ref: 20a33fbea1a4c2b1d2df9858e4ccc9527d54bb0e
dir: /src/fmat.h/
/* Copyright (C) 2009-2015 Paul Brossier <piem@aubio.org> This file is part of aubio. aubio 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 3 of the License, or (at your option) any later version. aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>. */ #ifndef AUBIO_FMAT_H #define AUBIO_FMAT_H #ifdef __cplusplus extern "C" { #endif /** \file Matrix of real valued data This file specifies the fmat_t type, which is used in aubio to store arrays of floating point values. \example test-fmat.c */ /** Buffer for real data */ typedef struct { uint_t length; /**< length of matrix */ uint_t height; /**< height of matrix */ smpl_t **data; /**< data array of size [length] * [height] */ } fmat_t; /** fmat_t buffer creation function \param length the length of the matrix to create \param height the height of the matrix to create */ fmat_t * new_fmat(uint_t height, uint_t length); /** fmat_t buffer deletion function \param s buffer to delete as returned by new_fmat() */ void del_fmat(fmat_t *s); /** read sample value in a buffer \param s vector to read from \param channel channel to read from \param position sample position to read from */ smpl_t fmat_get_sample(const fmat_t *s, uint_t channel, uint_t position); /** write sample value in a buffer \param s vector to write to \param data value to write in s->data[channel][position] \param channel channel to write to \param position sample position to write to */ void fmat_set_sample(fmat_t *s, smpl_t data, uint_t channel, uint_t position); /** read channel vector from a buffer \param s vector to read from \param channel channel to read from \param output ::fvec_t to output to */ void fmat_get_channel (const fmat_t *s, uint_t channel, fvec_t *output); /** get vector buffer from an fmat data \param s vector to read from \param channel channel to read from */ smpl_t * fmat_get_channel_data (const fmat_t *s, uint_t channel); /** read data from a buffer \param s vector to read from */ smpl_t ** fmat_get_data(const fmat_t *s); /** print out fmat data \param s vector to print out */ void fmat_print(const fmat_t *s); /** set all elements to a given value \param s vector to modify \param val value to set elements to */ void fmat_set(fmat_t *s, smpl_t val); /** set all elements to zero \param s vector to modify */ void fmat_zeros(fmat_t *s); /** set all elements to ones \param s vector to modify */ void fmat_ones(fmat_t *s); /** revert order of vector elements \param s vector to revert */ void fmat_rev(fmat_t *s); /** apply weight to vector If the weight vector is longer than s, only the first elements are used. If the weight vector is shorter than s, the last elements of s are not weighted. \param s vector to weight \param weight weighting coefficients */ void fmat_weight(fmat_t *s, const fmat_t *weight); /** make a copy of a matrix \param s source vector \param t vector to copy to */ void fmat_copy(const fmat_t *s, fmat_t *t); /** compute the product of a matrix by a vector \param s matrix to compute product with \param scale vector to compute product with \param output vector to store restults in */ void fmat_vecmul(const fmat_t *s, const fvec_t *scale, fvec_t *output); #ifdef __cplusplus } #endif #endif /* AUBIO_FMAT_H */