ref: 6b48b2586d74e7aa37d305fc60d1987428a5a618
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