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gst/gststructure.c: Fix fraction list fixation code. Take the fraction with the smallest difference with the target i...

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Original commit message from CVS:
* gst/gststructure.c:
(gst_structure_fixate_field_nearest_fraction):
Fix fraction list fixation code. Take the fraction with the smallest
difference with the target instead of the first one in the list.
* tests/check/gst/gststructure.c: (GST_START_TEST),
(gst_structure_suite):
Added test to verify correct fraction list fixation behaviour.
This commit is contained in:
Wim Taymans 2007-09-05 01:00:50 +00:00
parent b4136f995e
commit a0274c10a7
3 changed files with 62 additions and 13 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2007-09-04 Wim Taymans <wim.taymans@gmail.com>
* gst/gststructure.c:
(gst_structure_fixate_field_nearest_fraction):
Fix fraction list fixation code. Take the fraction with the smallest
difference with the target instead of the first one in the list.
* tests/check/gst/gststructure.c: (GST_START_TEST),
(gst_structure_suite):
Added test to verify correct fraction list fixation behaviour.
2007-09-02 Tim-Philipp Müller <tim at centricular dot net>
* win32/common/libgstreamer.def:

25
gst/gststructure.c
View file

@ -2167,23 +2167,23 @@ gst_structure_fixate_field_nearest_fraction (GstStructure * structure,
gst_value_set_fraction (&target, target_numerator, target_denominator);
best = NULL;
n = gst_value_list_get_size (value);
for (i = 0; i < n; i++) {
list_value = gst_value_list_get_value (value, i);
if (G_VALUE_TYPE (list_value) == GST_TYPE_FRACTION) {
if (best == NULL) {
best = list_value;
gst_value_set_fraction (&best_diff, 0, 1);
} else {
if (gst_value_compare (list_value, &target) == GST_VALUE_LESS_THAN)
gst_value_fraction_subtract (&cur_diff, &target, list_value);
else
gst_value_fraction_subtract (&cur_diff, list_value, &target);
if (gst_value_compare (&cur_diff, &best_diff) == GST_VALUE_LESS_THAN) {
best = list_value;
g_value_copy (&cur_diff, &best_diff);
}
if (gst_value_compare (list_value, &target) == GST_VALUE_LESS_THAN)
gst_value_fraction_subtract (&cur_diff, &target, list_value);
else
gst_value_fraction_subtract (&cur_diff, list_value, &target);
if (!best
|| gst_value_compare (&cur_diff,
&best_diff) == GST_VALUE_LESS_THAN) {
best = list_value;
g_value_copy (&cur_diff, &best_diff);
}
}
}
@ -2196,6 +2196,5 @@ gst_structure_fixate_field_nearest_fraction (GstStructure * structure,
g_value_unset (&target);
return res;
}
return FALSE;
}

39
tests/check/gst/gststructure.c
View file

@ -204,6 +204,44 @@ GST_START_TEST (test_fixate)
GST_END_TEST;
GST_START_TEST (test_fixate_frac_list)
{
GstStructure *s;
GValue list = { 0 };
GValue frac = { 0 };
gchar *str;
gint num, denom;
g_value_init (&list, GST_TYPE_LIST);
g_value_init (&frac, GST_TYPE_FRACTION);
gst_value_set_fraction (&frac, 30, 1);
gst_value_list_append_value (&list, &frac);
gst_value_set_fraction (&frac, 15, 1);
gst_value_list_append_value (&list, &frac);
gst_value_set_fraction (&frac, 10, 1);
gst_value_list_append_value (&list, &frac);
s = gst_structure_new ("name", NULL);
gst_structure_set_value (s, "frac", &list);
g_value_unset (&frac);
g_value_unset (&list);
str = gst_structure_to_string (s);
GST_DEBUG ("list %s", str);
g_free (str);
/* fixate to the nearest fraction, this should give 15/1 */
fail_unless (gst_structure_fixate_field_nearest_fraction (s, "frac", 14, 1));
fail_unless (gst_structure_get_fraction (s, "frac", &num, &denom));
fail_unless (num == 15);
fail_unless (denom == 1);
gst_structure_free (s);
}
GST_END_TEST;
Suite *
gst_structure_suite (void)
@ -217,6 +255,7 @@ gst_structure_suite (void)
tcase_add_test (tc_chain, test_complete_structure);
tcase_add_test (tc_chain, test_structure_new);
tcase_add_test (tc_chain, test_fixate);
tcase_add_test (tc_chain, test_fixate_frac_list);
return s;
}