ref_iface_IVDXVideoSource_GetSampleNumberForFrame

VirtualDub Plugin SDK 1.2

IVDXVideoSource interface

IVDXVideoSource:: GetSampleNumberForFrame

Converts a sample number to the corresponding frame number.

sint64 GetSampleNumberForFrame(sint64 frame_num);

Parameters

sample_num

Frame number to convert to a sample number. This is always in the range of 0 to N-1, where N is the number of frames in the video source.

Thread safety

This method is not thread-safe.

Errors

Errors may not be returned from this function (see SetError()).

Return value

The sample number of the corresponding frame. This must be in the range of 0 to N-1, where N is the number of frames in the video source.

Remarks

This mapping must be reversible with GetFrameNumberForSample() — that is, GetFrameNumberForSample(GetSampleNumberForFrame(frame)) == frame in all cases.

When using the default I/P decoder model, this function must return sample_num directly.

---

Copyright (C) 2007-2012 Avery Lee.