94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
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/* Copyright (C) 2007 Jean-Marc Valin
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File: testresample2.c
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Testing the resampling code
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "speex/speex_resampler.h"
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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#define PERIOD 32
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#define INBLOCK 1024
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#define RATE 48000
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int main()
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{
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spx_uint32_t i;
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float *fin, *fout;
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int rate = 1000, off = 0, avail = INBLOCK;
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SpeexResamplerState *st = speex_resampler_init(1, RATE, RATE, 4, NULL);
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speex_resampler_set_rate(st, RATE, rate);
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speex_resampler_skip_zeros(st);
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fin = malloc(INBLOCK*2*sizeof(float));
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for (i=0; i<INBLOCK*2;i++)
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fin[i] = sinf ((float)i/PERIOD * 2 * M_PI) * 0.9;
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fout = malloc(INBLOCK*4*sizeof(float));
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while (1)
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{
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spx_uint32_t in_len;
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spx_uint32_t out_len;
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in_len = avail;
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out_len = (in_len * rate + RATE-1) / RATE;
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fprintf (stderr, "%d %d %d %d -> ", rate, off, in_len, out_len);
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speex_resampler_process_float(st, 0, fin + off, &in_len, fout, &out_len);
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fprintf (stderr, "%d %d\n", in_len, out_len);
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off += in_len;
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avail = avail - in_len + INBLOCK;
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if (off >= INBLOCK)
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off -= INBLOCK;
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fwrite(fout, sizeof(float), out_len, stdout);
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rate += 100;
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if (rate > 128000)
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break;
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speex_resampler_set_rate(st, RATE, rate);
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}
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speex_resampler_destroy(st);
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free(fin);
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free(fout);
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return 0;
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}
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