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<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
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<h1>playsmf.cpp</h1><div class="fragment"><pre>00001 <span class="comment">// playsmf.cpp</span>
00002 <span class="comment">//</span>
00003 <span class="comment">// Simple program to test the MidiFileIn class by reading and playing</span>
00004 <span class="comment">// a single track from a given Standard MIDI file.</span>
00005 <span class="comment">//</span>
00006 <span class="comment">// by Gary Scavone, 2003.</span>
00007 <span class="comment">//</span>
00008 <span class="comment">// compile: g++ -Wall -o playsmf playsmf.cpp RtMidi.o MidiFileIn.cpp Stk.cpp -framework CoreMIDI -framework CoreFoundation -framework CoreAudio</span>
00009
00010 <span class="preprocessor">#include "MidiFileIn.h"</span>
00011 <span class="preprocessor">#include "RtMidi.h"</span>
00012 <span class="preprocessor">#include <signal.h></span>
00013 <span class="preprocessor">#include <unistd.h></span>
00014
00015 <span class="keywordtype">bool</span> done = <span class="keyword">false</span>;
00016 <span class="keyword">static</span> <span class="keywordtype">void</span> finish(<span class="keywordtype">int</span> ignore){ done = <span class="keyword">true</span>; }
00017
00018 <span class="keywordtype">void</span> usage(<span class="keywordtype">void</span>) {
00019 <span class="comment">// Error function in case of incorrect command-line</span>
00020 <span class="comment">// argument specifications.</span>
00021 std::cout << <span class="stringliteral">"\nusage: testmidi file track\n"</span>;
00022 std::cout << <span class="stringliteral">" where file = a standard MIDI file,\n"</span>;
00023 std::cout << <span class="stringliteral">" and track = the track to play (0 = 1st track).\n\n"</span>;
00024 exit(0);
00025 }
00026
00027 <span class="keywordtype">int</span> main( <span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[] )
00028 {
00029 <span class="keywordflow">if</span> ( argc != 3 ) usage();
00030
00031 <a class="code" href="classRtMidiOut.html">RtMidiOut</a> midi;
00032
00033 <span class="keywordflow">if</span> ( midi.<a class="code" href="classRtMidiOut.html#a5">getPortCount</a>() < 1 ) {
00034 std::cout << <span class="stringliteral">"\nThere are no MIDI output destinations available!\n\n"</span>;
00035 exit(0);
00036 }
00037
00038 <span class="keywordflow">try</span> {
00039 midi.<a class="code" href="classRtMidiOut.html#a3">openPort</a>();
00040 }
00041 <span class="keywordflow">catch</span> ( <a class="code" href="classRtError.html">RtError</a> & ) {
00042 <span class="comment">// You might want to do something more useful here.</span>
00043 std::cout << <span class="stringliteral">"\nAborting program!\n"</span>;
00044 exit(0);
00045 }
00046
00047 <span class="comment">// Install an interrupt handler function. Type "ctrl-c" to quit the</span>
00048 <span class="comment">// program.</span>
00049 (void) signal(SIGINT, finish);
00050
00051 <span class="keywordflow">try</span> {
00052 <a class="code" href="classMidiFileIn.html">MidiFileIn</a> midiFile( argv[1] );
00053
00054 <span class="comment">// Print a little information about the file.</span>
00055 std::cout << <span class="stringliteral">"\nThe MIDI file ("</span> << argv[1] << <span class="stringliteral">") information:\n"</span>;
00056 std::cout << <span class="stringliteral">" - format = "</span> << midiFile.<a class="code" href="classMidiFileIn.html#a2">getFileFormat</a>() << <span class="stringliteral">"\n"</span>;
00057 std::cout << <span class="stringliteral">" - tracks = "</span> << midiFile.<a class="code" href="classMidiFileIn.html#a3">getNumberOfTracks</a>() << <span class="stringliteral">"\n"</span>;
00058 std::cout << <span class="stringliteral">" - seconds / ticks = "</span> << midiFile.<a class="code" href="classMidiFileIn.html#a6">getTickSeconds</a>() << <span class="stringliteral">"\n"</span>;
00059
00060 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> track = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>) atoi( argv[2] );
00061 <span class="keywordflow">if</span> ( midiFile.<a class="code" href="classMidiFileIn.html#a3">getNumberOfTracks</a>() <= track ) {
00062 std::cout << <span class="stringliteral">"\nInvalid track number ... playing track 0.\n"</span>;
00063 track = 0;
00064 }
00065
00066 std::cout << <span class="stringliteral">"\nPress <enter> to start reading/playing.\n"</span>;
00067 <span class="keywordtype">char</span> input;
00068 std::cin.get(input);
00069
00070 std::vector<unsigned char> event;
00071 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> ticks = midiFile.<a class="code" href="classMidiFileIn.html#a8">getNextMidiEvent</a>( &event, track );
00072 <span class="keywordflow">while</span> ( !done && event.size() ) {
00073
00074 <span class="comment">// Pause for the MIDI event delta time.</span>
00075 <a class="code" href="classStk.html#d7">Stk::sleep</a>( (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>) (ticks * midiFile.<a class="code" href="classMidiFileIn.html#a6">getTickSeconds</a>() * 1000 ) );
00076
00077 midi.<a class="code" href="classRtMidiOut.html#a7">sendMessage</a>( &event );
00078
00079 <span class="comment">// Get a new event.</span>
00080 ticks = midiFile.<a class="code" href="classMidiFileIn.html#a8">getNextMidiEvent</a>( &event, track );
00081 }
00082
00083 <span class="comment">// Send a "reset" to the synthesizer.</span>
00084 event.clear();
00085 event.push_back( 0xff );
00086 midi.<a class="code" href="classRtMidiOut.html#a7">sendMessage</a>( &event );
00087 }
00088 <span class="keywordflow">catch</span> ( <a class="code" href="classStkError.html">StkError</a> & ) {
00089 <span class="comment">// You might want to do something more useful here.</span>
00090 std::cout << <span class="stringliteral">"\nAborting program!\n"</span>;
00091 midi.<a class="code" href="classRtMidiOut.html#a4">closePort</a>();
00092 exit(0);
00093 }
00094
00095 std::cout << <span class="stringliteral">"Goodbye!\n"</span>;
00096 <span class="keywordflow">return</span> 0;
00097 }
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<tr><td><A HREF="http://www-ccrma.stanford.edu/software/stk/"><I>The Synthesis ToolKit in C++ (STK)</I></A></td></tr>
<tr><td>©1995-2002 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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