gstreamer/tests/old/testsuite/caps/fraction-multiply-and-zero.c

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/* GStreamer
*
* fraction.c: test for all GstFraction operations
*
* 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 <gst/gst.h>
#include <glib.h>
static void
check_multiplication (int num1, int den1, int num2, int den2, int num_result,
int den_result)
{
GValue value1 = { 0 };
GValue value2 = { 0 };
GValue value3 = { 0 };
g_value_init (&value1, GST_TYPE_FRACTION);
g_value_init (&value2, GST_TYPE_FRACTION);
g_value_init (&value3, GST_TYPE_FRACTION);
gst_value_set_fraction (&value1, num1, den1);
gst_value_set_fraction (&value2, num2, den2);
g_print ("%d/%d * %d/%d = ", num1, den1, num2, den2);
gst_value_fraction_multiply (&value3, &value1, &value2);
g_print ("%d/%d (should be %d/%d)\n",
gst_value_get_fraction_numerator (&value3),
gst_value_get_fraction_denominator (&value3), num_result, den_result);
g_assert (gst_value_get_fraction_numerator (&value3) == num_result);
g_assert (gst_value_get_fraction_denominator (&value3) == den_result);
g_value_unset (&value1);
g_value_unset (&value2);
g_value_unset (&value3);
}
static void
check_equal (int num1, int den1, int num2, int den2)
{
GValue value1 = { 0 };
GValue value2 = { 0 };
g_value_init (&value1, GST_TYPE_FRACTION);
g_value_init (&value2, GST_TYPE_FRACTION);
gst_value_set_fraction (&value1, num1, den1);
gst_value_set_fraction (&value2, num2, den2);
g_print ("%d/%d == %d/%d ? ", num1, den1, num2, den2);
g_assert (gst_value_compare (&value1, &value2) == GST_VALUE_EQUAL);
g_print ("yes\n");
g_value_unset (&value1);
g_value_unset (&value2);
}
static void
zero_test (void)
{
GValue value1 = { 0 };
g_value_init (&value1, GST_TYPE_FRACTION);
/* fractions are initialized at 0 */
g_assert (gst_value_get_fraction_numerator (&value1) == 0);
g_assert (gst_value_get_fraction_denominator (&value1) == 1);
/* every zero value is set to 0/1 */
gst_value_set_fraction (&value1, 0, 235);
g_assert (gst_value_get_fraction_numerator (&value1) == 0);
g_assert (gst_value_get_fraction_denominator (&value1) == 1);
gst_value_set_fraction (&value1, 0, -G_MAXINT);
g_assert (gst_value_get_fraction_numerator (&value1) == 0);
g_assert (gst_value_get_fraction_denominator (&value1) == 1);
g_value_unset (&value1);
}
int
main (int argc, char *argv[])
{
GValue value1 = { 0 };
GValue value2 = { 0 };
GValue value3 = { 0 };
gst_init (&argc, &argv);
g_value_init (&value1, GST_TYPE_FRACTION);
g_value_init (&value2, GST_TYPE_FRACTION);
g_value_init (&value3, GST_TYPE_FRACTION);
/*** zeroes ***/
/* basic zero tests */
zero_test ();
/* check all zeroes are zeroes */
check_equal (0, 1, 0, 12345);
check_equal (0, 1, 0, -1);
/* check multiplying with zeroes results in zeroes */
check_multiplication (0, 1, 17, 18, 0, 1);
check_multiplication (0, -13, -G_MAXINT, 2736, 0, 1);
/*** large numbers ***/
/* check multiplying large numbers works */
check_multiplication (G_MAXINT, 1, G_MAXINT - 1, G_MAXINT, G_MAXINT - 1, 1);
check_multiplication (-G_MAXINT, 1, -G_MAXINT + 1, -G_MAXINT, -G_MAXINT + 1,
1);
check_multiplication (G_MAXINT / 28, 459, -28, -G_MAXINT / 459,
G_MAXINT / 28 * 28, G_MAXINT / 459 * 459);
check_multiplication (3117 * 13, -17, 3117 * 17, 13, -3117 * 3117, 1);
return 0;
}