X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fframework%2Fmlt_transition.h;h=3e9d4513f9d12cb4826f9e8412e8cc10585c771b;hb=86e90032adedba2a87c80f922d286c1c8742fa40;hp=9db26b3b91452a801fcd3a5f2bbcca74143bba16;hpb=da46016cc4e9c751ab346b9b8f451a59cd276b03;p=mlt

diff --git a/src/framework/mlt_transition.h b/src/framework/mlt_transition.h
index 9db26b3b..3e9d4513 100644
--- a/src/framework/mlt_transition.h
+++ b/src/framework/mlt_transition.h
@@ -1,21 +1,24 @@
-/*
- * mlt_transition.h -- abstraction for all transition services
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_transition.h
+ * \brief abstraction for all transition services
+ * \see mlt_transition_s
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
  *
- * This program is distributed in the hope that it will be useful,
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _MLT_TRANSITION_H_
@@ -23,34 +26,40 @@
 
 #include "mlt_service.h"
 
-/** The interface definition for all transitions.
-*/
+/** \brief Transition abstract service class
+ *
+ * A transition may modify the output of a producer based on the output of a second producer.
+ *
+ * \extends mlt_service_s
+ * \properties \em a_track the track index (0-based) of a multitrack of the first producer
+ * \properties \em b_track the track index (0-based) of a multitrack of the second producer
+ * \properties \em accepts_blanks a flag to indicate if the transition should accept blank frames
+ * \properties \em always_active a flag to indicate that the in and out points do not apply
+ * \properties \em _transition_type 1 for video, 2 for audio
+ */
 
 struct mlt_transition_s
 {
-	// We're implementing service here
+	/** We're implementing service here */
 	struct mlt_service_s parent;
 
-	// public virtual
+	/** public virtual */
 	void ( *close )( mlt_transition );
 
-	// protected transition method
+	/** protected transition method */
 	mlt_frame ( *process )( mlt_transition, mlt_frame, mlt_frame );
 
-	// Protected
+	/** Protected */
 	void *child;
-	
-	// track and in/out points
+
+	/** track and in/out points */
 	mlt_service producer;
-	
-	// Private
+
+	/** Private */
 	mlt_frame *frames;
 	int held;
 };
 
-/** Public final methods
-*/
-
 #define MLT_TRANSITION_SERVICE( transition )		( &( transition )->parent )
 #define MLT_TRANSITION_PROPERTIES( transition )		MLT_SERVICE_PROPERTIES( MLT_TRANSITION_SERVICE( transition ) )
 
@@ -64,6 +73,10 @@ extern int mlt_transition_get_a_track( mlt_transition self );
 extern int mlt_transition_get_b_track( mlt_transition self );
 extern mlt_position mlt_transition_get_in( mlt_transition self );
 extern mlt_position mlt_transition_get_out( mlt_transition self );
+extern mlt_position mlt_transition_get_length( mlt_transition self );
+extern mlt_position mlt_transition_get_position( mlt_transition self, mlt_frame frame );
+extern double mlt_transition_get_progress( mlt_transition self, mlt_frame frame );
+extern double mlt_transition_get_progress_delta( mlt_transition self, mlt_frame frame );
 extern mlt_frame mlt_transition_process( mlt_transition self, mlt_frame a_frame, mlt_frame b_frame );
 extern void mlt_transition_close( mlt_transition self );