* Accelerate vImage Swift Overlays
A suite of functions, enumerations, and option sets to make working with vImage in Swift simpler.
* vImage_Buffer - new initializers to instantiate and initialize buffers with a single function call.
* vImage_Buffer - new functions to copy buffers and create CGImage instances from contents.
* vImage_CGImageFormat - new initializers.
* vImage_CGImageFormat - new equivalence operator.
* vImageConverter - methods to wrap free functions.
* vImageConverter - new make and convert functions.
* vImageCVImageFormat - new make functions.
* vImageCVImageFormat - methods to wrap free functions.
* vImage_Error - errorDescription function.
* vImage flags as an option set.
* Add new methods for generating CV -> CG and CG -> CV converters.
* update comments: `height` and `width` to `size`.
* `vImage_CGImageFormat.componentCount` should be `Int`.
* `vImage_CGImageFormat.componentCount` should be `Int`
* Move `self.init()` to after the size check for kvImageNoAllocate init.
* Buffer initializers to width and height rather than size.
* change vImage_CGImageFormat lightweight initializer to accept Int for `bitsPerComponent` and `bitsPerPixel`.
* Flesh out docs for vImage_Buffer.size
* Remove faux initializer in favor of new static function: `preferredAlignmentAndRowBytes`.
* Change functions to use proper error handling rather than inout error codes.
* Removed `flags` from basic init.
The only real flag to pass here is print diagnostics to console, and I now throw proper errors.
* Tests to check error throwing for buffer copy.
* remove unnecessary import, add missing docs.
* Add comments to error enums.
* Fix bug creating string from format code.
* Make `vImageCVImageFormat.formatCode` a `UInt32`.
* Remove equivalence operator from `CGImageFormat`.
* Swift overlay to vDSP cascaded biquad IIR filter.
* update comment in test
* Swift overlay to vDSP Discrete Cosine Transform
* Swift Overlays to vDSP Fast Fourier Transform and Discrete Fourier Transform
* Tests for DFT and FFT
* Some refactoring and begin documentation.
* Swift overlays to FFT and DFT operations.
* Expand docs.
* Implement `vDSP_destroy_fftsetup` and `vDSP_destroy_fftsetupD`
* Refactor Tests
* Refactor Tests
* Provide transform function that returns the result. Refactoring: parameter names more consistent with other vDSP operations, push `fileprivate` symbols to bottom of file.
* Add apply() function that returns the result.
* Added a version of DFT transform that returns the result.
* update some DFT comments
* Remove FFT overlays from this branch to separate DFT and FFT pull requests.
* [Accelerate] [vDSP] Swift Overlays to FFT Operations
This PR contains Swift overlays to simplify performing 1D and 2D fast Fourier transforms on single- and double-precision data.
This PR includes a subset of the operations (e.g. vDSP_fft_zrop for FFT). My plan is to add the additional operations (e.g. multiple signals, in-place operations, etc.) in a subsequent PR once this is approved.
cc: @moiseev @airspeedswift @stephentyrone
* Composite Branch
Contains FFT, DFT, DCT, and Biquad branches.
* [Accelerate] [vForce] New vForce Overlay
This PR contains a suite of overlays to the vForce transcendental and trigonometric functions on vectors of any length. The overlays simplify the API to the existing functions and accept collections that implement a new protocol called AccelerateBuffer. Conformances are provided for the most useful stdlib Collections.
