Affine filter

[melted] / src / modules / plus / filter_affine.c

diff --git a/src/modules/plus/filter_affine.c b/src/modules/plus/filter_affine.c
new file mode 100644 (file)
index 0000000..a37b066
--- /dev/null
+++ b/src/modules/plus/filter_affine.c
@@ -0,0 +1,109 @@
+/*
+ * filter_affine.c -- affine filter
+ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
+ * Author: Charles Yates <charles.yates@pandora.be>
+ *
+ * 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.
+ *
+ * This program 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.
+ *
+ * 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.
+ */
+
+#include "filter_affine.h"
+
+#include <framework/mlt.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+/** Do it :-).
+*/
+
+static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+{
+       // Get the filter
+       mlt_filter filter = mlt_frame_pop_service( this );
+
+       // Get the properties
+       mlt_properties properties = mlt_filter_properties( filter );
+
+       // Get the image
+       int error = mlt_frame_get_image( this, image, format, width, height, 0 );
+
+       // Only process if we have no error and a valid colour space
+       if ( error == 0 && *format == mlt_image_yuv422 )
+       {
+               mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
+               mlt_transition transition = mlt_properties_get_data( properties, "transition", NULL );
+               mlt_frame a_frame = NULL;
+
+               if ( producer == NULL )
+               {
+                       char *background = mlt_properties_get( properties, "background" );
+                       producer = mlt_factory_producer( "fezzik", background );
+                       mlt_properties_set_data( properties, "producer", producer, 0, (mlt_destructor)mlt_producer_close, NULL );
+               }
+
+               if ( transition == NULL )
+               {
+                       transition = mlt_factory_transition( "affine", NULL );
+                       mlt_properties_set_data( properties, "transition", transition, 0, (mlt_destructor)mlt_transition_close, NULL );
+               }
+
+               if ( producer != NULL && transition != NULL )
+               {
+                       mlt_properties frame_properties = mlt_frame_properties( this );
+                       mlt_properties_pass( mlt_producer_properties( producer ), properties, "producer." );
+                       mlt_properties_pass( mlt_transition_properties( transition ), properties, "transition." );
+                       mlt_service_get_frame( mlt_producer_service( producer ), &a_frame, 0 );
+                       mlt_properties_set( mlt_frame_properties( a_frame ), "rescale_interp", "nearest" );
+                       mlt_properties_set( mlt_frame_properties( a_frame ), "distort", "true" );
+                       mlt_properties_set_double( mlt_frame_properties( a_frame ), "consumer_aspect_ratio", 
+                                                                          mlt_properties_get_double( frame_properties, "consumer_aspect_ratio" ) );
+                       mlt_transition_process( transition, a_frame, this );
+                       mlt_frame_get_image( a_frame, image, format, width, height, writable );
+                       mlt_properties_set_data( frame_properties, "affine_frame", a_frame, 0, (mlt_destructor)mlt_frame_close, NULL );
+                       mlt_properties_set_data( frame_properties, "image", *image, *width * *height * 2, NULL, NULL );
+               }
+       }
+
+       return error;
+}
+
+/** Filter processing.
+*/
+
+static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
+{
+       // Push the frame filter
+       mlt_frame_push_service( frame, this );
+       mlt_frame_push_get_image( frame, filter_get_image );
+       return frame;
+}
+
+/** Constructor for the filter.
+*/
+
+mlt_filter filter_affine_init( char *arg )
+{
+       mlt_filter this = mlt_filter_new( );
+       if ( this != NULL )
+       {
+               this->process = filter_process;
+               mlt_properties_set( mlt_filter_properties( this ), "background", "colour:black" );
+               mlt_properties_set( mlt_filter_properties( this ), "transition.rotate", "10" );
+       }
+       return this;
+}
+
+