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