bool
WMFReader::InitializeDXVA()
{
if (!Preferences::GetBool("media.windows-media-foundation.use-dxva", false)) {
return false;
}
MOZ_ASSERT(mDecoder->GetImageContainer());
// Extract the layer manager backend type so that we can determine
// whether it's worthwhile using DXVA. If we're not running with a D3D
// layer manager then the readback of decoded video frames from GPU to
// CPU memory grinds painting to a halt, and makes playback performance
// *worse*.
MediaDecoderOwner* owner = mDecoder->GetOwner();
NS_ENSURE_TRUE(owner, false);
HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, false);
nsRefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE(layerManager, false);
if (layerManager->GetBackendType() != LayersBackend::LAYERS_D3D9 &&
layerManager->GetBackendType() != LayersBackend::LAYERS_D3D10) {
return false;
}
mDXVA2Manager = DXVA2Manager::Create();
return mDXVA2Manager != nullptr;
}
void
MediaDecoder::OnDecoderDoctorEvent(DecoderDoctorEvent aEvent)
{
MOZ_ASSERT(NS_IsMainThread());
// OnDecoderDoctorEvent is disconnected at shutdown time.
MOZ_DIAGNOSTIC_ASSERT(!IsShutdown());
HTMLMediaElement* element = mOwner->GetMediaElement();
if (!element) {
return;
}
nsIDocument* doc = element->OwnerDoc();
if (!doc) {
return;
}
DecoderDoctorDiagnostics diags;
diags.StoreEvent(doc, aEvent, __func__);
}
