/*  Copyright (C) 2003-2013 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/>. */  #include "aubio_priv.h"#include "fvec.h"#include "fmat.h"#include "io/source.h"#include "synth/sampler.h" struct _aubio_sampler_t {  uint_t samplerate;  uint_t blocksize;  aubio_source_t *source;  fvec_t *source_output;  fmat_t *source_output_multi;  char_t *uri;  uint_t playing;}; aubio_sampler_t *new_aubio_sampler(uint_t samplerate, uint_t blocksize){  aubio_sampler_t *s = AUBIO_NEW(aubio_sampler_t);  if ((sint_t)blocksize < 1) {    AUBIO_ERR("sampler: got blocksize %d, but can not be < 1\n", blocksize);    goto beach;  }  s->samplerate = samplerate;  s->blocksize = blocksize;  s->source_output = new_fvec(blocksize);  s->source_output_multi = new_fmat(4, blocksize);  s->source = NULL;  s->playing = 0;  return s;beach:  AUBIO_FREE(s);  return NULL;} uint_t aubio_sampler_load( aubio_sampler_t * o, const char_t * uri ){  if (o->source) del_aubio_source(o->source);   if (o->uri) AUBIO_FREE(o->uri);  o->uri = AUBIO_ARRAY(char_t, strnlen(uri, PATH_MAX));  strncpy(o->uri, uri, strnlen(uri, PATH_MAX));   o->source = new_aubio_source(uri, o->samplerate, o->blocksize);  if (o->source) return 0;  AUBIO_ERR("sampler: failed loading %s", uri);  return 1;} void aubio_sampler_do ( aubio_sampler_t * o, const fvec_t * input, fvec_t * output){  uint_t read = 0, i;  if (o->playing) {    aubio_source_do (o->source, o->source_output, &read);    for (i = 0; i < output->length; i++) {      output->data[i] += o->source_output->data[i];    }    if (read < o->blocksize) o->playing = 0;  }  if (input && input != output) {    for (i = 0; i < output->length; i++) {      output->data[i] += input->data[i];    }  }} void aubio_sampler_do_multi ( aubio_sampler_t * o, const fmat_t * input, fmat_t * output){  uint_t read = 0, i, j;  if (o->playing) {    aubio_source_do_multi (o->source, o->source_output_multi, &read);    for (i = 0; i < output->height; i++) {      for (j = 0; j < output->length; j++) {        output->data[i][j] += o->source_output_multi->data[i][j];      }    }    if ( read < o->blocksize ) o->playing = 0;  }  if (input && input != output) {    for (i = 0; i < output->height; i++) {      for (j = 0; j < output->length; j++) {        output->data[i][j] += input->data[i][j];      }    }  }} uint_t aubio_sampler_get_playing ( const aubio_sampler_t * o ){  return o->playing;} uint_t aubio_sampler_set_playing ( aubio_sampler_t * o, uint_t playing ){  o->playing = (playing == 1) ? 1 : 0;  return 0;} uint_t aubio_sampler_play ( aubio_sampler_t * o ){  aubio_source_seek (o->source, 0);  return aubio_sampler_set_playing (o, 1);} uint_t aubio_sampler_stop ( aubio_sampler_t * o ){  return aubio_sampler_set_playing (o, 0);} void del_aubio_sampler( aubio_sampler_t * o ){  if (o->source) {    del_aubio_source(o->source);  }  if (o->uri) AUBIO_FREE(o->uri);  del_fvec(o->source_output);  del_fmat(o->source_output_multi);  AUBIO_FREE(o);}