tagparser/tests/overallmp4.cpp

#include "./helper.h"
#include "./overall.h"

#include "../abstracttrack.h"
#include "../mp4/mp4ids.h"
#include "../mp4/mp4tag.h"
#include "../mp4/mp4container.h"

namespace Mp4TestFlags {
enum TestFlag
{
    ForceRewring = 0x1,
    KeepTagPos = 0x2,
    TagsBeforeData = 0x10,
    RemoveTagOrTrack = KeepTagPos & TagsBeforeData,
    PaddingConstraints = 0x4,
    ForceTagPos = 0x8,
};
}

/*!
 * \brief Checks "mtx-test-data/mp4/10-DanseMacabreOp.40.m4a"
 */
void OverallTests::checkMp4Testfile1()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    const auto tracks = m_fileInfo.tracks();
    CPPUNIT_ASSERT(tracks.size() == 1);
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Aac, track->format().general);
            CPPUNIT_ASSERT_EQUAL(2012, track->creationTime().year());
            CPPUNIT_ASSERT_EQUAL(44100u, track->samplingFrequency());
            CPPUNIT_ASSERT_EQUAL(static_cast<byte>(Mpeg4ChannelConfigs::FrontLeftFrontRight), track->channelConfig());
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    const auto tags = m_fileInfo.tags();
    switch(m_tagStatus) {
    case TagStatus::Original:
        CPPUNIT_ASSERT(tags.size() == 1);
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Title).toString() == "Danse Macabre, Op.40");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Artist).toString() == "Saint-Saëns");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Genre).toString() == "Classical");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Encoder).toString() == "qaac 1.32, CoreAudioToolbox 7.9.7.3, AAC-LC Encoder, TVBR q63, Quality 96");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::TrackPosition).toPositionInSet().position() == 10);
        break;
    case TagStatus::TestMetaDataPresent:
        checkMp4TestMetaData();
        break;
    case TagStatus::Removed:
        CPPUNIT_ASSERT_EQUAL(0_st, tracks.size());
    }
}

/*!
 * \brief Checks "mtx-test-data/mp4/1080p-DTS-HD-7.1.mp4"
 */
void OverallTests::checkMp4Testfile2()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    const auto tracks = m_fileInfo.tracks();
    CPPUNIT_ASSERT_EQUAL(5_st, tracks.size());
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT_EQUAL(MediaType::Video, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Avc, track->format().general);
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(SubFormats::AvcHighProfile), track->format().sub);
            CPPUNIT_ASSERT_EQUAL(4.0, track->version());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            CPPUNIT_ASSERT(track->pixelSize() == Size(1920, 750));
            break;
        case 2:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Aac, track->format().general);
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(SubFormats::AacMpeg4LowComplexityProfile), track->format().sub);
            CPPUNIT_ASSERT(!(track->format().extension & ExtensionFormats::SpectralBandReplication));
            CPPUNIT_ASSERT(!(track->format().extension & ExtensionFormats::ParametricStereo));
            CPPUNIT_ASSERT_EQUAL("eng"s, track->language());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            CPPUNIT_ASSERT_EQUAL(48000u, track->samplingFrequency());
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(Mpeg4ChannelConfigs::FrontLeftFrontRight), track->channelConfig());
            break;
        case 3:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Ac3, track->format().general);
            CPPUNIT_ASSERT_EQUAL("eng"s, track->language());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        case 4:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::DtsHd, track->format().general);
            CPPUNIT_ASSERT_EQUAL("eng"s, track->language());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        case 6:
            CPPUNIT_ASSERT_EQUAL(MediaType::Text, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::TimedText, track->format().general);
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    const auto tags = m_fileInfo.tags();
    switch(m_tagStatus) {
    case TagStatus::Original:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
        break;
    case TagStatus::TestMetaDataPresent:
        checkMp4TestMetaData();
        break;
    case TagStatus::Removed:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
    }
}

/*!
 * \brief Checks "mtx-test-data/mp4/dash/dragon-age-inquisition-H1LkM6IVlm4-video.mp4"
 */
void OverallTests::checkMp4Testfile3()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    CPPUNIT_ASSERT(m_fileInfo.container() && m_fileInfo.container()->documentType() == "dash");
    const auto tracks = m_fileInfo.tracks();
    CPPUNIT_ASSERT(tracks.size() == 1);
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT(track->mediaType() == MediaType::Video);
            CPPUNIT_ASSERT(track->format() == GeneralMediaFormat::Avc);
            CPPUNIT_ASSERT(track->format().sub == SubFormats::AvcMainProfile);
            CPPUNIT_ASSERT(track->version() == 3.1);
            CPPUNIT_ASSERT(track->creationTime().year() == 2014);
            CPPUNIT_ASSERT(track->pixelSize() == Size(854, 480));
            CPPUNIT_ASSERT(!strcmp(track->chromaFormat(), "YUV 4:2:0"));
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    const auto tags = m_fileInfo.tags();
    switch(m_tagStatus) {
    case TagStatus::Original:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
        break;
    case TagStatus::TestMetaDataPresent:
        checkMp4TestMetaData();
        break;
    case TagStatus::Removed:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
    }
}

/*!
 * \brief Checks "mtx-test-data/mp4/alac/othertest-itunes.m4a"
 */
void OverallTests::checkMp4Testfile4()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    CPPUNIT_ASSERT(m_fileInfo.container() && m_fileInfo.container()->documentType() == "M4A ");
    const auto tracks = m_fileInfo.tracks();
    CPPUNIT_ASSERT(tracks.size() == 1);
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Alac, track->format().general);
            CPPUNIT_ASSERT(track->creationTime().year() == 2008);
            CPPUNIT_ASSERT(track->channelCount() == 2);
            CPPUNIT_ASSERT(track->bitsPerSample() == 16);
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    const auto tags = m_fileInfo.tags();
    switch(m_tagStatus) {
    case TagStatus::Original:
        CPPUNIT_ASSERT(tags.size() == 1);
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Title).toString() == "Sad Song");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Artist).toString() == "Oasis");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Album).toString() == "Don't Go Away (Apple Lossless)");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Genre).toString() == "Alternative & Punk");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Encoder).toString() == "iTunes v7.5.0.20");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Year).toString() == "1998");
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Comment).isEmpty());
        CPPUNIT_ASSERT(tags.front()->value(KnownField::Cover).dataSize() == 0x58f3);
        CPPUNIT_ASSERT(BE::toUInt64(tags.front()->value(KnownField::Cover).dataPointer()) == 0xFFD8FFE000104A46);
        CPPUNIT_ASSERT(tags.front()->value(KnownField::TrackPosition).toPositionInSet() == PositionInSet(3, 4));
        CPPUNIT_ASSERT(tags.front()->value(KnownField::DiskPosition).toPositionInSet() == PositionInSet(1, 1));
        break;
    case TagStatus::TestMetaDataPresent:
        checkMp4TestMetaData();
        break;
    case TagStatus::Removed:
        CPPUNIT_ASSERT_EQUAL(0_st, tracks.size());
    }
}

/*!
 * \brief Checks "mtx-test-data/aac/he-aacv2-ps.m4a"
 */
void OverallTests::checkMp4Testfile5()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    CPPUNIT_ASSERT(m_fileInfo.container() && m_fileInfo.container()->documentType() == "mp42");
    const auto tracks = m_fileInfo.tracks();
    CPPUNIT_ASSERT(tracks.size() == 1);
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Aac, track->format().general);
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(SubFormats::AacMpeg4LowComplexityProfile), track->format().sub);
            CPPUNIT_ASSERT(track->format().extension & ExtensionFormats::SpectralBandReplication);
            CPPUNIT_ASSERT(track->format().extension & ExtensionFormats::ParametricStereo);
            CPPUNIT_ASSERT(track->creationTime().year() == 2014);
            CPPUNIT_ASSERT(track->channelCount() == 2);
            CPPUNIT_ASSERT(track->channelConfig() == Mpeg4ChannelConfigs::FrontCenter);
            CPPUNIT_ASSERT(track->extensionChannelConfig() == Mpeg4ChannelConfigs::FrontLeftFrontRight);
            CPPUNIT_ASSERT(track->samplingFrequency() == 24000);
            CPPUNIT_ASSERT(track->extensionSamplingFrequency() == 48000);
            CPPUNIT_ASSERT(track->bitsPerSample() == 16);
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    const auto tags = m_fileInfo.tags();
    switch(m_tagStatus) {
    case TagStatus::Original:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
        break;
    case TagStatus::TestMetaDataPresent:
        checkMp4TestMetaData();
        break;
    case TagStatus::Removed:
        CPPUNIT_ASSERT_EQUAL(0_st, tags.size());
    }
}

/*!
 * \brief Checks "mtx-test-data/mp4/1080p-DTS-HD-7.1.mp4" after adding/removing track.
 */
void OverallTests::checkMp4Testfile6()
{
    CPPUNIT_ASSERT(m_fileInfo.containerFormat() == ContainerFormat::Mp4);
    const auto tracks = m_fileInfo.tracks();
    if(m_mode & Mp4TestFlags::RemoveTagOrTrack) {
        CPPUNIT_ASSERT_EQUAL(4_st, tracks.size());
    } else {
        CPPUNIT_ASSERT_EQUAL(6_st, tracks.size());
    }
    bool track2Present = false, track5Present = false;
    for(const auto &track : tracks) {
        switch(track->id()) {
        case 1:
            CPPUNIT_ASSERT_EQUAL(MediaType::Video, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Avc, track->format().general);
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(SubFormats::AvcHighProfile), track->format().sub);
            CPPUNIT_ASSERT_EQUAL(4.0, track->version());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            CPPUNIT_ASSERT(track->pixelSize() == Size(1920, 750));
            break;
        case 2:
            CPPUNIT_ASSERT(track2Present = !track2Present);
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Aac, track->format().general);
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(SubFormats::AacMpeg4LowComplexityProfile), track->format().sub);
            CPPUNIT_ASSERT(!(track->format().extension & ExtensionFormats::SpectralBandReplication));
            CPPUNIT_ASSERT(!(track->format().extension & ExtensionFormats::ParametricStereo));
            CPPUNIT_ASSERT_EQUAL("ger"s, track->language());
            CPPUNIT_ASSERT_EQUAL("test"s, track->name());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            CPPUNIT_ASSERT_EQUAL(48000u, track->samplingFrequency());
            CPPUNIT_ASSERT_EQUAL(static_cast<unsigned char>(Mpeg4ChannelConfigs::FrontLeftFrontRight), track->channelConfig());
            break;
        case 3:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Ac3, track->format().general);
            CPPUNIT_ASSERT_EQUAL("eng"s, track->language());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        case 4:
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::DtsHd, track->format().general);
            CPPUNIT_ASSERT_EQUAL("eng"s, track->language());
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        case 5:
            CPPUNIT_ASSERT(track5Present = !track5Present);
            CPPUNIT_ASSERT_EQUAL(MediaType::Audio, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::Aac, track->format().general);
            CPPUNIT_ASSERT_EQUAL(2012, track->creationTime().year());
            CPPUNIT_ASSERT_EQUAL(44100u, track->samplingFrequency());
            CPPUNIT_ASSERT_EQUAL(static_cast<byte>(Mpeg4ChannelConfigs::FrontLeftFrontRight), track->channelConfig());
            CPPUNIT_ASSERT_EQUAL("new track"s, track->name());
            break;
        case 6:
            CPPUNIT_ASSERT_EQUAL(MediaType::Text, track->mediaType());
            CPPUNIT_ASSERT_EQUAL(GeneralMediaFormat::TimedText, track->format().general);
            CPPUNIT_ASSERT_EQUAL(2013, track->creationTime().year());
            break;
        default:
            CPPUNIT_FAIL("unknown track ID");
        }
    }
    if(m_mode & Mp4TestFlags::RemoveTagOrTrack) {
        CPPUNIT_ASSERT(!track2Present);
        CPPUNIT_ASSERT(!track5Present);
    } else {
        CPPUNIT_ASSERT(track2Present);
        CPPUNIT_ASSERT(track5Present);
    }

    CPPUNIT_ASSERT_EQUAL(0_st, m_fileInfo.tags().size());
}

/*!
 * \brief Checks whether test meta data for MP4 files has been applied correctly.
 */
void OverallTests::checkMp4TestMetaData()
{
    // check whether a tag is assigned
    const auto tags = m_fileInfo.tags();
    Mp4Tag *tag = m_fileInfo.mp4Tag();
    CPPUNIT_ASSERT(tags.size() == 1);
    CPPUNIT_ASSERT(tag != nullptr);

    // check test meta data
    CPPUNIT_ASSERT_EQUAL(m_testTitle, tag->value(KnownField::Title));
    CPPUNIT_ASSERT_EQUAL(m_testComment.toString(), tag->value(KnownField::Comment).toString()); // loss of description is ok
    CPPUNIT_ASSERT_EQUAL(m_testAlbum, tag->value(KnownField::Album));
    CPPUNIT_ASSERT_EQUAL(m_preservedMetaData.front(), tag->value(KnownField::Artist));
    CPPUNIT_ASSERT_EQUAL(m_testPosition, tag->value(KnownField::TrackPosition));
    CPPUNIT_ASSERT_EQUAL(m_testPosition, tag->value(KnownField::DiskPosition));

    // TODO: check more fields
    m_preservedMetaData.pop();
}

/*!
 * \brief Checks whether padding and element position constraints are met.
 */
void OverallTests::checkMp4Constraints()
{
    using namespace Mp4TestFlags;

    CPPUNIT_ASSERT(m_fileInfo.container());
    if(m_mode & PaddingConstraints) {
        if(m_mode & ForceRewring) {
            CPPUNIT_ASSERT_EQUAL(4096_st, m_fileInfo.paddingSize());
        } else {
            CPPUNIT_ASSERT(m_fileInfo.paddingSize() >= 1024);
            CPPUNIT_ASSERT(m_fileInfo.paddingSize() <= (4096 + 1024));
        }
        if(!(m_mode & RemoveTagOrTrack) && (m_fileInfo.container()->documentType() != "dash") && ((m_mode & ForceRewring) || (m_mode & ForceTagPos))) {
            const ElementPosition currentTagPos = m_fileInfo.container()->determineTagPosition();
            if(currentTagPos == ElementPosition::Keep) {
                CPPUNIT_ASSERT_EQUAL(m_expectedTagPos,  m_fileInfo.container()->determineIndexPosition());
            }
        }
    }
}

/*!
 * \brief Sets test meta data in the file to be tested.
 */
void OverallTests::setMp4TestMetaData()
{
    // ensure a tag exists
    Tag *tag = m_fileInfo.container()->createTag();

    // assign test meta data
    tag->setValue(KnownField::Title, m_testTitle);
    tag->setValue(KnownField::Comment, m_testComment);
    tag->setValue(KnownField::Album, m_testAlbum);
    m_preservedMetaData.push(tag->value(KnownField::Artist));
    tag->setValue(KnownField::TrackPosition, m_testPosition);
    tag->setValue(KnownField::DiskPosition, m_testPosition);
    // TODO: set more fields
}

/*!
 * \brief Alters the tracks of the file to be testd.
 *
 * - Adds track from mtx-test-data/mp4/10-DanseMacabreOp.40.m4a
 * - Sets the language of the 2nd track to German
 * - Sets the name of the 2nd track to "test".
 */
void OverallTests::alterMp4Tracks()
{
    m_additionalFileInfo.setPath(TestUtilities::testFilePath("mtx-test-data/mp4/10-DanseMacabreOp.40.m4a"));
    m_additionalFileInfo.reopen(true);
    m_additionalFileInfo.parseContainerFormat();
    m_additionalFileInfo.parseTracks();
    CPPUNIT_ASSERT_EQUAL(ContainerFormat::Mp4, m_additionalFileInfo.containerFormat());
    CPPUNIT_ASSERT_EQUAL(ContainerFormat::Mp4, m_fileInfo.containerFormat());
    const auto &tracks = m_additionalFileInfo.tracks();
    CPPUNIT_ASSERT_EQUAL(1_st, tracks.size());
    CPPUNIT_ASSERT_EQUAL(TrackType::Mp4Track, tracks[0]->type());
    auto *track = static_cast<Mp4Track *>(tracks[0]);
    CPPUNIT_ASSERT(static_cast<Mp4Container *>(m_additionalFileInfo.container())->removeTrack(track));
    CPPUNIT_ASSERT_EQUAL(0_st, m_additionalFileInfo.trackCount());
    track->setName("new track");
    auto *container = static_cast<Mp4Container *>(m_fileInfo.container());
    CPPUNIT_ASSERT_EQUAL(5_st, container->trackCount());
    container->addTrack(track);
    CPPUNIT_ASSERT_EQUAL(6_st, container->trackCount());
    auto &secondTrack = container->tracks()[1];
    secondTrack->setLanguage("ger");
    secondTrack->setName("test");
}

/*!
 * \brief Tests the MP4 parser via MediaFileInfo.
 */
void OverallTests::testMp4Parsing()
{
    cerr << endl << "MP4 parser" << endl;
    m_fileInfo.setForceFullParse(false);
    m_tagStatus = TagStatus::Original;
    parseFile(TestUtilities::testFilePath("mtx-test-data/mp4/10-DanseMacabreOp.40.m4a"), &OverallTests::checkMp4Testfile1);
    parseFile(TestUtilities::testFilePath("mtx-test-data/mp4/1080p-DTS-HD-7.1.mp4"), &OverallTests::checkMp4Testfile2);
    parseFile(TestUtilities::testFilePath("mtx-test-data/mp4/dash/dragon-age-inquisition-H1LkM6IVlm4-video.mp4"), &OverallTests::checkMp4Testfile3);
    parseFile(TestUtilities::testFilePath("mtx-test-data/alac/othertest-itunes.m4a"), &OverallTests::checkMp4Testfile4);
    parseFile(TestUtilities::testFilePath("mtx-test-data/aac/he-aacv2-ps.m4a"), &OverallTests::checkMp4Testfile5);
}

#ifdef PLATFORM_UNIX
/*!
 * \brief Tests the MP4 maker via MediaFileInfo.
 * \remarks Relies on the parser to check results.
 */
void OverallTests::testMp4Making()
{
    // full parse is required to determine padding
    m_fileInfo.setForceFullParse(true);

    // do the test under different conditions
    for(m_mode = 0; m_mode != 0x20; ++m_mode) {
        using namespace Mp4TestFlags;

        // setup test conditions

        m_fileInfo.setForceRewrite(m_mode & ForceRewring);
        if(m_mode & KeepTagPos) {
            m_fileInfo.setTagPosition(ElementPosition::Keep);
        } else {
            m_fileInfo.setTagPosition(m_mode & TagsBeforeData ? ElementPosition::BeforeData : ElementPosition::AfterData);
        }
        m_fileInfo.setIndexPosition(m_fileInfo.tagPosition());
        m_fileInfo.setPreferredPadding(m_mode & PaddingConstraints ? 4096 : 0);
        m_fileInfo.setMinPadding(m_mode & PaddingConstraints ? 1024 : 0);
        m_fileInfo.setMaxPadding(m_mode & PaddingConstraints ? (4096 + 1024) : static_cast<size_t>(-1));
        m_fileInfo.setForceTagPosition(m_mode & ForceTagPos);
        m_fileInfo.setForceIndexPosition(m_mode & ForceTagPos);

        // print test conditions
        list<string> testConditions;
        if(m_mode & ForceRewring) {
            testConditions.emplace_back("forcing rewrite");
        }
        if(m_mode & KeepTagPos) {
            if(m_mode & RemoveTagOrTrack) {
                testConditions.emplace_back("removing tag");
            } else {
                testConditions.emplace_back("keeping tag position");
            }
        } else if(m_mode & TagsBeforeData) {
            testConditions.emplace_back("tags before data");
        } else {
            testConditions.emplace_back("tags after data");
        }
        if(m_mode & PaddingConstraints) {
            testConditions.emplace_back("padding constraints");
        }
        if(m_mode & ForceTagPos) {
            testConditions.emplace_back("forcing tag position");
        }
        cerr << endl << "MP4 maker - testmode " << m_mode << ": " << joinStrings(testConditions, ", ") << endl;

        // do actual tests
        // -> either remove tags or set test meta data
        m_tagStatus = (m_mode & RemoveTagOrTrack) ? TagStatus::Removed : TagStatus::TestMetaDataPresent;
        void (OverallTests::*modifyRoutine)(void) = (m_mode & RemoveTagOrTrack) ? &OverallTests::removeAllTags : &OverallTests::setMp4TestMetaData;
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/mp4/10-DanseMacabreOp.40.m4a"), modifyRoutine, &OverallTests::checkMp4Testfile1);
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/mp4/1080p-DTS-HD-7.1.mp4"), modifyRoutine, &OverallTests::checkMp4Testfile2);
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/mp4/dash/dragon-age-inquisition-H1LkM6IVlm4-video.mp4"), modifyRoutine, &OverallTests::checkMp4Testfile3);
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/alac/othertest-itunes.m4a"), modifyRoutine, &OverallTests::checkMp4Testfile4);
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/aac/he-aacv2-ps.m4a"), modifyRoutine, &OverallTests::checkMp4Testfile5);
        // -> add/remove tracks
        modifyRoutine = (m_mode & RemoveTagOrTrack) ? &OverallTests::removeSecondTrack : &OverallTests::alterMp4Tracks;
        m_fileInfo.setTagPosition(ElementPosition::Keep);
        makeFile(TestUtilities::workingCopyPath("mtx-test-data/mp4/1080p-DTS-HD-7.1.mp4"), modifyRoutine, &OverallTests::checkMp4Testfile6);
    }
}
#endif