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- #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;
- }
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