初始化内容

third/midifile/tools/durations.cpp

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+//
+// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
+// Creation Date: Thu Feb 19 20:43:49 PST 2015
+// Last Modified: Thu Feb 19 20:43:52 PST 2015
+// Filename:      tools/durations.cpp
+// URL:           https://github.com/craigsapp/midifile/blob/master/tools/durations.cpp
+// Syntax:        C++11
+// vim:           ts=3
+//
+// Description:   Print note durations in a MidiFile.  Note-ons with no
+//                no matching note-offs (such as for rhythm-channel
+//                events) will have a duration of 0.
+//
+
+#include "Options.h"
+#include "MidiFile.h"
+
+#include <iostream>
+
+using namespace std;
+using namespace smf;
+
+
+// Global variables for command-line options.
+Options  options;
+int      quarterQ = 0;  // used with -q option: time units in quarter notes.
+int      joinQ    = 0;  // used with -j option: join tracks before printing.
+int      secondsQ = 0;  // used with -s option: print times in seconds.
+
+
+void     checkOptions        (Options& opts);
+void     example             (void);
+void     usage               (const string& command);
+
+
+///////////////////////////////////////////////////////////////////////////
+
+int main(int argc, char** argv) {
+	options.setOptions(argc, argv);
+	checkOptions(options);
+
+	int status;
+	MidiFile midifile;
+	if (options.getArgCount()) {
+		status = midifile.read(options.getArg(1));
+	} else {
+		status = midifile.read(cin);
+	}
+	if (status == 0) {
+		cerr << "Error: could not read MIDI file" << endl;
+		exit(1);
+	}
+
+	int tpq = midifile.getTicksPerQuarterNote();
+	midifile.linkNotePairs();
+	if (joinQ) {
+		midifile.joinTracks();
+	}
+	MidiEvent* mev;
+	double duration;
+
+	if (secondsQ) {
+		midifile.doTimeAnalysis();
+	}
+
+	if (secondsQ) {
+		cout << "SEC\tDUR\tTRACK\tNOTE\n";
+	} else if (quarterQ) {
+		cout << "QTRS\tDUR\tTRACK\tNOTE\n";
+	} else {
+		cout << "TICKS\tDUR\tTRACK\tNOTE\n";
+	}
+	cout << "============================\n";
+
+	for (int track=0; track < midifile.getTrackCount(); track++) {
+		for (int i=0; i<midifile[track].size(); i++) {
+			mev = &midifile[track][i];
+			if (!mev->isNoteOn()) {
+				continue;
+			}
+			if (secondsQ) {
+				duration = mev->getDurationInSeconds();
+			} else {
+				duration = mev->getTickDuration();
+			}
+
+			if (secondsQ) {
+				cout << mev->seconds << '\t';
+				cout << duration << '\t';
+			} else if (quarterQ) {
+				cout << mev->tick/tpq << '\t';
+				cout << duration/tpq << '\t';
+			} else {
+				cout << mev->tick << '\t';
+				cout << duration << '\t';
+			}
+			cout << mev->track << '\t';
+			cout << mev->getKeyNumber();
+			cout << endl;
+		}
+		if (midifile.getTrackCount() > 1) {
+			cout << endl;
+		}
+	}
+
+	return 0;
+}
+
+///////////////////////////////////////////////////////////////////////////
+
+
+//////////////////////////////
+//
+// checkOptions --
+//
+
+void checkOptions(Options& opts) {
+	opts.define("q|quarter=b", "Display ticks in quarter note units");
+	opts.define("j|join=b",    "Join tracks before printing");
+	opts.define("s|seconds=b", "Display times in seconds");
+
+	opts.define("author=b",   "Author of the program");
+	opts.define("version=b",  "Version of the program");
+	opts.define("example=b",  "Example useage of the program");
+	opts.define("h|help=b",   "List of options for the program");
+	opts.process();
+
+	if (opts.getBoolean("author")) {
+		cout << "Written by Craig Stuart Sapp, "
+		     << "craig@ccrma.stanford.edu, February 2015" << endl;
+		exit(0);
+	} else if (opts.getBoolean("version")) {
+		cout << "duration, version 1.0 (19 Feb 2015)\n"
+		     << "compiled: " << __DATE__ << endl;
+		exit(0);
+	} else if (opts.getBoolean("help")) {
+		usage(opts.getCommand());
+		exit(0);
+	} else if (opts.getBoolean("example")) {
+		example();
+		exit(0);
+	}
+
+	quarterQ  = opts.getBoolean("quarter");
+	joinQ     = opts.getBoolean("join");
+	secondsQ  = opts.getBoolean("seconds");
+	if (secondsQ) {
+		quarterQ = 0;
+	}
+
+	if (opts.getArgCount() > 1) {
+		cerr << "Error: One input file or standard input is required." << endl;
+		exit(1);
+	}
+}
+
+
+
+//////////////////////////////
+//
+// example -- shows various command-line option calls to program.
+//
+
+void example(void) {
+	cout <<
+	"\n"
+	<< endl;
+}
+
+
+
+//////////////////////////////
+//
+// usage -- how to run this program from the command-line.
+//
+
+void usage(const string& command) {
+	cout <<
+	"\n"
+	<< endl;
+}
+
+
+