+++ /dev/null
-/*
- * transition_region.c -- region transition
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
- *
- * 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
- * Lesser General Public License for more details.
- *
- * 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
- */
-
-#include "transition_region.h"
-#include "transition_composite.h"
-
-#include <framework/mlt.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-static int create_instance( mlt_transition 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
- mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
- filter = mlt_factory_filter( profile, type, arg );
-
- // If we have a filter, then initialise and store it
- if ( filter != NULL )
- {
- // Properties of this
- mlt_properties properties = MLT_TRANSITION_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 );
-
- // Just in case, let's assume that the filter here has a composite
- //mlt_properties_set( MLT_FILTER_PROPERTIES( filter ), "composite.geometry", "0%,0%:100%x100%" );
- //mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "composite.fill", 1 );
-
- // 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;
-}
-
-static uint8_t *filter_get_alpha_mask( mlt_frame this )
-{
- uint8_t *alpha = NULL;
-
- // Obtain properties of frame
- mlt_properties properties = MLT_FRAME_PROPERTIES( this );
-
- // Get the shape frame
- mlt_frame shape_frame = mlt_properties_get_data( properties, "shape_frame", NULL );
-
- // Get the width and height of the image
- int region_width = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "width" );
- int region_height = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "height" );
- uint8_t *image = NULL;
- mlt_image_format format = mlt_image_yuv422;
-
- // Get the shape image to trigger alpha creation
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( shape_frame ), "distort", 1 );
- mlt_frame_get_image( shape_frame, &image, &format, ®ion_width, ®ion_height, 0 );
-
- alpha = mlt_frame_get_alpha_mask( shape_frame );
-
- // Generate from the Y component of the image if no alpha available
- if ( alpha == NULL )
- {
- int size = region_width * region_height;
- uint8_t *p = mlt_pool_alloc( size );
- alpha = p;
- while ( size -- )
- {
- *p ++ = ( int )( ( ( *image ++ - 16 ) * 299 ) / 255 );
- image ++;
- }
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "alpha", alpha, region_width * region_height, mlt_pool_release, NULL );
- }
- else
- {
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "alpha", alpha, region_width * region_height, NULL, NULL );
- }
-
- this->get_alpha_mask = NULL;
-
- return alpha;
-}
-
-/** Do it :-).
-*/
-
-static int transition_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;
-
- // We will get the 'b frame' from the frame stack
- mlt_frame b_frame = mlt_frame_pop_frame( frame );
-
- // Get the watermark transition object
- mlt_transition this = mlt_frame_pop_service( frame );
-
- // Get the properties of the transition
- mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
-
- // Get the composite from the transition
- 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 );
-
- // Get the unique id of the filter (used to reacquire the producer position)
- char *name = mlt_properties_get( properties, "_unique_id" );
-
- // Get the original producer position
- mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
-
- // Create a composite if we don't have one
- if ( composite == NULL )
- {
- // Create composite via the factory
- mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
- composite = mlt_factory_transition( profile, "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_int( composite_properties, "distort", 1 );
- mlt_properties_set_int( composite_properties, "progressive", 1 );
-
- // Pass all the composite. properties on the transition 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 );
- }
- }
- else
- {
- // Pass all current properties down
- mlt_properties composite_properties = MLT_TRANSITION_PROPERTIES( composite );
- mlt_properties_pass( composite_properties, properties, "composite." );
- }
-
- // 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 ++;
- }
- }
-
- // Look for the first filter again
- filter = mlt_properties_get_data( properties, "_filter_0", NULL );
- }
- else
- {
- // Pass all properties down
- mlt_filter temp = NULL;
-
- // Loop Variable
- int i = 0;
-
- // Number of filters found
- 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 ) )
- {
- // Strings to hold the id and pass down key
- char id[ 256 ];
- char key[ 256 ];
-
- // Construct id and key
- sprintf( id, "_filter_%d", count );
- sprintf( key, "%s.", name );
-
- // Get the filter
- temp = mlt_properties_get_data( properties, id, NULL );
-
- if ( temp != NULL )
- {
- mlt_properties_pass( MLT_FILTER_PROPERTIES( temp ), properties, key );
- 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 )
- {
- // Get the resource of this filter (could be a shape [rectangle/circle] or an alpha provider of choice
- const char *resource = mlt_properties_get( properties, "resource" );
-
- // Get the old resource in case it's changed
- char *old_resource = mlt_properties_get( properties, "_old_resource" );
-
- // 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 only if it's NULL
- if ( b_frame == NULL )
- {
- // Copy the region
- b_frame = composite_copy_region( composite, frame, position );
-
- // Ensure a destructor
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), name, b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
- }
-
- // Set the position of the b_frame
- mlt_frame_set_position( b_frame, position );
-
- // Make sure the filter is in the correct position
- while ( filter != NULL )
- {
- // Stack this filter
- if ( mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "off" ) == 0 )
- 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 );
- }
-
- // Allow filters to be attached to a region filter
- filter = mlt_properties_get_data( properties, "_region_filter", NULL );
- if ( filter != NULL )
- mlt_service_apply_filters( MLT_FILTER_SERVICE( filter ), b_frame, 0 );
-
- // Hmm - this is probably going to go wrong....
- mlt_frame_set_position( frame, position );
-
- // Get the b frame and process with composite if successful
- mlt_transition_process( composite, frame, b_frame );
-
- // If we have a shape producer copy the alpha mask from the shape frame to the b_frame
- if ( strcmp( resource, "rectangle" ) != 0 )
- {
- // Get the producer from the transition
- mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
-
- // If We have no producer then create one
- if ( producer == NULL || ( old_resource != NULL && strcmp( resource, old_resource ) ) )
- {
- // Get the factory producer service
- char *factory = mlt_properties_get( properties, "factory" );
-
- // Store the old resource
- mlt_properties_set( properties, "_old_resource", resource );
-
- // Special case circle resource
- if ( strcmp( resource, "circle" ) == 0 )
- resource = "pixbuf:<svg width='100' height='100'><circle cx='50' cy='50' r='50' fill='black'/></svg>";
-
- // Create the producer
- mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
- producer = mlt_factory_producer( profile, factory, resource );
-
- // If we have one
- if ( producer != NULL )
- {
- // Get the producer properties
- mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
-
- // Ensure that we loop
- mlt_properties_set( producer_properties, "eof", "loop" );
-
- // Now pass all producer. properties on the transition down
- mlt_properties_pass( producer_properties, properties, "producer." );
-
- // Register the producer for reuse/destruction
- mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
- }
- }
-
- // Now use the shape producer
- if ( producer != NULL )
- {
- // We will get the alpha frame from the producer
- mlt_frame shape_frame = NULL;
-
- // Make sure the producer is in the correct position
- mlt_producer_seek( producer, position );
-
- // Get the shape frame
- if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &shape_frame, 0 ) == 0 )
- {
- // Ensure that the shape frame will be closed
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( b_frame ), "shape_frame", shape_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
-
- // Specify the callback for evaluation
- b_frame->get_alpha_mask = filter_get_alpha_mask;
- }
- }
- }
-
- // Get the image
- error = mlt_frame_get_image( frame, image, format, width, height, 0 );
- }
-
- return error;
-}
-
-/** Filter processing.
-*/
-
-static mlt_frame transition_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
-{
- // Get the properties of the frame
- mlt_properties properties = MLT_FRAME_PROPERTIES( a_frame );
-
- // Get a unique name to store the frame position
- char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
-
- // Assign the current position to the name
- mlt_properties_set_position( properties, name, mlt_frame_get_position( a_frame ) );
-
- // Push the transition on to the frame
- mlt_frame_push_service( a_frame, this );
-
- // Push the b_frame on to the stack
- mlt_frame_push_frame( a_frame, b_frame );
-
- // Push the transition method
- mlt_frame_push_get_image( a_frame, transition_get_image );
-
- // Return the frame
- return a_frame;
-}
-
-/** Constructor for the transition.
-*/
-
-mlt_transition transition_region_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
-{
- // Create a new transition
- mlt_transition this = mlt_transition_new( );
-
- // Further initialisation
- if ( this != NULL )
- {
- // Get the properties from the transition
- mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
-
- // Assign the transition process method
- this->process = transition_process;
-
- // Default factory
- mlt_properties_set( properties, "factory", "fezzik" );
-
- // Resource defines the shape of the region
- mlt_properties_set( properties, "resource", arg == NULL ? "rectangle" : arg );
-
- // Inform apps and framework that this is a video only transition
- mlt_properties_set_int( properties, "_transition_type", 1 );
- }
-
- // Return the transition
- return this;
-}
-
projects / melted / blobdiff