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message: Add gst_message_writable_structure()
Add gst_message_writable_structure() to be able to add extra fields to messages (and be on par with GstEvent). https://bugzilla.gnome.org/show_bug.cgi?id=792928
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5 changed files with 50 additions and 0 deletions
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@ -1638,6 +1638,7 @@ gst_message_ref
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gst_message_unref
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gst_message_copy
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gst_message_get_structure
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gst_message_writable_structure
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gst_message_make_writable
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gst_message_get_seqnum
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gst_message_set_seqnum
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@ -1158,6 +1158,43 @@ gst_message_get_structure (GstMessage * message)
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return GST_MESSAGE_STRUCTURE (message);
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}
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/**
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* gst_message_writable_structure:
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* @message: The #GstMessage.
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*
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* Get a writable version of the structure.
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*
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* Returns: (transfer none): The structure of the message. The structure
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* is still owned by the message, which means that you should not free
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* it and that the pointer becomes invalid when you free the message.
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* This function checks if @message is writable and will never return
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* %NULL.
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*
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* MT safe.
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*
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* Since: 1.14
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*/
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GstStructure *
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gst_message_writable_structure (GstMessage * message)
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{
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GstStructure *structure;
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g_return_val_if_fail (GST_IS_MESSAGE (message), NULL);
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g_return_val_if_fail (gst_message_is_writable (message), NULL);
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structure = GST_MESSAGE_STRUCTURE (message);
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if (structure == NULL) {
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structure =
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gst_structure_new_id_empty (gst_message_type_to_quark (GST_MESSAGE_TYPE
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(message)));
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gst_structure_set_parent_refcount (structure,
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&message->mini_object.refcount);
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GST_MESSAGE_STRUCTURE (message) = structure;
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}
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return structure;
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}
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/**
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* gst_message_has_name:
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* @message: The #GstMessage.
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@ -449,6 +449,9 @@ GST_EXPORT
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const GstStructure *
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gst_message_get_structure (GstMessage *message);
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GST_EXPORT
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GstStructure * gst_message_writable_structure (GstMessage *message);
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GST_EXPORT
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gboolean gst_message_has_name (GstMessage *message, const gchar *name);
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@ -35,10 +35,18 @@ GST_START_TEST (test_parsing)
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/* GST_MESSAGE_EOS */
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{
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GstStructure *s;
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message = gst_message_new_eos (NULL);
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fail_if (message == NULL);
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fail_unless (GST_MESSAGE_TYPE (message) == GST_MESSAGE_EOS);
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fail_unless (GST_MESSAGE_SRC (message) == NULL);
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/* Add an extra field */
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s = gst_message_writable_structure (message);
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fail_if (s == NULL);
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gst_structure_set (s, "eos-extra-field", G_TYPE_BOOLEAN, TRUE, NULL);
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gst_message_unref (message);
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}
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/* GST_MESSAGE_ERROR */
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@ -826,6 +826,7 @@ EXPORTS
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gst_message_type_get_name
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gst_message_type_get_type
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gst_message_type_to_quark
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gst_message_writable_structure
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gst_meta_api_type_get_tags
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gst_meta_api_type_has_tag
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gst_meta_api_type_register
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