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<hr><h1>buffer_dsound.cpp</h1><a href="buffer__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="preprocessor">#include "<a class="code" href="stddsound_8h.html">stddsound.h</a>"</font>
00028 <font class="preprocessor">#include "<a class="code" href="buffer__dsound_8h.html">buffer_dsound.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="path_8h.html">nel/misc/path.h</a>"</font>
00030 
00031 
00032 <font class="preprocessor">#include &lt;windows.h&gt;</font>
00033 <font class="preprocessor">#include &lt;mmsystem.h&gt;</font>
00034 
00035 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00036 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00037 
00038 <font class="keyword">namespace </font>NLSOUND {
00039 
00040 
<a name="l00041"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a0">00041</a> CBufferDSound::CBufferDSound()
00042 {
00043     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> = NULL;
00044     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a> = 0; 
00045     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="namespaceNLSOUND.html#a83a22">Mono16</a>;
00046     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o4">_Freq</a> = 0;
00047 }
00048 
<a name="l00049"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a1">00049</a> CBufferDSound::~CBufferDSound()
00050 {
00051         <a class="code" href="debug_8h.html#a0">nldebug</a>(<font class="stringliteral">"Destroying DirectSound buffer %s (%p)"</font>, <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o0">_Name</a>.c_str(), <font class="keyword">this</font>);
00052 
00053     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> != NULL)
00054     {
00055         <font class="keyword">delete</font>[] <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a>;
00056     }
00057 }
00058 
<a name="l00059"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a2">00059</a> <font class="keywordtype">void</font> CBufferDSound::presetName(<font class="keyword">const</font> std::string &amp;bufferName)
00060 {
00061         <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o0">_Name</a> = bufferName;
00062 }
00063 
00064 
<a name="l00065"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a3">00065</a> <font class="keywordtype">void</font> CBufferDSound::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 )
00066 {
00067     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>;
00068     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o4">_Freq</a> = freq;
00069 }
00070 
00071 
<a name="l00072"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a4">00072</a> <font class="keywordtype">bool</font> CBufferDSound::fillBuffer( <font class="keywordtype">void</font> *<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, uint32 bufsize )
00073 {
00074     <font class="keywordflow">return</font> <font class="keyword">false</font>;
00075 }
00076 
00077 
<a name="l00078"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a6">00078</a> <font class="keywordtype">float</font> CBufferDSound::getDuration()<font class="keyword"> const</font>
00079 <font class="keyword"></font>{
00080     <font class="keywordtype">float</font> frames = (float) <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a>;
00081 
00082     <font class="keywordflow">switch</font> (_Format) {
00083     <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a21">Mono8</a>:
00084         <font class="keywordflow">break</font>;
00085     <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a22">Mono16</a>:
00086         frames /= 2.0f;
00087         <font class="keywordflow">break</font>;
00088     <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a23">Stereo8</a>:
00089         frames /= 2.0f;
00090         <font class="keywordflow">break</font>;
00091     <font class="keywordflow">case</font> <a class="code" href="namespaceNLSOUND.html#a83a24">Stereo16</a>:
00092         frames /= 4.0f;
00093         <font class="keywordflow">break</font>;
00094     }
00095 
00096     <font class="keywordflow">return</font> 1000.0f * frames / (float) <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o4">_Freq</a>;
00097 }
00098 
00099 
<a name="l00100"></a><a class="code" href="classNLSOUND_1_1CBufferDSound.html#a10">00100</a> <font class="keywordtype">bool</font> CBufferDSound::loadWavFile(<font class="keyword">const</font> <font class="keywordtype">char</font>* <a class="code" href="cf__lexical_8cpp.html#a95">file</a>) 
00101 {
00102     sint error; 
00103     sint32 <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a>;
00104     HMMIO hmmio;
00105     WAVEFORMATEX <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>;
00106     MMCKINFO riff_chunk;
00107     MMCKINFO data_chunk;
00108     MMCKINFO chunk;
00109 
00110   
00111     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> != NULL)
00112     {
00113         free(<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a>);
00114         <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> = NULL;
00115     }
00116 
00117 
00118     <font class="comment">// Open the file </font>
00119     hmmio = mmioOpen((<font class="keywordtype">char</font>*) <a class="code" href="cf__lexical_8cpp.html#a95">file</a>, NULL, MMIO_READ | MMIO_DENYWRITE);
00120 
00121     <font class="keywordflow">if</font> (hmmio == NULL) 
00122     {
00123         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to open the file"</font>);
00124     }
00125 
00126 
00127     <font class="comment">// Check it's a WAVE file </font>
00128     riff_chunk.ckid = FOURCC_RIFF;
00129 
00130     error = (sint) mmioDescend(hmmio, &amp;riff_chunk, NULL, 0);
00131 
00132     <font class="keywordflow">if</font> ((error != 0) || (riff_chunk.ckid != FOURCC_RIFF) || (riff_chunk.fccType != mmioFOURCC(<font class="charliteral">'W'</font>, <font class="charliteral">'A'</font>, <font class="charliteral">'V'</font>, <font class="charliteral">'E'</font>))) 
00133     {
00134         mmioClose(hmmio, 0);
00135         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Not a WAVE file"</font>);
00136     }
00137 
00138 
00139     <font class="comment">// Search the format chunk </font>
00140     chunk.ckid = mmioFOURCC(<font class="charliteral">'f'</font>, <font class="charliteral">'m'</font>, <font class="charliteral">'t'</font>, <font class="charliteral">' '</font>);
00141 
00142     error = (sint) mmioDescend(hmmio, &amp;chunk, &amp;riff_chunk, MMIO_FINDCHUNK);
00143 
00144     <font class="keywordflow">if</font> (error != 0) 
00145     {
00146         mmioClose(hmmio, 0);
00147         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Couldn't find the format chunk"</font>);
00148     }
00149 
00150     <font class="keywordflow">if</font> (chunk.cksize &lt; (long) <font class="keyword">sizeof</font>(PCMWAVEFORMAT)) 
00151     {
00152         mmioClose(hmmio, 0);
00153         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Invalid format chunk size"</font>);
00154     }
00155 
00156 
00157     <font class="comment">// read in the format data</font>
00158 
00159     <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a> = mmioRead(hmmio, (HPSTR) &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>, (<font class="keywordtype">long</font>) <font class="keyword">sizeof</font>(<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>));
00160     <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a> != (long) <font class="keyword">sizeof</font>(format)) 
00161     {
00162         mmioClose(hmmio, 0);
00163         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Read failed"</font>);
00164     }
00165 
00166     <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.cbSize = 0;
00167 
00168     <font class="comment">// Get out of the format chunk</font>
00169 
00170     <font class="keywordflow">if</font> (mmioAscend(hmmio, &amp;chunk, 0) != 0) 
00171     {
00172         mmioClose(hmmio, 0);
00173         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Read failed"</font>);
00174     }
00175 
00176 
00177     <font class="comment">// copy the format data </font>
00178 
00179     <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wFormatTag != WAVE_FORMAT_PCM) 
00180     {
00181         mmioClose(hmmio, 0);
00182         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported sample format"</font>);
00183     }
00184 
00185     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o4">_Freq</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nSamplesPerSec;
00186 
00187     <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nChannels == 1) 
00188     {
00189         <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample == 8)
00190         {
00191             <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="namespaceNLSOUND.html#a83a21">Mono8</a>;
00192         } 
00193         <font class="keywordflow">else</font> <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample == 16)
00194         {
00195             <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="namespaceNLSOUND.html#a83a22">Mono16</a>;
00196         }
00197         <font class="keywordflow">else</font>
00198         {
00199             mmioClose(hmmio, 0);
00200             <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported sample size"</font>);
00201         }
00202     }
00203     <font class="keywordflow">else</font> <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.nChannels == 2)
00204     {
00205         <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample == 8)
00206         {
00207             <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="namespaceNLSOUND.html#a83a23">Stereo8</a>;
00208         } 
00209         <font class="keywordflow">else</font> <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a398">format</a>.wBitsPerSample == 16)
00210         {
00211             <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o3">_Format</a> = <a class="code" href="namespaceNLSOUND.html#a83a24">Stereo16</a>;
00212         }
00213         <font class="keywordflow">else</font>
00214         {
00215             mmioClose(hmmio, 0);
00216             <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported sample size"</font>);
00217         }
00218     }
00219     <font class="keywordflow">else</font> <font class="comment">// Shouldn't normally happen</font>
00220     {
00221         mmioClose(hmmio, 0);
00222         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Unsupported number of channels"</font>);
00223     }
00224 
00225     
00226     <font class="comment">// Set the file position to the beginning of the data chunk */</font>
00227  
00228     sint32 pos = mmioSeek(hmmio, riff_chunk.dwDataOffset + <font class="keyword">sizeof</font>(FOURCC), SEEK_SET);
00229 
00230     <font class="keywordflow">if</font> (pos &lt; 0) 
00231     {
00232         mmioClose(hmmio, 0);
00233         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Read to set the read position"</font>);
00234     }
00235 
00236     data_chunk.ckid = mmioFOURCC(<font class="charliteral">'d'</font>, <font class="charliteral">'a'</font>, <font class="charliteral">'t'</font>, <font class="charliteral">'a'</font>);
00237 
00238     <font class="keywordflow">if</font> (mmioDescend(hmmio, &amp;data_chunk, &amp;riff_chunk, MMIO_FINDCHUNK) != 0) 
00239     {
00240         mmioClose(hmmio, 0);
00241         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Read to set the read position"</font>);
00242     }
00243 
00244 
00245     <font class="comment">// Allocate the sample buffer</font>
00246     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a> = data_chunk.cksize;
00247 
00248     <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> = <font class="keyword">new</font> uint8[<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a>];
00249 
00250     <font class="keywordflow">if</font> (<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a> == NULL)
00251     {
00252         mmioClose(hmmio, 0);
00253         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Out of memory"</font>);
00254     }
00255 
00256 
00257     <font class="comment">// Read the sample data</font>
00258 
00259     <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a> = mmioRead(hmmio, (HPSTR) <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a>, <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a>);
00260 
00261     <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a> &lt; 0) 
00262     {
00263         <font class="keywordflow">throw</font> ESoundDriver(<font class="stringliteral">"Failed to read the samples"</font>);
00264     }
00265     <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uint32) <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a> &lt; <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a>)
00266     {
00267         <font class="comment">// FIXME: print warning or throw exception ???</font>
00268         <font class="keywordtype">char</font>* p = (<font class="keywordtype">char</font>*) <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o1">_Data</a>;
00269         ZeroMemory(p + <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a>, <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o2">_Size</a> - <a class="code" href="driver__opengl__extension__def_8h.html#a410">num</a>);
00270     }
00271 
00272 
00273     mmioClose(hmmio, 0);
00274 
00275 
00276         std::string name = CFile::getFilenameWithoutExtension(<a class="code" href="cf__lexical_8cpp.html#a95">file</a>);
00277         <font class="comment">// if name is preseted, the name must match.</font>
00278         <font class="keywordflow">if</font> (!<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o0">_Name</a>.empty())
00279         {
00280                 <a class="code" href="debug_8h.html#a8">nlassertex</a>(<a class="code" href="classNLSOUND_1_1CBufferDSound.html#o0">_Name</a> == name, (<font class="stringliteral">"The preseted name and buffer name doen't match !"</font>));
00281         }
00282         <a class="code" href="classNLSOUND_1_1CBufferDSound.html#o0">_Name</a> = name;
00283 
00284         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00285 
00286 }
00287 
00288 
00289 } <font class="comment">// NLSOUND</font>
00290 
00291 
00292 
</pre></div>

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