43 lines
3.6 KiB
Markdown
43 lines
3.6 KiB
Markdown
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# Release 0.7.1
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- Upgraded Rand to 0.8
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- Small style improvements to unsafe blocks
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# Release 0.7
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- Upgraded RustFFT to 6.0
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- Added consistent support for supplying oversized scratch to DCT methods. Instead of checking that the scratch buffer len is exactly the requested len, we now only check that it's greater than or equal to the requested len.
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- Documented the normalization of all DCT/DST methods.
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# Release 0.6
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- Upgraded RustFFT to 5.0
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- Renamed most stucts and traits in the library in order to conform to the [Rust API guidelines](https://rust-lang.github.io/api-guidelines/naming.html) on acronyms
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- Refactored all the process() methods to adopt a "in-place with scratch" architecture. This means that, for example, none of the "convert to FFT" algorithms have to allocate scratch space internally, because they now request it from the caller.
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# Release 0.5.1
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- Added a blanket impl for the DCTnum trait, making it easier to use arbitrary numeric types.
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# Release 0.5.0
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- Upgraded rustfft version from 3 to 4
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- Fixed warning spam from missing `dyn` keyword
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# Release 0.4.0
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- Renamed `Type2and3` to `TransformType2And3`
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- Renamed `Type4` to `TransformType4`
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- Upgraded rustfft version from ^2.1 to ^3
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- Added a size-3 butterfly for TransformType2And3
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# Release 0.3.0
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- Merged each DCT2 and DCT3 algorithm into a single struct that implements both both DCT2 and DCT3 traits, and created a "Type2And3" trait to encompass both. They both require the same precomputed data, so we can save memory and setup time by computing both fro mthe same trait.
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- Also implemented DST2 and DST3 on the Type2And3 trait -- so a single call to "plan_dct2" or "plan_dct3" etc will let you compute a DCT2, DST3, DCT3, DST3 all from the same instance.
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- DCT Type 4 instances can also compute DST Type 4. They implement the "Type4" trait, which includes both DCT4, and DST4.
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- Merged MDCT and IMDCT into the same trait
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- All of the above are breaking changes that will be very relevant to you if you're referring to specific algorithms or writing your own, but if you're just calling "plan_dct4" or etc, not much should be different.
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- Added a DST1 trait and added naive and FFT implementations
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- Added DST2, DST3, DST4 traits, and O(nlogn) implementations for each
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# Release 0.2.1
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- Removed the `pub` keyword from some methods on the `DCTplanner` that should not have been public
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# Release 0.2.0
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- All of the `DCT#ViaFFT` algorithms now allocate a Vec for internal scratch space, rather than using a member variable, allowing them to be immutable.
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- [Breaking Change] The `process` method of all DCT traits take `&self` instead of `&mut self`
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- [Breaking Change] Because all DCT instances are now immutable, all DCT instances that depend on other DCT instances take `Arc` pointers instead of `Box` pointers
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- [Breaking Change] Because all DCT instances are now immutable, the DCT planner now creates and stores `Arc` pointers to DCT instances instead of `Box`, and has a cache of algorithm instances for each DCT type
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- Implemented a "split radix" algorithm for DCT2 and DCT3 that processes power-of-two DCTs much faster than converting them to FFTs
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- Used the split radix alogirthm to derive several hardcoded "butterfly" algorithms for small DCT2 and DCT3 sizes (specifically, sizes 2,4,8,16)
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- [Breaking Change] Deleted the obsolete `DCT4ViaFFT` algorithm. For odd sizes, use `DCT4ViaFFTOdd` instead. For even sizes, use `DCT4ViaDCT3`. Both are considerably faster and use considerably less memory in all scenarios.
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- Lots of style improvements
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# Prior releases
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No prior release notes were kept.
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