//
// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
// Creation Date: Mon Feb  9 16:51:58 PST 2015
// Last Modified: Mon Feb  9 21:26:32 PST 2015 Updated for C++11.
// Filename:      tools/80off.cpp
// URL:           https://github.com/craigsapp/midifile/blob/master/tools/80off.cpp
// Syntax:        C++11
// vim:           ts=3
//
// Description:   Converts any note-off messages in the form "9? ?? 00" to
//                "8? ?? 40".  Release velocity can be set with the -v option.
//

#include "Options.h"
#include "MidiFile.h"

#include <iostream>

using namespace std;
using namespace smf;


// Global variables for command-line options.
Options  options;
int releaseVelocity = 64;


void     checkOptions        (Options& opts);
void     processFile         (const string& inputfilename, const string& outputfilename);
void     example             (void);
void     usage               (const string& command);


///////////////////////////////////////////////////////////////////////////

int main(int argc, char** argv) {
	options.setOptions(argc, argv);
	options.define("v|velocity|release-velocity=i:64", "release velocity");
	checkOptions(options);
	releaseVelocity = options.getInteger("release-velocity");
	processFile(options.getArg(1), options.getArg(2));
	return 0;
}

///////////////////////////////////////////////////////////////////////////



//////////////////////////////
//
// processFile -- Convert "9? ?? 00" MIDI messages into "8? ?? 00" messages.
//

void processFile(const string& inputfilename, const string& outputfilename) {
	MidiFile midifile(inputfilename);
	for (int i=0; i<midifile.getTrackCount(); i++) {
		for (int j=0; j<midifile.getEventCount(i); j++) {
			if (!midifile[i][j].isNoteOff()) {
				continue;
			}
			midifile[i][j].setCommandNibble(0x80);
			midifile[i][j].setVelocity(releaseVelocity);
		}
	}
	midifile.write(outputfilename);
}



//////////////////////////////
//
// checkOptions --
//

void checkOptions(Options& opts) {
	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 << "80off, version 1.0 (9 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);
	}

	if (options.getArgCount() > 2) {
		cerr << "Error: too many filenames, expecting only two" << endl;
		exit(1);
	}
	if (options.getArgCount() < 2) {
		cerr << "Error: too few filenames, expecting two:" << endl;
		cerr << "(1) input file to process, (2) name of output file." << 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;
}