ref: e4f142c3109be03c707aec0081c4008f2b5813e8
dir: /src/utils/hist.c/
/* Copyright (C) 2003 Paul Brossier This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "aubio_priv.h" #include "fvec.h" #include "utils/scale.h" #include "mathutils.h" //fvec_min fvec_max #include "utils/hist.h" /******** * Object Structure */ struct _aubio_hist_t { fvec_t * hist; uint_t nelems; uint_t channels; fvec_t * cent; aubio_scale_t *scaler; }; /** * Object creation/deletion calls */ aubio_hist_t * new_aubio_hist (smpl_t ilow, smpl_t ihig, uint_t nelems, uint_t channels){ aubio_hist_t * s = AUBIO_NEW(aubio_hist_t); smpl_t step = (ihig-ilow)/(smpl_t)(nelems); smpl_t accum = step; uint_t i; s->channels = channels; s->nelems = nelems; s->hist = new_fvec(nelems, channels); s->cent = new_fvec(nelems, 1); /* use scale to map ilow/ihig -> 0/nelems */ s->scaler = new_aubio_scale(ilow,ihig,0,nelems); /* calculate centers now once */ s->cent->data[0][0] = ilow + 0.5 * step; for (i=1; i < s->nelems; i++, accum+=step ) s->cent->data[0][i] = s->cent->data[0][0] + accum; return s; } void del_aubio_hist(aubio_hist_t *s) { del_fvec(s->hist); del_fvec(s->cent); del_aubio_scale(s->scaler); AUBIO_FREE(s); } /*** * do it */ void aubio_hist_do (aubio_hist_t *s, fvec_t *input) { uint_t i,j; sint_t tmp = 0; aubio_scale_do(s->scaler, input); /* reset data */ for (i=0; i < s->channels; i++) for (j=0; j < s->nelems; j++) s->hist->data[i][j] = 0; /* run accum */ for (i=0; i < input->channels; i++) for (j=0; j < input->length; j++) { tmp = (sint_t)FLOOR(input->data[i][j]); if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) s->hist->data[i][tmp] += 1; } } void aubio_hist_do_notnull (aubio_hist_t *s, fvec_t *input) { uint_t i,j; sint_t tmp = 0; aubio_scale_do(s->scaler, input); /* reset data */ for (i=0; i < s->channels; i++) for (j=0; j < s->nelems; j++) s->hist->data[i][j] = 0; /* run accum */ for (i=0; i < input->channels; i++) for (j=0; j < input->length; j++) { if (input->data[i][j] != 0) { tmp = (sint_t)FLOOR(input->data[i][j]); if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) s->hist->data[i][tmp] += 1; } } } void aubio_hist_dyn_notnull (aubio_hist_t *s, fvec_t *input) { uint_t i,j; sint_t tmp = 0; smpl_t ilow = fvec_min(input); smpl_t ihig = fvec_max(input); smpl_t step = (ihig-ilow)/(smpl_t)(s->nelems); /* readapt */ aubio_scale_set_limits (s->scaler, ilow, ihig, 0, s->nelems); /* recalculate centers */ s->cent->data[0][0] = ilow + 0.5f * step; for (i=1; i < s->nelems; i++) s->cent->data[0][i] = s->cent->data[0][0] + i * step; /* scale */ aubio_scale_do(s->scaler, input); /* reset data */ for (i=0; i < s->channels; i++) for (j=0; j < s->nelems; j++) s->hist->data[i][j] = 0; /* run accum */ for (i=0; i < input->channels; i++) for (j=0; j < input->length; j++) { if (input->data[i][j] != 0) { tmp = (sint_t)FLOOR(input->data[i][j]); if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) s->hist->data[i][tmp] += 1; } } } void aubio_hist_weight (aubio_hist_t *s) { uint_t i,j; for (i=0; i < s->channels; i++) for (j=0; j < s->nelems; j++) { s->hist->data[i][j] *= s->cent->data[0][j]; } } smpl_t aubio_hist_mean (aubio_hist_t *s) { uint_t i,j; smpl_t tmp = 0.0; for (i=0; i < s->channels; i++) for (j=0; j < s->nelems; j++) tmp += s->hist->data[i][j]; return tmp/(smpl_t)(s->nelems); }