| /* 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; |
| } |
| |