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Diffstat (limited to 'libspeexdsp/testresample2.c')
-rw-r--r-- | libspeexdsp/testresample2.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libspeexdsp/testresample2.c b/libspeexdsp/testresample2.c new file mode 100644 index 0000000..99a830d --- /dev/null +++ b/libspeexdsp/testresample2.c @@ -0,0 +1,93 @@ +/* Copyright (C) 2007 Jean-Marc Valin + + File: testresample2.c + Testing the resampling code + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + 3. The name of the author may not be used to endorse or promote products + derived from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "speex/speex_resampler.h" +#include <stdio.h> +#include <math.h> +#include <stdlib.h> + +#define PERIOD 32 +#define INBLOCK 1024 +#define RATE 48000 + +int main() +{ + spx_uint32_t i; + float *fin, *fout; + int rate = 1000, off = 0, avail = INBLOCK; + SpeexResamplerState *st = speex_resampler_init(1, RATE, RATE, 4, NULL); + speex_resampler_set_rate(st, RATE, rate); + speex_resampler_skip_zeros(st); + + fin = malloc(INBLOCK*2*sizeof(float)); + for (i=0; i<INBLOCK*2;i++) + fin[i] = sinf ((float)i/PERIOD * 2 * M_PI) * 0.9; + + fout = malloc(INBLOCK*4*sizeof(float)); + + while (1) + { + spx_uint32_t in_len; + spx_uint32_t out_len; + + in_len = avail; + out_len = (in_len * rate + RATE-1) / RATE; + + fprintf (stderr, "%d %d %d %d -> ", rate, off, in_len, out_len); + + speex_resampler_process_float(st, 0, fin + off, &in_len, fout, &out_len); + + fprintf (stderr, "%d %d\n", in_len, out_len); + off += in_len; + avail = avail - in_len + INBLOCK; + + if (off >= INBLOCK) + off -= INBLOCK; + + fwrite(fout, sizeof(float), out_len, stdout); + + rate += 100; + if (rate > 128000) + break; + + speex_resampler_set_rate(st, RATE, rate); + } + speex_resampler_destroy(st); + free(fin); + free(fout); + return 0; +} + |