerIntervals()
00759 {
00760     <font class="keywordflow">return</font> 1024;
00761 }
00762 
00763 <font class="comment">// ******************************************************************</font>
00764 
00765 uint CSoundDriverDSound::getTimerIntervals(uint <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>)
00766 {           
00767     <font class="keywordflow">return</font> _TimerInterval[<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>];
00768 }
00769 
00770 <font class="comment">// ******************************************************************</font>
00771 
00772 <font class="keywordtype">void</font> CSoundDriverDSound::addTimerInterval(uint32 dt) 
00773 {
00774     <font class="keywordflow">if</font> (_TimerIntervalCount &gt;= 1024)
00775     {
00776         _TimerIntervalCount = 0;
00777     }
00778 
00779     _TimerInterval[_TimerIntervalCount++] = dt;
00780 }
00781 
00782 <font class="comment">// ******************************************************************</font>
00783 
00784 <font class="keywordtype">double</font> CSoundDriverDSound::getCPULoad()
00785 {
00786     <font class="keywordflow">return</font> (_TotalTime &gt; 0.0)? 100.0 * _TotalUpdateTime / _TotalTime : 0.0;  
00787 }
00788 
00789 <font class="comment">// ******************************************************************</font>
00790 
00791 <font class="keywordtype">void</font> CSoundDriverDSound::printDriverInfo(FILE* fp)
00792 {
00793     CDeviceDescription* list = CDeviceDescription::_List;
00794 
00795     <font class="keywordflow">while</font> (list) {
00796         fprintf(fp, <font class="stringliteral">"%s\n"</font>, list-&gt;_Description);
00797         list = list-&gt;_Next;
00798     }
00799 
00800     fprintf(fp, <font class="stringliteral">"\n"</font>);
00801 
00802     fprintf(fp, <font class="stringliteral">"buffer size: %d\n"</font>
00803                                 <font class="stringliteral">"copy size: %d\n"</font>
00804                                 <font class="stringliteral">"swap size: %d\n"</font>, 
00805                         CSourceDSound::_SecondaryBufferSize,
00806                         CSourceDSound::_UpdateCopySize,
00807                         CSourceDSound::_SwapCopySize);
00808 
00809     fprintf(fp, <font class="stringliteral">"\n"</font>);
00810 
00811     DSCAPS caps;
00812     caps.dwSize = <font class="keyword">sizeof</font>(caps); 
00813 
00814     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CSoundDriverDSound.html#o0">_DirectSound</a>-&gt;GetCaps(&amp;caps) != DS_OK)  
00815     {
00816         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to query the sound device caps"</font>);
00817     }
00818 
00819     
00820     fprintf(fp, <font class="stringliteral">"3d hw buffers: %d\n"</font> <font class="stringliteral">"2d hw buffers: %d\n\n"</font>, caps.dwMaxHw3DAllBuffers, caps.dwMaxHwMixingAllBuffers);
00821 }
00822 
00823 <font class="preprocessor">#endif</font>
00824 <font class="preprocessor"></font>
00825 
00826 } <font class="comment">// NLSOUND</font>
</pre></div>

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