--- /dev/null
+/*
+ * filter_region.c -- region 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_region.h"
+#include "transition_composite.h"
+
+#include <framework/mlt.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int create_instance( mlt_filter this, char *name, char *value, int count )
+{
+ // Return from this function
+ int error = 0;
+
+ // Duplicate the value
+ char *type = strdup( value );
+
+ // Pointer to filter argument
+ char *arg = type == NULL ? NULL : strchr( type, ':' );
+
+ // New filter being created
+ mlt_filter filter = NULL;
+
+ // Cleanup type and arg
+ if ( arg != NULL )
+ *arg ++ = '\0';
+
+ // Create the filter
+ filter = mlt_factory_filter( type, arg );
+
+ // If we have a filter, then initialise and store it
+ if ( filter != NULL )
+ {
+ // Properties of this
+ mlt_properties properties = mlt_filter_properties( this );
+
+ // String to hold the property name
+ char id[ 256 ];
+
+ // String to hold the passdown key
+ char key[ 256 ];
+
+ // Construct id
+ sprintf( id, "_filter_%d", count );
+
+ // Counstruct key
+ sprintf( key, "%s.", name );
+
+ // Pass all the key properties on the filter down
+ mlt_properties_pass( mlt_filter_properties( filter ), properties, key );
+
+ // Ensure that filter is assigned
+ mlt_properties_set_data( properties, id, filter, 0, ( mlt_destructor )mlt_filter_close, NULL );
+ }
+ else
+ {
+ // Indicate that an error has occurred
+ error = 1;
+ }
+
+ // Cleanup
+ free( type );
+
+ // Return error condition
+ return error;
+}
+
+/** Do it :-).
+*/
+
+static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+{
+ // Error we will return
+ int error = 0;
+
+ // Get the watermark filter object
+ mlt_filter this = mlt_frame_pop_service( frame );
+
+ // Get the properties of the filter
+ mlt_properties properties = mlt_filter_properties( this );
+
+ // Get the composite from the filter
+ mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL );
+
+ // Look for the first filter
+ mlt_filter filter = mlt_properties_get_data( properties, "_filter_0", NULL );
+
+ // Create a composite if we don't have one
+ if ( composite == NULL )
+ {
+ // Create composite via the factory
+ composite = mlt_factory_transition( "composite", NULL );
+
+ // If we have one
+ if ( composite != NULL )
+ {
+ // Get the properties
+ mlt_properties composite_properties = mlt_transition_properties( composite );
+
+ // We want to ensure that we don't get a wobble...
+ mlt_properties_set( composite_properties, "distort", "true" );
+ mlt_properties_set( composite_properties, "progressive", "1" );
+
+ // Pass all the composite. properties on the filter down
+ mlt_properties_pass( composite_properties, properties, "composite." );
+
+ // Register the composite for reuse/destruction
+ mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL );
+ }
+ }
+
+ // Create filters
+ if ( filter == NULL )
+ {
+ // Loop Variable
+ int i = 0;
+
+ // Number of filters created
+ int count = 0;
+
+ // Loop for all properties
+ for ( i = 0; i < mlt_properties_count( properties ); i ++ )
+ {
+ // Get the name of this property
+ char *name = mlt_properties_get_name( properties, i );
+
+ // If the name does not contain a . and matches filter
+ if ( strchr( name, '.' ) == NULL && !strncmp( name, "filter", 6 ) )
+ {
+ // Get the filter constructor
+ char *value = mlt_properties_get_value( properties, i );
+
+ // Create an instance
+ if ( create_instance( this, name, value, count ) == 0 )
+ count ++;
+ }
+ }
+ }
+
+ // Get the image
+ error = mlt_frame_get_image( frame, image, format, width, height, 1 );
+
+ // Only continue if we have both filter and composite
+ if ( composite != NULL && filter != NULL )
+ {
+ // String to hold the filter to query on
+ char id[ 256 ];
+
+ // Index to hold the count
+ int i = 0;
+
+ // We will get the 'b frame' from the composite
+ mlt_frame b_frame = composite_copy_region( composite, frame );
+
+ // Make sure the filter is in the correct position
+ while ( filter != NULL )
+ {
+ // Stack this filter
+ mlt_filter_process( filter, b_frame );
+
+ // Generate the key for the next
+ sprintf( id, "_filter_%d", ++ i );
+
+ // Get the next filter
+ filter = mlt_properties_get_data( properties, id, NULL );
+ }
+
+ // Get the b frame and process with composite if successful
+ mlt_transition_process( composite, frame, b_frame );
+
+ // Get the image
+ error = mlt_frame_get_image( frame, image, format, width, height, 0 );
+
+ // Close the b frame
+ mlt_frame_close( b_frame );
+ }
+
+ return error;
+}
+
+/** Filter processing.
+*/
+
+static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
+{
+ // Push the filter on to the frame
+ mlt_frame_push_service( frame, this );
+
+ // Push the filter method
+ mlt_frame_push_get_image( frame, filter_get_image );
+
+ // Return the frame
+ return frame;
+}
+
+/** Constructor for the filter.
+*/
+
+mlt_filter filter_region_init( void *arg )
+{
+ // Create a new filter
+ mlt_filter this = mlt_filter_new( );
+
+ // Further initialisation
+ if ( this != NULL )
+ {
+ // Get the properties from the filter
+ mlt_properties properties = mlt_filter_properties( this );
+
+ // Assign the filter process method
+ this->process = filter_process;
+
+ // Resource defines the shape of the region
+ mlt_properties_set( properties, "resource", arg == NULL ? "rectangle" : arg );
+ }
+
+ // Return the filter
+ return this;
+}
+
projects / mlt / blobdiff