mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 17:09:48 +00:00
139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/* GStreamer
|
|
*
|
|
* fraction-convert.c: test for GstFraction transform
|
|
*
|
|
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
|
|
*
|
|
* 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
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <gst/gst.h>
|
|
#include <glib.h>
|
|
|
|
static void
|
|
check_from_double_convert (gdouble value, gint num, gint denom, gdouble prec)
|
|
{
|
|
GValue value1 = { 0 };
|
|
GValue value2 = { 0 };
|
|
gdouble check;
|
|
gint res_num, res_denom;
|
|
|
|
g_value_init (&value1, G_TYPE_DOUBLE);
|
|
g_value_init (&value2, GST_TYPE_FRACTION);
|
|
|
|
g_value_set_double (&value1, value);
|
|
g_value_transform (&value1, &value2);
|
|
g_print ("%s = %s ? (expected: %d/%d )\n",
|
|
gst_value_serialize (&value1), gst_value_serialize (&value2), num, denom);
|
|
|
|
res_num = gst_value_get_fraction_numerator (&value2);
|
|
res_denom = gst_value_get_fraction_denominator (&value2);
|
|
if (res_num == num && res_denom == denom) {
|
|
g_print ("best conversion.\n");
|
|
} else {
|
|
if (fabs (value - res_num / (gdouble) res_denom) <= prec) {
|
|
g_print ("acceptable suboptimal conversion.\n");
|
|
} else {
|
|
g_print ("unacceptable suboptimal conversion.\n");
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
g_value_transform (&value2, &value1);
|
|
g_print ("%s = %s\n",
|
|
gst_value_serialize (&value2), gst_value_serialize (&value1));
|
|
check = g_value_get_double (&value1);
|
|
g_assert (fabs (value - check) <= prec);
|
|
}
|
|
|
|
static void
|
|
check_from_fraction_convert (gint num, gint denom, gdouble prec)
|
|
{
|
|
GValue value1 = { 0 };
|
|
GValue value2 = { 0 };
|
|
gdouble value;
|
|
gint res_num, res_denom;
|
|
|
|
g_value_init (&value1, GST_TYPE_FRACTION);
|
|
g_value_init (&value2, G_TYPE_DOUBLE);
|
|
|
|
gst_value_set_fraction (&value1, num, denom);
|
|
g_value_transform (&value1, &value2);
|
|
|
|
value = g_value_get_double (&value2);
|
|
g_assert (fabs (value - ((gdouble) num) / denom) < prec);
|
|
|
|
g_print ("%s = %s, %2.50lf as double\n",
|
|
gst_value_serialize (&value1), gst_value_serialize (&value2), value);
|
|
|
|
g_value_transform (&value2, &value1);
|
|
g_print ("%s = %s ? (expected: %d/%d )\n",
|
|
gst_value_serialize (&value2), gst_value_serialize (&value1), num, denom);
|
|
value = g_value_get_double (&value2);
|
|
|
|
res_num = gst_value_get_fraction_numerator (&value1);
|
|
res_denom = gst_value_get_fraction_denominator (&value1);
|
|
if (res_num == num && res_denom == denom) {
|
|
g_print ("best conversion.\n");
|
|
} else {
|
|
if (fabs (value - res_num / (gdouble) res_denom) <= prec) {
|
|
g_print ("acceptable suboptimal conversion.\n");
|
|
} else {
|
|
g_print ("unacceptable suboptimal conversion.\n");
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
g_value_unset (&value2);
|
|
g_value_unset (&value1);
|
|
}
|
|
|
|
static void
|
|
transform_test (void)
|
|
{
|
|
check_from_fraction_convert (30000, 1001, 1.0e-9);
|
|
check_from_fraction_convert (1, G_MAXINT, 1.0e-9);
|
|
check_from_fraction_convert (G_MAXINT, 1, 1.0e-9);
|
|
|
|
check_from_double_convert (0.0, 0, 1, 1.0e-9);
|
|
check_from_double_convert (1.0, 1, 1, 1.0e-9);
|
|
check_from_double_convert (-1.0, -1, 1, 1.0e-9);
|
|
check_from_double_convert (M_PI, 1881244168, 598818617, 1.0e-9);
|
|
check_from_double_convert (-M_PI, -1881244168, 598818617, 1.0e-9);
|
|
|
|
check_from_double_convert (G_MAXDOUBLE, G_MAXINT, 1, G_MAXDOUBLE);
|
|
check_from_double_convert (G_MINDOUBLE, 0, 1, G_MAXDOUBLE);
|
|
check_from_double_convert (-G_MAXDOUBLE, -G_MAXINT, 1, G_MAXDOUBLE);
|
|
check_from_double_convert (-G_MINDOUBLE, 0, 1, G_MAXDOUBLE);
|
|
|
|
check_from_double_convert (((gdouble) G_MAXINT) + 1, G_MAXINT, 1,
|
|
G_MAXDOUBLE);
|
|
check_from_double_convert (((gdouble) G_MININT) - 1, G_MININT + 1, 1,
|
|
G_MAXDOUBLE);
|
|
|
|
check_from_double_convert (G_MAXINT - 1, G_MAXINT - 1, 1, 0);
|
|
check_from_double_convert (G_MININT + 1, G_MININT + 1, 1, 0);
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
gst_init (&argc, &argv);
|
|
|
|
transform_test ();
|
|
|
|
return 0;
|
|
}
|