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<div class="title">midfile.cc</div>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment">    midfile.cc - function which reads a midi file,and creates the track classes</span>
<a name="l00004"></a>00004 <span class="comment">    This file is part of LibKMid 0.9.5</span>
<a name="l00005"></a>00005 <span class="comment">    Copyright (C) 1997,98,99,2000  Antonio Larrosa Jimenez</span>
<a name="l00006"></a>00006 <span class="comment">    LibKMid&#39;s homepage : http://www.arrakis.es/~rlarrosa/libkmid.html</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment">    This library is free software; you can redistribute it and/or</span>
<a name="l00009"></a>00009 <span class="comment">    modify it under the terms of the GNU Library General Public</span>
<a name="l00010"></a>00010 <span class="comment">    License as published by the Free Software Foundation; either</span>
<a name="l00011"></a>00011 <span class="comment">    version 2 of the License, or (at your option) any later version.</span>
<a name="l00012"></a>00012 <span class="comment"> </span>
<a name="l00013"></a>00013 <span class="comment">    This library is distributed in the hope that it will be useful,</span>
<a name="l00014"></a>00014 <span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00015"></a>00015 <span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU</span>
<a name="l00016"></a>00016 <span class="comment">    Library General Public License for more details.</span>
<a name="l00017"></a>00017 <span class="comment"> </span>
<a name="l00018"></a>00018 <span class="comment">    You should have received a copy of the GNU Library General Public License</span>
<a name="l00019"></a>00019 <span class="comment">    along with this library; see the file COPYING.LIB.  If not, write to</span>
<a name="l00020"></a>00020 <span class="comment">    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="l00021"></a>00021 <span class="comment">    Boston, MA 02110-1301, USA.</span>
<a name="l00022"></a>00022 <span class="comment"></span>
<a name="l00023"></a>00023 <span class="comment">    Send comments and bug fixes to Antonio Larrosa &lt;larrosa@kde.org&gt;</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment">***************************************************************************/</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &quot;midfile.h&quot;</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &quot;sndcard.h&quot;</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include &quot;midispec.h&quot;</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include &quot;mt32togm.h&quot;</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include &quot;sys/stat.h&quot;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;config.h&gt;</span>
<a name="l00036"></a>00036 
<a name="l00037"></a>00037 <span class="preprocessor">#include &lt;kprocess.h&gt;</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include &lt;qfile.h&gt;</span>
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="keywordtype">int</span> fsearch(FILE *fh,<span class="keyword">const</span> <span class="keywordtype">char</span> *text,<span class="keywordtype">long</span> *ptr);
<a name="l00041"></a>00041 
<a name="l00042"></a>00042 <span class="comment">/* This function gives the metronome tempo, from a tempo data as found in</span>
<a name="l00043"></a>00043 <span class="comment">   a midi file */</span>
<a name="l00044"></a>00044 <span class="keywordtype">double</span> tempoToMetronomeTempo(ulong x)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046   <span class="keywordflow">return</span> 60/((double)x/1000000);
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048 
<a name="l00049"></a>00049 <span class="keywordtype">double</span> metronomeTempoToTempo(ulong x)
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051   <span class="keywordflow">return</span> ((<span class="keywordtype">double</span>)60*x)/1000000;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="keywordtype">int</span> uncompressFile(<span class="keyword">const</span> <span class="keywordtype">char</span> *gzname, <span class="keywordtype">char</span> *tmpname)
<a name="l00055"></a>00055   <span class="comment">// Returns 0 if OK, 1 if error (tmpname not set)</span>
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057   <a class="codeRef" href="qstring.html">QString</a> cmd(<span class="stringliteral">&quot;gzip -dc &quot;</span> + <a class="codeRef" doxygen="kdecore.tag:../../kdecore/html/" href="../../kdecore/html/classKProcess.html#a1ce049f3abcc805d6e5d44988451d32a">KProcess::quote</a>(gzname));
<a name="l00058"></a>00058   FILE *infile = popen( <a class="codeRef" href="qfile.html#encodeName">QFile::encodeName</a>(cmd).data(), <span class="stringliteral">&quot;r&quot;</span>);
<a name="l00059"></a>00059   <span class="keywordflow">if</span> (infile==NULL) {
<a name="l00060"></a>00060     fprintf(stderr,<span class="stringliteral">&quot;ERROR : popen failed : %s\n&quot;</span>,<a class="codeRef" href="qfile.html#encodeName">QFile::encodeName</a>(cmd).data());
<a name="l00061"></a>00061     <span class="keywordflow">return</span> 1;
<a name="l00062"></a>00062   }
<a name="l00063"></a>00063   strcpy(tmpname, <span class="stringliteral">&quot;/tmp/KMid.XXXXXXXXXX&quot;</span>);
<a name="l00064"></a>00064   <span class="keywordtype">int</span> fd = mkstemp(tmpname);
<a name="l00065"></a>00065   <span class="keywordflow">if</span> (fd == -1)
<a name="l00066"></a>00066   {
<a name="l00067"></a>00067     pclose(infile);
<a name="l00068"></a>00068     <span class="keywordflow">return</span> 1;
<a name="l00069"></a>00069   }
<a name="l00070"></a>00070   FILE *outfile= fdopen(fd,<span class="stringliteral">&quot;wb&quot;</span>);
<a name="l00071"></a>00071   <span class="keywordflow">if</span> (outfile==NULL)
<a name="l00072"></a>00072   {
<a name="l00073"></a>00073     pclose(infile);
<a name="l00074"></a>00074     <span class="keywordflow">return</span> 1;
<a name="l00075"></a>00075   }
<a name="l00076"></a>00076   <span class="keywordtype">int</span> n=getc(infile);
<a name="l00077"></a>00077   <span class="keywordflow">if</span> (n==EOF) 
<a name="l00078"></a>00078   {
<a name="l00079"></a>00079     pclose(infile);
<a name="l00080"></a>00080     fclose(outfile);
<a name="l00081"></a>00081     unlink(tmpname);
<a name="l00082"></a>00082     <span class="keywordflow">return</span> 1;
<a name="l00083"></a>00083   }
<a name="l00084"></a>00084   fputc(n,outfile);
<a name="l00085"></a>00085   <span class="keywordtype">int</span> buf[BUFSIZ];
<a name="l00086"></a>00086   n = fread(buf, 1, BUFSIZ, infile);
<a name="l00087"></a>00087   <span class="keywordflow">while</span> (n&gt;0)
<a name="l00088"></a>00088   {
<a name="l00089"></a>00089     fwrite(buf, 1, n, outfile);
<a name="l00090"></a>00090     n = fread(buf, 1, BUFSIZ, infile);
<a name="l00091"></a>00091   }
<a name="l00092"></a>00092 
<a name="l00093"></a>00093   pclose(infile);
<a name="l00094"></a>00094 
<a name="l00095"></a>00095   <span class="comment">//if (pclose(infile) != 0) fprintf(stderr,&quot;Error : pclose failed\n&quot;);</span>
<a name="l00096"></a>00096   <span class="comment">// Is it right for pclose to always fail ?</span>
<a name="l00097"></a>00097 
<a name="l00098"></a>00098   fclose(outfile);
<a name="l00099"></a>00099   <span class="keywordflow">return</span> 0;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 
<a name="l00102"></a>00102 <a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a> **readMidiFile( <span class="keyword">const</span> <span class="keywordtype">char</span> *name, <a class="code" href="structMidiFileInfo.html" title="Contains all the information about a MIDI file.">MidiFileInfo</a> *info, <span class="keywordtype">int</span> &amp;ok)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104   ok=1;
<a name="l00105"></a>00105   <a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a> **tracks;
<a name="l00106"></a>00106 
<a name="l00107"></a>00107   <span class="keyword">struct </span>stat buf;
<a name="l00108"></a>00108   <span class="keywordflow">if</span> (stat(name,&amp;buf) || !S_ISREG(buf.st_mode))
<a name="l00109"></a>00109   {
<a name="l00110"></a>00110     fprintf(stderr,<span class="stringliteral">&quot;ERROR: %s is not a regular file\n&quot;</span>,name);
<a name="l00111"></a>00111     ok=-6;
<a name="l00112"></a>00112     <span class="keywordflow">return</span> NULL;
<a name="l00113"></a>00113   }
<a name="l00114"></a>00114 
<a name="l00115"></a>00115   FILE *fh=fopen(name,<span class="stringliteral">&quot;rb&quot;</span>);
<a name="l00116"></a>00116   <span class="keywordflow">if</span> (fh==NULL) 
<a name="l00117"></a>00117   {
<a name="l00118"></a>00118     fprintf(stderr,<span class="stringliteral">&quot;ERROR: Can&#39;t open file %s\n&quot;</span>,name);
<a name="l00119"></a>00119     ok=-1;
<a name="l00120"></a>00120     <span class="keywordflow">return</span> NULL;
<a name="l00121"></a>00121   }
<a name="l00122"></a>00122   <span class="keywordtype">char</span> text[4];
<a name="l00123"></a>00123   text[0] = 0;
<a name="l00124"></a>00124   fread(text,1,4,fh);
<a name="l00125"></a>00125   <span class="keywordflow">if</span> ((strncmp(text,<span class="stringliteral">&quot;MThd&quot;</span>,4)!=0)&amp;&amp;(strcmp(&amp;name[strlen(name)-3],<span class="stringliteral">&quot;.gz&quot;</span>)==0))
<a name="l00126"></a>00126   { 
<a name="l00127"></a>00127     fclose(fh);
<a name="l00128"></a>00128     <span class="keywordtype">char</span> tempname[200];
<a name="l00129"></a>00129     fprintf(stderr,<span class="stringliteral">&quot;Trying to open zipped midi file...\n&quot;</span>);
<a name="l00130"></a>00130     <span class="keywordflow">if</span> (uncompressFile(name,tempname)!=0)
<a name="l00131"></a>00131     {
<a name="l00132"></a>00132       fprintf(stderr,<span class="stringliteral">&quot;ERROR: %s is not a (zipped) midi file\n&quot;</span>,name);
<a name="l00133"></a>00133       ok=-2;
<a name="l00134"></a>00134       <span class="keywordflow">return</span> NULL;
<a name="l00135"></a>00135     }
<a name="l00136"></a>00136     fh=fopen(tempname,<span class="stringliteral">&quot;rb&quot;</span>);
<a name="l00137"></a>00137     fread(text,1,4,fh);
<a name="l00138"></a>00138     unlink(tempname);
<a name="l00139"></a>00139   }
<a name="l00140"></a>00140 
<a name="l00141"></a>00141   <span class="keywordflow">if</span> (strncmp(text,<span class="stringliteral">&quot;MThd&quot;</span>,4)!=0)
<a name="l00142"></a>00142   {
<a name="l00143"></a>00143     fseek(fh,0,SEEK_SET);
<a name="l00144"></a>00144     <span class="keywordtype">long</span> pos;
<a name="l00145"></a>00145     <span class="keywordflow">if</span> (fsearch(fh,<span class="stringliteral">&quot;MThd&quot;</span>,&amp;pos)==0)
<a name="l00146"></a>00146     {   
<a name="l00147"></a>00147       fclose(fh);
<a name="l00148"></a>00148       fprintf(stderr,<span class="stringliteral">&quot;ERROR: %s is not a midi file.\n&quot;</span>,name);
<a name="l00149"></a>00149       ok=-2;
<a name="l00150"></a>00150       <span class="keywordflow">return</span> NULL;
<a name="l00151"></a>00151     }
<a name="l00152"></a>00152     fseek(fh,pos,SEEK_SET);
<a name="l00153"></a>00153     fread(text,1,4,fh);
<a name="l00154"></a>00154   }
<a name="l00155"></a>00155   <span class="keywordtype">long</span> header_size=readLong(fh);
<a name="l00156"></a>00156   info-&gt;<a class="code" href="structMidiFileInfo.html#a020d679dbff23e7e763f2c7a1a212393" title="Format of MIDI file.">format</a>=readShort(fh);
<a name="l00157"></a>00157   info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>=readShort(fh);
<a name="l00158"></a>00158   info-&gt;<a class="code" href="structMidiFileInfo.html#ac3d57b8e06f2bd0ccdbc84c1a216d9cf" title="Ticks per cuarter note.">ticksPerCuarterNote</a>=readShort(fh);
<a name="l00159"></a>00159   <span class="keywordflow">if</span> (info-&gt;<a class="code" href="structMidiFileInfo.html#ac3d57b8e06f2bd0ccdbc84c1a216d9cf" title="Ticks per cuarter note.">ticksPerCuarterNote</a>&lt;0)
<a name="l00160"></a>00160   {
<a name="l00161"></a>00161     fprintf(stderr,<span class="stringliteral">&quot;ERROR: Ticks per cuarter note is negative !\n&quot;</span>);
<a name="l00162"></a>00162     fprintf(stderr,<span class="stringliteral">&quot;Please report this error to : larrosa@kde.org\n&quot;</span>);
<a name="l00163"></a>00163     fclose(fh);
<a name="l00164"></a>00164     ok=-3;
<a name="l00165"></a>00165     <span class="keywordflow">return</span> NULL;
<a name="l00166"></a>00166   }
<a name="l00167"></a>00167   <span class="keywordflow">if</span> (header_size&gt;6) fseek(fh,header_size-6,SEEK_CUR);
<a name="l00168"></a>00168   tracks=<span class="keyword">new</span> <a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a>*[info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>];
<a name="l00169"></a>00169   <span class="keywordflow">if</span> (tracks==NULL)
<a name="l00170"></a>00170   {
<a name="l00171"></a>00171     fprintf(stderr,<span class="stringliteral">&quot;ERROR: Not enough memory\n&quot;</span>);
<a name="l00172"></a>00172     fclose(fh);
<a name="l00173"></a>00173     ok=-4;
<a name="l00174"></a>00174     <span class="keywordflow">return</span> NULL;
<a name="l00175"></a>00175   }
<a name="l00176"></a>00176   <span class="keywordtype">int</span> i=0;
<a name="l00177"></a>00177   <span class="keywordflow">while</span> (i&lt;info-&gt;ntracks)
<a name="l00178"></a>00178   {
<a name="l00179"></a>00179     fread(text,1,4,fh);
<a name="l00180"></a>00180     <span class="keywordflow">if</span> (strncmp(text,<span class="stringliteral">&quot;MTrk&quot;</span>,4)!=0)
<a name="l00181"></a>00181     {
<a name="l00182"></a>00182       fprintf(stderr,<span class="stringliteral">&quot;ERROR: Not a well built midi file\n&quot;</span>);
<a name="l00183"></a>00183       fprintf(stderr,<span class="stringliteral">&quot;%s&quot;</span>,text);
<a name="l00184"></a>00184       fclose(fh);
<a name="l00185"></a>00185       ok=-5;
<a name="l00186"></a>00186       <span class="keywordflow">return</span> NULL;
<a name="l00187"></a>00187     }
<a name="l00188"></a>00188     tracks[i]=<span class="keyword">new</span> <a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a>(fh,info-&gt;<a class="code" href="structMidiFileInfo.html#ac3d57b8e06f2bd0ccdbc84c1a216d9cf" title="Ticks per cuarter note.">ticksPerCuarterNote</a>,i);
<a name="l00189"></a>00189     <span class="keywordflow">if</span> (tracks[i]==NULL)
<a name="l00190"></a>00190     {
<a name="l00191"></a>00191       fprintf(stderr,<span class="stringliteral">&quot;ERROR: Not enough memory&quot;</span>);
<a name="l00192"></a>00192       fclose(fh);
<a name="l00193"></a>00193       ok=-4;
<a name="l00194"></a>00194       <span class="keywordflow">return</span> NULL;
<a name="l00195"></a>00195     }
<a name="l00196"></a>00196     i++;
<a name="l00197"></a>00197   }
<a name="l00198"></a>00198 
<a name="l00199"></a>00199   fclose(fh);
<a name="l00200"></a>00200 
<a name="l00201"></a>00201   <span class="keywordflow">return</span> tracks;
<a name="l00202"></a>00202 
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204 
<a name="l00205"></a>00205 <span class="keywordtype">void</span> parseInfoData(<a class="code" href="structMidiFileInfo.html" title="Contains all the information about a MIDI file.">MidiFileInfo</a> *info,<a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a> **tracks,<span class="keywordtype">float</span> ratioTempo)
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 
<a name="l00208"></a>00208   info-&gt;<a class="code" href="structMidiFileInfo.html#a1b5f67426b433c9904a22682404c98f2" title="Total number of MIDI ticks.">ticksTotal</a>=0;
<a name="l00209"></a>00209   info-&gt;<a class="code" href="structMidiFileInfo.html#a2f69180b2071523b572854db7aea1486" title="Total number of milliseconds.">millisecsTotal</a>=0.0;
<a name="l00210"></a>00210   info-&gt;ticksPlayed=0;
<a name="l00211"></a>00211   <span class="keywordtype">int</span> i;
<a name="l00212"></a>00212   <span class="keywordflow">for</span> (i=0;i&lt;256;i++)
<a name="l00213"></a>00213   {
<a name="l00214"></a>00214     info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[i]=0;
<a name="l00215"></a>00215   }
<a name="l00216"></a>00216 
<a name="l00217"></a>00217   <span class="keywordtype">int</span> parsing=1;
<a name="l00218"></a>00218   <span class="keywordtype">int</span> trk,minTrk;
<a name="l00219"></a>00219   ulong tempo=(ulong)(500000 * ratioTempo);
<a name="l00220"></a>00220 
<a name="l00221"></a>00221 <span class="preprocessor">#ifdef MIDFILEDEBUG</span>
<a name="l00222"></a>00222 <span class="preprocessor"></span>  printf(<span class="stringliteral">&quot;Parsing 1 ...\n&quot;</span>);
<a name="l00223"></a>00223 <span class="preprocessor">#endif</span>
<a name="l00224"></a>00224 <span class="preprocessor"></span>
<a name="l00225"></a>00225   <span class="keywordtype">int</span> pgminchannel[16];
<a name="l00226"></a>00226   <span class="keywordflow">for</span> (i=0;i&lt;16;i++) 
<a name="l00227"></a>00227   {
<a name="l00228"></a>00228     pgminchannel[i]=0;
<a name="l00229"></a>00229   }
<a name="l00230"></a>00230 
<a name="l00231"></a>00231   <span class="keywordtype">int</span> j;
<a name="l00232"></a>00232   <span class="keywordflow">for</span> (i=0;i&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;i++)
<a name="l00233"></a>00233   {
<a name="l00234"></a>00234     tracks[i]-&gt;<a class="code" href="classMidiTrack.html#a1066b85a0a6835a7243ff07a6362a931" title="Initializes the iterator.">init</a>();
<a name="l00235"></a>00235     tracks[i]-&gt;<a class="code" href="classMidiTrack.html#ae299d7d5d937e69dda16c36f9ff9498a" title="Change the tempo of the song.">changeTempo</a>(tempo);
<a name="l00236"></a>00236   }
<a name="l00237"></a>00237   <span class="keywordtype">double</span> prevms=0;
<a name="l00238"></a>00238   <span class="keywordtype">double</span> minTime=0;
<a name="l00239"></a>00239   <span class="keywordtype">double</span> maxTime;
<a name="l00240"></a>00240   <a class="code" href="structMidiEvent.html" title="An structure that represents a MIDI event.">MidiEvent</a> *ev=<span class="keyword">new</span> <a class="code" href="structMidiEvent.html" title="An structure that represents a MIDI event.">MidiEvent</a>;
<a name="l00241"></a>00241   <span class="keywordflow">while</span> (parsing)
<a name="l00242"></a>00242   {
<a name="l00243"></a>00243     prevms=minTime;
<a name="l00244"></a>00244     trk=0;
<a name="l00245"></a>00245     minTrk=0;
<a name="l00246"></a>00246     maxTime=minTime + 2 * 60000L;
<a name="l00247"></a>00247     minTime=maxTime;
<a name="l00248"></a>00248     <span class="keywordflow">while</span> (trk&lt;info-&gt;ntracks)
<a name="l00249"></a>00249     {
<a name="l00250"></a>00250       <span class="keywordflow">if</span> (tracks[trk]-&gt;absMsOfNextEvent()&lt;minTime)
<a name="l00251"></a>00251       {
<a name="l00252"></a>00252     minTrk=trk;
<a name="l00253"></a>00253     minTime=tracks[minTrk]-&gt;<a class="code" href="classMidiTrack.html#afae662342050ef7a5621af73a45dffb5" title="Returns the absolute number of milliseconds of the next event.">absMsOfNextEvent</a>();
<a name="l00254"></a>00254       }
<a name="l00255"></a>00255       trk++;
<a name="l00256"></a>00256     }
<a name="l00257"></a>00257     <span class="keywordflow">if</span> ((minTime==maxTime))
<a name="l00258"></a>00258     {
<a name="l00259"></a>00259       parsing=0;
<a name="l00260"></a>00260 <span class="preprocessor">#ifdef MIDFILEDEBUG</span>
<a name="l00261"></a>00261 <span class="preprocessor"></span>      printf(<span class="stringliteral">&quot;END of parsing\n&quot;</span>);
<a name="l00262"></a>00262 <span class="preprocessor">#endif</span>
<a name="l00263"></a>00263 <span class="preprocessor"></span>    }
<a name="l00264"></a>00264     <span class="keywordflow">else</span>
<a name="l00265"></a>00265     {
<a name="l00266"></a>00266       trk=0;
<a name="l00267"></a>00267       <span class="keywordflow">while</span> (trk&lt;info-&gt;ntracks)
<a name="l00268"></a>00268       {
<a name="l00269"></a>00269     tracks[trk]-&gt;<a class="code" href="classMidiTrack.html#a3853ed58cfeddeb48a3ec9c00875d984" title="Returns the current millisecond which the iterator is at.">currentMs</a>(minTime);
<a name="l00270"></a>00270     trk++;
<a name="l00271"></a>00271       }
<a name="l00272"></a>00272     }
<a name="l00273"></a>00273     trk=minTrk;
<a name="l00274"></a>00274     tracks[trk]-&gt;<a class="code" href="classMidiTrack.html#a0116697d2b63b1369b980dcbb12ce9b4" title="Reads the event at the iterator position, and puts it on the structure pointed to by ev...">readEvent</a>(ev);
<a name="l00275"></a>00275 
<a name="l00276"></a>00276     <span class="keywordflow">switch</span> (ev-&gt;<a class="code" href="structMidiEvent.html#a3560e3a72ebad44fb1e66497806cbff1" title="MIDI Command.">command</a>)
<a name="l00277"></a>00277     {
<a name="l00278"></a>00278       <span class="keywordflow">case</span> (MIDI_NOTEON) : 
<a name="l00279"></a>00279     <span class="keywordflow">if</span> (ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>!=PERCUSSION_CHANNEL)
<a name="l00280"></a>00280       info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[pgminchannel[ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>]]++;
<a name="l00281"></a>00281     <span class="keywordflow">else</span>
<a name="l00282"></a>00282       info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[ev-&gt;<a class="code" href="structMidiEvent.html#a82a0ff0d4ff1972cf946bc959b0d15c1" title="Note.">note</a>+128]++;
<a name="l00283"></a>00283     <span class="keywordflow">break</span>;
<a name="l00284"></a>00284       <span class="keywordflow">case</span> (MIDI_PGM_CHANGE) :
<a name="l00285"></a>00285     pgminchannel[ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>]=(ev-&gt;<a class="code" href="structMidiEvent.html#aacb68e9fb8dbef8f788fc4be25c426ee" title="Patch (if command was a change patch command)">patch</a>);
<a name="l00286"></a>00286     <span class="keywordflow">break</span>;
<a name="l00287"></a>00287       <span class="keywordflow">case</span> (MIDI_SYSTEM_PREFIX) :
<a name="l00288"></a>00288     <span class="keywordflow">if</span> (((ev-&gt;<a class="code" href="structMidiEvent.html#a3560e3a72ebad44fb1e66497806cbff1" title="MIDI Command.">command</a>|ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>)==META_EVENT)&amp;&amp;(ev-&gt;<a class="code" href="structMidiEvent.html#ab99f7ad7a7f2cc82e2e803dff701ef09" title="Data 1.">d1</a>==ME_SET_TEMPO))
<a name="l00289"></a>00289     {
<a name="l00290"></a>00290       tempo=(ulong)(((ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[0]&lt;&lt;16)|(ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[1]&lt;&lt;8)|(ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[2])) * ratioTempo);
<a name="l00291"></a>00291       <span class="keywordflow">for</span> (j=0;j&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;j++)
<a name="l00292"></a>00292       {
<a name="l00293"></a>00293         tracks[j]-&gt;<a class="code" href="classMidiTrack.html#ae299d7d5d937e69dda16c36f9ff9498a" title="Change the tempo of the song.">changeTempo</a>(tempo);
<a name="l00294"></a>00294       }
<a name="l00295"></a>00295     }
<a name="l00296"></a>00296     <span class="keywordflow">break</span>;
<a name="l00297"></a>00297     }
<a name="l00298"></a>00298   }
<a name="l00299"></a>00299 
<a name="l00300"></a>00300   <span class="keyword">delete</span> ev;
<a name="l00301"></a>00301   info-&gt;<a class="code" href="structMidiFileInfo.html#a2f69180b2071523b572854db7aea1486" title="Total number of milliseconds.">millisecsTotal</a>=prevms;
<a name="l00302"></a>00302 
<a name="l00303"></a>00303   <span class="keywordflow">for</span> (i=0;i&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;i++)
<a name="l00304"></a>00304   {
<a name="l00305"></a>00305     tracks[i]-&gt;<a class="code" href="classMidiTrack.html#a1066b85a0a6835a7243ff07a6362a931" title="Initializes the iterator.">init</a>();
<a name="l00306"></a>00306   }
<a name="l00307"></a>00307 
<a name="l00308"></a>00308 <span class="preprocessor">#ifdef MIDFILEDEBUG</span>
<a name="l00309"></a>00309 <span class="preprocessor"></span>  printf(<span class="stringliteral">&quot;info.ticksTotal = %ld \n&quot;</span>,info-&gt;<a class="code" href="structMidiFileInfo.html#a1b5f67426b433c9904a22682404c98f2" title="Total number of MIDI ticks.">ticksTotal</a>);
<a name="l00310"></a>00310   printf(<span class="stringliteral">&quot;info.ticksPlayed= %ld \n&quot;</span>,info-&gt;ticksPlayed);
<a name="l00311"></a>00311   printf(<span class="stringliteral">&quot;info.millisecsTotal  = %g \n&quot;</span>,info-&gt;<a class="code" href="structMidiFileInfo.html#a2f69180b2071523b572854db7aea1486" title="Total number of milliseconds.">millisecsTotal</a>);
<a name="l00312"></a>00312   printf(<span class="stringliteral">&quot;info.TicksPerCN = %d \n&quot;</span>,info-&gt;<a class="code" href="structMidiFileInfo.html#ac3d57b8e06f2bd0ccdbc84c1a216d9cf" title="Ticks per cuarter note.">ticksPerCuarterNote</a>);
<a name="l00313"></a>00313 <span class="preprocessor">#endif</span>
<a name="l00314"></a>00314 <span class="preprocessor"></span>
<a name="l00315"></a>00315 }
<a name="l00316"></a>00316 
<a name="l00317"></a>00317 
<a name="l00318"></a>00318 <span class="keywordtype">void</span> parsePatchesUsed(<a class="code" href="classMidiTrack.html" title="Stores a MIDI track.">MidiTrack</a> **tracks,<a class="code" href="structMidiFileInfo.html" title="Contains all the information about a MIDI file.">MidiFileInfo</a> *info,<span class="keywordtype">int</span> gm)
<a name="l00319"></a>00319 {
<a name="l00320"></a>00320   <span class="keywordtype">int</span> i;
<a name="l00321"></a>00321   <span class="keywordflow">for</span> (i=0;i&lt;256;i++)
<a name="l00322"></a>00322   {
<a name="l00323"></a>00323     info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[i]=0;
<a name="l00324"></a>00324   }
<a name="l00325"></a>00325   <span class="keywordtype">int</span> parsing=1;
<a name="l00326"></a>00326   <span class="keywordtype">int</span> trk,minTrk;
<a name="l00327"></a>00327   ulong tempo=500000;
<a name="l00328"></a>00328 
<a name="l00329"></a>00329 <span class="preprocessor">#ifdef MIDFILEDEBUG</span>
<a name="l00330"></a>00330 <span class="preprocessor"></span>  printf(<span class="stringliteral">&quot;Parsing for patches ...\n&quot;</span>);
<a name="l00331"></a>00331 <span class="preprocessor">#endif</span>
<a name="l00332"></a>00332 <span class="preprocessor"></span>
<a name="l00333"></a>00333   <span class="keywordtype">int</span> j;
<a name="l00334"></a>00334   <span class="keywordflow">for</span> (i=0;i&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;i++)
<a name="l00335"></a>00335   {
<a name="l00336"></a>00336     tracks[i]-&gt;<a class="code" href="classMidiTrack.html#a1066b85a0a6835a7243ff07a6362a931" title="Initializes the iterator.">init</a>();
<a name="l00337"></a>00337   }
<a name="l00338"></a>00338   <span class="keywordtype">double</span> prevms=0;
<a name="l00339"></a>00339   <span class="keywordtype">double</span> minTime=0;
<a name="l00340"></a>00340   <span class="keywordtype">double</span> maxTime;
<a name="l00341"></a>00341   ulong tmp;
<a name="l00342"></a>00342   <a class="code" href="structMidiEvent.html" title="An structure that represents a MIDI event.">MidiEvent</a> *ev=<span class="keyword">new</span> <a class="code" href="structMidiEvent.html" title="An structure that represents a MIDI event.">MidiEvent</a>;
<a name="l00343"></a>00343   <span class="keywordtype">int</span> pgminchannel[16];
<a name="l00344"></a>00344   <span class="keywordflow">for</span> (i=0;i&lt;16;i++)
<a name="l00345"></a>00345   {
<a name="l00346"></a>00346     pgminchannel[i]=0;
<a name="l00347"></a>00347   }
<a name="l00348"></a>00348 
<a name="l00349"></a>00349   <span class="keywordflow">while</span> (parsing)
<a name="l00350"></a>00350   {
<a name="l00351"></a>00351     prevms=minTime;
<a name="l00352"></a>00352     trk=0;
<a name="l00353"></a>00353     minTrk=0;
<a name="l00354"></a>00354     maxTime=minTime + 2 * 60000L;
<a name="l00355"></a>00355     minTime=maxTime;
<a name="l00356"></a>00356     <span class="keywordflow">while</span> (trk&lt;info-&gt;ntracks)
<a name="l00357"></a>00357     {
<a name="l00358"></a>00358       <span class="keywordflow">if</span> (tracks[trk]-&gt;absMsOfNextEvent()&lt;minTime)
<a name="l00359"></a>00359       {
<a name="l00360"></a>00360     minTrk=trk;
<a name="l00361"></a>00361     minTime=tracks[minTrk]-&gt;<a class="code" href="classMidiTrack.html#afae662342050ef7a5621af73a45dffb5" title="Returns the absolute number of milliseconds of the next event.">absMsOfNextEvent</a>();
<a name="l00362"></a>00362       }
<a name="l00363"></a>00363       trk++;
<a name="l00364"></a>00364     }
<a name="l00365"></a>00365     <span class="keywordflow">if</span> ((minTime==maxTime))
<a name="l00366"></a>00366     {
<a name="l00367"></a>00367       parsing=0;
<a name="l00368"></a>00368 <span class="preprocessor">#ifdef MIDFILEDEBUG</span>
<a name="l00369"></a>00369 <span class="preprocessor"></span>      printf(<span class="stringliteral">&quot;END of parsing for patches\n&quot;</span>);
<a name="l00370"></a>00370 <span class="preprocessor">#endif</span>
<a name="l00371"></a>00371 <span class="preprocessor"></span>    }
<a name="l00372"></a>00372     <span class="keywordflow">else</span>
<a name="l00373"></a>00373     {
<a name="l00374"></a>00374       trk=0;
<a name="l00375"></a>00375       <span class="keywordflow">while</span> (trk&lt;info-&gt;ntracks)
<a name="l00376"></a>00376       {
<a name="l00377"></a>00377     tracks[trk]-&gt;<a class="code" href="classMidiTrack.html#a3853ed58cfeddeb48a3ec9c00875d984" title="Returns the current millisecond which the iterator is at.">currentMs</a>(minTime);
<a name="l00378"></a>00378     trk++;
<a name="l00379"></a>00379       }
<a name="l00380"></a>00380     }
<a name="l00381"></a>00381     trk=minTrk;
<a name="l00382"></a>00382     tracks[trk]-&gt;<a class="code" href="classMidiTrack.html#a0116697d2b63b1369b980dcbb12ce9b4" title="Reads the event at the iterator position, and puts it on the structure pointed to by ev...">readEvent</a>(ev);
<a name="l00383"></a>00383     <span class="keywordflow">switch</span> (ev-&gt;<a class="code" href="structMidiEvent.html#a3560e3a72ebad44fb1e66497806cbff1" title="MIDI Command.">command</a>)
<a name="l00384"></a>00384     {
<a name="l00385"></a>00385       <span class="keywordflow">case</span> (MIDI_NOTEON) : 
<a name="l00386"></a>00386     <span class="keywordflow">if</span> (ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>!=PERCUSSION_CHANNEL)
<a name="l00387"></a>00387       info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[pgminchannel[ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>]]++;
<a name="l00388"></a>00388     <span class="keywordflow">else</span>
<a name="l00389"></a>00389       info-&gt;<a class="code" href="structMidiFileInfo.html#aa5c50847bd8f90427c0ea1d8ec1bd6a4" title="Patches used in the MIDI file.">patchesUsed</a>[ev-&gt;<a class="code" href="structMidiEvent.html#a82a0ff0d4ff1972cf946bc959b0d15c1" title="Note.">note</a>+128]++;
<a name="l00390"></a>00390     <span class="keywordflow">break</span>;
<a name="l00391"></a>00391       <span class="keywordflow">case</span> (MIDI_PGM_CHANGE) :
<a name="l00392"></a>00392     pgminchannel[ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>]=(gm==1)?(ev-&gt;<a class="code" href="structMidiEvent.html#aacb68e9fb8dbef8f788fc4be25c426ee" title="Patch (if command was a change patch command)">patch</a>):(MT32toGM[ev-&gt;<a class="code" href="structMidiEvent.html#aacb68e9fb8dbef8f788fc4be25c426ee" title="Patch (if command was a change patch command)">patch</a>]);
<a name="l00393"></a>00393     <span class="keywordflow">break</span>;
<a name="l00394"></a>00394       <span class="keywordflow">case</span> (MIDI_SYSTEM_PREFIX) :
<a name="l00395"></a>00395     <span class="keywordflow">if</span> (((ev-&gt;<a class="code" href="structMidiEvent.html#a3560e3a72ebad44fb1e66497806cbff1" title="MIDI Command.">command</a>|ev-&gt;<a class="code" href="structMidiEvent.html#a518e7efd3286ad81f7edbb6e1b908d9d" title="Channel.">chn</a>)==META_EVENT)&amp;&amp;(ev-&gt;<a class="code" href="structMidiEvent.html#ab99f7ad7a7f2cc82e2e803dff701ef09" title="Data 1.">d1</a>==ME_SET_TEMPO))
<a name="l00396"></a>00396     {
<a name="l00397"></a>00397       <span class="keywordflow">if</span> (tempoToMetronomeTempo(tmp=((ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[0]&lt;&lt;16)|(ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[1]&lt;&lt;8)|(ev-&gt;<a class="code" href="structMidiEvent.html#ad3534e436eb4129a153d0f6b1859b933" title="The data for commands like text, sysex, etc.">data</a>[2])))&gt;=8)
<a name="l00398"></a>00398       {
<a name="l00399"></a>00399         tempo=tmp;
<a name="l00400"></a>00400         <span class="comment">//                   printf(&quot;setTempo %ld\n&quot;,tempo);</span>
<a name="l00401"></a>00401         <span class="keywordflow">for</span> (j=0;j&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;j++)
<a name="l00402"></a>00402         {
<a name="l00403"></a>00403           tracks[j]-&gt;<a class="code" href="classMidiTrack.html#ae299d7d5d937e69dda16c36f9ff9498a" title="Change the tempo of the song.">changeTempo</a>(tempo);
<a name="l00404"></a>00404         }
<a name="l00405"></a>00405       }
<a name="l00406"></a>00406     }
<a name="l00407"></a>00407     <span class="keywordflow">break</span>;   
<a name="l00408"></a>00408     }
<a name="l00409"></a>00409   }
<a name="l00410"></a>00410 
<a name="l00411"></a>00411   <span class="keyword">delete</span> ev;
<a name="l00412"></a>00412 
<a name="l00413"></a>00413   <span class="keywordflow">for</span> (i=0;i&lt;info-&gt;<a class="code" href="structMidiFileInfo.html#aa56f8c64d32032c48ea1e70a703338bc" title="Number of tracks.">ntracks</a>;i++)
<a name="l00414"></a>00414   {
<a name="l00415"></a>00415     tracks[i]-&gt;<a class="code" href="classMidiTrack.html#a1066b85a0a6835a7243ff07a6362a931" title="Initializes the iterator.">init</a>();
<a name="l00416"></a>00416   }
<a name="l00417"></a>00417 
<a name="l00418"></a>00418 }
<a name="l00419"></a>00419 
<a name="l00420"></a>00420 <span class="keywordtype">int</span> fsearch(FILE *fh,<span class="keyword">const</span> <span class="keywordtype">char</span> *text,<span class="keywordtype">long</span> *ptr)
<a name="l00421"></a>00421   <span class="comment">// Search for &quot;text&quot; through the fh file and then returns :</span>
<a name="l00422"></a>00422   <span class="comment">// text MUST BE smaller than 256 characters</span>
<a name="l00423"></a>00423   <span class="comment">//   0 if not was found </span>
<a name="l00424"></a>00424   <span class="comment">//   1 if it was found and in ptr (if !=NULL) the position where text begins.</span>
<a name="l00425"></a>00425 {
<a name="l00426"></a>00426   <span class="keywordflow">if</span> ((text==NULL)||(text[0]==0)) <span class="keywordflow">return</span> 0;
<a name="l00427"></a>00427   <span class="keywordtype">char</span> buf[1024];
<a name="l00428"></a>00428   <span class="keywordtype">char</span> tmp[256];
<a name="l00429"></a>00429   <span class="keywordtype">long</span> pos;
<a name="l00430"></a>00430   <span class="keywordtype">int</span> l=strlen(text);
<a name="l00431"></a>00431   <span class="keywordtype">int</span> i,k,r;
<a name="l00432"></a>00432   <span class="keywordflow">while</span> (!feof(fh))
<a name="l00433"></a>00433   {
<a name="l00434"></a>00434     pos=ftell(fh);
<a name="l00435"></a>00435     k=fread(buf,1,1024,fh);
<a name="l00436"></a>00436     i=0;
<a name="l00437"></a>00437     <span class="keywordflow">while</span> (i&lt;k)
<a name="l00438"></a>00438     {
<a name="l00439"></a>00439       <span class="keywordflow">if</span> (buf[i]==text[0])
<a name="l00440"></a>00440       {
<a name="l00441"></a>00441     <span class="keywordflow">if</span> (k-i&gt;=l)
<a name="l00442"></a>00442       r=strncmp(text,&amp;buf[i],l);
<a name="l00443"></a>00443     <span class="keywordflow">else</span>
<a name="l00444"></a>00444     {
<a name="l00445"></a>00445       fseek(fh,pos+i,SEEK_SET);
<a name="l00446"></a>00446       <span class="keywordflow">if</span> (fread(tmp,1,l,fh)&lt;(uint)l) <span class="keywordflow">return</span> 0;
<a name="l00447"></a>00447       fseek(fh,pos+k,SEEK_SET);
<a name="l00448"></a>00448       r=strncmp(text,tmp,l);
<a name="l00449"></a>00449     }
<a name="l00450"></a>00450     <span class="keywordflow">if</span> (r==0)
<a name="l00451"></a>00451     {
<a name="l00452"></a>00452       <span class="keywordflow">if</span> (ptr!=NULL) *ptr=pos+i;
<a name="l00453"></a>00453       <span class="keywordflow">return</span> 1;
<a name="l00454"></a>00454     }
<a name="l00455"></a>00455       }
<a name="l00456"></a>00456       i++;
<a name="l00457"></a>00457     }
<a name="l00458"></a>00458   }
<a name="l00459"></a>00459   <span class="keywordflow">return</span> 0;
<a name="l00460"></a>00460 }
</pre></div></div>
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