message: add step-start message

docs/gst/gstreamer-sections.txt

@@ -1146,6 +1146,8 @@ gst_message_new_latency
 gst_message_new_async_start
 gst_message_parse_async_start
 gst_message_new_async_done
+gst_message_new_step_start
+gst_message_parse_step_start
 
 GstStructureChangeType
 gst_message_new_structure_change

gst/gstmessage.c

@@ -110,6 +110,7 @@ static GstMessageQuarks message_quarks[] = {
   {GST_MESSAGE_ASYNC_START, "async-start", 0},
   {GST_MESSAGE_ASYNC_DONE, "async-done", 0},
   {GST_MESSAGE_REQUEST_STATE, "request-state", 0},
+  {GST_MESSAGE_STEP_START, "step-start", 0},
   {0, NULL, 0}
 };
 
@@ -1723,3 +1724,28 @@ gst_message_parse_step_done (GstMessage * message, GstFormat * format,
         g_value_get_uint64 (gst_structure_id_get_value (message->structure,
             GST_QUARK (DURATION)));
 }
+
+GstMessage *
+gst_message_new_step_start (GstObject * src, gboolean active)
+{
+  GstMessage *message;
+  GstStructure *structure;
+
+  structure = gst_structure_id_new (GST_QUARK (MESSAGE_STEP_START),
+      GST_QUARK (ACTIVE), G_TYPE_BOOLEAN, active, NULL);
+  message = gst_message_new_custom (GST_MESSAGE_STEP_START, src, structure);
+
+  return message;
+}
+
+void
+gst_message_parse_step_start (GstMessage * message, gboolean * active)
+{
+  g_return_if_fail (GST_IS_MESSAGE (message));
+  g_return_if_fail (GST_MESSAGE_TYPE (message) == GST_MESSAGE_STEP_START);
+
+  if (active)
+    *active =
+        g_value_get_boolean (gst_structure_id_get_value (message->structure,
+            GST_QUARK (ACTIVE)));
+}

gst/gstmessage.h

@@ -84,6 +84,7 @@ typedef struct _GstMessageClass GstMessageClass;
  * @GST_MESSAGE_REQUEST_STATE: Posted by elements when they want the pipeline to
  * change state. This message is a suggestion to the application which can
  * decide to perform the state change on (part of) the pipeline. Since: 0.10.23.
+ * @GST_MESSAGE_STEP_START: A stepping operation was started.
  * @GST_MESSAGE_ANY: mask for all of the above messages.
  *
  * The different message types that are available.
@@ -117,6 +118,7 @@ typedef enum
   GST_MESSAGE_ASYNC_START       = (1 << 20),
   GST_MESSAGE_ASYNC_DONE        = (1 << 21),
   GST_MESSAGE_REQUEST_STATE     = (1 << 22),
+  GST_MESSAGE_STEP_START        = (1 << 23),
   GST_MESSAGE_ANY               = ~0
 } GstMessageType;
 
@@ -463,6 +465,10 @@ const GValue *  gst_message_get_stream_status_object (GstMessage *message);
 GstMessage *    gst_message_new_request_state   (GstObject * src, GstState state);
 void            gst_message_parse_request_state (GstMessage * message, GstState *state);
 
+/* STEP_START */
+GstMessage *    gst_message_new_step_start      (GstObject * src, gboolean active);
+void            gst_message_parse_step_start    (GstMessage * message, gboolean *active);
+
 /* custom messages */
 GstMessage *	gst_message_new_custom		(GstMessageType type,
 						 GstObject    * src,

gst/gstquark.c

@@ -47,7 +47,7 @@ static const gchar *_quark_strings[] = {
   "GstQueryPosition", "GstQueryDuration", "GstQueryLatency", "GstQueryConvert",
   "GstQuerySegment", "GstQuerySeeking", "GstQueryFormats", "GstQueryBuffering",
   "GstQueryURI", "GstEventStep", "GstMessageStepDone", "amount", "flush",
-  "intermediate"
+  "intermediate", "GstMessageStepStart", "active"
 };
 
 GQuark _priv_gst_quark_table[GST_QUARK_MAX];

gst/gstquark.h

@@ -114,8 +114,10 @@ typedef enum _GstQuarkId
   GST_QUARK_AMOUNT = 85,
   GST_QUARK_FLUSH = 86,
   GST_QUARK_INTERMEDIATE = 87,
+  GST_QUARK_MESSAGE_STEP_START = 88,
+  GST_QUARK_ACTIVE = 89,
 
-  GST_QUARK_MAX = 88
+  GST_QUARK_MAX = 90
 } GstQuarkId;
 
 extern GQuark _priv_gst_quark_table[GST_QUARK_MAX];

win32/common/libgstreamer.def

@@ -493,6 +493,7 @@ EXPORTS
 	gst_message_new_state_changed
 	gst_message_new_state_dirty
 	gst_message_new_step_done
+	gst_message_new_step_start
 	gst_message_new_stream_status
 	gst_message_new_structure_change
 	gst_message_new_tag
@@ -512,6 +513,7 @@ EXPORTS
 	gst_message_parse_segment_start
 	gst_message_parse_state_changed
 	gst_message_parse_step_done
+	gst_message_parse_step_start
 	gst_message_parse_stream_status
 	gst_message_parse_structure_change
 	gst_message_parse_tag