encoding-profile: Make (de)serialization functions public

This is more convenient and cheaper than going through the `g_value_convert()`
hoops

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6712>

girs/GstPbutils-1.0.gir

@@ -1733,6 +1733,23 @@ subtitles), are currently ignored.</doc>
           </parameter>
         </parameters>
       </function>
+      <function name="from_string" c:identifier="gst_encoding_profile_from_string" version="1.26">
+        <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">Converts a string in the "encoding profile serialization format" into a
+GstEncodingProfile. Refer to the encoding-profile documentation for details
+on the format.</doc>
+        <source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.h"/>
+        <return-value transfer-ownership="full">
+          <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">A newly created GstEncodingProfile or NULL if the
+input string is not a valid encoding profile serialization format.</doc>
+          <type name="EncodingProfile" c:type="GstEncodingProfile*"/>
+        </return-value>
+        <parameters>
+          <parameter name="string" transfer-ownership="none">
+            <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">The string to convert into a GstEncodingProfile.</doc>
+            <type name="utf8" c:type="const gchar*"/>
+          </parameter>
+        </parameters>
+      </function>
       <method name="copy" c:identifier="gst_encoding_profile_copy" version="1.12">
         <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">Makes a deep copy of @self</doc>
         <source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.h"/>
@@ -2175,6 +2192,22 @@ single segment before the encoder, #FALSE otherwise.</doc>
           </parameter>
         </parameters>
       </method>
+      <method name="to_string" c:identifier="gst_encoding_profile_to_string" version="1.26">
+        <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">Converts a GstEncodingProfile to a string in the "Encoding Profile
+serialization format".</doc>
+        <source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.h"/>
+        <return-value transfer-ownership="full">
+          <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">A string representation of the GstEncodingProfile,
+  or NULL if the input is invalid.</doc>
+          <type name="utf8" c:type="gchar*"/>
+        </return-value>
+        <parameters>
+          <instance-parameter name="profile" transfer-ownership="none">
+            <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">The GstEncodingProfile to convert.</doc>
+            <type name="EncodingProfile" c:type="GstEncodingProfile*"/>
+          </instance-parameter>
+        </parameters>
+      </method>
       <property name="element-properties" version="1.20" writable="1" transfer-ownership="none">
         <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c">A #GstStructure defining the properties to be set to the element
 the profile represents.

subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.c

@@ -2068,8 +2068,21 @@ error:
   goto done;
 }
 
-static GstEncodingProfile *
-profile_from_string (const gchar * string)
+/**
+ * gst_encoding_profile_from_string:
+ * @string: The string to convert into a GstEncodingProfile.
+ *
+ * Converts a string in the "encoding profile serialization format" into a
+ * GstEncodingProfile. Refer to the encoding-profile documentation for details
+ * on the format.
+ *
+ * Since: 1.26
+ *
+ * Returns: (transfer full): A newly created GstEncodingProfile or NULL if the
+ * input string is not a valid encoding profile serialization format.
+ */
+GstEncodingProfile *
+gst_encoding_profile_from_string (const gchar * string)
 {
   GstEncodingProfile *profile;
   gchar *filename_end;
@@ -2117,7 +2130,7 @@ string_to_profile_transform (const GValue * src_value, GValue * dest_value)
 
   profilename = g_value_get_string (src_value);
 
-  profile = profile_from_string (profilename);
+  profile = gst_encoding_profile_from_string (profilename);
 
   if (profile)
     g_value_take_object (dest_value, (GObject *) profile);
@@ -2156,23 +2169,45 @@ serialize_profile (GString * res, GstEncodingProfile * profile)
   }
 }
 
-static gchar *
-gst_encoding_profile_serialize_valfunc (GValue * value)
+/**
+ * gst_encoding_profile_to_string:
+ * @profile: (transfer none): The GstEncodingProfile to convert.
+ *
+ * Converts a GstEncodingProfile to a string in the "Encoding Profile
+ * serialization format".
+ *
+ * Since: 1.26
+ *
+ * Returns: (transfer full): A string representation of the GstEncodingProfile,
+ *   or NULL if the input is invalid.
+ */
+gchar *
+gst_encoding_profile_to_string (GstEncodingProfile * profile)
 {
-  GString *res = g_string_new (NULL);
-  GstEncodingProfile *profile = g_value_get_object (value);
+  GString *res;
+
+  g_return_val_if_fail (profile != NULL, NULL);
+
+  res = g_string_new (NULL);
 
   serialize_profile (res, profile);
 
   return g_string_free (res, FALSE);
 }
 
+static gchar *
+gst_encoding_profile_serialize_valfunc (GValue * value)
+{
+  GstEncodingProfile *profile = g_value_get_object (value);
+  return gst_encoding_profile_to_string (profile);
+}
+
 static gboolean
 gst_encoding_profile_deserialize_valfunc (GValue * value, const gchar * s)
 {
   GstEncodingProfile *profile;
 
-  profile = profile_from_string (s);
+  profile = gst_encoding_profile_from_string (s);
 
   if (profile) {
     g_value_take_object (value, (GObject *) profile);

subprojects/gst-plugins-base/gst-libs/gst/pbutils/encoding-profile.h

@@ -266,6 +266,12 @@ GstEncodingProfile * gst_encoding_profile_from_discoverer (GstDiscovererInfo *in
 GST_PBUTILS_API
 GstEncodingProfile * gst_encoding_profile_copy            (GstEncodingProfile *self);
 
+GST_PBUTILS_API
+GstEncodingProfile * gst_encoding_profile_from_string     (const gchar *string);
+
+GST_PBUTILS_API
+gchar * gst_encoding_profile_to_string     (GstEncodingProfile *profile);
+
 GST_PBUTILS_API
 void gst_encoding_profile_set_element_properties          (GstEncodingProfile *self,
                                                            GstStructure *element_properties);