/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** $QT_END_LICENSE$
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****************************************************************************/

#include <qmediametadata.h>
#include <qdatetime.h>
#include <qimage.h>

#include "mfmetadatacontrol.h"
#include "mfplayerservice.h"
#include "Propkey.h"

//#define DEBUG_MEDIAFOUNDATION

static QString nameForGUID(GUID guid)
{
    // Audio formats
    if (guid == MFAudioFormat_AAC)
        return QStringLiteral("MPEG AAC Audio");
    else if (guid == MFAudioFormat_ADTS)
        return QStringLiteral("MPEG ADTS AAC Audio");
    else if (guid == MFAudioFormat_Dolby_AC3_SPDIF)
        return QStringLiteral("Dolby AC-3 SPDIF");
    else if (guid == MFAudioFormat_DRM)
        return QStringLiteral("DRM");
    else if (guid == MFAudioFormat_DTS)
        return QStringLiteral("Digital Theater Systems Audio (DTS)");
    else if (guid == MFAudioFormat_Float)
        return QStringLiteral("IEEE Float Audio");
    else if (guid == MFAudioFormat_MP3)
        return QStringLiteral("MPEG Audio Layer-3 (MP3)");
    else if (guid == MFAudioFormat_MPEG)
        return QStringLiteral("MPEG-1 Audio");
    else if (guid == MFAudioFormat_MSP1)
        return QStringLiteral("Windows Media Audio Voice");
    else if (guid == MFAudioFormat_PCM)
        return QStringLiteral("Uncompressed PCM Audio");
    else if (guid == MFAudioFormat_WMASPDIF)
        return QStringLiteral("Windows Media Audio 9 SPDIF");
    else if (guid == MFAudioFormat_WMAudioV8)
        return QStringLiteral("Windows Media Audio 8 (WMA2)");
    else if (guid == MFAudioFormat_WMAudioV9)
        return QStringLiteral("Windows Media Audio 9 (WMA3");
    else if (guid == MFAudioFormat_WMAudio_Lossless)
        return QStringLiteral("Windows Media Audio 9 Lossless");

    // Video formats
    if (guid == MFVideoFormat_DV25)
        return QStringLiteral("DVCPRO 25 (DV25)");
    else if (guid == MFVideoFormat_DV50)
        return QStringLiteral("DVCPRO 50 (DV50)");
    else if (guid == MFVideoFormat_DVC)
        return QStringLiteral("DVC/DV Video");
    else if (guid == MFVideoFormat_DVH1)
        return QStringLiteral("DVCPRO 100 (DVH1)");
    else if (guid == MFVideoFormat_DVHD)
        return QStringLiteral("HD-DVCR (DVHD)");
    else if (guid == MFVideoFormat_DVSD)
        return QStringLiteral("SDL-DVCR (DVSD)");
    else if (guid == MFVideoFormat_DVSL)
        return QStringLiteral("SD-DVCR (DVSL)");
    else if (guid == MFVideoFormat_H264)
        return QStringLiteral("H.264 Video");
    else if (guid == MFVideoFormat_M4S2)
        return QStringLiteral("MPEG-4 part 2 Video (M4S2)");
    else if (guid == MFVideoFormat_MJPG)
        return QStringLiteral("Motion JPEG (MJPG)");
    else if (guid == MFVideoFormat_MP43)
        return QStringLiteral("Microsoft MPEG 4 version 3 (MP43)");
    else if (guid == MFVideoFormat_MP4S)
        return QStringLiteral("ISO MPEG 4 version 1 (MP4S)");
    else if (guid == MFVideoFormat_MP4V)
        return QStringLiteral("MPEG-4 part 2 Video (MP4V)");
    else if (guid == MFVideoFormat_MPEG2)
        return QStringLiteral("MPEG-2 Video");
    else if (guid == MFVideoFormat_MPG1)
        return QStringLiteral("MPEG-1 Video");
    else if (guid == MFVideoFormat_MSS1)
        return QStringLiteral("Windows Media Screen 1 (MSS1)");
    else if (guid == MFVideoFormat_MSS2)
        return QStringLiteral("Windows Media Video 9 Screen (MSS2)");
    else if (guid == MFVideoFormat_WMV1)
        return QStringLiteral("Windows Media Video 7 (WMV1)");
    else if (guid == MFVideoFormat_WMV2)
        return QStringLiteral("Windows Media Video 8 (WMV2)");
    else if (guid == MFVideoFormat_WMV3)
        return QStringLiteral("Windows Media Video 9 (WMV3)");
    else if (guid == MFVideoFormat_WVC1)
        return QStringLiteral("Windows Media Video VC1 (WVC1)");

    else
        return QStringLiteral("Unknown codec");
}

MFMetaDataControl::MFMetaDataControl(QObject *parent)
    : QMetaDataReaderControl(parent)
    , m_metaData(0)
    , m_content(0)
{
}

MFMetaDataControl::~MFMetaDataControl()
{
    if (m_metaData)
        m_metaData->Release();
    if (m_content)
        m_content->Release();
}

bool MFMetaDataControl::isMetaDataAvailable() const
{
    return m_content || m_metaData;
}

QVariant MFMetaDataControl::metaData(const QString &key) const
{
    QVariant value;
    if (!isMetaDataAvailable())
        return value;

    int index = m_availableMetaDatas.indexOf(key);
    if (index < 0)
        return value;

    PROPVARIANT var;
    PropVariantInit(&var);
    HRESULT hr = S_FALSE;
    if (m_content)
        hr = m_content->GetValue(m_commonKeys[index], &var);
    else if (m_metaData)
        hr = m_metaData->GetProperty(reinterpret_cast<LPCWSTR>(m_commonNames[index].utf16()), &var);

    if (SUCCEEDED(hr)) {
        value = convertValue(var);

        // some metadata needs to be reformatted
        if (value.isValid() && m_content) {
            if (key == QMediaMetaData::MediaType) {
                QString v = value.toString();
                if (v == QLatin1String("{D1607DBC-E323-4BE2-86A1-48A42A28441E}"))
                    value = QStringLiteral("Music");
                else if (v == QLatin1String("{DB9830BD-3AB3-4FAB-8A37-1A995F7FF74B}"))
                    value = QStringLiteral("Video");
                else if (v == QLatin1String("{01CD0F29-DA4E-4157-897B-6275D50C4F11}"))
                    value = QStringLiteral("Audio");
                else if (v == QLatin1String("{FCF24A76-9A57-4036-990D-E35DD8B244E1}"))
                    value = QStringLiteral("Other");
            } else if (key == QMediaMetaData::Duration) {
                // duration is provided in 100-nanosecond units, convert to milliseconds
                value = (value.toLongLong() + 10000) / 10000;
            } else if (key == QMediaMetaData::AudioCodec || key == QMediaMetaData::VideoCodec) {
                GUID guid;
                if (SUCCEEDED(CLSIDFromString((const WCHAR*)value.toString().utf16(), &guid)))
                    value = nameForGUID(guid);
            } else if (key == QMediaMetaData::Resolution) {
                QSize res;
                res.setHeight(value.toUInt());
                if (m_content && SUCCEEDED(m_content->GetValue(PKEY_Video_FrameWidth, &var)))
                    res.setWidth(convertValue(var).toUInt());
                value = res;
            } else if (key == QMediaMetaData::PixelAspectRatio) {
                QSize aspectRatio;
                aspectRatio.setWidth(value.toUInt());
                if (m_content && SUCCEEDED(m_content->GetValue(PKEY_Video_VerticalAspectRatio, &var)))
                    aspectRatio.setHeight(convertValue(var).toUInt());
                value = aspectRatio;
            } else if (key == QMediaMetaData::VideoFrameRate) {
                value = value.toReal() / 1000.f;
            }
        }
    }

    PropVariantClear(&var);
    return value;
}

QVariant MFMetaDataControl::convertValue(const PROPVARIANT& var) const
{
    QVariant value;
    switch (var.vt) {
    case VT_LPWSTR:
        value = QString::fromUtf16(reinterpret_cast<const ushort*>(var.pwszVal));
        break;
    case VT_UI4:
        value = uint(var.ulVal);
        break;
    case VT_UI8:
        value = qulonglong(var.uhVal.QuadPart);
        break;
    case VT_BOOL:
        value = bool(var.boolVal);
        break;
    case VT_FILETIME:
        SYSTEMTIME sysDate;
        if (!FileTimeToSystemTime(&var.filetime, &sysDate))
            break;
        value = QDate(sysDate.wYear, sysDate.wMonth, sysDate.wDay);
        break;
    case VT_STREAM:
    {
        STATSTG stat;
        if (FAILED(var.pStream->Stat(&stat, STATFLAG_NONAME)))
            break;
        void *data = malloc(stat.cbSize.QuadPart);
        ULONG read = 0;
        if (FAILED(var.pStream->Read(data, stat.cbSize.QuadPart, &read))) {
            free(data);
            break;
        }
        value = QImage::fromData((const uchar*)data, read);
        free(data);
    }
        break;
    case VT_VECTOR | VT_LPWSTR:
        QStringList vList;
        for (ULONG i = 0; i < var.calpwstr.cElems; ++i)
            vList.append(QString::fromUtf16(reinterpret_cast<const ushort*>(var.calpwstr.pElems[i])));
        value = vList;
        break;
    }
    return value;
}

QStringList MFMetaDataControl::availableMetaData() const
{
    return m_availableMetaDatas;
}

void MFMetaDataControl::updateSource(IMFPresentationDescriptor* sourcePD, IMFMediaSource* mediaSource)
{
    if (m_metaData) {
        m_metaData->Release();
        m_metaData = 0;
    }

    if (m_content) {
        m_content->Release();
        m_content = 0;
    }

    m_availableMetaDatas.clear();
    m_commonKeys.clear();
    m_commonNames.clear();

    if (SUCCEEDED(MFGetService(mediaSource, MF_PROPERTY_HANDLER_SERVICE, IID_PPV_ARGS(&m_content)))) {
        DWORD cProps;
        if (SUCCEEDED(m_content->GetCount(&cProps))) {
            for (DWORD i = 0; i < cProps; i++)
            {
                PROPERTYKEY key;
                if (FAILED(m_content->GetAt(i, &key)))
                    continue;
                bool common = true;
                if (key == PKEY_Author) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Author);
                } else if (key == PKEY_Title) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Title);
                } else if (key == PKEY_Media_SubTitle) {
                    m_availableMetaDatas.push_back(QMediaMetaData::SubTitle);
                } else if (key == PKEY_ParentalRating) {
                    m_availableMetaDatas.push_back(QMediaMetaData::ParentalRating);
                } else if (key == PKEY_Comment) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Description);
                } else if (key == PKEY_Copyright) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Copyright);
                } else if (key == PKEY_Comment) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Comment);
                } else if (key == PKEY_Media_ProviderStyle) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Genre);
                } else if (key == PKEY_Media_Year) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Year);
                } else if (key == PKEY_Media_DateEncoded) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Date);
                } else if (key == PKEY_Rating) {
                    m_availableMetaDatas.push_back(QMediaMetaData::UserRating);
                } else if (key == PKEY_Keywords) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Keywords);
                } else if (key == PKEY_Language) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Language);
                } else if (key == PKEY_Media_Publisher) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Publisher);
                } else if (key == PKEY_Media_ClassPrimaryID) {
                    m_availableMetaDatas.push_back(QMediaMetaData::MediaType);
                } else if (key == PKEY_Media_Duration) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Duration);
                } else if (key == PKEY_Audio_EncodingBitrate) {
                    m_availableMetaDatas.push_back(QMediaMetaData::AudioBitRate);
                } else if (key == PKEY_Audio_Format) {
                    m_availableMetaDatas.push_back(QMediaMetaData::AudioCodec);
                } else if (key == PKEY_Media_AverageLevel) {
                    m_availableMetaDatas.push_back(QMediaMetaData::AverageLevel);
                } else if (key == PKEY_Audio_ChannelCount) {
                    m_availableMetaDatas.push_back(QMediaMetaData::ChannelCount);
                } else if (key == PKEY_Audio_PeakValue) {
                    m_availableMetaDatas.push_back(QMediaMetaData::PeakValue);
                } else if (key == PKEY_Audio_SampleRate) {
                    m_availableMetaDatas.push_back(QMediaMetaData::SampleRate);
                } else if (key == PKEY_Music_AlbumTitle) {
                    m_availableMetaDatas.push_back(QMediaMetaData::AlbumTitle);
                } else if (key == PKEY_Music_AlbumArtist) {
                    m_availableMetaDatas.push_back(QMediaMetaData::AlbumArtist);
                } else if (key == PKEY_Music_Artist) {
                    m_availableMetaDatas.push_back(QMediaMetaData::ContributingArtist);
                } else if (key == PKEY_Music_Composer) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Composer);
                } else if (key == PKEY_Music_Conductor) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Conductor);
                } else if (key == PKEY_Music_Lyrics) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Lyrics);
                } else if (key == PKEY_Music_Mood) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Mood);
                } else if (key == PKEY_Music_TrackNumber) {
                    m_availableMetaDatas.push_back(QMediaMetaData::TrackNumber);
                } else if (key == PKEY_Music_Genre) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Genre);
                } else if (key == PKEY_ThumbnailStream) {
                    m_availableMetaDatas.push_back(QMediaMetaData::ThumbnailImage);
                } else if (key == PKEY_Video_FrameHeight) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Resolution);
                } else if (key == PKEY_Video_HorizontalAspectRatio) {
                    m_availableMetaDatas.push_back(QMediaMetaData::PixelAspectRatio);
                } else if (key == PKEY_Video_FrameRate) {
                    m_availableMetaDatas.push_back(QMediaMetaData::VideoFrameRate);
                } else if (key == PKEY_Video_EncodingBitrate) {
                    m_availableMetaDatas.push_back(QMediaMetaData::VideoBitRate);
                } else if (key == PKEY_Video_Compression) {
                    m_availableMetaDatas.push_back(QMediaMetaData::VideoCodec);
                } else if (key == PKEY_Video_Director) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Director);
                } else if (key == PKEY_Media_Writer) {
                    m_availableMetaDatas.push_back(QMediaMetaData::Writer);
                } else {
                    common = false;
                    //TODO: add more extended keys
                }
                if (common)
                    m_commonKeys.push_back(key);
            }
        } else {
            m_content->Release();
            m_content = NULL;
        }
    }

    if (!m_content) {
        //fallback to Vista approach
        IMFMetadataProvider *provider = NULL;
        if (SUCCEEDED(MFGetService(mediaSource, MF_METADATA_PROVIDER_SERVICE, IID_PPV_ARGS(&provider)))) {
            if (SUCCEEDED(provider->GetMFMetadata(sourcePD, 0, 0, &m_metaData))) {
                PROPVARIANT varNames;
                PropVariantInit(&varNames);
                if (SUCCEEDED(m_metaData->GetAllPropertyNames(&varNames)) && varNames.vt == (VT_VECTOR | VT_LPWSTR)) {
                    ULONG cElements = varNames.calpwstr.cElems;
                    for (ULONG i = 0; i < cElements; i++)
                    {
                        const WCHAR* sName = varNames.calpwstr.pElems[i];
#ifdef DEBUG_MEDIAFOUNDATION
                        qDebug() << "metadata: " << QString::fromUtf16(sName);
#endif
                        if (wcscmp(sName, L"Author") == 0) {
                            m_availableMetaDatas.push_back(QMediaMetaData::Author);
                        } else if (wcscmp(sName, L"Title") == 0) {
                            m_availableMetaDatas.push_back(QMediaMetaData::Title);
                        } else if (wcscmp(sName, L"Rating") == 0) {
                            m_availableMetaDatas.push_back(QMediaMetaData::ParentalRating);
                        } else if (wcscmp(sName, L"Description") == 0) {
                            m_availableMetaDatas.push_back(QMediaMetaData::Description);
                        } else if (wcscmp(sName, L"Copyright") == 0) {
                            m_availableMetaDatas.push_back(QMediaMetaData::Copyright);
                            //TODO: add more common keys
                        } else {
                            m_availableMetaDatas.push_back(QString::fromUtf16(reinterpret_cast<const ushort*>(sName)));
                        }
                        m_commonNames.push_back(QString::fromUtf16(reinterpret_cast<const ushort*>(sName)));
                    }
                }
                PropVariantClear(&varNames);
            } else {
                qWarning("Failed to get IMFMetadata");
            }
            provider->Release();
        } else {
            qWarning("Failed to get IMFMetadataProvider from source");
        }
    }

    emit metaDataChanged();
    emit metaDataAvailableChanged(m_metaData || m_content);
}
