/* * filter_watermark.c -- watermark filter * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates * * 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_watermark.h" #include #include #include #include #include #include #include /** 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 producer from the filter mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL ); // Get the composite from the filter mlt_transition composite = mlt_properties_get_data( properties, "composite", NULL ); // Get the resource to use char *resource = mlt_properties_get( properties, "resource" ); // Get the old resource char *old_resource = mlt_properties_get( properties, "_old_resource" ); // Create a composite if we don't have one if ( composite == NULL ) { // Create composite via the factory composite = mlt_factory_transition( "composite", NULL ); // Register the composite for reuse/destruction if ( composite != NULL ) mlt_properties_set_data( properties, "composite", composite, 0, ( mlt_destructor )mlt_transition_close, NULL ); } // If we have one if ( composite != NULL ) { // Get the properties mlt_properties composite_properties = mlt_transition_properties( composite ); // Pass all the composite. properties on the filter down mlt_properties_pass( composite_properties, properties, "composite." ); // Force a refresh mlt_properties_set_int( composite_properties, "refresh", 1 ); } // Create a producer if don't have one if ( producer == NULL || ( old_resource != NULL && strcmp( resource, old_resource ) ) ) { // Get the factory producer service char *factory = mlt_properties_get( properties, "factory" ); // Create the producer producer = mlt_factory_producer( factory, resource ); // If we have one if ( producer != NULL ) { // Register the producer for reuse/destruction mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL ); // Ensure that we loop mlt_properties_set( mlt_producer_properties( producer ), "eof", "loop" ); // Set the old resource mlt_properties_set( properties, "_old_resource", resource ); } } if ( producer != NULL ) { // Get the producer properties mlt_properties producer_properties = mlt_producer_properties( producer ); // Now pass all producer. properties on the filter down mlt_properties_pass( producer_properties, properties, "producer." ); } // Only continue if we have both producer and composite if ( composite != NULL && producer != NULL ) { // Get the service of the producer mlt_service service = mlt_producer_service( producer ); // We will get the 'b frame' from the producer mlt_frame b_frame = 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 ); // Make sure the producer is in the correct position mlt_producer_seek( producer, position ); // Resetting position to appease the composite transition mlt_frame_set_position( frame, position ); // Get the b frame and process with composite if successful if ( mlt_service_get_frame( service, &b_frame, 0 ) == 0 ) { // Get the a and b frame properties mlt_properties a_props = mlt_frame_properties( frame ); mlt_properties b_props = mlt_frame_properties( b_frame ); // Set the b frame to be in the same position and have same consumer requirements mlt_frame_set_position( b_frame, position ); mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) ); mlt_properties_set_int( b_props, "consumer_progressive", mlt_properties_get_double( a_props, "consumer_progressive" ) ); if ( mlt_properties_get_int( properties, "reverse" ) == 0 ) { // Apply all filters that are attached to this filter to the b frame mlt_service_apply_filters( mlt_filter_service( this ), b_frame, 0 ); // Process the frame mlt_transition_process( composite, frame, b_frame ); // Get the image error = mlt_frame_get_image( frame, image, format, width, height, 1 ); } else { mlt_transition_process( composite, b_frame, frame ); mlt_properties_set( a_props, "rescale.interp", "nearest" ); mlt_properties_set( b_props, "rescale.interp", "nearest" ); mlt_service_apply_filters( mlt_filter_service( this ), frame, 0 ); error = mlt_frame_get_image( b_frame, image, format, width, height, 1 ); mlt_properties_set_data( b_props, "image", *image, 0, NULL, NULL ); mlt_properties_set_data( a_props, "image", *image, *width * *height * 2, mlt_pool_release, NULL ); mlt_properties_set_int( a_props, "width", *width ); mlt_properties_set_int( a_props, "height", *height ); } } // Close the b frame mlt_frame_close( b_frame ); } else { // Get the image from the frame without running fx error = mlt_frame_get_image( frame, image, format, width, height, 1 ); } return error; } /** Filter processing. */ static mlt_frame filter_process( mlt_filter this, mlt_frame frame ) { // Get the properties of the frame mlt_properties properties = mlt_frame_properties( frame ); // Get a unique name to store the frame position char *name = mlt_properties_get( mlt_filter_properties( this ), "_unique_id" ); // Assign the current position to the name mlt_properties_set_position( properties, name, mlt_frame_get_position( frame ) - mlt_filter_get_in( this ) ); // Push the filter on to the stack mlt_frame_push_service( frame, this ); // Push the get_image on to the stack mlt_frame_push_get_image( frame, filter_get_image ); return frame; } /** Constructor for the filter. */ mlt_filter filter_watermark_init( void *arg ) { mlt_filter this = mlt_filter_new( ); if ( this != NULL ) { mlt_properties properties = mlt_filter_properties( this ); this->process = filter_process; mlt_properties_set( properties, "factory", "fezzik" ); if ( arg != NULL ) mlt_properties_set( properties, "resource", arg ); // Ensure that attached filters are handled privately mlt_properties_set_int( properties, "_filter_private", 1 ); } return this; }