--- /dev/null
+/*
+ * filter_obscure.c -- obscure 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_obscure.h"
+
+#include <framework/mlt_frame.h>
+#include <framework/mlt_deque.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/** Geometry struct.
+*/
+
+struct geometry_s
+{
+ float x;
+ float y;
+ float w;
+ float h;
+ int mask_w;
+ int mask_h;
+};
+
+/** Parse a geometry property string.
+*/
+
+static void geometry_parse( struct geometry_s *geometry, struct geometry_s *defaults, char *property )
+{
+ // Assign from defaults if available
+ if ( defaults != NULL )
+ {
+ geometry->x = defaults->x;
+ geometry->y = defaults->y;
+ geometry->w = defaults->w;
+ geometry->h = defaults->h;
+ geometry->mask_w = defaults->mask_w;
+ geometry->mask_h = defaults->mask_h;
+ }
+ else
+ {
+ geometry->mask_w = 20;
+ geometry->mask_h = 20;
+ }
+
+ // Parse the geomtry string
+ if ( property != NULL )
+ sscanf( property, "%f,%f:%fx%f:%dx%d", &geometry->x, &geometry->y, &geometry->w, &geometry->h, &geometry->mask_w, &geometry->mask_h );
+}
+
+/** A Timism but not as clean ;-).
+*/
+
+static float lerp( float value, float lower, float upper )
+{
+ if ( value < lower )
+ return lower;
+ else if ( value > upper )
+ return upper;
+ return value;
+}
+
+/** Calculate real geometry.
+*/
+
+static void geometry_calculate( struct geometry_s *output, struct geometry_s *in, struct geometry_s *out, float position )
+{
+ // Calculate this frames geometry
+ output->x = lerp( in->x + ( out->x - in->x ) * position, 0, 100 );
+ output->y = lerp( in->y + ( out->y - in->y ) * position, 0, 100 );
+ output->w = lerp( in->w + ( out->w - in->w ) * position, 0, 100 - output->x );
+ output->h = lerp( in->h + ( out->h - in->h ) * position, 0, 100 - output->y );
+ output->mask_w = in->mask_w + ( out->mask_w - in->mask_w ) * position;
+ output->mask_h = in->mask_h + ( out->mask_h - in->mask_h ) * position;
+}
+
+/** Calculate the position for this frame.
+*/
+
+static float position_calculate( mlt_filter this, mlt_frame frame )
+{
+ // Get the in and out position
+ mlt_position in = mlt_filter_get_in( this );
+ mlt_position out = mlt_filter_get_out( this );
+
+ // Get the position of the frame
+ mlt_position position = mlt_frame_get_position( frame );
+
+ // Now do the calcs
+ return ( float )( position - in ) / ( float )( out - in + 1 );
+}
+
+/** The averaging function...
+*/
+
+void obscure_average( uint8_t *start, int width, int height, int stride )
+{
+ int y;
+ int x;
+ int Y = ( *start + *( start + 2 ) ) / 2;
+ int U = *( start + 1 );
+ int V = *( start + 3 );
+
+ for ( y = 0; y < height; y ++ )
+ {
+ uint8_t *p = start + y * stride;
+ for ( x = 0; x < width / 2; x ++ )
+ {
+ Y = ( Y + *p ++ ) / 2;
+ U = ( U + *p ++ ) / 2;
+ Y = ( Y + *p ++ ) / 2;
+ V = ( V + *p ++ ) / 2;
+ }
+ }
+
+ for ( y = 0; y < height; y ++ )
+ {
+ uint8_t *p = start + y * stride;
+ for ( x = 0; x < width / 2; x ++ )
+ {
+ *p ++ = Y;
+ *p ++ = U;
+ *p ++ = Y;
+ *p ++ = V;
+ }
+ }
+}
+
+
+/** The obscurer rendering function...
+*/
+
+static void obscure_render( uint8_t *image, int width, int height, struct geometry_s result )
+{
+ int area_x = ( result.x / 100 ) * width;
+ int area_y = ( result.y / 100 ) * height;
+ int area_w = ( result.w / 100 ) * width;
+ int area_h = ( result.h / 100 ) * height;
+
+ int mw = result.mask_w;
+ int mh = result.mask_h;
+ int w;
+ int h;
+
+ uint8_t *p = image + area_y * width * 2 + area_x * 2;
+
+ for ( w = 0; w < area_w; w += mw )
+ {
+ for ( h = 0; h < area_h; h += mh )
+ {
+ int aw = w + mw > area_w ? mw - ( w + mw - area_w ) : mw;
+ int ah = h + mh > area_h ? mh - ( h + mh - area_h ) : mh;
+ if ( aw > 1 && ah > 1 );
+ obscure_average( p + h * width * 2 + w * 2, aw, ah, width * 2 );
+ }
+ }
+}
+
+/** Do it :-).
+*/
+
+static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+{
+ // Get the frame properties
+ mlt_properties frame_properties = mlt_frame_properties( frame );
+
+ // Fetch the obscure stack for this frame
+ mlt_deque deque = mlt_properties_get_data( frame_properties, "filter_obscure", NULL );
+
+ // Pop the top of stack now
+ mlt_filter this = mlt_deque_pop_back( deque );
+
+ // Get the image from the frame
+ if ( mlt_frame_get_image( frame, image, format, width, height, 1 ) == 0 )
+ {
+ if ( this != NULL )
+ {
+ // Get the filter properties
+ mlt_properties properties = mlt_filter_properties( this );
+
+ // Structures for geometry
+ struct geometry_s result;
+ struct geometry_s start;
+ struct geometry_s end;
+
+ // Calculate the position
+ float position = position_calculate( this, frame );
+
+ // Now parse the geometries
+ geometry_parse( &start, NULL, mlt_properties_get( properties, "start" ) );
+ geometry_parse( &end, &start, mlt_properties_get( properties, "end" ) );
+
+ // Do the calculation
+ geometry_calculate( &result, &start, &end, position );
+
+ // Now actually render it
+ obscure_render( *image, *width, *height, result );
+ }
+ }
+
+ return 0;
+}
+
+/** Filter processing.
+*/
+
+static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
+{
+ // Get the frame properties
+ mlt_properties frame_properties = mlt_frame_properties( frame );
+
+ // Fetch the obscure stack for this frame
+ mlt_deque deque = mlt_properties_get_data( frame_properties, "filter_obscure", NULL );
+
+ // Create stack if necessary
+ if ( deque == NULL )
+ {
+ // Create the deque
+ deque = mlt_deque_init( );
+
+ // Assign to the frame
+ mlt_properties_set_data( frame_properties, "filter_obscure", deque, 0, ( mlt_destructor )mlt_deque_close, NULL );
+ }
+
+ // Push this on to the obscure stack
+ mlt_deque_push_back( deque, this );
+
+ // Push the get image call
+ mlt_frame_push_get_image( frame, filter_get_image );
+
+ return frame;
+}
+
+/** Constructor for the filter.
+*/
+
+mlt_filter filter_obscure_init( void *arg )
+{
+ mlt_filter this = calloc( 1, sizeof( struct mlt_filter_s ) );
+ mlt_properties properties = mlt_filter_properties( this );
+ mlt_filter_init( this, NULL );
+ this->process = filter_process;
+ mlt_properties_set( properties, "start", "40,40:20x20" );
+ mlt_properties_set( properties, "end", "" );
+ return this;
+}
+
if ( result != NULL )
{
mlt_properties properties = mlt_producer_properties( result );
- fprintf( stderr, "resource = %s\n", mlt_properties_get( properties, "resource" ) );
mlt_properties_set( properties, "resource", file );
- fprintf( stderr, "resource = %s\n", mlt_properties_get( properties, "resource" ) );
}
while( count -- )
mlt_tractor tractor = mlt_field_tractor( field );
mlt_producer prod = mlt_tractor_producer( tractor );
mlt_properties props = mlt_tractor_properties( tractor );
- mlt_properties_set_data( props, "multitrack", multitrack, 0, NULL, NULL );
- mlt_properties_set_data( props, "field", field, 0, NULL, NULL );
- mlt_properties_set_data( props, "group", group, 0, NULL, NULL );
+ mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
+ mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
+ mlt_properties_set_data( props, "group", group, 0, ( mlt_destructor )mlt_properties_close, NULL );
mlt_properties_set_position( props, "length", mlt_producer_get_out( mlt_multitrack_producer( multitrack ) ) + 1 );
mlt_producer_set_in_and_out( prod, 0, mlt_producer_get_out( mlt_multitrack_producer( multitrack ) ) );
mlt_properties_set_double( props, "fps", mlt_producer_get_fps( mlt_multitrack_producer( multitrack ) ) );
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