195 lines
4.5 KiB
C++
195 lines
4.5 KiB
C++
//
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// Programmer: Craig Stuart Sapp <craig@ccrma.stanford.edu>
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// Creation Date: Tue Jan 22 22:09:46 PST 2002
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// Last Modified: Mon Feb 9 21:26:32 PST 2015 Updated for C++11.
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// Filename: tools/midi2text.cpp
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// URL: https://github.com/craigsapp/midifile/blob/master/tools/midi2text.cpp
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// Syntax: C++11
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// vim: ts=3
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//
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// Description: Converts a MIDI file into a text based notelist.
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//
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#include "MidiFile.h"
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#include "Options.h"
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#include <cctype>
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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include <vector>
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using namespace std;
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using namespace smf;
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void convertMidiFileToText (MidiFile& midifile);
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void setTempo (MidiFile& midifile, int index, double& tempo);
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void checkOptions (Options& opts, int argc, char** argv);
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void example (void);
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void usage (const char* command);
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// User interface variables:
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Options options;
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int debugQ = 0; // use with --debug option
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int maxcount = 100000;
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double tempo = 60.0;
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//////////////////////////////////////////////////////////////////////////
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int main(int argc, char* argv[]) {
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checkOptions(options, argc, argv);
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MidiFile midifile(options.getArg(1));
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convertMidiFileToText(midifile);
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return 0;
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}
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////
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//
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// convertMidiFileToText --
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//
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void convertMidiFileToText(MidiFile& midifile) {
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midifile.absoluteTicks();
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midifile.joinTracks();
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vector<double> ontimes(128);
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vector<int> onvelocities(128);
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int i;
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for (i=0; i<128; i++) {
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ontimes[i] = -1.0;
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onvelocities[i] = -1;
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}
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double offtime = 0.0;
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int key = 0;
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int vel = 0;
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for (i=0; i<midifile.getNumEvents(0); i++) {
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int command = midifile[0][i][0] & 0xf0;
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if (command == 0x90 && midifile[0][i][2] != 0) {
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// store note-on velocity and time
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key = midifile[0][i][1];
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vel = midifile[0][i][2];
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ontimes[key] = midifile[0][i].tick * 60.0 / tempo / midifile.getTicksPerQuarterNote();
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onvelocities[key] = vel;
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} else if (command == 0x90 || command == 0x80) {
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// note off command write to output
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key = midifile[0][i][1];
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offtime = midifile[0][i].tick * 60.0 / midifile.getTicksPerQuarterNote() / tempo;
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cout << "note\t" << ontimes[key]
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<< "\t" << offtime - ontimes[key]
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<< "\t" << key << "\t" << onvelocities[key] << endl;
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onvelocities[key] = -1;
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ontimes[key] = -1.0;
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}
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// check for tempo indication
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if (midifile[0][i][0] == 0xff && midifile[0][i][1] == 0x51) {
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setTempo(midifile, i, tempo);
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}
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}
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}
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//////////////////////////////
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//
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// setTempo -- set the current tempo
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//
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void setTempo(MidiFile& midifile, int index, double& tempo) {
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static int count = 0;
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count++;
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MidiEvent& mididata = midifile[0][index];
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int microseconds = 0;
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microseconds = microseconds | (mididata[3] << 16);
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microseconds = microseconds | (mididata[4] << 8);
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microseconds = microseconds | (mididata[5] << 0);
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double newtempo = 60.0 / microseconds * 1000000.0;
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if (count <= 1) {
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tempo = newtempo;
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} else if (tempo != newtempo) {
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cout << "; WARNING: change of tempo from " << tempo
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<< " to " << newtempo << " ignored" << endl;
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}
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}
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//////////////////////////////
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//
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// checkOptions --
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//
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void checkOptions(Options& opts, int argc, char* argv[]) {
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opts.define("author=b", "author of program");
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opts.define("version=b", "compilation info");
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opts.define("example=b", "example usages");
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opts.define("h|help=b", "short description");
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opts.define("debug=b", "debug mode to find errors in input file");
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opts.define("max=i:100000", "maximum number of notes expected in input");
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opts.process(argc, argv);
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// handle basic options:
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if (opts.getBoolean("author")) {
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cout << "Written by Craig Stuart Sapp, "
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<< "craig@ccrma.stanford.edu, 22 Jan 2002" << endl;
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exit(0);
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} else if (opts.getBoolean("version")) {
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cout << argv[0] << ", version: 22 Jan 2002" << endl;
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cout << "compiled: " << __DATE__ << endl;
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exit(0);
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} else if (opts.getBoolean("help")) {
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usage(opts.getCommand().c_str());
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exit(0);
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} else if (opts.getBoolean("example")) {
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example();
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exit(0);
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}
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debugQ = opts.getBoolean("debug");
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maxcount = opts.getInteger("max");
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if (opts.getArgCount() != 1) {
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usage(opts.getCommand().c_str());
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exit(1);
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}
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}
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//////////////////////////////
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//
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// example --
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//
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void example(void) {
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// add examples here
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}
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//////////////////////////////
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//
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// usage --
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//
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void usage(const char* command) {
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cout << "Usage: " << command << " midifile" << endl;
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}
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