Ciglet is a lightweight C library for digital signal processing, in particular audio and speech processing.
Language: C99
License: BSD
In the past few years I've been writing and maintaining quite a few C-written speech processing projects (e.g. libllsm, libpyin, moresampler), some of which were partially translated from Matlab/Octave-based prototypes. Gradually I ended up having lots of frequent rewrites of C version of Matlab routines such as sum, fir1, conv, interp1, etc. In August 2016 I finally made the move to extract all these repeating patterns and group them into one independent library. Since it would be referred by quite a few projects, the new library is meant to be lightweight, easy to link, and fast, which is why it's named ciglet, an acronym of "C-written sIGnal codeLETs".
randu, randnmax, min, linterp, fastatan2c_cplx, c_conj, c_add, c_sub, c_mul, c_div, c_exp, c_abs, c_argsumfp, sumsqrfp, maxfp, minfpmeanfp, varfp, medianfp, xcorr, corr, covselectnth, sortfind_peak, find_valley, find_maxima, find_minimafzero, polyval, roots
matmul, mvecmul, dotlu, lusolveppivot, permm, permvlinspace, iotamalloc2d, free2d, copy2d, flatten, reshape, transposewavread, wavwrite
boxcar, hanning, hamming, mltsine, blackman_harris, nuttall98, blackmanfft, ifft, czt, iczt, idft, dct, fftshiftwrap, unwrap, phase_diffabscplx, argcplx, polar2real, polar2imag, complete_symm, complete_asymmrceps, irceps, minphasefir1, conv, filter, filtfilt, moving_avg, moving_rms, medfilt1, kalmanf1d, kalmans1dlevinson, lpc, flpc, lpgain, lpspec, lpresfinterp1, interp1u, sincinterp1u, interp_in_blank, rresamplegensin, gensins, safe_aliased_sinc, safe_aliased_dsincfetch_frame, diff, cumsum, flip ,white_noise, itakura_saitomel2freq, freq2mel, freq2bark, bark2freq, eqloud, melspaceifdetector_estimate, correlogram, invcrgmstft, istft, qifft, spgm2cegm, cegm2spgmfilterbank_spgm, filterbank_spec, be2cc, be2ccgmspec2envlfmodel_from_rd, lfmodel_spectrum, lfmodel_periodplotopen, plot, imagesc, plotclose