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ae7fb01363
Original commit message from CVS: * gst/gstvalue.c: (gst_greatest_common_divisor): use ints and return ints, fractions only use ints, too, so this avoids accidently casting multiplications to unsigned (gst_value_lcopy_fraction): it's ints, not uint32 (gst_value_set_fraction): disallow minint, multiplying and negation are broken with it (gst_value_fraction_multiply): fix to make large numbers work and get rid of the assumption that the multiplication of two ints fits an int64 - dunno if that's true for all systems * testsuite/caps/Makefile.am: * testsuite/caps/fraction-multiply-and-zero.c: (check_multiplication), (check_equal), (zero_test), (main): add tests for all the stuff above * testsuite/caps/value_compare.c: (test1): fix comment * tests/.cvsignore: * testsuite/caps/.cvsignore: * testsuite/debug/.cvsignore: * testsuite/dlopen/.cvsignore: * testsuite/states/.cvsignore: get up to date
131 lines
4 KiB
C
131 lines
4 KiB
C
/* GStreamer
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*
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* fraction.c: test for all GstFraction operations
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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 <gst/gst.h>
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#include <glib.h>
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static void
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check_multiplication (int num1, int den1, int num2, int den2, int num_result,
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int den_result)
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{
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GValue value1 = { 0 };
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GValue value2 = { 0 };
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GValue value3 = { 0 };
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g_value_init (&value1, GST_TYPE_FRACTION);
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g_value_init (&value2, GST_TYPE_FRACTION);
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g_value_init (&value3, GST_TYPE_FRACTION);
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gst_value_set_fraction (&value1, num1, den1);
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gst_value_set_fraction (&value2, num2, den2);
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g_print ("%d/%d * %d/%d = ", num1, den1, num2, den2);
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gst_value_fraction_multiply (&value3, &value1, &value2);
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g_print ("%d/%d (should be %d/%d)\n",
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gst_value_get_fraction_numerator (&value3),
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gst_value_get_fraction_denominator (&value3), num_result, den_result);
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g_assert (gst_value_get_fraction_numerator (&value3) == num_result);
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g_assert (gst_value_get_fraction_denominator (&value3) == den_result);
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g_value_unset (&value1);
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g_value_unset (&value2);
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g_value_unset (&value3);
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}
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static void
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check_equal (int num1, int den1, int num2, int den2)
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{
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GValue value1 = { 0 };
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GValue value2 = { 0 };
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g_value_init (&value1, GST_TYPE_FRACTION);
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g_value_init (&value2, GST_TYPE_FRACTION);
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gst_value_set_fraction (&value1, num1, den1);
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gst_value_set_fraction (&value2, num2, den2);
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g_print ("%d/%d == %d/%d ? ", num1, den1, num2, den2);
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g_assert (gst_value_compare (&value1, &value2) == GST_VALUE_EQUAL);
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g_print ("yes\n");
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g_value_unset (&value1);
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g_value_unset (&value2);
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}
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static void
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zero_test (void)
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{
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GValue value1 = { 0 };
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g_value_init (&value1, GST_TYPE_FRACTION);
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/* fractions are initialized at 0 */
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g_assert (gst_value_get_fraction_numerator (&value1) == 0);
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g_assert (gst_value_get_fraction_denominator (&value1) == 1);
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/* every zero value is set to 0/1 */
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gst_value_set_fraction (&value1, 0, 235);
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g_assert (gst_value_get_fraction_numerator (&value1) == 0);
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g_assert (gst_value_get_fraction_denominator (&value1) == 1);
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gst_value_set_fraction (&value1, 0, -G_MAXINT);
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g_assert (gst_value_get_fraction_numerator (&value1) == 0);
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g_assert (gst_value_get_fraction_denominator (&value1) == 1);
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g_value_unset (&value1);
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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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GValue value1 = { 0 };
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GValue value2 = { 0 };
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GValue value3 = { 0 };
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gst_init (&argc, &argv);
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g_value_init (&value1, GST_TYPE_FRACTION);
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g_value_init (&value2, GST_TYPE_FRACTION);
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g_value_init (&value3, GST_TYPE_FRACTION);
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/*** zeroes ***/
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/* basic zero tests */
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zero_test ();
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/* check all zeroes are zeroes */
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check_equal (0, 1, 0, 12345);
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check_equal (0, 1, 0, -1);
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/* check multiplying with zeroes results in zeroes */
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check_multiplication (0, 1, 17, 18, 0, 1);
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check_multiplication (0, -13, -G_MAXINT, 2736, 0, 1);
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/*** large numbers ***/
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/* check multiplying large numbers works */
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check_multiplication (G_MAXINT, 1, G_MAXINT - 1, G_MAXINT, G_MAXINT - 1, 1);
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check_multiplication (-G_MAXINT, 1, -G_MAXINT + 1, -G_MAXINT, -G_MAXINT + 1,
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1);
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check_multiplication (G_MAXINT / 28, 459, -28, -G_MAXINT / 459,
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G_MAXINT / 28 * 28, G_MAXINT / 459 * 459);
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check_multiplication (3117 * 13, -17, 3117 * 17, 13, -3117 * 3117, 1);
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return 0;
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}
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