[FFmpeg-devel] [PATCH 1/2] lavu/tx: add real to real and real to imaginary RDFT transforms

[Lynne]

These are in-place transforms, required for DCT-I and DST-I.

Templated as the mod2 variant requires minor modifications, and is
required specifically for DCT-I/DST-I.

Quite optimized, as there's no need for any additional buffer storage.

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