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/*
SPDX-FileCopyrightText: 2012 Simon A. Eugster (Granjow) <simon.eu@gmail.com>
This file is part of kdenlive. See www.kdenlive.org.
SPDX-License-Identifier: GPL-3.0-or-later
*/
#include <QCoreApplication>
#include <QDateTime>
#include <QDebug>
#include <QFile>
#include <QFileInfo>
#include <QStringList>
#include <cmath>
#include <cstdlib>
#include <iostream>
#include <mlt++/Mlt.h>
#include "../src/lib/audio/audioCorrelation.h"
#include "../src/lib/audio/audioEnvelope.h"
#include "../src/lib/audio/audioInfo.h"
#include "../src/lib/audio/audioStreamInfo.h"
void printUsage(const char *path)
{
std::cout << "This executable takes two audio/video files A and B and determines " << std::endl
<< "how much B needs to be shifted in order to be synchronized with A." << std::endl
<< std::endl
<< path << " <main audio file> <second audio file>" << std::endl
<< "\t-h, --help\n\t\tDisplay this help" << std::endl
<< "\t--fft\n\t\tUse Fourier Transform (FFT) to calculate the offset. This only takes" << std::endl
<< "\t\tO(n log n) time compared to O(n²) when using normal correlation and should be " << std::endl
<< "\t\tfaster for large data (several minutes)." << std::endl
<< "\t--profile=<profile>\n\t\tUse the given profile for calculation (run: melt -query profiles)" << std::endl
<< "\t--no-images\n\t\tDo not save envelope and correlation images" << std::endl;
}
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
QStringList args = app.arguments();
args.removeAt(0);
std::string profile = "atsc_1080p_24";
bool saveImages = true;
bool useFFT = false;
// Load arguments
foreach (const QString &str, args) {
if (str.startsWith(QLatin1String("--profile="))) {
QString s = str;
s.remove(0, QStringLiteral("--profile=").length());
profile = s.toStdString();
args.removeOne(str);
} else if (str == "-h" || str == "--help") {
printUsage(argv[0]);
return 0;
} else if (str == "--no-images") {
saveImages = false;
args.removeOne(str);
} else if (str == "--fft") {
useFFT = true;
args.removeOne(str);
}
}
if (args.length() < 2) {
printUsage(argv[0]);
return 1;
}
std::string fileMain(args.at(0).toStdString());
args.removeFirst();
std::string fileSub = args.at(0).toStdString();
args.removeFirst();
qDebug() << "Unused arguments: " << args;
if (argc > 2) {
fileMain = argv[1];
fileSub = argv[2];
} else {
std::cout << "Usage: " << argv[0] << " <main audio file> <second audio file>" << std::endl;
return 0;
}
std::cout << "Trying to align (2)\n\t" << fileSub << "\nto fit on (1)\n\t" << fileMain << "\n, result will indicate by how much (2) has to be moved."
<< std::endl
<< "Profile used: " << profile << std::endl;
if (useFFT) {
std::cout << "Will use FFT based correlation." << std::endl;
}
// Initialize MLT
Mlt::Factory::init(NULL);
// Load an arbitrary profile
Mlt::Profile prof(profile.c_str());
// Load the MLT producers
Mlt::Producer prodMain(prof, fileMain.c_str());
if (!prodMain.is_valid()) {
std::cout << fileMain << " is invalid." << std::endl;
return 2;
}
Mlt::Producer prodSub(prof, fileSub.c_str());
if (!prodSub.is_valid()) {
std::cout << fileSub << " is invalid." << std::endl;
return 2;
}
// Build the audio envelopes for the correlation
AudioEnvelope *envelopeMain = new AudioEnvelope(fileMain.c_str(), &prodMain);
envelopeMain->loadEnvelope();
envelopeMain->loadStdDev();
envelopeMain->dumpInfo();
AudioEnvelope *envelopeSub = new AudioEnvelope(fileSub.c_str(), &prodSub);
envelopeSub->loadEnvelope();
envelopeSub->loadStdDev();
envelopeSub->dumpInfo();
// Calculate the correlation and hereby the audio shift
AudioCorrelation corr(envelopeMain);
int index = 0;
corr.addChild(envelopeSub /*, useFFT*/);
int shift = corr.getShift(index);
std::cout << " Should be shifted by " << shift << " frames: " << fileSub << std::endl
<< "\trelative to " << fileMain << std::endl
<< "\tin a " << prodMain.get_fps() << " fps profile (" << profile << ")." << std::endl;
if (saveImages) {
QString outImg = QString::fromLatin1("envelope-main-%1.png").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss"));
envelopeMain->drawEnvelope().save(outImg);
std::cout << "Saved volume envelope as " << QFileInfo(outImg).absoluteFilePath().toStdString() << std::endl;
outImg = QString::fromLatin1("envelope-sub-%1.png").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss"));
envelopeSub->drawEnvelope().save(outImg);
std::cout << "Saved volume envelope as " << QFileInfo(outImg).absoluteFilePath().toStdString() << std::endl;
outImg = QString::fromLatin1("correlation-%1.png").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd-hh:mm:ss"));
corr.info(index)->toImage().save(outImg);
std::cout << "Saved correlation image as " << QFileInfo(outImg).absoluteFilePath().toStdString() << std::endl;
}
// Mlt::Factory::close();
return 0;
}
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