ref: 17d7fed1e044ea63af87873c62468de60a9b38ac
dir: /celt/tests/test_unit_mdct.c/
/* Copyright (c) 2008-2011 Xiph.Org Foundation Written by Jean-Marc Valin */ /* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - 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. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``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 COPYRIGHT OWNER OR CONTRIBUTORS 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 #define SKIP_CONFIG_H #ifndef CUSTOM_MODES #define CUSTOM_MODES #endif #include <stdio.h> #define CELT_C #include "mdct.h" #include "stack_alloc.h" #include "kiss_fft.c" #include "mdct.c" #include "mathops.c" #include "entcode.c" #ifndef M_PI #define M_PI 3.141592653 #endif int ret = 0; void check(kiss_fft_scalar * in,kiss_fft_scalar * out,int nfft,int isinverse) { int bin,k; double errpow=0,sigpow=0; double snr; for (bin=0;bin<nfft/2;++bin) { double ansr = 0; double difr; for (k=0;k<nfft;++k) { double phase = 2*M_PI*(k+.5+.25*nfft)*(bin+.5)/nfft; double re = cos(phase); re /= nfft/4; ansr += in[k] * re; } /*printf ("%f %f\n", ansr, out[bin]);*/ difr = ansr - out[bin]; errpow += difr*difr; sigpow += ansr*ansr; } snr = 10*log10(sigpow/errpow); printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr ); if (snr<60) { printf( "** poor snr: %f **\n", snr); ret = 1; } } void check_inv(kiss_fft_scalar * in,kiss_fft_scalar * out,int nfft,int isinverse) { int bin,k; double errpow=0,sigpow=0; double snr; for (bin=0;bin<nfft;++bin) { double ansr = 0; double difr; for (k=0;k<nfft/2;++k) { double phase = 2*M_PI*(bin+.5+.25*nfft)*(k+.5)/nfft; double re = cos(phase); /*re *= 2;*/ ansr += in[k] * re; } /*printf ("%f %f\n", ansr, out[bin]);*/ difr = ansr - out[bin]; errpow += difr*difr; sigpow += ansr*ansr; } snr = 10*log10(sigpow/errpow); printf("nfft=%d inverse=%d,snr = %f\n",nfft,isinverse,snr ); if (snr<60) { printf( "** poor snr: %f **\n", snr); ret = 1; } } void test1d(int nfft,int isinverse) { mdct_lookup cfg; size_t buflen = sizeof(kiss_fft_scalar)*nfft; kiss_fft_scalar * in = (kiss_fft_scalar*)malloc(buflen); kiss_fft_scalar * in_copy = (kiss_fft_scalar*)malloc(buflen); kiss_fft_scalar * out= (kiss_fft_scalar*)malloc(buflen); opus_val16 * window= (opus_val16*)malloc(sizeof(opus_val16)*nfft/2); int k; clt_mdct_init(&cfg, nfft, 0); for (k=0;k<nfft;++k) { in[k] = (rand() % 32768) - 16384; } for (k=0;k<nfft/2;++k) { window[k] = Q15ONE; } for (k=0;k<nfft;++k) { in[k] *= 32768; } if (isinverse) { for (k=0;k<nfft;++k) { in[k] /= nfft; } } for (k=0;k<nfft;++k) in_copy[k] = in[k]; /*for (k=0;k<nfft;++k) printf("%d %d ", in[k].r, in[k].i);printf("\n");*/ if (isinverse) { for (k=0;k<nfft;++k) out[k] = 0; clt_mdct_backward(&cfg,in,out, window, nfft/2, 0, 1); /* apply TDAC because clt_mdct_backward() no longer does that */ for (k=0;k<nfft/4;++k) out[nfft-k-1] = out[nfft/2+k]; check_inv(in,out,nfft,isinverse); } else { clt_mdct_forward(&cfg,in,out,window, nfft/2, 0, 1); check(in_copy,out,nfft,isinverse); } /*for (k=0;k<nfft;++k) printf("%d %d ", out[k].r, out[k].i);printf("\n");*/ free(in); free(out); clt_mdct_clear(&cfg); } int main(int argc,char ** argv) { ALLOC_STACK; if (argc>1) { int k; for (k=1;k<argc;++k) { test1d(atoi(argv[k]),0); test1d(atoi(argv[k]),1); } }else{ test1d(32,0); test1d(32,1); test1d(256,0); test1d(256,1); test1d(512,0); test1d(512,1); test1d(1024,0); test1d(1024,1); test1d(2048,0); test1d(2048,1); #ifndef RADIX_TWO_ONLY test1d(36,0); test1d(36,1); test1d(40,0); test1d(40,1); test1d(60,0); test1d(60,1); test1d(120,0); test1d(120,1); test1d(240,0); test1d(240,1); test1d(480,0); test1d(480,1); test1d(960,0); test1d(960,1); test1d(1920,0); test1d(1920,1); #endif } return ret; }