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3fb41e2cc3
Add a small example that uses ffts of various types and parameters and check the result value ranges.
184 lines
8.9 KiB
C
184 lines
8.9 KiB
C
/* GStreamer
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* (c) 2011 Stefan Kost <ensonic@users.sf.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <gst/fft/gstffts16.h>
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#include <gst/fft/gstffts32.h>
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#include <gst/fft/gstfftf32.h>
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#include <gst/fft/gstfftf64.h>
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/* effectively max range seems to be 1/4 of what it should be */
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#define MAKE_I_TEST(_g_,_G_,_t_,_T_,_f_) \
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static void \
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test_##_t_ (const gchar *test_name, gint num_freq, gint window) \
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{ \
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GstFFT ##_T_ *ctx; \
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GstFFT ##_T_ ##Complex *fdata; \
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_g_ *adata; \
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_g_ maxfr = 0, maxfi = 0; \
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gint num_samples = num_freq * 2 - 2; \
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gint s, f; \
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\
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ctx = gst_fft_ ##_t_ ##_new (num_samples, FALSE); \
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fdata = g_new (GstFFT ##_T_ ##Complex, num_freq); \
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adata = g_new (_g_, num_samples); \
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\
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for (s = 0; s < num_samples;) { \
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adata[s++]=G_MIN##_G_; \
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adata[s++]=G_MAX##_G_; \
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} \
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\
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gst_fft_ ##_t_ ##_window (ctx, adata, window); \
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gst_fft_ ##_t_ ##_fft (ctx, adata, fdata); \
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\
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for (f = 0; f < num_freq; f++) { \
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if (fdata[1+f].r > maxfr) \
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maxfr = fdata[1+f].r; \
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if (fdata[1+f].i > maxfi) \
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maxfi = fdata[1+f].i; \
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} \
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\
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printf (#_t_" %-15s: maxfr: %"_f_" %10.5f maxfi: %"_f_" %10.5f\n",\
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test_name, \
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maxfr, (gfloat)G_MAX##_G_/maxfr, \
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maxfi, (gfloat)G_MAX##_G_/maxfi); \
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\
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gst_fft_ ##_t_ ##_free (ctx); \
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g_free (fdata); \
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g_free (adata); \
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}
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MAKE_I_TEST (gint16, INT16, s16, S16, "6d");
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MAKE_I_TEST (gint32, INT32, s32, S32, "9d");
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#define MAKE_F_TEST(_g_,_G_,_t_,_T_,_f_) \
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static void \
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test_##_t_ (const gchar *test_name, gint num_freq, gint window) \
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{ \
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GstFFT ##_T_ *ctx; \
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GstFFT ##_T_ ##Complex *fdata; \
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_g_ *adata; \
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_g_ maxfr = 0, maxfi = 0; \
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gint num_samples = num_freq * 2 - 2; \
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gint s, f; \
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\
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ctx = gst_fft_ ##_t_ ##_new (num_samples, FALSE); \
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fdata = g_new (GstFFT ##_T_ ##Complex, num_freq); \
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adata = g_new (_g_, num_samples); \
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\
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for (s = 0; s < num_samples;) { \
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adata[s++]=-1.0; \
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adata[s++]=+1.0; \
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} \
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\
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gst_fft_ ##_t_ ##_window (ctx, adata, window); \
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gst_fft_ ##_t_ ##_fft (ctx, adata, fdata); \
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\
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for (f = 0; f < num_freq; f++) { \
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if (fdata[1+f].r > maxfr) \
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maxfr = fdata[1+f].r; \
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if (fdata[1+f].i > maxfi) \
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maxfi = fdata[1+f].i; \
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} \
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\
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printf (#_t_" %-15s: maxfr: %"_f_" %10.5f maxfi: %"_f_" %10.5f\n",\
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test_name, \
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maxfr, (gfloat)1.0/maxfr, \
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maxfi, (gfloat)1.0/maxfi); \
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\
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gst_fft_ ##_t_ ##_free (ctx); \
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g_free (fdata); \
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g_free (adata); \
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}
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MAKE_F_TEST (gfloat, FLOAT, f32, F32, "10.5f");
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MAKE_F_TEST (gdouble, DOUBLE, f64, F64, "10.5f");
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gint
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main (gint argc, gchar * argv[])
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{
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gint num_bands;
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gst_init (&argc, &argv);
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num_bands = 200;
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test_s16 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_s16 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_s16 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_s16 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_s16 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("");
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num_bands = 300;
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test_s16 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_s16 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_s16 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_s16 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_s16 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("\n");
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num_bands = 200;
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test_s32 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_s32 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_s32 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_s32 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_s32 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("");
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num_bands = 300;
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test_s32 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_s32 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_s32 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_s32 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_s32 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("\n");
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num_bands = 200;
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test_f32 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_f32 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_f32 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_f32 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_f32 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("");
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num_bands = 300;
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test_f32 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_f32 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_f32 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_f32 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_f32 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("\n");
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num_bands = 200;
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test_f64 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_f64 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_f64 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_f64 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_f64 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("");
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num_bands = 300;
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test_f64 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
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test_f64 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
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test_f64 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
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test_f64 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
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test_f64 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
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puts ("\n");
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}
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