ref: 98aa3da4d1102f24bc308203afa7282a9dbc1c67
dir: /libfaac/kiss_fft/CHANGELOG/
1.2.1 (April 4, 2004) compiles cleanly with just about every -W warning flag under the sun reorganized kiss_fft_state so it could be read-only/const. This may be useful for embedded systems that are willing to predeclare twiddle factors, factorization. Fixed C_MUL,S_MUL on 16-bit platforms. tmpbuf will only be allocated if input & output buffers are same scratchbuf will only be allocated for ffts that are not multiples of 2,3,5 NOTE: The tmpbuf,scratchbuf changes may require synchronization code for multi-threaded apps. 1.2 (Feb 23, 2004) interface change -- cfg object is forward declaration of struct instead of void* This maintains type saftey and lets the compiler warn/error about stupid mistakes. (prompted by suggestion from Erik de Castro Lopo) small speed improvements added psdpng.c -- sample utility that will create png spectrum "waterfalls" from an input file ( not terribly useful yet) 1.1.1 (Feb 1, 2004 ) minor bug fix -- only affects odd rank, in-place, multi-dimensional FFTs 1.1 : (Jan 30,2004) split sample_code/ into test/ and tools/ Removed 2-D fft and added N-D fft (arbitrary) modified fftutil.c to allow multi-d FFTs Modified core fft routine to allow an input stride via kiss_fft_stride() (eased support of multi-D ffts) Added fast convolution filtering (FIR filtering using overlap-scrap method, with tail scrap) Add kfc.[ch]: the KISS FFT Cache. It takes care of allocs for you ( suggested by Oscar Lesta ). 1.0.1 (Dec 15, 2003) fixed bug that occurred when nfft==1 1.0 : (Dec 14, 2003) changed kiss_fft function from using a single buffer, to two buffers. If the same buffer pointer is supplied for both in and out, kiss will manage the buffer copies. added kiss_fft2d and kiss_fftr as separate source files (declarations in kiss_fft.h ) 0.4 :(Nov 4,2003) optimized for radix 2,3,4,5 0.3 :(Oct 28, 2003) woops, version 2 didn't actually factor out any radices other than 2 0.2 :(Oct 27, 2003) added mixed radix, only radix 2,4 optimized versions 0.1 :(May 19 2003) initial release, radix 2 only