86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* Copyright (c) 2008-2011 Xiph.Org Foundation
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Written by Jean-Marc Valin */
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/*
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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
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- 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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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE 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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#ifndef CUSTOM_MODES
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#define CUSTOM_MODES
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include "vq.h"
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#include "bands.h"
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#include "stack_alloc.h"
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#include <math.h>
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#define MAX_SIZE 100
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int ret=0;
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void test_rotation(int N, int K)
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{
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int i;
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double err = 0, ener = 0, snr, snr0;
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opus_val16 x0[MAX_SIZE];
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opus_val16 x1[MAX_SIZE];
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for (i=0;i<N;i++)
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x1[i] = x0[i] = rand()%32767-16384;
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exp_rotation(x1, N, 1, 1, K, SPREAD_NORMAL);
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for (i=0;i<N;i++)
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{
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err += (x0[i]-(double)x1[i])*(x0[i]-(double)x1[i]);
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ener += x0[i]*(double)x0[i];
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}
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snr0 = 20*log10(ener/err);
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err = ener = 0;
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exp_rotation(x1, N, -1, 1, K, SPREAD_NORMAL);
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for (i=0;i<N;i++)
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{
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err += (x0[i]-(double)x1[i])*(x0[i]-(double)x1[i]);
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ener += x0[i]*(double)x0[i];
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}
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snr = 20*log10(ener/err);
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printf ("SNR for size %d (%d pulses) is %f (was %f without inverse)\n", N, K, snr, snr0);
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if (snr < 60 || snr0 > 20)
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{
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fprintf(stderr, "FAIL!\n");
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ret = 1;
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}
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}
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int main(void)
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{
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ALLOC_STACK;
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test_rotation(15, 3);
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test_rotation(23, 5);
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test_rotation(50, 3);
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test_rotation(80, 1);
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return ret;
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}
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