/* Effect: change sample rate  Copyright (c) 2008,12 robs@users.sourceforge.net * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or (at * your option) any later version. * * This library 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 Lesser * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA */ /* Resample using a non-interpolated poly-phase FIR with length LEN.*//* Input must be followed by LEN-1 samples. */ #define _ sum += (coef(p->shared->poly_fir_coefs, 0, FIR_LENGTH, divided.rem, 0, j)) *at[j], ++j; static void FUNCTION(stage_t * p, fifo_t * output_fifo){  sample_t const * input = stage_read_p(p);  int i, num_in = stage_occupancy(p), max_num_out = 1 + num_in*p->out_in_ratio;  sample_t * output = fifo_reserve(output_fifo, max_num_out);  div_t divided2;   for (i = 0; p->at.parts.integer < num_in * p->L; ++i, p->at.parts.integer += p->step.parts.integer) {    div_t divided = div(p->at.parts.integer, p->L);    sample_t const * at = input + divided.quot;    sample_t sum = 0;    int j = 0;    CONVOLVE    USED(j);    output[i] = sum;  }  assert(max_num_out - i >= 0);  fifo_trim_by(output_fifo, max_num_out - i);  divided2 = div(p->at.parts.integer, p->L);  fifo_read(&p->fifo, divided2.quot, NULL);  p->at.parts.integer = divided2.rem;} #undef _#undef CONVOLVE#undef FIR_LENGTH#undef FUNCTION