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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 <windows.h></font>
00033 <font class="preprocessor">#include <mmsystem.h></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 &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, &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, &chunk, &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 < (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) &<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, &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 < 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, &data_chunk, &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> < 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> < <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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