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lavu/tx: add support for double precision FFT and MDCT

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Simply moves and templates the actual transforms to support an
additional data type.
Unlike the float version, which is equal or better than libfftw3f,
double precision output is bit identical with libfftw3.
This commit is contained in:
Lynne
2019-07-27 18:54:20 +01:00
parent f60b1211b2
commit 42e2319ba9
9 changed files with 825 additions and 677 deletions
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doc/APIchanges
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@@ -15,6 +15,9 @@ libavutil: 2017-10-21
API changes, most recent first:
2019-07-27 - xxxxxxxxxx - lavu 56.33.100 - tx.h
Add AV_TX_DOUBLE_FFT and AV_TX_DOUBLE_MDCT
-------- 8< --------- FFmpeg 4.2 was cut here -------- 8< ---------
2019-06-21 - a30e44098a - lavu 56.30.100 - frame.h