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<h1>SoundFileDefault.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// SFML - Simple and Fast Multimedia Library</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This software is provided 'as-is', without any express or implied warranty.</span>
<a name="l00007"></a>00007 <span class="comment">// In no event will the authors be held liable for any damages arising from the use of this software.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// Permission is granted to anyone to use this software for any purpose,</span>
<a name="l00010"></a>00010 <span class="comment">// including commercial applications, and to alter it and redistribute it freely,</span>
<a name="l00011"></a>00011 <span class="comment">// subject to the following restrictions:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// 1. The origin of this software must not be misrepresented;</span>
<a name="l00014"></a>00014 <span class="comment">// you must not claim that you wrote the original software.</span>
<a name="l00015"></a>00015 <span class="comment">// If you use this software in a product, an acknowledgment</span>
<a name="l00016"></a>00016 <span class="comment">// in the product documentation would be appreciated but is not required.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// 2. Altered source versions must be plainly marked as such,</span>
<a name="l00019"></a>00019 <span class="comment">// and must not be misrepresented as being the original software.</span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="comment">// 3. This notice may not be removed or altered from any source distribution.</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">// Headers</span>
<a name="l00028"></a>00028 <span class="comment"></span><span class="preprocessor">#include <SFML/Audio/SoundFileDefault.hpp></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <iostream></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <string.h></span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">namespace </span>sf
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keyword">namespace </span>priv
<a name="l00036"></a>00036 {
<a name="l00040"></a>00040 SoundFileDefault::SoundFileDefault() :
<a name="l00041"></a>00041 myFile(NULL)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045
<a name="l00046"></a>00046
<a name="l00050"></a>00050 SoundFileDefault::~SoundFileDefault()
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keywordflow">if</span> (myFile)
<a name="l00053"></a>00053 sf_close(myFile);
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00060"></a>00060 <span class="keywordtype">bool</span> SoundFileDefault::IsFileSupported(<span class="keyword">const</span> std::string& Filename, <span class="keywordtype">bool</span> Read)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (Read)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="comment">// Open the sound file</span>
<a name="l00065"></a>00065 SF_INFO FileInfos;
<a name="l00066"></a>00066 SNDFILE* File = sf_open(Filename.c_str(), SFM_READ, &FileInfos);
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keywordflow">if</span> (File)
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 sf_close(File);
<a name="l00071"></a>00071 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 <span class="keywordflow">else</span>
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 <span class="keywordflow">else</span>
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 <span class="comment">// Check the extension</span>
<a name="l00081"></a>00081 <span class="keywordflow">return</span> GetFormatFromFilename(Filename) != -1;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085
<a name="l00089"></a>00089 <span class="keywordtype">bool</span> SoundFileDefault::IsFileSupported(<span class="keyword">const</span> <span class="keywordtype">char</span>* Data, std::size_t SizeInBytes)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="comment">// Define the I/O custom functions for reading from memory</span>
<a name="l00092"></a>00092 SF_VIRTUAL_IO VirtualIO;
<a name="l00093"></a>00093 VirtualIO.get_filelen = &SoundFileDefault::MemoryGetLength;
<a name="l00094"></a>00094 VirtualIO.read = &SoundFileDefault::MemoryRead;
<a name="l00095"></a>00095 VirtualIO.seek = &SoundFileDefault::MemorySeek;
<a name="l00096"></a>00096 VirtualIO.tell = &SoundFileDefault::MemoryTell;
<a name="l00097"></a>00097 VirtualIO.write = &SoundFileDefault::MemoryWrite;
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">// Initialize the memory data</span>
<a name="l00100"></a>00100 MemoryInfos Memory;
<a name="l00101"></a>00101 Memory.DataStart = Data;
<a name="l00102"></a>00102 Memory.DataPtr = Data;
<a name="l00103"></a>00103 Memory.TotalSize = SizeInBytes;
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// Open the sound file</span>
<a name="l00106"></a>00106 SF_INFO FileInfos;
<a name="l00107"></a>00107 SNDFILE* File = sf_open_virtual(&VirtualIO, SFM_READ, &FileInfos, &Memory);
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (File)
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 sf_close(File);
<a name="l00112"></a>00112 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 <span class="keywordflow">else</span>
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120
<a name="l00124"></a>00124 <span class="keywordtype">bool</span> SoundFileDefault::OpenRead(<span class="keyword">const</span> std::string& Filename, std::size_t& NbSamples, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& ChannelsCount, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& SampleRate)
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 <span class="comment">// If the file is already opened, first close it</span>
<a name="l00127"></a>00127 <span class="keywordflow">if</span> (myFile)
<a name="l00128"></a>00128 sf_close(myFile);
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="comment">// Open the sound file</span>
<a name="l00131"></a>00131 SF_INFO FileInfos;
<a name="l00132"></a>00132 myFile = sf_open(Filename.c_str(), SFM_READ, &FileInfos);
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (!myFile)
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 std::cerr << <span class="stringliteral">"Failed to read sound file \""</span> << Filename << <span class="stringliteral">"\""</span> << std::endl;
<a name="l00136"></a>00136 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="comment">// Set the sound parameters</span>
<a name="l00140"></a>00140 ChannelsCount = FileInfos.channels;
<a name="l00141"></a>00141 SampleRate = FileInfos.samplerate;
<a name="l00142"></a>00142 NbSamples = <span class="keyword">static_cast<</span>std::size_t<span class="keyword">></span>(FileInfos.frames) * ChannelsCount;
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147
<a name="l00151"></a>00151 <span class="keywordtype">bool</span> SoundFileDefault::OpenRead(<span class="keyword">const</span> <span class="keywordtype">char</span>* Data, std::size_t SizeInBytes, std::size_t& NbSamples, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& ChannelsCount, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& SampleRate)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="comment">// If the file is already opened, first close it</span>
<a name="l00154"></a>00154 <span class="keywordflow">if</span> (myFile)
<a name="l00155"></a>00155 sf_close(myFile);
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="comment">// Define the I/O custom functions for reading from memory</span>
<a name="l00158"></a>00158 SF_VIRTUAL_IO VirtualIO;
<a name="l00159"></a>00159 VirtualIO.get_filelen = &SoundFileDefault::MemoryGetLength;
<a name="l00160"></a>00160 VirtualIO.read = &SoundFileDefault::MemoryRead;
<a name="l00161"></a>00161 VirtualIO.seek = &SoundFileDefault::MemorySeek;
<a name="l00162"></a>00162 VirtualIO.tell = &SoundFileDefault::MemoryTell;
<a name="l00163"></a>00163 VirtualIO.write = &SoundFileDefault::MemoryWrite;
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="comment">// Initialize the memory data</span>
<a name="l00166"></a>00166 myMemory.DataStart = Data;
<a name="l00167"></a>00167 myMemory.DataPtr = Data;
<a name="l00168"></a>00168 myMemory.TotalSize = SizeInBytes;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="comment">// Open the sound file</span>
<a name="l00171"></a>00171 SF_INFO FileInfos;
<a name="l00172"></a>00172 myFile = sf_open_virtual(&VirtualIO, SFM_READ, &FileInfos, &myMemory);
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (!myFile)
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 std::cerr << <span class="stringliteral">"Failed to read sound file from memory"</span> << std::endl;
<a name="l00176"></a>00176 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="comment">// Set the sound parameters</span>
<a name="l00180"></a>00180 ChannelsCount = FileInfos.channels;
<a name="l00181"></a>00181 SampleRate = FileInfos.samplerate;
<a name="l00182"></a>00182 NbSamples = <span class="keyword">static_cast<</span>std::size_t<span class="keyword">></span>(FileInfos.frames) * ChannelsCount;
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00185"></a>00185 }
<a name="l00186"></a>00186
<a name="l00187"></a>00187
<a name="l00191"></a>00191 <span class="keywordtype">bool</span> SoundFileDefault::OpenWrite(<span class="keyword">const</span> std::string& Filename, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ChannelsCount, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> SampleRate)
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193 <span class="comment">// If the file is already opened, first close it</span>
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (myFile)
<a name="l00195"></a>00195 sf_close(myFile);
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="comment">// Find the right format according to the file extension</span>
<a name="l00198"></a>00198 <span class="keywordtype">int</span> Format = GetFormatFromFilename(Filename);
<a name="l00199"></a>00199 <span class="keywordflow">if</span> (Format == -1)
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 <span class="comment">// Error : unrecognized extension</span>
<a name="l00202"></a>00202 std::cerr << <span class="stringliteral">"Failed to create sound file \""</span> << Filename << <span class="stringliteral">"\" : unknown format"</span> << std::endl;
<a name="l00203"></a>00203 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="comment">// Fill the sound infos with parameters</span>
<a name="l00207"></a>00207 SF_INFO FileInfos;
<a name="l00208"></a>00208 FileInfos.channels = ChannelsCount;
<a name="l00209"></a>00209 FileInfos.samplerate = SampleRate;
<a name="l00210"></a>00210 FileInfos.format = Format | SF_FORMAT_PCM_16;
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="comment">// Open the sound file for writing</span>
<a name="l00213"></a>00213 myFile = sf_open(Filename.c_str(), SFM_WRITE, &FileInfos);
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (!myFile)
<a name="l00215"></a>00215 {
<a name="l00216"></a>00216 std::cerr << <span class="stringliteral">"Failed to create sound file \""</span> << Filename << <span class="stringliteral">"\""</span> << std::endl;
<a name="l00217"></a>00217 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223
<a name="l00227"></a>00227 std::size_t SoundFileDefault::Read(Int16* Data, std::size_t NbSamples)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (myFile && Data && NbSamples)
<a name="l00230"></a>00230 <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>std::size_t<span class="keyword">></span>(sf_read_short(myFile, Data, NbSamples));
<a name="l00231"></a>00231 <span class="keywordflow">else</span>
<a name="l00232"></a>00232 <span class="keywordflow">return</span> 0;
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00239"></a>00239 <span class="keywordtype">void</span> SoundFileDefault::Write(<span class="keyword">const</span> Int16* Data, std::size_t NbSamples)
<a name="l00240"></a>00240 {
<a name="l00241"></a>00241 <span class="keywordflow">if</span> (myFile && Data && NbSamples)
<a name="l00242"></a>00242 sf_write_short(myFile, Data, NbSamples);
<a name="l00243"></a>00243 }
<a name="l00244"></a>00244
<a name="l00245"></a>00245
<a name="l00250"></a>00250 <span class="keywordtype">int</span> SoundFileDefault::GetFormatFromFilename(<span class="keyword">const</span> std::string& Filename)
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 <span class="comment">// Extract the extension</span>
<a name="l00253"></a>00253 std::string Ext = <span class="stringliteral">"wav"</span>;
<a name="l00254"></a>00254 std::string::size_type Pos = Filename.find_last_of(<span class="stringliteral">"."</span>);
<a name="l00255"></a>00255 <span class="keywordflow">if</span> (Pos != std::string::npos)
<a name="l00256"></a>00256 Ext = Filename.substr(Pos + 1);
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="comment">// Match every supported extension with its format constant</span>
<a name="l00259"></a>00259 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"wav"</span> || Ext == <span class="stringliteral">"WAV"</span> ) <span class="keywordflow">return</span> SF_FORMAT_WAV;
<a name="l00260"></a>00260 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"aif"</span> || Ext == <span class="stringliteral">"AIF"</span> ) <span class="keywordflow">return</span> SF_FORMAT_AIFF;
<a name="l00261"></a>00261 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"aiff"</span> || Ext == <span class="stringliteral">"AIFF"</span>) <span class="keywordflow">return</span> SF_FORMAT_AIFF;
<a name="l00262"></a>00262 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"au"</span> || Ext == <span class="stringliteral">"AU"</span> ) <span class="keywordflow">return</span> SF_FORMAT_AU;
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"raw"</span> || Ext == <span class="stringliteral">"RAW"</span> ) <span class="keywordflow">return</span> SF_FORMAT_RAW;
<a name="l00264"></a>00264 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"paf"</span> || Ext == <span class="stringliteral">"PAF"</span> ) <span class="keywordflow">return</span> SF_FORMAT_PAF;
<a name="l00265"></a>00265 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"svx"</span> || Ext == <span class="stringliteral">"SVX"</span> ) <span class="keywordflow">return</span> SF_FORMAT_SVX;
<a name="l00266"></a>00266 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"voc"</span> || Ext == <span class="stringliteral">"VOC"</span> ) <span class="keywordflow">return</span> SF_FORMAT_VOC;
<a name="l00267"></a>00267 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"sf"</span> || Ext == <span class="stringliteral">"SF"</span> ) <span class="keywordflow">return</span> SF_FORMAT_IRCAM;
<a name="l00268"></a>00268 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"w64"</span> || Ext == <span class="stringliteral">"W64"</span> ) <span class="keywordflow">return</span> SF_FORMAT_W64;
<a name="l00269"></a>00269 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"mat4"</span> || Ext == <span class="stringliteral">"MAT4"</span>) <span class="keywordflow">return</span> SF_FORMAT_MAT4;
<a name="l00270"></a>00270 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"mat5"</span> || Ext == <span class="stringliteral">"MAT5"</span>) <span class="keywordflow">return</span> SF_FORMAT_MAT5;
<a name="l00271"></a>00271 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"pvf"</span> || Ext == <span class="stringliteral">"PVF"</span> ) <span class="keywordflow">return</span> SF_FORMAT_PVF;
<a name="l00272"></a>00272 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"htk"</span> || Ext == <span class="stringliteral">"HTK"</span> ) <span class="keywordflow">return</span> SF_FORMAT_HTK;
<a name="l00273"></a>00273 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"caf"</span> || Ext == <span class="stringliteral">"CAF"</span> ) <span class="keywordflow">return</span> SF_FORMAT_CAF;
<a name="l00274"></a>00274 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"nist"</span> || Ext == <span class="stringliteral">"NIST"</span>) <span class="keywordflow">return</span> SF_FORMAT_NIST; <span class="comment">// SUPPORTED ?</span>
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"sds"</span> || Ext == <span class="stringliteral">"SDS"</span> ) <span class="keywordflow">return</span> SF_FORMAT_SDS; <span class="comment">// SUPPORTED ?</span>
<a name="l00276"></a>00276 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"avr"</span> || Ext == <span class="stringliteral">"AVR"</span> ) <span class="keywordflow">return</span> SF_FORMAT_AVR; <span class="comment">// SUPPORTED ?</span>
<a name="l00277"></a>00277 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"sd2"</span> || Ext == <span class="stringliteral">"SD2"</span> ) <span class="keywordflow">return</span> SF_FORMAT_SD2; <span class="comment">// SUPPORTED ?</span>
<a name="l00278"></a>00278 <span class="keywordflow">if</span> (Ext == <span class="stringliteral">"flac"</span> || Ext == <span class="stringliteral">"FLAC"</span>) <span class="keywordflow">return</span> SF_FORMAT_FLAC; <span class="comment">// SUPPORTED ?</span>
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="keywordflow">return</span> -1;
<a name="l00281"></a>00281 }
<a name="l00282"></a>00282
<a name="l00283"></a>00283
<a name="l00288"></a>00288 sf_count_t SoundFileDefault::MemoryGetLength(<span class="keywordtype">void</span>* UserData)
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 MemoryInfos* Memory = <span class="keyword">static_cast<</span>MemoryInfos*<span class="keyword">></span>(UserData);
<a name="l00291"></a>00291
<a name="l00292"></a>00292 <span class="keywordflow">return</span> Memory->TotalSize;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294 sf_count_t SoundFileDefault::MemoryRead(<span class="keywordtype">void</span>* Ptr, sf_count_t Count, <span class="keywordtype">void</span>* UserData)
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 MemoryInfos* Memory = <span class="keyword">static_cast<</span>MemoryInfos*<span class="keyword">></span>(UserData);
<a name="l00297"></a>00297
<a name="l00298"></a>00298 sf_count_t Position = Memory->DataPtr - Memory->DataStart;
<a name="l00299"></a>00299 <span class="keywordflow">if</span> (Position + Count >= Memory->TotalSize)
<a name="l00300"></a>00300 Count = Memory->TotalSize - Position;
<a name="l00301"></a>00301
<a name="l00302"></a>00302 memcpy(Ptr, Memory->DataPtr, static_cast<std::size_t>(Count));
<a name="l00303"></a>00303
<a name="l00304"></a>00304 Memory->DataPtr += Count;
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <span class="keywordflow">return</span> Count;
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308 sf_count_t SoundFileDefault::MemorySeek(sf_count_t Offset, <span class="keywordtype">int</span> Whence, <span class="keywordtype">void</span>* UserData)
<a name="l00309"></a>00309 {
<a name="l00310"></a>00310 MemoryInfos* Memory = <span class="keyword">static_cast<</span>MemoryInfos*<span class="keyword">></span>(UserData);
<a name="l00311"></a>00311
<a name="l00312"></a>00312 sf_count_t Position = 0;
<a name="l00313"></a>00313 <span class="keywordflow">switch</span> (Whence)
<a name="l00314"></a>00314 {
<a name="l00315"></a>00315 <span class="keywordflow">case</span> SEEK_SET :
<a name="l00316"></a>00316 Position = Offset;
<a name="l00317"></a>00317 <span class="keywordflow">break</span>;
<a name="l00318"></a>00318 <span class="keywordflow">case</span> SEEK_CUR :
<a name="l00319"></a>00319 Position = Memory->DataPtr - Memory->DataStart + Offset;
<a name="l00320"></a>00320 <span class="keywordflow">break</span>;
<a name="l00321"></a>00321 <span class="keywordflow">case</span> SEEK_END :
<a name="l00322"></a>00322 Position = Memory->TotalSize - Offset;
<a name="l00323"></a>00323 <span class="keywordflow">break</span>;
<a name="l00324"></a>00324 <span class="keywordflow">default</span> :
<a name="l00325"></a>00325 Position = 0;
<a name="l00326"></a>00326 <span class="keywordflow">break</span>;
<a name="l00327"></a>00327 }
<a name="l00328"></a>00328
<a name="l00329"></a>00329 <span class="keywordflow">if</span> (Position >= Memory->TotalSize)
<a name="l00330"></a>00330 Position = Memory->TotalSize - 1;
<a name="l00331"></a>00331 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (Position < 0)
<a name="l00332"></a>00332 Position = 0;
<a name="l00333"></a>00333
<a name="l00334"></a>00334 Memory->DataPtr = Memory->DataStart + Position;
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <span class="keywordflow">return</span> Position;
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338 sf_count_t SoundFileDefault::MemoryTell(<span class="keywordtype">void</span>* UserData)
<a name="l00339"></a>00339 {
<a name="l00340"></a>00340 MemoryInfos* Memory = <span class="keyword">static_cast<</span>MemoryInfos*<span class="keyword">></span>(UserData);
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="keywordflow">return</span> Memory->DataPtr - Memory->DataStart;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344 sf_count_t SoundFileDefault::MemoryWrite(<span class="keyword">const</span> <span class="keywordtype">void</span>*, sf_count_t, <span class="keywordtype">void</span>*)
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="keywordflow">return</span> 0;
<a name="l00347"></a>00347 }
<a name="l00348"></a>00348
<a name="l00349"></a>00349
<a name="l00350"></a>00350 } <span class="comment">// namespace priv</span>
<a name="l00351"></a>00351
<a name="l00352"></a>00352 } <span class="comment">// namespace sf</span>
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