value: Lists with all equal elements are equal to a single value

Otherwise caps containing f={X, X} are not compatible with f=X

https://bugzilla.gnome.org/show_bug.cgi?id=709253

2 files changed, 55 insertions, 7 deletions

diff --git a/gst/gstvalue.c b/gst/gstvalue.c
index 9dadb85912..ad9b353cf6 100644
--- a/gst/gstvalue.c
+++ b/gst/gstvalue.c
@@ -4466,24 +4466,51 @@ gst_value_compare (const GValue * value1, const GValue * value2)
      as well as lists and ranges ("{ 1, 2 }" and "[ 1, 2 ]" are equal) */
   ltype = gst_value_list_get_type ();
   if (G_VALUE_HOLDS (value1, ltype) && !G_VALUE_HOLDS (value2, ltype)) {
+    gint i, n, ret;
 
     if (gst_value_list_equals_range (value1, value2)) {
       return GST_VALUE_EQUAL;
-    } else if (gst_value_list_get_size (value1) == 1) {
+    }
+
+    n = gst_value_list_get_size (value1);
+    if (n == 0)
+      return GST_VALUE_UNORDERED;
+
+    for (i = 0; i < n; i++) {
       const GValue *elt;
 
-      elt = gst_value_list_get_value (value1, 0);
-      return gst_value_compare (elt, value2);
+      elt = gst_value_list_get_value (value1, i);
+      ret = gst_value_compare (elt, value2);
+      if (ret != GST_VALUE_EQUAL && n == 1)
+        return ret;
+      else if (ret != GST_VALUE_EQUAL)
+        return GST_VALUE_UNORDERED;
     }
+
+    return GST_VALUE_EQUAL;
   } else if (G_VALUE_HOLDS (value2, ltype) && !G_VALUE_HOLDS (value1, ltype)) {
+    gint i, n, ret;
+
     if (gst_value_list_equals_range (value2, value1)) {
       return GST_VALUE_EQUAL;
-    } else if (gst_value_list_get_size (value2) == 1) {
+    }
+
+    n = gst_value_list_get_size (value2);
+    if (n == 0)
+      return GST_VALUE_UNORDERED;
+
+    for (i = 0; i < n; i++) {
       const GValue *elt;
 
-      elt = gst_value_list_get_value (value2, 0);
-      return gst_value_compare (elt, value1);
+      elt = gst_value_list_get_value (value2, i);
+      ret = gst_value_compare (elt, value1);
+      if (ret != GST_VALUE_EQUAL && n == 1)
+        return ret;
+      else if (ret != GST_VALUE_EQUAL)
+        return GST_VALUE_UNORDERED;
     }
+
+    return GST_VALUE_EQUAL;
   }
 
   if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
diff --git a/tests/check/gst/gstcaps.c b/tests/check/gst/gstcaps.c
index 0f1bcb2298..4d26462345 100644
--- a/tests/check/gst/gstcaps.c
+++ b/tests/check/gst/gstcaps.c
@@ -340,9 +340,30 @@ GST_START_TEST (test_subset_duplication)
   GstCaps *c1, *c2;
 
   c1 = gst_caps_from_string ("audio/x-raw, format=(string)F32LE");
+  c2 = gst_caps_from_string ("audio/x-raw, format=(string)F32LE");
+
+  fail_unless (gst_caps_is_subset (c1, c2));
+  fail_unless (gst_caps_is_subset (c2, c1));
+
+  gst_caps_unref (c2);
+  c2 = gst_caps_from_string ("audio/x-raw, format=(string){ F32LE }");
+
+  fail_unless (gst_caps_is_subset (c1, c2));
+  fail_unless (gst_caps_is_subset (c2, c1));
+
+  gst_caps_unref (c2);
   c2 = gst_caps_from_string ("audio/x-raw, format=(string){ F32LE, F32LE }");
 
   fail_unless (gst_caps_is_subset (c1, c2));
+  fail_unless (gst_caps_is_subset (c2, c1));
+
+  gst_caps_unref (c2);
+  c2 = gst_caps_from_string
+      ("audio/x-raw, format=(string){ F32LE, F32LE, F32LE }");
+
+  fail_unless (gst_caps_is_subset (c1, c2));
+  fail_unless (gst_caps_is_subset (c2, c1));
+
   gst_caps_unref (c1);
   gst_caps_unref (c2);
 }
@@ -1111,7 +1132,7 @@ gst_caps_suite (void)
   tcase_add_test (tc_chain, test_simplify);
   tcase_add_test (tc_chain, test_truncate);
   tcase_add_test (tc_chain, test_subset);
-  tcase_skip_broken_test (tc_chain, test_subset_duplication);
+  tcase_add_test (tc_chain, test_subset_duplication);
   tcase_add_test (tc_chain, test_merge_fundamental);
   tcase_add_test (tc_chain, test_merge_same);
   tcase_add_test (tc_chain, test_merge_subset);