Home | History | Annotate | Download | only in libspeexdsp 
      1 /* Copyright (C) 2007 Jean-Marc Valin
      2 
      3    File: testresample.c
      4    Testing the resampling code
      5 
      6    Redistribution and use in source and binary forms, with or without
      7    modification, are permitted provided that the following conditions are
      8    met:
      9 
     10    1. Redistributions of source code must retain the above copyright notice,
     11    this list of conditions and the following disclaimer.
     12 
     13    2. Redistributions in binary form must reproduce the above copyright
     14    notice, this list of conditions and the following disclaimer in the
     15    documentation and/or other materials provided with the distribution.
     16 
     17    3. The name of the author may not be used to endorse or promote products
     18    derived from this software without specific prior written permission.
     19 
     20    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     23    DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     24    INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     25    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     26    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     28    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     29    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30    POSSIBILITY OF SUCH DAMAGE.
     31 */
     32 
     33 #ifdef HAVE_CONFIG_H
     34 #include "config.h"
     35 #endif
     36 
     37 #include "speex/speex_resampler.h"
     38 #include <stdio.h>
     39 #include <math.h>
     40 #include <stdlib.h>
     41 
     42 #define NN 256
     43 
     44 int main()
     45 {
     46    spx_uint32_t i;
     47    short *in;
     48    short *out;
     49    float *fin, *fout;
     50    int count = 0;
     51    SpeexResamplerState *st = speex_resampler_init(1, 8000, 12000, 10, NULL);
     52    speex_resampler_set_rate(st, 96000, 44100);
     53    speex_resampler_skip_zeros(st);
     54 
     55    in = malloc(NN*sizeof(short));
     56    out = malloc(2*NN*sizeof(short));
     57    fin = malloc(NN*sizeof(float));
     58    fout = malloc(2*NN*sizeof(float));
     59    while (1)
     60    {
     61       spx_uint32_t in_len;
     62       spx_uint32_t out_len;
     63       fread(in, sizeof(short), NN, stdin);
     64       if (feof(stdin))
     65          break;
     66       for (i=0;i<NN;i++)
     67          fin[i]=in[i];
     68       in_len = NN;
     69       out_len = 2*NN;
     70       /*if (count==2)
     71          speex_resampler_set_quality(st, 10);*/
     72       speex_resampler_process_float(st, 0, fin, &in_len, fout, &out_len);
     73       for (i=0;i<out_len;i++)
     74          out[i]=floor(.5+fout[i]);
     75       /*speex_warning_int("writing", out_len);*/
     76       fwrite(out, sizeof(short), out_len, stdout);
     77       count++;
     78    }
     79    speex_resampler_destroy(st);
     80    free(in);
     81    free(out);
     82    free(fin);
     83    free(fout);
     84    return 0;
     85 }
     86 
     87