feat: add DeckLink input and output nodes
decklink-in:
- IDeckLinkInputCallback::VideoInputFrameArrived captures V210 frames
- Frame data stored with mutex, copied to MXL grain in process thread
- Uses mxlSleepUntil for TAI-time-based grain pacing
- Configurable: device_index (int), mode (1080i50/1080p50/etc)
- Auto-detect input format via bmdVideoInputEnableFormatDetection
- 1 output port: video_out (V210)
decklink-out:
- Reads V210 grains from MXL, schedules playback via DeckLink output
- Creates IDeckLinkMutableVideoFrame, copies grain data, schedules
- Uses ScheduledFrameCompleted callback for frame completion
- Configurable: device_index (int), mode (1080i50/1080p50/etc)
- 1 input port: video_in (V210)
Both nodes:
- Use DeckLinkAPIDispatch.cpp for CreateDeckLinkIteratorInstance
- Access pixel data via IDeckLinkVideoBuffer (latest SDK API)
- Graceful device open/close on writer/reader add/remove
- Build conditionally via DMF_BUILD_DECKLINK + DECKLINK_SDK_DIR
Johanness
d02223224f