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1 /* Copyright (c) 2008-2011 Xiph.Org Foundation
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2 Written by Jean-Marc Valin */
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3 /*
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4 Redistribution and use in source and binary forms, with or without
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5 modification, are permitted provided that the following conditions
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6 are met:
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7
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8 - Redistributions of source code must retain the above copyright
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9 notice, this list of conditions and the following disclaimer.
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10
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11 - Redistributions in binary form must reproduce the above copyright
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12 notice, this list of conditions and the following disclaimer in the
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13 documentation and/or other materials provided with the distribution.
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14
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15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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26 */
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27
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28 #ifdef HAVE_CONFIG_H
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29 #include "config.h"
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30 #endif
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31
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32 #ifndef CUSTOM_MODES
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33 #define CUSTOM_MODES
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34 #endif
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35
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36 #include <stdio.h>
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37 #include <stdlib.h>
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38 #include "vq.h"
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39 #include "bands.h"
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40 #include "stack_alloc.h"
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41 #include <math.h>
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42
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43
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44 #define MAX_SIZE 100
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45
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46 int ret=0;
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47 void test_rotation(int N, int K)
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48 {
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49 int i;
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50 double err = 0, ener = 0, snr, snr0;
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51 opus_val16 x0[MAX_SIZE];
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52 opus_val16 x1[MAX_SIZE];
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53 for (i=0;i<N;i++)
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54 x1[i] = x0[i] = rand()%32767-16384;
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55 exp_rotation(x1, N, 1, 1, K, SPREAD_NORMAL);
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56 for (i=0;i<N;i++)
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57 {
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58 err += (x0[i]-(double)x1[i])*(x0[i]-(double)x1[i]);
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59 ener += x0[i]*(double)x0[i];
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60 }
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61 snr0 = 20*log10(ener/err);
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62 err = ener = 0;
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63 exp_rotation(x1, N, -1, 1, K, SPREAD_NORMAL);
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64 for (i=0;i<N;i++)
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65 {
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66 err += (x0[i]-(double)x1[i])*(x0[i]-(double)x1[i]);
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67 ener += x0[i]*(double)x0[i];
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68 }
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69 snr = 20*log10(ener/err);
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70 printf ("SNR for size %d (%d pulses) is %f (was %f without inverse)\n", N, K, snr, snr0);
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71 if (snr < 60 || snr0 > 20)
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72 {
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73 fprintf(stderr, "FAIL!\n");
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74 ret = 1;
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75 }
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76 }
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77
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78 int main(void)
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79 {
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80 ALLOC_STACK;
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81 test_rotation(15, 3);
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82 test_rotation(23, 5);
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83 test_rotation(50, 3);
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84 test_rotation(80, 1);
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85 return ret;
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86 }
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