qt-everywhere-src-5.14.1/qtmultimedia/examples/multimedia/audiodecoder/main.cpp

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#include "audiodecoder.h"

#include <QCoreApplication>
#include <QDir>
#include <QFileInfo>
#include <QTextStream>

#include <stdio.h>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);

    QTextStream cout(stdout, QIODevice::WriteOnly);
    if (app.arguments().size() < 2) {
        cout << "Usage: audiodecoder [-p] [-pd] SOURCEFILE [TARGETFILE]" << endl;
        cout << "Set -p option if you want to play output file." << endl;
        cout << "Set -pd option if you want to play output file and delete it after successful playback." << endl;
        cout << "Default TARGETFILE name is \"out.wav\" in the same directory as the source file." << endl;
        return 0;
    }

    bool isPlayback = false;
    bool isDelete = false;

    if (app.arguments().at(1) == "-p")
        isPlayback = true;
    else if (app.arguments().at(1) == "-pd") {
        isPlayback = true;
        isDelete = true;
    }

    QFileInfo sourceFile;
    QFileInfo targetFile;

    int sourceFileIndex = (isPlayback || isDelete) ? 2 : 1;
    if (app.arguments().size() <= sourceFileIndex) {
        cout << "Error: source filename is not specified." << endl;
        return 0;
    }
    sourceFile.setFile(app.arguments().at(sourceFileIndex));
    if (app.arguments().size() > sourceFileIndex + 1)
        targetFile.setFile(app.arguments().at(sourceFileIndex + 1));
    else
        targetFile.setFile(sourceFile.dir().absoluteFilePath("out.wav"));

    AudioDecoder decoder(isPlayback, isDelete);
    QObject::connect(&decoder, &AudioDecoder::done,
                     &app, &QCoreApplication::quit);
    decoder.setSourceFilename(sourceFile.absoluteFilePath());
    decoder.setTargetFilename(targetFile.absoluteFilePath());
    decoder.start();

    return app.exec();
}