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decklink: Query for preroll frame count

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Three is recommended though, so use at least that many.
This commit is contained in:
jpark37
2023-03-28 13:47:36 -07:00
committed by Jim
parent b3b5e7eae8
commit e4a80d0396
6 changed files with 29 additions and 7 deletions
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20
plugins/decklink/decklink-device-instance.cpp
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@@ -614,8 +614,9 @@ bool DeckLinkDeviceInstance::StartOutput(DeckLinkDeviceMode *mode_)
}
frameData.clear();
size_t i = 0;
for (; i < 3; ++i) {
const int64_t minimumPrerollFrames =
std::max(device->GetMinimumPrerollFrames(), INT64_C(3));
for (int64_t i = 0; i < minimumPrerollFrames; ++i) {
ComPtr<IDeckLinkMutableVideoFrame> decklinkOutputFrame;
HRESULT result = output_->CreateVideoFrame(
decklinkOutput->GetWidth(), decklinkOutput->GetHeight(),
@@ -630,11 +631,18 @@ bool DeckLinkDeviceInstance::StartOutput(DeckLinkDeviceMode *mode_)
const long size = decklinkOutputFrame->GetRowBytes() *
decklinkOutputFrame->GetHeight();
frameData.resize(size);
output_->ScheduleVideoFrame(decklinkOutputFrame,
(i * frameDuration), frameDuration,
frameTimescale);
result = output_->ScheduleVideoFrame(decklinkOutputFrame,
i * frameDuration,
frameDuration,
frameTimescale);
if (result != S_OK) {
blog(LOG_ERROR,
"failed to schedule video frame for preroll 0x%X",
result);
return false;
}
}
totalFramesScheduled = i;
totalFramesScheduled = minimumPrerollFrames;
*renderDelegate.Assign() =
new RenderDelegate<DeckLinkDeviceInstance>(this);