//Возвращает информацию о медиа файле (если таковая доступна)
//Как правило, подобную информацию предоставляют т.н. 'parser filters'
//Перед вызовом этой функции желательно вызвать UpdateFGFiltersArray()
//В случае ошибки функция вернет значение меньше нуля
int CDirectShow::GetMediaContent(LPMEDIACONTENT pMC)
{
if (!m_lFGFilCount) return -1;
IAMMediaContent *pAMMediaContent = NULL;
BSTR bstrTmp;
for (m_lCounter = 0; m_lCounter < m_lFGFilCount; m_lCounter++)
{
if (!m_pFGBaseFilter[m_lCounter]) return -1;
m_pFGBaseFilter[m_lCounter]->QueryInterface(IID_IAMMediaContent, (LPVOID *)&pAMMediaContent);
if (!pAMMediaContent)
{
if (m_lCounter >= (m_lFGFilCount - 1)) return -1;
}
else break;
}
//Копируем на один символ меньше, чем позволяют соответствующие члены структуры
//Это на случай, если строка окажется больше и null-char просто не скопируется
if (SUCCEEDED(pAMMediaContent->get_AuthorName(&bstrTmp)))
{
wcsncpy(pMC->Author, bstrTmp, 63);
SysFreeString(bstrTmp);
}
if (SUCCEEDED(pAMMediaContent->get_Title(&bstrTmp)))
{
wcsncpy(pMC->Title, bstrTmp, 63);
SysFreeString(bstrTmp);
}
if (SUCCEEDED(pAMMediaContent->get_Rating(&bstrTmp)))
{
wcsncpy(pMC->Rating, bstrTmp, 63);
SysFreeString(bstrTmp);
}
if (SUCCEEDED(pAMMediaContent->get_Copyright(&bstrTmp)))
{
wcsncpy(pMC->Copyright, bstrTmp, 127);
SysFreeString(bstrTmp);
}
if (SUCCEEDED(pAMMediaContent->get_Description(&bstrTmp)))
{
wcsncpy(pMC->Description, bstrTmp, 254);
SysFreeString(bstrTmp);
}
if (SUCCEEDED(pAMMediaContent->get_MoreInfoText(&bstrTmp)))
{
wcsncpy(pMC->MoreInfo, bstrTmp, 254);
SysFreeString(bstrTmp);
}
pAMMediaContent->Release();
return 0;
}
void DirectShowMetaDataControl::updateMetadata(IFilterGraph2 *graph, IBaseFilter *source, const QString &fileSrc)
{
m_metadata.clear();
#ifndef QT_NO_SHELLITEM
if (!sHCreateItemFromParsingName) {
QSystemLibrary lib(QStringLiteral("shell32"));
sHCreateItemFromParsingName = (q_SHCreateItemFromParsingName)(lib.resolve("SHCreateItemFromParsingName"));
}
if (!fileSrc.isEmpty() && sHCreateItemFromParsingName) {
IShellItem2* shellItem = 0;
if (sHCreateItemFromParsingName(reinterpret_cast<const WCHAR*>(fileSrc.utf16()),
0, IID_PPV_ARGS(&shellItem)) == S_OK) {
IPropertyStore *pStore = 0;
if (shellItem->GetPropertyStore(GPS_DEFAULT, IID_PPV_ARGS(&pStore)) == S_OK) {
DWORD cProps;
if (SUCCEEDED(pStore->GetCount(&cProps))) {
for (DWORD i = 0; i < cProps; ++i)
{
PROPERTYKEY key;
PROPVARIANT var;
PropVariantInit(&var);
if (FAILED(pStore->GetAt(i, &key)))
continue;
if (FAILED(pStore->GetValue(key, &var)))
continue;
if (IsEqualPropertyKey(key, PKEY_Author)) {
m_metadata.insert(QMediaMetaData::Author, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Title)) {
m_metadata.insert(QMediaMetaData::Title, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_SubTitle)) {
m_metadata.insert(QMediaMetaData::SubTitle, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_ParentalRating)) {
m_metadata.insert(QMediaMetaData::ParentalRating, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Comment)) {
m_metadata.insert(QMediaMetaData::Description, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Copyright)) {
m_metadata.insert(QMediaMetaData::Copyright, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_ProviderStyle)) {
m_metadata.insert(QMediaMetaData::Genre, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_Year)) {
m_metadata.insert(QMediaMetaData::Year, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_DateEncoded)) {
m_metadata.insert(QMediaMetaData::Date, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Rating)) {
m_metadata.insert(QMediaMetaData::UserRating,
int((convertValue(var).toUInt() - 1) / qreal(98) * 100));
} else if (IsEqualPropertyKey(key, PKEY_Keywords)) {
m_metadata.insert(QMediaMetaData::Keywords, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Language)) {
m_metadata.insert(QMediaMetaData::Language, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_Publisher)) {
m_metadata.insert(QMediaMetaData::Publisher, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_Duration)) {
m_metadata.insert(QMediaMetaData::Duration,
(convertValue(var).toLongLong() + 10000) / 10000);
} else if (IsEqualPropertyKey(key, PKEY_Audio_EncodingBitrate)) {
m_metadata.insert(QMediaMetaData::AudioBitRate, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_AverageLevel)) {
m_metadata.insert(QMediaMetaData::AverageLevel, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Audio_ChannelCount)) {
m_metadata.insert(QMediaMetaData::ChannelCount, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Audio_PeakValue)) {
m_metadata.insert(QMediaMetaData::PeakValue, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Audio_SampleRate)) {
m_metadata.insert(QMediaMetaData::SampleRate, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_AlbumTitle)) {
m_metadata.insert(QMediaMetaData::AlbumTitle, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_AlbumArtist)) {
m_metadata.insert(QMediaMetaData::AlbumArtist, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Artist)) {
m_metadata.insert(QMediaMetaData::ContributingArtist, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Composer)) {
m_metadata.insert(QMediaMetaData::Composer, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Conductor)) {
m_metadata.insert(QMediaMetaData::Conductor, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Lyrics)) {
m_metadata.insert(QMediaMetaData::Lyrics, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Mood)) {
m_metadata.insert(QMediaMetaData::Mood, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_TrackNumber)) {
m_metadata.insert(QMediaMetaData::TrackNumber, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Music_Genre)) {
m_metadata.insert(QMediaMetaData::Genre, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_ThumbnailStream)) {
m_metadata.insert(QMediaMetaData::ThumbnailImage, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Video_FrameHeight)) {
QSize res;
res.setHeight(convertValue(var).toUInt());
if (SUCCEEDED(pStore->GetValue(PKEY_Video_FrameWidth, &var)))
res.setWidth(convertValue(var).toUInt());
m_metadata.insert(QMediaMetaData::Resolution, res);
} else if (IsEqualPropertyKey(key, PKEY_Video_HorizontalAspectRatio)) {
QSize aspectRatio;
aspectRatio.setWidth(convertValue(var).toUInt());
if (SUCCEEDED(pStore->GetValue(PKEY_Video_VerticalAspectRatio, &var)))
aspectRatio.setHeight(convertValue(var).toUInt());
m_metadata.insert(QMediaMetaData::PixelAspectRatio, aspectRatio);
} else if (IsEqualPropertyKey(key, PKEY_Video_FrameRate)) {
m_metadata.insert(QMediaMetaData::VideoFrameRate,
convertValue(var).toReal() / 1000);
} else if (IsEqualPropertyKey(key, PKEY_Video_EncodingBitrate)) {
m_metadata.insert(QMediaMetaData::VideoBitRate, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Video_Director)) {
m_metadata.insert(QMediaMetaData::Director, convertValue(var));
} else if (IsEqualPropertyKey(key, PKEY_Media_Writer)) {
m_metadata.insert(QMediaMetaData::Writer, convertValue(var));
}
PropVariantClear(&var);
}
}
pStore->Release();
}
shellItem->Release();
}
}
if (!m_metadata.isEmpty())
goto send_event;
#endif
#ifndef QT_NO_WMSDK
IWMHeaderInfo *info = com_cast<IWMHeaderInfo>(source, IID_IWMHeaderInfo);
if (info) {
Q_FOREACH (const QWMMetaDataKey &key, *qt_wmMetaDataKeys()) {
QVariant var = getValue(info, key.wmName);
if (var.isValid()) {
if (key.qtName == QMediaMetaData::Duration) {
// duration is provided in 100-nanosecond units, convert to milliseconds
var = (var.toLongLong() + 10000) / 10000;
} else if (key.qtName == QMediaMetaData::Resolution) {
QSize res;
res.setHeight(var.toUInt());
res.setWidth(getValue(info, L"WM/VideoWidth").toUInt());
var = res;
} else if (key.qtName == QMediaMetaData::VideoFrameRate) {
var = var.toReal() / 1000.f;
} else if (key.qtName == QMediaMetaData::PixelAspectRatio) {
QSize aspectRatio;
aspectRatio.setWidth(var.toUInt());
aspectRatio.setHeight(getValue(info, L"AspectRatioY").toUInt());
var = aspectRatio;
} else if (key.qtName == QMediaMetaData::UserRating) {
var = (var.toUInt() - 1) / qreal(98) * 100;
}
m_metadata.insert(key.qtName, var);
}
}
info->Release();
}
if (!m_metadata.isEmpty())
goto send_event;
#endif
{
IAMMediaContent *content = 0;
if ((!graph || graph->QueryInterface(
IID_IAMMediaContent, reinterpret_cast<void **>(&content)) != S_OK)
&& (!source || source->QueryInterface(
IID_IAMMediaContent, reinterpret_cast<void **>(&content)) != S_OK)) {
content = 0;
}
if (content) {
BSTR string = 0;
if (content->get_AuthorName(&string) == S_OK)
m_metadata.insert(QMediaMetaData::Author, convertBSTR(&string));
if (content->get_Title(&string) == S_OK)
m_metadata.insert(QMediaMetaData::Title, convertBSTR(&string));
if (content->get_Description(&string) == S_OK)
m_metadata.insert(QMediaMetaData::Description, convertBSTR(&string));
if (content->get_Rating(&string) == S_OK)
m_metadata.insert(QMediaMetaData::UserRating, convertBSTR(&string));
if (content->get_Copyright(&string) == S_OK)
m_metadata.insert(QMediaMetaData::Copyright, convertBSTR(&string));
content->Release();
}
}
send_event:
// DirectShowMediaPlayerService holds a lock at this point so defer emitting signals to a later
// time.
QCoreApplication::postEvent(this, new QEvent(QEvent::Type(MetaDataChanged)));
}
