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gstreamer/subprojects/gst-plugins-base/tests/examples/fft/fftrange.c

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tests: add a test for fft result value-ranges Add a small example that uses ffts of various types and parameters and check the result value ranges.
2011-12-02 22:34:47 +00:00
/* GStreamer
* (c) 2011 Stefan Kost <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
Fix FSF address https://bugzilla.gnome.org/show_bug.cgi?id=687520
2012-11-03 23:05:09 +00:00
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
tests: add a test for fft result value-ranges Add a small example that uses ffts of various types and parameters and check the result value ranges.
2011-12-02 22:34:47 +00:00
*/
#include <stdio.h>
#include <gst/fft/gstffts16.h>
#include <gst/fft/gstffts32.h>
#include <gst/fft/gstfftf32.h>
#include <gst/fft/gstfftf64.h>
/* effectively max range seems to be 1/4 of what it should be */
#define MAKE_I_TEST(_g_,_G_,_t_,_T_,_f_) \
static void \
test_##_t_ (const gchar *test_name, gint num_freq, gint window) \
{ \
GstFFT ##_T_ *ctx; \
GstFFT ##_T_ ##Complex *fdata; \
_g_ *adata; \
_g_ maxfr = 0, maxfi = 0; \
gint num_samples = num_freq * 2 - 2; \
gint s, f; \
\
ctx = gst_fft_ ##_t_ ##_new (num_samples, FALSE); \
fdata = g_new (GstFFT ##_T_ ##Complex, num_freq); \
adata = g_new (_g_, num_samples); \
\
for (s = 0; s < num_samples;) { \
adata[s++]=G_MIN##_G_; \
adata[s++]=G_MAX##_G_; \
} \
\
gst_fft_ ##_t_ ##_window (ctx, adata, window); \
gst_fft_ ##_t_ ##_fft (ctx, adata, fdata); \
\
for (f = 0; f < num_freq; f++) { \
if (fdata[1+f].r > maxfr) \
maxfr = fdata[1+f].r; \
if (fdata[1+f].i > maxfi) \
maxfi = fdata[1+f].i; \
} \
\
printf (#_t_" %-15s: maxfr: %"_f_" %10.5f maxfi: %"_f_" %10.5f\n",\
test_name, \
maxfr, (gfloat)G_MAX##_G_/maxfr, \
maxfi, (gfloat)G_MAX##_G_/maxfi); \
\
gst_fft_ ##_t_ ##_free (ctx); \
g_free (fdata); \
g_free (adata); \
}
MAKE_I_TEST (gint16, INT16, s16, S16, "6d");
MAKE_I_TEST (gint32, INT32, s32, S32, "9d");
#define MAKE_F_TEST(_g_,_G_,_t_,_T_,_f_) \
static void \
test_##_t_ (const gchar *test_name, gint num_freq, gint window) \
{ \
GstFFT ##_T_ *ctx; \
GstFFT ##_T_ ##Complex *fdata; \
_g_ *adata; \
_g_ maxfr = 0, maxfi = 0; \
gint num_samples = num_freq * 2 - 2; \
gint s, f; \
\
ctx = gst_fft_ ##_t_ ##_new (num_samples, FALSE); \
fdata = g_new (GstFFT ##_T_ ##Complex, num_freq); \
adata = g_new (_g_, num_samples); \
\
for (s = 0; s < num_samples;) { \
adata[s++]=-1.0; \
adata[s++]=+1.0; \
} \
\
gst_fft_ ##_t_ ##_window (ctx, adata, window); \
gst_fft_ ##_t_ ##_fft (ctx, adata, fdata); \
\
for (f = 0; f < num_freq; f++) { \
if (fdata[1+f].r > maxfr) \
maxfr = fdata[1+f].r; \
if (fdata[1+f].i > maxfi) \
maxfi = fdata[1+f].i; \
} \
\
printf (#_t_" %-15s: maxfr: %"_f_" %10.5f maxfi: %"_f_" %10.5f\n",\
test_name, \
maxfr, (gfloat)1.0/maxfr, \
maxfi, (gfloat)1.0/maxfi); \
\
gst_fft_ ##_t_ ##_free (ctx); \
g_free (fdata); \
g_free (adata); \
}
MAKE_F_TEST (gfloat, FLOAT, f32, F32, "10.5f");
MAKE_F_TEST (gdouble, DOUBLE, f64, F64, "10.5f");
gint
main (gint argc, gchar * argv[])
{
gint num_bands;
gst_init (&argc, &argv);
num_bands = 200;
test_s16 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_s16 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_s16 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
test_s16 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_s16 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("");
num_bands = 300;
test_s16 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_s16 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_s16 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
test_s16 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_s16 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("\n");
num_bands = 200;
test_s32 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_s32 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_s32 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
test_s32 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_s32 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("");
num_bands = 300;
test_s32 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_s32 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_s32 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
test_s32 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_s32 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("\n");
num_bands = 200;
test_f32 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_f32 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_f32 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
test_f32 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_f32 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("");
num_bands = 300;
test_f32 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_f32 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_f32 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
test_f32 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_f32 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("\n");
num_bands = 200;
test_f64 ("200, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_f64 ("200, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_f64 ("200, hann", num_bands, GST_FFT_WINDOW_HANN);
test_f64 ("200, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_f64 ("200, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("");
num_bands = 300;
test_f64 ("300, none", num_bands, GST_FFT_WINDOW_RECTANGULAR);
test_f64 ("300, hamming", num_bands, GST_FFT_WINDOW_HAMMING);
test_f64 ("300, hann", num_bands, GST_FFT_WINDOW_HANN);
test_f64 ("300, bartlett", num_bands, GST_FFT_WINDOW_BARTLETT);
test_f64 ("300, blackman", num_bands, GST_FFT_WINDOW_BLACKMAN);
puts ("\n");
fix compiler warning
2012-06-20 08:52:34 +00:00
return 0;
tests: add a test for fft result value-ranges Add a small example that uses ffts of various types and parameters and check the result value ranges.
2011-12-02 22:34:47 +00:00
}
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