+/**
+ * gst_caps_intersect_first:
+ * @caps1: a #GstCaps to intersect
+ * @caps2: a #GstCaps to intersect
+ *
+ * Creates a new #GstCaps that contains all the formats that are common
+ * to both @caps1 and @caps2.
+ *
+ * Unlike @gst_caps_intersect, the returned caps will be ordered in a similar
+ * fashion as @caps1.
+ *
+ * Returns: the new #GstCaps
+ */
+static GstCaps *
+gst_caps_intersect_first (const GstCaps * caps1, const GstCaps * caps2)
+{
+ guint i;
+ guint j, len1, len2;
+
+ GstStructure *struct1;
+ GstStructure *struct2;
+ GstCaps *dest;
+ GstStructure *istruct;
+
+ /* caps are exactly the same pointers, just copy one caps */
+ if (G_UNLIKELY (caps1 == caps2))
+ return gst_caps_copy (caps1);
+
+ /* empty caps on either side, return empty */
+ if (G_UNLIKELY (CAPS_IS_EMPTY (caps1) || CAPS_IS_EMPTY (caps2)))
+ return gst_caps_new_empty ();
+
+ /* one of the caps is any, just copy the other caps */
+ if (G_UNLIKELY (CAPS_IS_ANY (caps1)))
+ return gst_caps_copy (caps2);
+ if (G_UNLIKELY (CAPS_IS_ANY (caps2)))
+ return gst_caps_copy (caps1);
+
+ dest = gst_caps_new_empty ();
+
+ len1 = caps1->structs->len;
+ len2 = caps2->structs->len;
+ for (i = 0; i < len1; i++) {
+ struct1 = gst_caps_get_structure_unchecked (caps1, i);
+ for (j = 0; j < len2; j++) {
+ struct2 = gst_caps_get_structure_unchecked (caps2, j);
+ istruct = gst_structure_intersect (struct1, struct2);
+ if (istruct)
+ gst_caps_merge_structure (dest, istruct);
+ }
+ }
+
+ return dest;
+}
+
+/**
+ * gst_caps_intersect_full:
+ * @caps1: a #GstCaps to intersect
+ * @caps2: a #GstCaps to intersect
+ * @mode: The intersection algorithm/mode to use
+ *
+ * Creates a new #GstCaps that contains all the formats that are common
+ * to both @caps1 and @caps2, the order is defined by the #GstCapsIntersectMode
+ * used.
+ *
+ * Returns: the new #GstCaps
+ * Since: 0.10.33
+ */
+GstCaps *
+gst_caps_intersect_full (const GstCaps * caps1, const GstCaps * caps2,
+ GstCapsIntersectMode mode)
+{
+ g_return_val_if_fail (GST_IS_CAPS (caps1), NULL);
+ g_return_val_if_fail (GST_IS_CAPS (caps2), NULL);
+
+ switch (mode) {
+ case GST_CAPS_INTERSECT_FIRST:
+ return gst_caps_intersect_first (caps1, caps2);
+ default:
+ g_warning ("Unknown caps intersect mode: %d", mode);
+ /* fallthrough */
+ case GST_CAPS_INTERSECT_ZIG_ZAG:
+ return gst_caps_intersect_zig_zag (caps1, caps2);
+ }
+}
+
+/**
+ * gst_caps_intersect:
+ * @caps1: a #GstCaps to intersect
+ * @caps2: a #GstCaps to intersect
+ *
+ * Creates a new #GstCaps that contains all the formats that are common
+ * to both @caps1 and @caps2. Defaults to %GST_CAPS_INTERSECT_ZIG_ZAG mode.
+ *
+ * Returns: the new #GstCaps
+ */
+GstCaps *
+gst_caps_intersect (const GstCaps * caps1, const GstCaps * caps2)
+{
+ return gst_caps_intersect_full (caps1, caps2, GST_CAPS_INTERSECT_ZIG_ZAG);
+}
+
+
projects / platform / upstream / gstreamer.git / blobdiff