nsresult
WMFReader::Init(MediaDecoderReader* aCloneDonor)
{
NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
nsresult rv = WMFDecoder::LoadDLLs();
NS_ENSURE_SUCCESS(rv, rv);
if (FAILED(wmf::MFStartup())) {
NS_WARNING("Failed to initialize Windows Media Foundation");
return NS_ERROR_FAILURE;
}
mSourceReaderCallback = new WMFSourceReaderCallback();
// Must be created on main thread.
mByteStream = new WMFByteStream(mDecoder->GetResource(), mSourceReaderCallback);
rv = mByteStream->Init();
NS_ENSURE_SUCCESS(rv, rv);
if (mDecoder->GetImageContainer() != nullptr &&
IsVideoContentType(mDecoder->GetResource()->GetContentType())) {
mUseHwAccel = InitializeDXVA();
} else {
mUseHwAccel = false;
}
return NS_OK;
}
void
MP4Reader::InitLayersBackendType()
{
if (!IsVideoContentType(mDecoder->GetResource()->GetContentType())) {
// Not playing video, we don't care about the layers backend type.
return;
}
// Extract the layer manager backend type so that platform decoders
// can determine whether it's worthwhile using hardware accelerated
// video decoding.
MediaDecoderOwner* owner = mDecoder->GetOwner();
if (!owner) {
NS_WARNING("MP4Reader without a decoder owner, can't get HWAccel");
return;
}
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
nsRefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE_VOID(layerManager);
mLayersBackendType = layerManager->GetCompositorBackendType();
}
